Display panel and display device

Abstract

The present application discloses a display panel and a display device, wherein the display panel includes a base substrate, a light source layer, a pixel layer, and an encapsulation layer, wherein the light source layer is arranged on the base substrate; the pixel layer is arranged on the light source layer, and the light emitted by the light source layer is emitted from the pixel layer; the encapsulation layer is arranged on the pixel layer; wherein the pixel layer includes a black matrix and a plurality of pixel portions, and two adjacent pixel portions are separated by the black matrix, and the pixel portions include a light adjustment layer, and the light adjustment layer is formed using an electric field-sensitive hydrogel material, and the transmittance of the electric field-sensitive hydrogel material is adjustable between 0% and 90%. The present application realizes display of the display panel by adding a separately controlled light adjustment layer in the display panel to control the display grayscale of the display panel.

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] Due to the rise of flexible displays, wearable display devices are gradually attracting the attention of consumers. Flexible wearable display panels need to be wearable, so they need to be ultra-thin and ultra-light, while also having environmental stability.

[0003] Traditional display panels, such as liquid crystal displays (LCDs), require a liquid crystal cell for deflection. These cells are difficult to bend, making them challenging to implement for flexible displays. Organic light-emitting diode (OLED) panels suffer from poor environmental stability and high costs. Wearable display panels, however, have less stringent requirements for refresh rate and response time, necessitating a new type of display panel for wearable displays. Summary of the Invention

[0004] The purpose of the present application is to provide a display panel and a display device, which realizes display of the display panel by controlling the display grayscale of the display panel by adding a separate light adjustment layer in the display panel.

[0005] The present application discloses a display panel, which includes a base substrate, a light source layer, a pixel layer and an encapsulation layer, wherein the light source layer is arranged on the base substrate; the pixel layer is arranged on the light source layer, and the light emitted by the light source layer is emitted from the pixel layer; the encapsulation layer is arranged on the pixel layer; wherein the pixel layer includes a black matrix and a plurality of pixel portions, and two adjacent pixel portions are separated by the black matrix, and the pixel portion includes a light adjustment layer, and the light adjustment layer is formed of an electric field-sensitive hydrogel material, and the transmittance of the electric field-sensitive hydrogel material is adjustable between 0% and 90%.

[0006] Optionally, the pixel portion further includes a color filter portion, the width of the color filter portion is less than or equal to the width of the light adjustment layer, and the color filter portion includes one or more of a red filter portion, a green filter portion or a blue filter portion; the color filter portion is arranged on the light adjustment layer.

[0007] Optionally, the color filter portion is formed by doping a hydrogel material with a polymer color resist material; the pixel portion also includes an electro-expansion portion, which is arranged around the color filter portion, and the electro-expansion portion is used to expand or contract under the action of an electric field; along a direction perpendicular to the light output direction, the color filter portion can be deformed under the action of the electro-expansion portion to change the projection area of ​​the color filter portion on the base substrate.

[0008] Optionally, when the electroexpandable portion expands under the action of an electric field, the projected area of ​​the color filter portion on the base substrate decreases; when the electroexpandable portion contracts under the action of an electric field, the projected area of ​​the color filter portion on the base substrate increases; when the electroexpandable portion contracts to a minimum contraction state under the action of an electric field, the projected area of ​​the color filter portion on the base substrate is in a maximum area state, and under the projection of the base substrate, the projection of the color filter portion does not overlap with the projection of the black matrix.

[0009] Optionally, the electrically expandable portion is formed of an electric field-sensitive hydrogel material, and the electrically expandable portion is opaque.

[0010] Optionally, the pixel portion further includes a first electrode and a second electrode, the first electrode being arranged on a side of the light adjustment layer away from the color filter portion, and the second electrode being arranged on a side of the color filter portion away from the light adjustment layer, and the first electrode and the second electrode being used to control the transmittance of the light adjustment layer.

[0011] Optionally, the pixel portion further includes a third electrode and a fourth electrode, the third electrode being arranged on one side of the electroexpandable portion, and the fourth electrode being arranged on the other side of the electroexpandable portion, and the third electrode and the fourth electrode being used to control the expansion and contraction of the electroexpandable portion.

