CN110828526A - Display panel and display device - Google Patents
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- CN110828526A CN110828526A CN201911143289.1A CN201911143289A CN110828526A CN 110828526 A CN110828526 A CN 110828526A CN 201911143289 A CN201911143289 A CN 201911143289A CN 110828526 A CN110828526 A CN 110828526A
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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
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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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
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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
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
Abstract
The application provides a display panel and a display device, which can effectively reduce color cast and/or reflectivity. The display panel comprises a light-emitting layer and a color filter layer. The light emitting layer is provided with a plurality of pixel units, each pixel unit includes a plurality of sub-pixel units, and each sub-pixel unit is provided with an organic light emitting material. The color filter layer is provided with a plurality of filter units, the filter units correspond to the sub-pixel units one to one and are used for filtering light rays emitted by the corresponding sub-pixel units, and the adjacent positions of the adjacent filter units are provided with black matrix units. The projections of the black matrix units on the light emitting layer are positioned between the sub-pixel units, and a space is reserved between each sub-pixel unit and the projection of the black matrix unit adjacent to the sub-pixel unit. In the same pixel unit, the areas of the light emergent surfaces of different sub-pixel units are not all equal, and the distances between the projections of different sub-pixel units and the adjacent black matrix units are not all equal.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel and a display device.
Background
In the prior art, there is a method of disposing a color filter unit above the sub-pixel unit, and using the color filter unit to filter the light of other colors emitted by the sub-pixel unit. To prevent light mixing, a black matrix is disposed between the color filter units.
However, when the display panel to which the above-described technology is applied displays an image, color shift may occur in some cases.
Disclosure of Invention
The invention provides a display panel which can reduce color cast and/or effectively control reflectivity. The display panel includes:
a light emitting layer provided with a plurality of pixel units, each pixel unit including a plurality of sub-pixel units, each sub-pixel unit being provided with an organic light emitting material;
the color filter layer is provided with a plurality of filter units, the filter units correspond to the sub-pixel units one by one and are used for filtering light rays emitted by the corresponding sub-pixel units, and the adjacent positions of the adjacent filter units are provided with black matrix units;
projections of the black matrix units on the light emitting layer are positioned between the sub-pixel units, and a space is reserved between each sub-pixel unit and the projection of the adjacent black matrix unit;
in the same pixel unit, the areas of the light emergent surfaces of different sub-pixel units are not all equal, and the distances between the projections of different sub-pixel units and the adjacent black matrix units are not all equal.
Furthermore, in the same pixel unit, the ratio of the light emitting area of each sub-pixel unit, which is shielded by the black matrix unit, to the total area of the light emitting area is equal.
Further, each pixel unit comprises a first sub-pixel unit for emitting red light, a second sub-pixel unit for emitting green light and a third sub-pixel unit for emitting blue light.
Furthermore, the light-emitting surface of each sub-pixel unit is rectangular.
Further, the length L of the long side of the light-emitting surface of the first sub-pixel unitRThe length L of the long edge of the light-emitting surface of the second sub-pixel unitGAnd the length L of the long edge of the light-emitting surface of the third sub-pixel unitBThe relationship between them is: l isR≤LG≤LB。
Further, the length W of the short side of the light-emitting surface of the first sub-pixel unitRThe second sub-imageShort side length W of plain unit light-emitting surfaceGAnd the length W of the short side of the light-emitting surface of the third sub-pixel unitBThe relationship between them is: wR≤WG≤WB。
Furthermore, the distance from the center point of each edge boundary of the light-emitting surface of each sub-pixel unit to the projection of the black matrix unit is the farthest, and the distance from the end point of each edge boundary to the projection of the black matrix unit is the closest.
