WO2022124157A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2022124157A1 WO2022124157A1 PCT/JP2021/044085 JP2021044085W WO2022124157A1 WO 2022124157 A1 WO2022124157 A1 WO 2022124157A1 JP 2021044085 W JP2021044085 W JP 2021044085W WO 2022124157 A1 WO2022124157 A1 WO 2022124157A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inspection
- pad
- wiring
- display device
- inspection pad
- Prior art date
Links
- 239000000758 substrate Substances 0.000 claims abstract description 44
- 238000007689 inspection Methods 0.000 claims description 348
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000004020 conductor Substances 0.000 description 41
- 239000000523 sample Substances 0.000 description 21
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- 239000004925 Acrylic resin Substances 0.000 description 5
- 229920000178 Acrylic resin Polymers 0.000 description 5
- -1 Si 3 N 4 Substances 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 239000002861 polymer material Substances 0.000 description 5
- 238000010030 laminating Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000012447 hatching Effects 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229910020632 Co Mn Inorganic materials 0.000 description 2
- 229910020678 Co—Mn Inorganic materials 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001023 inorganic pigment Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000000016 photochemical curing Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910020630 Co Ni Inorganic materials 0.000 description 1
- 229910002440 Co–Ni Inorganic materials 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920001690 polydopamine Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/02—Composition of display devices
- G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Definitions
- the present disclosure relates to a display device such as an LED display device provided with a light emitting element such as a light emitting diode (LED) element.
- a display device such as an LED display device provided with a light emitting element such as a light emitting diode (LED) element.
- LED light emitting diode
- Patent Document 1 Conventionally, for example, the display device described in Patent Document 1 is known.
- the display device of the present disclosure includes a substrate having a first surface, a side surface, and a second surface opposite to the first surface.
- the display unit located on the first surface and An electrode pad located on the second surface and electrically connected to the display unit,
- the external connection terminal located on the second surface and A first wiring located on the second surface and electrically connecting the electrode pad and the external connection terminal, It comprises an inspection pad located on the second surface and electrically connected to the electrode pad.
- the inspection pad is located at a portion where at least a central portion does not overlap with the first wiring.
- the display device of the present disclosure includes a substrate having a first surface, a side surface, and a second surface opposite to the first surface.
- the display unit located on the first surface and An electrode pad located on the second surface and electrically connected to the display unit, A side wiring located from the first surface to the second surface via the side surface and electrically connecting the display unit and the electrode pad.
- the inspection pad is located at a portion where at least a central portion does not overlap with the side wiring.
- FIG. 6 is an enlarged plan view showing an enlarged portion of an inspection pad in the circuit configuration of FIG.
- FIG. 6 is an enlarged view showing a portion of an inspection pad in the circuit configuration of FIG. 6, and is an enlarged plan view of another embodiment.
- FIG. 6 is an enlarged view showing a portion of an inspection pad in the circuit configuration of FIG. 6, and is an enlarged plan view of another embodiment.
- FIG. 6 is an enlarged view showing a portion of an inspection pad in the circuit configuration of FIG. 6, and is an enlarged plan view of another embodiment.
- FIG. 6 is an enlarged view showing a portion of an inspection pad in the circuit configuration of FIG. 6, and is an enlarged plan view of another embodiment.
- FIG. 6 is an enlarged view showing a portion of an inspection pad in the circuit configuration of FIG.
- FIG. 6 is an enlarged plan view of another embodiment. It is a partial plan view of the main part of the display device which concerns on other embodiment of this disclosure. It is a partial side view of the main part of the display device of FIG. It is a partial cross-sectional view of the main part of the display device of FIG.
- a technique is known in which a plurality of display devices are combined (tiled) to produce a composite and large display device (hereinafter, also referred to as a multi-display).
- a composite and large display device hereinafter, also referred to as a multi-display.
- the inspection pad is provided in the peripheral area of the display area (so-called frame area), it is difficult to narrow the frame area when configuring a multi-display.
- the boundary portion (frame area) between the display devices may be visually recognized as black.
- the pixel closest to the frame area of the display unit of one display device (referred to as pixel a) and the pixel closest to the frame area of the display unit of the other display device to be tied to the display device.
- the pixel pitch between the pixels adjacent to a (referred to as pixel b) is larger than the pixel pitch of the pixels located in a portion other than the frame area of the display unit. That is, since the image pitch changes at the boundary portion (frame area) between the display devices, the pixel pitch becomes non-uniform periodically, and the viewer may feel a sense of discomfort with respect to the image.
- the inspection pad on the opposite side (back side) of the display device in order to prevent the inspection pad from obstructing the narrowing of the frame area.
- the inspection element such as the probe terminal with the inspection pad from the back surface side, and the inspection element is pressed against the electrode pad, the wiring conductor, the external connection terminal, etc. in the vicinity of the inspection pad.
- the electrode pads, wiring conductors, etc. may be damaged.
- each figure referred to below shows the main constituent members and the like of the display device which concerns on embodiment.
- the display device according to the present embodiment may have a well-known configuration such as a circuit board, a wiring conductor, a control IC, and a control LSI (not shown). Further, each figure referred to below is a schematic diagram, and the positions, dimensional ratios, and the like of the constituent members of the display device are not necessarily accurately illustrated.
- FIGS. 1 and 2 are diagrams showing a circuit configuration of the display device according to the embodiment of the present disclosure
- FIG. 3 is a cross-sectional view of the display device according to the embodiment of the present disclosure
- FIGS. 4 and 5 are. It is a figure which shows the circuit structure of the main part of the display device which concerns on one Embodiment of this disclosure.
- 6 to 10 are diagrams showing a circuit configuration of a main part of a display device according to another embodiment of the present disclosure
- FIGS. 11 and 12 show a circuit configuration of a display device according to another embodiment of the present disclosure.
- 13A to 13D, 14 are views showing an enlarged view of a portion of an inspection pad in the circuit configuration of FIG.
- FIGS. 1 and 11 are plan views viewed from the first surface side of the substrate
- FIGS. 2 and 12 are plan views viewed from the second surface side of the substrate.
- the first surface is also a front surface and a display surface
- the second surface is also a back surface and a counter-display surface.
- FIG. 3 is a partial cross section of a portion including the peripheral edge of the substrate.
- 4 to 10 are plan views seen from the second surface side of the substrate. In FIGS. 4 to 10, hatching is attached to the electrode pad, the external connection terminal, the inspection pad, and the side wiring for easy illustration.
- 13A to 13D, 14 are plan views seen from the second surface side of the substrate. In FIGS. 13A to 13D and 14, in order to facilitate the illustration, the inspection pad is shown with hatching.
- the display device 1 of the present disclosure includes a substrate 2, a display unit 3, an electrode pad 4, an external connection terminal 5, a first wiring 6, and an inspection pad 7.
- the display unit 3 includes a plurality of pixel units 3p, and the plurality of pixel units 3p are arranged in a matrix.
- the display device 1 of the present disclosure includes a substrate 2 having a first surface 2a, a side surface 2c, and a second surface 2b opposite to the first surface 2a, a display unit 3 located on the first surface 2a, and a first surface.
- a first wiring 6 for electrically connecting the external connection terminal 5 and an inspection pad 7 located on the second surface 2b and electrically connected to the electrode pad 4 are provided, and the inspection pad 7 is at least
- the central portion 7p (shown in FIGS. 13A and 14) is located at a portion that does not overlap with the first wiring 6.
- the display device 1 of the present disclosure has the following effects due to the above configuration. Since the inspection pad 7 is located on the opposite side of the display device 1, the frame area can be narrowed or the frame area can be eliminated. As a result, when the multi-display is configured, it is possible to prevent the viewer from seeing the boundary portion between the display devices 1. Further, it becomes easy to make the pixel pitch uniform by suppressing the change in the pixel pitch at the boundary between the display devices. As a result, it is possible to provide a high-definition multi-display with improved display quality. Further, since the inspection pad 7 is located at a portion on the second surface 2b where at least the central portion 7p does not overlap with the first wiring 6, an inspection member such as an inspection probe terminal is located in the vicinity of the inspection pad 7. It is possible to prevent damage to certain electrode pads, wiring conductors, external connection terminals 5, etc. by contacting or pressure-welding them. As a result, the manufacturing yield of the display device 1 is improved.
