Display panel and display device

Abstract

The utility model relates to a display panel and a display device.The display panel comprises a first transparent substrate, a first control electrode, a cholesteric liquid crystal layer, a second control electrode, a color resistance layer and a second transparent substrate which are sequentially arranged in a stacked mode, a black substrate is arranged on one side, far away from the first control electrode, of the first transparent substrate; or the cholesteric liquid crystal layer comprises cholesteric liquid crystal and black dye, and a reflecting layer is arranged on the side, away from the first control electrode, of the first transparent substrate. According to the display panel, full-color display of the display panel is achieved through matching of the single-layer cholesteric liquid crystal box, the black substrate or the reflector plate and the RGB color resistance blocks, the overall thickness of the full-color display panel is reduced, and the structural stability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display panel, and particularly relates to a display panel and a display device. BACKGROUND

[0002] To realize rich gray scale and full-color display of various colors, the cholesteric liquid crystal technology usually adopts double-box or three-box superposition to realize color display, but this structure has some limitations. First, the multi-layer superposition leads to a thick whole display, poor specifications, increasing the volume and weight of the product. Secondly, the three-layer liquid crystal box structure makes the production process complex, high cost, which is not conducive to large-scale production and cost reduction. In addition, the complex structure may also lead to poor stability, affecting the reliability and life of the product.

[0003] Therefore, it is necessary to prepare a single-box cholesteric liquid crystal display device. SUMMARY

[0004] To solve the above problems, the present application provides a display panel and a display device.

[0005] To achieve the above object, the present application provides a display panel, comprising a first transparent substrate, a first control electrode, a cholesteric liquid crystal layer, a second control electrode, a color resistance layer and a second transparent substrate which are sequentially stacked.

[0006] The cholesteric liquid crystal layer comprises cholesteric liquid crystal, and the first transparent substrate is provided with a black substrate on the side away from the first control electrode; or

[0007] The cholesteric liquid crystal layer comprises cholesteric liquid crystal and black dye, and the first transparent substrate is provided with a reflective layer on the side away from the first control electrode.

[0008] As a further improvement of the present application, the black substrate is a black ink layer or a black film layer.

[0009] As a further improvement of the present application, the reflective layer is a metal reflective layer.

[0010] As a further improvement of the present application, the metal reflective layer is any one of an aluminum reflective layer, a silver reflective layer and a gold reflective layer.

[0011] As a further improvement of the present application, the first control electrode is a pixel electrode, and the second control electrode is a common electrode.

[0012] As a further improvement of the application, the first transparent substrate is provided with a plurality of scanning lines and a plurality of data lines, the plurality of scanning lines and the plurality of data lines are insulated and crossed with each other to define a plurality of pixel units, and the first transparent substrate is provided with a thin film transistor and the pixel electrode in each of the pixel units, the pixel electrode being electrically connected to the scanning line and the data line adjacent to the thin film transistor through the thin film transistor.

[0013] As a further improvement of the application, the pixel electrode corresponds to the pixel unit one by one, and the pixel electrode is a block electrode corresponding to the pixel unit.

[0014] As a further improvement of the application, the common electrode is a planar electrode covering the second transparent substrate.

[0015] As a further improvement of the application, the pitch of the cholesteric liquid crystal layer is matched with the refractive index of the liquid crystal to make the cholesteric liquid crystal layer reflect non-visible light. For example, the average refractive index of the cholesteric liquid crystal molecules in the cholesteric liquid crystal layer is 1.6, and the corresponding pitch of the cholesteric liquid crystal layer is less than 250 nm or greater than 500 nm.

[0016] As a further improvement of the application, the color resistance layer includes a plurality of first color resistance blocks, a plurality of second color resistance blocks, and a plurality of third color resistance blocks arranged in an array, the plurality of first color resistance blocks, the plurality of second color resistance blocks, and the plurality of third color resistance blocks are respectively located in a plurality of pixel units, the first color resistance block selectively transmits light of a first predetermined color, the second color resistance block selectively transmits light of a second predetermined color, and the third color resistance block selectively transmits light of a third predetermined color, the first predetermined color, the second predetermined color, and the third predetermined color are different colors, and the first predetermined color, the second predetermined color, and the third predetermined color are each selected from any one of red, blue, and green.