Further, the distance C from the center point of the short side of the light-emitting surface of the first sub-pixel unit to the projection of the black matrix unitR1And the distance C from the center point of the short edge of the light-emitting surface of the second sub-pixel unit to the projection of the black matrix unitG1And the distance C from the center point of the short edge of the light-emitting surface of the third sub-pixel unit to the projection of the black matrix unitB1The relationship between them is: cR1≥CG1≥CB1。
Further, the distance C from the center point of the long edge of the light-emitting surface of the first sub-pixel unit to the projection of the black matrixR2And the distance C from the long edge central point of the light-emitting surface of the second sub-pixel unit to the projection of the black matrixG2And the distance C from the long edge central point of the light-emitting surface of the third sub-pixel unit to the projection of the black matrixB2The relationship between them is: cR2≥CG2≥CB2。
The present invention also provides a display device that can reduce color shift and/or effectively control reflectance. The display device comprises the display panel as described above.
Drawings
FIG. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the invention;
FIG. 2 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a sub-pixel unit and its corresponding black matrix unit according to an embodiment of the present invention;
FIG. 4 is a schematic top view of a sub-pixel unit and a corresponding black matrix unit structure according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a light exit of a display panel according to an embodiment of the invention;
FIG. 6 is a schematic top view of a display panel according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" includes two, and is equivalent to at least two. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
Fig. 1 is a cross-sectional view of a display panel according to an embodiment of the present invention. FIG. 2 is a top view of a display panel according to an embodiment of the invention.
Referring to fig. 1 and 2, the display panel according to the embodiment of the invention is an OLED (Organic Light-emitting diode) display panel, which includes a substrate 10, a Light-emitting layer 20, an encapsulation layer 30, a black matrix layer 40, and a color filter layer 50.
The substrate 10 may be a glass plate or a flexible substrate. A driving circuit layer in which a plurality of thin film transistors are formed may be disposed between the substrate 10 and the light emitting layer 20.
The light emitting layer 20 may include a plurality of pixel electrodes disposed at the same layer and a pixel defining layer disposed over the pixel electrodes. Corresponding to the pixel electrodes, a plurality of openings are formed in the pixel defining layer to expose each pixel electrode. The organic light-emitting material is filled in the opening and is positioned above the pixel electrode. The organic light emitting material includes various kinds such as a red light emitting material for emitting red light, a green light emitting material for emitting green light, and a blue light emitting material for emitting blue light. Each opening is filled with only one organic light emitting material. A common electrode is disposed over the organic light emitting material and the pixel defining layer.
The organic light emitting material in the opening and the pixel electrode and the common electrode on the upper and lower sides of the opening form a sub-pixel unit 2011 corresponding to each opening in the pixel definition layer. The adjacent sub-pixel units 2011 with different emission colors can constitute one pixel unit 201. For example, a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit are adjacent to each other to form a pixel unit. In the same pixel unit 201, the color light emitted by each sub-pixel unit 2011 can be mixed to allocate the color that the pixel unit 201 should display.
The light generated by each sub-pixel 2011 is emitted outward and enters the user's field of view. In fig. 1, the sub-pixel unit 2011 emits light from the upper surface, so the upper surface of the sub-pixel unit 2011 or the upper surface of the organic light emitting material can be regarded as the light emitting surface 20111.
The encapsulation layer 30 may be a stacked structure of an inorganic material layer and an organic material layer. For example, the encapsulation layer 30 may include a first inorganic material layer deposited over the light emitting layer 20, an organic material layer formed over the first inorganic material layer, and a second inorganic material layer deposited over the organic material layer.
The color filter layer 50 includes a plurality of filter units 501 and a protective layer disposed over the plurality of filter units 501 and the black matrix layer 40. Similar to the sub-pixel unit 2011, the filter unit 501 is also classified into various types, such as a red filter unit, a green filter unit, and a blue filter unit. In terms of position setting, the filtering units 501 and the sub-pixel units 2011 are in one-to-one correspondence, and are configured to filter light emitted by the corresponding sub-pixel units 2011. For example, the red filter unit is disposed above the red sub-pixel unit, the green filter unit is disposed above the green sub-pixel unit, and the blue filter unit is disposed above the blue sub-pixel unit. A space may be provided between adjacent filter units 501, as shown in fig. 1; in other embodiments, adjacent filter units 501 may be directly connected to each other.
