Display panel and display device

Abstract

The present application discloses a display panel and a display device, wherein the display panel includes a substrate, a pixel definition layer, a plurality of light-emitting units, a compensation light source, an encapsulation layer and a light-shielding layer, wherein the plurality of light-emitting units are arranged on the substrate, the compensation light source is arranged on the pixel definition layer, the encapsulation layer covers the light-emitting unit, and is used to seal the light-emitting unit, the light-shielding layer is arranged on the compensation light source, and is located in the non-opening area, and is used to shield the outgoing light of the compensation light source perpendicular to the substrate; wherein the compensation light source is used to provide the light-emitting unit with a preset angle of compensation outgoing light when the adjacent light-emitting unit emits light, and the intensity of the compensation outgoing light varies with the luminous intensity of the adjacent light-emitting unit. The present application uses the compensation light source to adjust the wide and narrow viewing angles of the display panel, and improves the wide viewing angle display effect of the display panel without affecting the display.

Description

Technical Field

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

[0002] OLED, as a self-luminous display technology, is increasingly used in products. As people in modern society pay more attention to their privacy, the variable viewing angle function of display devices (also known as anti-peeping) has become an essential function of products. Therefore, OLED variable viewing angle technology has also been a hot topic of discussion recently.

[0003] Traditional anti-peeping display is to attach an anti-peeping film on the surface of the display panel. The anti-peeping film generally uses ultra-fine blinds technology, and the principle is similar to that of vertical blinds. The display with the function of limiting the light to exit the display panel from a fixed angle is the simplest and most direct solution, with a higher yield and the most extensive application. However, the anti-peeping angle and degree of anti-peeping of general anti-peeping films are limited and cannot be adjusted variably. The viewing angle change of general OLED products is mainly achieved by adjusting the area of ​​the pixel opening area, and the adjustment method is fixed, which often leads to the problem of low brightness. Summary of the invention

[0004] The purpose of the present application is to provide a display panel and a display device, which can adjust the wide and narrow viewing angles of the display panel by utilizing a compensating light source, thereby improving the wide viewing angle display effect of the display panel without affecting the display.

[0005] The present application discloses a display panel, which includes a substrate, a pixel definition layer, a plurality of light-emitting units, a compensation light source, an encapsulation layer and a shading layer, wherein the pixel definition layer is arranged on the substrate to form a plurality of opening areas, a plurality of the light-emitting units are arranged on the substrate and located in the opening areas, the compensation light source is arranged on the pixel definition layer and located in the non-opening areas, the encapsulation layer covers the light-emitting units and is used to seal the light-emitting units, the shading layer is arranged on the compensation light source and is located in the non-opening areas and is used to block the outgoing light of the compensation light source perpendicular to the substrate; wherein the compensation light source is used to provide the compensation outgoing light of a preset angle to the light-emitting unit when the adjacent light-emitting unit emits light for display, and the intensity of the compensation outgoing light varies with the light-emitting intensity of the adjacent light-emitting unit.

[0006] Optionally, the compensation light source includes a non-visible light excitation layer and a light compensation layer; the light compensation layer is formed of a metal organic framework material, and the metal organic framework material includes a lanthanide metal organic framework material; the light compensation layer is used to generate visible light under non-visible light excitation, and the visible light includes one of blue light, green light or red light; the non-visible light excitation layer is used to emit non-visible light under voltage drive.

[0007] Optionally, the light compensation layer includes at least a first light compensation part and a second light compensation part, the non-visible light excitation layer includes at least a first excitation layer and a second excitation layer, the first light compensation part is used to emit a first compensation output light under the control of the first excitation layer, and the second light compensation part is used to emit a second compensation output light under the control of the second excitation layer, and the non-visible light wavelength ranges of the first excitation layer and the second excitation layer are different; wherein the intensity of the first compensation output light is less than the intensity of the second compensation output light; when the luminous intensity of the light-emitting unit is in the first range, the first light compensation part works, and when the luminous intensity of the light-emitting unit is in the second range, the second light compensation part works.

[0008] Optionally, a groove is provided on the pixel definition layer, and the first light compensation part and the second light compensation part are respectively provided in the groove.

[0009] Optionally, the first light compensation portion is disposed on the second light compensation portion, and an area of ​​the first light compensation portion is smaller than that of the second light compensation portion; the first excitation layer is disposed on the second excitation layer; and the non-visible light emitted by the second excitation layer can pass through the first excitation layer and enter the second light compensation portion.

[0010] Optionally, the second light compensation portion is arranged around the first light compensation portion, and the first light compensation portion and the second light compensation portion are arranged in the same layer.

