CN112289839A - Display device - Google Patents
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- CN112289839A CN112289839A CN202011186753.8A CN202011186753A CN112289839A CN 112289839 A CN112289839 A CN 112289839A CN 202011186753 A CN202011186753 A CN 202011186753A CN 112289839 A CN112289839 A CN 112289839A
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- 239000010410 layer Substances 0.000 claims abstract description 132
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- 230000006870 function Effects 0.000 description 30
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
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- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Image Input (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention discloses a display device, which comprises: the display function layer comprises a thin film transistor array and a light-emitting device layer positioned on one side of the thin film transistor array; the light sensing device is arranged on one side of the thin film transistor array, which is far away from the light emitting device layer, and the light sensing device is positioned in the fingerprint identification area; the optical alignment structure layer is arranged between the light sensing device and the display functional layer; the optical alignment structure layer comprises an optical alignment structure, the optical alignment structure is arranged in the fingerprint identification area, and the optical alignment structure corresponds to the light sensing device in the thickness direction of the display device; the surface of one side of the optical alignment structure close to the display function layer comprises a micro-nano structure array. According to the display device provided by the embodiment of the invention, the light intensity irradiated by each thin film transistor channel in the display function layer is relatively consistent, the performance of the thin film transistors can be relatively consistent, the brightness of the light emitting devices can be relatively consistent, and the display uniformity of the display panel is further improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display device.
Background
With the development of display technology, the off-screen identification technology has become one of the main fingerprint identification technologies.
In the existing technology of fingerprint identification under a screen, light sensation fingerprint identification is a main implementation means. This technique relies on the local highlight that the display screen sent to transfer user's fingerprint information to the fingerprint light sensor who is located the display module assembly below, and the sensor is the light signal conversion who has fingerprint information and is the signal of telecommunication and discern.
However, the display device of the prior light-sensitive fingerprint identification has the problem of uneven display of the display panel.
Disclosure of Invention
The invention provides a display device, which is used for improving the display uniformity of a display panel and ensuring the good display effect of the display panel.
The embodiment of the invention provides a display device which is divided into a fingerprint identification area and a non-fingerprint identification area; the display device includes:
the display function layer comprises a thin film transistor array and a light-emitting device layer positioned on one side of the thin film transistor array;
the light sensing device is arranged on one side, far away from the light emitting device layer, of the thin film transistor array and is positioned in the fingerprint identification area;
the optical alignment structure layer is arranged between the light sensing device and the display function layer; the optical alignment structure layer comprises an optical alignment structure, the optical alignment structure is arranged in the fingerprint identification area, and in the thickness direction of the display device, the optical alignment structure corresponds to the light sensing device; the surface of the optical alignment structure close to the display function layer comprises a micro-nano structure array.
Optionally, the micro-nano structure array includes a plurality of protruding structures arranged in an array.
Optionally, the shape of the protruding structure is cylindrical, truncated cone, sphere, or ellipsoid.
Optionally, the display device further includes a substrate, and the display functional layer and the light-sensing device are disposed on opposite sides of the substrate;
the display device further comprises an adhesive layer, the adhesive layer is arranged on one side, far away from the display function layer, of the substrate, the adhesive layer is provided with an opening, the opening corresponds to the fingerprint identification area, and the optical alignment structure is arranged in the opening.
Optionally, the thickness of the optical alignment structure is equal to the thickness of the adhesive layer.
Optionally, the display device further includes a support layer, the support layer is located between the substrate and the adhesive layer, and the support layer is disposed in both the fingerprint identification area and the non-fingerprint identification area.
Optionally, the display device further includes a support layer, the support layer is located between the substrate and the adhesive layer, and the support layer is disposed in the non-fingerprint identification region.
Optionally, the refractive index of the optical collimating structure is greater than the refractive index of air.
Optionally, the substrate, the display function layer, the adhesive layer, and the optical alignment layer are included in a display panel of the display device, and the light sensing device is hung on the display panel.
Optionally, the display device further includes a substrate, the optical device is disposed between the display functional layer and the substrate, the display functional layer, the optical alignment layer, and the optical device are included in a display panel of the display device.