[0012] Optionally, the pixel portion further includes a fifth electrode and a sixth electrode, the fifth electrode being arranged on a side of the electroexpansion portion away from the light adjustment layer, and the sixth electrode being arranged on the other side of the light adjustment layer away from the electroexpansion portion; under the orthographic projection of the base substrate, the fifth electrode and the sixth electrode are arranged to overlap, and the electroexpansion portion and the light adjustment layer are respectively within the projection range of the fifth electrode; the fifth electrode and the sixth electrode simultaneously control the electroexpansion portion and the light adjustment layer.

[0013] Optionally, the maximum width of the color filter portion is less than or equal to the width of the light adjustment layer, and the electroexpandable portion partially overlaps with the light adjustment layer.

[0014] The present application 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] This application achieves grayscale adjustment by providing an independently controllable light adjustment layer in each pixel. Compared to liquid crystal display panels, each light adjustment layer can be independently packaged for each pixel to meet the requirements of deformation and folding in flexible display panels. The independently packaged light adjustment layer does not affect the normal display effect when folding and bending. In addition, the light adjustment layer is formed of an electric field-sensitive hydrogel material. The transmittance of the light adjustment layer can be controlled by an electric field, achieving different light transmittances at different locations to display different images. The electric field-sensitive hydrogel material has good bending properties and has good deformation capabilities in flexible display panels. 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 those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive 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 an electroexpansion portion of a pixel portion of the present application;

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

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

[0022] Figure 6 is a schematic diagram of a display device of the present application.

[0023] Among them, 100, display panel; 110, base substrate; 120, light source layer; 130, pixel layer; 131, black matrix; 132, electrolyte solution; 140, pixel part; 141, light adjustment layer; 142, color filter part; 143, electroexpansion part; 144, first electrode; 145, second electrode; 146, third electrode; 147, fourth electrode; 148, fifth electrode; 149, sixth electrode; 150, encapsulation layer; 160, driving layer; 200, display device; 210, driving circuit. DETAILED DESCRIPTION

[0024] 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. However, the present application can be implemented in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0025] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of such features; "multiple" means two or more. In addition, terms indicating orientation or positional relationships such as "upper", "lower", "left", "right", "vertical", and "horizontal" are based on the orientation or relative positional relationships shown in the accompanying drawings and are only for the convenience of describing a simplified description of this 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 this application. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0026] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0027] Example 1:

[0028] Figure 1 is a schematic diagram of a display panel according to the first embodiment of the present application, see Figure 1 As shown, the present application discloses a display panel 100, which includes a base substrate 110, a light source layer 120, a pixel layer 130 and an encapsulation layer 150, wherein the light source layer 120 is arranged on the base substrate 110; the pixel layer 130 is arranged on the light source layer 120, and the light emitted by the light source layer 120 is emitted from the pixel layer 130; the encapsulation layer 150 is arranged on the pixel layer 130; wherein, the pixel layer 130 includes a black matrix 131 and a plurality of pixel portions 140, and two adjacent pixel portions 140 are separated by the black matrix 131, and the pixel portion 140 includes a light adjustment layer 141, and the light adjustment layer 141 is formed of an electric field-sensitive hydrogel material, and the transmittance of the electric field-sensitive hydrogel material is adjustable between 0% and 90%.

[0029] The present application realizes the adjustment of the display grayscale by providing an independently controllable light adjustment layer 141 in each pixel portion 140. Compared with the liquid crystal display panel 100, each light adjustment layer 141 can be independently packaged corresponding to each pixel to meet the requirements of deformation and folding in the flexible display panel 100. The folding and bending of the independently packaged light adjustment layer 141 does not affect the normal display effect. Moreover, the light adjustment layer 141 is formed of an electric field sensitive hydrogel material, and the transmittance of the light adjustment layer 141 can be controlled by an electric field to achieve different light transmittances at different positions to display different images. The electric field sensitive hydrogel material has good bending performance and has good deformation ability in the flexible display panel 100.

[0030] The present application utilizes a light-adjusting layer 141 made of an electric field-sensitive hydrogel material to adjust the grayscale of the display, controlling the light transmittance of the light-adjusting layer 141 to adjust the brightness. For example, when the grayscale is low, the display brightness is low, and when the grayscale is high, the display brightness is high.