[0011] Optionally, the display panel includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, the light-emitting unit includes a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit, the red light-emitting unit is arranged corresponding to the red sub-pixel, the green light-emitting unit is arranged corresponding to the green sub-pixel, and the blue light-emitting unit is arranged corresponding to the blue sub-pixel; the light compensation layer includes a red light compensation layer, a green light compensation layer and a blue light compensation layer, the red light compensation layer is arranged on one side or multiple sides of the red light-emitting unit, the green light compensation layer is arranged on one side or multiple sides of the green light-emitting unit, and the blue light compensation layer is arranged on one side or multiple sides of the blue light-emitting unit; only a light compensation layer of one color is arranged between two adjacent light-emitting units of different colors.

[0012] Optionally, the light compensation layer includes multiple groups of light compensation parts, the non-visible light excitation layer includes multiple groups of excitation layers that emit non-visible light of different wavelengths, the number of the light compensation parts is the same as the number of the excitation layers, and a group of the light compensation parts is used to emit compensated output light under the control of a group of the excitation layers.

[0013] Optionally, the display panel controls the number of the excitation layers working to control the intensity of the compensated emitted light emitted by the light compensation unit; when the light intensity of the light-emitting unit is greater, the number of the excitation layers working is greater.

[0014] The present application also discloses a display device, comprising a driving circuit and the above-mentioned display panel, wherein the driving circuit is used to drive the display panel to display.

[0015] The present application sets a compensation light source, which emits light from the non-opening area, and the emitted light perpendicular to the direction of the substrate is blocked by the shading layer, so that the light emitted by the compensation light source is emitted obliquely from the opening area, thereby forming a compensation emitted light with a certain angle. Moreover, the compensation emitted light emitted by the compensation light source of the present application can be adjusted according to the intensity emitted by the adjacent light-emitting units, so that it can be clearly displayed under different display screens, and the color mixing of the screen caused by the inability to adjust the intensity of the compensated emitted light will not cause the situation that it cannot be seen clearly under a wide viewing angle. When the display panel needs to display at a wide viewing angle, the light emission under a wide viewing angle is compensated by controlling the compensation light source, and then the adjustment of the wide and narrow viewing angle of the display panel is achieved by using the compensation light source. It allows people to see the content displayed on the screen clearly even at a wide viewing angle, thereby improving the display quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 is a schematic diagram of a display panel according to a first embodiment of the present application;

[0018] Figure 2 is a schematic diagram of a display panel according to a second embodiment of the present application;

[0019] Figure 3 is a schematic diagram of a display panel according to a third embodiment of the present application;

[0020] Figure 4 is a driving schematic diagram of the non-visible light excitation layer of the present application;

[0021] Figure 5 is a schematic diagram of a display panel according to a fourth embodiment of the present application;

[0022] Figure 6 is a schematic top view of a display panel of the present application;

[0023] Figure 7 is a schematic diagram of a display device of the present application.

[0024] Among them, 100, display panel; 101, opening area; 102, non-opening area; 110, base substrate; 111, pixel definition layer; 112, groove; 113, encapsulation layer; 120, light-emitting unit; 120R, red light-emitting unit; 120G, green light-emitting unit; 120B, blue light-emitting unit; 130, compensation light source; 140, light compensation layer; 140R, red light compensation layer; 140G, green light compensation layer; 140B, blue light compensation layer; 141, first light compensation part; 142, second light compensation part; 150, non-visible light excitation layer; 151, first excitation layer; 152, second excitation layer; 160, light shielding layer; 170, color filter layer; R, red sub-pixel; G, green sub-pixel; B, blue sub-pixel; 200, display device; 210, driving circuit. DETAILED DESCRIPTION

[0025] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0026] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "multiple" means two or more. In addition, the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. indicating orientation or positional relationships are described based on the orientation or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the simplified description of the present application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0027] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0028] Figure 1 is a schematic diagram of a display panel of the first embodiment of the present application, see Figure 1As shown, the present application discloses a display panel, the display panel 100 includes a base substrate 110, a pixel definition layer 111, a plurality of light emitting units 120, a compensation light source 130, an encapsulation layer 113 and a light shielding layer 160, the pixel definition layer 111 is arranged on the base substrate 110, and a plurality of opening areas 101 are formed, a plurality of the light emitting units 120 are arranged on the base substrate 110, and are located in the opening areas 101, the compensation light source 130 is arranged on the pixel definition layer 111, and is located in the non-opening area 102, the encapsulation layer 113 and the light shielding layer 160 The covering layer 113 is arranged to cover the light-emitting unit 120 and is used to seal the light-emitting unit 120. The shading layer 160 is arranged on the compensation light source 130 and is located in the non-opening area 102, and is used to block the outgoing light of the compensation light source 130 perpendicular to the base substrate 110; wherein, the compensation light source 130 is used to provide the light-emitting unit 120 with a compensation outgoing light of a preset angle when the adjacent light-emitting unit 120 emits light, and the intensity of the compensation outgoing light varies with the light intensity of the adjacent light-emitting unit 120.

