Display panel and display device

Abstract

The present invention discloses a display panel and a display device, wherein the display panel includes a substrate and a color filter. The color filter includes a light shielding layer, a color resist layer and a thermochromic layer. The light shielding layer includes a light shielding portion, and an opening is provided between two adjacent light shielding portions. The color resist layer includes a plurality of color resists, and the color resists are located in the opening. The plurality of color resists include a first color resist, a second color resist and a third color resist. The thermochromic layer and the first color resist are arranged in the same opening. The thermochromic layer is configured to absorb heat in the display panel and emit light of a first color. The present invention utilizes the light emitting principle in the thermochromic layer. Under the premise of ensuring that the color resist design is unchanged, the purpose of controllably adjusting the color point of the display panel can be achieved, which is beneficial to reducing the temperature and power consumption of the display panel.

Description

Technical Field

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

[0002] White point is a very important parameter in display optics. It is used to define the standard color temperature of a certain color gamut when displaying pure white. The drift of the module's white point will have a series of impacts on the final optical performance of the product, such as changes in power consumption and the perception of pure white images.

[0003] The color point of the panel generally depends on the opening of the color resist (including RGB color resist) in the color filter. The increase of the opening or the increase of the color resist light effect can cause the color point to shift. For example, the increase of the opening of the blue color resist B or the increase of the light effect of the blue color resist will cause the color point to shift to the blue. However, in some special cases, due to the design limitations of the panel, the panel color resist opening design is fixed and cannot be changed, which cannot meet the product's white point requirements. Summary of the invention

[0004] The embodiments of the present invention provide a liquid crystal display panel and a display device, which can solve the technical problem that the color resistance opening in the color filter of the existing display panel is fixed and cannot be changed, and the white point requirement of the product cannot be met.

[0005] An embodiment of the present invention provides a display panel, comprising a substrate and a color filter disposed on one side of the substrate, wherein the color filter comprises:

[0006] The light shielding layer comprises a plurality of light shielding parts arranged at intervals, and an opening is formed between two adjacent light shielding parts;

[0007] a color resist layer, comprising a plurality of color resists arranged at intervals, the color resists being located in the opening, the plurality of color resists comprising a first color resist having a first color, a second color resist having a second color, and a third color resist having a third color; and

[0008] The thermochromic layer is disposed in the same opening as the first color resist, and the thermochromic layer is configured to absorb heat in the display panel and emit light of the first color.

[0009] According to the display panel provided by the embodiment of the present invention, the thermochromic layer is arranged on a side of the first color resistor away from the substrate.

[0010] According to the display panel provided by the embodiment of the present invention, a surface of the thermochromic layer on a side away from the substrate is lower than a surface of the adjacent light shielding portion on a side away from the substrate.

[0011] According to the display panel provided by the embodiment of the present invention, the thermochromic layer includes a plurality of color-changing particles doped in the first color resist.

[0012] According to the display panel provided by the embodiment of the present invention, the mass fraction of the color-changing particles in the first color resist is 1%-5%.

[0013] According to the display panel provided by the embodiment of the present invention, the thickness of the thermochromic layer is greater than 0 micrometer and less than 1 micrometer.

[0014] According to the display panel provided by the embodiment of the present invention, the first color resist is a blue color resist, the second color resist is one of a red color resist and a green color resist, and the third color resist is the other of the red color resist and the green color resist.

[0015] According to the display panel provided by the embodiment of the present invention, the material of the thermochromic layer includes an organic thermochromic ternary compound composed of spiropyrans, bisphenols and alcohols.

[0016] According to the display panel provided by the embodiment of the present invention, the display panel is an organic light emitting display panel or a liquid crystal display panel.

[0017] An embodiment of the present invention provides a display device, comprising the above-mentioned display panel.

[0018] Beneficial effect: In the display panel and the display device provided by the present invention, a thermochromic layer is arranged in the same opening as the first color resist, and the thermochromic layer is configured to absorb heat in the display panel and emit light of a first color. By utilizing the luminescence principle of the thermochromic layer, while ensuring that the color resist design remains unchanged, the color point in the display panel can be adjusted to perform a first color shift, thereby achieving the purpose of controllably adjusting the color point of the display panel, thereby meeting the product's requirements for the white point; at the same time, the thermochromic layer can absorb heat in the display panel, which is beneficial to reducing the temperature and power consumption of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of a first structure of a display panel provided by an embodiment of the present invention;

[0021] Figure 2 A second structural schematic diagram of a display panel provided by an embodiment of the present invention;

[0022] Figure 3 A third structural schematic diagram of a display panel provided by an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the structure of a display device provided by an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 100. display panel; 200. backlight module;

[0026] 1. Substrate; 2. Color filter; 21. Shading layer; 211. Shading portion; 212. Opening; 22. Color resist layer; 221. First color resist; 222. Second color resist; 223. Third color resist; 23. Thermochromic layer; 231. Color-changing particles; 3. Array substrate; 4. Liquid crystal layer; 41. Liquid crystal molecules; 5. Drive array layer; 6. Sub-pixels; 7. Flat layer. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "upper", "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly stipulated and limited, a first feature being “on” or “below” a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them.