[0017] As a further improvement of the application, the first transparent substrate and the second transparent substrate can be made of, but are not limited to, glass, acrylic, polycarbonate, and the like. The first control electrode and the second control electrode can be made of, but are not limited to, indium tin oxide, indium zinc oxide, and the like.

[0018] As a further improvement of the application, a 1 / 4λ wave plate and a linear polarizer are sequentially arranged on the side of the second transparent substrate away from the color resistance layer.

[0019] To achieve the above-mentioned purpose, the application further provides a display device comprising the display panel.

[0020] The application has the beneficial effects that the application provides a display panel and a display device, full-color display is realized by the collocation of the single-layer cholesteric liquid crystal box and the RGB color resistance blocks, the overall thickness of the full-color display panel is reduced, and the structural stability is improved. The display panel with the structural design will inevitably simplify the production process and reduce the manufacturing cost. It is helpful to promote the application of cholesteric liquid crystal technology in a wider field, especially in occasions with requirements of lightness, low cost and high stability. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the switching principle between the P state, the focal conic state and the H state of the cholesteric liquid crystal.

[0022] Figure 2 It is a structural schematic diagram of the display panel of embodiment 1.

[0023] Figure 3 It is a schematic diagram of the reaction principle of the display panel of embodiment 1 showing a black screen.

[0024] Figure 4 It is a schematic diagram of the reaction principle of the display panel of embodiment 1 showing a white screen.

[0025] Figure 5 It is a structural schematic diagram of the display panel of embodiment 2.

[0026] Figure 6 It is a schematic diagram of the reaction principle of the display panel of embodiment 2 showing a black screen.

[0027] Figure 7 It is a schematic diagram of the reaction principle of the display panel of embodiment 2 showing a white screen.

[0028] Figure 8 It is a structural schematic diagram of the display panel of embodiment 3.

[0029] Figure 9 It is a schematic diagram of the reaction principle of the display panel of embodiment 3 showing a black screen.

[0030] Figure 10 It is a schematic diagram of the reaction principle of the display panel of embodiment 3 showing a black screen.

[0031] In the figure: 1, first transparent substrate; 2, first control electrode; 3, cholesteric liquid crystal layer; 4, second control electrode; 5, color resistance layer; 6, second transparent substrate; 7, black substrate; 8, reflective layer; 51, first color resistance block; 52, second color resistance block; 53, third color resistance block; 9, 1 / 4λ wave plate; 10, linear polarizer. DETAILED DESCRIPTION

[0032] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0033] The terms "first", "second", "third", "fourth" and the like in the description and claims of the present application, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the descriptive terms used in the present application are to be interpreted in the context as exercised by a person of ordinary skill in the art.

[0034] The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", and the like in the description and the claims of the present application, if any, are used for the orientation of the structure in the drawings and the relative position of the structures to each other, only to express the technical solution clearly and conveniently. It should be understood that the use of the terms should not limit the scope of the application claimed.

[0035] Noun term explanation:

[0036] Cholesteric Liquid Crystals (CLCs) are a kind of soft photonic crystal with periodic helical structure. This structure enables them to selectively reflect light of different wavelengths, thus producing different colors. Pitch is an important parameter describing the helical structure of cholesteric liquid crystals, which refers to the layer spacing of the director of the molecules rotating 360° along the helical axis. The pitch of cholesteric liquid crystals will change with the change of external conditions such as temperature and electric field, and this change will affect its optical properties, including the wavelength of reflected light. Figure 1 The switching principle of cholesteric liquid crystals between P state (planar texture state), FC state (focal conic state), and H state (field-induced nematic phase) is given. When the voltage exceeds a certain value, the cholesteric liquid crystal monomers will be perpendicular to the substrate along the electric field lines, and this state is unstable and will spontaneously return to the FC state. The state switching of cholesteric liquid crystals in Example 1-Example 2 is understood with reference to the schematic diagram of Figure 1 .

