CN111599938B - Display panel and display device - Google Patents
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- CN111599938B CN111599938B CN202010451480.9A CN202010451480A CN111599938B CN 111599938 B CN111599938 B CN 111599938B CN 202010451480 A CN202010451480 A CN 202010451480A CN 111599938 B CN111599938 B CN 111599938B
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
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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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
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Abstract
The embodiment of the invention discloses a display panel and a display device.A sub-pixel with at least one luminous color comprises two or more luminous units with corresponding colors; the sub-pixels of other light-emitting colors comprise at least one light-emitting unit of a corresponding color; the size difference of the light-emitting units of any color and the size difference of the light-emitting units of other colors in the set direction are smaller than or equal to the set size, so that the size difference of different light-emitting colors in any direction is smaller, the change difference of the area proportion of the light-emitting units of different light-emitting colors sheltered by the black matrix is smaller along with the change of the viewing angle of a screen watched by a user, the brightness attenuation proportion of the light-emitting units of different colors is more consistent along with the change of the viewing angle, the brightness attenuation proportion of the sub-pixels of different colors is more consistent along with the change of the viewing angle, and the color cast of a large viewing angle is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.
Background
With the development of display technology, organic light emitting display panels are widely used with their advantages of high brightness, wide viewing angle, and low power consumption.
The conventional organic light emitting display panel generally comprises a circular polarizer structure, which is used for eliminating the reflection of a metal layer in the display panel to external light, but the circular polarizer structure has the problems of low transmittance, influence on module power consumption and the like. A BM (Black Matrix) + CF (Color Filter) structure may be used as an alternative structure of the circular polarizer.
However, the display panel including the BM + CF structure has a problem of color shift at a large viewing angle.
Disclosure of Invention
The invention provides a display panel and a display device, which aim to solve the problem of large-viewing-angle color cast of the display panel and the display device.
In a first aspect, an embodiment of the present invention provides a display panel, including:
a substrate;
the sub-pixels with different light-emitting colors are arranged on one side of the substrate, wherein at least one sub-pixel with the light-emitting color comprises two or more light-emitting units with corresponding colors; the sub-pixels of other light-emitting colors comprise at least one light-emitting unit of a corresponding color; the size difference of the light-emitting unit of any color and the light-emitting units of other colors in the set direction is smaller than or equal to the set size, and the set direction is any direction;
the color filter layer arranged on one side, far away from the substrate, of the sub-pixel comprises a black matrix, the black matrix comprises an opening, filter units are arranged in the opening, and the filter units correspond to the light-emitting units one to one in the thickness direction of the display panel.
Alternatively, the set size is 15% of the size of the light emitting unit having the smallest area among the light emitting units in the set direction.
Optionally, the display panel at least includes a first color sub-pixel, a second color sub-pixel and a third color sub-pixel;
at least the first color sub-pixel comprises two or more first color light emitting units; the service life of the first color light-emitting unit is shorter than that of any other color light-emitting unit.
Optionally, the second color sub-pixel includes two or more second color light emitting units, the service life of the second color light emitting unit is longer than that of the first color light emitting unit, and the number of the second color light emitting units included in the second color sub-pixel is less than or equal to that of the first color light emitting units included in the first color sub-pixel.
Optionally, the third color sub-pixel includes at least one third color light emitting unit, the service life of the third color light emitting unit is longer than that of the second color light emitting unit, and the number of the third color light emitting units included in the third color sub-pixel is less than or equal to that of the second color light emitting units included in the second color sub-pixel;
optionally, the third color sub-pixel comprises a third color light emitting unit.
Optionally, the second color sub-pixel includes a second color light emitting unit, and the third color sub-pixel includes a third color light emitting unit.
Optionally, the first vertical projection of the light emitting unit on the substrate falls within the second vertical projection range of the corresponding filter unit on the substrate.
Optionally, the shape of a first vertical projection of the light emitting unit on the substrate is the same as the shape of a second vertical projection of the light filtering unit corresponding to the light emitting unit on the substrate;
in any direction, the distance between the corresponding sides of the first vertical projection and the second vertical projection is greater than 0 and less than or equal to 10 μm.
Optionally, the shape of each light emitting unit is the same.
Optionally, the size difference in the set direction between the light-emitting unit of any color and the light-emitting units of other colors is equal to 0.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel provided in the first aspect.
