Display panel and display device

Abstract

The present application discloses a display panel and a display device. The display panel includes a substrate, a pixel driving layer, a light-emitting unit layer, a packaging layer, and a light-adjusting layer. The pixel driving layer is disposed on the substrate; the light-emitting unit layer is disposed on the pixel driving layer; the packaging layer is disposed on the light-emitting unit layer; and the light-adjusting layer is disposed on the packaging layer. Wherein, the light-adjusting layer adjusts the transmittance of the light-adjusting layer according to the brightness of the light-emitting unit layer. By providing the light-adjusting layer, the present application adjusts the transmittance of the light-adjusting layer according to the display image of the display panel, realizes the filtering of external ambient light, reduces phenomena such as color halos and glare caused by ambient light, and improves the display effect of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] With the continuous development of OLED (Organic Light-Emitting Diode) display technology, OLED has been increasingly widely used in displays such as smartphones, tablets, computers, and TVs. OLED displays have the advantages of being thin and light, having high contrast, fast response, wide viewing angles, high brightness, and full color. In order to reduce the reflectance of external light in an OLED display, the current mainstream solution is to attach a circular polarizer to the light-emitting surface of the OLED display. A circular polarizer is an assembly composed of a polarizer and a quarter-wave plate, which can absorb ambient light. However, due to the large light loss of the circular polarizer, the light-emitting effect is reduced. Another solution is to provide a color filter on the light-emitting surface of the OLED display to improve the light-emitting efficiency, and the effect of reducing the reflection of ambient light in the OLED display can be achieved by setting a black matrix (BM).

[0003] However, due to the characteristics of the color filter structure itself, when the display panel is not displaying, ambient light enters the display panel and is reflected by the metal electrodes, resulting in color mixing and a serious problem of color halos. Summary of the Invention

[0004] The objective of this application is to provide a display panel and a display device. By providing a light adjustment layer and adjusting the transmittance of the light adjustment layer according to the display image of the display panel, the filtering of external ambient light is achieved, reducing phenomena such as color halos and glare caused by ambient light, and improving the display effect of the display panel.

[0005] This application discloses a display panel, including a substrate, a pixel driving layer, a light-emitting unit layer, a packaging layer, and a light adjustment layer. The pixel driving layer is disposed on the substrate; the light-emitting unit layer is disposed on the pixel driving layer; the packaging layer is disposed on the light-emitting unit layer; and the light adjustment layer is disposed on the packaging layer. Among them, the light adjustment layer adjusts the transmittance of the light adjustment layer according to the brightness of the light-emitting unit layer.

[0006] Optionally, when the light-emitting unit layer does not emit light, the light-adjusting layer is in a first state, and the light transmittance of the light-adjusting layer is between 0 and 5%; when the light-emitting intensity of the light-emitting unit layer is in a first range, the light-adjusting layer is in a second state, and the light transmittance of the light-adjusting layer is between 5% and 30%; when the light-emitting intensity of the light-emitting unit layer is in a second range, the light-adjusting layer is in a third state, and the light transmittance of the light-adjusting layer is between 30% and 100%; the second range is greater than the first range.

[0007] Optionally, the light-adjusting layer includes a heating layer and a thermo-responsive hydrogel layer that expands with heat. The heating layer is used to provide heat to the thermo-responsive hydrogel layer, and the thermo-responsive hydrogel layer is used to absorb different amounts of heat to produce different transmittances; the display panel further includes a control unit, and the control unit is used to control the heating layer to increase or decrease the temperature; when the control unit controls the heating layer not to work, the thermo-responsive hydrogel layer is in a first state; when the light-emitting intensity of the light-emitting unit layer is in a first range, the control unit controls the heating layer to heat up to a first temperature, and the thermo-responsive hydrogel layer is in a second state; when the light-emitting intensity of the light-emitting unit layer is in a second range, the control unit controls the heating layer to heat up to a second temperature, and the thermo-responsive hydrogel layer is in a third state.

[0008] Optionally, the light-adjusting layer further includes a sealing layer, a sealing cavity is provided in the sealing layer, and the thermo-responsive hydrogel layer is provided in the sealing cavity; a salt solution is also provided in the sealing cavity; the sealing layer is provided on the heating layer.

[0009] Optionally, the light-adjusting layer further includes a heat-insulating layer, and the heat-insulating layer is arranged to wrap the heating layer and the sealing layer, and the heat-insulating layer is used for heat insulation and heat preservation.

