Color film substrate and manufacturing method, contrast control method, display panel and device

Abstract

The present invention provides a color filter substrate and a manufacturing method, a contrast control method, a display panel and a device, and relates to the field of display and technology. The color filter substrate includes a first base substrate and a light control structure and a color filter layer arranged on the first base substrate; the light control structure includes: a plurality of light control units arranged in an array; the light control unit includes a first electrode and a second electrode arranged opposite to each other, a receiving cavity between the first electrode and the second electrode, and a first liquid and a second liquid arranged in the receiving cavity; wherein the light transmittance of the first liquid is lower than a preset light transmittance threshold, the second liquid is light-transmissive, the first liquid and the second liquid are immiscible, and the first liquid can switch between an expanded state and a contracted state under the control of the voltage input to the first electrode and the second electrode to change the light transmittance of the light control unit. The present invention can make the dark part of the display darker and the light part brighter, enhance the contrast, and improve the overall visual effect.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of display technology, and in particular to a color film substrate and a manufacturing method, a contrast control method, a display panel and a device. Background Art

[0002] Contrast is an important indicator for measuring display performance. High contrast can significantly improve image clarity and visual effects. In liquid crystal displays (LCDs), improving contrast helps enhance display quality. Low contrast can cause images to be blurry and not vivid enough, especially in dark scenes where details are lost, affecting viewing experience and information reading. Therefore, how to enhance the contrast of displays is particularly important. Summary of the invention

[0003] The embodiments of the present invention provide a color film substrate and a manufacturing method thereof, a contrast control method, a display panel and a device to solve the existing problem of how to enhance the contrast of a display.

[0004] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0005] In a first aspect, an embodiment of the present invention provides a color filter substrate, comprising a first base substrate and a light control structure and a color filter layer disposed on the first base substrate;

[0006] The light control structure comprises: a plurality of light control units arranged in an array; the light control unit comprises a first electrode and a second electrode arranged opposite to each other, a receiving cavity located between the first electrode and the second electrode, and a first liquid and a second liquid arranged in the receiving cavity;

[0007] Among them, the transmittance of the first liquid is lower than a preset transmittance threshold, the second liquid is transparent, the first liquid and the second liquid are immiscible, and the first liquid can switch between an expanded state and a contracted state under the control of a voltage input to the first electrode and the second electrode to change the transmittance of the light control unit.

[0008] Optionally, the color filter layer includes a plurality of color filter units;

[0009] The light control units correspond to the color filter units one by one, and the orthographic projection of each light control unit on the color filter layer covers one color filter unit;

[0010] Alternatively, the light control units of the light control structure correspond one-to-one to a group of color filter units, and the orthographic projection of each light control unit on the color filter layer covers the group of color filter units, wherein the group of color filter units includes three adjacent color filter units.

[0011] Optionally, the first liquid is an oil film, and the second liquid is water.

[0012] Optionally, the second electrode is disposed on the base substrate, and the light control unit further comprises a hydrophobic material layer, and the hydrophobic material layer is disposed on a side of the second electrode away from the base substrate.

[0013] Optionally, the light control unit further includes a first power line and a second power line, the first power line is connected to the first electrode, and the second power line is connected to the second electrode.

[0014] Optionally, the light control structure further includes a second base substrate, the plurality of light control units are disposed on the second base substrate, and the second base substrate is disposed on a side of the light control unit away from the color filter layer.

[0015] In a second aspect, an embodiment of the present invention provides a method for manufacturing a color filter substrate, comprising:

[0016] providing a first substrate;

[0017] forming a color filter layer on the first base substrate;

[0018] A light control structure is formed on a side of the color filter layer away from the first base substrate, the light control structure comprising: a plurality of light control units arranged in an array; the light control unit comprises a first electrode and a second electrode arranged opposite to each other, a receiving cavity located between the first electrode and the second electrode, and a first liquid and a second liquid arranged in the receiving cavity;

[0019] Among them, the transmittance of the first liquid is lower than a preset transmittance threshold, the second liquid is transparent, the first liquid and the second liquid are immiscible, and the first liquid can be switched between an expanded state and a contracted state under the control of a voltage input to the first electrode and the second electrode to change the transmittance of the light control unit.

[0020] In a third aspect, an embodiment of the present invention provides a display panel, comprising the color film substrate, the liquid crystal layer and the array substrate as described in the first aspect.

[0021] Optionally, the array substrate further includes a black matrix arranged in an array;

[0022] The orthographic projection of the light control unit on the black matrix at least partially overlaps with the black matrix.

[0023] In a fourth aspect, an embodiment of the present invention provides a display device, comprising the display panel as described in the third aspect.