The black matrix layer 40 includes a plurality of black matrix units 401. The black matrix unit 401 is disposed between adjacent sub-pixel units 2011, that is, disposed at a spacing region or a connection between adjacent filter units 501, and is configured to absorb light emitted from the sub-pixel units 2011 and exceeding the range of the corresponding filter unit 501. In the manufacturing process, the black matrix layer 40 may be formed first, and then the color filter layer 50 may be formed on the black matrix layer 40.
Projections of the black matrix unit 401 in the vertical direction are located between the sub-pixel units 2011, and a space is provided between each sub-pixel unit 2011 and the projection of the adjacent black matrix unit 401.
The light emitted from each sub-pixel unit 2011 is divided into two parts, and one part forms light of a specific color after passing through the corresponding filtering unit 501; in order to avoid light mixing between different sub-pixel units 2011, another part of light emitted at a large viewing angle exceeds the range of the corresponding filter unit 501, and the part of light exceeding the range of the corresponding filter unit 501 is absorbed by the black matrix unit 401 at the interval area or the connection of the corresponding filter unit 501.
In the same pixel unit 201, the light beams emitted from all the sub-pixel units 2011 are mixed into the light beam emitted from the pixel unit 201 after passing through the filtering unit 501.
The pixel units 201 are arranged in an array in the light emitting layer 20. The light emitted by each pixel unit 201 forms a pixel in the display image, and the color of the light is the same as the color of the image at the position of the pixel unit 201.
In the prior art, there is a problem that the color of the light finally emitted from the pixel unit 201 is color-shifted from the color of the original image (image to be displayed) at some time and place. It is found through analysis that, in the same pixel unit 201, the lengths L of the light emitting surfaces 20111 of each sub-pixel unit are not all equal, and when the sub-pixel units 2011 emit light rays with the same large viewing angle, the light quantity attenuation degrees are different, so that in the light rays formed by mixing the light rays emitted by the sub-pixel units 2011 after passing through the filter layer 50, the proportion of the light quantity occupied by each sub-pixel unit 2011 in the pixel unit 201 is changed compared with the original light rays, thereby causing color cast. The light quantity attenuation degree refers to a ratio of the quantity of light absorbed by the black matrix unit 401 in each sub-pixel unit 2011 during passing through the filter unit to the total quantity of light emitted by the sub-pixel unit 2011.
In order to solve the problem, the present invention provides a solution, that is, in the same pixel unit 201, when the side lengths L of the light emitting surfaces of different sub-pixel units 2011 are not all equal, the distances C between the projections of different sub-pixel units 2011 and the adjacent black matrix units 401 are not all equal, and the design of the distance C satisfies: in the same sub-pixel unit 201, when each sub-pixel unit 2011 emits light rays with the same large viewing angle, the ratio of the area of the sub-pixel unit light-emitting surface 20111 shielded by the black matrix unit 401 to the total area of the sub-pixel unit light-emitting surface 20111 is equal, so that the light quantity attenuation degree of each sub-pixel unit 2011 is equal.
The design concept of the pitch C will be described by taking the light emitting surface 20111 of the sub-pixel unit as a rectangle.
Fig. 3 is a schematic cross-sectional view of a sub-pixel unit and a corresponding black matrix unit according to an embodiment of the present invention, and fig. 4 is a schematic top view of a sub-pixel unit and a corresponding black matrix unit according to an embodiment of the present invention. The design of the distance C between the projection of each sub-pixel unit 2011 and the adjacent black matrix unit 401 in the embodiment of the present invention is described below with reference to fig. 3 and 4.
