Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a light source, a reflecting layer, an array substrate and a color film substrate which are sequentially arranged in the first direction, and the first direction is perpendicular to the array substrate; the reflecting layer comprises a plurality of reflecting units, the reflecting units are arranged at intervals in the direction parallel to the array substrate, and orthographic projections of the reflecting units on the array substrate are overlapped with orthographic projections of the first sub-pixels on the array substrate; the reflection unit is configured to transmit a first light ray, the first light ray is a light ray of a preset wave band emitted by the light source, and the color film substrate is configured to filter the first light ray into a first color light.

Description

Technical Field

[0001] The present invention relates to display technology, and more particularly to a display panel and a display device. Background Art

[0002] Liquid crystal display (LCD) has the characteristics of small size, low power consumption and no radiation, and has been developed rapidly. The liquid crystal display panel includes an array substrate of thin film transistors and a color filter substrate. Liquid crystal molecules are arranged between the array substrate and the color filter substrate. By controlling the common electrode and the pixel electrode, an electric field is formed to drive the liquid crystal deflection to achieve grayscale display. Summary of the invention

[0003] An embodiment of the present application provides a display panel, the display panel comprising a plurality of pixel units arranged in an array, each of the pixel units comprising at least four sub-pixels, the at least four sub-pixels comprising a first sub-pixel, the first sub-pixel being configured to emit a first color light; the display panel comprising a light source, a reflective layer, an array substrate and a color filter substrate arranged in sequence in a first direction, the first direction being perpendicular to the array substrate;

[0004] The reflective layer comprises a plurality of reflective units, the plurality of reflective units are arranged at intervals in a direction parallel to the array substrate, and the orthographic projections of the reflective units on the array substrate overlap with the orthographic projections of the first sub-pixel on the array substrate;

[0005] The reflection unit is configured to transmit a first light, where the first light is a light of a preset wavelength band emitted by the light source, and the color film substrate is configured to filter the first light into the first color light.

[0006] In some exemplary embodiments, the reflection unit is configured as a distributed Bragg reflector.

[0007] In some exemplary embodiments, the at least four sub-pixels further include a second sub-pixel, a third sub-pixel and a fourth sub-pixel, the second sub-pixel being configured to emit a second color light, the third sub-pixel being configured to emit a third color light, and the fourth sub-pixel being configured to emit a fourth color light;

[0008] The first color light is set to green light, and one of the second color light, the third color light, and the fourth color light is set to green light or yellow light.

[0009] In some exemplary embodiments, the first color light is green light, and under the BT2020 standard, the color gamut range of the first color light is greater than or equal to 89%.

[0010] In some exemplary embodiments, the display panel further comprises a first substrate and a flat layer, wherein the first substrate is located between the array substrate and the light source, and the flat layer is located on a side of the first substrate close to the array substrate;

[0011] The planar layer is provided with a plurality of first through holes arranged at intervals in a direction parallel to the array substrate, the plurality of reflection units correspond to the plurality of first through holes one by one, and the reflection units are arranged in the first through holes.

[0012] In some exemplary embodiments, the display panel further includes a first substrate and a flat layer located between the array substrate and the light source, and the first substrate, the reflective layer and the flat layer are sequentially stacked in a direction away from the light source;

[0013] The first substrate is provided with a plurality of first grooves on the end face away from the light source, and the plurality of first grooves are arranged at intervals in a direction parallel to the array substrate. The plurality of reflection units correspond to the plurality of first grooves one by one, and one end of the reflection unit close to the light source is arranged in the first groove, and the flat layer covers the end face of the reflection unit away from the light source.

[0014] In some exemplary embodiments, the array substrate includes a buffer layer and a semiconductor layer which are sequentially stacked in a direction away from the planar layer, and the buffer layer covers an end surface of the planar layer away from the first substrate.

[0015] In some exemplary embodiments, the display panel further includes a polarizing layer and a plurality of grating structures, wherein the polarizing layer is located on a side of the first substrate close to the light source;

[0016] The plurality of grating structures correspond to the plurality of first through holes in a one-to-one manner, the grating structures are arranged on the first substrate and located in the first through holes, and the reflection unit covers the end surface of the grating structure away from the first substrate;

[0017] The orthographic projections of the multiple grating structures on the array substrate do not overlap with the orthographic projection of the polarizing layer on the array substrate.

[0018] In some exemplary embodiments, the polarizing layer is provided with a plurality of second through holes spaced apart in a direction parallel to the array substrate, and the orthographic projections of the plurality of grating structures on the array substrate are located within the orthographic projections of the plurality of second through holes on the array substrate.

[0019] In some exemplary embodiments, the grating structure is configured to have a polarization degree greater than 0.9 for light in a first wavelength band, and a transmittance of the grating structure for light in the first wavelength band is not less than 44.5%, and the first wavelength band is configured to be 510nm to 550nm.