[0010] Optionally, the display panel further includes a pixel definition layer. The light-emitting unit layer is provided with a plurality of light-emitting units, and adjacent two of the light-emitting units are separated by the pixel definition layer. The pixel definition layer is provided in a non-opening area, and the light-emitting units are provided in an opening area; a plurality of sealing cavities are provided in the sealing layer, the thermo-responsive hydrogel layer includes a plurality of thermo-responsive hydrogel parts, and the plurality of thermo-responsive hydrogel parts are respectively provided in the plurality of sealing cavities and are respectively provided in the opening area.

[0011] Optionally, the light-adjusting layer further includes a light-shielding layer, and the light-shielding layer is provided between adjacent two of the sealing cavities and is located in the non-opening area.

[0012] Optionally, the heating layer is formed of a wave-absorbing heating material and is used to convert into a temperature rise after absorbing ultrasonic waves.

[0013] Optionally, the display panel further includes a color filter layer disposed between the encapsulation layer and the light adjustment layer.

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

[0015] In the present application, by providing a light adjustment layer and utilizing the function of the light adjustment layer to adjust the transmittance, when the display panel does not display or displays at a low gray level, the light adjustment layer is adjusted to a lower transmittance, so that as little external ambient light as possible enters the interior of the display panel, effectively absorbing the external ambient light, making the black state of the display panel darker when not displaying, and preventing the problem of glare when displaying at a low brightness. When the display panel displays at a high gray level, the light adjustment layer is adjusted to a higher transmittance. At this time, even if the ambient light enters the interior of the display panel, since the display gray level of the display panel is high, the addition of the ambient light has little impact on the display effect and does not affect the original outgoing light, thus not affecting the display effect. By providing a light adjustment layer in the present application, the design of a polarizer or a color filter can be cancelled, and the filtering of external ambient light is achieved by adjusting the transmittance of the light adjustment layer, improving the quality of the display panel. Description of the Drawings

[0016] The accompanying drawings included are used to provide a further understanding of the embodiments of the present application, which form a part of the specification, illustrate the implementation manners of the present application, and together with the text description explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

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

[0018] Figure 2 is a schematic diagram of the light adjustment layer of the present application;

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

[0020] Figure 4 is a schematic diagram of the display panel according to the third embodiment of the present application;

[0021] Figure 5 is a schematic diagram of the display device of the present application.

[0022] Among them, 100 is a display panel; 101 is an opening area; 102 is a non-opening area; 110 is a substrate; 120 is a pixel driving layer; 130 is a light-emitting unit layer; 131 is a light-emitting unit; 140 is a packaging layer; 150 is a light regulation layer; 151 is a heating layer; 152 is a thermo-responsive hydrogel layer; 153 is a thermo-responsive hydrogel part; 154 is a sealing layer; 154a is a sealing cavity; 155 is a heat insulation layer; 156 is a light shielding layer; 160 is a pixel definition layer; 170 is a color filter layer; 171 is a color filter part; 172 is a black matrix; 180 is a control unit; 200 is a display device; 210 is a driving circuit. Detailed implementation manners

[0023] It should be understood that the terms, specific structures and functional details disclosed herein are only for the purpose of describing specific embodiments, which are representative, but the present application can be specifically implemented in many alternative forms and should not be construed as being limited only to the embodiments set forth herein.

[0024] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating relative importance or implicitly indicating the number of the indicated technical features. Thus, unless otherwise specified, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; the meaning of "a plurality" is two or more. In addition, the terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "vertical", "horizontal", etc. are described based on the orientation or relative positional relationship shown in the drawings, and are only for the convenience of describing the present application in a simplified manner, rather than indicating that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to 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 specific circumstances.

[0025] The present application will be described in detail below with reference to the accompanying drawings and optional embodiments.

[0026] Figure 1 It is a schematic diagram of the display panel according to the first embodiment of the present application. Figure 2 It is a schematic diagram of the light regulation layer of the present application. Refer to Figure 1-2As shown in the figure, the present application discloses a display panel 100, which includes a substrate substrate 110, a pixel driving layer 120, a light-emitting unit layer 130, a packaging layer 140, and a light adjustment layer 150. The pixel driving layer 120 is disposed on the substrate substrate 110, the light-emitting unit layer 130 is disposed on the pixel driving layer 120, the packaging layer 140 is disposed on the light-emitting unit layer 130, and the light adjustment layer 150 is disposed on the packaging layer 140. Wherein, the light adjustment layer 150 adjusts the transmittance of the light adjustment layer 150 according to the brightness of the light-emitting unit layer 130.