- the electrode pad (also referred to as a first electrode pad) 4 relays a signal for controlling the display unit 3, such as a scanning signal, an image signal, and a power supply voltage signal, to the display unit 3 and transmits the signal to the display unit 3. It may be a relay electrode pad. Further, the electrode pad 4 may be an electrode pad for connecting the side wiring connected to the side wiring 9.
- the shape of the electrode pad 4 may be various shapes such as a rectangle such as a square or a rectangle, or a polygon such as a circle, an ellipse, an oval, or a pentagon.
- the inspection member may be a thin rod-shaped inspection probe such as an inspection probe terminal, an inspection terminal, or an inspection jig provided with a convex inspection electrode pad or the like that can abut on a plurality of inspection pads 7 at one time. And so on.
- the inspection pad 7 may have a peripheral portion other than the central portion 7p overlapping the first wiring 6. In this case, since the inspection pad 7 is directly connected to the first wiring 6, the connection resistance between the inspection pad 7 and the first wiring 6 is reduced, and the inspection by the inspection pad 7 can be performed with high accuracy. Further, since the area of the portion required for arranging the inspection pad 7 is small, it becomes easy to cope with the narrowing of the pitch of the side wiring 9 and the first wiring 6.
- the inspection pad 7 may have a configuration in which the edge portion is in linear contact with the first wiring 6.
- the connection resistance between the inspection pad 7 and the first wiring 6 is reduced, and the inspection by the inspection pad 7 can be performed with high accuracy. Further, it is possible to prevent an inspection member such as a probe terminal from coming into contact with or pressure-welding the first wiring 6 in the vicinity of the inspection pad 7 and damaging it.
- the linear contact indicates a configuration in which the narrow edge portion of the inspection pad 7 overlaps the narrow edge portion of the first wiring 6 as shown in FIG.
- the width of the edges in linear contact may be about 1 ⁇ m to 100 ⁇ m, but is not limited to these values.
- "-" means "to", and the same shall apply hereinafter.
- the central portion 7p of the inspection pad 7 may have an area of 10% or more of the area of the inspection pad 7. If it is less than 10%, the first wiring 6 will be close to the center 7o of the inspection pad 7 with which the inspection member is in contact or pressure contact, and the inspection member may damage the first wiring 6.
- the inspection member may come into contact with or press contact with a region having an area including the center 7o of the inspection pad 7. Since the central portion 7p of the inspection pad 7 has an area of 10% or more of the area of the inspection pad 7, the first wiring 6 can be prevented from being too close to the center 7o, and the inspection member is the first wiring 6 The risk of damage can be reduced.
- the upper limit of the ratio of the area of the central portion 7p to the area of the inspection pad 7 is not particularly specified, but may be about 70%, about 60%, or about 50%.
- the inspection pad 7 has a circular shape, and the central portion 7p of the inspection pad 7 may also have a circular shape. In this case, the area of the inspection pad 7 can be reduced, and the shapes of the inspection pad 7 and the central portion 7p are similar to the shape of the tip portion of the inspection probe terminal, so that the inspection is easy.
- the inspection pad 7 has an elliptical shape that is long in the lateral direction (direction orthogonal to the direction in which the first wiring 6 extends), and the central portion 7p of the inspection pad 7 may have a similar elliptical shape. ..
- the area of the inspection pad 7 can be made relatively small, and the shapes of the inspection pad 7 and the central portion 7p are substantially similar to the shape of the tip portion of the inspection probe terminal, so that inspection is easy.
- the inspection pad 7 has a semicircular shape or a semicircular shape that is long in the lateral direction (direction orthogonal to the direction in which the first wiring 6 extends), and the central portion 7p of the inspection pad 7 is also a similar semicircle. It may be shaped or semi-tracked.
- the area of the inspection pad 7 can be made relatively small, and the connection area between the inspection pad 7 and the first wiring 6 can be kept large as in the configuration of FIG. 13A.
- the shapes of the inspection pad 7 and the central portion 7p are relatively similar to the shape of the tip portion of the inspection probe terminal, so that inspection is easy.
- the central portion 7p of the inspection pad 7 may have a shape similar to that of the inspection pad 7, but has a shape similar to the shape of the tip of the inspection probe terminal which is an inspection member, for example, a circular shape or an elliptical shape. It may be a shape. In this case, when the inspection probe terminal abuts on the central portion 7p of the inspection pad 7, it is possible to prevent the tip portion of the inspection probe terminal from abutting on the outside of the central portion 7p. In order to effectively achieve this purpose, the area of the central portion 7p of the inspection pad 7 may have a size larger than the area of the tip portion of the inspection probe terminal. Further, the area of the central portion 7p of the inspection pad 7 may be larger than the area of the tip portion of the inspection probe terminal. The area of the central portion 7p of the inspection pad 7 may be more than 1 time and 10 times or less the area of the tip portion of the inspection probe terminal, but is not limited to these values.
- the inspection pad 7 may have a configuration in which the entire inspection pad 7 is located at a portion that does not overlap with the first wiring 6. In this case, it is possible to reliably prevent the inspection member from coming into contact with the first wiring 6 by pressure contact or the like and being damaged.
- the substrate 2 is, for example, a transparent or opaque glass substrate, a plastic substrate, a ceramic substrate, or the like.
- the substrate 2 has a first surface 2a, a second surface 2b opposite to the first surface 2a, and a side surface 2c connecting the first surface 2a and the second surface 2b.
- the substrate 2 may be a composite substrate in which a plurality of types of substrates having different materials are laminated.
- the substrate 2 may be a flexible substrate such as a plastic substrate having a thin thickness and being flexible, that is, a so-called flexible substrate.
- the shape of the substrate 2 may be a triangular plate shape, a rectangular plate shape, a trapezoidal plate shape, a pentagonal plate shape, a hexagonal plate shape, a circular plate shape, an elliptical plate shape, or the like, or any other shape. May be good.
- the shape of the substrate 2 is an equilateral triangle plate shape, a rectangular plate shape, or a regular hexagonal plate shape, it becomes easy to tiling a plurality of display devices 1 to form a multi-display.
- the shape of the substrate 2 is a rectangular plate.
- the pixel unit 3p includes a light emitting element 31 and an electrode pad 32.
- the pixel unit 3p further includes a drive circuit for driving and controlling the light emitting element 31.
- the drive circuit may include a thin film transistor (TFT) and a capacitive element.
- the TFT may have, for example, a semiconductor film (also referred to as a channel) made of amorphous silicon (a-Si), low-Temperature Poly Silicon (LTPS), or the like.
- the TFT may have three terminals, a gate electrode, a source electrode, and a drain electrode.
- the TFT functions as a switching element that switches between conduction and non-conduction between the source electrode and the drain electrode according to the voltage applied to the gate electrode.
- the drive circuit may be formed by using a thin film forming method such as a chemical vapor deposition (CVD) method.
- the light emitting element 31 is, for example, a self-luminous light emitting element such as a light emitting diode (LED) element, an organic electroluminescence (OEL) element, or a semiconductor laser (Laser Diode: LD) element. May be good.
- a light emitting diode element which is a two-terminal element having an anode electrode 31a and a cathode electrode 31b is used.
- the light emitting element 31 may be a micro light emitting diode element (also referred to as a micro LED element).
- the light emitting element 31 When the light emitting element 31 is a micro LED element, the light emitting element 31 has a side length of about 1 ⁇ m or more and about 100 ⁇ m or less or about 3 ⁇ m or more and about 10 ⁇ m or less in a state of being arranged on the first surface 2a. It may have a plan view shape of the shape.