[0024] In a fifth aspect, an embodiment of the present invention provides a display device, which is applied to the display device as described in the fourth aspect, and the method includes:

[0025] Dividing the dark area and the bright area of ​​the current display picture based on the grayscale value of the current display picture;

[0026] Controlling the voltages of the first electrode and the second electrode of the light control unit of the dark area so that the first liquid is in the expanded state and the brightness of the dark area is reduced;

[0027] The voltages of the first electrode and the second electrode of the light control unit of the bright area are controlled so that the first liquid is in the contracted state.

[0028] In the present invention, a plurality of light control units arranged in an array are provided to achieve differences in light transmittance in different areas, and a first electrode and a second electrode are provided to realize switching of the first liquid between an expanded state and a contracted state. In the expanded state, light transmission can be effectively reduced, and the light reflection coefficient (reflection brightness) of the display area can be reduced; in the contracted state, light transmission can be maintained, and the brightness (luminous brightness) of the display area can be enhanced. Therefore, by controlling the light transmittance of different light control units in different areas, the dark part can be made darker, the light part can be made brighter, and the overall contrast can be enhanced, thereby improving the overall visual effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0030] Figure 1 is a structural schematic diagram of a color filter substrate provided by an embodiment of the present invention;

[0031] Figure 2 is another structural schematic diagram of a color filter substrate provided by an embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of a display panel provided by an embodiment of the present invention;

[0033] Figure 4is a schematic diagram of a display panel provided by an embodiment of the present invention when the display panel is in a white screen;

[0034] Figure 5 is a schematic diagram of a display panel provided by an embodiment of the present invention when the display panel is in a black screen;

[0035] Figure 6 is a flow chart of a method for manufacturing a color filter substrate provided by an embodiment of the present invention;

[0036] Figure 7 is a flow chart of a contrast control method provided by an embodiment of the present invention.

[0037] Reference numerals:

[0038] First substrate 1; color filter layer 2;

[0039] Light control structure 3; first electrode 311; second electrode 312; hydrophobic material layer 32; first liquid 33; second liquid 34;

[0040] Second substrate 4; liquid crystal layer 5; black matrix 6; array substrate 7; polarizer 8. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] We can start with the formula of static contrast to consider enhancing the contrast of the screen. Contrast = brightness when emitting light (luminous brightness) / brightness when not emitting light (reflective brightness). Therefore, the main methods to improve the contrast are: one is to increase the brightness of the display screen, and the other is to reduce the light reflection coefficient of the display screen surface. However, it is impossible to control the changes in the light and dark of the LCD display by controlling the backlight on and off, and the LCD display cannot be 100% leak-free, so even if it is adjusted to a pure black screen, the LCD display will still have some brightness. However, affected by the backlight life and liquid crystal light leakage, the luminous brightness cannot be increased indefinitely.

[0043] Therefore, the present invention starts with reducing the light reflection coefficient (reflection brightness) of the display screen surface to enhance the contrast of the display screen.

[0044] Please refer to Figure 1 , an embodiment of the present invention provides a color filter substrate, comprising a first base substrate 1 and a light control structure 3 and a color filter layer 2 arranged on the first base substrate 1;

[0045] The light control structure 3 includes: a plurality of light control units arranged in an array; the light control unit includes a first electrode 311 and a second electrode 312 arranged opposite to each other, a receiving cavity between the first electrode 311 and the second electrode 312, and a first liquid 33 and a second liquid 34 arranged in the receiving cavity;

[0046] Among them, the transmittance of the first liquid 33 is lower than a preset transmittance threshold, the second liquid 34 is translucent, the first liquid 33 and the second liquid 34 are immiscible, and the first liquid 33 can be switched between an expanded state and a contracted state under the control of the voltage input to the first electrode 311 and the second electrode 312 to change the transmittance of the light control unit.

[0047] Optionally, specifically, by adjusting the voltage of the first electrode 311 and the second electrode 312, the voltage between the first liquid 33 and the solid in contact therewith can be adjusted, thereby changing the wettability of the first liquid 33 with the solid surface, thereby changing the three-phase contact angle between the first liquid 33 and the solid, driving the droplets to move, causing the first liquid 33 to deform and switch to a contracted state, and by injecting a second liquid 34 that is immiscible with the first liquid 33, the first liquid 33 can be expanded on a fixed surface in an expanded state, and switch to a contracted state after applying a voltage, shrinking into a complete droplet, thereby avoiding being dispersed into multiple small droplets under the action of voltage, affecting the transmittance and the final display effect.

[0048] Optionally, generally speaking, a transmittance lower than 50% can be considered as low transmittance, so the preset transmittance threshold can be 50%, and a liquid with a transmittance lower than 50% is selected as the first liquid 33. It is worth noting that the preset transmittance threshold can be adjusted according to actual needs, that is, the first liquid 33 can be selected according to actual needs.

