Display panel and display terminal

Abstract

The utility model relates to a display panel and a display terminal. The display panel comprises a substrate, a display layer and a brightening layer, the display layer comprises a plurality of pixel units, and each pixel unit comprises at least one first sub-pixel, at least one second sub-pixel and at least one third sub-pixel; the brightening layer comprises a plurality of brightening units, and one brightening unit corresponds to one pixel unit; the orthographic projection pattern of each sub-pixel in the same pixel unit on the substrate is symmetrically arranged about the first axis, and the orthographic projection pattern of any brightening unit on the substrate is symmetrically arranged about the corresponding first axis. The orthographic projection pattern of each sub-pixel in the same sub-pixel on the substrate is set to be symmetrical about the first axis, and the brightening units corresponding to the pixel units are set to be symmetrical about the first axis. The emergent light of the plurality of sub-pixels in the same pixel unit is still symmetric about the first axis after being emitted by the brightening unit, so that the asymmetric dispersion 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 terminal. BACKGROUND

[0002] Augmented reality (AR) technology has broad application prospects and great value. For example, augmented reality technology has great market potential in the fields of education, medical treatment, industrial manufacturing, entertainment and gaming, retail and marketing, tourism, intelligent driving, etc.

[0003] Micro light emitting diode (Micro LED) can realize high-resolution display and meet the application requirements of augmented reality technology. In order to improve the brightness of the display panel, a brightening layer is usually arranged in the display panel, and the prism includes a plurality of brightening units. Due to the process limitation, the size of the brightening unit cannot be reduced synchronously with the size of the sub-pixel. In the related technology, one brightening unit is usually arranged corresponding to one pixel unit. Since the light types output by the brightening unit for different color sub-pixels in the same pixel unit are different, it is easy to cause asymmetric dispersion, that is, the problem of asymmetric color deviation of viewing angle, which affects the viewing effect. UTILITY MODEL CONTENT

[0004] The embodiments of the present application provide a display panel and a display terminal, which improve the technical problem that asymmetric dispersion is easily caused due to different light types output by the brightening unit for different color sub-pixels in the same pixel unit.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a display panel is provided, comprising:

[0006] a substrate;

[0007] a display layer, comprising a plurality of pixel units, one pixel unit comprising at least one first sub-pixel, at least one second sub-pixel and at least one third sub-pixel;

[0008] a brightening layer arranged on the side of the display layer away from the substrate, the brightening layer comprising a plurality of brightening units, one brightening unit corresponding to one pixel unit;

[0009] wherein the projection pattern of each sub-pixel in the same pixel unit on the substrate is symmetrically arranged about a first axis, and the projection pattern of any brightening unit on the substrate is symmetrically arranged about the corresponding first axis.

[0010] Optionally, the projection pattern of each sub-pixel in the same pixel unit on the substrate is symmetric about a second axis, and the second axis is perpendicular to the first axis.

[0011] Optionally, the light emitting area of the second sub-pixel is larger than the light emitting area of the first sub-pixel, and the light emitting area of the first sub-pixel is larger than the light emitting area of the third sub-pixel.

[0012] Optionally, the second sub-pixel is arranged at the periphery of the first sub-pixel and the third sub-pixel.

[0013] Optionally, the first sub-pixel and the third sub-pixel are arranged along the extension direction of the first axis.

[0014] Optionally, the first sub-pixel is arranged at the periphery of the third sub-pixel.

[0015] Optionally, the first sub-pixel, the second sub-pixel and the third sub-pixel are arranged concentrically.

[0016] Optionally, the display layer comprises a light emitting unit and a color conversion layer arranged on the side of the light emitting unit away from the substrate, the light emitting unit comprises a first unit, a second unit and a third unit, and the color conversion layer comprises a red conversion part, a green conversion part and a transparent part.

[0017] The first unit and the red conversion part are located in the first sub-pixel, the second unit and the green conversion part are located in the second sub-pixel, and the third unit and the transparent part are located in the third sub-pixel.

[0018] Optionally, the projection pattern of the brightening unit on the substrate is a central symmetric pattern.

[0019] According to a second aspect of the present application, a display terminal is provided, which comprises the display panel described above.