The embodiment of the invention provides a display device, which comprises: the display function layer comprises a thin film transistor array and a light-emitting device layer positioned on one side of the thin film transistor array; the light sensing device is arranged on one side of the thin film transistor array, which is far away from the light emitting device layer, and the light sensing device is positioned in the fingerprint identification area; the optical alignment structure layer is arranged between the light sensing device and the display functional layer; the optical alignment structure layer comprises an optical alignment structure, the optical alignment structure is arranged in the fingerprint identification area, and the optical alignment structure corresponds to the light sensing device in the thickness direction of the display device; the surface of one side of the optical alignment structure close to the display function layer comprises a micro-nano structure array. After the light reflected by the finger reaches the micro-nano structure array, multiple reflection and refraction occur on the surface of the micro-nano structure array, so that the light can reach the light sensing device through the optical alignment structure layer more, the sensitivity of the light sensing device is improved, and the fingerprint identification accuracy is improved. And, after the light that reflects through the finger reachs the optics collimation structure, the light that reflects to showing the functional layer then can reduce, then reflect to showing the light density of functional layer and reduce on fingerprint identification district unit area, and then reduce the light density difference that fingerprint identification district and non-fingerprint identification district reflect to the thin film transistor channel, make the light intensity that each thin film transistor channel is shone in the demonstration functional layer comparatively unanimous, then the performance of thin film transistor can comparatively unanimous, light emitting device's luminance can comparatively unanimous, and then improve display panel and show the homogeneity.
Drawings
Fig. 1 is a top view of a display device according to an embodiment of the present invention;
fig. 2 is a sectional view of a display device according to an embodiment of the present invention;
fig. 3 is a sectional view of another display device provided in an embodiment of the present invention;
fig. 4 is a sectional view of another display device provided in an embodiment of the present invention;
fig. 5 is a sectional view of another display device provided in an embodiment of the present invention;
fig. 6 is a sectional view of another display device provided in an embodiment of the present invention;
fig. 7 is a sectional view of another display device provided in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As described in the background art, the conventional display device with light sensing fingerprint identification has the problem of uneven display of the display panel. The inventors have found that the above problems occur because the conventional light-sensitive fingerprint identification display device generally includes a display functional layer for displaying, the display functional layer generally includes a pixel circuit for driving a light-emitting device to emit light, the pixel circuit includes a thin film transistor, and the performance of the thin film transistor affects the light-emitting performance of the light-emitting device. The display device further comprises an identification functional layer for fingerprint identification, wherein the identification functional layer typically comprises a light-sensitive device. Wherein the identification functional layer is generally disposed below the display functional layer, in the light-sensitive fingerprint identification display device, generally comprises a fingerprint identification area and a non-fingerprint identification area, a light sensation device in an identification functional layer is arranged in the fingerprint identification area, the non-fingerprint identification area does not need to be provided with a light sensing device, so that the structures of the identification functional layer of the display device and/or the nearby film layer of the identification functional layer are different, light rays are reflected to the identification functional layer or the nearby film layer of the identification functional layer through the fingerprint of a finger, the light is reflected again to different degrees, and generally, for the same film layer in the identification functional layer of the fingerprint identification area and the non-fingerprint identification area or the adjacent film layer of the identification functional layer, the quantity of the reflected light of the fingerprint identification area in unit area is higher than that of the reflected light of the non-fingerprint identification area, that is, the density of the reflected light of the fingerprint identification area is higher than that of the reflected light of the non-fingerprint identification area. After being reflected by the identification functional layer or a film layer near the identification functional layer, light rays may irradiate a channel region of the thin film transistor of the display functional layer, and because the density of the reflected light rays of the fingerprint identification region is higher than that of the reflected light rays of the non-fingerprint identification region, relative to the non-fingerprint identification region, the thin film transistor irradiated by the light rays reflected by the identification functional layer or a film layer adjacent to the identification functional layer in the fingerprint identification region is more likely to generate characteristic drift, and the thin film transistor directly influences the driving of a pixel circuit where the thin film transistor is located on a light emitting device after the characteristic drift is generated, so that the luminous performance of the light emitting device may be influenced, for example, the luminous brightness of the light emitting device may be influenced.