[0027] In the present application, by providing the light adjustment layer 150 and utilizing the function of the light adjustment layer 150 to adjust the transmittance, when the display panel 100 does not display or displays in a low gray scale, the light adjustment layer 150 is adjusted to a lower light transmittance, so that as little external ambient light as possible enters the interior of the display panel 100, realizing the effective absorption of the external ambient light, making the black state of the display panel 100 darker when not displaying, and there will be no problem of glare when displaying at a low brightness. When the display panel 100 displays in a high gray scale, the light adjustment layer 150 is adjusted to a higher light transmittance. At this time, even if the ambient light enters the interior of the display panel 100, due to the higher display gray scale of the display panel 100, the addition of the ambient light has little impact on the display effect and will not affect the original outgoing light, and thus will not affect the display effect. By providing the light adjustment layer 150 in the present application, the design of the polarizer or color filter can be cancelled, and the filtering of the external ambient light is realized by adjusting the transmittance of the light adjustment layer 150, improving the quality of the display panel 100.

[0028] Among them, the light adjustment layer 150 includes three states. In the first state, the transmittance of the light adjustment layer 150 varies between 0 and 5%. In the second state, the transmittance of the light adjustment layer 150 varies between 5% and 30%. In the third state, the transmittance of the light adjustment layer 150 varies between 30% and 100%.

[0029] For example, when the display panel 100 does not display or displays in a low gray scale or is in the screen-off display state, the light adjustment layer 150 can be made to be in the first state.

[0030] For example, when the light-emitting intensity of the light-emitting unit layer 130 is in the first range, the light adjustment layer 150 is in the second state, and the light transmittance of the light adjustment layer 150 is between 5% and 30%.

[0031] For example, when the light-emitting intensity of the light-emitting unit layer 130 is in the second range, the light adjustment layer 150 is in the third state, and the light transmittance of the light adjustment layer 150 is between 30% and 100%.

[0032] Among them, the light-emitting intensity of the light-emitting unit layer 130 can be judged according to the gray scale. With 0 to 255 gray scales, the higher the gray scale number, the greater the light-emitting intensity of the light-emitting unit 131. On the contrary, the smaller the gray scale number, the smaller the light-emitting intensity of the light-emitting unit 131. Therefore, the light-emitting intensity of the light-emitting unit layer 130 can be judged by judging the display gray scale of the display panel 100. In this embodiment, the gray scale between 0 and 127 is defined as the low gray scale, and the gray scale between 128 and 255 is defined as the high gray scale.

[0033] It can be understood that the light-adjusting layer 150 of the present application can be switched between three states according to the temperature or the intensity of external light. For example, the light-adjusting layer 150 can be formed of a thermally expandable and temperature-sensitive hydrogel material or a photosensitive hydrogel material, and can generate phase change reactions to temperature and light intensity respectively.

[0034] Among them, the hydrogel material is synthesized by monomers or polymers through forming a water-permeable cross-linked network. After polymerization of monomers to form polymers, and then through a gel process (cross-linking method) to form an interpenetrating polymer network (IPN), the hydrogel material can retain a large amount of water and maintain a three-dimensional network structure. The cross-linking of the condensed network can be divided into non-covalent bonds (i.e., physical cross-linking) or covalent bonds (i.e., chemical cross-linking). Hydrogels are usually jelly-like solids and have elasticity.

[0035] The polymer hydrogel material can be defined as a cross-linked polymer that can swell in water and retain a large amount of water without being dissolved. The forces inducing the phase transition of polymers are classified into four categories: hydrophobic interaction, hydrophilic interaction (including hydrogen bond and solvation of water), van der Waals force, and electrostatic interaction between ions. With the change of the external environment, these four forces compete with each other, causing the conformation of polymer segments in the solution to change, and finally leading to the occurrence of phase transition.

[0036] When the macromolecular chain has both hydrophilic groups and hydrophobic groups at the same time, the linear polymer in the aqueous solution will change the molecular chain conformation with the change of the solution temperature, changing from an extended random coil shape to a curled globular shape. This conformational change is generally considered to be the result of the competition between hydrophilic and hydrophobic interactions. For example, substances such as polyacrylamide and polyacrylic acid have thermally expandable temperature sensitivity. Based on this kind of high polymer, chitosan-based hydrogel polymers can be adjusted in composition to have different temperature phase transition capabilities, and their light transmittance is different under different phase transition degrees.

[0037] For the method of switching based on the intensity of external light, since the ambient light is relatively complex and the usage scenarios are also complex, it is more difficult to implement compared to the three states of using temperature to adjust the light adjustment layer 150. Therefore, in this embodiment, mainly taking the example of switching the three states of the light adjustment layer 150 by changing temperature for illustration.