[0037] Example 1

[0038] Figure 2 The structure schematic diagram of the display panel of Example 1 is shown as Figure 2 , the present embodiment provides a display panel, comprising a first transparent substrate 1, a first control electrode 2, a cholesteric liquid crystal layer 3, a second control electrode 4, a color resistance layer 5, a second transparent substrate 6, which are sequentially stacked, a black matrix 7 is arranged on the side of the first transparent substrate 1 away from the first control electrode 2, the black matrix 7 can be preferably a black ink layer or a black film layer, the cholesteric liquid crystal layer 3 has a P state for transmitting incident light and a focal conic state for reflecting incident light.

[0039] In the embodiment, the cholesteric liquid crystal layer 3 comprises cholesteric liquid crystal, and the pitch of the cholesteric liquid crystal layer 3 is matched with the refractive index of the liquid crystal to make the cholesteric liquid crystal layer 3 reflect non-visible light. For example, when the average refractive index of the cholesteric liquid crystal molecules is 1.6, the corresponding pitch of the cholesteric liquid crystal layer is less than 250 nm or greater than 500 nm.

[0040] In the embodiment, the first control electrode 2 is a pixel electrode, and the second control electrode 4 is a common electrode. A plurality of scan lines and a plurality of data lines are arranged on the first transparent substrate, and the plurality of scan lines and the plurality of data lines are insulated and crossed to define a plurality of pixel units. The first transparent substrate is provided with a thin film transistor and the pixel electrode in each of the pixel units, and the pixel electrode is electrically connected to the scan line and the data line adjacent to the thin film transistor through the thin film transistor. The pixel electrode corresponds to the pixel unit one by one, wherein the pixel electrode is a block electrode corresponding to the pixel unit. The common electrode is a planar electrode covering the second transparent substrate 6.

[0041] In the embodiment, the color resistance layer 5 comprises a plurality of first color resistance blocks 51, a plurality of second color resistance blocks 52, and a plurality of third color resistance blocks 53 arranged in an array. The plurality of first color resistance blocks 51, the plurality of second color resistance blocks 52, and the plurality of third color resistance blocks 53 are respectively located in the plurality of pixel units. The first color resistance block 51 selectively transmits light of a first preset color, the second color resistance block 52 selectively transmits light of a second preset color, and the third color resistance block 53 selectively transmits light of a third preset color. The first preset color is blue, the second preset color is red, and the third preset color is green.

[0042] Figure 3 A schematic diagram of the reaction principle of the display panel of the embodiment 1 to present a black screen is shown in Figure 4 A schematic diagram of the reaction principle of the display panel of the embodiment 1 to present a white screen is shown in the figure. The reaction principle of the display panel of the embodiment is as follows:

[0043] When not powered, the cholesteric liquid crystal layer 3 presents an initial state P state, and the cholesteric liquid crystal layer 3 in the P state presents a transparent state. The incident ambient light is sequentially transmitted through the second transparent substrate 6, the color resistance layer 5, the second control electrode 4, the cholesteric liquid crystal layer 3, the first control electrode 2, and the first transparent substrate 1, and then absorbed by the black substrate 7. No light is reflected, and the display panel presents a black screen, as Figure 3 shown in the figure.

[0044] When the pulse voltage is applied to the first control electrode 2 and the second control electrode 4, the cholesteric liquid crystal layer 3 presents a focal conic state, the cholesteric liquid crystal layer 3 in the focal conic state presents a fog state, and the incident ambient light sequentially passes through the second transparent substrate 6, the color resistance layer 5, the second control electrode 4 and the cholesteric liquid crystal layer 3, is reflected by the cholesteric liquid crystal layer 3, the display panel area corresponding to the plurality of first color resistance blocks 51 reflects blue light, the display panel area corresponding to the plurality of second color resistance blocks 52 reflects red light, and the display panel area corresponding to the plurality of third color resistance blocks 53 reflects green light, and the display panel presents white color after red, green and blue three-color light modulation, as shown in Figure 4