[0020] In the display panel of the embodiments of the present application, by arranging the projection pattern of each sub-pixel in the same sub-pixel on the substrate to be symmetrical about the first axis, and arranging the brightening unit corresponding to the pixel unit to be symmetrical about the first axis, the outgoing light rays of the multiple sub-pixels in the same pixel unit are still symmetrical about the first axis after being emitted through the brightening unit, thereby improving the asymmetric dispersion.

[0021] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0023] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0024] FIG. 1A It is an image of a display screen with asymmetrical dispersion on a proportional display panel;

[0025] FIG. 1B It is a diagram showing the arrangement of pixel units on a proportional display panel;

[0026] FIG. 1C This is a proportional diagram of the color coordinate distribution of a display panel on the CIE 1931 chromaticity diagram.

[0027] FIG. 2 This is a top view of a display panel provided in an exemplary embodiment of this disclosure;

[0028] FIG. 3 yes FIG. 2 A schematic diagram of an enlarged structure of a pixel unit in a graph;

[0029] FIG. 4A yes FIG. 3 A schematic diagram of a cross-sectional structure at point C in the diagram;

[0030] FIG. 4B yes FIG. 3 A schematic diagram of a cross-sectional structure at point DD in the diagram;

[0031] FIG. 5 yes FIG. 2 A schematic diagram of another enlarged structure of a pixel unit;

[0032] FIG. 6 yes FIG. 2 A schematic diagram of another enlarged structure of a pixel unit;

[0033] FIG. 7 yes FIG. 4A The image shows the display screen of the display panel in the middle;

[0034] FIG. 8A This is a chromaticity offset curve diagram of one embodiment of this application;

[0035] FIG. 8B This is a brightness attenuation curve diagram of one embodiment of this application;

[0036] FIG. 9A yes FIG. 4A The color coordinate distribution of the display panel in the image on the CIE 1931 chromaticity diagram;

[0037] FIG. 9B yes FIG. 4AA graph showing the coordinates of the display panel in the CIE 1976 color space;

[0038] FIG. 10 This is a schematic diagram of the structure of a display terminal provided in an exemplary embodiment of this disclosure.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1-Display panel; AA-Display area; NA-Non-display area;

[0041] 10-Substrate;

[0042] 20 - Display layer; 21 - Pixel unit; 21a - First axis; 21b - Second axis; 211 - First sub-pixel; 212 - Second sub-pixel; 213 - Third sub-pixel; 22 - Light-emitting unit; 221 - First unit; 222 - Second unit; 223 - Third unit; 23 - Color conversion layer; 231 - Red conversion section; 232 - Green conversion section; 233 - Transparent section;

[0043] 30 - Brightening layer; 31 - Brightening unit;

[0044] 2-Display terminal; 3-Terminal body. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0046] To achieve the above objectives, according to the first aspect of this application, such as FIG. 2 to FIG. 6 As shown, a display panel 1 is provided, including a substrate 10, a display layer 20, and a brightness enhancement layer 30. The display layer 20 includes a plurality of pixel units 21, and each pixel unit 21 includes at least one first sub-pixel 211, at least one second sub-pixel 212, and at least one third sub-pixel 213. The brightness enhancement layer 30 is disposed on the side of the display layer 20 away from the substrate 10, and the brightness enhancement layer 30 includes a plurality of brightness enhancement units 31, and each brightness enhancement unit 31 is disposed corresponding to one pixel unit 21. The orthographic projection pattern of each sub-pixel in the same pixel unit 21 on the substrate 10 is symmetrically arranged about a first axis 21a, and the orthographic projection pattern of any brightness enhancement unit 31 on the substrate 10 is symmetrically arranged about the corresponding first axis 21a.

[0047] The display panel 1 can be a Micro-LED panel. The sub-pixels of the Micro-LED panel include Micro-LED chips, the size of the Micro-LED chips is less than 50 microns, and can even be 2 microns. The display panel 1 using the Micro-LED chips can achieve higher resolution and be suitable for augmented reality related products.

[0048] As shown in FIG. 2 , the display panel 1 includes a display area AA and a non-display area NA arranged at the periphery of the display area AA. The display area AA can be provided with a plurality of sub-pixels, and the sub-pixels can include red sub-pixels, green sub-pixels and blue sub-pixels to realize color display. The non-display area NA can be provided with a driving circuit such as a gate driving circuit, and the driving circuit can provide driving signals for the sub-pixels.