[0038] Continue to refer to Figure 1-2 As shown, in this embodiment, the light adjustment layer 150 includes a heating layer 151 and a heat-expandable and temperature-sensitive hydrogel layer 152. The heating layer 151 is used to provide heat for the heat-expandable and temperature-sensitive hydrogel layer 152, and the heat-expandable and temperature-sensitive hydrogel layer 152 is used to absorb different amounts of heat to generate different transmittances. The display panel 100 further includes a control unit 180, and the control unit 180 is used to control the heating layer 151 to increase or decrease the temperature.

[0039] In this embodiment, mainly the state of the heat-expandable and temperature-sensitive hydrogel layer 152 is controlled by the heating layer 151, so that the heat-expandable and temperature-sensitive hydrogel layer 152 can be switched between a first state, a second state, and a third state. The heat-expandable and temperature-sensitive hydrogel layer 152 can be disposed on the encapsulation layer 140 and under the cover plate, with a thickness between 1 um and 5 um, covering the entire display area of the display panel 100 and slightly larger than the display area of the display panel 100, that is, the four sides of the heat-expandable and temperature-sensitive hydrogel layer 152 extend 500 um to 1000 um beyond the display area. By disposing the entire surface of the heat-expandable and temperature-sensitive hydrogel layer 152 in the display area, the phenomenon of glare caused by external ambient light entering the interior of the display panel 100 is improved. Of course, the heating layer 151 is also disposed on the entire surface of the light-emitting unit layer 130. In this embodiment, the light adjustment layer 150 composed of the heating layer 151 and the heat-expandable and temperature-sensitive hydrogel layer 152 can replace the circular polarizer in the exemplary display panel 100, or replace the color filter or be added above the color filter, and the light is adjusted through the light adjustment layer 150 to improve the display effect of the display panel 100.

[0040] Specifically, when the control unit 180 controls the heating layer 151 not to work, at this time, the heat-expandable and temperature-sensitive hydrogel layer 152 is at room temperature, for example, in the range of 0 degrees Celsius to 25 degrees Celsius, and the heat-expandable and temperature-sensitive hydrogel layer 152 is in the first state.

[0041] When the light-emitting intensity of the light-emitting unit layer 130 is in a first range, for example, when the gray scale of the display panel 100 is between 0 and 127, the control unit 180 controls the heating layer 151 to heat up to a first temperature, for example, between 25 degrees Celsius and 30 degrees Celsius, and the heat-expandable and temperature-sensitive hydrogel layer 152 is in the second state.

[0042] When the luminous intensity of the light-emitting unit layer 130 is within the second range, for example, when the gray scale of the display panel 100 is between 127 and 255, when the control unit 180 controls the temperature-rising layer 151 to rise to the second temperature, for example, between 30 degrees Celsius and 40 degrees Celsius, the thermo-responsive hydrogel layer 152 is in the third state.

[0043] When the thermo-responsive hydrogel layer 152 is in the first state, at this time, the hydrogel material in the light-adjusting layer 150 is in a mass state. Although there is a transmittance of 5%, due to light refraction, scattering and other situations, the light actually entering from the outside and reflected by the metal electrodes inside the display panel 100 is extremely small. When the thermo-responsive hydrogel layer 152 is in the second state, the transmittance can continuously change between 5% and 30% at this time. For example, as the temperature rises, the transmittance increases linearly or non-linearly. However, when the temperature rises to the second temperature range, at this time, the thermo-responsive hydrogel layer 152 will undergo a significant phase change, and the transmittance jumps from 30% to 80% or 100%. That is, when the thermo-responsive hydrogel layer 152 is in the third state, within the second temperature range, a relatively high transmittance is basically maintained, so that the display panel 100 has a relatively high transmittance.

[0044] It is worth mentioning that when the display panel 100 performs low gray-scale display, the loss caused by the reduction of the transmittance of the light-adjusting layer 150 can also be offset by controlling the light-emitting unit 131 to increase the luminous brightness. The specific increased brightness still needs to be designed according to the actual situation.