In view of the above problems, an embodiment of the present invention provides a display device, fig. 1 is a top view of the display device provided by the embodiment of the present invention, fig. 2 is a sectional view of the display device provided by the embodiment of the present invention, fig. 3 is a sectional view of another display device provided by the embodiment of the present invention, wherein fig. 2 and 3 are sectional views that can be taken along a section line B-B' corresponding to fig. 1, and referring to fig. 1-3, the display device is divided into a fingerprint identification area FA and a non-fingerprint identification area NFA; the display device includes:
a display function layer 110, the display function layer 110 including a thin film transistor array 111 and a light emitting device layer 112 on one side of the thin film transistor array 111;
the light sensing device 120 is arranged on one side of the thin film transistor array 111 far away from the light emitting device layer 112, and the light sensing device 120 is positioned in the fingerprint identification area FA;
an optical alignment structure layer 130 disposed between the light sensing device 120 and the display function layer 110; the optical collimating structure layer 130 includes an optical collimating structure 131, the optical collimating structure 131 is disposed in the fingerprint identification area FA, and in the thickness direction y of the display device, the optical collimating structure 131 corresponds to the light sensing device 120; the surface of the optical collimating structure 131 near the side of the display function layer 110 includes a micro-nano structure array.
Specifically, the display function layer 110 may be an organic light emitting diode display function layer, a liquid crystal display function layer, a quantum dot light emitting diode display function layer, a micro light emitting diode display function layer, or the like, and the present invention is not limited thereto. The display function layer 110 includes a thin film transistor array 111 and a light emitting device layer 112 on one side of the thin film transistor array 111, wherein the thin film transistor array 111 may include a plurality of pixel circuits, each of which may include at least two thin film transistors 1111 and may further include a capacitor. Taking the display function layer 110 as the organic light emitting diode display function layer 110 as an example for explanation, in this case, the light emitting device layer 112 included in the display function layer 110 is an organic light emitting diode device layer, the organic light emitting diode device layer may include a plurality of organic light emitting diodes, the light emitting luminance of the organic light emitting diodes is controlled by the pixel circuit in the thin film transistor array 111, and the pixel circuit controls the light emitting luminance of the organic light emitting diodes by controlling the magnitude of the current flowing into the organic light emitting diodes. The light emitting device layer 112 may include a first electrode, a hole injection layer, a hole transport layer, a light emitting material layer, an electron transport layer, an electron injection layer, and a second electrode, which may be an anode, disposed from bottom to top.
The display device further includes a light sensing device 120, the light sensing device 120 may be a fingerprint identification sensor, the light sensing device 120 is disposed on a layer of the thin film transistor array 111 away from the light emitting device layer 112, and the light sensing device 120 may be configured to sense light emitted by the light emitting device layer 112 after being reflected by a fingerprint, and convert a sensed light signal into an electrical signal. The display device can include the fingerprint identification chip, and photosensitive element can be with the signal of telecommunication transmission to the fingerprint identification chip after the conversion, and then realizes fingerprint identification.
The display device further includes an optical alignment structure layer 130, the optical alignment structure layer 130 includes an optical alignment structure 131, the optical alignment structure 131 is also disposed in the fingerprint identification area FA and corresponds to the light sensing device 120, and the surface of the optical alignment structure layer 130 close to the display function layer 110 includes a micro-nano structure array. The micro-nano structure array can comprise a periodic ordered structure or a random disordered structure. Optionally, the micro-nano structure array includes a plurality of protruding structures arranged in an array, and the plurality of protruding structures may be arranged in order periodically or in random disorder as described above. Optionally, the shape of the protruding structure is cylindrical, truncated cone, sphere, or ellipsoid. When the convex structure is spherical, the height of the convex structure can be equal to the radius of the ball, can be larger than the radius of the ball, or smaller than the radius of the ball, and is not limited to the regular hemispherical shape; when the convex structure is ellipsoidal, the convex structure can be semi-ellipsoidal or full-ellipsoidal; when the convex structure is in a semi-ellipsoid shape, the height of the convex structure can be equal to the long radius of the ellipsoid, can be larger than the long radius of the ellipsoid, or is smaller than the long radius of the ellipsoid; the height of the ellipsoid may be equal to the short radius of the ellipsoid, may be larger than the short radius of the ellipsoid, or smaller than the short radius of the ellipsoid, and is not limited to a regular semi-ellipsoid shape. Fig. 2 schematically shows a case where the convex structure is a cone-shaped structure, and fig. 3 schematically shows a case where the convex structure is a hemispherical structure.