[0020] In some exemplary embodiments, the display panel further includes a first substrate, the first substrate is located between the reflective layer and the array substrate, and the plurality of reflective units are arranged on an end surface of the first substrate away from the array substrate.

[0021] In some exemplary embodiments, the reflection unit includes a plurality of first reflection layers and a plurality of second reflection layers alternately stacked in the first direction, and materials of the first reflection layers and materials of the second reflection layers are different;

[0022] The thickness of the first reflective layer is set to the size of the first reflective layer in the first direction, and the thickness of the second reflective layer is set to the size of the second reflective layer in the first direction;

[0023] At least two of the plurality of first reflective layers have unequal thicknesses, and at least two of the plurality of second reflective layers have unequal thicknesses.

[0024] In some exemplary embodiments, a material of the first reflective layer includes silicon dioxide, and a material of the second reflective layer includes niobium pentoxide.

[0025] In some exemplary embodiments, the color filter substrate includes a plurality of filters spaced apart in a direction parallel to the array substrate, the plurality of filters include a plurality of first filters, and the first filters are configured to filter the first light into the first color light;

[0026] The orthographic projection of the reflection unit on the array substrate is located within the orthographic projection of the first filter on the array substrate.

[0027] An embodiment of the present application provides a display device, including the above-mentioned display panel.

[0028] The display panel of the embodiment of the present application has a reflective layer on the side of the array substrate away from the color filter layer, which can modulate the emission spectrum of the first sub-pixel and improve the color gamut of the device. The pixel unit of the display panel of the embodiment of the present application has an additional first sub-pixel compared to the related art, which can improve the display brightness. The pixel unit of the display panel of the embodiment of the present application has an additional sub-pixel that emits yellow light, and the sub-pixel that emits yellow light can provide more brightness for the display, so that the first sub-pixel improves the color gamut. The display panel of the embodiment of the present application has a grating structure in the reflective layer, so that the reflective layer has both filtering and polarization modulation functions, reducing the light loss of the polarizing layer. The display panel of the embodiment of the present application can prepare the reflective layer on the side of the first substrate away from the array substrate, reduce the step difference of the array substrate, and improve the yield. The display panel of the embodiment of the present application has a groove (i.e., the first groove) on the first substrate to accommodate the reflective unit, which can reduce the step difference of the array substrate, and the flatness of the array substrate is higher.

[0029] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained by the schemes described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0031] Figure 1 is a schematic diagram of a display panel of the present exemplary embodiment;

[0032] Figure 2 is a schematic diagram of a planar structure of a display panel of this exemplary embodiment;

[0033] Figure 3 for Figure 1 BB section diagram in FIG.

[0034] Figure 4 is a schematic cross-sectional view of a reflection unit of this exemplary embodiment;

[0035] Figure 5 for Figure 4 Schematic diagram of the spectrum of the reflection unit in air;

[0036] Figure 6 for Figure 1 A partial enlarged schematic diagram in the middle;

[0037] Figure 7 is a schematic diagram of another display panel of this exemplary embodiment;

[0038] Figure 8 for Figure 7 A local enlarged schematic diagram of point C in FIG.

[0039] Fig. 9 is a schematic diagram of another display panel according to the exemplary embodiment;

[0040] Fig.10 is a schematic diagram of another display panel of this exemplary embodiment;

[0041] Fig.11 for Fig.10 A local enlarged schematic diagram of point D in FIG.

[0042] Fig.12 for Fig.10 Schematic diagram of display panel preparation. DETAILED DESCRIPTION

[0043] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0044] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application may also be combined with any conventional features or elements to form a unique invention scheme. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme. Therefore, it should be understood that any feature shown and / or discussed in the present application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0045] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be understood by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0046] Virtual reality (VR) and augmented reality (AR) technologies have been widely used in many fields such as education, entertainment, social interaction and scientific research. AR and VR technologies have put forward higher requirements on the color gamut of display devices, that is, display devices need high color gamut display. Liquid crystal display devices usually use blue light LED as backlight, and color film is composed of quantum dots (QD) or phosphors; the color gamut of liquid crystal display devices can be determined by the backlight and color film, that is, the backlight and color film determine the color gamut level of the display device to a certain extent. At present, the means to improve the color gamut of liquid crystal display devices is usually to increase the thickness of the color film, but this means will reduce the brightness of the liquid crystal display device and increase power consumption. In particular, the liquid crystal display devices on portable devices have more stringent requirements on power consumption and battery life. The method of simply increasing the thickness of the color film to improve the color gamut is not suitable for liquid crystal display devices on portable devices.