- the electrode pad 32 connected to the light emitting element 31 and supplying the drive signal to the light emitting element 31 is located on the first surface 2a of the substrate 2.
- the electrode pad 32 includes an anode pad 32a and a cathode pad 32b.
- the anode pad 32a and the cathode pad 32b are made of a conductive material.
- the anode pad 32a and the cathode pad 32b may be made of a single metal layer, or may be made by laminating a plurality of metal layers.
- the anode pad 32a and the cathode pad 32b may be made of, for example, Mo / Al / Mo, MoNd / AlNd / MoNd, or the like.
- Mo / Al / Mo indicates a laminated structure in which the Al layer is laminated on the Mo layer and the Mo layer is laminated on the Al layer.
- MoNd indicates that it is an alloy of Mo and Nd.
- the surface of the anode pad 32a and the surface of the cathode pad 32b may be each coated with a transparent conductive layer 32c made of indium tin oxide (ITO), indium zinc oxide (IZO), or the like.
- the anode electrode 31a and the cathode electrode 31b of the light emitting element 31 are electrically connected to the anode pad 32a and the cathode pad 32b of the electrode pad 32, respectively.
- the anode electrode 31a and the cathode electrode 31b may be electrically connected to the anode pad 32a and the cathode pad 32b, respectively, via a conductive bonding material such as a conductive adhesive or solder.
- the pixel unit 3p may be configured to include a plurality of light emitting elements 31, a plurality of anode pads 32a, and a cathode pad 32b.
- a plurality of anode electrodes 31a of the plurality of light emitting elements 31 are electrically connected to the plurality of anode pads 32a.
- the cathode pad 32b is a common cathode pad, and a plurality of cathode electrodes 31b of a plurality of light emitting elements 31 are commonly electrically connected to the cathode pad 32b.
- the plurality of light emitting elements 31 included in one pixel unit 3p may include a red light emitting element that emits red light, a green light emitting element that emits green light, and a blue light emitting element that emits blue light. ..
- the pixel unit 3p can display full-color gradation.
- the pixel unit 3p may have a light emitting element that emits orange light, red-orange light, red-purple light, or purple light instead of the red light emitting element.
- the pixel unit 3p may have a light emitting element that emits yellowish green light instead of the green light emitting element.
- the electrode pad 4 is arranged on the second surface 2b.
- the electrode pad 4 may be located at the peripheral edge of the second surface 2b in a plan view.
- the width of the peripheral edge portion may be about 30 ⁇ m to 150 ⁇ m.
- the electrode pad 4 is electrically connected to the pixel portion 3p arranged on the first surface 2a.
- the electrode pad 4 may be electrically connected to the TFT included in the pixel portion 3p, or may be electrically connected to the anode pad 32a or the cathode pad 32b.
- the electrode pad 4 is made of a conductive material.
- the electrode pad 4 may be made of a single metal layer, or may be made by laminating a plurality of metal layers.
- the electrode pad 4 may be made of, for example, Al, Al / Ti, Ti / Al / Ti, Mo, Mo / Al / Mo, MoNd / AlNd / MoNd, Cu, Cr, Ni, Ag and the like.
- FIG. 3 shows an example in which the electrode pad 4 is made of a single metal layer and is formed on the second surface 2b.
- the electrode pad 4 may be partially covered with an overcoat layer (not shown) made of a polymer material such as SiO 2 , Si 3 N 4 , acrylic resin or the like.
- the external connection terminal 5 is arranged on the second surface 2b.
- the external connection terminal 5 may be an electrode pad for supplying the light emission control signal Sig to the pixel unit 3p, or may be an electrode pad for supplying a power supply voltage to the pixel unit 3p.
- the light emission control signal Sig is a signal for controlling the light emission luminance of the pixel unit 3p.
- the power supply voltage may be the first power supply voltage Vdd supplied to the anode electrode 31a of the light emitting element 31, and the second power supply voltage lower than the first power supply voltage Vdd supplied to the cathode electrode 31b of the light emitting element 31. It may be Vss.
- a circuit board that outputs the light emission control signal Sig or the power supply voltages Vdd and Vss supplied to the pixel unit 3p can be connected to the external connection terminal 5.
- the circuit board may be a flexible printed circuit board (FPC) having a drive element such as an IC (Integrated Circuit) that controls the drive of the pixel portion 3p, circuit wiring, and the like.
- the external connection terminal 5 is made of a conductive material.
- the material and layer structure of the external connection terminal 5 may be the same as those of the electrode pad 4 described above.
- the first wiring 6 is arranged on the second surface 2b.
- the first wiring 6 connects the electrode pad 4 and the external connection terminal 5.
- the first wiring 6 may be formed in a straight line connecting the electrode pad 4 and the external connection terminal 5 in a plan view, or may be formed having one or a plurality of bent portions.
- the first wiring 6 is made of a conductive material.
- the material and layer structure of the first wiring 6 may be the same as those of the electrode pad 4 described above.
- the first wiring 6 may be at least partially covered with an overcoat layer (not shown) made of a polymer material such as SiO 2 , Si 3 N 4 , acrylic resin or the like.
- At least one inspection pad 7 is arranged on the second surface 2b.
- the inspection pad 7 is electrically connected to the electrode pad 4, and is electrically connected to the pixel portion 3p via the electrode pad 4.
- the inspection pad 7 is a pad for abutting the inspection member of the inspection device when inspecting the display device 1.
- the inspection of the display device 1 may be executed as follows.
- the inspection signal output from the inspection device is input to the inspection pad 7 from the inspection member.
- the inspection signal input to the inspection pad 7 is input to the pixel unit 3p via the electrode pad 4.
- the inspection may be performed as follows.
- a drive signal from the drive element connected to the external connection terminal 5 is input to the pixel unit 3p via the first wiring 6 and the electrode pad 4.
- the inspection member is brought into contact with the inspection pad 7 to detect the drive signal transmitted through the first wiring 6.
- it is possible to inspect whether or not the drive signal has a predetermined intensity (level), frequency, and timing, and whether or not the luminance or the like corresponding to the drive signal is obtained in the pixel unit 3p.
- the inspection pad 7 is made of a conductive material.
- the material and layer structure of the inspection pad 7 may be the same as those of the electrode pad 4 described above.
- the plan view shape of the inspection pad 7 may be, for example, a polygonal shape such as a triangular shape, a rectangular shape, a trapezoidal shape, a circular shape, an elliptical shape, or a pentagonal shape, or may have another shape.
- the inspection pad 7 may be electrically connected to the electrode pad 4. In other words, the inspection pad 7 may be directly connected to the electrode pad 4, the external connection terminal 5, or the first wiring 6. The inspection pad 7 may be connected to the electrode pad 4, the external connection terminal 5, or the first wiring 6 via the second wiring 11 arranged on the second surface 2b. In the present embodiment, for example, as shown in FIGS. 2 and 4, the inspection pad 7 is connected to the external connection terminal 5 via the second wiring 11.
- the material and layer structure of the second wiring 11 may be the same as those of the electrode pad 4 described above.
- the second wiring 11 may be formed in a straight line connecting the inspection pad 7 and the external connection terminal 5 in a plan view, or may be formed having one or a plurality of bent portions.
- the display device 1 can be configured to input an inspection signal imitating the light emission control signal Sig to the inspection pad 7 and inspect the light emission control signal line.
- the display device 1 can also be configured to input an inspection signal imitating the first power supply voltage Vdd or the second power supply voltage Vss to the inspection pad 7 to inspect the power supply voltage line.
- the display device 1 has another electrode pad (also referred to as a second electrode pad) 8 located on the first surface 2a and electrically connected to the display unit 3, and the first surface.
- a side wiring 9 located from 2a to the second surface 2b via the side surface 2c and connecting the first electrode pad 4 and the second electrode pad 8 may be provided.