In the display panel and the display device provided by the embodiment, the sub-pixel of at least one light-emitting color comprises two or more light-emitting units of corresponding colors; the sub-pixels of other light-emitting colors comprise at least one light-emitting unit of a corresponding color; the size difference of the light-emitting units of any color and the light-emitting units of other colors in the set direction is smaller than or equal to the set size, the set direction is any direction, the size difference of different light-emitting colors in any direction is smaller, the change of the area proportion of the light-emitting units of different light-emitting colors sheltered by the black matrix is smaller along with the change of the viewing angle of a screen watched by a user, the brightness attenuation proportion of the light-emitting units of different colors along with the change of the viewing angle is more consistent, the brightness attenuation proportion of the sub-pixels of different colors along with the change of the viewing angle is more consistent finally, the white light under the front viewing angle is still closer to the white light under the large viewing angle, and the color cast of the large viewing angle is improved.
Drawings
FIG. 1 is a graph illustrating the luminance decay rate of red and blue sub-pixels as a function of viewing angle;
FIG. 2 is a top view of a display panel according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along A-A' of FIG. 2;
FIG. 4 is a cross-sectional view of a prior art display panel;
FIG. 5 is a top view of another display panel provided in accordance with an embodiment of the present invention;
FIG. 6 is a top view of another display panel according to an embodiment of the present invention;
FIG. 7 is a top view of another display panel provided in accordance with an embodiment of the present invention;
FIG. 8 is a cross-sectional view of FIG. 7 taken along line C-C';
fig. 9 is a schematic structural diagram of a display device according to 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 display panel including the BM + CF structure has a problem of large viewing angle color shift. The inventor has found that the above problem occurs because the conventional display panel generally includes light-emitting units of multiple colors, each of which is used as a sub-pixel, and the sizes of the light-emitting units of different light-emitting colors in the same direction may have large differences. For example, in the case of a display panel including red, green, and blue light-emitting units, since the lifetime of the blue light-emitting unit is short, the size of the blue light-emitting unit in a certain direction or in certain directions is generally larger than the sizes of the red and green light-emitting units. Taking the shape of each light-emitting unit as a rectangle as an example, the size of the blue sub-pixel is larger than the sizes of the red sub-pixel and the green sub-pixel in the length direction and/or the width direction of the rectangle. In the display panel, the BM + CF structure usually includes a plurality of color filter units, wherein the filter units completely correspond to the light emitting units, so that when the viewing angle (the angle formed by the line of sight and the vertical direction of the light-emitting surface of the display panel) changes, the ratio of the areas of the sub-pixels with different colors, which are blocked by the BM, is different (i.e., the ratio of the area of the sub-pixels, in which the light emitted from the sub-pixels is blocked by the BM and cannot enter human eyes, to the area of the whole sub-pixels) in the direction in which the size is different, resulting in color cast. Fig. 1 is a graph illustrating the luminance decay ratio of the red and blue sub-pixels as a function of viewing angle, wherein fig. 1 exemplarily shows curves R-1, R-2, R-3, and R-4 corresponding to four red sub-pixels and curves B-1, B-2, B-3, and B-4 corresponding to four blue sub-pixels. Taking curve R-1 and curve B-1 as an example, as the viewing angle increases, the area ratio of the blocked red sub-pixel and blue sub-pixel changes (the size of the red sub-pixel is smaller than that of the blue sub-pixel, so that the area ratio of the blocked red sub-pixel by BM increases faster as the viewing angle increases, and the area ratio of the blocked blue sub-pixel by BM increases slower as the viewing angle increases), and the brightness attenuation ratio of the sub-pixel is directly related to the area ratio of the sub-pixel blocked by BM, so that the brightness attenuation ratio of the red sub-pixel and the blue sub-pixel is different as the viewing angle changes (the brightness attenuation ratio of the red sub-pixel is greater than that of the blue sub-pixel), which is shown as different slopes of two lines in fig. 1, so that the white light under the normal viewing angle may be biased toward the color of the sub-pixel with slower brightness attenuation (which is more blue than that in the case shown in fig. 1), causing color cast to occur.