[0031] It is worth mentioning that the display panel 100 of the present application can be a wearable display panel 100. Of course, the solution of the present application can also be applied to display panels 100 of other types of use, and this is not further limited. However, for the wearable display panel 100, a high refresh rate and a high response time are not required. Therefore, the light adjustment layer 141 in this embodiment can completely replace the liquid crystal, and can achieve traditional monochrome display or multi-color display. The transmittance is changed by the electric field-sensitive hydrogel material to achieve different display effects. Relatively speaking, the biggest advantage of the electric field-sensitive hydrogel material is its good deformation ability.

[0032] The wearable display panel 100 can be used in blood glucose meters and medical monitoring equipment. In this type of display panel 100, it only needs to have simple display functions and some special color rendering requirements. For example, a monochrome or dual-color display can be used. For example, normal information is displayed by green pixels, and urgent information is displayed by red pixels. In this case, only red display screen and green display screen are required. Therefore, when designing the display panel 100, only two colors of pixels need to be set. Compared with traditional display panels 100, such as liquid crystal display panels 100, liquid crystal boxes are required to achieve deflection, so flexible display cannot be achieved. The cost of organic light-emitting display panels 100 is high and the environmental stability is poor. For electronic paper display panels 100, it needs to rely on ambient light and is not applicable. The display panel 100 in this embodiment has the characteristics of flexibility, low cost and high environmental stability.

[0033] Specifically, the pixel portion 140 further includes a color filter portion 142, which includes one or more of a red filter portion, a green filter portion, or a blue filter portion. The color filter portion 142 is disposed on the light adjustment layer 141. For example, in the aforementioned monochrome display panel 100, only a single color color filter portion 142 is required, which can be one of the red, green, or blue filter portions. For example, in the aforementioned dual-color display panel 100, the color filter portion 142 can be two of the red, green, or blue filter portions.

[0034] In this embodiment, the main function of the light adjustment layer 141 is to adjust the grayscale of the display by adjusting the transmittance of light to achieve different image displays. By disposing the color filter portion 142 on the light adjustment layer 141, the light brightness is adjusted by the light adjustment layer 141 and then emitted from the color filter portion 142, thereby achieving color display.

[0035] Specifically, the light adjustment layer 141 is formed of an electric field-sensitive hydrogel material. Among them, the hydrogel material is synthesized by monomers or polymers by forming a water-permeable cross-linked network. The monomers are polymerized to form polymers, and then an interpenetrating polymer network (IPN) is formed through a gelation process (cross-linking method). The hydrogel material can retain a large amount of water and maintain a three-dimensional network structure. The cross-linking of the cohesive 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 with elasticity.

[0036] Polymer hydrogel materials can be defined as cross-linked polymers that can swell in water and retain large amounts of water without being dissolved. The forces that induce phase transitions in polymers can be summarized into four categories: hydrophobic interactions, hydrophilic interactions (including hydrogen bonds and water solvation), van der Waals forces, and electrostatic interactions between ions. As the external environment changes, these four forces compete with each other, causing conformational changes in the polymer segments in solution, ultimately leading to phase transitions. Under stimulation from external physical and chemical factors such as temperature, acidic or alkaline solutions, light, electricity, magnetism, sound, force, and chemicals, some polymer hydrogels can undergo reversible changes in volume and shape. These hydrogels that are responsive to environmental changes are called smart hydrogels. Among various external stimulation conditions, electrically responsive hydrogels have significant advantages over other types of smart hydrogels because electric fields are easily applied and controlled. Electric field-sensitive hydrogels are generally composed of polyelectrolytes. When placed in an electrolyte solution 132, these hydrogels undergo volume or shape changes under electric field stimulation, achieving the conversion of electrical energy into mechanical energy. The phase transition caused by the change in gel volume or shape causes the light transmittance of the hydrogel material to change.

[0037] Most electric-field-sensitive hydrogels contain chemically bonded ionized groups within their polymer networks. Therefore, these gels are often prepared by chemically or physically crosslinking synthetic or natural polymers with ionic groups. However, hydrogels derived from a single polymer often have poor mechanical properties. Therefore, copolymerization or blending methods are often used to prepare electric-field-sensitive hydrogels with a certain mechanical strength. For example, using synthetic polymers as raw materials, electric-field-sensitive hydrogels with various properties can be prepared by mixing inductive and photosensitive materials within the polymers through copolymerization, blending, or polymer interpenetration. These hydrogels exhibit electric-field sensitivity and undergo corresponding phase transitions under the influence of an electric field, resulting in changes in appearance. The photosensitive components within these hydrogels alter the light transmittance associated with these changes in appearance, with transmittance varying between 0 and 90%.