[0049] In some embodiments, the substrate 10 can be a sapphire substrate, a gallium nitride substrate, an aluminum nitride substrate, a silicon substrate, a gallium arsenide substrate, a silicon carbide substrate, and the like, but is not limited thereto. Among them, the silicon-based material has good flatness and crystal quality, can support the manufacture and integration of smaller size sub-pixels, and can realize extremely high resolution and pixel unit 21 density, meeting the requirements of near-eye display and the like for high-precision images.

[0050] As shown in FIG. 3 to FIG. 4B , the display layer 20 includes a plurality of pixel units 21, and each pixel unit 21 can present different colors and brightness. Each pixel unit 21 includes at least one first sub-pixel 211, at least one second sub-pixel 212 and at least one third sub-pixel 213. The colors of the first sub-pixel 211, the second sub-pixel 212 and the third sub-pixel 213 are different. For example, the first sub-pixel 211, the second sub-pixel 212 and the third sub-pixel 213 can be one of red sub-pixels, green sub-pixels and blue sub-pixels, respectively.

[0051] As shown in FIG. 4A and FIG. 4B , the brightening layer 30 is arranged on the light-emitting side of the display layer 20, and the brightening layer 30 includes a plurality of brightening units 31. The brightening unit 31 is a microstructure unit, and the brightening unit 31 can be a lens or the like. The surface of the brightening unit 31 has an arc shape, a triangular shape or the like.

[0052] FIG. 4A and FIG. 4BThe dashed arrow in the figure represents the path of the light. The light emitted from the pixel unit 21 enters the brightening unit 31 and is refracted on the surface of the brightening unit 31. The direction of the light changes after refraction. The surface of the brightening unit 31 can gather the light towards the normal viewing angle direction of the display panel 1, thereby improving the brightness of the display panel 1 in the normal viewing angle direction. The normal viewing angle direction of the display panel 1 refers to the direction perpendicular to the bearing surface of the substrate 10. The bearing surface of the substrate 10 is the surface of the substrate 10 close to the display layer 20.

[0053] With the increasing resolution of the display panel 1, the size of the sub-pixel is continuously reduced. Due to the limitations of the manufacturing process of the brightening unit 31, the size of the brightening unit 31 cannot be infinitely reduced, that is, the brightening unit 31 cannot match the size of a sub-pixel. Therefore, one brightening unit 31 is usually arranged corresponding to one pixel unit 21.

[0054] Due to the different positions of the multiple sub-pixels corresponding to the brightening unit 31, the distribution of the light emitted from the brightening unit 31 is different, which can cause asymmetric dispersion. The high-resolution display panel 1 is extremely sensitive to the emission position of the light. Asymmetric dispersion can cause serious color separation of the image and text, which seriously affects the viewing effect. FIG. 1A As shown in the related art, due to asymmetric dispersion, the viewing angle of the display image is asymmetrically deviated, the upper left corner is cyan, and the lower right corner is yellow, that is, the upper left corner is cold, and the lower right corner is warm, which seriously affects the viewing effect.

[0055] It should be noted that the cold color generally refers to blue, green, purple and the like. The warm color usually includes red, orange, yellow and the like. When the cold and warm colors are combined with each other, a strong visual contrast is formed, which is easy to be perceived by the human eye. For example, when one side of the display panel 1 is cold and the other side is warm, the color separation of the image and text is more likely to be perceived by the human eye, which affects the display effect of the display panel 1.

[0056] Since the black and white drawings can only show the difference in gray scale, they cannot accurately convey the cold and warm color deviation in the display image. The color drawings can show the effect of improving the cold and warm color deviation through real colors, so the color drawings are used in the present application. The use of color drawings can directly show and explain the beneficial effects of the present application.

[0057] In view of the above problems, as shown in FIG. 2 to FIG. 4BAs shown, in the display panel 1 of the present application, the orthographic projection pattern of each sub-pixel in the same pixel unit 21 on the substrate 10 is symmetrically arranged about the first axis 21a, so that the light emitted by the sub-pixels is symmetrically arranged about the first axis 21a; meanwhile, the orthographic projection pattern of the brightening unit 31 corresponding to the pixel unit 21 on the substrate 10 is symmetric about the first axis 21a, and the light emitted by the sub-pixels is still symmetric about the first axis 21a after refraction by the brightening unit 31, so that the light of any pixel unit 21 of the display panel 1 is symmetric about the first axis 21a corresponding to the pixel unit 21, thereby improving the asymmetric dispersion.