[0047] Figure 1 is a schematic diagram of a display panel of this exemplary embodiment, Figure 2 is a schematic diagram of a planar structure of a display panel of the exemplary embodiment. The embodiment provides a display panel such as Figure 1 and Figure 2As shown, the display panel may include a plurality of pixel units P arranged in an array, each pixel unit may include at least four sub-pixels, and the at least four sub-pixels may include a first sub-pixel P1, and the first sub-pixel P1 is configured to emit a first color light. The display panel may include a light source 100, a reflective layer 700, an array substrate 200, and a color filter substrate 300 arranged in sequence in a first direction, and the first direction may be perpendicular to the array substrate 200. The reflective layer 700 may include a plurality of reflective units 701, and the plurality of reflective units 701 may be arranged at intervals in a direction parallel to the array substrate 200, and the orthographic projection of the reflective unit 701 on the array substrate 200 may overlap with the orthographic projection of the first sub-pixel P1 on the array substrate 200. The reflective unit 701 is configured to transmit a first light, and the first light may be a light of a preset wavelength band emitted by the light source 100, and the color filter substrate 300 is configured to filter the first light into a first color light. The display panel of this exemplary embodiment has a reflective layer on the side of the array substrate away from the color filter layer, and the emission spectrum of the first sub-pixel can be modulated to improve the color gamut of the device.

[0048] In some exemplary embodiments, Figure 2As shown, the display panel may include a plurality of pixel units P arranged in a matrix, and at least one pixel unit P may include a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, a third sub-pixel P3 emitting a third color light, and a fourth sub-pixel P4 emitting a fourth color light. In some exemplary embodiments, the first sub-pixel P1 may be a first green sub-pixel (G1) emitting a green light, the second sub-pixel P2 may be a second green sub-pixel (G2) emitting a green light, the third sub-pixel P3 may be a red sub-pixel (R) emitting a red light, and the fourth sub-pixel P4 may be a blue sub-pixel (B) emitting a blue light, the first color light and the second color light may be green light, the third color light may be red light, and the fourth color light may be blue light. However, the third sub-pixel P3 may be a blue sub-pixel (B) emitting a blue light, the fourth sub-pixel P4 may be a red sub-pixel (R) emitting a red light, the third color light may be a blue light, and the fourth color light may be a red light. However, the present invention is not limited thereto, the third sub-pixel P3 may be a blue sub-pixel (B) emitting a blue light, the fourth sub-pixel P4 may be a red sub-pixel (R) emitting a red light, the third color light may be a blue light, and the fourth color light may be a red light. In some exemplary embodiments, the shape of the sub-pixel may be rectangular, but not limited thereto, for example, it may be a rhombus, a pentagon or a hexagon, and the four sub-pixels may be arranged in a horizontal parallel, vertical parallel or in a zigzag manner, which is not limited in the present disclosure. In some exemplary embodiments, the first sub-pixel P1, the second sub-pixel P2, the third sub-pixel P3 and the fourth sub-pixel P4 may be arranged along a straight line, that is, extending along the second direction, the second direction and the third direction are parallel to the array substrate, and the second direction is perpendicular to the third direction, but not limited thereto, for example, the first sub-pixel P1, the second sub-pixel P2, the third sub-pixel P3 and the fourth sub-pixel P4 may be arranged in a non-straight line such as a rhombus arrangement; for another example, in a pixel unit, in the first direction, the first sub-pixel P1, the fourth sub-pixel P4, the second sub-pixel P2 and the third sub-pixel P3 are arranged in sequence. The pixel unit of the display panel of this example adds the first sub-pixel P1 and the first color light relative to the related art, which can improve the brightness of the display panel.

[0049] In some exemplary embodiments, Figure 1 and Figure 2As shown, the display panel further includes a first substrate 600, a second substrate 500 and a liquid crystal layer 400, and the light source 100, the first substrate 600, the reflective layer 700, the array substrate 200, the liquid crystal layer 400, the second substrate 500 and the color film substrate 300 are sequentially stacked in a first direction. The light source 100 can emit light to the array substrate 200, and the light can pass through the array substrate 200 and the liquid crystal layer 400 to reach the color film substrate 300, and the color film substrate 300 can filter the light emitted by the light source 100 into the first color light, the second color light, the third color light and the fourth color light mentioned above. The first substrate 600 and the second substrate 500 can both be glass substrates, but are not limited thereto. For example, the first substrate 600 and the second substrate 500 can be substrates of other materials that can transmit light.