[0029] The present application sets a compensation light source 130, which emits light from the non-opening area 102, and the emitted light perpendicular to the direction of the substrate 110 is blocked by the light shielding layer 160, so that the light emitted by the compensation light source 130 is emitted obliquely from the opening area 101, thereby forming a compensation emitted light with a certain angle. Moreover, the compensation emitted light emitted by the compensation light source 130 of the present application can be adjusted according to the intensity emitted by the adjacent light-emitting unit 120, so that it can be clearly displayed under different display screens, and the color mixing of the screen caused by the inability to adjust the intensity of the emitted light will not cause the situation that it cannot be seen clearly under a wide viewing angle. When the display panel 100 needs to display at a wide viewing angle, the light emission under a wide viewing angle is compensated by controlling the compensation light source 130, and then the wide and narrow viewing angles of the display panel 100 are adjusted by using the compensation light source 130. It allows people to see the content displayed on the screen clearly under a wide viewing angle, thereby improving the display quality.

[0030] It is worth mentioning that when the angle between the viewing direction of the human eye and the display screen of the display panel 100 is less than or equal to 60 degrees, the brightness of the emitted light of the pixels of the display panel 100 at the side viewing angle is insufficient, resulting in inaccurate display pixels for the user at the side viewing angle. Therefore, it is necessary to compensate for the emitted light at the side viewing angle. Moreover, under different display grayscales, that is, when the light intensities emitted by the different color light-emitting units 120 of the display panel 100 are different, compensation emitted light of different brightness is required to compensate for the side viewing angle display. Therefore, the preset angle of the compensation emitted light of the preset angle mainly provided in this embodiment is mainly the compensation emitted light at a large viewing angle, which can generally be between 12 degrees and 60 degrees, and the side viewing angle display within this range can be compensated.

[0031] Specifically, the compensation light source 130 in this embodiment mainly utilizes the metal organic framework material that can emit visible light under the excitation of non-visible light, thereby expanding the display viewing angle. The advantage of the metal organic framework material of the present application is that it does not need to provide voltage for driving inside the display panel 100, but requires the excitation of non-visible light to emit light, that is, the compensation light source 130 is set in the non-opening area 102, for example, it is easy to implement on the pixel definition layer 111 or other positions, and the compensation light source 130 can be set in a small space. Compared with the solution of synchronously setting the compensation light source 130 in the non-opening area 102 using the light-emitting unit 120 in the exemplary technology, it does not need to occupy too much area, and it is not necessary to improve the non-opening position in the pixel. However, due to the device occupation area problem of the light-emitting unit 120, when the light-emitting unit 120 is used in the non-opening area 102, it is necessary to squeeze the position of the opening, so that when the original three sub-pixels form one pixel, at this time, in one pixel, the compensation sub-pixel will also occupy an area, so that four sub-pixels need to be set, resulting in a reduction in the opening area, causing display problems.

[0032] Specifically, the compensation light source 130 includes a non-visible light excitation layer 150 and a light compensation layer 140; the light compensation layer 140 is formed of a metal organic framework material, and the metal organic framework material includes a lanthanide metal organic framework material; the light compensation layer 140 is used to generate visible light under non-visible light excitation, and the visible light includes one of blue light, green light or red light; the non-visible light excitation layer 150 is used to emit non-visible light under voltage drive.

[0033] Specifically, the metal organic framework material is a porous material formed by self-assembly of metal ions and organic ligands. Both metal ions and organic ligands can serve as potential luminescent centers, and the pores of MOFs can also load luminescent objects. The metal organic framework material in this embodiment can emit monochromatic or polychromatic light. Under the excitation of invisible light, the colors of the light emitted by adding different organic ligands or metal ions are also different. For example, lanthanide metal ions (such as Ln3+, Eu3+, Tb3+ and Dy3+) and organic ligands with non-uniformly distributed carboxyl groups (such as isophthalic acid derivatives) are first assembled into a ribbon structure through the anisotropic growth of metal ions and organic ligands, and then these nanobelts are entangled and gelled to form MOF gel. By adjusting the type and / or ratio of Ln3+ ions, a mixed metal MOF gel with full-color emission can be prepared. The coordination center lanthanide metal ions (Eu3+, Tb3+ or Dy3+) can produce different colors of emission, thereby achieving multi-color control under the same wavelength excitation. At the same time, by changing the type and proportion of ions, emission of the same color at different wavelengths can be achieved.