[0045] When only the pulse voltage is applied to the electrode corresponding to the plurality of first color resistance blocks 51, the cholesteric liquid crystal layer 3 corresponding to the plurality of first color resistance blocks 51 presents a focal conic state, the cholesteric liquid crystal layer 3 corresponding to the plurality of second color resistance blocks 52 and the plurality of third color resistance blocks 53 presents a transparent state, and the ambient light incident on the display panel reflects blue light in the display panel area corresponding to the plurality of first color resistance blocks 51, and does not reflect light in the display panel area corresponding to the plurality of second color resistance blocks 52 and the plurality of third color resistance blocks 53, and presents black color, so that the display panel as a whole presents blue color.

[0046] When only the pulse voltage is applied to the electrode corresponding to the plurality of second color resistance blocks 52, the cholesteric liquid crystal layer 3 corresponding to the plurality of second color resistance blocks 52 presents a focal conic state, the cholesteric liquid crystal layer 3 corresponding to the plurality of first color resistance blocks 51 and the plurality of third color resistance blocks 53 presents a transparent state, and the ambient light incident on the display panel reflects red light in the display panel area corresponding to the plurality of second color resistance blocks 52, and does not reflect light in the display panel area corresponding to the plurality of first color resistance blocks 51 and the plurality of third color resistance blocks 53, and presents black color, so that the display panel as a whole presents red color.

[0047] When only the pulse voltage is applied to the electrode corresponding to the plurality of third color resistance blocks 53, the cholesteric liquid crystal layer 3 corresponding to the plurality of third color resistance blocks 53 presents a focal conic state, the cholesteric liquid crystal layer 3 corresponding to the plurality of first color resistance blocks 51 and the plurality of second color resistance blocks 52 presents a transparent state, and the ambient light incident on the display panel reflects green light in the display panel area corresponding to the plurality of third color resistance blocks 53, and does not reflect light in the display panel area corresponding to the plurality of first color resistance blocks 51 and the plurality of second color resistance blocks 52, and presents black color, so that the display panel as a whole presents green color.

[0048] The display panel provided in the application realizes full-color display by the P state and the focal conic state switching of the cholesteric liquid crystal technology, the cooperation of the single-layer cholesteric liquid crystal box and the RGB color resistance blocks, reduces the overall thickness of the full-color display panel, and improves the structural stability.

[0049] Embodiment 2

[0050] ​Figure 5 As shown in the structural schematic diagram of the display panel of Embodiment 2, the present embodiment provides a display panel, comprising a first transparent substrate 1, a first control electrode 2, a cholesteric liquid crystal layer 3, a second control electrode 4, a color resistance layer 5, a second transparent substrate 6 which are sequentially stacked, a reflective layer 8 is arranged on the side of the first transparent substrate 1 away from the first control electrode 2, the cholesteric liquid crystal layer 3 has a P state of absorbing incident light and a focal conic state of reflecting incident light. Figure 5

[0051] In the present embodiment, the cholesteric liquid crystal layer 3 comprises cholesteric liquid crystal and black dye. The pitch of the cholesteric liquid crystal layer 3 is matched with the refractive index of the liquid crystal to make the cholesteric liquid crystal layer 3 reflect non-visible light. For example, when the average refractive index of the cholesteric liquid crystal molecules is 1.6, the corresponding pitch of the cholesteric liquid crystal layer is less than 250 nm or greater than 500 nm. The black dye has the characteristics of long-axis absorption and weak short-axis absorption, and the black dye can absorb light in the visible light band.

[0052] In the present embodiment, the first control electrode 2 is a pixel electrode, and the pixel electrode is a plurality of pixel electrodes which are located in a plurality of pixel units. The second control electrode 4 is a common electrode, and the common electrode is an ITO electrode layer.