[0038] Specifically, the electric-field-sensitive hydrogel material exhibits different changes in light transmittance under different voltages. When voltage is applied, the light transmittance of the electric-field-sensitive hydrogel material increases, and when the voltage is removed, the light transmittance of the electric-field-sensitive hydrogel material decreases. Within a certain range, the higher the voltage, the higher the light transmittance of the electric-field-sensitive hydrogel material. The electric-field-sensitive hydrogel material in this embodiment can achieve displays with 16 grayscales, 32 grayscales, 64 grayscales, and more.

[0039] Specifically, the pixel portion 140 also includes a first electrode 144 and a second electrode 145. The first electrode 144 is arranged on a side of the light adjustment layer 141 away from the color filter portion 142, and the second electrode 145 is arranged on a side of the color filter portion 142 away from the light adjustment layer 141. The first electrode 144 and the second electrode 145 are used to control the transmittance of the light adjustment layer 141.

[0040] In this embodiment, the first electrode 144 and the second electrode 145 are transparent electrodes disposed on either side of the light-adjusting layer 141. By controlling the electric field of the first and second electrodes 144, 145, the light transmittance of the light-adjusting layer 141 can be varied between 0% and 90%. Of course, for some display panels 100 that only require two grayscale displays, bright and dark, multiple first electrodes 144 or multiple second electrodes 145 can be connected together to form a single first electrode 144 or second electrode 145. Light transmission through the color filter 142 can then be controlled by driving the second electrode 145 or first electrode 144 on the other side. When a subpixel of the display panel 100 requires grayscale 0, the electric field of the first and second electrodes 144, 145 is controlled to zero, resulting in a light transmittance of 0% for the light-adjusting layer 141. At this point, light from the light source cannot pass through the light-adjusting layer 141, and the subpixel is not displayed. When a sub-pixel of the display panel 100 is at grayscale 1, the first electrode 144 and the second electrode 145 are energized to form an electric field, causing the light transmittance of the light adjustment layer 141 to be at its highest, or to be at a value between 0% and 90%. At this point, the sub-pixel is displayed. Of course, for the aforementioned 16 grayscale, 32 grayscale, and 64 grayscale displays, the voltage drive needs to be set based on the relationship between the light transmittance of the light adjustment layer 141. For example, for 16 grayscale, 0% to 90% is divided into 16 grayscales, and 16 drive voltages are also set to achieve different grayscale displays.

[0041] The advantage of this embodiment is that the adjustment of the display grayscale is achieved by providing an independently controllable light adjustment layer 141 , which has the characteristics of flexibility, low cost, and high environmental stability.

[0042] Example 2:

[0043] Generally speaking, the opening area of ​​each pixel in the display panel 100 does not change after design and molding. In this embodiment, by designing the electroexpandable portion 143 and utilizing the expansion and deformation capability of the electroexpandable portion 143, the opening area of ​​each pixel in the display panel 100 can be changed.

[0044] Figure 2 is a schematic diagram of a display panel according to a second embodiment of the present application, Figure 3 is a schematic diagram of the electroexpansion portion of the pixel portion of the present application, Figure 4 is a display diagram of a display panel according to the second embodiment of the present application, see Figures 2 to 4As shown, the present application also discloses a display panel 100. Based on the above embodiment, the pixel portion 140 further includes an electroexpandable portion 143, which is arranged around the color filter portion 142. The electroexpandable portion 143 is configured to expand or contract under the action of an electric field; the color filter portion 142 is formed by doping a hydrogel material with a polymer color resist material; and in a direction perpendicular to the light output direction, the color filter portion 142 can be deformed under the action of the electroexpandable portion 143 to change the projected area of ​​the color filter portion 142 on the base substrate 110.

