Display panel and display device

Abstract

The invention relates to a display panel and a display device, the display panel comprises an array substrate, a light emitting device layer and a color filter layer, and the array substrate comprises TFT devices arranged in an array; the light-emitting device layer is located above the array substrate and comprises light-emitting pixels arranged in an array mode. The color filter layer is located above the light-emitting device layer and comprises a black matrix and a plurality of first color light resistors located in openings of the black matrix, and the first color light resistors correspond to the light-emitting pixels in position; the color filter layer further comprises a plurality of second color light resistors, and the second color light resistors are arranged on the side, away from the light-emitting device layer, of the black matrix and located between every two adjacent openings in the black matrix. By arranging the second color light resistor, the reflectivity of the ambient light when the display panel is turned off is adjusted, so that the hue of the display panel in the state of turning off the screen is adjusted, and the problem that the hue of the display panel is abnormal in the state of turning off the screen is solved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the promotion of large-size display screens and folding screens, PLP (Pol Less Panel, Chinese abbreviation: removing the polarizer of the display panel) technology is now introduced. PLP technology uses BM (Black Matrix, Chinese abbreviation: black matrix) to block in non-pixel areas to prevent panel light leakage and reduce the light reflectivity of the panel; CF (Color Filter, Chinese abbreviation: color filter) is used in the pixel area, and the R / G / B color resistance of CF corresponds to the light-emitting device in the pixel area respectively; in this way, although the overall thickness of the functional layer can be reduced from 100μm to below 5μm, and the light output rate of the panel can be increased from 42% to 60%; but it will affect the hue of the panel when the screen is off. Summary of the invention

[0003] The embodiments of the present application provide a display panel and a display device, which can adjust the hue of the display panel in the screen-off state, thereby improving the problem of abnormal hue of the display panel in the screen-off state.

[0004] In order to achieve the above object, according to a first aspect of the present application, a display panel is provided, comprising:

[0005] An array substrate, comprising TFT devices arranged in an array;

[0006] a light emitting device layer, located above the array substrate, the light emitting device layer comprising light emitting pixels arranged in an array; and

[0007] A color filter layer, located above the light-emitting device layer, the color filter layer comprising a black matrix and a plurality of first color photoresists located in openings of the black matrix, the first color photoresists corresponding to positions of the light-emitting pixels;

[0008] Wherein, the color filter layer further includes a plurality of second color photoresists, which are arranged on a side of the black matrix away from the light-emitting device layer and between two adjacent openings on the black matrix.

[0009] In one embodiment, the first color photoresist extends toward the periphery of the opening to form an extension portion, and the extension portion is disposed along the circumference of the opening and covers a portion of the black matrix.

[0010] In one embodiment, the second color photoresist and the first color photoresist adjacent thereto are arranged alternately.

[0011] In one embodiment, a plurality of the first color photoresists adjacent to the second color photoresist include a first sub-color resist having the same color as the second color photoresist, and the first sub-color resist partially overlaps with the second color photoresist.

[0012] In one embodiment, the area of ​​the black matrix is ​​set to S1;

[0013] The overlapping area of ​​the first color photoresists and the black matrix is ​​set to S2;

[0014] The overlapping area of ​​the plurality of second color photoresists and the black matrix is ​​set to S3;

[0015] Among them, (S2+S3) / S1 is greater than or equal to 80% and less than or equal to 100%.

[0016] In one embodiment, the plurality of first color resists include a first red resist, a first green resist, and a first blue resist;

[0017] The plurality of second color photoresists include a second red color resist, a second green color resist and a second blue color resist;

[0018] The sum of the orthographic projection areas of the first red color resist on the array substrate and the orthographic projection areas of the second red color resist on the array substrate is S4;

[0019] The sum of the orthographic projection areas of the first green color resist on the array substrate and the orthographic projection areas of the second green color resist on the array substrate is S5;

[0020] The sum of the orthographic projection areas of the first blue color resist on the array substrate and the orthographic projection areas of the second blue color resist on the array substrate is S6;

[0021] Among them, S5 is greater than S6, and S6 is greater than S4.

[0022] In one embodiment, in the thickness direction of the display panel, the thickness of the second color photoresist is less than or equal to the thickness of the first color photoresist located in the opening.