The process of fingerprint identification of the display device may be that, the user places a finger in the fingerprint identification area FA of the display device, after the light emitted by the light emitting device layer 112 of the display device irradiates the finger, the light is reflected to the optical alignment structure layer 130 by the finger and reaches the surface of the optical alignment structure layer 130 close to the display function layer 110, the surface of the optical alignment structure layer 130 close to the display function layer 110 includes the micro-nano structure array, so that after the light reflected by the finger reaches the micro-nano structure array, multiple reflection and refraction occur on the surface of each convex structure, and then the light can reach the light sensing device 120 through the optical alignment structure layer 130 more, thereby being beneficial to improving the sensitivity of the light sensing device 120 and improving the accuracy of fingerprint identification. Moreover, because more light can reach the light sensing device 120 through the optical alignment structure layer 130, correspondingly, after the light reflected by the finger reaches the optical alignment structure 131, the light reflected to the display function layer 110 is reduced, the density of the light reflected to the display function layer on the unit area of the fingerprint identification area FA is reduced, and further the difference of the light reflected to the channels of the thin film transistors 1111 by the fingerprint identification area FA and the non-fingerprint identification area NFA is reduced, so that the intensity of the light irradiated by the channels of the thin film transistors 1111 in the display function layer 110 is relatively consistent, the performance of the thin film transistors 1111 can be relatively consistent, and further when the pixel circuit drives the light emitting device, the brightness of the light emitting device can be relatively consistent, and the display uniformity of the display panel is improved.
It should be noted that fig. 1 only illustrates that a specific area of the display device is the fingerprint identification area FA, and other areas are the non-fingerprint identification areas NFA, the display device may further include a plurality of fingerprint identification areas FA, and correspondingly, the display device may include a plurality of light sensing devices 120, which is not limited in this embodiment.
The display device provided by the embodiment comprises the following components by setting: the display function layer comprises a thin film transistor array and a light-emitting device layer positioned on one side of the thin film transistor array; the light sensing device is arranged on one side of the thin film transistor array, which is far away from the light emitting device layer, and the light sensing device is positioned in the fingerprint identification area; the optical alignment structure layer is arranged between the light sensing device and the display functional layer; the optical alignment structure layer comprises an optical alignment structure, the optical alignment structure is arranged in the fingerprint identification area, and the optical alignment structure corresponds to the light sensing device in the thickness direction of the display device; the surface of one side of the optical alignment structure close to the display function layer comprises a micro-nano structure array. After the light reflected by the finger reaches the micro-nano structure array, multiple reflection and refraction occur on the surface of the micro-nano structure array, so that the light can reach the light sensing device through the optical alignment structure layer more, the sensitivity of the light sensing device is improved, and the fingerprint identification accuracy is improved. And, after the light that reflects through the finger reachs the optics collimation structure, the light that reflects to showing the functional layer then can reduce, then reflect to showing the light density of functional layer and reduce on fingerprint identification district unit area, and then reduce the light density difference that fingerprint identification district and non-fingerprint identification district reflect to the thin film transistor channel, make the light intensity that each thin film transistor channel is shone in the demonstration functional layer comparatively unanimous, then the performance of thin film transistor can comparatively unanimous, light emitting device's luminance can comparatively unanimous, and then improve display panel and show the homogeneity.
Fig. 4 is a cross-sectional view of another display device provided by an embodiment of the present invention, and referring to fig. 4, the display device further includes a substrate 140, and the display functional layer 110 and the light-sensing device 120 are disposed on opposite sides of the substrate 140;
the display device further comprises an adhesive layer 150, the adhesive layer 150 being arranged on a side of the substrate 140 facing away from the display functional layer 110, the adhesive layer 150 being provided with openings, which correspond to the fingerprint recognition areas FA, in which the optical collimating structures 131 are arranged.
Specifically, when the display function layer 110 and the light sensing device 120 are disposed on the opposite side of the substrate 140, the display device may include a display panel and a fingerprint identification module, wherein the light sensing device 120 does not belong to the display panel, but belongs to the fingerprint identification module. The display device comprises an adhesive layer 150, and the fingerprint identification module can be combined with the display panel through the adhesive layer 150. Optionally, the adhesive layer 150 is an opaque film layer, for example, the adhesive layer 150 may be a composite tape, and the optical collimating structure 131 is a transparent film layer, so that light reflected by a finger cannot pass through the adhesive layer 150 but only reaches the light sensing device 120 through the optical collimating structure 131, which is beneficial to improving the fingerprint identification accuracy. In the conventional display device, there is generally no structure provided at the opening position of the adhesive layer 150, and the opening region can be considered to be filled with air, so that light reflected by a finger reaches the region where no opening is provided in the adhesive layer 150 (i.e., the non-fingerprint identification region NFA) and the region where an opening is provided in the adhesive layer 150 (i.e., the fingerprint identification region FA), and is reflected again toward the display functional layer 110 by the material of the adhesive layer 150 and the air, respectively, because the opaque film layers are collectively referred to as black and have a light absorption effect, when reaching the material surface of the adhesive layer 150, the light reflected toward the display functional layer 110 is less; when the light reaches the air at the opening of the adhesive layer 150, the light emitted to the display functional layer 110 is more, so that the display is not uniform. The display device of this embodiment is different from the conventional display device in structure, in which an optical device structure is disposed at the opening of the adhesive layer 150, so that light can be transmitted to the light sensing device 120 more after reaching the optical collimating structure 131, and reflection at the opening of the adhesive layer 150 is reduced.