[0058] It should be noted that the orthographic projection pattern of each pixel unit 21 on the substrate 10 has a symmetry axis parallel to the row direction of the display panel 1, which is the first axis 21a. The first axis 21a is virtual and does not exist in reality. The symmetry axes of different pixel units 21 are different. The symmetry axis of the orthographic projection pattern of the pixel unit 21 on the substrate 10 is the same as the symmetry axis of the orthographic projection pattern of the brightening unit 31 corresponding to the pixel unit 21 on the substrate 10, that is, the orthographic projection pattern of the pixel unit 21 and the orthographic projection pattern of the brightening unit 31 are symmetrically arranged about the same first axis 21a.

[0059] The orthographic projection pattern of the sub-pixels in the same pixel unit 21 on the substrate 10 is symmetrically arranged about the first axis 21a, that is, the orthographic projection pattern of the first sub-pixel 211, the second sub-pixel 212 and the third sub-pixel 213 in the same pixel unit 21 is symmetrically arranged about the first axis 21a.

[0060] Optionally, as shown in FIG. 3 , FIG. 5 and FIG. 6 , the orthographic projection pattern of each sub-pixel in the same pixel unit 21 on the substrate 10 is symmetric about the second axis 21b, which is perpendicular to the first axis 21a. That is, the orthographic projection pattern of the sub-pixels in the same pixel unit 21 on the substrate 10 coincides with the original orthographic projection pattern after being rotated by 180 degrees. In other words, the orthographic projection pattern of the sub-pixels in the same pixel unit 21 on the substrate 10 has two symmetry axes, which are the first axis 21a and the second axis 21b perpendicular to the first axis 21a and passing through the center of the pixel unit 21.

[0061] In some embodiments, the first axis 21a is parallel to the row direction of the display panel 1, that is, the first axis 21a is parallel to the direction of the horizontal viewing angle of the human eye when viewing the display panel 1. The second axis 21b is parallel to the column direction of the display panel 1, that is, the second axis 21b is parallel to the direction of the vertical viewing angle of the human eye when viewing the display panel 1.

[0062] Since the human eye is more sensitive to the asymmetric dispersion of the display panel 1 in the up-down direction, by setting the first axis 21a to be parallel to the row direction of the display panel 1, it is more beneficial to reduce the asymmetric dispersion observed by the human eye in the vertical direction.

[0063] In some other embodiments, the first axis 21a can also be parallel to other directions of the bearing surface of the substrate 10, which is not limited in the present application.

[0064] By setting the orthographic projection pattern of the pixel unit 21 to be symmetrical about the first axis 21a, the asymmetric dispersion of the display panel 1 in the vertical direction can be improved; by setting the orthographic projection pattern of the pixel unit 21 to be symmetrical about the second axis 21b, the asymmetric dispersion of the display panel 1 in the horizontal direction can be improved, so that the display panel 1 is symmetrical in the horizontal and vertical directions, and the asymmetric dispersion is further improved.

[0065] Optionally, as shown in FIG. 3 , FIG. 5 and FIG. 6 , the light-emitting area of the second sub-pixel 212 is greater than that of the first sub-pixel 211, and the light-emitting area of the first sub-pixel 211 is greater than that of the third sub-pixel 213.

[0066] Since sub-pixels of different colors have different light-emitting efficiencies, the luminance of sub-pixels of different colors can be balanced by making the light-emitting areas of sub-pixels of different colors different. For example, since the light-emitting efficiency of green sub-pixels is lower than that of red sub-pixels, the light-emitting area of green sub-pixels can be set to be greater than that of red sub-pixels. Since the light-emitting efficiency of red sub-pixels is lower than that of blue sub-pixels, the light-emitting area of red sub-pixels can be set to be greater than that of blue sub-pixels.

[0067] In some embodiments, the value of the light-emitting area of the first sub-pixel 211: the light-emitting area of the second sub-pixel 212: the light-emitting area of the third sub-pixel 213 is 3:5:2.

[0068] In some embodiments, the value of the light-emitting area of the first sub-pixel 211: the light-emitting area of the second sub-pixel 212: the light-emitting area of the third sub-pixel 213 is 4:5:1.