[0053] In the present embodiment, the color resistance layer 5 comprises a plurality of first color resistance blocks 51, a plurality of second color resistance blocks 52 and a plurality of third color resistance blocks 53 which are arranged in an array, the plurality of first color resistance blocks 51, the plurality of second color resistance blocks 52 and the plurality of third color resistance blocks 53 are respectively located in a plurality of pixel units, the first color resistance block 51 selectively transmits light of a first preset color, the second color resistance block 52 selectively transmits light of a second preset color, and the third color resistance block 53 selectively transmits light of a third preset color, the first preset color is blue, the second preset color is red, and the third preset color is green.

[0054] In the present embodiment, in order to further improve the reflectivity, the reflective layer 8 is a metal reflective layer, more preferably, the reflective layer 8 is any one of an aluminum reflective layer, a silver reflective layer and a gold reflective layer.

[0055] Figure 6 As shown in the reaction principle schematic diagram of the display panel of Embodiment 2 presenting a black screen, Figure 7 As shown in the reaction principle schematic diagram of the display panel of Embodiment 2 presenting a white screen, Figure 6 and Figure 7 As shown in the reaction principle schematic diagram of the display panel of Embodiment 2 presenting a black screen,

[0056] ​When not powered, the cholesteric liquid crystal layer 3 presents an initial state P state, the P state cholesteric liquid crystal layer 3 presents black, the incident ambient light is sequentially transmitted through the second transparent substrate 6, the color resistance layer 5, the second control electrode 4, the cholesteric liquid crystal layer 3, and is absorbed by the black dye, no light is reflected, and the display panel presents a black screen, as shown in Figure 6 .

[0057] When the pulse voltage is applied to the first control electrode 2 and the second control electrode 4 as a whole, the cholesteric liquid crystal layer 3 presents a focal conic state, the cholesteric liquid crystal layer 3 in the focal conic state presents a fog state, and the incident ambient light is sequentially transmitted through the second transparent substrate 6, the color resistance layer 5, the second control electrode 4, and the cholesteric liquid crystal layer 3, and is reflected by the cholesteric liquid crystal layer 3. At the same time, a small amount of light transmitted through the cholesteric liquid crystal layer 3 is reflected again by the reflection layer 8. The display panel region corresponding to the plurality of first color resistance blocks 51 reflects blue light, the display panel region corresponding to the plurality of second color resistance blocks 52 reflects red light, and the display panel region corresponding to the plurality of third color resistance blocks 53 reflects green light. After red, green and blue color light adjustment, the display panel presents white, as shown in Figure 7 .

[0058] When only the pulse voltage is applied to the electrode corresponding to the plurality of first color resistance blocks 51, the cholesteric liquid crystal layer 3 corresponding to the plurality of first color resistance blocks 51 presents a focal conic state, and the cholesteric liquid crystal layer 3 corresponding to the plurality of second color resistance blocks 52 and the plurality of third color resistance blocks 53 presents black. After the ambient light is incident on the display panel, the display panel region corresponding to the plurality of first color resistance blocks 51 reflects blue light, and the display panel regions corresponding to the plurality of second color resistance blocks 52 and the plurality of third color resistance blocks 53 do not reflect light, presenting black. Therefore, the display panel as a whole presents blue.

[0059] When only the pulse voltage is applied to the electrode corresponding to the plurality of second color resistance blocks 52, the cholesteric liquid crystal layer 3 corresponding to the plurality of second color resistance blocks 52 presents a focal conic state, and the cholesteric liquid crystal layer 3 corresponding to the plurality of first color resistance blocks 51 and the plurality of third color resistance blocks 53 presents black. After the ambient light is incident on the display panel, the display panel region corresponding to the plurality of second color resistance blocks 52 reflects red light, and the display panel regions corresponding to the plurality of first color resistance blocks 51 and the plurality of third color resistance blocks 53 do not reflect light, presenting black. Therefore, the display panel as a whole presents red.

[0060] When only the pulse voltage is applied to the electrode corresponding to the plurality of third color resistance blocks 53, the cholesteric liquid crystal layer 3 corresponding to the plurality of third color resistance blocks 53 presents a focal conic state, and the cholesteric liquid crystal layer 3 corresponding to the plurality of first color resistance blocks 51 and the plurality of second color resistance blocks 52 presents black. After the ambient light is incident on the display panel, the display panel region corresponding to the plurality of third color resistance blocks 53 reflects green light, and the display panel regions corresponding to the plurality of first color resistance blocks 51 and the plurality of second color resistance blocks 52 do not reflect light, presenting black. Therefore, the display panel as a whole presents green.