- the second electrode pad 8 is electrically connected to the pixel unit 3p of the display unit 3.
- the second electrode pad 8 may be located on the peripheral edge of the first surface 2a in a plan view.
- the width of the peripheral edge portion may be about 30 ⁇ m to 150 ⁇ m.
- the second electrode pad 8 is made of a conductive material.
- the material and layer structure of the second electrode pad 8 may be the same as those of the electrode pad 4 described above.
- FIG. 3 shows an example in which the second electrode pad 8 is formed by laminating a metal layer 82 and a metal layer 88, and is arranged on the insulating layers 83 and 84 formed on the first surface 2a. .. Further, the back surface of the second electrode pad 8 is connected to a connection wiring 81 whose back surface is electrically connected to a TFT, a light emitting element 31, or the like.
- the insulating layer 87 may be arranged as a part of the layers between the metal layers 82 and 88, for example, as shown in FIG. Further, the insulating layers 85 and 86 may be arranged at the inner end (right side in FIG. 3) of the second electrode pad 8. As a result, it is possible to prevent the second electrode pad 8 from being short-circuited with the wiring conductor or the like arranged on the inner side.
- the insulating layers 83, 84, 85, 86, 87 are made of a polymer material such as SiO 2 , Si 3 N 4 , acrylic resin, or the like.
- the metal layer 88 on the surface side of the other electrode pad 8 may be a transparent conductive layer made of ITO, IZO, or the like.
- the second electrode pad 8 may be electrically connected to the pixel portion 3p via, for example, the first conductor pattern 10 formed on the first surface 2a.
- the first conductor pattern 10 may be made of, for example, Mo / Al / Mo, MoNd / AlNd / MoNd, or the like.
- the first conductor pattern 10 may be a scanning signal line, an image signal line, a light emission control signal line, or the like that connects the thin film transistor included in the pixel portion 3p and the second electrode pad 8.
- the first conductor pattern 10 may be a power supply wiring connecting the anode pad 32a or the cathode pad 32b and the second electrode pad 8.
- the anode pad 32a or the cathode pad 32b connected to the first conductor pattern 10 may be formed as a part of the first conductor pattern 10.
- the first conductor pattern 10 may be a linear conductor pattern or a planar conductor pattern.
- the first conductor pattern 10 is a power supply wiring for VSS that connects the cathode pad 32b and the second electrode pad 8, it may be a planar conductor pattern.
- the side surface wiring 9 is arranged from the first surface 2a to the second surface 2b via the side surface 2c.
- the side wiring 9 connects the second electrode pad 8 arranged on the first surface 2a and the first electrode pad 4 arranged on the second surface 2b.
- the side wiring 9 is a conductive paste containing conductive particles such as Ag, Cu, Al, and stainless steel, a resin component such as an uncured epoxy resin, an alcohol solvent such as ethyl alcohol, and water, etc., from the side surface 2c to the first. It can be formed by a method such as a heating method, a photo-curing method of curing by irradiation with light such as ultraviolet rays, a photo-curing heating method, or the like after applying the coating to desired portions on the surface 2a and the second surface 2b.
- the side wiring 9 can also be formed by a thin film forming method such as plating, vapor deposition, or CVD. Further, a groove may be formed in advance in the portion of the side surface 2c where the side surface wiring 9 is formed. This makes it easier for the conductive paste to be the side wiring 9 to be placed at a desired portion on the side surface.
- the first electrode pad 4 and the first electrode pad 4 are located.
- the two electrode pads 8 may overlap with each other in a plan view.
- the wiring length of the side wiring 9 connecting the first electrode pad 4 and the second electrode pad 8 can be shortened, and the resistance can be reduced. Further, it is possible to prevent the side wiring 9 from coming into contact with other wiring pads, wiring conductors, etc. of the display device 1 and causing a short circuit.
- the first electrode pad 4 and the second electrode pad 8 can be connected by using a through conductor such as a through hole that penetrates the substrate 2 from the first surface 2a to the second surface 2b.
- a through conductor such as a through hole that penetrates the substrate 2 from the first surface 2a to the second surface 2b.
- the side wiring 9 may be covered with an overcoat layer made of a polymer material such as SiO 2 , Si 3 N 4 , acrylic resin or the like. With this configuration, the side wiring 9 is protected by the overcoat layer, and it is possible to prevent the side wiring 9 from being damaged, chipped, peeled, or the like. Further, the overcoat layer may be made of a photocurable or thermosetting resin material containing a light-absorbing material (light-shielding material). The light-absorbing material may be, for example, an inorganic pigment.
- the inorganic pigments are carbon-based pigments such as carbon black, nitride-based pigments such as titanium black, Cr-Fe-Co-based, Cu-Co-Mn (manganese) -based, Fe-Co-Mn-based, and Fe-Co-Ni.
- -It may be a metal oxide pigment such as Cr.
- the inspection pad 7 may be connected to the external connection terminal 5 by the second wiring 11 arranged on the second surface 2b, for example, as shown in FIGS. 2 and 4.
- the second wiring 11 one end 11d may be connected to the external connection terminal 5, and the other end 11e may be connected to the inspection pad 7.
- the degree of freedom in arranging the inspection pad 7 can be increased.
- the inspection pad 7 is sufficiently separated from other wiring pads, wiring conductors, etc. arranged on the second surface 2b, and the inspection member is separated. It can be placed in a position where it is easy to make contact.
- the inspection pad 7 may be configured such that at least the central portion is located at a portion where the other end portion of the second wiring 11 does not overlap. In the case of this configuration, it is possible to prevent the inspection member such as the inspection probe terminal from coming into contact with or pressure-welding the second wiring 11 in the vicinity of the inspection pad 7 and being damaged.
- the inspection pad 7 may be located at a portion opposite to the first electrode pad 4 with respect to the external connection terminal 5.
- the inspection pad 7 can be arranged at a position sufficiently separated from the first electrode pad 4, the external connection terminal 5, and the first wiring 6.
- a plurality of inspection pads 7 are provided, and the plurality of inspection pads 7 may include a first inspection pad 71 and a second inspection pad 72.
- the first inspection pad 71 and the second inspection pad 72 may be in linear contact with the second wiring 11 in the form of the linear contact described above, and may be arranged along the direction in which the second wiring 11 extends.
- the two inspection members are brought into contact with the first inspection pad 71 and the second inspection pad 72, respectively, and the inspection signal is transmitted to the second inspection pad.
- a stable inspection signal can be input to the pixel unit 3p.
- the first inspection pad 71 and the second inspection pad 72 are the other end of the second wiring 11. They may be arranged so as to face each other with 11e in between.
- FIGS. 6 to 10 are the same as the display devices shown in FIGS. 1 to 5 because the mode of electrical connection between the inspection pad and the electrode pad is different and the other parts have the same configuration. A detailed description of the configuration of is omitted.
- the inspection pad 7 may be directly connected to the first wiring 6 in the form of the linear contact or the like described above. As a result, signal attenuation, voltage drop, and the like between the inspection pad 7 and the first electrode pad 4 can be reduced, so that the inspection accuracy can be improved, and the reliability of the display device 1 can be improved.
- the inspection pad 7 when the inspection pad 7 is directly connected to the first wiring 6 without going through the second wiring 11, when the high frequency inspection signal is used, the electric resistance of the second wiring 11 and the second wiring 11 It is possible to eliminate the delay of the inspection signal and the dullness of the waveform of the inspection signal due to the parasitic capacitance between the display device 1 and the other wiring conductors. This makes it possible to use not only DC voltage or low frequency inspection signals but also high frequency inspection signals, so that various types of inspections can be performed, which in turn improves the reliability of the display device 1. be able to.
- the entire side of the inspection pad 7 linearly contacts the first wiring 6 as shown in FIG. 6, for example. You may be doing it.