[0050] Figure 3 for Figure 1 In the BB cross-sectional diagram, in some exemplary embodiments, as Figure 1 and Figure 3As shown, the color filter substrate 300 may be arranged on the second substrate 500 and located on the side of the second substrate 500 away from the light source 100. The color filter substrate 300 may include a black matrix 302 and a plurality of filters 301 spaced in a direction parallel to the array substrate 200. The black matrix 302 is provided with a plurality of matrix openings 303. The matrix openings 303 penetrate the black matrix 302 in the first direction. The plurality of matrix openings 303 are arranged in a matrix in a plane formed by the second direction and the third direction. The matrix openings 303 may be rectangular holes, but are not limited thereto. For example, the matrix openings 303 may be diamond holes, circular holes, etc. The plurality of filters 301 may be arranged one-to-one with the plurality of matrix openings 303. The filters 301 may be arranged in the matrix openings 303. The black matrix 302 may prevent light from crossing between the filters 301. The plurality of filters 301 may include a first filter 304, a second filter 305, a third filter 306, and a fourth filter 307. The orthographic projection of the reflection unit 701 on the array substrate 200 is located at the orthographic projection of the first filter 304 on the array substrate 200, and the orthographic projection of the first filter 304 on the array substrate 200 is located within the orthographic projection on the first sub-pixel P1. The first filter 304 can be configured to filter the first light transmitted through the reflection unit 701 into the first color light, so that the first sub-pixel P1 can emit the first color light on the basis of the light source 100 as the backlight. The orthographic projection of the second filter 305 on the array substrate 200 is located within the orthographic projection on the second sub-pixel P2, and the second filter 305 can be configured to filter the light of the light source 100 into the second color light, so that the second sub-pixel P2 can emit the second color light on the basis of the light source 100 as the backlight. The orthographic projection of the third color filter 306 on the array substrate 200 is located within the orthographic projection on the third sub-pixel P3, and the third color filter 306 can be configured to filter the light of the light source 100 into the third color light, so that the third sub-pixel P3 can emit the third color light on the basis of the light source 100 as the backlight. The orthographic projection of the fourth color filter 307 on the array substrate 200 is located within the orthographic projection on the fourth sub-pixel P4, and the fourth color filter 307 can be configured to filter the light of the light source 100 into the fourth color light, so that the fourth sub-pixel P4 can emit the fourth color light on the basis of the light source 100 as the backlight.

[0051] Figure 4 is a cross-sectional schematic diagram of a reflection unit of this exemplary embodiment. In some exemplary embodiments, as Figure 1 and Figure 4As shown, the reflection unit 701 may be a distributed Bragg reflector. A distributed Bragg reflector (DBR) is an optical device that selectively reflects a specific wavelength range by using the interference effect of a multilayer thin film. It is an artificial microstructure material that can be formed by alternately stacking two materials with different refractive indices. The reflection unit 701 may include a plurality of first reflection layers 704 and a plurality of second reflection layers 705 alternately stacked in a first direction. The material of the first reflection layer 704 is different from that of the second reflection layer 705. The thickness of at least two of the plurality of first reflection layers 704 is not equal. The thickness of at least two of the plurality of second reflection layers 705 is not equal. The thickness of the first reflection layer 704 may be the size of the first reflection layer 704 in the first direction. The thickness of the second reflection layer 705 may be the size of the second reflection layer 705 in the first direction. The reflective unit 701 has a periodically arranged structure, so that the photons are modulated during the transmission process. When the structural parameters are appropriate, a photon bandgap effect similar to the electronic band will appear between the photon energy bands. The distributed Bragg reflector can effectively regulate the transmission characteristics of light. By adjusting its structure, the light of a specific band can be prevented from propagating in the distributed Bragg reflector, and the blocked light is reflected toward the light source, and a part of the light of a specific band can be allowed to pass through, thereby achieving precise regulation and control of light propagation. In some exemplary embodiments, the light emitted by the light source 100 irradiates the side of the reflective unit 701 close to the light source 100, and the reflective unit 701 transmits the first light of a preset band in the light of the light source 100, and the preset band can be a wavelength of 510nm to 550nm, and the other part of the light is the second light, which is reflected back to the light source 100 by the reflective unit 701, and then reflected by the light source 100 toward the first substrate 600, and is reused, which can improve the utilization rate of the light source.