[0069] In some embodiments, the value of the light-emitting area of the first sub-pixel 211: the light-emitting area of the second sub-pixel 212: the light-emitting area of the third sub-pixel 213 is 3:6:1.

[0070] In some embodiments, the value of the light-emitting area of the first sub-pixel 211: the light-emitting area of the second sub-pixel 212: the light-emitting area of the third sub-pixel 213 is 2.5:7:0.5.

[0071] Optionally, such as FIG. 3 , FIG. 5 and FIG. 6 As shown, the second sub-pixel 212 is disposed around the first sub-pixel 211 and the third sub-pixel 213. This means that the second sub-pixel 212 can surround the first sub-pixel 211 and the third sub-pixel 213. Since the second sub-pixel 212 is disposed around the first sub-pixel 211 and the third sub-pixel 213, the perimeter of the second sub-pixel 212 is greater than the perimeter of the first sub-pixel 211 and the third sub-pixel 213, making it easier for the light-emitting area of ​​the second sub-pixel 212 to be larger than the light-emitting areas of the first sub-pixel 211 and the third sub-pixel 213.

[0072] Optionally, such as FIG. 3 As shown, the first sub-pixel 211 and the third sub-pixel 213 are arranged along the extension direction of the first axis 21a. That is to say, the first sub-pixel 211 and the third sub-pixel 213 are arranged along the row direction of the display panel 1, and both the first sub-pixel 211 and the third sub-pixel 213 are symmetrical about the first axis 21a.

[0073] In some embodiments, such as FIG. 3 As shown, pixel unit 21 includes two first sub-pixels 211, one second sub-pixel 212, and one third sub-pixel 213. The two first sub-pixels 211 are respectively disposed on the left and right sides of the second sub-pixel 212. The second sub-pixel 212 can be circular, surrounding the first sub-pixel 211 and the third sub-pixel 213.

[0074] In some embodiments, such as FIG. 3 As shown, the shape and size of a first sub-pixel 211 and a third sub-pixel 213 can be the same.

[0075] Optionally, such as FIG. 5 and FIG. 6 As shown, the first sub-pixel 211 is located around the third sub-pixel 213.

[0076] In some embodiments, pixel unit 21 includes a first sub-pixel 211, a second sub-pixel 212, and a third sub-pixel 213. The first sub-pixel 211 is disposed around the third sub-pixel 213, and the second sub-pixel 212 is disposed around the first sub-pixel 211. That is, the first sub-pixel 211 and the second sub-pixel 212 are both circular, and the third sub-pixel 213 is disposed within the circular ring of the first sub-pixel 211.

[0077] It should be noted that the annular refers to a closed structure with the head connected to the tail. The outer contour of the annular can be a regular pattern such as a circular, a regular polygon, and the like central symmetric pattern. The outer contour of the annular can be an irregular pattern such as a combination of an arc and a straight line forming a central symmetric pattern. FIG. 5 The outer contour of the annular in FIG. 6 The outer contour of the annular in FIG. 5 The difference between FIG. 6 lies in the radius of the arc.

[0078] Optionally, as shown in FIG. 5 and FIG. 6 , the first sub-pixel 211, the second sub-pixel 212 and the third sub-pixel 213 are arranged concentrically. That is, the geometric centers of the first sub-pixel 211, the second sub-pixel 212 and the third sub-pixel 213 coincide. Through the above arrangement, the light emitting centers of the first sub-pixel 211, the second sub-pixel 212 and the third sub-pixel 213 can be made to coincide, further improving the asymmetric dispersion.

[0079] Optionally, as shown in FIG. 4A and FIG. 4B , the display layer 20 includes a light emitting unit 22 and a color conversion layer 23 arranged on the side of the light emitting unit 22 away from the substrate 10, the light emitting unit 22 includes a first unit 221, a second unit 222 and a third unit 223, and the color conversion layer 23 includes a red conversion part 231, a green conversion part 232 and a transparent part 233; wherein the first unit 221 and the red conversion part 231 are located in the first sub-pixel 211, the second unit 222 and the green conversion part 232 are located in the second sub-pixel 212, and the third unit 223 and the transparent part 233 are located in the third sub-pixel 213.