- the contact resistance between the inspection pad 7 and the first wiring 6 can be reduced, signal attenuation, voltage drop, and the like between the inspection pad 7 and the electrode pad 4 can be effectively reduced. As a result, the inspection accuracy can be improved, and the reliability of the display device 1 can be improved.
- the inspection pad 7 may be directly connected to a portion closer to the external connection terminal 5 than the first electrode pad 4 in the first wiring 6.
- the inspection pad 7 By arranging the inspection pad 7 in the vicinity of the external connection terminal 5 to which the light emission control signal, the power supply voltage, etc. are input, it is possible to inspect the signal input state closer to the signal input state of the display device 1 as a product. Therefore, the reliability of the display device 1 can be further improved. That is, various signals input from the external connection terminal 5 are transmitted through the first wiring 6, so that a slight voltage drop occurs due to the resistance of the first wiring 6.
- the inspection pad 7 is connected to a portion closer to the first electrode pad 4 than the external connection terminal 5 in the first wiring 6, the voltage dropped signal is inspected. Further, the voltage drop differs depending on the length and width of each first wiring 6. Therefore, in this case, the signal input state slightly separated from the signal input state of the display device 1 as a product is inspected.
- a plurality of inspection pads 7 may be provided, and they may be arranged along the direction in which the first wiring 6 extends.
- the plurality of inspection pads 7 may include a first inspection pad 71 and a second inspection pad 72.
- the first inspection pad 71 and the second inspection pad 72 are directly connected to the first wiring 6 in the form of linear contact or the like described above.
- the two inspection members are brought into contact with the first inspection pad 71 and the second inspection pad 72, respectively, and the inspection signal is transmitted to the second inspection pad.
- a stable inspection signal can be input to the pixel unit 3p.
- the inspection accuracy can be improved, and the reliability of the display device 1 can be improved.
- the inspection pad 7 is provided with a third wiring 12 located on the second surface 2b and one end portion 12d is connected to the first wiring 6, and the inspection pad 7 is the other end portion 12e of the third wiring 12. It may be configured to be connected to.
- the wiring length from the inspection pad 7 to the electrode pad 4 via the third wiring 12 and the first wiring 6, and the wiring from the external connection terminal 5 to the electrode pad 4 via the first wiring 6 The length can be made approximately equal.
- one end portion 12d may be connected to the central portion of the first wiring 6.
- the wiring length from the inspection pad 7 to the electrode pad 4 via the third wiring 12 and the first wiring 6, and the wiring from the external connection terminal 5 to the electrode pad 4 via the first wiring 6 The length and can be made more equal.
- the central portion of the first wiring 6 to which one end portion 12d of the third wiring 12 is connected may be a portion having a length of about 40% to 60% from one end of the first wiring 6 and may be 45% to 55%. It may be a part of a certain length.
- the inspection pad 7 may be configured such that at least the central portion is located at a portion where the other end portion of the third wiring 12 does not overlap. In the case of this configuration, it is possible to prevent the inspection member such as the inspection probe terminal from coming into contact with or pressure-welding the third wiring 12 in the vicinity of the inspection pad 7 and damaging it.
- the configuration shown in FIG. 9 may be such that a plurality of inspection pads 7 are provided, and they are arranged along the direction in which the third wiring 12 extends.
- the plurality of inspection pads 7 may include a first inspection pad 71 and a second inspection pad 72.
- the first inspection pad 71 and the second inspection pad 72 are connected to the first wiring 6 via the third wiring 12.
- the first inspection pad 71 and the second inspection pad 72 may be arranged along the direction in which the third wiring 12 extends. This makes it possible to input a stable inspection signal to the pixel unit 3p even when a high voltage or large current inspection signal is input to the pixel unit 3p.
- the wiring length leading to the electrode pad 4 can be made substantially equal.
- the display device 1 includes a substrate 2, a display unit 3, a plurality of first electrode pads 4, a plurality of external connection terminals 5, a plurality of first wirings 6, and a plurality of the display devices 1. It may be configured to include the inspection pad 7 of the above.
- the display unit 3 is configured to include a large number of pixel units 3p, and is arranged on the first surface 2a of the substrate 2.
- the display unit 3 has a matrix shape in which a large number of pixel units 3p are arranged in a matrix in the first direction (horizontal direction in FIG. 11) D1 and the second direction (vertical direction in FIG. 11) D2 where the display unit 3 intersects in the row direction. Has the configuration of.
- the plurality of first electrode pads 4 are arranged on the second surface 2b of the substrate 2. Each of the plurality of first electrode pads 4 is electrically connected to a plurality of pixel units 3p included in each row of the display unit 3. As shown in FIGS. 11 and 12, each first electrode pad 4 is electrically connected to a plurality of pixel portions 3p via a side wiring 9, a second electrode pad 8, and a first conductor pattern 10. ..
- the plurality of first electrode pads 4 may be located on the peripheral edge of the second surface 2b in a plan view and may be arranged along the first direction D1.
- a plurality of external connection terminals 5 are arranged on the second surface 2b.
- the plurality of external connection terminals 5 are located at the center of the second surface 2b in a plan view.
- the plurality of external connection terminals 5 may be arranged along the first predetermined direction.
- the first predetermined direction may be the first direction D1 or may be a direction intersecting the first direction D1.
- a light emission control signal Sigma to be supplied to a plurality of pixel portions 3p electrically connected to the external connection terminal 5 is input to each external connection terminal 5.
- the plurality of first wirings 6 are arranged on the second surface 2b.
- the plurality of first wirings 6 are located between the plurality of first electrode pads 4 and the plurality of external connection terminals 5 in a plan view, and the plurality of first electrode pads 4 and the plurality of external connection terminals 5 are respectively located. You are connected.
- the plurality of inspection pads 7 are arranged on the second surface 2b.
- the plurality of inspection pads 7 are electrically connected to the plurality of electrode pads 4, respectively.
- the plurality of inspection pads 7 may be electrically connected to the plurality of first electrode pads 4, respectively.
- the plurality of inspection pads 7 may be directly connected to each of the plurality of first electrode pads 4, may be directly connected to each of the plurality of external connection terminals 5, and may be directly connected to each of the plurality of first wirings 6. It may have been done.
- Each inspection pad 7 is connected to the first electrode pad 4, the external connection terminal 5, or the first wiring 6 corresponding to the inspection pad 7 via the second wiring 11 arranged on the second surface 2b. You may. In the present embodiment, for example, as shown in FIG. 12, each inspection pad 7 is connected to an external connection terminal 5 corresponding to the inspection pad 7 via a second wiring 11 arranged on the second surface 2b. Has been done.
- the inspection pad 7 may be configured to be located in the central portion 2bp of the second surface 2b.
- the area of the central portion 2bp may be 10% or more of the area of the second surface 2b. If it is less than 10%, the contact force is concentrated on the central portion 2bp of the second surface 2b at the time of inspection, and the substrate 2 tends to bend.
- the upper limit of the ratio of the area of the central portion 2bp to the area of the second surface 2b is not particularly specified, but may be about 70%, about 60%, or about 50%.
- the display device 1 can inspect the light emission control signal line by inputting an electric signal imitating the light emission control signal Sig to the plurality of inspection pads 7.
- the plurality of inspection pads 7 may be located on the opposite side of the plurality of first electrode pads 4 with respect to the plurality of external connection terminals 5.
- the plurality of inspection pads 7 are regions on the second surface 2b where the plurality of first electrode pads 4 and the plurality of first wirings 6 are not provided, and the plurality of first electrode pads 4 and the plurality of are.
- the first wiring 6 and the plurality of inspection pads 7 may be arranged in a region sandwiching the external connection terminal 5. As a result, the possibility of damaging the first electrode pad 4 or the first wiring 6 at the time of inspection can be further reduced, so that the reliability of the display device can be further improved.