[0034] The metal organic framework material in this embodiment is mainly a lanthanide metal organic framework material, which has the characteristic of luminescence under non-visible light excitation, and has multiple forms of luminescence, such as simultaneous luminescence of ligands and metal ions, simultaneous luminescence of host and guest, simultaneous luminescence of mixed metals, and simultaneous luminescence of mixed MOFs. Taking the simultaneous luminescence of ligands and metal ions as an example, the lanthanide metal ions in the lanthanide organic framework material have an antenna effect, that is, the ligand absorbs energy to the excited state, passes through the gap to the triplet state, and the triplet state sensitizes the lanthanide ions to achieve antenna effect luminescence. Among them, to achieve simultaneous luminescence of ligands and metal ions, the energy transfer efficiency of ligands to europium ions can be regulated by introducing boric acid groups on terephthalic acid, and the ligands and metal ions are used to emit light simultaneously. The boric acid group has a strong affinity for fluoride ions and H2O2, and the ratio-type luminescence sensing and visual detection of fluoride ions and H2O2 are achieved. Different from regulating energy transfer, the aggregation-induced emission ligands and lanthanide ions are used to prepare MOFs, and the luminescence is enhanced by limiting the intramolecular rotation of the ligands by coordination, and the luminescence is combined with the antenna effect of the europium ions to achieve simultaneous enhancement of the luminescence of the ligands and europium ions. For example, by adjusting the ratio of lanthanide ions and ligands, taking Ln-MOF[TbxEu1-x (TCBA)(H2O)]2·DMF as an example, the characteristic of Eu (III) is to emit red light, the characteristic of Tb (III) is to emit green light, and the characteristic of Gd (III) is to emit blue light. The ratio of Eu (III) and Tb (III) and Gd (III) can be adjusted to change the luminescence color, that is, different colors of luminescent MOFs can be achieved by combining different ligands and metal ions. The ligands used in host-guest simultaneous luminescence, mixed metal simultaneous luminescence and mixed MOFs are generally different from metal ions. For host-guest simultaneous luminescence, Ru@MIL-NH2 material is taken as an example. Ru(bpy) 32+ has red fluorescence and MIL-NH2 has blue fluorescence, which realizes blue-red host-guest luminescence under a single excitation of 300nm. Mixed metal simultaneous luminescence can be easily prepared by using Ln3+ ions with similar atomic radius and coordination mode, and by adjusting the ratio of Ln3+ ions. The red, green and blue luminescence of Eu3+, Tb3+ and Dy3+ are used. Mixed MOFs simultaneous luminescence uses Eu3+ and Tb3+ as metal nodes, and reacts with 2,5-dicarboxylic acid phenylboronic acid to prepare red light Eu-MOFs and green light Tb-MOFs respectively, and prepares three primary colors MOFs ink together with blue light UiO-66-NH2.

[0035] In addition to the four luminescence paradigms mentioned above for realizing multi-luminescent lanthanide metal organic framework materials, mixed ligands as luminescence centers and single ligands with multi-luminescence can also be used to prepare multi-luminescent MOFs. Among them, by adjusting the ratio of Eu (III) and Tb (III), Gd (III), the ratio of Eu3+, Tb3+ and Dy3+, etc., the wavelength of invisible light can be selected between 250nm and 350nm, so that lanthanide metal organic framework materials of different materials have different luminescent colors. In this embodiment, the lanthanide metal organic framework material is mainly used to emit monochromatic light such as red, green or blue under different material ratios to achieve red light compensation, green light compensation and blue light compensation.

[0036] Figure 2 is a schematic diagram of a display panel of the second embodiment of the present application, see Figure 2 As shown, in this embodiment, the light compensation layer 140 includes at least a first light compensation part 141 and a second light compensation part 142, and the non-visible light excitation layer 150 includes at least a first excitation layer 151 and a second excitation layer 152, the first light compensation part 141 is used to emit a first compensated output light under the control of the first excitation layer 151, and the second light compensation part 142 is used to emit a second compensated output light under the control of the second excitation layer 152, and the first excitation layer 151 and the second excitation layer 152 have different non-visible light wavelength ranges.

[0037] In this embodiment, two light compensation parts are used as an example for explanation. In practice, it is not limited to two light compensation parts, and it needs to be designed according to the actual situation. In this solution, it is mainly considered that in high grayscale display and low grayscale display, especially when adjacent pixels are in high grayscale and low grayscale respectively, if the compensation light of two pixels is consistent, display problems such as low contrast will occur. Therefore, in this embodiment, it is necessary to distinguish the light compensation of the side viewing angle of high grayscale and low grayscale. For example, in high grayscale, the compensation light brightness is greater, and in low grayscale, the compensation brightness is smaller, so as to achieve a better compensation effect.

[0038] Specifically, in this embodiment, the wavelengths emitted by the first excitation layer 151 and the second excitation layer 152 are different, so that the first light compensation unit 141 and the second light compensation unit 142 can be controlled to work separately or simultaneously, so as to achieve at least two steps of light compensation brightness when the first light compensation unit 141, the second light compensation unit 142, and both work simultaneously. Of course, more steps of brightness compensation can also be achieved by continuing to increase the number of light compensation units.