[0030] The embodiments of the present invention provide a display panel and a display device, which are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0031] See also Figure 1-Figure 3The embodiment of the present invention provides a display panel 100, which includes a substrate 1 and a color filter 2 disposed on one side of the substrate 1. The color filter 2 includes a light shielding layer 21, a color resist layer 22, and a thermochromic layer 23. The light shielding layer 21 includes a plurality of light shielding portions 211 disposed at intervals, and an opening 212 is provided between two adjacent light shielding portions 211. The color resist layer 22 includes a plurality of color resists disposed at intervals, and the color resists are located in the opening 212. The plurality of color resists include a first color resist 221 having a first color, a second color resist 222 having a second color, and a third color resist 223 having a third color. The thermochromic layer 23 and the first color resist 221 are disposed in the same opening 212, and the thermochromic layer 23 is configured to absorb heat in the display panel 100 and emit light of the first color.

[0032] The display panel 100 provided by the embodiment of the present invention is provided with a thermochromic layer 23 located in the same opening 212 as the first color resist 221. The thermochromic layer 23 is configured to absorb heat in the display panel 100 and emit light of a first color. By utilizing the light-emitting principle of the thermochromic layer 23, the color point in the display panel 100 can be adjusted to perform a first color shift while ensuring that the color resist design remains unchanged, thereby achieving the purpose of controllably adjusting the color point of the display panel 100, thereby meeting the product's requirements for the white point. At the same time, the thermochromic layer 23 can absorb heat in the display panel 100, which is beneficial to reducing the temperature and power consumption of the display panel 100.

[0033] Optionally, the material of the substrate 1 may be a hard material, such as glass, or a flexible material, such as polyimide (PI), which is not limited in the present invention.

[0034] Specifically, the light shielding layer 21 is used to absorb light to prevent light of different colors from causing crosstalk. Optionally, the material of the light shielding layer 21 includes a black color resist material. For example, the light shielding layer 21 is a black matrix (BM).

[0035] Specifically, the first color, the second color and the third color are one of red, green and blue and are different colors. Correspondingly, the first color resist 221, the second color resist 222 and the third color resist 223 are one of red, green and blue.

[0036] It should be noted that the material of the thermochromic layer 23 includes thermochromic materials, which are divided into inorganic thermochromic materials and organic thermochromic materials. Among them, inorganic thermochromic materials mainly include metal halides, metal complexes, metal ion compounds, metal oxides and doped metal oxides, such as HgI (hot-rolled galvanized) and VO2 (vanadium dioxide). The main color change mechanism is the change of crystal form and the change of ligand geometric configuration. Organic thermochromic materials mainly include the color change of salicylaldehyde shiff bases, spiropyran, spirooxazone compounds and multi-component composites. The color change mechanism is mainly the structural change within the molecule and the electron transfer between molecules.

[0037] It is understandable that the display panel 100 will emit a certain amount of heat to achieve luminous display, causing the temperature to rise. When the temperature of the display panel 100 rises to a certain temperature, generally 50°C-60°C, the thermochromic layer 23 absorbs heat. Under the excitation of heat, the thermochromic layer 23 will change color, thereby emitting light of a specific wavelength. Exemplarily, taking the material of the thermochromic layer 23 as an inorganic halide Cu2HgI4 (copper tetraiodine mercuric acid) and the first color resistance 221 as a blue color resistance as an example, when the thermochromic material absorbs heat, due to the transfer between charges (M→L→Mˋ), the absorption peak of the thermochromic material changes from colorless or light color to blue (as shown in the following formula), thereby emitting light of a specific wavelength. Under the condition of ensuring that the color resistance opening of the color filter 2 remains unchanged, by setting the thermochromic layer 23, the color point of the display panel 100 can be blue-shifted as a whole, thereby achieving the purpose of controllably adjusting the color point of the display panel 100, thereby meeting the product's demand for white point.