[0023] In one embodiment, the second color photoresist comprises a single-layer color resist pattern, and the color resist pattern has the same color as one of the plurality of first color photoresists adjacent thereto.

[0024] In one embodiment, in the thickness direction of the display panel, the second color light resist includes three layers of color resist patterns stacked together, and the colors of the three layers of the color resist patterns are different.

[0025] According to a second aspect of the present application, a display device is provided, comprising the above-mentioned display panel.

[0026] In the display panel of the embodiment of the present application, a light-emitting device layer is arranged on the array substrate, a color filter layer is arranged on the light-emitting device layer, the color filter layer includes a black matrix, openings are arranged on the black matrix at positions corresponding to the light-emitting pixels of the light-emitting device layer, and a first color photoresist is arranged at the openings; the PLP technology is realized by arranging the black matrix and the first color photoresist; at the same time, a second color photoresist is arranged on the side of the black matrix away from the array substrate, and the second color photoresist is located between two adjacent openings on the black matrix; by arranging the second color photoresist, the coverage area of ​​the color photoresist is increased, so that the reflectivity of the ambient light of the display panel when the screen is off can be adjusted, thereby adjusting the hue of the display panel in the screen-off state, and then improving the problem of abnormal hue of the display panel in the screen-off state.

[0027] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0029] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0030] Figure 1 A schematic diagram of a first color-resistance arrangement of a filter layer of a display panel provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of a second color-resistance arrangement of a filter layer of a display panel provided in an embodiment of the present application;

[0032] Figure 3 A film layer diagram of a display panel provided in an embodiment of the present application;

[0033] Figure 4 A mapping diagram of the color resistance coverage and hue provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0035] The embodiments of the present application provide a display panel 100 and a display device. The following are detailed descriptions of each. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0036] The present application does not limit the specific form of the display device, and the display device may be an OLED display device. The display device provided in the embodiments of the present disclosure may be applied to electronic devices, such as mobile phones, tablet computers, televisions, monitors, laptop computers, digital photo frames, navigators, and vehicle displays, and may also be any product or component with a display function, such as a wearable device, such as a smart watch, a smart bracelet, smart glasses, smart headphones, smart clothing, a head-mounted display, etc.

[0037] In a first aspect, the present application embodiment provides a display panel 100, see Figures 1 to 3 The display panel 100 includes an array substrate 1, a light-emitting device layer 2 and a color filter layer 3; the array substrate 1 includes TFT devices arranged in an array (not shown in the figure); the light-emitting device layer 2 is located above the array substrate 1, and the light-emitting device layer 2 includes light-emitting pixels 21 arranged in an array; the color filter layer 3 includes a black matrix 31 and a plurality of first color photoresists 32 located in openings 33 of the black matrix 31, and the first color photoresists 32 correspond to the positions of the light-emitting pixels 21; wherein the color filter layer 3 also includes a plurality of second color photoresists 34, and the plurality of second color photoresists 34 are arranged on a side of the black matrix 31 away from the light-emitting device layer 2, and are located between two adjacent openings 33 on the black matrix 31.

[0038] Hue is a basic attribute of color, which refers to the basic hue or pure color of the color. It is the main feature to distinguish different colors, such as red, blue, green, etc. On the color wheel, hue can be expressed as an angle. The color wheel is usually a 360° circle, and each color corresponds to an angle. For example: red corresponds to 0° or 360°; yellow corresponds to 60°; blue corresponds to 240°. The hue of the display panel 100 when the screen is off refers to the color or tone of the display panel 100 when the device is turned off or in a dormant state; usually, when the OLED panel is in the screen-off state, since no pixels emit light, the display panel 100 appears completely black in an ideal state.

[0039] It can be known that a packaging layer 4 is usually provided on the array substrate 1, and the color filter layer 3 is provided on the packaging layer 4, so as to form a COE (full name in English: CF on Encapsulation, Chinese abbreviation: color filter on packaging layer) structure to replace the polarizer, which is beneficial to the display panel 100 to reduce power consumption, improve color gamut, reduce thickness, and improve bending performance. However, since the black matrix 31 is used in the color filter layer 3 to prevent light leakage from the display panel 100 and the light reflectivity of the display panel 100, and the first color photoresist 32 is provided corresponding to the luminous pixel 21, in the screen-off state, since the ambient light reflectivity at the positions corresponding to the black matrix 31 and the first color photoresist 32 on the color filter layer 3 is different, it will affect the hue of the display panel 100 in the screen-off state, and the display panel 100 will not appear completely black in the screen-off state.