[0061] Example 3

[0062] Figure 8 This is a schematic diagram of the display panel structure in Embodiment 3, as shown below. Figure 8 As shown, the difference between this embodiment and embodiment 1 is that a 1 / 4λ wave plate 9 and a linear polarizer 10 are sequentially disposed on the side of the second transparent substrate 6 away from the color resist layer 5 to improve the contrast of the display panel.

[0063] Figure 9 This is a schematic diagram illustrating the reaction principle of the display panel in Example 3 displaying a black screen. Figure 10 This is a schematic diagram illustrating the reaction principle of the display panel displaying a black screen in Example 3, as shown below. Figure 9-10 As shown, the reaction principle of the display panel in this embodiment is as follows:

[0064] When the liquid crystal in the cholesteric liquid crystal layer 3 is a left-handed liquid crystal, the transmission axis of the linear polarizer 10 and the slow axis of the 1 / 4λ wave plate 9 are 45° counterclockwise, and the incident ambient light is formed by left-handed circular polarization after passing through the linear polarizer 10 and the 1 / 4λ wave plate 9.

[0065] When no power is applied, the cholesteric liquid crystal layer 3 is in its initial P-state. The P-state cholesteric liquid crystal layer 3 is transparent. Incident left-handed circularly polarized light passes sequentially through the second transparent substrate 6, the color resist layer 5, the second control electrode 4, the cholesteric liquid crystal layer 3, the first control electrode 2, and the first transparent substrate 1, and is absorbed by the black substrate 7. There is no light reflection, and the display panel appears black. Figure 9 As shown, Figure 9 The explanation uses the blue color block as an example. The red and green color blocks are similar, and will not be illustrated here.

[0066] When a pulse voltage is applied to the first control electrode 2 and the second control electrode 4, the cholesteric liquid crystal layer 3 exhibits a focal conical state. The focal conical cholesteric liquid crystal layer 3 then appears hazy. Incident left-handed circularly polarized light passes sequentially through the second transparent substrate 6, the color resist layer 5, the second control electrode 4, and the cholesteric liquid crystal layer 3, and is reflected by the cholesteric liquid crystal layer 3. The display panel area corresponding to the multiple first color resist blocks 51 reflects blue light, the display panel area corresponding to the multiple second color resist blocks 52 reflects red light, and the display panel area corresponding to the multiple third color resist blocks 53 reflects green light. After red, green, and blue color mixing, the display panel appears white, as shown in the image. Figure 10 As shown, Figure 10 The explanation uses the blue color block as an example. The red and green color blocks are similar, and will not be illustrated here.

[0067] When only the pulse voltage is applied to the electrodes corresponding to the plurality of first color resist blocks 51, the cholesteric liquid crystal layer 3 corresponding to the plurality of first color resist blocks 51 assumes a focal conic state, the cholesteric liquid crystal layer 3 corresponding to the plurality of second color resist blocks 52 and the plurality of third color resist blocks 53 assumes a transparent state, the incident left-handed circularly polarized light passes through the display panel, the display panel region corresponding to the plurality of first color resist blocks 51 reflects blue light, and the display panel regions corresponding to the plurality of second color resist blocks 52 and the plurality of third color resist blocks 53 do not reflect light, thus appearing black. Therefore, the display panel as a whole appears blue.

[0068] When only the pulse voltage is applied to the electrodes corresponding to the plurality of second color resist blocks 52, the cholesteric liquid crystal layer 3 corresponding to the plurality of second color resist blocks 52 assumes a focal conic state, the cholesteric liquid crystal layer 3 corresponding to the plurality of first color resist blocks 51 and the plurality of third color resist blocks 53 assumes a transparent state, the incident left-handed circularly polarized light passes through the display panel, the display panel region corresponding to the plurality of second color resist blocks 52 reflects red light, and the display panel regions corresponding to the plurality of first color resist blocks 51 and the plurality of third color resist blocks 53 do not reflect light, thus appearing black. Therefore, the display panel as a whole appears red.