[0038] Cu2HgI4 (colorless or light color) → Cu2HgI4 (blue)

[0039] It should be noted that, in the present invention, the thermochromic layer 23 and the first color resist 221 are disposed in the same opening 212 , and there are various situations for the position of the thermochromic layer 23 . Various situations for the position of the thermochromic layer 23 will be described one by one below.

[0040] In one embodiment, if Figure 1 As shown, the thermochromic layer 23 is disposed on the side of the first color resist 221 away from the substrate 1. In this embodiment, the thermochromic layer 23 exists in the form of a film layer, and can be formed by spin coating or scraping. Specifically, after forming the first color resist 221, or after forming the entire color resist layer 22, a yellow light process is used to form the thermochromic layer 23 on the first color resist 221.

[0041] Specifically, the thickness of the thermochromic layer 23 should not be too large or too small. If the thickness is too large, the first sublayer will overflow the opening 212. If the thickness is too small, the color changing effect of the thermochromic layer 23 will be poor and cannot meet the requirements. In this embodiment, the surface of the thermochromic layer 23 away from the substrate 1 is lower than the surface of the adjacent light shielding portion 211 away from the substrate 1, so that the thermochromic layer 23 is located in the opening 212 without overflowing the corresponding opening 212.

[0042] Specifically, the thickness of the thermochromic layer 23 is greater than 0 micrometers and less than 1 micrometer. Optionally, the thickness of the thermochromic layer 23 is greater than 0.5 micrometers and less than 1 micrometer. For example, the thickness of the thermochromic layer 23 can be one of 0.5 micrometers, 0.55 micrometers, 0.6 micrometers, 0.65 micrometers, 0.7 micrometers, 0.75 micrometers, 0.8 micrometers, 0.85 micrometers, 0.9 micrometers, 0.95 micrometers and 1 micrometer.

[0043] In another embodiment, if Figure 2 As shown, Figure 2 and Figure 1 The difference is that the thermochromic layer 23 includes a plurality of color-changing particles 231 doped in the first color resist 221, and the color-changing particles 231 can absorb the heat in the display panel 100 and emit light of a specific wavelength. In this embodiment, the thermochromic layer 23 exists in the form of particles. Specifically, when preparing the first color resist 221, a thermochromic material can be added to the color resist material of the first color resist 221, and the thermochromic material can be mixed into the color resist material of the first color resist 221 by high-speed mechanical stirring, so that the thermochromic layer 23 and the first color resist 221 are prepared by the same process. Compared with Figure 1 , which is conducive to reducing the process and reducing costs.

[0044] Specifically, the color-changing particles 231 may be in the form of particles or microcapsules. Inorganic thermochromic materials generally exist in the form of particles. Organic thermochromic materials may be made into microcapsules by chemical methods. The shapes of the microcapsules may be spherical, granular, etc.

[0045] Specifically, the mass fraction of the color-changing particles 231 in the first color resist 221 is 1%-5%. Optionally, the mass fraction of the color-changing particles 231 in the first color resist 221 can be one of 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% and 5%.

[0046] Optionally, the material of the thermochromic layer 23 includes an organic thermochromic ternary compound composed of spiropyrans (such as bromoindoline spirobenzopyran), bisphenols and alcohols (ethers, ketones, etc.).

[0047] It should be noted that, in one embodiment, when the white point of the display device using the display panel 100 is seriously yellowish, the display panel 100 should be blue-shifted to adjust the color point of the display panel 100 so that the white point of the display panel 100 meets the requirements. In this case, the first color resist 221 is a blue color resist, the second color resist 222 is one of a red color resist and a green color resist, the third color resist 223 is the other of the red color resist and the green color resist, and the thermochromic layer 23 absorbs heat to emit blue light, so that the display panel 100 is blue-shifted.

[0048] In other embodiments, when the white point of the display device using the display panel 100 is seriously pink, the display panel 100 should be green-shifted to adjust the color point of the display panel 100 so that the white point of the display panel 100 meets the requirements. In this case, the first color resist 221 is a green color resist, the second color resist 222 is one of a blue color resist and a red color resist, the third color resist 223 is the other of the blue color resist and the red color resist, and the thermochromic layer 23 absorbs heat to emit green light, so that the display panel 100 undergoes a green shift.

[0049] In other embodiments, when the white point of the display device using the display panel 100 is more seriously cyan, the display panel 100 should be red-shifted to adjust the color point of the display panel 100 so that the white point of the display panel 100 meets the requirements. In this case, the first color resist 221 is a red color resist, the second color resist 222 is one of a blue color resist and a green color resist, the third color resist 223 is the other of the blue color resist and the green color resist, and the thermochromic layer 23 absorbs heat to emit red light, so that the display panel 100 is red-shifted.