Optionally, the refractive index of the optical collimating structure 131 is greater than the refractive index of air. Specifically, for the conventional display device, since the opening of the adhesive layer 150 can be considered as air filling, and the refractive index of the substrate 140 is generally greater than that of air, when light reflected by a finger enters air from the substrate 140, the light is transmitted from the optically dense medium to the optically sparse medium, so that total reflection easily occurs, and more light is reflected to the display functional layer 110 through air. In this embodiment, the refractive index of the optical collimating structure 131 is greater than the refractive index of air, as can be seen from the display device shown in fig. 4, when a gap is included between adjacent protruding structures, light reflected by a finger passes through the substrate 140, and a part of the light directly enters the optical collimating structure 131, the refractive index of the optical collimating structure is greater than the refractive index of air, so that the critical angle of total reflection can be increased, and further, the occurrence of total reflection is reduced, and further, the number of light reflected to the display functional layer 110 in the fingerprint identification area FA is reduced, and the display uniformity of the display panel is improved.
Optionally, on the basis of the above technical solution, the convex structures are uniformly arranged, so that the light reflected by the finger can be more directly incident on the optical collimating structure 131 and less incident on the air after passing through the substrate 140, and the critical angle at which the light directly enters the optical collimating structure 131 from the substrate 140 is larger than that at which the light directly enters the air from the substrate 140, thereby further reducing the occurrence of total reflection.
With continued reference to fig. 4, optionally, the thickness h2 of the optical collimating structure 131 is equal to the thickness h1 of the adhesive layer 150, so that the flatness of the display device can be improved. Wherein the thickness h2 of the optical collimating structure 131 may refer to the largest dimension of the optical collimating structure 131 in the thickness direction y of the display panel.
Fig. 5 is a cross-sectional view of another display device provided by an embodiment of the present invention, and referring to fig. 5, the display device further includes a support layer 160, wherein the support layer 160 is disposed between the substrate 140 and the adhesive layer 150, and the support layer 160 is disposed in both the fingerprint identification area FA and the non-fingerprint identification area NFA.
Specifically, the supporting layer 160 may be made of a material with high mechanical strength, so as to ensure the supporting effect on the display panel. The supporting layer 160 of the present embodiment may be a light-transmitting material, such as PMMA acrylic material. In practical use, the user can select the material of the supporting layer 160 according to the requirement, which is not limited in this embodiment. And, supporting layer 160 can alleviate the extrusion stress when fingerprint identification module and display panel laminating, the damage of fingerprint identification module or display panel that causes when avoiding display device to assemble. Optionally, a buffer layer may be further included between the support layer 160 and the adhesive layer 150 to further buffer compressive stress during assembly of the display device.
Fig. 6 is a cross-sectional view of another display device provided by an embodiment of the invention, and referring to fig. 6, the display device further includes a support layer 160, the support layer 160 is disposed between the substrate 140 and the adhesive layer 150, and the support layer 160 is disposed in the non-fingerprint identification region NFA.
Unlike the display device shown in fig. 5, in the display device of the present embodiment, the supporting layer 160 is only disposed in the non-fingerprint identification region NFA, and the supporting layer 160 is not disposed in the fingerprint identification region FA. For the display device structure shown in fig. 6, the optical collimating structure 131 may serve as the supporting layer 160 in the fingerprint identification area FA. Compared with the display device shown in fig. 5, in the display device of this embodiment, the interface between the substrate 140 and the supporting layer 160 can be reduced in the fingerprint identification area FA, so that the light reflected by the finger directly enters the optical collimating structure 131 after passing through the substrate 140, and then the interface reflection between the substrate 140 and the supporting layer 160 can be reduced, which is beneficial to further reducing the light reflected to the thin film transistor 1111 of the display functional layer 110, and further beneficial to further improving the display uniformity. Moreover, since the interface reflection is reduced, the light reaching the light sensing device 120 is increased, which is further beneficial to further improving the accuracy of fingerprint identification.