[0052] In some exemplary embodiments, Figure 1 and Figure 4As shown, the material of the first reflective layer 704 may be silicon dioxide (SiO2), and the material of the second reflective layer 705 may be niobium pentoxide (Nb2O5), and the extinction coefficient in the visible light band is zero, but it is not limited thereto, and the materials of the first reflective layer 704 and the second reflective layer 705 may be other different materials. The reflective unit 701 may have eleven layers of the first reflective layer 704 and twelve layers of the second reflective layer 704, but it is not limited thereto, for example, the number of the first reflective layer 704 and the second reflective layer 704 may be twenty-one and twenty-two, respectively; for another example, the number of the first reflective layer 704 and the second reflective layer 704 may be thirty-one and thirty-two, respectively; for another example, the number of the first reflective layer 704 and the second reflective layer 704 may be seven and eight, respectively. The alternately arranged multiple first reflective layers 704 and multiple second reflective layers 705 may include a first layer 706, a second layer 707, a third layer 708, a fourth layer 709, a fifth layer 710, a sixth layer 711, a seventh layer 712, an eighth layer 713, a ninth layer 714, a tenth layer 715, an eleventh layer 716, a twelfth layer 717, a thirteenth layer 718, a fourteenth layer 719, a fifteenth layer 720, a sixteenth layer 721, a seventeenth layer 722, an eighteenth layer 723, a nineteenth layer 724, a twentieth layer 725, a twenty-first layer 726, a twenty-second layer 727, and a twenty-third layer 728 arranged along a side away from the first substrate 600, and the first layer 706 may be located on the first substrate 600. The first layer 706, the third layer 708, the fifth layer 710, the seventh layer 712, the ninth layer 714, the eleventh layer 716, the thirteenth layer 718, the fifteenth layer 720, the seventeenth layer 722, the nineteenth layer 724, the twenty-first layer 726, and the twenty-third layer 728 can be the second reflective layer 705; the second layer 707, the fourth layer 709, the sixth layer 711, the eighth layer 713, the tenth layer 715, the twelfth layer 717, the fourteenth layer 719, the sixteenth layer 721, the eighteenth layer 723, the twentieth layer 725, and the twenty-second layer 727 can be the first reflective layer 705.The thickness of each layer may be the thickness of each layer in the first direction, the thickness of the first layer 706 may be 28nm; the thickness of the second layer 707 may be 114nm; the thickness of the third layer 708 may be 53nm; the thickness of the fourth layer 709 may be 103nm; the thickness of the fifth layer 710 may be 15nm; the thickness of the sixth layer 711 may be 46nm; the thickness of the seventh layer 712 may be 56nm; the thickness of the eighth layer 713 may be 96nm; the thickness of the ninth layer 714 may be 55nm; the thickness of the tenth layer 715 may be 95nm; the thickness of the eleventh layer 716 may be 52nm; the thickness of the tenth layer 717 may be 50nm; the thickness of the tenth layer 718 may be 50nm; the thickness of the tenth layer 719 may be 50nm; the thickness of the tenth layer 711 may be 50nm; the thickness of the tenth layer 712 may be 50nm; the thickness of the tenth layer 713 may be 50nm; the thickness of the tenth layer 714 may be 50nm; the thickness of the tenth layer 715 may be 50nm; the thickness of the tenth layer 716 may be 50nm; the thickness of the tenth layer 717 may be 50nm; the thickness of the tenth layer 718 may be 50nm; the thickness of the tenth layer 719 may be 50nm; the thickness of the tenth layer 71 The thickness of the second layer 717 may be 93nm; the thickness of the thirteenth layer 718 may be 55nm; the thickness of the fourteenth layer 719 may be 21nm; the thickness of the fifteenth layer 720 may be 35nm; the thickness of the sixteenth layer 721 may be 99nm; the thickness of the seventeenth layer 722 may be 54nm; the thickness of the eighteenth layer 723 may be 98nm; the thickness of the nineteenth layer 724 may be 54nm; the thickness of the twentieth layer 725 may be 99nm; the thickness of the twenty-first layer 726 may be 34nm; the thickness of the twenty-second layer 727 may be 202nm; and the thickness of the twenty-third layer 728 may be 55nm.

[0053] In some exemplary embodiments, Figure 1 and Figure 4 As shown, the setting of the reflective unit 701 and the etching make the color point of the first sub-pixel (P1) closer to the color point under the BT2020 standard, so that the color gamut of the device is greatly improved. The BT2020 standard is a color gamut standard formulated by the International Telecommunication Union (ITU) for ultra-high-definition television (UHDTV), which is designed to support a wider color range and higher image quality, and is suitable for 4K and 8K display devices. In some exemplary embodiments, the first color light emitted by the first sub-pixel (P1) is green light, and under the BT2020 standard, the color gamut range of the first color light is greater than or equal to 89%. Thus, in a pixel unit, both the first sub-pixel P1 and the second sub-pixel P2 emit green light, but the second sub-pixel P2 is filtered by the reflective unit 701. When a high-saturation picture is not displayed, the second sub-pixel P2 can provide green light and sufficient brightness for the picture to meet the power consumption and battery life requirements of portable wearable devices.

[0054] Figure 5 for Figure 4 Schematic diagram of the spectrum of the reflection unit in air, Figure 5 The horizontal axis is the wavelength (in nanometers), Figure 5 The ordinate in the figure is the light transmittance (in %). In some exemplary embodiments, Figure 1 , Figure 4 and Figure 5As shown, the average transmittance of the reflective unit 701 for light with a wavelength of 510nm to 550nm can be 95%, which is higher than the transmittance of conventional glass (i.e., 92%). Therefore, in addition to the function of correcting the spectrum, the reflective unit 701 has a higher transmittance relative to other structures of the display panel, thereby increasing the transmittance.

[0055] In some exemplary embodiments, Figure 1 and Figure 4 As shown, the display panel further includes a flat layer 702, which may be located on a side of the first substrate 600 close to the array substrate 200, and the flat layer 702 may be arranged in the same layer as the reflective unit 701. The flat layer 702 may be provided with a plurality of first through holes 703 arranged at intervals in a direction parallel to the array substrate 200, and the plurality of reflective units 701 correspond to the plurality of first through holes 703 one by one, and the reflective unit 701 is arranged in the first through hole 703. An end of the reflective unit 701 away from the light source 100 may be flush with an end of the flat layer 702 away from the light source 100, and the flat layer 702 may be formed by SOG (Spin-On Glass) filling technology, and the array substrate 200 covers the end surfaces of the reflective unit 701 and the flat layer 702 away from the light source 100, and the flushing of the reflective unit 701 and the flat layer 702 ensures that the array substrate 200 is on a flat plane.

