Display panel and display device

Abstract

The application relates to a display panel and a display device, the display panel comprising an array substrate, a light-emitting device layer and a color filter layer, the array substrate comprising arrayed TFT devices; the light-emitting device layer is located above the array substrate and comprises arrayed light-emitting pixels; the color filter layer is located above the light-emitting device layer and comprises a black matrix and a plurality of first color resists located in openings of the black matrix, the first color resists corresponding to positions of the light-emitting pixels; wherein the color filter layer further comprises a plurality of second color resists, the plurality of second color resists being arranged on a side of the black matrix away from the light-emitting device layer and located between adjacent two openings of the black matrix; by arranging the second color resists, the reflectivity of ambient light when the display panel is in a screen-off state is adjusted, the hue of the display panel in the screen-off state is adjusted, and the problem of abnormal hue of the display panel in the screen-off state is improved.

Description

TECHNICAL FIELD

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

[0002] With the popularization of large-size display screens and folding screens, the PLP (English full name: Pol Less Panel, Chinese abbreviation: remove the polarizing plate of the display panel) technology is proposed. The PLP technology uses the BM (English full name: Black Matrix, Chinese abbreviation: black matrix) to block in the non-pixel area, which plays a role in preventing panel light leakage and reducing panel light reflectivity. The CF (English full name: Color Filter, Chinese abbreviation: color filter) is used in the pixel area, and the R / G / B color resistances of the CF are respectively corresponding to the light emitting devices in the pixel area. In this way, although the overall thickness of the functional layer can be reduced from 100 μm to less than 5 μm, and the panel light output rate can be increased from 42% to 60%, the color phase of the panel in the screen-off state will be affected. SUMMARY

[0003] Embodiments of the present application provide a display panel and a display device, which can adjust the color phase of the display panel in the screen-off state, and further improve the problem of abnormal color phase of the display panel in the screen-off state.

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

[0005] An array substrate comprising a plurality of TFT devices arranged in an array;

[0006] A light emitting device layer located above the array substrate, the light emitting device layer comprising a plurality of 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 resistances located in openings of the black matrix, the first color resistances corresponding to positions of the light emitting pixels;

[0008] The color filter layer further comprises a plurality of second color resistances, the plurality of second color resistances are arranged on a side of the black matrix away from the light emitting device layer, and are located between adjacent two of the openings on the black matrix.

[0009] In an embodiment, the first color resistance extends towards a peripheral edge of the opening and forms an extension, the extension is arranged along a periphery of the opening and covers part of the black matrix.

[0010] In an embodiment, the second color resistance and the first color resistance adjacent thereto are arranged at intervals.

[0011] In an embodiment, in the first color photoresists adjacent to the second color photoresist, a first sub-color photoresist of the same color as the second color photoresist is included, and the first sub-color photoresist partially overlaps the second color photoresist.

[0012] In an embodiment, the area of the black matrix is set as S1.

[0013] The overlapping area of the first color photoresists and the black matrix is set as S2.

[0014] The overlapping area of the second color photoresists and the black matrix is set as S3.

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

[0016] In an embodiment, the first color photoresists include a first red color photoresist, a first green color photoresist, and a first blue color photoresist.

[0017] The second color photoresists include a second red color photoresist, a second green color photoresist, and a second blue color photoresist.

[0018] The sum of the orthographic projection area of the first red color photoresist on the array substrate and the orthographic projection area of the second red color photoresist on the array substrate is S4.

[0019] The sum of the orthographic projection area of the first green color photoresist on the array substrate and the orthographic projection area of the second green color photoresist on the array substrate is S5.

[0020] The sum of the orthographic projection area of the first blue color photoresist on the array substrate and the orthographic projection area of the second blue color photoresist on the array substrate is S6.

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

[0022] In an 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 portion of the first color photoresist located in the opening.

[0023] In an embodiment, the second color photoresist includes a single-layer color photoresist pattern, and the color photoresist pattern and one of the first color photoresists adjacent thereto are of the same color.

[0024] In an embodiment, in the thickness direction of the display panel, the second color photoresist includes three layers of color photoresist patterns arranged in a stack, and the three layers of color photoresist patterns are of different colors.