With continued reference to fig. 6, the thickness h2 of the optical collimating structure 131 is equal to the sum of the thickness h1 of the adhesive layer 150 and the thickness h3 of the support layer 160. Since the support layer 160 is not disposed in the fingerprint identification area FA for the display device shown in fig. 6, it is advantageous to dispose the thickness h2 of the optical collimating structure 131 equal to the sum of the thickness h1 of the adhesive layer 150 and the thickness h3 of the support layer 160 to improve the flatness of the display device.
Optionally, for the display device shown in fig. 2 to 6 in the above embodiment of the present invention, optionally, the substrate 140, the display functional layer 110, the adhesive layer 150, and the optical alignment structure layer 130 are included in a display panel of the display device, and the light sensing device 120 is externally hung on the display panel; therefore, when the display panel is manufactured, the existing process steps are not required to be changed, and the manufacturing process of the display panel is simplified.
Referring to fig. 7, optionally, the display device further includes a substrate 140, the light-sensing device 120 is disposed between the display functional layer 110 and the substrate 140, the display functional layer 110, the optical alignment structure layer 130, and the light-sensing device 120 are included in the display panel of the display device.
In this embodiment, the optical alignment structure layer 130, the light sensing device 120, the substrate 140, and the display function layer 110 are all included in the display panel of the display device, that is, the light sensing device 120 and the optical alignment structure layer 130 are formed in the manufacturing process of the display panel, so that the bonding and fixing process with the external fingerprint identification module after the display panel is manufactured can be reduced, and the damage to the display device caused by the bonding of the surface display panel and the external fingerprint identification module can be avoided. For example, the light sensing device 120 may be a photodiode; on both sides of the light sensing device 120 and the optical collimating structure 131, an insulating material may be provided.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A display device is characterized by being divided into a fingerprint identification area and a non-fingerprint identification area; the display device includes:
the display function layer comprises a thin film transistor array and a light-emitting device layer positioned on one side of the thin film transistor array;
the light sensing device is arranged on one side, far away from the light emitting device layer, of the thin film transistor array and is positioned in the fingerprint identification area;
the optical alignment structure layer is arranged between the light sensing device and the display function layer; the optical alignment structure layer comprises an optical alignment structure, the optical alignment structure is arranged in the fingerprint identification area, and in the thickness direction of the display device, the optical alignment structure corresponds to the light sensing device; the surface of the optical alignment structure close to the display function layer comprises a micro-nano structure array.
2. The display device according to claim 1, wherein the micro-nanostructure array comprises a plurality of protruding structures arranged in an array.
3. The display device according to claim 2, wherein the protruding structures have a cylindrical, truncated cone, pyramidal, spherical, or ellipsoidal shape.
4. The display device according to claim 1, further comprising a substrate, wherein the display functional layer and the light-sensing device are disposed on opposite sides of the substrate;
the display device further comprises an adhesive layer, the adhesive layer is arranged on one side, far away from the display function layer, of the substrate, the adhesive layer is provided with an opening, the opening corresponds to the fingerprint identification area, and the optical alignment structure is arranged in the opening.
5. A display device as claimed in claim 4, characterized in that the thickness of the optical collimating structure is equal to the thickness of the adhesive layer.
6. The display device according to claim 4, further comprising a support layer between the substrate and the adhesive layer, wherein a support layer is disposed in both the fingerprint identification region and the non-fingerprint identification region.
7. The display device of claim 4, further comprising a support layer positioned between the substrate and the adhesive layer, the support layer being disposed in the non-fingerprint identification region.
8. A display device as claimed in claim 4, characterized in that the refractive index of the optical collimating structure is larger than the refractive index of air.
9. The display device of claim 4, wherein the substrate, the display functional layer, the adhesive layer, and the optical alignment layer are included in a display panel of the display device, the light-sensing device being externally hung from the display panel.
10. The display device according to claim 1, further comprising a substrate, wherein the optical device is disposed between the display functional layer and the substrate, and wherein the substrate, the display functional layer, the optical alignment layer, and the optical device are included in a display panel of the display device.
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| CN202011186753.8A CN112289839A (en) | 2020-10-29 | 2020-10-29 | Display device |
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|---|---|---|---|---|
| CN112767841A (en) * | 2021-02-05 | 2021-05-07 | 昆山国显光电有限公司 | Display panel and display device |
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