In view of the above problems, an embodiment of the present invention provides a display panel, fig. 2 is a top view of the display panel provided by the embodiment of the present invention, fig. 3 is a cross-sectional view of fig. 2 taken along a-a', and referring to fig. 2 and 3, the display panel includes:
a substrate 110;
sub-pixels with different light-emitting colors arranged on one side of the substrate 110, wherein at least one sub-pixel with one light-emitting color comprises two or more light-emitting units with corresponding colors; the sub-pixels of other light-emitting colors comprise at least one light-emitting unit of a corresponding color; the size difference of the light-emitting unit of any color and the light-emitting units of other colors in the set direction is smaller than or equal to the set size, and the set direction is any direction;
the color filter layer disposed on a side of the sub-pixel away from the substrate 110 includes a black matrix 130, the black matrix 130 includes an opening 131, a filter unit is disposed in the opening 131, and the filter unit and the light emitting unit are in one-to-one correspondence in a thickness direction y of the display panel.
In particular, the substrate 110 may provide cushioning, protection, or support for the display panel. The substrate 110 may be a flexible substrate, and the material of the flexible substrate may be Polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), or the like, or may be a mixture of the foregoing materials. The substrate 110 may be a hard substrate formed of glass or the like.
A case where the display panel includes sub-pixels of three emission colors, illustratively, corresponding to red, green and blue sub-pixels 121, 122 and 123 emitting red, green and blue light, respectively, is exemplarily shown in fig. 2 and 3. The sub-pixels include light-emitting units of corresponding colors, i.e. a sub-pixel of a certain color includes a light-emitting unit of the color, for example, the red sub-pixel 121 includes a red light-emitting unit 1211, the green sub-pixel 122 includes a green light-emitting unit 1221, and the blue sub-pixel 123 includes a blue light-emitting unit 1231.
Referring to fig. 3, the display panel further includes a color filter layer, and the color filter layer includes a black matrix 130 for absorbing light reflected by metal in the display panel, so as to avoid the influence of the metal reflected light on the display effect in the display panel. Specifically, the display panel generally includes anodes and cathodes 140, wherein the anodes correspond to the light emitting units one by one, the cathodes 140 are generally in a whole layer structure, and each light emitting unit, the cathode 140 and the anode corresponding to the light emitting unit form a light emitting device. Fig. 2 illustrates the display panel as a top-emission display panel, in which the cathode 140 is located between the light-emitting units and the color filter layers, so that external natural light is usually reflected at the cathode 140 after entering the display panel, and the arrangement of the black matrix 130 can prevent the external natural light reflected by the cathode 140 from exiting the display panel, thereby being beneficial to ensuring a better display effect. Optionally, in the thickness direction of the display panel, the black matrix 130 and the light emitting unit are not overlapped, so as to ensure that the arrangement of the black matrix 130 can block the light emitted by the light emitting unit as little as possible.
The black matrix 130 includes a plurality of openings 131, and a filter unit is disposed in the openings 131. In the process of manufacturing the color filter layer, the entire black matrix 130 material may be first manufactured, then the opening 131 is opened in the entire black matrix 130 material by using a photolithography process, and finally the material of the filter unit is filled in the opening 131. The filter units correspond to the light emitting units one to one, and optionally, similar to the light emitting units, the filter units are also divided into a plurality of types, such as a red filter unit 141, a green filter unit 142, and a blue filter unit 143. In the aspect of position setting, the light filtering units correspond to the light emitting units one by one and are used for filtering light rays emitted by the corresponding units. For example, the red filter unit 141 is disposed above the red sub-pixel 121, the green filter unit 142 is disposed above the green sub-pixel 122, and the blue filter unit 143 is disposed above the blue sub-pixel 123, but the sizes and shapes of the filter units and the sub-pixels may be the same or different, and this embodiment is not limited in this respect.
Fig. 2 exemplarily shows a case where the red subpixel 121 includes one red light-emitting unit 1211, the green subpixel 122 includes one green light-emitting unit 1221, and the blue subpixel 123 includes two blue light-emitting units 1231. As described in the analysis of the related art, in the related art, the sub-pixels of different emission colors may have different sizes due to different emission lifetimes, and in the present embodiment, by setting at least one emission color sub-pixel to include two or more light-emitting units, and setting the size difference in the set direction between the light-emitting unit of any one color and the light-emitting unit of the other color to be smaller than or equal to the set size, that is, by making the size difference of the light-emitting units themselves of the respective colors smaller, a larger size of the sub-pixels is achieved by setting the sub-pixels to include a relatively large number of light-emitting units. The size difference of the light-emitting units with any color and the light-emitting units with other colors in the set direction is smaller than or equal to the set size, the set direction is in any direction, and therefore it is guaranteed that the size difference of different light-emitting colors in any direction is smaller, and further the change of the screen viewing angle is observed along with a user, the change difference of the area proportion of the light-emitting units with different light-emitting colors, which are shielded by the black matrix 130, is smaller, the brightness attenuation proportion of the light-emitting units with different colors is directly related to the area proportion of the light-emitting units shielded by the black matrix 130, so that the brightness attenuation proportion of the light-emitting units with different colors is more consistent along with the viewing angle, and finally the brightness attenuation proportion of the sub-pixels with different colors is more consistent along with the viewing angle, so that the white light under the front viewing angle can still be closer to the white light under the large viewing angle, and the color cast of the large viewing angle is improved.