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

[0026] In the display panel of the embodiment of the present application, the light emitting device layer is arranged on the array substrate, the color filter layer is arranged on the light emitting device layer, the color filter layer comprises a black matrix, the black matrix is provided with an opening at a position corresponding to a light emitting pixel of the light emitting device layer, and a first color resist is arranged at the opening; the PLP technology is realized by arranging the black matrix and the first color resist; meanwhile, a second color resist is arranged on a side of the black matrix away from the array substrate, and the second color resist is located between two adjacent openings on the black matrix; the second color resist is arranged to increase the coverage area of the color resist, so that the reflectivity of ambient light of the display panel in the screen-off state can be adjusted, the hue of the display panel in the screen-off state is adjusted, and the problem of abnormal hue of the display panel in the screen-off state is improved.

[0027] Other features and advantages of the present application will be described in detail in the following specific implementation part. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

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

[0030] Figure 1 The first color resist arrangement schematic diagram of the filter layer of the display panel provided by the embodiment of the present application is shown in the figure.

[0031] Figure 2 The second color resist arrangement schematic diagram of the filter layer of the display panel provided by the embodiment of the present application is shown in the figure.

[0032] Figure 3 The film layer diagram of the display panel provided by the embodiment of the present application is shown in the figure.

[0033] Figure 4 The mapping relationship diagram of the color resist coverage and the hue provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0034] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0035] The present application provides a display panel 100 and a display device. The following will be described in detail. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments.

[0036] The present application does not limit the specific form of the display device, and the display device can be an OLED display device. The display device provided by the embodiments of the present application can be applied to electronic equipment, and can be a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a vehicle-mounted display, and can also be a wearable device or any product or component with a display function, such as a smart watch, a smart bracelet, smart glasses, smart earphones, smart clothing, a head-mounted display, and the like.

[0037] In a first aspect, the present application provides a display panel 100, please refer to 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 an array of TFT devices (not shown in the figure). The light emitting device layer 2 is located above the array substrate 1 and includes an array of light emitting pixels 21. The color filter layer 3 includes a black matrix 31 and a plurality of first color resists 32 located in openings 33 of the black matrix 31. The first color resists 32 correspond in position to the light emitting pixels 21. The color filter layer 3 further includes a plurality of second color resists 34. The plurality of second color resists 34 are disposed on a side of the black matrix 31 facing away from the light emitting device layer 2 and are located between adjacent two of the openings 33 on the black matrix 31.

[0038] Hue is a basic property of color, referring to the basic color tone or pure color, which is the main feature to distinguish different colors, such as red, blue, green, etc. On a color wheel, hue can be represented by 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 color tone presented by the display panel 100 when the device is turned off or in a sleep state. In general, when the OLED panel is in a screen-off state, there is no pixel light emission, so in the ideal state, the display panel 100 presents a completely black color.

[0039] It can be known that generally, an encapsulation layer 4 is arranged above the array substrate 1, and the color filter layer 3 is arranged above the encapsulation layer 4, so as to form a COE (CF on Encapsulation) structure instead of a polarizer, which is beneficial to reduce power consumption, improve color gamut, thin the thickness, and improve the bending performance of the display panel 100. However, due to the black matrix 31 in the color filter layer 3, the display panel 100 is prevented from light leakage and light reflectivity, the first color resist 32 is arranged at the light emitting pixel 21, and in the screen-off state, due to the different ambient light reflectivity of the color filter layer 3 at positions corresponding to the black matrix 31 and the first color resist 32, the color phase of the display panel 100 in the screen-off state is affected, and the display panel 100 does not appear completely black in the screen-off state.

[0040] In the present application, the second color resist 34 is arranged on the side of the black matrix 31 away from the light emitting device layer 2, and the second color resist 34 is arranged at positions corresponding to adjacent two openings 33, so as to increase the coverage area of the color resist, which can adjust the reflectivity of ambient light of the display panel 100 in the screen-off state, thereby adjusting the color phase of the display panel 100 in the screen-off state, and further improving the problem of abnormal color phase of the display panel 100 in the screen-off state.

[0041] It can be understood that the black matrix 31 is provided with a plurality of openings 33 at positions corresponding to the light emitting pixels 21, and the area of the opening 33 is greater than or equal to the area of the light emitting pixel 21, so as to improve the light transmittance, and further improve the display effect of the display panel 100. In addition, the first color resist 32 is arranged at the opening 33, the light filtering spectrum of the first color resist 32 is consistent with the light emitting spectrum of the light emitting pixel 21, so as to ensure the display effect of the display panel 100.