[0045] Specifically, the light-adjusting layer 150 further includes a sealing layer 154. A sealing cavity 154a is provided inside the sealing layer 154, and the thermo-responsive hydrogel layer 152 is disposed inside the sealing cavity 154a; a salt solution is also provided inside the sealing cavity 154a; the sealing layer 154 is disposed on the temperature-rising layer 151. Since the thermo-responsive hydrogel layer 152 has a better phase change effect in the solution, therefore, the thermo-responsive hydrogel layer 152 can be sealed with the salt solution to achieve the encapsulation of the thermo-responsive hydrogel layer 152. The material of the sealing layer 154 can be selected from polymer polyethylene materials to form a flexible sealing cavity 154a, and a salt solution and a thermo-responsive hydrogel material can be provided inside the sealing cavity 154a. In this embodiment, the light-adjusting layer 150 or the sealing layer 154 can be set in the form of a film and pasted to one side of the cover plate of the display panel 100 close to the substrate 110 or on the encapsulation layer 140.

[0046] In one embodiment, the light-adjusting layer 150 further includes a heat-insulating layer 155. The heat-insulating layer 155 is disposed to wrap the temperature-rising layer 151 and the sealing layer 154, and the heat-insulating layer 155 is used for heat insulation and heat preservation.

[0047] The heat insulation layer 155 has the functions of heat preservation and heat insulation. When the temperature-rising layer 151 raises the temperature of the thermo-responsive hydrogel layer 152, the temperature of the thermo-responsive hydrogel layer 152 is maintained in the second state or the third state through the action of the heat insulation layer 155. It can be formed by using light-transmitting inorganic or organic polymer materials, such as zirconia ceramic materials, polyester, polyimide films and other materials. Through the excellent heat insulation performance of the above materials, the influence of the ambient temperature on the thermo-responsive hydrogel layer 152 can be reduced as much as possible.

[0048] Regarding the material selection of the temperature-rising layer 151, a resistive heating element can be used to heat the thermo-responsive hydrogel layer 152 based on the principle of resistance heating. Through an electrical control method, the advantages are high accuracy and strong controllability. However, circuit design is required and the complexity is relatively high.

[0049] In another embodiment, the temperature-rising layer 151 can also be selected as a wave-absorbing temperature-rising material for converting into a temperature rise after absorbing ultrasonic waves. A wave-absorbing material can absorb or weaken the electromagnetic wave energy projected onto its surface and convert the electromagnetic wave energy into heat energy or other forms through the medium loss or magnetic loss of the material. The wave-absorbing temperature-rising material includes a graphene / vanadium dioxide composite aerogel material or a ceramic wave-absorbing fiber material. The graphene / vanadium dioxide composite aerogel material has the function of temperature rise under ultrasonic waves and has different temperature-rise gradients under ultrasonic waves of different wavelengths. For example, the longer the wavelength, the higher the temperature rise. Of course, ultrasonic waves of the same wavelength can also be used, and by adjusting the time parameter, the temperature-rising layer 151 can reach the target temperature. The representative of the ceramic wave-absorbing fiber material is silicon carbide (SiC). In silicon carbide (SiC), the low absorption frequency band is from 2 GHz to 7 GHz for ultrasonic waves, and the absorption degree of ultrasonic waves is relatively low. The high absorption frequency band is from 8 GHz to 18 GHz, and the maximum absorption degree of ultrasonic waves can reach 90%. By adjusting the wavelength and time parameter, rapid temperature rise to the target temperature can be achieved.

[0050] The above wave-absorbing temperature-rising material needs to absorb an external wave source to generate heat. The frequency, wave intensity and time of ultrasonic waves will affect the temperature of the thermal conversion of the wave-absorbing material. Therefore, by adjusting this, the heat change of the thermo-responsive hydrogel layer 152 can be completed, and the presence of the heat insulation layer 155 after temperature rise will also maintain the internal temperature, ensuring the phase change stability of the hydrogel. The control unit 180 can be an ultrasonic emission structure and is arranged on the back or the shell of the display panel 100.

[0051] Specific judgment conditions: When most pixels or more than half of the pixels of the display panel 100 are in a low gray scale, it is determined that the current display panel 100 is in a low gray scale display, and the thermo-responsive hydrogel layer 152 is converted to the second state so that it can filter most of the external environmental light during display. When most pixels or more than half of the pixels of the display panel 100 are in a high gray scale, it is determined that the current display panel 100 is in a high gray scale display. Of course, zonal control can also be performed, which will be specifically described in the subsequent embodiments.

[0052] It should be understood that since the display panel 100 generates a relatively large amount of heat during operation, for the light adjustment layer 150 in this embodiment, the heat generated by the display panel 100 can also provide heat for the thermo-responsive hydrogel layer 152 to maintain it in the first state or the second state.