Fig. 4 is a cross-sectional view of a display panel in the prior art, comparing the structure of the display panel in fig. 3 in this embodiment with the structure of the display panel in the prior art in fig. 4, and for the display panel in the prior art and this embodiment, the ratio of the red sub-pixel 121, the green sub-pixel 122, and the blue sub-pixel 123 that are blocked by the black matrix 130 is 0 in the front viewing angle, at this time, the red light, the green light, and the blue light can be mixed to obtain standard white light in the front viewing angle. When the viewing angle is θ, for the prior art display panel shown in fig. 4, the light emitted from the red sub-pixel 121 and the light emitted from the green sub-pixel 122 are both blocked by the black matrix 130, that is, for the red sub-pixel 121 and the green sub-pixel 122, when the viewing angle is θ, the area ratio of the sub-pixels blocked by the black matrix 130 is 100%; for the blue sub-pixel 123, the light emitted from the leftmost portion of the blue sub-pixel 123 is not blocked by the black matrix 130, that is, when the viewing angle is θ, the area ratio of the blue sub-pixel 123 blocked by the black matrix 130 is less than 100%, so that as the viewing angle of the screen viewed by a user changes, the change of the area ratio of the light emitting units of different light emitting colors blocked by the black matrix 130 is different, resulting in color cast at a large viewing angle. Fig. 3 illustrates that the red sub-pixel 121, the green sub-pixel 122, and the blue sub-pixel 123 have equal dimensions in the direction cut through in fig. 2, and it can be seen from fig. 3 that, when the viewing angle is θ, the light beams at the leftmost parts of the red sub-pixel 121, the green sub-pixel 122, and the blue sub-pixel 123 can be received by human eyes, so that the changes of the area ratios of the light-emitting units of different light-emitting colors, which are shielded by the black matrix 130, are more consistent with the changes of the viewing angle of the screen viewed by the user, and further, compared with the prior art structure in fig. 4, the color cast phenomenon can be improved.
It should be noted that fig. 3 only illustrates that the red sub-pixel 121, the green sub-pixel 122, and the blue sub-pixel 123 have the same size in the direction cut away in fig. 2, and it is not difficult to understand through the above analysis that the size difference between the light-emitting unit of any color and the light-emitting unit of other color in the set direction is smaller than or equal to the set size, so that the difference of the change of the area ratio of the light-emitting unit of different light-emitting color shielded by the black matrix 130 is smaller with the change of the viewing angle of the screen viewed by the user, and the color shift can be improved to a certain extent.
Optionally, the set direction may be each direction on a plane parallel to the light-emitting surface of the display panel, so that it can be ensured that in each direction, the size difference between the light-emitting unit of any color and the light-emitting units of other colors is smaller than or equal to the set size, and thus, the color cast is smaller when the display user views the screen in any direction.
Alternatively, the set size is 15% of the size of the light-emitting unit having the smallest area among the light-emitting units in the set direction. Specifically, the set size is 15% of the size of the light-emitting unit having the smallest area (which may refer to the area of the vertical projection of the light-emitting unit on the substrate 110) among the light-emitting units in the set direction, further, it can be ensured that the size difference of different light emitting colors is small in any direction, so that the change difference of the area ratio of the light emitting units of different light emitting colors shielded by the black matrix 130 is small with the change of the viewing angle of the screen viewed by the user, since the brightness attenuation ratio of the light emitting units is directly related to the area ratio of the light emitting units shielded by the black matrix 130, thereby the brightness attenuation ratios of the light-emitting units with different colors are more consistent with the change of the visual angle, and finally the brightness attenuation ratios of the sub-pixels with different colors are more consistent with the change of the visual angle, therefore, the white light under the front viewing angle can be still closer to the white light under the large viewing angle, and the color cast of the large viewing angle is improved.