[0042] The present application does not specifically limit the coverage area of the first color resist 32 and the second color resist 34. For example, when the color phase of the display panel 100 in the screen-off state is red, the total coverage rate of the red color resist can be adjusted and reduced, and the total coverage rate of the blue color resist or the green color resist can be increased, so as to correct the color phase of the display panel 100 in the screen-off state, and further improve the problem of abnormal color phase of the display panel 100 in the screen-off state.

[0043] In the field of color science and color management, CIELAB color space is a three-dimensional color model designed to match the perceptual difference of colors with numerical difference. In CIELAB color space, three dimensions are defined as: L* represents luminosity or brightness, from 0 (completely black) to 100 (completely white); a* represents chroma variation from green (negative value) to red (positive value); b* represents chroma variation from blue (negative value) to yellow (positive value). Hue is determined by both a* and b* parameters, because hue is actually an angular position on a color wheel, while a* and b* define a point on this two-dimensional plane.

[0044] In an embodiment of the present application, the first color resist 32 includes a first red color resist 321, a first green color resist 322, and a first blue color resist 323; the second color resist 34 includes 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 RGB color resist on the BM, and Table 1 is the coverage change value of RGB color resist on the BM.

[0045]

[0046] In the initial state, the coverage of 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 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 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 adjusting the first color resist 32 and the second color resist 34, please refer to Table 2. 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 is increased 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 is increased 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 is increased to 26%, the a* value is adjusted to 0.85, and the b* value is adjusted to -3.52.

[0048] In combination Figure 4As shown in the mapping relationship diagram of the color resistance coverage ratio and the hue, assuming that the area of the black matrix 31 is S1, the overlapping area of the first color resist 32 and the black matrix 31 is S2, the overlapping area of the second color resist 34 and the black matrix 31 is S3, (S2+S3) / S1 is greater than or equal to 80% and less than or equal to 100%, that is, when the total coverage ratio of the first color resist 32 and the second color resist 34 on the black matrix 31 is greater than 80%, the hue of the display panel 100 in the screen-off state can be adjusted by 1°-2°.

[0049] Further, the sum of the orthographic projection area of the first red color resist 321 on the array substrate 1 and the orthographic projection area of the second red color resist 341 on the array substrate 1 is S4, the sum of the orthographic projection area of the first green color resist 322 on the array substrate 1 and the orthographic projection area of the second green color resist 342 on the array substrate 1 is S5, and the sum of the orthographic projection area of the first blue color resist 323 on the array substrate 1 and the orthographic projection area of 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, the overlapping area of the G color resist on the black matrix 31 is set to be the largest, the overlapping area of the B color resist on the black matrix 31 is set to be the largest, and the overlapping area of the R color resist on the black matrix 31 is set to be the smallest, so that the hue of the display panel 100 in the screen-off state can be better corrected.

[0050] The present application does not make specific limitation on the way of increasing the coverage ratio of the first color resist 32 and the second color resist 34 on the black matrix 31.

[0051] Please refer to Figure 1 In the first embodiment of the present application, the first color resist 32 extends towards the periphery of the opening 33 and forms an extension 25, the extension 25 is arranged along the periphery of the opening 33 and covers part of the black matrix 31.

[0052] In the first embodiment, the overlapping area of the first color resist 32 and the black matrix 31 is increased to increase the coverage ratio of the RGB color resist on the black matrix 31, so as to adjust the reflectivity of the ambient light of the display panel 100 in the screen-off state, to adjust the hue of the display panel 100 in the screen-off state, and to further improve the problem of abnormal hue of the display panel 100 in the screen-off state.

[0053] Further refer to Figure 1The second color photoresist 34 and the first color photoresist 32 adjacent to the second color photoresist 34 are spaced apart; when the hue correction amplitude of the display panel 100 is small in the screen-off state, 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, so as to reduce the hue correction amplitude.

[0054] Please refer to Figure 2 In the second embodiment of the present application, the first color photoresist 32 adjacent to the second color photoresist 34 includes a first sub-color photoresist 32a of the same color as the second color photoresist 34, and the first sub-color photoresist 32a partially overlaps the second color photoresist 34.