[0053] In this application, by providing the light adjustment layer 150 and utilizing the function of the light adjustment layer 150 to adjust the transmittance, when the display panel 100 is not displaying, that is, in the off-screen state or the off-screen display state, the transmittance of the light adjustment layer 150 is set between 0 and 5%, which can effectively absorb ambient light and avoid the problem of color separation or glare caused by the reflection of the ambient light by the metal electrodes after entering the interior of the display panel 100. When the display panel 100 performs a low gray scale display, after the temperature-raising layer 151 in the light adjustment layer 150 controls the temperature increase, the transmittance of the thermo-responsive hydrogel layer 152 can vary between 5% and 30%. At this time, by increasing the luminous efficiency of the light-emitting unit 131, such as increasing the excitation current or external compensation, the display brightness under normal gray scale can be achieved at this transmittance to reduce the influence of ambient light. When the display panel 100 performs a high gray scale display, after the temperature-raising layer 151 of the light adjustment layer 150 further increases the temperature, the transmittance of the thermo-responsive hydrogel layer 152 can vary between 30% and 100%. At this time, even if there is the influence of external ambient light, since the intensity of the emitted light of the light-emitting unit 131 is high, the external ambient light basically does not affect the normal display. By providing the light adjustment layer 150 in this application, the design of the polarizer or color filter can be cancelled, and the transmittance adjustment of the light adjustment layer 150 is utilized to filter the external ambient light and improve the quality of the display panel 100.

[0054] Embodiment 2:

[0055] Figure 3 is a schematic diagram of the display panel according to the second embodiment of the present application. Refer to Figure 3As shown, based on the above embodiments, the present application further designs a zoning scheme. Specifically, the display panel 100 further includes a pixel definition layer 160. The light-emitting unit layer 130 is provided with a plurality of light-emitting units 131. Adjacent two light-emitting units 131 are separated by the pixel definition layer 160. The pixel definition layer 160 is disposed in the non-opening area 102, and the light-emitting unit 131 is disposed in the opening area 101; the light-adjusting layer 150 may include a plurality of light-adjusting parts, and each light-adjusting part can independently adjust the transmittance.

[0056] In this embodiment, by disposing the light-adjusting layer 150 according to the zoning of the opening area 101, one light-adjusting part can correspond to one opening area 101 or multiple opening areas 101. Generally speaking, one light-emitting unit 131, that is, one sub-pixel, is disposed in one opening area 101. Three sub-pixels of different colors can form one pixel. The light-adjusting part in this embodiment can be set to correspond to at least one sub-pixel at the minimum. In practical applications, the area of one light-adjusting part can be set larger, for example, corresponding to one pixel or multiple pixels, so as to reduce the process cost and achieve lower cost.

[0057] In one embodiment, a plurality of sealing cavities 154a are provided in the sealing layer 154. Each sealing cavity 154a serves as one light-adjusting part. A plurality of sealing cavities 154a are provided in the sealing layer 154. The thermally expandable and temperature-sensitive hydrogel layer 152 includes a plurality of thermally expandable and temperature-sensitive hydrogel parts 153. The plurality of thermally expandable and temperature-sensitive hydrogel parts 153 are respectively disposed in the plurality of sealing cavities 154a, and the plurality of thermally expandable and temperature-sensitive hydrogel parts 153 are respectively disposed in the opening area 101.

[0058] In the specific design, the width of the sealing cavity 154a should be greater than the width of the opening area 101, for example, greater than the width of the opening area 101 by 5 μm to 10 μm, so that the opening area 101 can be covered by the thermally expandable and temperature-sensitive hydrogel material as much as possible, realizing the adjustment of the light transmittance of the opening area 101, especially for the adjustment of the incident external ambient light.

[0059] The difference between this embodiment and the previous embodiment is that in this embodiment, through the zoning setting method, when, for example, some pixels are displayed and some are not, the light-adjusting layer 150 in the above two areas can be controlled to have different transmittances.