[0080] In some embodiments, the light emitting unit 22 can be a Micro LED light emitting chip. The light emitting unit 22 can be a blue LED, an ultraviolet LED or an LED of other colors. When the light emitting units 22 are of the same color, the manufacturing process of the display panel 1 can be simplified.

[0081] For example, a blue LED epitaxial wafer can be bonded to the substrate 10, and then a patterning process is used to form the light emitting unit 22. In this way, the shape of the light emitting unit 22 can be set according to actual needs.

[0082] In some embodiments, the light emitting unit 22 is a blue LED. The red conversion part 231 can convert the blue light emitted by the first unit 221 into red light. The green conversion part 232 can convert the blue light emitted by the second unit 222 into green light. The transparent part 233 does not change the color of the light emitted by the third unit 223, and the light emitted from the transparent part 233 is blue light. Through the above arrangement, full-color display can be realized.

[0083] Since the light emitted by the light emitting units 22 is of the same color, in order to convert the light of the same color into colored light, a color conversion layer 23 can be provided on the light emitting surface side of the light emitting units 22. The color conversion layer 23 can convert the short-wavelength light (such as blue light) emitted by the Micro LED into light of other colors (such as red light and green light).

[0084] In some embodiments, the color conversion layer 23 can be quantum dot material. When a quantum dot is excited by external energy (light, electricity), it will emit light of a specific frequency, and the frequency of the emitted light will change with the size of the quantum dot, so the color of the light emitted by the quantum dot can be controlled by adjusting the size of the quantum dot.

[0085] In some embodiments, the quantum dot material can include a core-shell structure or an alloy structure composed of at least one of CdSe (cadmium selenide), CdS (cadmium sulfide), ZnSe (zinc selenide), ZnS (zinc sulfide), InP (indium phosphide), CdTe (cadmium telluride), ZnTe (zinc telluride), and AgInGaS (silver indium gallium sulfide).

[0086] It should be noted that the light emitting area of the sub-pixel is determined by the light emitting unit 22 and the corresponding color conversion layer 23. For example, the light emitting area of the first sub-pixel 211 is determined by the first unit 221 and the red conversion part 231. The light emitting area of the second sub-pixel 212 is determined by the second unit 222 and the green conversion part 232. The light emitting area of the third sub-pixel 213 is determined by the third unit 223 and the transparent part 233. The first unit 221 and the red conversion part 231 are arranged in register, and the light emitted from the first unit 221 can be incident into the red conversion part 231. The second unit 222 and the green conversion part 232 are arranged in register, and the light emitted from the second unit 222 can be incident into the green conversion part 232. The third unit 223 and the transparent part 233 are arranged in register, and the light emitted from the third unit 223 can be incident into the transparent part 233.

[0087] In some embodiments, the orthographic projection pattern of the first unit 221 on the substrate 10 can coincide with the orthographic projection pattern of the red conversion part 231 on the substrate 10.

[0088] In some other embodiments, the orthographic projection pattern of the red conversion part 231 on the substrate 10 can be slightly larger than the orthographic projection pattern of the first unit 221 on the substrate 10, so that as much light as possible emitted from the first unit 221 can be incident into the red conversion part 231.

[0089] Similarly, the orthographic projection pattern of the second unit 222 on the substrate 10 can overlap with the orthographic projection pattern of the green conversion unit 232 on the substrate 10. The orthographic projection pattern of the green conversion unit 232 on the substrate 10 can be slightly larger than the orthographic projection pattern of the second unit 222 on the substrate 10, so that as much light emitted from the second unit 222 as possible is incident into the green conversion unit 232.

[0090] The orthographic projection pattern of the third unit 223 on the substrate 10 can overlap with the orthographic projection pattern of the transparent part 233 on the substrate 10. The orthographic projection pattern of the transparent part 233 on the substrate 10 can be slightly larger than the orthographic projection pattern of the third unit 223 on the substrate 10, so that as much light emitted from the third unit 223 as possible can enter the transparent part 233.

[0091] like FIG. 4A and FIG. 4B As shown, to avoid light crosstalk between two adjacent sub-pixels, a barrier can be provided between the red conversion unit 231, the green conversion unit 232, and the transparent unit 233. The barrier is made of an opaque material. For example, the barrier can be metal.