In the display panel provided by the embodiment, the sub-pixel with at least one light-emitting color comprises two or more light-emitting units with corresponding colors; the sub-pixels of other light-emitting colors comprise at least one light-emitting unit of a corresponding color; the size difference of the light-emitting units of any color and the light-emitting units of other colors in the set direction is smaller than or equal to the set size, the set direction is any direction, the size difference of different light-emitting colors in any direction is smaller, the change of the area proportion of the light-emitting units of different light-emitting colors sheltered by the black matrix is smaller along with the change of the viewing angle of a screen watched by a user, the brightness attenuation proportion of the light-emitting units of different colors along with the change of the viewing angle is more consistent, the brightness attenuation proportion of the sub-pixels of different colors along with the change of the viewing angle is more consistent finally, the white light under the front viewing angle is still closer to the white light under the large viewing angle, and the color cast of the large viewing angle is improved.
With continued reference to fig. 2, optionally, the display panel includes at least a first color sub-pixel 123, a second color sub-pixel 122, and a third color sub-pixel 121;
at least the first color sub-pixel 123 includes two or more first color light emitting units 1231; the lifetime of the first color light emitting unit 1231 is shorter than the lifetimes of the other arbitrary color light emitting units.
Alternatively, the first color sub-pixel 123 may be a blue sub-pixel, the second color sub-pixel 122 may be a green sub-pixel, and the third color sub-pixel 121 may be a red sub-pixel, wherein the lifetime of the blue light emitting unit is shorter than the lifetimes of both the red light emitting unit and the green light emitting unit. Therefore, the blue sub-pixel can be arranged to comprise two or more blue light-emitting units, so that the blue sub-pixel is ensured to have a larger area, the service life of the blue sub-pixel can be closer to that of the red sub-pixel and the green sub-pixel, the service life of the display panel is prolonged, and the color cast can be improved.
It should be noted that fig. 2 and fig. 3 are schematically illustrated by taking only one pixel in the display panel as an example, where the arrangement of the sub-pixels in the pixel is not limited to the arrangement form illustrated in fig. 2 as long as at least the first color sub-pixel 123 includes two or more first color light emitting units 1231.
With continued reference to fig. 2, optionally, the second color sub-pixel 122 includes a second color light emitting unit 1221, and the third color sub-pixel 121 includes a third color light emitting unit 1211.
Specifically, the second color sub-pixel 122 includes a second color light-emitting unit 1221, and the third color sub-pixel 121 includes a third color light-emitting unit 1211, so that the number of light-emitting units in the display panel can be further reduced, and the manufacturing process of the display panel is further simplified.
Fig. 5 is a top view of another display panel according to an embodiment of the present invention, and referring to fig. 5, optionally, the second color sub-pixel 122 includes two or more second color light emitting units 1221, the service life of the second color light emitting units 1221 is longer than that of the first color light emitting units 1231, and the number of the second color light emitting units 1221 included in the second color sub-pixel 122 is less than or equal to the number of the first color light emitting units 1231 included in the first color sub-pixel 123.
Fig. 5 exemplarily shows a case where the second-color sub-pixel 122 includes two second-color light-emitting units 1221, the first-color sub-pixel 123 includes three first-color light-emitting units 1231, and the third-color sub-pixel 121 includes one third-color light-emitting unit 1211. In this embodiment, by setting that the second color sub-pixel 122 includes two or more second color light-emitting units 1221, the lifetime of the second color light-emitting units 1221 is longer than that of the first color light-emitting units 1231, the number of the second color light-emitting units 1221 included in the second color sub-pixel 122 is less than or equal to that of the first color light-emitting units 1231 included in the first color sub-pixel 123, so that the different color sub-pixels are further finely divided into different numbers of light-emitting units, and thus it is more advantageous to reduce the size of the individual light emitting cells, since the set size is equal to 15% of the size of the light emitting cell having the smallest area among the light emitting cells in the set direction, so that the reduction in size of the individual light emitting cells can allow the set size to be reduced, further reducing the size difference of each light-emitting unit, and further being more beneficial to improving the color cast phenomenon.