[0060] Specifically, in the display panel 100, when some pixels (sub-pixels) are not displayed, the transmittance of the light adjustment layer 150 in this area is set between 0% and 5%, which can effectively absorb ambient light and avoid the problem of color separation or glare caused by the reflection of the ambient light by the metal electrodes after entering the interior of the display panel 100. When some pixels (sub-pixels) are displayed at low gray levels, after the temperature increase layer 151 in the light adjustment layer 150 controls the temperature increase, the transmittance of the thermo-expansion and temperature-sensitive hydrogel part 153 can vary between 5% and 30%. At this time, by increasing the luminous efficiency of the light-emitting unit 131, such as increasing the excitation current or external compensation, the display brightness at the normal gray level can be achieved at this transmittance to reduce the influence of ambient light. When some pixels (sub-pixels) are displayed at high gray levels, after the temperature increase layer 151 of the light adjustment layer 150 further increases the temperature, the transmittance of the thermo-expansion and temperature-sensitive hydrogel part 153 can vary between 30% and 100%. At this time, even if there is the influence of external ambient light, due to the high intensity of the emitted light of the light-emitting unit 131, the external ambient light basically does not affect the normal display. By setting the light adjustment layer 150, the design of the polarizer or color filter can be cancelled, and the transmittance adjustment of the light adjustment layer 150 is used to filter the external ambient light and improve the quality of the display panel 100.

[0061] In an embodiment, the light adjustment layer 150 further includes a light-shielding layer 156. The light-shielding layer 156 is disposed between two adjacent sealing cavities 154a and is located in the non-opening area 102. By using the light-shielding layer 156 to isolate light between adjacent light adjustment parts, color interference between adjacent sub-pixels and color mixing can be prevented.

[0062] Embodiment Three:

[0063] Figure 4 is a schematic diagram of the display panel of the third embodiment of the present application. Refer to Figure 4 As shown, on the basis of the above Embodiment One or Two, a color filter layer 170 is additionally added in this embodiment. The display panel 100 further includes a color filter layer 170. The color filter layer 170 is disposed between the encapsulation layer 140 and the light adjustment layer 150.

[0064] The color filter layer 170 includes a plurality of color filter portions 171, such as a red filter portion, a blue filter portion, and a green filter portion. Each color filter portion 171 is respectively disposed in an opening area 101, and adjacent color filter portions 171 can be separated by a black matrix 172, and the black matrix 172 is disposed in the non-opening area 102. The main function of the black matrix 172 is to prevent color bleeding between different colors. A black matrix 172 is provided between different color filter portions 171 to absorb the colored light at the edge of the color filter portion 171. However, due to the characteristics of the structure of the color filter layer 170 itself, when the display panel 100 is in a black state, the natural light is filtered by the color filter layer 170 and then reflected by the anode and emitted. Since the reflected natural light will be mixed, serious color halos can be seen on the screen, resulting in the phenomenon that the black state is not black enough.

[0065] In this embodiment, the light regulating layer 150 is disposed above the color filter layer 170. On the one hand, it can achieve better filtering of the external ambient light. And the light regulating layer 150 in this embodiment only needs two states, that is, the first state with a transmittance between 0% and 5% in the first and second embodiments above, and the third state with a transmittance above 30%. Moreover, in the third state, when the temperature rises to the second temperature range, the thermally expandable and temperature-sensitive hydrogel layer 152 will undergo a significant phase change, and the transmittance jumps from 30% to 80% or 100%. That is, when the thermally expandable and temperature-sensitive hydrogel layer 152 is in the third state and the temperature is within the second temperature range, it basically maintains a high transmittance, at least greater than 80%, so that the display panel 100 has a high transmittance.

[0066] In the display panel 100, taking the non-zoned setting of the light regulating layer 150 as an example, when the display panel 100 is not displaying, that is, in the off-screen state or the off-screen display state, setting the transmittance of the light regulating layer 150 between 0 and 5% can effectively absorb the ambient light and avoid the problem of color separation or glare caused by the reflection of the ambient light incident on the inside of the display panel 100 by the metal electrodes. In the display state of the display panel 100, including low gray-scale display and high gray-scale display, setting the transmittance of the light regulating layer 150 above 80%, at this time, since the color filter layer 170 also has a certain filtering ability, part of the external ambient light can be filtered, and thus problems such as glare can be prevented. Among them, the difference between the off-screen state and the display state is that the number of sub-pixels displayed in the off-screen state is much less than the number of sub-pixels displayed in the display state.

[0067] In the display panel 100, taking the light adjustment layer 150 set in partitions as an example, when some pixels or sub-pixels are not displayed, the transmittance of the light adjustment layer 150 in the area where the non-display pixels are located or the entire area can be set between 0% and 5%, which can effectively absorb ambient light and avoid the problem of color separation or glare caused by the reflection of the ambient light by the metal electrodes after entering the interior of the display panel 100. When some pixels or sub-pixels are displayed, after the temperature-rising layer 151 of the light adjustment layer 150 is heated, the transmittance of the thermo-responsive hydrogel layer 152 can vary between 80% and 100%. At this time, since the color filter layer 170 also has a certain filtering ability, it can filter some external ambient light, thereby preventing problems such as glare.