[0092] Optionally, the orthographic projection pattern of the brightness enhancement unit 31 on the substrate 10 is a centrally symmetrical pattern. That is to say, the orthographic projection pattern of the brightness enhancement unit 31 on the substrate 10 coincides with the original orthographic projection pattern after being rotated 180 degrees. Through the above setting, asymmetric dispersion can be further improved.

[0093] This application provides a comparative example, such as FIG. 1B As shown in the comparative example, a pixel unit comprises four sub-pixels: one red sub-pixel R, two green sub-pixels G, and one blue sub-pixel B, arranged in an array of four sub-pixels. FIG. 1A The image shown is a comparative display image. The upper left corner is bluish, and the lower right corner is yellowish, which seriously affects the viewing experience. When viewed at a vertical optical axis tilt of ±15 degrees, the color difference between warm and cool tones in the comparative display reaches 5.2 JNCD.

[0094] like FIG. 7 As shown, the images displayed on the display panel 1 provided in the embodiments of this application are symmetrical in both the horizontal and vertical directions, thereby improving asymmetric dispersion. To illustrate the improvement effect of the embodiments of this application, FIG. 7 Colored patterns were used. For example... FIG. 7 As shown, the displayed image has a yellowish tint in the upper left and lower right corners, thus improving the separation of warm and cool colors. In the embodiments of this application, due to the symmetrical light pattern of sub-pixels of different colors, the color difference between warm and cool colors is reduced to 0 JNCD, and the absolute color difference is only 0.8 JNCD. The color difference between warm and cool colors refers to the difference in color between cool and warm colors.

[0095] Specifically, please refer to FIG. 8A the chromaticity shift curve diagram shown. The horizontal coordinate is the horizontal viewing angle value, and the vertical coordinate is the chromaticity value. It can be known from the chromaticity shift curve diagram that the chromaticity value is consistent at 15 degrees and -15 degrees, that is, the color difference between cold and warm is 0 JNCD. FIG. 8A

[0096] As shown in the luminance attenuation curve diagram shown in FIG. 8B , the horizontal coordinate is the horizontal viewing angle value, and the vertical coordinate is the normalized luminance value. It can be known from the luminance attenuation curve diagram that the luminance of the display panel is different at different viewing angles. In order to respectively illustrate the corresponding relationship between the viewing angle and the luminance of RGB, FIG. 8B FIG. 8A and FIG. 8B all use color pictures. The R curve refers to the corresponding relationship curve between the viewing angle and the luminance when the red picture is displayed, the G curve refers to the corresponding relationship curve between the viewing angle and the luminance when the green picture is displayed, the B curve refers to the corresponding relationship curve between the viewing angle and the luminance when the blue picture is displayed, and the W curve refers to the corresponding relationship curve between the viewing angle and the luminance when the white picture is displayed.

[0097] As shown in the CIE 1931 chromaticity diagram of FIG. 1C and FIG. 9A , the CIE 1931 chromaticity diagram is a two-dimensional plane diagram established based on the CIE 1931 standard chromaticity system. It uses the proportion of three primary colors that make up a certain color to define the color, adopts X, Y, Z three virtual “primary colors”, maps all visible colors to a three-dimensional space through linear combination in mathematics, and then draws by normalizing X, Y, Z into x, y, z chromaticity coordinates. The point close to the center of the diagram is white, and its chromaticity coordinates are X=0.3101, Y=0.3162, and Z=0.3737. In order to show the color range in the chromaticity diagram and describe the color deviation, the color pictures are used in the present application. FIG. 1C , FIG. 9A

[0098] The CIE 1931 chromaticity diagram can be roughly divided into three areas, the upper left area, the lower left area and the right side area. Among them, the upper left area is green, the lower left area is purple, and the right side area is red. When the chromaticity coordinates of the display panel 1 are located in the same area, the color difference between cold and warm is small. When the chromaticity coordinates of the display panel 1 are located in different areas, the color difference between cold and warm is large.

[0099] As shown in FIG. 1C , in the comparative example, the black curve shows the chromaticity coordinate values of the display panel 1 at different viewing angles, and the black curve crosses the lower left area and the right side area, and the color difference between cold and warm reaches 5.2 JNCD, and the asymmetric color deviation is serious.