- the plurality of inspection pads 7 may be arranged in a staggered pattern, for example, as shown in FIG. That is, a plurality of second wiring 11s to which the inspection pad 7 is connected to the other end may be arranged in parallel with each other, and those having a long wiring length and those having a short wiring length may be alternately arranged. In this case, since the distance between the adjacent inspection pads 7 can be widened, it becomes easy to bring the inspection member into contact with each inspection pad 7. As a result, the inspection accuracy can be improved and the reliability of the display device 1 can be improved.
- the inspection pad 7 is not limited to the configuration shown in FIG. 12, and may have the configuration shown in any of FIGS. 4 to 10.
- Each of the plurality of first electrode pads 4 and the plurality of pixel portions 3p electrically connected to the first electrode pad 4 are electrically connected via the second electrode pad 8 and the side wiring 9. May be. Further, the second electrode pad 8 and the plurality of pixel portions 3p electrically connected to the second electrode pad 8 may be electrically connected via the first conductor pattern 10.
- the plurality of inspection pads 7 are arranged not on the first surface 2a on which the display unit 3 is arranged, but on the second surface 2b opposite to the first surface 2a. Since it is installed, the area of the frame area can be reduced. As a result, when the multi-display is configured, the frame area becomes inconspicuous, the pixel pitch of the multi-display can be made uniform, and it is possible to provide a high-definition multi-display with improved display quality. Further, since the display device 1 can increase the degree of freedom in the positions, areas, and shapes of the plurality of inspection pads 7, it is possible to provide the display device 1 in which the inspection members can be easily brought into contact with each other. As a result, it is possible to reduce the risk of damaging the electrode pads, wiring conductors, etc. of the display device 1 during inspection, thereby improving the inspection accuracy and improving the reliability of the display device 1.
- the display device 1 may further have a configuration for inspecting the power supply voltage line. ..
- the display device 1 further includes a plurality of electrode pads 4a, a plurality of external connection terminals 5a, a plurality of first wirings 6a, and a plurality of inspection pads 7a. May be.
- the plurality of electrode pads 4a are arranged on the second surface 2b of the substrate 2. Each electrode pad 4a may be formed in the same manner as the electrode pad 4 by using the same conductive material as the electrode pad 4.
- Each of the plurality of electrode pads 4a is electrically connected to a large number of pixel units 3p included in the display unit 3. As shown in FIGS. 11 and 12, each electrode pad 4a is electrically connected to a plurality of pixel portions 3p via side wiring 9a, a second electrode pad 8a, and a first conductor pattern 10a.
- the plurality of electrode pads 4a may be located on the peripheral edge of the second surface 2b in a plan view and may be arranged along the second direction D2.
- a plurality of external connection terminals 5a are arranged on the second surface 2b. Each external connection terminal 5a may be formed in the same manner as the external connection terminal 5 by using the same conductive material as the external connection terminal 5. The plurality of external connection terminals 5a are located at the center of the second surface 2b in a plan view. The plurality of external connection terminals 5a may be arranged along the second predetermined direction. The second predetermined direction may be the second direction D2 or may be a direction intersecting the second direction D2. The plurality of external connection terminals 5a include at least one first external connection terminal 5a1 and at least one second external connection terminal 5a2.
- the first power supply voltage Vdd to be supplied to the display unit 3 is input to the first external connection terminal 5a1, and the second power supply voltage Vss to be supplied to the display unit 3 is input to the second external connection terminal 5a2.
- the first power supply voltage Vdd may be, for example, an anode voltage of about 10V to 15V.
- the second power supply voltage Vss may be lower than the first power supply voltage Vdd, and may be, for example, a cathode voltage of about 0V to 3V.
- the plurality of first wirings 6a are arranged on the second surface 2b. Each first wiring 6a may be formed in the same manner as the first wiring 6 by using the same conductive material as the first wiring 6.
- the plurality of first wirings 6a are located between the plurality of electrode pads 4a and the plurality of external connection terminals 5a in a plan view, and connect the plurality of electrode pads 4a and the plurality of external connection terminals 5a, respectively. ..
- a plurality of inspection pads 7a are arranged on the second surface 2b. Each inspection pad 7a may be formed in the same manner as the inspection pad 7 by using the same conductive material as the inspection pad 7.
- the plurality of inspection pads 7a are electrically connected to each of the plurality of first electrode pads 4a.
- the plurality of inspection pads 7a may be directly connected to the plurality of electrode pads 4a, may be directly connected to the plurality of external connection terminals 5a1 and 5a2, respectively, and may be directly connected to the plurality of first wirings 6a. It may have been done.
- Each inspection pad 7a is externally connected to a first electrode pad 4a corresponding to the inspection pad 7a via a second wiring 11a or a third wiring 12 (described in FIG.
- each inspection pad 7a has external connection terminals 5a1, 5a2 corresponding to the inspection pad 7a via a second wiring 11a arranged on the second surface 2b. Is connected to.
- the second wiring 11a may be formed in the same manner as the second wiring 11 by using the same conductive material as the second wiring 11.
- the display device 1 inputs an inspection signal imitating the first power supply voltage Vdd to the inspection pad 7a connected to the first external connection terminal 5a1, and the second power supply to the inspection pad 7a connected to the second external connection terminal 5a2.
- an inspection signal imitating the voltage Vss By inputting an inspection signal imitating the voltage Vss, the power supply voltage line can be inspected.
- the display device 1 inspects the scanning signal line for selecting the pixel portion 3p to which the light emission control signal Sig is written, and inspects the image signal line for inputting the image signal to the pixel portion 3p. It may be configured.
- FIG. 15 is a partial plan view of a main part of the display device according to another embodiment of the present disclosure
- FIG. 16 is a partial side view of the main part of the display device of FIG.
- FIG. 17 is a view of FIG. It is a partial cross-sectional view of the main part of the display device of.
- the inspection pad and the side wiring are shown with hatching for ease of illustration.
- the display device 1a of the present disclosure shown in FIG. 15 has a substrate 2 having a first surface 2a, a side surface 2c, and a second surface 2b opposite to the first surface 2a, and a display unit located on the first surface 2a. 3, the electrode pad 4 located on the second surface 2b and electrically connected to the display unit 3, and the display unit 3 and the electrodes located from the first surface 2a to the second surface 2b via the side surface 2c.
- a side wiring 9 for electrically connecting the pad 4 and an inspection pad 7c located on the side surface 2c and electrically connected to the side wiring 9 are provided, and the inspection pad 7c is at least a central portion 7cp (FIG. 16). (Described in) is located in a portion that does not overlap with the side wiring 9.
- the display device 1a of the present disclosure has the following effects due to the above configuration. Since the inspection pad 7c is located on the side surface 2c of the substrate 2, the frame area can be narrowed or the frame area can be eliminated. As a result, when the multi-display is configured, it is possible to prevent the viewer from seeing the boundary portion between the display devices 1a. Further, it becomes easy to make the pixel pitch uniform by suppressing the change in the pixel pitch at the boundary portion between the display devices 1a. As a result, it is possible to provide a high-definition multi-display with improved display quality.
- the inspection pad 7c is located at a portion on the side surface 2c where at least the central portion 7cp does not overlap with the side surface wiring 9, the inspection member such as the inspection probe terminal is located on the side surface wiring in the vicinity of the inspection pad 7c. It is possible to prevent the side wiring 9 from being damaged by contacting, pressure contacting, or the like with the 9. As a result, the manufacturing yield of the display device 1a is improved.
- the central portion 7cp of the inspection pad 7c may have an area of 10% or more of the area of the inspection pad 7c. If it is less than 10%, the side wiring 9 will be close to the center 7co of the inspection pad 7c with which the inspection member is in contact or pressure contact, and the inspection member may damage the side wiring 9.
- the inspection member may come into contact with or press contact with a region having an area including the center 7co of the inspection pad 7c. Since the central portion 7cp of the inspection pad 7 has an area of 10% or more of the area of the inspection pad 7, the side wiring 9 can be prevented from being too close to the center 7co, and the inspection member damages the side wiring 9. The risk of wiring can be reduced.