[0040] In the present application, the second color photoresist 34 is arranged on the side of the black matrix 31 away from the light-emitting device layer 2, and the second color photoresist 34 is located at a position corresponding to the position between two adjacent openings 33, so as to increase the coverage area of ​​the color photoresist. In this way, the reflectivity of the ambient light of the display panel 100 when the screen is off can be adjusted, thereby adjusting the hue of the display panel 100 in the screen-off state, thereby improving the problem of abnormal hue of the display panel 100 in the screen-off state.

[0041] It is understandable that a plurality of the openings 33 are provided on the black matrix 31 at positions corresponding to the light-emitting pixels 21, and the area of ​​the openings 33 is greater than or equal to the area of ​​the light-emitting pixels 21, thereby improving the transmittance of light and further improving the display effect of the display panel 100. In addition, the first color photoresist 32 is provided at the openings 33, and the filtering spectrum of the first color photoresist 32 is consistent with the light-emitting spectrum of the light-emitting pixels 21, thereby ensuring the display effect of the display panel 100.

[0042] The present application does not impose any specific restrictions on the coverage areas of the first color photoresist 32 and the second color photoresist 34. For example, when the hue of the display panel 100 is reddish in the off-screen state, the hue of the display panel 100 in the off-screen state can be corrected by adjusting to reduce the total coverage of the red color resist and increase the total coverage of the blue color resist or the green color resist, thereby improving the problem of abnormal hue of the display panel 100 in the off-screen state.

[0043] In the field of color science and color management, the CIELAB color space is a three-dimensional color model designed to match the perceived differences in color with numerical differences. In the CIELAB color space, the three dimensions refer to: L* represents lightness or brightness, from 0 (completely black) to 100 (completely white); a* represents the chromaticity change from green (negative value) to red (positive value); b* represents the chromaticity change from blue (negative value) to yellow (positive value). Hue is determined by the two parameters a* and b*, because hue is actually the angular position on the color wheel, and a* and b* define the position of a point on this two-dimensional plane.

[0044] In one embodiment of the present application, the plurality of first color resists 32 include a first red color resist 321, a first green color resist 322, and a first blue color resist 323; the plurality of second color resists 34 include a second red color resist 341, a second green color resist 342, and a second blue color resist 343; the following is a hue correction experiment by changing the coverage of the RGB color resists on the BM, and Table 1 shows the coverage change values ​​of the RGB color resists on the BM.

[0045]

[0046] In the initial state, the coverage of the red color resist on the black matrix 31 is 9.24%, the a* value is 0.48, and the b* value is -3.46; the coverage of the green color resist on the black matrix 31 is 13.7%, the a* value is 0.48, and the b* value is -3.46; the coverage of the blue color resist on the black matrix 31 is 10.06%, the a* value is 0.48, and the b* value is -3.46.

[0047] After the plurality of first color photoresists 32 and the plurality of second color photoresists 34 are adjusted, see Figure 4 When the total coverage of the first red color resist 321 and the second red color resist 341 on the black matrix 31 increases to 25.19%, the a* value is adjusted to 0.70, and the b* value is adjusted to -3.04; when the total coverage of the first green color resist 322 and the second green color resist 342 on the black matrix 31 increases to 29.91%, the a* value is adjusted to 0.23, and the b* value is adjusted to -3.15; when the total coverage of the first blue color resist 323 and the second blue color resist 343 on the black matrix 31 increases to 26%, the a* value is adjusted to 0.85, and the b* value is adjusted to -3.52.