[0039] In one embodiment, the brightness of the first light compensation part 141 and the second light compensation part 142 can be the same or different. When the brightness of the first light compensation part 141 and the second light compensation part 142 is the same, it is necessary to control the first light compensation part 141 and the second light compensation part 142 to be turned on simultaneously or individually to achieve different compensation brightness. When the brightness of the first light compensation part 141 and the second light compensation part 142 is set to be different, multi-step brightness compensation can be achieved by individually controlling the first light compensation part 141 or the second light compensation part 142 to be turned on or off.

[0040] Specifically, taking the case where the brightness settings of the first light compensation part 141 and the second light compensation part 142 are different, the intensity of the first compensation outgoing light is less than the intensity of the second compensation outgoing light. When the luminous intensity of the light emitting unit 120 is in the first range, the first compensation outgoing light works, and when the luminous intensity of the light emitting unit 120 is in the second range, the second compensation outgoing light works. For example, when the display panel 100 displays in 256 grayscales, the display pixels of 0 to 127 grayscales can be configured to work as the first compensation outgoing light, and the display pixels of 128 to 255 grayscales can be configured to work as the second compensation outgoing light, so that low grayscale display is compensated by the first light compensation part 141, and high grayscale display is compensated by the second light compensation part 142.

[0041] Generally speaking, the first light compensation part 141 and the second light compensation part 142 need to be controlled according to the grayscale displayed by the adjacent light emitting unit 120. Of course, they can also be controlled in different regions, or according to the overall value of the grayscale displayed. For example, when more than half of the pixels of the current display screen are displayed at a high grayscale, the second light compensation part 142 is controlled to work. When more than half of the pixels of the current display panel 100 are displayed at a low grayscale, the first light compensation part 141 is controlled to work. Although the above overall value control method is not so precise and accurate, it is more feasible and has a significant effect on improving the side viewing angle.

[0042] Continue to see Figure 2 As shown, in this embodiment, the first light compensation part 141 and the second light compensation part 142 are respectively arranged on the pixel definition layer 111. When the pixel definition layer 111 is provided with a groove 112, the first light compensation part 141 and the second light compensation part 142 are respectively arranged in the groove 112. Of course, when the pixel definition layer 111 is not provided with a groove 112, the first light compensation part 141 and the second light compensation part 142 are arranged between the pixel definition layer 111 and the encapsulation layer 113.

[0043] In this solution, by providing a groove 112 on the pixel definition layer 111, the first light compensation part 141 and the second light compensation part 142 are hidden in the groove 112, and the pixel definition layer 111 separates the light compensation part from the light emitting unit 120, thereby preventing the light compensation part from interfering with the light emitting unit 120. Since the light compensation part is formed of a lanthanide metal organic framework material, it can be formed in the groove 112 by coating or printing, thereby reducing the impact on other film layers.

[0044] In this embodiment, first light compensation portion 141 is disposed on second light compensation portion 142 , and first excitation layer 151 is disposed on second excitation layer 152 ; non-visible light emitted by second excitation layer 152 can pass through first excitation layer 151 and enter second light compensation portion 142 .

[0045] In actual design, since the area of ​​the non-opening region 102 is small and the width of the pixel definition layer 111 between adjacent light-emitting units 120 is small, the design area of ​​the first light compensation part 141 and the second light compensation part 142 is insufficient. Therefore, the first light compensation part 141 and the second light compensation part 142 can be simultaneously arranged in the groove 112 of the pixel definition layer 111 by stacking, and the first light compensation part 141 and the second light compensation part 142 can be controlled by adjusting the non-visible light of different wavelengths.

[0046] Specifically, the area of ​​the first light compensation part 141 is smaller than that of the second light compensation part 142. By setting the area of ​​the first light compensation part 141 to be different from that of the second light compensation part 142, the second light compensation part 142 and the first light compensation part 141 have different compensation light intensities, thereby achieving compensation of different lights.

[0047] Figure 3 is a schematic diagram of a display panel of the third embodiment of the present application, see Figure 3As shown, in another embodiment, the second light compensation part 142 is arranged around the first light compensation part 141, and the first light compensation part 141 and the second light compensation part 142 are arranged in the same layer. By reducing the area of ​​the first light compensation part 141 and the second light compensation part 142 on the pixel definition layer 111, the first light compensation part 141 and the second light compensation part 142 are arranged in the same layer, so that different brightness compensation is achieved by adjusting the first light compensation part 141 and the second light compensation part 142 respectively. In this embodiment, since the second light compensation part 142 and the first light compensation part 141 are arranged at different positions, the wide viewing angles of the two are also different. The second light compensation part 142 arranged on the outside is arranged at a position close to the opening area 101, and the output angle deviation is smaller than that of the first light compensation part 141, that is, the side viewing angle compensation angle of the first light compensation part 141 is larger, so that the user can also see the compensated output light from the first light compensation part 141 at a larger side viewing angle, and a larger angle of light compensation is achieved.