- the upper limit of the ratio of the area of the central portion 7 cp to the area of the inspection pad 7c is not particularly specified, but may be about 70%, about 60%, or about 50%.
- the inspection pad 7c may have a configuration in which the edge portion thereof is in linear contact with the side wiring 9.
- the inspection pad 7c since the inspection pad 7c is directly connected to the side wiring 9, the connection resistance between the inspection pad 7c and the side wiring 9 is reduced, and the inspection by the inspection pad 7c can be performed with high accuracy. Further, it is possible to prevent the inspection member such as the probe terminal from coming into contact with or pressure-welding the side wiring 9 in the vicinity of the inspection pad 7c and damaging it.
- the width of the edges in linear contact may be about 1 ⁇ m to 100 ⁇ m, but is not limited to these values.
- the width 7cw of the inspection pad 7c may be smaller than the width 9w of the side wiring 9. With this configuration, it becomes easy to arrange the inspection pad 7c on the side surface 2c having a small area. Further, when there are a plurality of side wirings 9, it becomes easy to provide the inspection pad 7c on each side wiring 9. Further, when the pixel pitch becomes narrow, the adjacent spacing of the side wiring 9 also becomes narrow, but it is possible to prevent a certain side wiring 9 and the side wiring 9 adjacent to the side wiring 9 from being short-circuited.
- the width of the inspection pad 7c may be 30% or more and less than 100% of the width of the side wiring 9 (about 10 ⁇ m to 300 ⁇ m), but the width is not limited to this range.
- the inspection pad 7c may have the same configuration as that of FIGS. 13B, 13C, and 13D. In the case of these configurations, each of the above-mentioned effects is achieved.
- the inspection pad 7c may have a configuration having an extending portion 7ce extending to at least one side of the first surface 2a and the second surface 2b.
- the length of the extending portion 7ce may be about 0.1 to 2 times the length of the main body portion of the inspection pad 7c on the side surface 2c, but is not limited to this range.
- the side wiring 9 is connected to the connection line 8c connected to the second electrode pad 8 on the first surface 2a side of the substrate 2, and is connected to the first electrode pad 4 on the second surface 2b side of the substrate 2. It is connected to the connection line 4c.
- the thickness of the main body portion of the inspection pad 7c on the side surface 2c may be thicker than the thickness of the extension portion 7ce. In this case, even if an inspection member such as an inspection probe terminal comes into contact with or is pressed against the main body of the inspection pad 7c, it becomes easy to prevent the main body of the inspection pad 7c from being damaged.
- the thickness of the main body of the inspection pad 7c may be more than 1 times and 10 times or less the thickness of the extending portion 7ce, but is not limited to this range.
- the inspection pad 7c may be covered with an overcoat layer made of a polymer material such as SiO 2 , Si 3 N 4 , acrylic resin or the like. With this configuration, the inspection pad 7c is protected by the overcoat layer, and it is possible to prevent the inspection pad 7c from being damaged, chipped, peeled off, or the like.
- the overcoat layer covering the inspection pad 7c may be formed after the inspection by the inspection pad 7c is completed. Further, the overcoat layer covering the inspection pad 7c may be the same as the overcoat layer covering the side wiring 9. In this case, the overcoat layer may cover the entire surface of the side surface 2c.
- the inspection pad 7 located on the second surface 2b of the substrate 2 may also be covered with an overcoat layer.
- the overcoat layer covering the inspection pad 7 may be formed after the inspection by the inspection pad 7 is completed.
- the frame area can be narrowed or the frame area can be eliminated.
- the inspection pad is located on the opposite side of the display device, the frame area can be narrowed or the frame area can be eliminated.
- the inspection pad is located at a portion on the second surface where at least the central portion does not overlap with the first wiring, the inspection member such as the inspection probe terminal is an electrode pad and wiring in the vicinity of the inspection pad. It is possible to prevent the electrode pad, the wiring conductor, the external connection terminal, and the like from being damaged due to contact with or pressure contact with the conductor or the like. As a result, the manufacturing yield of the display device is improved.
- the frame area can be narrowed or the frame area can be eliminated.
- the inspection pad is located on the side surface of the substrate, the frame area can be narrowed or the frame area can be eliminated.
- the inspection pad is located at a portion on the side surface where at least the central portion does not overlap with the side wiring, the inspection member such as the inspection probe terminal comes into contact with the side wiring in the vicinity of the inspection pad, pressure contact, etc. Therefore, it is possible to prevent the side wiring from being damaged. As a result, the manufacturing yield of the display device is improved.
- the display device of the present disclosure can be applied to various electronic devices.
- the electronic devices include automobile route guidance systems (car navigation systems), ship route guidance systems, aircraft route guidance systems, instrument indicators for vehicles such as automobiles, instrument panels, smartphone terminals, mobile phones, tablet terminals, and personals.
- Digital assistants (PDAs) video cameras, digital still cameras, electronic notebooks, electronic books, electronic dictionaries, personal computers, copying machines, game equipment terminals, televisions, product display tags, price display tags, industrial programmable displays.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
前記第1面上に位置する表示部と、
前記第2面上に位置し、前記表示部に電気的に接続される電極パッドと、
前記第2面上に位置する外部接続端子と、
前記第2面上に位置し、前記電極パッドと前記外部接続端子とを電気的に接続する第1配線と、
前記第2面上に位置し、前記電極パッドに電気的に接続される検査パッドと、を備え、
前記検査パッドは、少なくとも中心部が前記第1配線に重ならない部位に位置している。
前記第1面上に位置する表示部と、
前記第2面上に位置し、前記表示部に電気的に接続される電極パッドと、
前記第1面から前記側面を介して前記第2面にかけて位置し、前記表示部と前記電極パッドを電気的に接続する側面配線と、
前記側面上に位置し、前記側面配線に電気的に接続される検査パッドと、を備え、
前記検査パッドは、少なくとも中心部が前記側面配線に重ならない部位に位置している。
2 基板
2a 第1面
2b 第2面
2bp 中心部
2c 側面
3 表示部
3p 画素部
31 発光素子
31a アノード電極
31b カソード電極