[0068] Figure 5 is a schematic diagram of the display device of the present application. Refer to Figure 5 As shown, the present application also discloses a display device. The display device 200 includes a driving circuit 210 and a display panel 100. The display panel 100 can be any one of the display panels 100 in the above embodiments. Among them, the driving circuit is used to drive the display panel 100 to display.

[0069] It should be noted that the inventive concept of the present application can form a very large number of embodiments. However, due to the limited space of the application documents, it is impossible to list them all. Therefore, on the premise of no conflict, the above-described embodiments or technical features can be combined arbitrarily to form new embodiments. After the combination of each embodiment or technical feature, the original technical effect will be enhanced.

[0070] The above content is a further detailed description of the present application in combination with specific optional implementation manners. It cannot be determined that the specific implementation of the present application is only limited to these descriptions. For those of ordinary skill in the technical field to which the present application belongs, without departing from the concept of the present application, several simple deductions or substitutions can be made, which should all be regarded as belonging to the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: substrate substrate; A pixel driving layer is arranged on the base substrate; A light emitting unit layer, arranged on the pixel driving layer; An encapsulation layer, disposed on the light-emitting unit layer; as well as A light adjustment layer, disposed on the encapsulation layer; Wherein, the light adjustment layer adjusts the transmittance of the light adjustment layer according to the brightness of the light emitting unit layer; When the light-emitting unit layer does not emit light, the light adjustment layer is in a first state, and the light transmittance of the light adjustment layer is between 0 and 5%; when the light intensity of the light-emitting unit layer is in a first range, the light adjustment layer is in a second state, and the light transmittance of the light adjustment layer is between 5% and 30%; when the light intensity of the light-emitting unit layer is in a second range, the light adjustment layer is in a third state, and the light transmittance of the light adjustment layer is between 30% and 100%; the second range is greater than the first range; The light adjustment layer includes a temperature-raising layer and a heat-expanding temperature-sensitive hydrogel layer, wherein the temperature-raising layer is used to provide heat for the heat-expanding temperature-sensitive hydrogel layer, and the heat-expanding temperature-sensitive hydrogel layer is used to absorb different amounts of heat to generate different transmittances; The display panel further includes a control unit, and the control unit is used to control the temperature increase or decrease of the temperature increasing layer; When the control unit controls the temperature-raising layer to not work, the thermal expansion temperature-sensitive hydrogel layer is in the first state; When the luminous intensity of the luminous unit layer is in the first range, the control unit controls the temperature-raising layer to rise to the first temperature, and the thermal expansion temperature-sensitive hydrogel layer is in the second state; When the luminous intensity of the luminous unit layer is in the second range, and the control unit controls the temperature-raising layer to rise to the second temperature, the thermal expansion temperature-sensitive hydrogel layer is in the third state.

2. The display panel according to claim 1, characterized in that: The light adjustment layer further comprises a sealing layer, a sealing cavity is arranged in the sealing layer, the heat-expandable temperature-sensitive hydrogel layer is arranged in the sealing cavity; a salt solution is also arranged in the sealing cavity; The sealing layer is arranged on the temperature raising layer.

3. The display panel according to claim 2, characterized in that: The light adjustment layer also includes a heat insulation layer, which is arranged to wrap the temperature increasing layer and the sealing layer, and the heat insulation layer is used for heat insulation and heat preservation.

4. The display panel according to claim 3, characterized in that: The display panel further comprises a pixel definition layer, the light emitting unit layer is provided with a plurality of light emitting units, two adjacent light emitting units are separated by the pixel definition layer, the pixel definition layer is provided in the non-opening area, and the light emitting units are provided in the opening area; A plurality of sealing cavities are arranged in the sealing layer, and the heat-expandable temperature-sensitive hydrogel layer includes a plurality of heat-expandable temperature-sensitive hydrogel parts, which are respectively arranged in the plurality of sealing cavities, and the plurality of heat-expandable temperature-sensitive hydrogel parts are respectively arranged in the opening area.

5. The display panel according to claim 4, characterized in that: The light adjustment layer further includes a light shielding layer, which is disposed between two adjacent sealed cavities and located in the non-opening area.

6. The display panel according to claim 1, characterized in that: The temperature-raising layer is formed of a wave-absorbing temperature-raising material, and is used to convert the absorbed ultrasonic waves into a temperature rise.

7. The display panel according to claim 1, characterized in that: The display panel further includes a color filter layer, and the color filter layer is arranged between the encapsulation layer and the light adjustment layer.

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.

Images