Two opposite boundaries of the light exit surface 20111 of the sub-pixel unit 2011 have A, B points, respectively, and a connecting line between the point a and the point B is parallel to the other two boundaries of the light exit surface 20111 of the sub-pixel unit. Fig. 3 is a view obtained by cross-sectioning the sub-pixel unit 2011 and the black matrix unit 401 along a line between the a point and the B point in a direction perpendicular to the light-emitting layer 20 and the black matrix layer 40.
Referring to fig. 3 and 4, when the light emitting surface 20111 of the sub-pixel unit is square, the total area S (total) of the light emitting surface 20111 and the light emitting area S (total) blocked by the black matrix unit 401 are:
s (n) ═ M ═ L ((a + b) tan θ -C) × L;
s (total) ═ L
(S (C)/S (total) ((a + b) tan θ -C)/L
Wherein the content of the first and second substances,
θ is the light exit viewing angle of the sub-pixel unit 2011;
m is the length of the black matrix unit 401 when the sub-pixel unit 2011 emits light at an angle θ on the line connecting the point a and the point B;
l is the side length of the light emitting surface 20111 of the sub-pixel unit;
c is the distance between the projection of the sub-pixel unit 2011 and the adjacent black matrix unit 401;
a is the height of the black matrix;
b is a distance from the light emitting surface 20111 of the sub-pixel unit to a surface of the black matrix unit 401 away from the sub-pixel unit 2011 (i.e., a lower surface of the black matrix unit 401).
As can be seen from the above formula, when the light emitting surface 20111 of the sub-pixel unit is square, in the same pixel unit 201, in order to ensure that the ratio of the light emitting area S (shielded) of each sub-pixel unit 2011 shielded by the black matrix unit 401 to the total area S (total) of the light emitting surface 20111 is equal, if the side length L of the sub-pixel unit 2011 is longer, the distance C between the sub-pixel unit 2011 and the projection of the adjacent black matrix unit 401 needs to be smaller at the same incident light viewing angle.
In the same pixel unit 201, the purpose that the longer the side length L of the sub-pixel unit 2011 is, the smaller the distance C between the projection of each sub-pixel unit 2011 and the adjacent black matrix unit 401 needs to be is achieved, which can be achieved by the following two ways:
1. under the condition that the side length of the black matrix unit 401 and the side length of the light emitting surface 20111 of the sub-pixel unit are fixed, the distance C between the projection of the sub-pixel unit 2011 and the adjacent black matrix unit 401 can be designed to be the width meeting the requirement according to the side length L of the light emitting surface 20111 of the sub-pixel unit;
2. if the pitches between the sub-pixel units 2011 are equal, the side lengths of the black matrix units 401 corresponding to the pitches between the sub-pixel units 2011 can be designed to be different, so as to achieve the purpose of different pitches C between the projections of different sub-pixel units 2011 and the adjacent black matrix units 401.
It should be noted that, if the light emitting surface 20111 of the sub-pixel unit in the same pixel unit 201 has a shape other than the square illustrated above, the design of the distance C between the projection of each sub-pixel unit 201 and the adjacent black matrix unit 401 also satisfies the following requirements: at the same incident light viewing angle, the ratio of the light emitting area S (covered) of each sub-pixel unit 201 covered by the black matrix unit 40 to the total area S (total) of the light emitting surface 20111 is equal.
The design and implementation of the spacing C between the projection of the sub-pixel unit 2011 and its adjacent black matrix unit 401 is done by way of example above. The shape design of the black matrix unit 401 is explained below by some other embodiments.
FIG. 5 is a schematic diagram of light exiting from a display panel according to an embodiment of the invention.