[0048] Further, from the cross section of two adjacent light emitting units 120, the width of the pixel definition layer 111 is equal to the spacing between the two adjacent light emitting units 120. The width of the groove 112 needs to be smaller than the width of the pixel definition layer 111, and part of the pixel definition layer 111 needs to be left to separate the light compensation layer 140 from the light emitting unit 120. When the first light compensation part 141 and the second light compensation part 142 are arranged in the same layer, the width of the first light compensation part 141 accounts for about one-half to one-third (including the end value) of the width of the groove 112, so that the width of the middle area accounts for about one-half to one-third of the width of the groove 112. Of course, if the number of light compensation layers 140 is larger, more gradients need to be designed. For example, the middle area is the first light compensation part 141, and the second light compensation part 142, ..., and the nth light compensation part can be included in sequence around the middle area to achieve multiple gradient surrounds. The nth light compensation part is the nth viewing angle gradient, and the area design of each gradient is not fixed, but is set according to the angle. Correspondingly, the non-visible light excitation layer 150 below is also provided with n, for example, the first excitation layer 151, the second excitation layer 152, ..., the nth excitation layer. The first excitation layer 151, the second excitation layer 152, ..., the nth excitation layer are stacked, and the non-visible light excitation layer 150 arranged on the upper layer is driven by the transparent conductive layer. It is worth mentioning that the switch of the light compensation layer 140 in this embodiment can realize the control of the variable viewing angle, and by setting a plurality of groups of light compensation parts, the gradual adjustment of different viewing angles is realized, thereby realizing the adjustment of the variable viewing angle in a limited space. For the display panel 100 in this embodiment, the area of ​​the opening area 101 can be appropriately reduced, thereby increasing the area of ​​the non-opening area 102, so that when the compensation light source 130 is not working, it is a narrow viewing angle display, and has a certain anti-peeping ability, and when the compensation light source 130 is working, it is a wide viewing angle display, so as to have a wider display effect. Of course, the adjustment of the wide and narrow viewing angle is also applicable when the first light compensation layer 140 and the second light compensation layer 140 are stacked as in the above embodiment.

[0049] Furthermore, the light compensation layer 140 includes multiple groups of light compensation parts, the non-visible light excitation layer 150 includes multiple groups of non-visible light excitation layers 150 having different emission wavelengths, the number of the light compensation parts is the same as the number of the excitation layers, and a group of the light compensation parts is used to emit compensated emission light under the control of a group of the excitation layers.

[0050] In this embodiment, the luminous intensity of each group of light compensation parts can be controlled to be the same or different. In the same case, the compensation brightness can be controlled by controlling the number of light compensation parts. In different cases, light compensation parts of different brightness can be controlled separately to achieve different compensation brightness. It can be understood that if multiple groups of light compensation parts are arranged in the same layer, it also means that a larger non-opening area 102 is required to accommodate this part. In this solution, considering the area of ​​the pixel definition layer 111, multiple groups of light compensation parts can be stacked to form multi-step brightness compensation.

[0051] Specifically, the display panel 100 controls the number of the excitation layers working to control the intensity of the compensated output light emitted by the light compensation unit; when the light intensity of the light emitting unit 120 is greater, the number of the excitation layers working is greater. In this embodiment, the intensity of the compensated output light with step changes is set according to the number of light compensation units to adapt to different grayscale changes. For example, when it is set to four steps, the grayscale stage is divided into four stages to match it, thereby forming a better light compensation.

[0052] Figure 4 This is a schematic diagram of the driving of the non-visible light excitation layer of the present application, see Figure 4 As shown, for driving of first excitation layer 151 and second excitation layer 152, it is necessary to keep displaying or turning off at the same time as corresponding light emitting unit 120. First excitation layer 151 and second excitation layer 152 need to be driven by two electrodes respectively, but considering that first excitation layer 151 and second excitation layer 152 are stacked, first excitation layer 151 and second excitation layer 152 can share one electrode, and then drive by controlling another electrode of first excitation layer 151 and second excitation layer 152, first excitation layer 151 is the first electrode, and second excitation layer 152 is the second electrode. The first excitation layer 151 is driven by a first active switch, and the second excitation layer 152 is driven by a second active switch. The gate of the first active switch is connected to the first control signal, the input end of the first active switch is connected to the anode (bottom electrode) of the corresponding light-emitting unit 120, the output end of the first active switch is connected to the first electrode, the gate of the second active switch is connected to the second control signal, the input end of the second active switch is connected to the anode of the above-mentioned light-emitting unit 120, and the output end of the second active switch is connected to the second electrode. Under the control of the first control signal and the second control signal, when the above-mentioned light-emitting unit 120 emits light, the first excitation layer 151 or the second excitation layer 152 can be controlled to work. The first control signal and the second control signal are mainly determined according to the grayscale of the display screen.