[0045] This embodiment is applied to a dual-color display panel 100, for example, a dual-color display panel 100 that uses red and green sub-pixels for display. The color filter portion 142 includes a red filter portion and a green filter portion, which are arranged alternately. The red filter portion corresponds to the red sub-pixel, and the green filter portion corresponds to the green sub-pixel.

[0046] When the display panel 100 needs to use some green sub-pixels to display some information, the light-transmitting area of ​​the green filter corresponding to the green sub-pixel can be adjusted to increase the area of ​​the green sub-pixel to be displayed. When using the enlarged green sub-pixel to display information, on the one hand, the information is clearer, and the larger sub-pixel area makes the displayed information more obvious and eye-catching. On the other hand, when the green sub-pixel is needed for display, since the red sub-pixel is not used for display, the area of ​​the red sub-pixel can be reduced. The enlarged green sub-pixel improves the display effect of the dual-color display panel 100 when performing monochrome display. Similarly, when the red sub-pixel is needed for display, the display effect of the red sub-pixel can also be enhanced. The display panel 100 of this embodiment can also perform dual-color or multi-color display.

[0047] It should be understood that the projected area of ​​the color filter 142 on the substrate 110 generally refers to the orthographic projection area on the substrate 110, which is also the effective light-transmitting area of ​​the color filter 142. Considering that the dual-color display panel 100 displays different monochrome patterns in different situations, for example, when a blood glucose meter displays blood glucose levels, if a green reading is required when the blood glucose level is low, the light transmittance of the red filter's light-adjusting layer 141 can be set to 0%, and red is not displayed. When a red reading is required when the blood glucose level is high, the light transmittance of the green filter's light-adjusting layer 141 can be set to 0%, and green is not displayed. During the aforementioned red and green monochrome display process, by adjusting the effective light-transmitting areas of the red and green filters, the red and green sub-pixel areas in the monochrome display are increased, resulting in a better display effect.

[0048] In this embodiment, the light-adjusting layer 141 can be configured to have only two states: a light-transmitting state and a light-opaque state. By adjusting the dopant content of the electric-field-sensitive hydrogel material in the light-adjusting layer 141, the light-adjusting layer 141 can have a high light transmittance when an electric field is applied, and a low light transmittance, even 0%, when no electric field is applied. This allows the green filter portion to absorb light during red monochrome display, even if light is emitted.

[0049] The color filter 142 is formed using a hydrogel material doped with a polymer color-resist material. Polymer color-resist materials are a class of polymers with specific optical properties that can be used to adjust, block, or alter the propagation path and color of light. By adjusting the composition and structure of the material, selective absorption or transmission of light of different wavelengths can be achieved. Specifically, the color filter 142 can be fabricated by adding the appropriate color-resist coating and adhesive to an alginate or polyethylene hydrogel base material.

[0050] Continue to see Figure 3 As shown, when the electroexpandable portion 143 expands under the action of an electric field, the projected area of ​​the color filter 142 on the substrate 110 decreases. When the electroexpandable portion 143 contracts under the action of an electric field, the projected area of ​​the color filter 142 on the substrate 110 increases. The color filter 142 has a certain degree of deformability. During the expansion and compression of the electroexpandable portion 143, the color filter 142 is squeezed and deformed, causing the projected area of ​​the color filter 142 on the substrate 110 to decrease. During the contraction of the electroexpandable portion 143, the color filter 142 expands, causing the projected area of ​​the color filter 142 on the substrate 110 to increase. The expansion and contraction of the electroexpandable portion 143 enables the color filter 142's effective light transmission area to be controlled.

[0051] Specifically, the electroexpandable portion 143 is deformed mainly by current or voltage, and the deformation includes contraction or expansion. During the expansion or contraction process of the electroexpandable portion 143 , the color filter portion 142 is squeezed or expanded, causing it to undergo passive deformation, thereby reducing or increasing the filtering area of ​​the color filter portion 142.

[0052] When the electroexpandable portion 143 contracts to its minimum contraction under the action of an electric field, the projected area of ​​the color filter 142 on the substrate 110 reaches its maximum area. As projected onto the substrate 110, the projection of the color filter 142 does not overlap with the projection of the black matrix 131. In other words, the maximum width of the color filter 142 is less than or equal to the width of the light-regulating layer 141, and the electroexpandable portion 143 partially overlaps with the light-regulating layer 141. Generally speaking, when the color filter 142 is at its maximum area, the projection of the color filter 142 on the substrate 110 completely overlaps with the projection of the light-regulating layer 141 on the substrate 110. Conversely, the projection of the black matrix 131 on the substrate 110 does not overlap with the projection of the light-regulating layer 141 on the substrate 110.