Referring to fig. 5, the structure of the OLED display panel according to an embodiment of the present invention is well known to those skilled in the art and will not be described in detail herein. The light emitting surface 20111 on the side of the OLED display panel emitting light is a transparent film structure, and the external light 90 irradiates the metal layer and the routing wire inside the display panel through the filtering unit 501, so as to generate reflected light 91 to be emitted from the light emitting surface 20111 of the display panel. For the OLED display panel, the light emitted from the light emitting surface 20111 is composed of two parts, one part is the light 92 emitted from the sub-pixel unit 2011 itself, and the other part is the light 91 emitted from the light emitting surface 20111, which is emitted into the sub-pixel unit 2011 through the filter unit 501 and reflected by the outside. During image display, the light ray 92 emitted from each sub-pixel unit 2011 is an accurate light ray (i.e., a required light ray) for forming an image, and enters the sub-pixel unit 2011 from the outside through the filter unit 501 and is reflected, and the light ray 91 emitted from the light emitting surface 20111 is an interference light ray for forming an image.
For a certain image to be displayed, the amount of light rays 92 generated by each sub-pixel unit 2011 itself is determined, as long as the design of the distance C between the projection of the sub-pixel unit 201 and the adjacent black matrix unit 401 satisfies the following requirements, as described in the previous embodiment: when the light passes through the filter unit 502, the light quantity attenuation degree of the light 92 emitted by each sub-pixel unit 2011 is the same in the same pixel unit 201, and it is further ensured that the ratio of the total light of the pixel unit 201 to the total light of each sub-pixel unit 2011 is constant before and after passing through the filter unit 501.
However, for the light 91 that enters the sub-pixel unit 2011 from the outside through the filter unit 501 and is reflected, and exits from the light exit surface 20111, the amount of the light 91 is affected by the area of the filter unit 501, and the larger the area of the filter unit 501 is, the larger the amount of the light 91 is, and the larger the interference to the image is. As can be seen from the foregoing analysis of the embodiment, in order to ensure that the ratio of the light emitting area S (covered) of each sub-pixel unit 201 covered by the black matrix unit 40 to the total area S (total) of the light emitting surface 20111 is equal, if the side length L of the light emitting surface 20111 of the sub-pixel is smaller, the distance C between the sub-pixel unit 201 and the projection of the adjacent black matrix unit 401 is larger, and the increase of the distance C increases the area of the filter unit 501 corresponding to the sub-pixel unit 201, so that the light amount of the light 91 is increased, and the interference to the displayed image is generated.
Furthermore, because the current requirements for color cast are based on the directions of the parallel display and the vertical display, namely the direction of the parallel display and the vertical display, the color cast rate needs to be the lowest, and other directions do not need to be required, the invention provides a solution for solving the color cast and reducing the reflectivity.
FIG. 6 is a schematic top view of a display panel according to an embodiment of the invention.
Referring to fig. 6, for clarity, it is assumed that the light emitting surface 20111 of the OLED display panel is square, and X and Y are lines passing through two opposite boundary center points. In order to ensure that the color shift in the directions parallel to the display and perpendicular to the display is the lowest, the color shift rate of the light emitted from the X and Y lines of each sub-pixel unit 2011 is required to be the lowest, so the present invention provides the following shape optimization scheme for the black matrix unit 401:
the projection distance from the black matrix unit 401 to the light emitting layer 20 at the boundary center point of the sub-pixel unit light emitting surface 20111 is the maximum, and the distance is C, and C needs to satisfy the design rule described above. The projection pitch from the black matrix unit 401 to the light emitting layer 20 is the smallest at the boundary end of the sub-pixel unit light exit surface 20111.
The endpoints a and B of the projection of the black matrix unit 401 on the light emitting layer 20 are determined according to the central point and the endpoint of the boundary of the light emitting surface 20111 of the sub-pixel unit, and then the endpoints a and B are connected to obtain the shape of the boundary of the black matrix unit 401 near the side of the sub-pixel unit 2011.