[0048] Combination Figure 4From the mapping relationship diagram between the color resist coverage and the hue, it can be seen that, assuming that the area of ​​the black matrix 31 is set to S1; the overlapping area of ​​the multiple first color photoresists 32 and the black matrix 31 is set to S2; the overlapping area of ​​the multiple second color photoresists 34 and the black matrix 31 is set to S3; (S2+S3) / S1 is greater than or equal to 80% and less than or equal to 100%; that is, when the total coverage of the multiple first color photoresists 32 and the multiple second color photoresists 34 on the black matrix 31 is above 80%, the hue of the display panel 100 in the screen-off state can be adjusted by 1°~2°.

[0049] In addition, the sum of the orthographic projection areas of the first red color resist 321 on the array substrate 1 and the orthographic projection areas of the second red color resist 341 on the array substrate 1 is S4; the sum of the orthographic projection areas of the first green color resist 322 on the array substrate 1 and the second green color resist 342 on the array substrate 1 is S5; the sum of the orthographic projection areas of the first blue color resist 323 on the array substrate 1 and the second blue color resist 343 on the array substrate 1 is S6; wherein, S5 is greater than S6, and S6 is greater than S4; that is, setting the overlapping area of ​​the G color resist with the black matrix 31 to the maximum, the overlapping area of ​​the B color resist with the black matrix 31 to the maximum, and the overlapping area of ​​the R color resist with the black matrix 31 to the minimum can better correct the hue of the display panel 100 in the screen-off state.

[0050] The present application does not specifically limit the manner of increasing the coverage of the first color photoresist 32 and the second color photoresist 34 on the black matrix 31 .

[0051] See also Figure 1 In the first embodiment of the present application, the first color photoresist 32 extends toward the periphery of the opening 33 and forms an extension portion 25 . The extension portion 25 is arranged along the circumference of the opening 33 and covers a portion of the black matrix 31 .

[0052] In the first embodiment, the overlapping area between the first color photoresist 32 and the black matrix 31 is increased to increase the coverage of the RGB color resist on the black matrix 31, thereby adjusting the reflectivity of the ambient light of the display panel 100 when the screen is off, thereby adjusting the hue of the display panel 100 in the screen-off state, and further improving the problem of abnormal hue of the display panel 100 in the screen-off state.

[0053] Further reading Figure 1, the second color photoresist 34 and the first color photoresist 32 adjacent thereto are arranged at intervals; when the screen is in the off state, when the hue correction range of the display panel 100 is small, the coverage of the second color photoresist 34 on the black matrix 31 can be reduced by reducing the area of ​​the second color photoresist 34, thereby reducing the hue correction range.

[0054] See also Figure 2 In the second embodiment of the present application, among the plurality of first color photoresists 32 adjacent to the second color photoresist 34 , a first sub-color resist 32 a having the same color as the second color photoresist 34 is included, and the first sub-color resist 32 a partially overlaps with the second color photoresist 34 .

[0055] The same as the first embodiment is that, in the second embodiment, the coverage of the RGB color resist on the black matrix 31 is increased by increasing the overlapping area between the first color photoresist 32 and the black matrix 31; however, the difference from the first embodiment is that the coverage of the RGB color resist on the black matrix 31 is increased by setting the first sub-color resist 32a and the second color photoresist 34 to partially overlap, thereby increasing the hue correction amplitude.

[0056] Furthermore, when the first sub-color resist 32 a and the second color resist 34 are partially overlapped, the first sub-color resist 32 a and the second color resist 34 of the same color can be etched through one mask, thereby simplifying the process.

[0057] In one embodiment of the present application, please refer to Figure 3 In the thickness direction of the display panel 100, the thickness of the second color photoresist 34 is less than or equal to the thickness of the first color photoresist 32 located in the opening 33; thus, the color resists of the same color in the first color photoresist 32 and the second color photoresist 34 can be manufactured by the same process, thereby simplifying the process of color resist.

[0058] The present application does not impose any specific restrictions on the thickness of the first color photoresist 32. In one embodiment, the thickness of the first color photoresist 32 is set to be 1 um to 7 um, which can be designed according to the actual product.

[0059] The present application does not impose any specific limitation on the structure of the second color photoresist 34 .

[0060] In one embodiment, the second color photoresist 34 includes a single-layer color resist pattern, and the color resist pattern is the same color as one of the plurality of first color photoresists 32 adjacent thereto; that is, the second color photoresist 34 can be set to one of a red color resist pattern, a green color resist pattern or a blue color resist pattern.