[0056] Figure 6 for Figure 1 In the partially enlarged schematic diagram at A in the middle, in some exemplary embodiments, as Figure 1 and Figure 6As shown, the array substrate 200 may include a buffer layer 201, a semiconductor layer 202, a gate insulating layer 203, a first conductive layer 204, a first interlayer dielectric layer 205, a second conductive layer 206, a second interlayer dielectric layer 207 and a first insulating layer 208 which are sequentially stacked in a direction away from the flat layer 702. The semiconductor layer 202 may be a semiconductor material, including a channel region 209 of a transistor 212 located in the array substrate 200. The materials of the first conductive layer 204 and the second conductive layer 206 are both metal conductive materials, the first conductive layer 204 may include a gate electrode 210 of the transistor 212 located in the array substrate 200, and the second conductive layer 206 may include a first electrode 211 of the transistor 212 located in the array substrate 200. The buffer layer 201, the gate insulating layer 203, the first interlayer dielectric layer 205, the second interlayer dielectric layer 207 and the first insulating layer may all be insulating materials, the gate insulating layer 203 may separate the first conductive layer 204 and the semiconductor layer 204, the first interlayer dielectric layer 205 may separate the first conductive layer 204 and the second conductive layer 206. The buffer layer 201 covers the end surface of the planar layer 702 and the reflective unit 701 away from the first substrate 600, the buffer layer 201 may separate the semiconductor layer 204 and the planar layer 702, and separate the semiconductor layer 204 and the reflective unit 701, and the buffer layer 201 blocks the sodium and potassium ions from entering the semiconductor layer 204.

[0057] In some exemplary embodiments, Figure 2As shown, the first sub-pixel P1 may be a green sub-pixel (G1) emitting green light, the second sub-pixel P2 may be a yellow sub-pixel (Y) emitting yellow light, the third sub-pixel P3 may be a red sub-pixel (R) emitting red light, the fourth sub-pixel P4 may be a blue sub-pixel (B) emitting blue light, the first color light is green light, the second color light may be yellow light, the third color light may be red light, and the fourth color light may be blue light. In some exemplary embodiments, the first sub-pixel P1, the second sub-pixel P2, the third sub-pixel P3, and the fourth sub-pixel P4 may be arranged along a straight line. The second filter 305 of the color film substrate 300 may be configured to filter the light of the light source 100 into a second color light, so that the second sub-pixel P2 may emit the second color light on the basis of the light source 100 as a backlight. The second filter 305 that can filter yellow light has a simpler composition than the first filter 304 that can filter green light, and can obtain a higher transmittance. The transmittance of the second filter 305 that can filter yellow light can be greater than the transmittance of other filters. For example, the transmittance of the second filter 305 is greater than the transmittance of the third filter, so that the second sub-pixel P2 provides more brightness relative to the third sub-pixel P3. Therefore, the pixel unit of the display panel of this example, relative to the related art, the light emitted by the first sub-pixel P1 has a color gamut greater than or equal to 89% under the BT2020 standard; and the addition of the second sub-pixel P2 can improve the brightness of the display panel, while ensuring the color gamut level, it also contributes sufficient brightness, reducing power consumption for the display device.

[0058] Figure 7 is another schematic diagram of a display panel according to this exemplary embodiment, Figure 8 for Figure 7 In the partially enlarged schematic diagram of C in FIG. 1 , in some exemplary embodiments, as shown in FIG. Figure 7 and Figure 8 As shown, the display panel further includes a polarizing layer 800 and a plurality of grating structures 900. The polarizing layer 800 is disposed on the first substrate 600 and is located on a side of the first substrate 600 close to the light source 100. The polarizing layer 800 can polarize the light source 100. The polarizing layer 800 is provided with a plurality of second through holes 801 arranged at intervals in a direction parallel to the array substrate 200. The second through holes 801 penetrate the polarizing layer 800 in the first direction. The orthographic projection of the second through hole 801 on the array substrate 200 overlaps with the orthographic projection of the first through hole 703 on the array substrate 200, so that the light from the light source 100 can pass through the second through hole 801 to reach the reflecting unit 701. The polarizing layer 800 can be prepared on the first substrate 600 by a spin coating process, and then a development and exposure process is performed to form the second through hole 801.