[0053] Figure 5 is a schematic diagram of a display panel according to a fourth embodiment of the present application, Figure 6is a top view schematic diagram of the display panel of the present application, see Figure 5 to Figure 6 As shown, specifically, the display panel 100 includes a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B, the light-emitting unit 120 includes a red light-emitting unit 120R, a green light-emitting unit 120G and a blue light-emitting unit 120B, the red light-emitting unit 120R is arranged corresponding to the red sub-pixel R, the green light-emitting unit 120G is arranged corresponding to the green sub-pixel G, and the blue light-emitting unit 120B is arranged corresponding to the blue sub-pixel B.

[0054] When the light compensation layer 140 of the present application emits monochromatic light, the light compensation layer 140 of the corresponding luminous color needs to be arranged at the sub-pixel position of the corresponding color. Specifically, the light compensation layer 140 includes a red light compensation layer 140R, a green light compensation layer 140G and a blue light compensation layer 140B, the red light compensation layer 140R is arranged on one or more sides of the red light emitting unit 120R, the green light compensation layer 140G is arranged on one or more sides of the green light emitting unit 120G, and the blue light compensation layer 140B is arranged on one or more sides of the blue light emitting unit 120B.

[0055] The red light compensation layer 140R mainly emits red light, the blue light compensation layer 140B mainly emits blue light, and the green light compensation layer 140G mainly emits green light. The red light compensation layer 140R, the green light compensation layer 140G, and the blue light compensation layer 140B emitting light of different colors can be formed by using lanthanide metal organic framework materials formed by different ligands or metal ions.

[0056] In one embodiment, the display panel 100 of this embodiment is a display panel 100 of a new technology that replaces a polarizing film with a COE (Color film on Encapsulation, forming a color filter on a thin film encapsulation structure), that is, a color filter layer 170 is further provided on the encapsulation layer 113, and the color filter layer 170 is provided with a color filter portion corresponding to the opening area 101. Generally speaking, the color filter portion includes a red filter portion, a green filter portion, and a blue filter portion. Three adjacent color filter portions of different colors can form a pixel, which are respectively called a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. By controlling the luminous intensity of the light emitting unit 120 at the corresponding position of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B, the amount of light passing through the red filter portion, the green filter portion, and the blue filter portion is changed, so as to realize the color display in the pixel. Any color can be formed in a pixel, that is, by controlling the gray scale of the red sub-pixel R, the gray scale of the green sub-pixel G, and the gray scale of the blue sub-pixel B, the display of different colors can be realized. Moreover, in this embodiment, the light shielding layer 160 mentioned above can be formed in the same layer as the color filter portion, and the black matrix in the color filter layer 170 is used as the light shielding layer 160 .

[0057] In another embodiment, the display panel 100 of this embodiment can also be a display panel 100 with a polarizer, that is, a polarizer (polarizer) is arranged on the upper part of the display panel 100. The polarizer is mainly used to reduce the reflection problem of the external ambient light, and there is no need to set the color filter layer 170. However, since the function of the polarizer is mainly polarization, and does not filter the wavelength of the light. Therefore, a monochromatic light compensation part is arranged between the light-emitting units 120 of different colors, and when the outgoing light of the monochromatic light compensation part is emitted from the opening area 101 corresponding to the light-emitting units 120 of different colors, there will be a problem of color mixing. For example, the red light compensation layer 140R arranged between the red sub-pixel R and the green sub-pixel G, when the compensated outgoing light of the red light compensation layer 140R is emitted from the red sub-pixel R area, it forms compensation for the large viewing angle, but when the compensated outgoing light of the red light compensation layer 140R is emitted from the blue sub-pixel B, it will cause the side viewing angle of the blue sub-pixel B to mix colors, thereby forming an anti-peeping effect. Therefore, in the display panel 100 of the polarizer, when the red light compensation layer 140R is disposed on the right side of the red sub-pixel R, the effect of peek protection at the left viewing angle and light compensation at the right viewing angle is formed, that is, the left viewing angle cannot be seen clearly, but the right viewing angle is clearer. However, the COE display panel 100 does not have the above phenomenon. Since the blue sub-pixel B is provided with a blue filter, the red light emitted by the red light compensation layer 140R cannot pass through the blue filter. Therefore, the COE display panel 100 forms a single-side large viewing angle compensation effect.