32 電極パッド
32a アノードパッド
32b カソードパッド
32c 透明導電層
4,4a 電極パッド(第1電極パッド)
4c 接続線
5,5a 外部接続端子
5a1 外部接続端子(第1外部接続端子)
5a2 外部接続端子(第2外部接続端子)
6,6a 第1配線
7,7a,7c 検査パッド
7o,7co 中心
7p,7cp 中心部
71 第1検査パッド
72 第2検査パッド
8,8a 他の電極パッド(第2電極パッド)
8c 接続線
81 接続配線
82 金属層
83,84,85,86,87 絶縁層
88 透明導電層
9,9a 側面配線
10,10a 第1導体パターン
11,11a 第2配線
11d 一端部
11e 他端部
12 第3配線
12d 一端部
12e 他端部
Claims (19)
- 第1面と側面と前記第1面とは反対側の第2面とを有する基板と、
前記第1面上に位置する表示部と、
前記第2面上に位置し、前記表示部に電気的に接続される電極パッドと、
前記第2面上に位置する外部接続端子と、
前記第2面上に位置し、前記電極パッドと前記外部接続端子とを電気的に接続する第1配線と、
前記第2面上に位置し、前記電極パッドに電気的に接続される検査パッドと、を備え、
前記検査パッドは、少なくとも中心部が前記第1配線に重ならない部位に位置している表示装置。 - 前記検査パッドは、その縁部が前記第1配線に線状に接触している、請求項1に記載の表示装置。
- 前記検査パッドは、前記第1配線における前記電極パッドよりも前記外部接続端子寄りの部位に接続されている、請求項2に記載の表示装置。
- 複数の前記検査パッドを備え、
それらは前記第1配線が延びる方向に沿って並んでいる、請求項2または3に記載の表示装置。 - 前記検査パッドの前記中心部は、前記検査パッドの面積の10%以上の面積を有する、請求項1~4のいずれか1項に記載の表示装置。
- 前記検査パッドは、その全体が前記第1配線に重ならない部位に位置している、請求項1に記載の表示装置。
- 前記第2面に位置し、一端部が前記外部接続端子に接続される第2配線を備え、
前記検査パッドは、前記第2配線の他端部に接続されている、請求項6に記載の表示装置。 - 前記検査パッドは、前記外部接続端子に対して、前記電極パッドと反対側の部位に位置している、請求項7に記載の表示装置。
- 複数の前記検査パッドを備え、
それらは前記第2配線が延びる方向に沿って並んでいる、請求項7または8に記載の表示装置。 - 前記第2面に位置し、一端部が前記第1配線に接続される第3配線を備え、
前記検査パッドは、前記第3配線の他端部に接続されている、請求項6に記載の表示装置。 - 複数の前記検査パッドを備え、
それらは、前記第3配線が延びる方向に沿って並んでいる、請求項10に記載の表示装置。 - 前記検査パッドは、前記第2面の中心部に位置している、請求項6~11のいずれか1項に記載の表示装置。
- 前記電極パッドは、前記第2面の周縁部に位置している、請求項1~12のいずれか1項に記載の表示装置。
- 前記第1面上に位置し、前記表示部に電気的に接続される他の電極パッドと、
前記第1面から前記側面を介して前記第2面にかけて位置し、前記電極パッドと前記他の電極パッドを接続する側面配線と、を備える、請求項1~13のいずれか1項に記載の表示装置。 - 前記表示部は、マイクロ発光ダイオード素子を含む、請求項1~14のいずれか1項に記載の表示装置。
- 第1面と側面と前記第1面とは反対側の第2面とを有する基板と、
前記第1面上に位置する表示部と、
前記第2面上に位置し、前記表示部に電気的に接続される電極パッドと、
前記第1面から前記側面を介して前記第2面にかけて位置し、前記表示部と前記電極パッドを電気的に接続する側面配線と、
前記側面上に位置し、前記側面配線に電気的に接続される検査パッドと、を備え、
前記検査パッドは、少なくとも中心部が前記側面配線に重ならない部位に位置している表示装置。 - 前記検査パッドは、その縁部が前記側面配線に線状に接触している、請求項16に記載の表示装置。
- 前記検査パッドは、その幅が前記側面配線の幅よりも小さい、請求項16または17に記載の表示装置。
- 前記検査パッドは、前記第1面および前記第2面の少なくとも一方の側に延出する延出部を有する、請求項16~18のいずれか1項に記載の表示装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/265,793 US20240038953A1 (en) | 2020-12-08 | 2021-12-01 | Display device |
JP2022568216A JP7478257B2 (ja) | 2020-12-08 | 2021-12-01 | 表示装置 |
CN202180081481.1A CN116547736A (zh) | 2020-12-08 | 2021-12-01 | 显示装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020203724 | 2020-12-08 | ||
JP2020-203724 | 2020-12-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022124157A1 true WO2022124157A1 (ja) | 2022-06-16 |
Family
ID=81973930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/044085 WO2022124157A1 (ja) | 2020-12-08 | 2021-12-01 | 表示装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20240038953A1 (ja) |
JP (1) | JP7478257B2 (ja) |
CN (1) | CN116547736A (ja) |
WO (1) | WO2022124157A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI835553B (zh) * | 2023-02-09 | 2024-03-11 | 友達光電股份有限公司 | 電路基板及其製造方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11183933A (ja) * | 1997-12-19 | 1999-07-09 | Toshiba Electronic Engineering Corp | 表示装置用アレイ基板 |
US20150243371A1 (en) * | 2007-12-12 | 2015-08-27 | Samsung Electronics Co., Ltd. | Circuit board having bypass pad |
US20170265297A1 (en) * | 2016-03-09 | 2017-09-14 | Panasonic Liquid Crystal Display Co., Ltd. | Circuit board and display device |
US20180026088A1 (en) * | 2016-07-20 | 2018-01-25 | Samsung Display Co., Ltd. | Display apparatus |
US20200203235A1 (en) * | 2018-12-19 | 2020-06-25 | Samsung Electronics Co., Ltd. | Display module and manufacturing method of display module |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6856472B2 (ja) | 2017-07-31 | 2021-04-07 | 京セラ株式会社 | 表示装置 |
-
2021
- 2021-12-01 JP JP2022568216A patent/JP7478257B2/ja active Active
- 2021-12-01 WO PCT/JP2021/044085 patent/WO2022124157A1/ja active Application Filing
- 2021-12-01 US US18/265,793 patent/US20240038953A1/en active Pending
- 2021-12-01 CN CN202180081481.1A patent/CN116547736A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11183933A (ja) * | 1997-12-19 | 1999-07-09 | Toshiba Electronic Engineering Corp | 表示装置用アレイ基板 |
US20150243371A1 (en) * | 2007-12-12 | 2015-08-27 | Samsung Electronics Co., Ltd. | Circuit board having bypass pad |
US20170265297A1 (en) * | 2016-03-09 | 2017-09-14 | Panasonic Liquid Crystal Display Co., Ltd. | Circuit board and display device |
US20180026088A1 (en) * | 2016-07-20 | 2018-01-25 | Samsung Display Co., Ltd. | Display apparatus |
US20200203235A1 (en) * | 2018-12-19 | 2020-06-25 | Samsung Electronics Co., Ltd. | Display module and manufacturing method of display module |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI835553B (zh) * | 2023-02-09 | 2024-03-11 | 友達光電股份有限公司 | 電路基板及其製造方法 |
Also Published As
Publication number | Publication date |
---|---|
US20240038953A1 (en) | 2024-02-01 |
JP7478257B2 (ja) | 2024-05-02 |
CN116547736A (zh) | 2023-08-04 |
JPWO2022124157A1 (ja) | 2022-06-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2793536B1 (en) | Chip on film and display device having the same | |
US20070285370A1 (en) | Thin film transistor substrate and liquid crystal display panel having the same | |
US20080048948A1 (en) | Display device, flexible member, and method thereof | |
KR20090126052A (ko) | 박막 트랜지스터 기판 및 이를 표함하는 표시 장치 | |
CN103901641A (zh) | 用于显示装置的阵列基板 | |
US10964284B2 (en) | Electronic component board and display panel | |
JP2008070873A (ja) | 平板表示装置 | |
US8354672B2 (en) | Thin film transistor array panel | |
KR102654664B1 (ko) | 유기 발광 표시 장치 | |
US10325534B2 (en) | Display device | |
US10852571B2 (en) | Display module and method of testing the same | |
KR20150084127A (ko) | 표시 기판, 표시 기판의 제조 방법 및 이를 포함하는 표시 장치 | |
US8569766B2 (en) | Organic light-emitting display device and method of manufacturing the same | |
WO2020217959A1 (ja) | マイクロled素子基板および表示装置 | |
KR102050384B1 (ko) | 협 베젤 구조를 갖는 평판 표시 패널 | |
WO2022124157A1 (ja) | 表示装置 | |
CN112786657A (zh) | 透明显示面板及包括该透明显示面板的透明显示装置 | |
CN108169977A (zh) | 电泳装置以及电子设备 | |
US20130293524A1 (en) | Thin film transistor array panel and display device including the same | |
WO2021107145A1 (ja) | 表示装置 | |
US20110310343A1 (en) | Display device, method for manufacturing the same, and active matrix substrate | |
EP4203651A1 (en) | Electroluminescence display | |
US11749148B2 (en) | Display apparatus | |
KR20210085642A (ko) | 표시장치 | |
KR101682363B1 (ko) | 평판 표시장치 및 그의 제조 방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21903261 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022568216 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180081481.1 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18265793 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21903261 Country of ref document: EP Kind code of ref document: A1 |