It should be noted that the above optimized design of the shape of the black matrix unit 401 is only for the display panel in which the external light enters the sub-pixel unit 2011 through the filter unit 501 and is reflected, and exits from the light exit surface 20111. If the emergent ray of the display panel does not have such a scene, the distance C between the projection of the black matrix unit 401 and the adjacent sub-pixel unit 2011 only needs to be within the same pixel unit 201: at the same incident light viewing angle, the ratio of the light emitting area S (covered) of each sub-pixel unit 201 covered by the black matrix unit 40 to the total area S (total) of the light emitting surface 20111 is equal.
For convenience of illustration, the above embodiments or examples have been described by selecting the shape of the light emitting surface 20111 of the sub-pixel unit as a standard symmetric shape, and it is obvious that if the shape of the light emitting surface 20111 of the sub-pixel unit is not a standard symmetric shape, the projection distance C between the light emitting surface 20 of the sub-pixel unit 2011 and the black matrix unit 201 is as follows: in the same incident light viewing angle, the light emitting area S (covered) of each sub-pixel unit 201 covered by the black matrix unit 40 is designed according to the idea that the ratio of the total area S (total) of the light emitting surface 20111 is equal, which is the protection scope of the present invention.
Fig. 7 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention.
The display panel in this embodiment is an OLED display panel, and as shown in fig. 7, includes a substrate 10, a light emitting layer 20, an encapsulation layer 30, a black matrix layer 40, and a color filter layer 50.
The light-emitting layer 20 includes pixel units 201 arranged in a matrix, and each pixel unit 201 includes three sub-pixel units 2011, namely a first sub-pixel unit 2011 (the left sub-pixel unit in fig. 7), a second sub-pixel unit 2011 (the middle sub-pixel unit in fig. 7), and a third sub-pixel unit 2011 (the right sub-pixel unit in fig. 7). Each sub-pixel unit 2011 includes a pixel opening 20113 disposed in the light-emitting layer 20 and a light-emitting unit 20112 disposed in the pixel opening 20113, and a light-emitting surface 20111 is disposed on a side of each sub-pixel unit 2011 emitting light, where the light-emitting surface 20111 is rectangular. Each sub-pixel unit 2011 emits red, green, and blue light, respectively.
The relationship among the long edge length LR of the light-emitting surface of the first sub-pixel unit, the long edge length LG of the light-emitting surface of the second sub-pixel unit and the long edge length LB of the light-emitting surface of the third sub-pixel unit is as follows: LR is less than or equal to LG and less than or equal to LB.
The relationship among the short side length WR of the light-emitting surface of the first sub-pixel unit, the short side length WG of the light-emitting surface of the second sub-pixel unit and the short side length WB of the light-emitting surface of the third sub-pixel unit is as follows: WR is less than or equal to WG and less than or equal to WB.
The filter unit 501 includes a first filter unit 501 (filter unit on the left side in fig. 7), a second filter unit 501 (filter unit in the middle in fig. 7), and a third filter unit 501 (filter unit on the right side in fig. 7).
The first light filtering unit is used for filtering light emitted by the first sub-pixel unit, and the color of the light is red after the light of the first sub-pixel unit passes through the first light filtering unit;
the second light filtering unit is used for filtering light emitted by the second sub-pixel unit, and the color of the light is green after the light of the second sub-pixel unit passes through the second light filtering unit;
and the third light filtering unit is used for filtering light emitted by the third sub-pixel unit, and the color of the light is blue after the light of the third sub-pixel unit passes through the third light filtering unit.
According to the foregoing rule, in this embodiment, in the same pixel unit 201, the distance from the central point of each boundary of each light emitting surface of each sub-pixel unit to the projection of the black matrix unit is farthest, the distance from the end point of each boundary to the projection of the black matrix unit is closest, and the distance satisfies:
the relationship among the distance CR1 from the center point of the short side of the luminous surface of the first sub-pixel unit to the projection of the black matrix unit, the distance CG1 from the center point of the short side of the luminous surface of the second sub-pixel unit to the projection of the black matrix unit and the distance CB1 from the center point of the short side of the luminous surface of the third sub-pixel unit to the projection of the black matrix unit is as follows: CR1 is more than or equal to CG1 is more than or equal to CB 1.