[0059] In some exemplary embodiments, Figure 7 and Figure 8 As shown, the plurality of grating structures 900 correspond to the plurality of first through holes 703 one by one, the grating structure 900 is arranged on the first substrate 600 and is located in the first through hole 703, and the reflecting unit 701 covers the end surface of the grating structure 900 away from the first substrate 600. The orthographic projections of the plurality of grating structures 900 on the array substrate 200 do not overlap with the orthographic projections of the polarizing layer 800 on the array substrate 200, and the orthographic projections of the plurality of grating structures 900 on the array substrate 200 are located within the orthographic projections of the plurality of second through holes 801 on the array substrate 200. The grating structure 900 may include a plurality of metal wire grids 901, the metal wire grids 901 extend along the third direction, and the plurality of metal wire grids 901 are arranged at equal intervals in the second direction. The material of the metal wire grid 901 may be aluminum, but is not limited thereto, and may be other metal materials, for example. The width (L1) of the metal wire grid 901 may be the size of the metal wire grid 901 in the second direction, and the width of the metal wire grid 901 may be 50nm; the spacing (L2) between adjacent metal wire grids 901 may be the size of adjacent metal wire grids 901 in the second direction, and the spacing (L2) between adjacent metal wire grids 901 may be 120nm; the height (L3) of the metal wire grid 901 may be the size of the metal wire grid 901 in the first direction, and the height (L3) of the metal wire grid 901 may be 170nm. The grating structure 900 is configured to have a polarization degree greater than 0.9 for light in the first wavelength band, and the transmittance of the grating structure 900 for light in the first wavelength band is not less than 44.5%, and the first wavelength band is configured to be 510nm to 550nm. Therefore, the structure integrating the grating structure 900 and the reflection unit 701 has both filtering function and polarization modulation function, which can improve the light loss in the process of linear polarization conversion. A part of the light reflected by the grating structure 900 will also be depolarized and pass through the display panel again, thereby improving the brightness of the device or reducing power consumption.

[0060] Fig. 9 FIG. 1 is another schematic diagram of a display panel of the exemplary embodiment. In some exemplary embodiments, as shown in FIG. Fig. 9 As shown, the reflective layer 700 only includes a plurality of reflective units 701, and the plurality of reflective units 701 are arranged at intervals in a direction parallel to the array substrate 200, and the plurality of reflective units 701 are arranged on the first substrate 600 and are located on the end surface of the first substrate 600 close to the light source 100. The array substrate 200 can be arranged on the end surface of the first substrate 600 away from the light source 100. Therefore, the display panel of this example can omit the flat layer and reduce the cost without affecting the subsequent production process.

[0061] Fig.10 is another schematic diagram of a display panel according to this exemplary embodiment, Fig.11 for Fig.10 The local enlarged schematic diagram of D in the figure, Fig.12 for Fig.10Schematic diagram of display panel preparation in some exemplary embodiments, such as Figures 10 to 12 As shown, the display panel may include a flat layer 702 located between the array substrate 200 and the light source 100, and the first substrate 600, the reflective layer 700 and the flat layer 702 may be stacked in sequence in a direction away from the light source 100, and the flat layer 702 may cover the end face of the reflective unit 701 away from the light source 100.

[0062] In some exemplary embodiments, Figures 10 to 12 As shown, the first substrate 600 is provided with a plurality of first grooves 601 on the end surface away from the light source 100, and the plurality of first grooves 601 are arranged at intervals in a direction parallel to the array substrate 200, and the plurality of reflection units 701 correspond to the plurality of first grooves 601 one by one, and the end of the reflection unit 701 close to the light source 100 is arranged in the first groove 601, and the end of the reflection unit 701 away from the light source 100 extends out of the first groove 601. The flat layer 702 covers the reflection unit 701, and the end surface of the flat layer 702 away from the light source 100 is parallel to the array substrate 200.

[0063] In some exemplary embodiments, Figures 10 to 12 As shown, in the process of preparing the above display panel, a hole may be pre-engraved on the first substrate 600 to form a first groove 601. Subsequently, a reflective film structure is prepared on the first substrate 600, and the reflective film structure covers the end surface of the first substrate 600 having the first groove 601. Next, the reflective film structure is etched to form a first pattern, and the first pattern may include a reflective unit 701. Subsequently, a flat layer 702 covering the reflective unit 701 is formed. Therefore, the preparation process can reduce the pressure of the subsequent flattening process through the process of digging holes and then filling them, so that the array substrate 200 has a higher flatness.

[0064] In some exemplary embodiments, a display device includes the above-mentioned display panel. The display device provided in the embodiments of the present disclosure can be applied to electronic devices, which can be mobile phones, tablet computers, televisions, monitors, laptop computers, digital photo frames, navigators, car displays, wearable devices, and any products or components with display functions, such as smart watches, smart bracelets, smart glasses, smart headphones, smart clothing, head-mounted displays, etc.

[0065] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0066] In addition, the terms "first", "second", etc. 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", "second", etc. may explicitly or implicitly include at least one of the features.