Fig. 6 is a top view of another display panel according to an embodiment of the present invention, referring to fig. 5 and fig. 6, the third color sub-pixel 121 includes at least one third color light emitting unit 1211, the lifetime of the third color light emitting unit 1211 is longer than the lifetime of the second color light emitting unit 1221, and the number of the third color light emitting units 1211 included in the third color sub-pixel 121 is less than or equal to the number of the second color light emitting units 1221 included in the second color sub-pixel 122.
Because the service lives of the light-emitting units with different light-emitting colors are not completely the same, the sub-pixels with different colors including the light-emitting units with different numbers can be arranged according to the service lives of the light-emitting units with different light-emitting colors, and the influence of the service lives of the light-emitting units on the display effect is compensated as much as possible while the dimension difference of the light-emitting units in any direction is smaller than the set dimension. Specifically, the shorter the lifetime of the light-emitting unit of a certain color is, the greater the number of light-emitting units included in the sub-pixel for setting the emission color is.
Optionally, the third color sub-pixel 121 includes a third color light emitting unit 1211. With reference to fig. 2, optionally, the display panel further includes a pixel defining layer 140, where the pixel defining layer 140 includes a plurality of pixel openings, and the light emitting units are formed in the pixel openings by evaporating a light emitting material, so that the formation of the light emitting units is complicated. In this embodiment, the third color sub-pixel 121 includes a third color light emitting unit 1211, which is beneficial to reducing the number of light emitting units while improving the color shift, thereby simplifying the manufacturing process of the display panel.
The above embodiments have exemplified that the shape of the projection of the light emitting unit on the substrate is a circle, and the shape of the vertical projection of the light emitting unit on the substrate may also be other shapes, such as an equilateral polygon or a rectangle, and the embodiments of the present invention are not limited specifically herein.
Fig. 7 is a top view of another display panel according to an embodiment of the present invention, and fig. 8 is a cross-sectional view of fig. 7 taken along C-C', and referring to fig. 7 and 8, alternatively, a first vertical projection of a light emitting unit on a substrate 110 falls within a second vertical projection range of a corresponding filtering unit on the substrate.
Optionally, the vertical projection of the first color light emitting unit 1231 on the substrate 110 falls within the vertical projection range of the first color filter unit on the substrate 110, the vertical projection of the second color light emitting unit 1221 on the substrate 110 falls within the vertical projection range of the second color filter unit on the substrate 110, and the vertical projection of the third color light emitting unit 1211 on the substrate 110 falls within the vertical projection range of the third color filter unit on the substrate 110, so as to ensure that the emergent light of each light emitting unit can be emitted through the corresponding filter unit, and ensure that the black matrix 130 does not shield the light emitting units in the thickness direction of the display panel, thereby ensuring a good display effect at a normal viewing angle.
Optionally, the shape of a first vertical projection of the light emitting unit on the substrate 110 is the same as the shape of a second vertical projection of the light filtering unit corresponding to the light emitting unit on the substrate 110;
in any direction, the distance between the corresponding sides of the first vertical projection and the second vertical projection is greater than 0 and less than or equal to 10 μm.
Fig. 7 and 8 exemplarily show that the light emitting units are rectangles, and fig. 7 schematically shows the distance between the light emitting unit and the black matrix on the left side thereof, which is embodied in fig. 8 as the distance between the boundary of the light emitting unit and the left boundary of the green light unit, wherein the distance between the first light emitting unit 1231 and the left boundary of the corresponding filter unit 143 is d3, the distance between the second light emitting unit 1221 and the left boundary of the corresponding filter unit 142 is d2, and the distance between the third light emitting unit 1211 and the left boundary of the corresponding filter unit 141 is d 1.
Specifically, since the filter unit is disposed in the opening 131 of the black matrix 130, a first vertical projection of the light emitting unit on the substrate and a second vertical projection of the filter unit corresponding to the light emitting unit on the substrate have the same shape, that is, the first vertical projection of the light emitting unit on the substrate and the opening 131 of the black matrix 130 have the same shape, and in any direction, a distance between corresponding sides of the first vertical projection and the second vertical projection is greater than 0 and less than or equal to 10 μm, that is, the opening 131 of the black matrix 130 has a certain degree of outward expansion with respect to the light emitting unit, so that light rays blocked by the black matrix 130 at a large viewing angle by subpixels of different colors can be reduced, thereby further facilitating further improvement of color shift; and because the distance between the corresponding sides of the first vertical projection and the second vertical projection is greater than 0 and less than or equal to 10 μm, the luminous brightness of each luminous color sub-pixel can still be ensured to be attenuated along with the increase of the visual angle under the large visual angle, namely, the color cast phenomenon is improved under the requirement of ensuring the attenuation of the brightness of the large visual angle.