[0049] The color film substrate in the present invention comprises a first base substrate 1 and a light control structure 3 and a color filter layer 2 arranged on the first base substrate 1; the light control structure 3 comprises: a plurality of light control units arranged in an array; the light control unit comprises a first electrode 311 and a second electrode 312 arranged opposite to each other, a receiving cavity located between the first electrode 311 and the second electrode 312, and a first liquid 33 and a second liquid 34 arranged in the receiving cavity; wherein the light transmittance of the first liquid 33 is lower than a preset light transmittance threshold, the second liquid 34 is light-transmissive, the first liquid 33 and the second liquid 34 are immiscible, and the first liquid 33 can be switched between an expanded state and a contracted state under the control of a voltage input to the first electrode 311 and the second electrode 312 to change the light transmittance of the light control unit. In the present invention, a plurality of light control units arranged in an array are provided to achieve differences in light transmittance in different areas, and a first electrode 311 and a second electrode 312 are provided to switch the first liquid 33 between an expanded state and a contracted state. In the expanded state, the light transmittance can be effectively reduced, and the light reflection coefficient (reflection brightness) of the display area can be reduced; in the contracted state, the light transmittance can be maintained, and the brightness (luminous brightness) of the display area can be enhanced. Therefore, by controlling the light transmittance of different light control units in different areas, the dark part can be made darker, the light part can be made brighter, and the overall contrast can be enhanced, thereby improving the overall visual effect.

[0050] Optionally, the first liquid 33 can be switched between an expanded state and a contracted state under the control of a voltage input to the first electrode 311 and the second electrode 312 to change the light transmittance of the light control unit, including:

[0051] The side of the first electrode 311 close to the array substrate 7 is defined as the light incident surface, and the side of the second electrode 312 close to the first base substrate 1 is defined as the light emitting surface. Figure 4 Taking the white screen as an example, voltage is applied to the first electrode 311 and the second electrode 312, and the first liquid 33 shrinks into a droplet. Light enters from the light incident surface, passes through the accommodating cavity, and is emitted from the light emitting surface without blocking the light. At this time, the transmittance of the light control unit remains unchanged; please refer to Figure 5 Taking the black screen area as an example, no voltage is applied to the first electrode 311 and the second electrode 312, and the first liquid 33 is expanded on the light incident surface. The leakage light in the black screen enters from the light incident surface, is reflected by the first liquid 33, and will not be emitted from the light emitting surface. Therefore, it can reduce the light transmission and reduce the light reflection coefficient (reflection brightness) of the display screen surface, and cooperate with the area that does not block the light to enhance the overall contrast.

[0052] Optionally, the color filter layer 2 includes a plurality of color filter units;

[0053] The light control units correspond to the color filter units one by one, and the orthographic projection of each light control unit on the color filter layer 2 covers one color filter unit;

[0054] Alternatively, the light control units of the light control structure 3 correspond one-to-one to a group of color filter units, and the orthographic projection of each light control unit on the color filter layer 2 covers the group of color filter units, wherein the group of color filter units includes three adjacent color filter units.

[0055] Please refer to Figure 1 In some embodiments, optionally, the light control unit corresponds to the color filter unit one by one, wherein the color filter unit is divided into an R filter unit, a G filter unit, and a B filter unit, which respectively represent the red, green, and blue sub-pixels on the color filter substrate. With one color filter unit as the control range of the light control unit, in the embodiment of the present invention, by precisely controlling the light control unit to control the transmittance of each color filter unit (sub-pixel), more precise control can be achieved, and smooth and rich color transition can be achieved. And by covering one color filter unit with the orthographic projection of each light control unit on the color filter layer 2, light leakage of the black screen can be further avoided. Through the above embodiment, individual control of each sub-pixel can be achieved.

[0056] Please refer to Figure 2 In other embodiments, optionally, the light control unit of the light control structure 3 corresponds to a group of color filter units one by one, and a group of color filter units includes an R filter unit, a G filter unit, and a B filter unit, which represents a pixel composed of three sub-pixels of red, green, and blue on the color filter substrate. In actual use, a group of color filter units are mixed to form the color of a pixel. Therefore, a group of color filter units can also be used as the control range of the light control unit, which can reduce the manufacturing process in the manufacturing process, and can also reduce the number of power lines and save costs. And by covering the group of color filter units with the orthographic projection of each light control unit on the color filter layer 2, it can further avoid light leakage of the black screen. Through the above embodiment, it is possible to achieve individual control of each sub-pixel.