[0069] When only the pulse voltage is applied to the electrodes corresponding to the plurality of third color resist blocks 53, the cholesteric liquid crystal layer 3 corresponding to the plurality of third color resist blocks 53 assumes a focal conic state, the cholesteric liquid crystal layer 3 corresponding to the plurality of first color resist blocks 51 and the plurality of second color resist blocks 52 assumes a transparent state, the incident left-handed circularly polarized light passes through the display panel, the display panel region corresponding to the plurality of third color resist blocks 53 reflects green light, and the display panel regions corresponding to the plurality of first color resist blocks 51 and the plurality of second color resist blocks 52 do not reflect light, thus appearing black. Therefore, the display panel as a whole appears green.

[0070] The application also provides a display device comprising the display panel according to any one of the above embodiments.

[0071] The display panel and the display device provided by the application realize full-color display through the combination of the single-layer cholesteric liquid crystal cell and the RGB color resist blocks, reduce the overall thickness of the full-color display panel, and improve the structural stability. The display panel with the structural design can simplify the production process and reduce the manufacturing cost. The application is helpful to promote the application of the cholesteric liquid crystal technology in a wider field, especially in occasions with requirements for lightness, thinness, low cost and high stability.

[0072] The above detailed description is only a specific description of the feasible embodiments of the application, and is not intended to limit the protection scope of the application. Any equivalent embodiments or changes made without departing from the spirit of the application shall be included in the protection scope of the application.

Claims

1. A display panel, characterized in that, The substrate comprises a first transparent substrate, a first control electrode, a cholesteric liquid crystal layer, a second control electrode, a color resist layer, and a second transparent substrate, which are stacked sequentially, wherein: The cholesteric liquid crystal layer comprises cholesteric liquid crystal, and a black substrate is disposed on the side of the first transparent substrate away from the first control electrode; or The cholesteric liquid crystal layer comprises cholesteric liquid crystal and black dye, and a reflective layer is disposed on the side of the first transparent substrate away from the first control electrode.

2. The display panel according to claim 1, characterized in that, The black substrate is a black ink layer or a black film layer.

3. The display panel according to claim 1, characterized in that, The reflective layer is a metallic reflective layer.

4. The display panel according to claim 1, characterized in that, The first control electrode is a pixel electrode, and the second control electrode is a common electrode.

5. The display panel according to claim 4, characterized in that, The first transparent substrate has multiple scan lines and multiple data lines. The multiple scan lines and multiple data lines are mutually insulated and intersect to form multiple pixel units. The first transparent substrate has a thin film transistor and a pixel electrode in each pixel unit. The pixel electrode is electrically connected to the scan lines and data lines adjacent to the thin film transistor through the thin film transistor.

6. The display panel according to claim 5, characterized in that, Each pixel electrode corresponds to a pixel unit, and each pixel electrode is a block electrode corresponding to a pixel unit.

7. The display panel according to claim 5, characterized in that, The common electrode is a planar electrode that covers the entire surface of the second transparent substrate.

8. The display panel according to claim 1, characterized in that, The color resist layer includes multiple first color resist blocks, multiple second color resist blocks, and multiple third color resist blocks arranged in an array. The multiple first color resist blocks, multiple second color resist blocks, and multiple third color resist blocks are respectively located in multiple pixel units. The first color resist blocks selectively transmit light of a first preset color, the second color resist blocks selectively transmit light of a second preset color, and the third color resist blocks selectively transmit light of a third preset color. The first preset color, the second preset color, and the third preset color are each different colors, and the first preset color, the second preset color, and the third preset color are each selected from any one of red, blue, and green.

9. The display panel according to claim 1, characterized in that, A 1 / 4λ wave plate and a linear polarizer are sequentially disposed on the side of the second transparent substrate away from the color resist layer.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1-9.

Images