[0067] In the description of the present application, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0068] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0071] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A display panel, characterized in that: The display panel includes a plurality of pixel units arranged in an array, each of the pixel units includes at least four sub-pixels, the at least four sub-pixels include a first sub-pixel, and the first sub-pixel is configured to emit a first color light; the display panel includes a light source, a reflective layer, an array substrate, and a color film substrate arranged in sequence in a first direction, and the first direction is perpendicular to the array substrate; The reflective layer comprises a plurality of reflective units, the plurality of reflective units are arranged at intervals in a direction parallel to the array substrate, and the orthographic projections of the reflective units on the array substrate overlap with the orthographic projections of the first sub-pixel on the array substrate; The reflection unit is configured to transmit a first light, where the first light is a light of a preset wavelength band emitted by the light source, and the color film substrate is configured to filter the first light into the first color light.

2. The display panel according to claim 1, characterized in that: The reflection unit is configured as a distributed Bragg reflector.

3. The display panel according to claim 1, characterized in that: The at least four sub-pixels further include a second sub-pixel, a third sub-pixel and a fourth sub-pixel, wherein the second sub-pixel is configured to emit a second color light, the third sub-pixel is configured to emit a third color light, and the fourth sub-pixel is configured to emit a fourth color light; The first color light is set to green light, and one of the second color light, the third color light, and the fourth color light is set to green light or yellow light.

4. The display panel according to claim 1, characterized in that: The first color light is green light. Under the BT2020 standard, the color gamut range of the first color light is greater than or equal to 89%.

5. The display panel according to claim 2, characterized in that: The display panel further comprises a first substrate and a flat layer, wherein the first substrate is located between the array substrate and the light source, and the flat layer is located on a side of the first substrate close to the array substrate; The planar layer is provided with a plurality of first through holes arranged at intervals in a direction parallel to the array substrate, the plurality of reflection units correspond to the plurality of first through holes one by one, and the reflection units are arranged in the first through holes.

6. The display panel according to claim 2, characterized in that: The display panel further includes a first substrate and a flat layer located between the array substrate and the light source, wherein the first substrate, the reflective layer and the flat layer are sequentially stacked in a direction away from the light source; The first substrate is provided with a plurality of first grooves on the end face away from the light source, and the plurality of first grooves are arranged at intervals in a direction parallel to the array substrate. The plurality of reflection units correspond to the plurality of first grooves one by one, and one end of the reflection unit close to the light source is arranged in the first groove, and the flat layer covers the end face of the reflection unit away from the light source.

7. The display panel according to claim 5 or 6, characterized in that: The array substrate comprises a buffer layer and a semiconductor layer which are sequentially stacked in a direction away from the planar layer, and the buffer layer covers an end surface of the planar layer away from the first substrate.

8. The display panel according to claim 5, characterized in that: The display panel further comprises a polarizing layer and a plurality of grating structures, wherein the polarizing layer is located on a side of the first substrate close to the light source; The plurality of grating structures correspond to the plurality of first through holes in a one-to-one manner, the grating structures are arranged on the first substrate and located in the first through holes, and the reflection unit covers the end surface of the grating structure away from the first substrate; The orthographic projections of the multiple grating structures on the array substrate do not overlap with the orthographic projection of the polarizing layer on the array substrate.

9. The display panel according to claim 8, characterized in that: The polarizing layer is provided with a plurality of second through holes arranged at intervals in a direction parallel to the array substrate, and the orthographic projections of the plurality of grating structures on the array substrate are located within the orthographic projections of the plurality of second through holes on the array substrate.

10. The display panel according to claim 8, characterized in that: The grating structure is configured to have a polarization degree greater than 0.9 for light in a first waveband, and a transmittance of the grating structure to light in the first waveband is not less than 44.5%, and the first waveband is configured to be 510nm to 550nm.

11. The display panel according to claim 2, characterized in that: The display panel further includes a first substrate, wherein the first substrate is located between the reflective layer and the array substrate, and the plurality of reflective units are arranged on an end surface of the first substrate away from the array substrate.

12. The display panel according to claim 2, characterized in that: The reflecting unit includes a plurality of first reflecting layers and a plurality of second reflecting layers alternately stacked in the first direction, and the materials of the first reflecting layers are different from the materials of the second reflecting layers; The thickness of the first reflective layer is set to the size of the first reflective layer in the first direction, and the thickness of the second reflective layer is set to the size of the second reflective layer in the first direction; At least two of the plurality of first reflective layers have unequal thicknesses, and at least two of the plurality of second reflective layers have unequal thicknesses.

13. The display panel according to claim 12, characterized in that: The material of the first reflective layer includes silicon dioxide, and the material of the second reflective layer includes niobium pentoxide.

14. The display panel according to claim 1, characterized in that: The color filter substrate includes a plurality of filters spaced apart in a direction parallel to the array substrate, the plurality of filters include a plurality of first filters, and the first filters are configured to filter the first light into the first color light; The orthographic projection of the reflection unit on the array substrate is located within the orthographic projection of the first filter on the array substrate.

15. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 14.

Images