[0058] Specifically, only one color of light compensation layer 140 is provided between two adjacent light emitting units 120 of different colors. Thus, large viewing angle compensation on a single side is achieved. Taking the display panel 100 with vertical monochrome and horizontal RGB circular arrangement as an example, a red light compensation layer 140R can be provided between two adjacent red sub-pixels R, a green light compensation layer 140G can be provided between two adjacent green sub-pixels G, and a blue light compensation layer 140B can be provided between two adjacent blue sub-pixels B. Only one color of light compensation layer 140 is provided between two sub-pixels of different colors, for example, a red light compensation layer 140R is provided between the red sub-pixel R and the green sub-pixel G, a green light compensation layer 140G is provided between the green sub-pixel G and the blue sub-pixel B, and a blue light compensation layer 140B is provided between the blue sub-pixel B and the red sub-pixel R. Generally speaking, light compensation layers 140 of the same color can be uniformly provided on the left or right side of the sub-pixel of the corresponding color, thereby achieving large viewing angle light compensation on the left or right side.

[0059] Figure 7 is a schematic diagram of the display device of the present application, see Figure 7 As shown, the present application also discloses a display device, wherein the display device 200 includes a driving circuit 210 and a display panel 100, wherein the driving circuit 210 is used to drive the display panel 100 to display.

[0060] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0061] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate substrate; A pixel definition layer is disposed on the base substrate and forms a plurality of opening areas; A plurality of light emitting units are arranged on the base substrate and located in the opening area; A compensation light source is arranged on the pixel definition layer and located in the non-opening area; An encapsulation layer, arranged to cover the light-emitting unit and to seal the light-emitting unit; as well as A light shielding layer, disposed on the compensation light source and located in the non-opening area, for shielding the outgoing light of the compensation light source perpendicular to the base substrate; Wherein, the compensation light source is used to provide the light-emitting unit with a compensation light of a preset angle when the adjacent light-emitting unit emits light for display, and the intensity of the compensation light varies with the light intensity of the adjacent light-emitting unit; The compensation light source includes a non-visible light excitation layer and a light compensation layer; the light compensation layer is formed of a metal organic framework material, and the metal organic framework material includes a lanthanide metal organic framework material; the light compensation layer is used to generate visible light under non-visible light excitation, and the visible light includes one of blue light, green light or red light; the non-visible light excitation layer is used to emit non-visible light under voltage drive; The light compensation layer at least includes a first light compensation part and a second light compensation part, and the non-visible light excitation layer at least includes a first excitation layer and a second excitation layer, the first light compensation part is used to emit a first compensation output light under the control of the first excitation layer, and the second light compensation part is used to emit a second compensation output light under the control of the second excitation layer, and the first excitation layer and the second excitation layer have different non-visible light wavelength ranges; wherein the intensity of the first compensation output light is less than the intensity of the second compensation output light; when the luminous intensity of the light-emitting unit is in the first range, the first light compensation part works, and when the luminous intensity of the light-emitting unit is in the second range, the second light compensation part works.

2. The display panel according to claim 1, characterized in that: A groove is arranged on the pixel definition layer, and the first light compensation part and the second light compensation part are arranged in the groove respectively.

3. The display panel according to claim 2, characterized in that: The first light compensation portion is disposed on the second light compensation portion, and the area of ​​the first light compensation portion is smaller than that of the second light compensation portion; The first excitation layer is disposed on the second excitation layer; the non-visible light emitted by the second excitation layer can pass through the first excitation layer and enter into the second light compensation part.

4. The display panel according to claim 2, characterized in that: The second light compensation portion is disposed around the first light compensation portion, and the first light compensation portion and the second light compensation portion are disposed in the same layer.

5. The display panel according to claim 1, characterized in that: The display panel includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, the light-emitting unit includes a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit, the red light-emitting unit is arranged corresponding to the red sub-pixel, the green light-emitting unit is arranged corresponding to the green sub-pixel, and the blue light-emitting unit is arranged corresponding to the blue sub-pixel; The light compensation layer includes a red light compensation layer, a green light compensation layer and a blue light compensation layer, wherein the red light compensation layer is arranged on one side or multiple sides of the red light emitting unit, the green light compensation layer is arranged on one side or multiple sides of the green light emitting unit, and the blue light compensation layer is arranged on one side or multiple sides of the blue light emitting unit; A light compensation layer of only one color is arranged between two adjacent light emitting units of different colors.

6. The display panel according to claim 1, characterized in that: The light compensation layer includes multiple groups of light compensation parts, and the non-visible light excitation layer includes multiple groups of excitation layers that emit non-visible light of different wavelengths. The number of the light compensation parts is the same as the number of the excitation layers, and a group of the light compensation parts is used to emit compensated output light under the control of a group of the excitation layers.

7. The display panel according to claim 6, characterized in that: The display panel controls the number of the excitation layers working to control the intensity of the compensated emitted light emitted by the light compensation unit; when the light intensity of the light emitting unit is greater, the number of the excitation layers working is greater.

8. A display device, characterized in that: It comprises a driving circuit and the display panel according to any one of claims 1 to 7, wherein the driving circuit is used to drive the display panel to display.

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