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

[0056] And, when the first sub-color photoresist 32a is set to partially overlap the second color photoresist 34, the same-color first sub-color photoresist 32a and the second color photoresist 34 can be etched by one mask, so as to simplify the process.

[0057] In an 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 part of the first color photoresist 32 located in the opening 33; in this way, the same-color color photoresist in the first color photoresist 32 and the second color photoresist 34 can be made by the same process, so as to simplify the process of the color photoresist.

[0058] The present application does not make specific limitation on the thickness of the first color photoresist 32. In an embodiment, the thickness of the first color photoresist 32 is set to 1um-7um; which can be designed according to the actual product.

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

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

[0061] In an embodiment, in the thickness direction of the display panel 100, the second color resist 34 includes three layers of color resist patterns arranged in layers, and the three layers of color resist patterns are different in color; that is, the second color resist 34 includes a red color resist pattern, a green color resist pattern, and a blue color resist pattern arranged in layers; by arranging the three layers of color resist patterns in layers, on the one hand, the hue of the display panel 100 in the off-screen state can be adjusted; on the other hand, the light reflectivity can be reduced, the light reflectivity of the display panel 100 at all places in the off-screen state can be balanced, and the problem of visual difference in the display panel 100 in the off-screen state can be improved.

[0062] In an embodiment, a planar layer 5 is arranged on the side of the color filter layer 3 away from the array substrate 1, and an optical adhesive layer 6 is arranged on the 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 arranged as the display panel 100 described above, that is, the display panel 100 includes all the technical features of the display panel 100 described above, and the display device includes all the embodiments of the display panel 100 described above, and thus has all the technical effects of the embodiments described above, which will not be described here.

[0064] In the description of the present application, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0065] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

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

[0067] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present application, without departing from the technical solution of the present application, still falls within the scope of the technical solution of the present application.

Claims

1. A display panel, characterized in that, include: An array substrate, including an array of TFT devices; A light-emitting device layer is located above the array substrate, and the light-emitting device layer includes light-emitting pixels arranged in an array. as well as, A color filter layer is located above the light-emitting device layer. The color filter layer includes a black matrix and a plurality of first color photoresists located in the openings of the black matrix. The first color photoresists correspond to the positions of the light-emitting pixels. The color filter layer further includes a plurality of second color photoresists, which are disposed on the side of the black matrix away from the light-emitting device layer and located between two adjacent openings on the black matrix. Among the plurality of first color photoresists adjacent to the second color photoresists, there is a first sub-color photoresist with the same color as the second color photoresist, and the first sub-color photoresist partially overlaps with the second color photoresist.

2. The display panel as described in claim 1, characterized in that, The first colored photoresist extends toward the periphery of the opening and forms an extension portion, the extension portion being disposed circumferentially along the opening and covering a portion of the black matrix.

3. The display panel as described in claim 1, characterized in that, The second color photoresist and the adjacent first color photoresist are spaced apart.

4. The display panel as described in any one of claims 2 to 3, characterized in that, The area of ​​the black matrix is ​​set to S1; The overlap area between the plurality of first colored photoresists and the black matrix is ​​set to S2; The overlap area between 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%.

5. The display panel as described in claim 4, characterized in that, The plurality of the first color photoresists include a first red photoresist, a first green photoresist, and a first blue photoresist; The plurality of second color photoresists include a second red photoresist, a second green photoresist, and a second blue photoresist; The sum of the areas of the orthographic projection of the first red color resist on the array substrate and the orthographic projection of the second red color resist on the array substrate is S4; The sum of the areas of the orthographic projection of the first green color resist on the array substrate and the orthographic projection of the second green color resist on the array substrate is S5; The sum of the areas of the orthographic projection of the first blue color resist on the array substrate and the orthographic projection 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.

6. The display panel as described in claim 1, characterized in that, 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 portion of the first color photoresist located inside the opening.

7. The display panel as described in claim 1, characterized in that, The second color photoresist comprises a single-layer color photoresist pattern, wherein the color photoresist pattern is the same as one of the plurality of first color photoresists adjacent thereto.

8. The display panel as described in claim 1, characterized in that, In the thickness direction of the display panel, the second color photoresist includes three layers of color resist patterns stacked together, the three layers of color resist patterns having different colors.

9. A display device, characterized in that, Includes the display panel as described in any one of claims 1-8.

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