[0061] In one embodiment, in the thickness direction of the display panel 100, the second color photoresist 34 includes three layers of color resist patterns stacked together, and the colors of the three layers of the color resist patterns are different; that is, the second color photoresist 34 includes a red color resist pattern, a green color resist pattern and a blue color resist pattern stacked together; by setting the three layers of the color resist patterns stacked together, on the one hand, the hue of the display panel 100 in the screen-off state can be adjusted; on the other hand, the light reflectivity can be reduced, the light reflectivity of various parts of the display panel 100 in the screen-off state can be balanced, and the problem of local visual differences in the display panel 100 in the screen-off state can be improved.

[0062] In one embodiment, a planar layer 5 is disposed on a side of the color filter layer 3 away from the array substrate 1 , and an optical adhesive layer 6 is disposed on a side of the planar layer 5 away from the color filter layer 3 .

[0063] In a second aspect, an embodiment of the present application provides a display device. The display device includes a display panel 100. It should be noted that the display panel 100 is set as the above-mentioned display panel 100, that is, the display panel 100 includes all the technical features of the above-mentioned display panel 100, and the display device includes all the embodiments of the above-mentioned display panel 100, and also has all the technical effects of the above-mentioned embodiments, which will not be described one by one here.

[0064] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0065] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0066] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0067] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display panel, characterized in that: include: An array substrate, comprising TFT devices arranged in an array; A light emitting device layer, located above the array substrate, the light emitting device layer comprising light emitting pixels arranged in an array; as well as, A color filter layer, located above the light-emitting device layer, the color filter layer comprising a black matrix and a plurality of first color photoresists located in openings of the black matrix, the first color photoresists corresponding to positions of the light-emitting pixels; Wherein, the color filter layer further includes a plurality of second color photoresists, which are arranged on a side of the black matrix away from the light-emitting device layer and between two adjacent openings on the black matrix.

2. The display panel according to claim 1, wherein: The first color photoresist extends toward the periphery of the opening to form an extension portion, and the extension portion is arranged along the periphery of the opening and covers a portion of the black matrix.

3. The display panel according to claim 1, wherein: The second color photoresist and the first color photoresist adjacent thereto are arranged at intervals.

4. The display panel according to claim 1, wherein: A plurality of the first color photoresists adjacent to the second color photoresist include a first sub-color resist having the same color as the second color photoresist, and the first sub-color resist partially overlaps with the second color photoresist.

5. The display panel according to any one of claims 2 to 4, characterized in that: The area of ​​the black matrix is ​​set to S1; The overlapping area of ​​the first color photoresists and the black matrix is ​​set to S2; The overlapping area of ​​the plurality of second color photoresists and the black matrix is ​​set to S3; Among them, (S2+S3) / S1 is greater than or equal to 80% and less than or equal to 100%.

6. The display panel according to claim 5, wherein: The first color photoresists include a first red color resist, a first green color resist and a first blue color resist; The plurality of second color photoresists include a second red color resist, a second green color resist and a second blue color resist; The sum of the orthographic projection areas of the first red color resist on the array substrate and the orthographic projection areas of the second red color resist on the array substrate is S4; The sum of the orthographic projection areas of the first green color resist on the array substrate and the orthographic projection areas of the second green color resist on the array substrate is S5; The sum of the orthographic projection areas of the first blue color resist on the array substrate and the orthographic projection areas of the second blue color resist on the array substrate is S6; Among them, S5 is greater than S6, and S6 is greater than S4.

7. The display panel according to claim 1, wherein: In the thickness direction of the display panel, the thickness of the second color photoresist is less than or equal to the thickness of the first color photoresist located in the opening.

8. The display panel according to claim 1, wherein: The second color photoresist includes a single-layer color resist pattern, and the color resist pattern has the same color as one of the plurality of first color photoresists adjacent thereto.

9. The display panel according to claim 1, wherein: In the thickness direction of the display panel, the second color light resist includes three layers of color resist patterns stacked together, and the colors of the three layers of color resist patterns are different.

10. A display device, characterized in that: The invention comprises a display panel as claimed in any one of claims 1 to 9.

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