[0050] In the present invention, the display panel 100 is a liquid crystal display panel or an organic light emitting display panel. Figure 1-Figure 2 The display panel 100 is a liquid crystal display panel, such as Figure 3 The display panel 100 is an organic light emitting display panel. The two types of display panels 100 mentioned above will be described one by one below.

[0051] like Figure 1-Figure 2As shown, the color filter 2 and the substrate 1 constitute a color filter substrate of the display panel 100, and the display panel 100 further comprises an array substrate 3 arranged opposite to the color filter 2 and a liquid crystal layer 4 located between the array substrate 3 and the color filter 2, and the liquid crystal layer 4 comprises a plurality of liquid crystal molecules 41. The array substrate 3 is located on a side of the color filter 2 away from the substrate 1, and the color filter substrate and the array substrate 3 are assembled to form a liquid crystal display panel.

[0052] Specifically, the liquid crystal display device using the liquid crystal display panel includes a backlight module, which is arranged on the non-light-emitting side of the liquid crystal display panel and is used to provide backlight for the liquid crystal display panel. The backlight emitted by the backlight module will pass through the color resistance in the color filter 2. Specifically, the backlight emitted by the backlight module emits light of a first color after passing through the first color resistance 221, emits light of a second color after passing through the second color resistance 222, and emits light of a third color after passing through the third color resistance 223. The three colors of light are mixed, so that each pixel displays the mixed color, and finally the liquid crystal display panel displays the picture.

[0053] It should be noted that, for the liquid crystal display device, in order to achieve the white point required by the product, in the related art, the color point of the backlight module and the color point of the display panel 100 are generally considered to be reasonably matched. In some special cases, due to the design limitations of the display panel 100, it is impossible to match the color point of the backlight module to meet the white point requirement, so the backlight will be sacrificed to meet the color point requirement of the display panel 100, which will cause the backlight brightness to decrease, the power consumption to increase, and the risk of failure of the integrated circuit chip function to increase.

[0054] In view of this, in the embodiment of the present invention, the color filter 2 of the liquid crystal display panel is improved, specifically, by setting a thermochromic layer 23 located in the same opening 212 as the first color resistance 221, and utilizing the light-emitting principle in the thermochromic layer 23, under the premise of ensuring that the color resistance design is unchanged, the thermochromic layer 23 can absorb the heat in the liquid crystal display panel and emit the first color of light, and can adjust the color point in the liquid crystal display panel to shift the first color, thereby achieving the purpose of controllably adjusting the color point of the liquid crystal display panel. At the same time, the thermochromic layer 23 can absorb the heat in the liquid crystal display panel, which is beneficial to reducing the temperature and power consumption of the liquid crystal display panel.

[0055] In order to facilitate understanding of the technical solution provided by the present invention, the embodiment of the present invention takes the yellowish white point of the liquid crystal display device as an example, wherein the first color resistance 221 is a blue color resistance, the second color resistance 222 is one of the red color resistance and the green color resistance, and the third color resistance 223 is the other of the red color resistance and the green color resistance. That is, the thermochromic layer 23 and the blue color resistance are arranged in the same opening 212, and absorb the heat in the display panel 100 to emit blue light, so that the display panel 100 is blue-shifted, thereby effectively regulating the color point of the display panel 100, achieving a reasonable match with the color point of the backlight module without changing the backlight brightness of the backlight module, which is conducive to reducing power consumption and reducing the risk of functional failure of the integrated circuit chip.

[0056] In addition, since the operating temperature of the liquid crystal display panel is relatively high, providing the thermochromic layer 23 in the liquid crystal display panel can better excite the thermochromic material to emit light of a specific wavelength; moreover, it is beneficial to reduce the heat of the liquid crystal display panel, improve the operating stability of the liquid crystal display panel, and enhance the display effect.

[0057] Furthermore, a common electrode (not shown in the figure) is formed on the side of the color filter layer away from the substrate 1, and the common electrode is usually a transparent conductive material, such as indium tin oxide, etc. When the liquid crystal display panel is working, the common electrode on the color filter substrate and the pixel electrode on the array substrate 3 work together to drive the liquid crystal molecules 41 in the liquid crystal display panel to deflect.

[0058] Of course, the display panel 100 may also be a COA liquid crystal display panel. Specifically, the color filter 2 may also be disposed in the array substrate 3 , and the array substrate 3 includes a driving circuit layer disposed between the substrate 1 and the color filter 2 .