The relationship among the distance CR2 from the center point of the long side of the light emitting surface of the first sub-pixel unit to the projection of the black matrix, the distance CG2 from the center point of the long side of the light emitting surface of the second sub-pixel unit to the projection of the black matrix, and the distance CB2 from the center point of the long side of the light emitting surface of the third sub-pixel unit to the projection of the black matrix is as follows: CR2 is more than or equal to CG2 is more than or equal to CB 2.
As can be seen from the above description, the present invention has good effects in both resolving color shift and reducing reflectance.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (10)
1. A display panel, comprising:
a light emitting layer provided with a plurality of pixel units, each pixel unit including a plurality of sub-pixel units, each sub-pixel unit being provided with an organic light emitting material;
the color filter layer is provided with a plurality of filter units, the filter units correspond to the sub-pixel units one by one and are used for filtering light rays emitted by the corresponding sub-pixel units, and the adjacent positions of the adjacent filter units are provided with black matrix units;
projections of the black matrix units on the light emitting layer are positioned between the sub-pixel units, and a space is reserved between each sub-pixel unit and the projection of the adjacent black matrix unit;
in the same pixel unit, the areas of the light emergent surfaces of different sub-pixel units are not all equal, and the distances between the projections of different sub-pixel units and the adjacent black matrix units are not all equal.
2. The display panel of claim 1, wherein in the same pixel unit, the ratio of the light emitting area of each sub-pixel unit blocked by the black matrix unit to the total area of the light emitting area is equal.
3. The display panel of claim 1, wherein each pixel cell includes a first sub-pixel cell for emitting red light, a second sub-pixel cell for emitting green light, and a third sub-pixel cell for emitting blue light.
4. The display panel of claim 3, wherein the light-emitting surface of each sub-pixel unit is rectangular.
5. The display panel as claimed in claim 4, wherein the length L of the long side of the light-emitting surface of the first sub-pixel unitRThe relationship between the length LG of the long edge of the light-emitting surface of the second sub-pixel unit and the length LB of the long edge of the light-emitting surface of the third sub-pixel unit is as follows: l isR≤LG≤LB。
6. The display panel of claim 4, wherein the length W of the short side of the light-emitting surface of the first sub-pixel unitRThe relationship between the short side length WG of the light-emitting surface of the second sub-pixel unit and the short side length WB of the light-emitting surface of the third sub-pixel unit is as follows: wR≤WG≤WB。
7. The display panel of claim 3 or 4, wherein the distance from the center point of each edge boundary of the light-emitting surface of each sub-pixel unit to the projection of the black matrix unit is farthest, and the distance from the end point of each edge boundary to the projection of the black matrix unit is closest.
8. The display panel of claim 7, wherein the distance CR1 from the center point of the short side of the light exit surface of the first sub-pixel unit to the projection of the black matrix unit, the distance CG1 from the center point of the short side of the light exit surface of the second sub-pixel unit to the projection of the black matrix unit, and the distance CB1 from the center point of the short side of the light exit surface of the third sub-pixel unit to the projection of the black matrix unit are in a relationship: CR1 is more than or equal to CG1 is more than or equal to CB 1.
9. The display panel of claim 7, wherein the distance CR2 from the center point of the long side of the light exit surface of the first sub-pixel unit to the black matrix projection, the distance CG2 from the center point of the long side of the light exit surface of the second sub-pixel unit to the black matrix projection, and the distance CB2 from the center point of the long side of the light exit surface of the third sub-pixel unit to the black matrix projection are in a relationship: CR2 is more than or equal to CG2 is more than or equal to CB 2.
10. A display device characterized in that the display device comprises the display panel according to any one of claims 1 to 9.
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