[0053] Specifically, the electroexpandable portion 143 is formed of an electric field-sensitive hydrogel material, which is opaque. The electric field-sensitive hydrogel material used in the electroexpandable portion 143 of the present application contains black light-blocking particles, thereby rendering the electroexpandable portion 143 opaque. Furthermore, even when a phase change occurs within the electroexpandable portion 143 under the influence of an electric field, the black light-blocking particles still block light. Of course, some black light-blocking particles can also be added to enhance the light-blocking capability of the electroexpandable portion 143. As the electric field-sensitive hydrogel material described above deforms under the influence of an electric field, this deformation is utilized in this embodiment to control the expansion and contraction of the electroexpandable portion 143 via an electric field.

[0054] Specifically, the pixel portion 140 further includes a third electrode 146 and a fourth electrode 147. The third electrode 146 is disposed on one side of the electroexpandable portion 143, and the fourth electrode 147 is disposed on the other side of the electroexpandable portion 143. The third electrode 146 and the fourth electrode 147 are used to control the expansion and contraction of the electroexpandable portion 143.

[0055] Under the action of the third electrode 146 and the fourth electrode 147, the electroexpandable portion 143 of the present application contracts or expands parallel to the third and fourth electrodes 146, 147, and also contracts or expands perpendicular to the third and fourth electrodes 146, 147. This application primarily utilizes the contraction or expansion parallel to the third and fourth electrodes 146, 147 to change the effective light-transmitting area of ​​the color filter portion 142. The display panel 100 of this embodiment can also perform dual-color or multi-color display, and the electroexpandable portion 143 can choose to expand or contract according to actual conditions.

[0056] Figure 5is a schematic diagram of another display panel according to the second embodiment of the present application, see Figure 5 As shown, of course, in another embodiment, the first electrode 144 and the third electrode 146 can also be combined into the same electrode. Specifically, the pixel portion 140 further includes a fifth electrode 148 and a sixth electrode 149. The fifth electrode 148 is arranged on a side of the electroexpandable portion 143 away from the light adjustment layer 141, and the sixth electrode 149 is arranged on the other side of the light adjustment layer 141 away from the electroexpandable portion 143. Under the orthographic projection of the base substrate 110, the fifth electrode 148 and the sixth electrode 149 are arranged to overlap with each other. The electroexpandable portion 143 and the light adjustment layer 141 are respectively within the projection range of the fifth electrode 148. The fifth electrode 148 and the sixth electrode 149 simultaneously control the electroexpandable portion 143 and the light adjustment layer 141.

[0057] Taking the dual-color display panel 100 as an example, when an electric field exists between the fifth electrode 148 and the sixth electrode 149, the light transmittance of the light-adjusting layer 141 between the fifth and sixth electrodes 148, 149 is high. At this time, the electroexpandable portion 143 contracts, causing the current color filter portion 142 to display monochrome images. When the electric field between the fifth and sixth electrodes 148, 149 is removed, the light transmittance of the light-adjusting layer 141 is low, and no display is performed. The electroexpandable portion 143 expands, causing the color filter portion 142 to contract, reducing the area of ​​the sub-pixels that are not displayed.

[0058] Specifically, a pixel driving layer for driving the above-mentioned click is provided between the pixel layer 130 and the light source layer 120. The base substrate 110 can be a flexible substrate, and the light source layer 120 can be provided with a plurality of light source arrays on the flexible substrate, or a light bar can be placed on the side to form a side-entry light source to provide light for the display panel 100. The pixel layer 130 is located on the pixel driving layer, and is mainly composed of a black matrix 131 and a plurality of packaging cavities. The packaging cavity is a flexible package made of a high molecular polyethylene material. A pixel portion 140 is provided in the packaging cavity, and each pixel portion 140 is encapsulated by a packaging cavity. In order to achieve better light effects and expansion effects, an electrolyte solution 132 can also be formed in the packaging cavity, and a light adjustment layer 141, a color filter portion 142, an electroexpansion layer and the above-mentioned electrodes are formed in the solution. The packaging cavities are covered with a black matrix 131. The black matrix 131 is above the packaging cavity and is 5 to 10 μm larger than the edge of the packaging cavity to ensure that it does not affect the maximum light transmission area. An overall encapsulation layer 150 is placed above the black matrix 131. A polarizer or COE structure is placed above the encapsulation layer 150 to prevent the influence of ambient light. This layer can be omitted if visual effects are not a concern in actual use. After a protective layer is placed on top, the overall display structure is complete.