Optionally, the distance between the corresponding sides of the first vertical projection and the second vertical projection is 2 μm, so that the opening 131 of the black matrix 130 has a smaller outward expansion size relative to the light emitting unit, and thus on the basis of improving the color cast phenomenon under the requirement of ensuring the brightness attenuation at a large viewing angle, it is ensured that the black matrix 130 can absorb more reflected light of metal in the display panel, and further, a good display effect is ensured.
Optionally, the distance between the corresponding sides of the first vertical projection and the second vertical projection is 5 μm, so that the opening 131 of the black matrix 130 has a moderate outward expansion size relative to the light emitting unit, and light rays of different color sub-pixels blocked by the black matrix 130 at a large viewing angle can be reduced, and further on the basis of improving the color cast phenomenon under the requirement of ensuring the brightness attenuation at the large viewing angle, the black matrix 130 can be ensured to effectively absorb the reflected light rays of metal in the display panel, and further a good display effect is ensured.
Optionally, the distance between the corresponding sides of the first vertical projection and the second vertical projection is 10 μm, which may make the opening 131 of the black matrix 130 have a larger size relative to the external expansion of the light emitting unit, and may further reduce the light rays of the sub-pixels with different colors shielded by the black matrix 130 under a large viewing angle, thereby further improving color shift.
Optionally, the shape of each light emitting unit is the same. Alternatively, the shape of the light emitting unit may refer to a shape of a perpendicular projection of the light emitting unit on the substrate, for example, the shape of the perpendicular projection of the light emitting unit on the substrate may be, but is not limited to, a circle, an equilateral polygon, or a rectangle. The shapes of the light-emitting units are the same, and the size difference of the light-emitting unit of any color and the light-emitting units of other colors in the set direction is smaller than or equal to the set size, so that the proportion of the proportional attenuation of the areas of the sub-pixels of different colors, which are shielded by the black matrix, is more consistent along with the change of the visual angle when a user watches a screen in any direction, and the color cast phenomenon is further improved. Meanwhile, the shapes of the light emitting units are the same, so that when the light emitting units are formed, the shapes of the pixel openings of the pixel limiting layer 140 are the same, and the process is simpler.
On the basis of the above technical solution, optionally, the size difference between the light emitting unit of any color and the light emitting units of other colors in the setting direction is equal to 0.
Specifically, the size difference of the light-emitting unit of any color and the light-emitting units of other colors in the set direction is equal to 0, that is, the shapes and sizes of the light-emitting units of different colors are completely the same, so that the change difference of the area ratios of the light-emitting units of different colors, which are shielded by the black matrix, is almost 0 along with the change of the viewing angle of the screen viewed by a user, and further, the attenuation of the light-emitting brightness of the light-emitting units of different colors along with the change of the viewing angle is completely consistent, and the color cast phenomenon is effectively improved.
It should be noted that the top view of the display panel provided in the above embodiments of the present invention only shows the structure of one pixel, and does not show the overall structure of all pixels, and the present embodiment does not specifically limit the arrangement of the overall pixels in the display panel.
Fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 9, a display device 10 according to an embodiment of the present invention includes the display panel 100 according to any embodiment of the present invention. The display device may be a mobile phone shown in fig. 9, or may be a computer, a television, an intelligent wearable display device, and the like, which is not particularly limited in this embodiment of the present invention; the display panel included in the display device 10 may be rectangular as shown in fig. 9, or may be circular or polygonal, and the present embodiment is not limited in particular.