[0100] While in the embodiment of the present application, as shown in FIG. 9A ​​​As shown, the black curve shows the chromaticity coordinate values of the display panel 1 at different viewing angles, and the chromaticity coordinates of the display panel 1 at different viewing angles are all located in the upper left area, that is, the black curve is located in the same color range, and there is no cold-warm color difference, that is, the cold-warm color difference is 0 JNCD. The absolute color difference refers to the color difference between the two endpoints of the black curve, and the absolute color difference of the embodiment of the present application is 0.8 JNCD.

[0101] Referring to FIG. 9B CIE 1976, which is a uniform color space system proposed by the International Commission on Illumination (CIE) in 1976, in the CIE 1976 color space, u' and v' are uniform chromaticity coordinates, which are calculated based on X, Y, Z in the CIE 1931 standard chromaticity system, and are used to more accurately describe the color characteristics in terms of chromaticity. In the CIE 1931 chromaticity diagram, the same coordinate distance does not necessarily correspond to the same color difference perceived by the human eye, but in the CIE 1976 uniform chromaticity scale diagram based on u' and v', the same distance on the coordinate is closer to equal color difference in visual perception, making the comparison and evaluation of colors more in line with the actual perception of the human eye. Using u' and v' can more accurately determine whether the difference between two colors is within an acceptable range. FIG. 9B It can be seen that the abscissa is u' and the ordinate is v'. In order to describe the distribution range of colors, FIG. 9B A color picture is adopted. FIG. 9B The color coordinates at different horizontal viewing angles and the color coordinates at 0-degree viewing angle are shown. In CIE 1976, the viewing angle color deviation of the embodiment of the present application is completely symmetrical, and the asymmetrical dispersion is improved.

[0102] According to the second aspect of the present application, as FIG. 10 shown, a display terminal 2 is provided, which includes the display panel 1 described above.

[0103] In the present embodiment, as FIG. 10 shown, the display terminal 2 includes the display panel 1 and a terminal body 3, and the display panel 1 and the terminal body 3 are combined into one.

[0104] In the present embodiment, the display terminal 2 can be: a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, or any product or component with display function. The display terminal 2 can realize high resolution, and is particularly suitable for augmented reality products.

[0105] In the description of the application, the terms "first", "second", etc. are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0106] 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.

[0107] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0108] The above is only the 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 in accordance with the technical essence of the present application without departing from the technical solution content of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a display layer comprising a plurality of pixel units, one of the pixel units comprising at least one first sub-pixel, at least one second sub-pixel and at least one third sub-pixel; a brightening layer disposed on a side of the display layer away from the substrate, the brightening layer comprising a plurality of brightening units, one of the brightening units corresponding to one of the pixel units; wherein the orthographic projection pattern of each sub-pixel in the same pixel unit on the substrate is symmetrically disposed about a first axis, and the orthographic projection pattern of any brightening unit on the substrate is symmetrically disposed about the corresponding first axis.

2. The display panel of claim 1, wherein, The orthographic projection pattern of each sub-pixel in the same pixel unit on the substrate is symmetric about a second axis, the second axis being perpendicular to the first axis.

3. The display panel of claim 2, wherein, The light-emitting area of the second sub-pixel is greater than that of the first sub-pixel, and the light-emitting area of the first sub-pixel is greater than that of the third sub-pixel.

4. The display panel of claim 3, wherein, The second sub-pixel is disposed at the periphery of the first sub-pixel and the third sub-pixel.

5. The display panel of claim 4, wherein, The first sub-pixel and the third sub-pixel are arranged along the extension direction of the first axis.

6. The display panel of claim 4, wherein, The first sub-pixel is disposed at the periphery of the third sub-pixel.

7. The display panel of claim 6, wherein, The first sub-pixel, the second sub-pixel and the third sub-pixel are concentrically disposed.

8. The display panel of any one of claims 1 to 7, wherein, The display layer comprises a light-emitting unit and a color conversion layer disposed on a side of the light-emitting unit away from the substrate, the light-emitting unit comprising a first unit, a second unit and a third unit, and the color conversion layer comprising a red conversion part, a green conversion part and a transparent part; wherein the first unit and the red conversion part are located in the first sub-pixel, the second unit and the green conversion part are located in the second sub-pixel, and the third unit and the transparent part are located in the third sub-pixel.

9. The display panel of any one of claims 1 to 7, wherein, The orthographic projection pattern of the brightening unit on the substrate is a central symmetric pattern.

10. A display terminal, characterized by The display panel comprises any one of claims 1 to 9.

Images