[0059] It is worth mentioning that a driving layer 160 can be set between the light source layer 120 and the pixel layer 130. The driving layer 160 is used to provide driving voltages to the above-mentioned first electrode 144, second electrode 145, third electrode 146, fourth electrode 147, fifth electrode 148 and sixth electrode 149 respectively, so as to realize the control of the above-mentioned light adjustment layer 141 and electroexpansion part 143.

[0060] Figure 6 is a schematic diagram of the display device of this application, see Figure 6 The present application further discloses a display device, wherein the display device 200 includes a driving circuit 210 and the display panel 100 in any of the above embodiments. The driving circuit 210 is used to drive the display panel 100 to display.

[0061] It should be noted that the inventive concept of this 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 various embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the various embodiments or technical features are combined, the original technical effects will be enhanced.

[0062] The above content is a further detailed description of the present application in conjunction with specific optional implementation methods, and the specific implementation of the present application cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, they can make several simple deductions or substitutions without departing from the concept of the present application, which should be considered to fall within the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A light source layer is provided on the base substrate; as well as a pixel layer, disposed on the light source layer, wherein the light emitted by the light source layer is emitted from the pixel layer; an encapsulation layer, disposed on the pixel layer; The pixel layer includes a black matrix and a plurality of pixel portions, wherein two adjacent pixel portions are separated by the black matrix, and the pixel portions include a light adjustment layer, wherein the light adjustment layer is formed of an electric field-sensitive hydrogel material, and the light transmittance of the electric field-sensitive hydrogel material is adjustable between 0% and 90%; The pixel portion further includes a color filter portion, wherein the width of the color filter portion is less than or equal to the width of the light adjustment layer, and the color filter portion includes one or more of a red filter portion, a green filter portion, or a blue filter portion; and the color filter portion is disposed on the light adjustment layer; The color filter portion is formed by doping a hydrogel material with a polymer color resist material; the pixel portion further includes an electroexpandable portion, which is disposed around the color filter portion and is configured to expand or contract under the action of an electric field; the color filter portion can be deformed perpendicular to the light emitting direction under the action of the electroexpandable portion to change the projected area of ​​the color filter portion on the substrate; The pixel portion further includes a fifth electrode and a sixth electrode. The fifth electrode is arranged on a side of the electroexpansive portion away from the light adjustment layer, and the sixth electrode is arranged on the other side of the light adjustment layer away from the electroexpansive portion. Under the orthographic projection of the base substrate, the fifth electrode and the sixth electrode are arranged to overlap, and the electroexpansive portion and the light adjustment layer are respectively within the projection range of the fifth electrode. The fifth electrode and the sixth electrode simultaneously control the electroexpansive portion and the light adjustment layer.

2. The display panel according to claim 1, wherein: When the electroexpandable portion expands under the action of the electric field, the projection area of ​​the color filter portion on the base substrate shrinks; When the electroexpandable portion contracts under the action of the electric field, the projected area of ​​the color filter portion on the base substrate increases; When the electroexpandable portion contracts to a minimum contraction state under the action of an electric field, the projection area of ​​the color filter portion on the base substrate is at a maximum area state, and under the projection of the base substrate, the projection of the color filter portion does not overlap with the projection of the black matrix.

3. The display panel according to claim 2, wherein: The electrically expandable portion is formed of an electric field sensitive hydrogel material and is opaque.

4. The display panel according to claim 2, wherein: The maximum width of the color filter portion is smaller than or equal to the width of the light adjustment layer, and the electroexpandable portion partially overlaps with the light adjustment layer.

5. A display device, characterized in that: The device comprises a driving circuit and the display panel according to any one of claims 1 to 4, wherein the driving circuit is used to drive the display panel to display.

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