[0059] In another embodiment, if Figure 3 As shown, Figure 3 and Figure 1 The difference is that the display panel 100 is an organic light emitting display panel. Specifically, the display panel 100 further includes a drive array layer 5 located between the substrate 1 and the color filter 2 and a plurality of sub-pixels 6 electrically connected to the drive array layer 5, and the plurality of color resists are arranged corresponding to the plurality of sub-pixels 6. Further, the display panel 100 further includes a flat layer 7 covering the side of the sub-pixels 6 away from the substrate 1, and the color filter 2 layer is arranged on the side of the flat layer 7 away from the substrate 1.

[0060] It can be understood that the organic light-emitting display panel is a self-luminous display panel 100, which does not require a backlight module to provide backlight. Therefore, there is no need to consider the reasonable matching of the backlight color point of the backlight module and the color point of the display panel 100. However, the embodiment of the present invention utilizes the thermoluminescence principle of the thermochromic layer 23 to still achieve the purpose of regulating the white point of the display panel 100, thereby meeting the product's requirements for the white point and reducing the temperature of the display panel 100.

[0061] Accordingly, an embodiment of the present invention further provides a display device, the display device comprising the display panel 100 described above. The display device may be a liquid crystal display device or an organic light emitting display device. As described above, when the display device is a liquid crystal display panel, Figure 4 As shown, the display device further includes a backlight module 200 disposed on the non-light emitting surface of the display panel 100 , and the backlight module 200 is used to provide backlight for the display panel.

[0062] The display device provided in the embodiment of the present invention can be at least one of a smart phone, a tablet computer, a mobile phone, a video phone, an e-book reader, a laptop, a netbook, a workstation, a server, a personal digital assistant, a portable media player, an MP3 player, a mobile medical machine, a camera, a game console, a digital camera, a car navigation system, an electronic billboard, an ATM, a smart bracelet, a smart watch, a virtual reality device or a wearable device. The above embodiment has described the display panel in detail, so in the embodiment of the present invention, the display panel will not be described in detail.

[0063] Beneficial effect: In the display panel and the display device provided by the present invention, a thermochromic layer is arranged in the same opening as the first color resist, and the thermochromic layer is configured to absorb heat in the display panel and emit light of a first color. By utilizing the luminescence principle of the thermochromic layer, while ensuring that the color resist design remains unchanged, the color point in the display panel can be adjusted to perform a first color shift, thereby achieving the purpose of controllably adjusting the color point of the display panel, thereby meeting the product's requirements for the white point; at the same time, the thermochromic layer can absorb heat in the display panel, which is beneficial to reducing the temperature and power consumption of the display panel.

[0064] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0065] A display panel and a display device provided by an embodiment of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present invention. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that: It comprises a substrate and a color filter arranged on one side of the substrate, wherein the color filter comprises: The light shielding layer comprises a plurality of light shielding parts arranged at intervals, and an opening is formed between two adjacent light shielding parts; a color resist layer, comprising a plurality of color resists arranged at intervals, the color resists being located in the opening, the plurality of color resists comprising a first color resist having a first color, a second color resist having a second color, and a third color resist having a third color; and The thermochromic layer is disposed in the same opening as the first color resist, and the thermochromic layer is configured to absorb heat in the display panel and emit light of the first color.

2. The display panel according to claim 1, characterized in that: The thermochromic layer is disposed on a side of the first color resist away from the substrate.

3. The display panel according to claim 2, characterized in that: A surface of the thermochromic layer on one side away from the substrate is lower than a surface of the adjacent light shielding portion on one side away from the substrate.

4. The display panel according to claim 1, characterized in that: The thermochromic layer includes a plurality of color-changing particles doped in the first color resist.

5. The display panel according to claim 4, characterized in that: The mass fraction of the color-changing particles in the first color resist is 1%-5%.

6. The display panel according to claim 2 or 3, characterized in that: The thickness of the thermochromic layer is greater than 0 micrometer and less than 1 micrometer.

7. The display panel according to claim 1, characterized in that: The first color resist is a blue color resist, the second color resist is one of a red color resist and a green color resist, and the third color resist is the other of the red color resist and the green color resist.

8. The display panel according to claim 1, characterized in that: The material of the thermochromic layer includes an organic thermochromic ternary compound consisting of spiropyrans, bisphenols and alcohols.

9. The display panel according to claim 1, characterized in that: The display panel is an organic light emitting display panel or a liquid crystal display panel.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

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