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 (9)
1. A display panel, comprising:
a substrate;
the sub-pixels with different light-emitting colors are arranged on one side of the substrate, wherein at least one sub-pixel with the light-emitting color comprises two or more light-emitting units with corresponding colors; the sub-pixels of other light-emitting colors comprise at least one light-emitting unit of a corresponding color; the size difference of the light-emitting unit of any color and the light-emitting units of other colors in a set direction is smaller than or equal to the set size, and the set direction is any direction;
the color filter layer is arranged on one side, far away from the substrate, of the sub-pixel and comprises a black matrix, the black matrix comprises an opening, a light filtering unit is arranged in the opening, and the light filtering units and the light emitting units are in one-to-one correspondence in the thickness direction of the display panel;
the display panel at least comprises a first color sub-pixel, a second color sub-pixel and a third color sub-pixel;
at least the first color sub-pixel comprises two or more first color light emitting units; the service life of the first color light-emitting unit is shorter than that of any other color light-emitting unit;
the number of the first color light-emitting units included in the first color sub-pixel is greater than or equal to the number of the other arbitrary color light-emitting units included in the other arbitrary color sub-pixels.
2. The display panel according to claim 1, wherein the set size is 15% of a size of a light-emitting unit having a smallest area among the light-emitting units in the set direction.
3. The display panel according to claim 1, wherein the second color sub-pixel comprises two or more second color light emitting units, the lifetime of the second color light emitting units is longer than that of the first color light emitting units, and the number of the second color light emitting units included in the second color sub-pixel is less than or equal to that of the first color light emitting units included in the first color sub-pixel.
4. The display panel according to claim 3, wherein the third color sub-pixel comprises at least one third color light emitting unit, the lifetime of the third color light emitting unit is longer than that of the second color light emitting unit, and the number of the third color light emitting units included in the third color sub-pixel is less than or equal to that of the second color light emitting units included in the second color sub-pixel.
5. The display panel according to claim 1, wherein the second color sub-pixel comprises a second color light emitting unit, and the third color sub-pixel comprises a third color light emitting unit.
6. The display panel according to claim 1, wherein a first vertical projection of the light emitting unit on the substrate falls within a second vertical projection range of the corresponding filter unit on the substrate.
7. The display panel according to claim 6, wherein a first vertical projection of the light emitting unit on the substrate and a second vertical projection of the filter unit corresponding to the light emitting unit on the substrate have the same shape;
in any direction, the distance between the first vertical projection and the corresponding side of the second vertical projection is greater than 0 and less than or equal to 10 μm.
8. The display panel according to claim 1, wherein the difference in size in the set direction between the light-emitting unit of any color and the light-emitting units of other colors is equal to 0.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
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| US11647658B2 (en) * | 2019-06-28 | 2023-05-09 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Color shift compensation method, display panel and display device |
| CN112713175B (en) * | 2020-12-14 | 2022-11-22 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN112802950A (en) * | 2021-03-30 | 2021-05-14 | 北京芯海视界三维科技有限公司 | Light-emitting module, display screen and display |
| CN113113443B (en) * | 2021-04-19 | 2022-12-16 | 武汉天马微电子有限公司 | Display panel and display device |
| CN113241014B (en) * | 2021-05-21 | 2022-09-20 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113327962B (en) | 2021-05-21 | 2022-08-23 | 武汉华星光电技术有限公司 | OLED display panel and OLED display device |
| CN114038895B (en) * | 2021-06-22 | 2024-04-30 | 昆山国显光电有限公司 | Display panel and display device |
| CN115666185A (en) * | 2022-10-10 | 2023-01-31 | 武汉华星光电半导体显示技术有限公司 | Display panel |
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| US8827488B2 (en) * | 2008-10-01 | 2014-09-09 | Universal Display Corporation | OLED display architecture |
| KR101097343B1 (en) * | 2010-03-09 | 2011-12-23 | 삼성모바일디스플레이주식회사 | Organic light emitting display apparatus |
| US8334545B2 (en) * | 2010-03-24 | 2012-12-18 | Universal Display Corporation | OLED display architecture |
| CN103477713B (en) * | 2011-03-31 | 2016-08-24 | 夏普株式会社 | Substrate for display, organic electroluminescence display device and method of manufacturing same and their manufacture method |
| US20180053811A1 (en) * | 2016-08-22 | 2018-02-22 | Emagin Corporation | Arrangement of color sub-pixels for full color oled and method of manufacturing same |
| JP6500945B2 (en) * | 2017-07-31 | 2019-04-17 | セイコーエプソン株式会社 | Electro-optical device |
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| CN109243365B (en) * | 2018-09-20 | 2021-03-16 | 合肥鑫晟光电科技有限公司 | Display method of display device and display device |
| CN210052744U (en) * | 2019-08-22 | 2020-02-11 | 广东聚华印刷显示技术有限公司 | Pixel arrangement structure, color film structure and display panel |
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