[0057] It is worth noting that in the above two embodiments, the overall contrast can be enhanced by controlling the transmittance of different light control units in different areas. However, the two embodiments have different advantages, so in actual use, they can be selected according to needs. In addition to the above embodiments, light control units of other sizes can also be selected, and the present invention does not limit them.

[0058] Optionally, the first liquid 33 is an oil film, and the second liquid 34 is water.

[0059] In some embodiments, optionally, a material with low light transmittance and liquid at room temperature can be selected to form an oil film. The oil film has chemical stability to ensure that the oil film does not react with water or other contact substrates, and has temperature stability to ensure that the oil film remains in a liquid state within the use temperature range during use, so that it can switch between an expanded state and a contracted state under the action of a voltage. Optionally, materials such as petroleum ether, chlorinated paraffin or toluene can be selected as raw materials for the oil film, or a variety of different materials can be mixed to form a more stable oil film. The present invention does not limit the selection of materials, as long as it can meet the requirements of the embodiments of the present invention, so it will not be repeated.

[0060] Optionally, the second electrode 312 is disposed on the base substrate, and the light control unit further includes a hydrophobic material layer 32 , and the hydrophobic material layer 32 is disposed on a side of the second electrode 312 away from the base substrate.

[0061] For further information, please refer to Figure 1 In some embodiments, optionally, in order to allow the oil film to better adhere to the light surface, a layer of hydrophobic material layer 32 can be added to reduce the contact area between water and the material surface, so that the water drop oil film can be more attached to the hydrophobic material layer 32, and the first liquid 33 can be in the expanded state. The surface can be completely covered with light, so that the incoming light can be effectively reduced, thereby enhancing the optimization effect.

[0062] Optionally, the light control unit further includes a first power line and a second power line, the first power line is connected to the first electrode 311 , and the second power line is connected to the second electrode 312 .

[0063] In some embodiments, optionally, refer to Figure 1 and Figure 2 By adjusting the voltage of the first electrode 311 and the second electrode 312, the first power line and the second power line are respectively connected to the first electrode 311 and the second electrode 312. Through the separately provided power line, the light control unit can be separately controlled to achieve a better contrast display.

[0064] Optionally, the light control structure 3 further includes a second base substrate 4 , the plurality of light control units are disposed on the second base substrate 4 , and the second base substrate 4 is disposed on a side of the light control unit away from the color filter layer 2 .

[0065] In some embodiments, optionally, by setting a second base substrate 4, during the manufacturing process, the light control structure 3 can be directly formed on the second base substrate 4, and then integrated into the color filter substrate after being generated separately. The light control structure 3 is formed on the separate second base substrate 4, which can effectively simplify the manufacturing process, improve the processing and inspection accuracy of each layer, optimize the performance of the optical element, and reduce the defect rate. Furthermore, the materials and structures of the second base substrate 4 and the color filter substrate can be flexibly adjusted to meet different display requirements. If a certain optical property needs to be changed, it is only necessary to replace the corresponding second base substrate 4 without redesigning the entire color filter substrate. Optionally, the second base substrate 4 can be a glass substrate with a reflection coefficient of about 0.3. Under the condition that the luminous brightness remains unchanged, the color filter substrate in the present invention can reduce the reflection coefficient even further, so the contrast of the display can be improved.

[0066] Please refer to Figure 6 The embodiment of the present invention further provides a method for manufacturing a color filter substrate, comprising:

[0067] Step S11: providing a first substrate 1;

[0068] Step S12: forming a color filter layer 2 on the first base substrate 1;

[0069] Step S13: forming a light control structure 3 on a side of the color filter layer 2 away from the first base substrate 1, the light control structure 3 comprising: a plurality of light control units arranged in an array; the light control unit comprising a first electrode 311 and a second electrode 312 arranged opposite to each other, a receiving cavity located between the first electrode 311 and the second electrode 312, and a first liquid 33 and a second liquid 34 arranged in the receiving cavity;

[0070] Among them, the transmittance of the first liquid 33 is lower than a preset transmittance threshold, the second liquid 34 is translucent, the first liquid 33 and the second liquid 34 are immiscible, and the first liquid 33 can be switched between an expanded state and a contracted state under the control of the voltage input to the first electrode 311 and the second electrode 312 to change the transmittance of the light control unit.

[0071] The color filter substrate manufactured by the method for manufacturing the color filter substrate provided in the embodiment of the present invention can realize the various processes realized in the above embodiments and achieve the same technical effect, which will not be described again here to avoid repetition.

[0072] Please refer to Figure 3 An embodiment of the present invention further provides a display panel, comprising the color film substrate described in any one of the above items, a liquid crystal layer 5 and an array substrate 7.

[0073] The display panel provided by the embodiment of the present invention can implement each process implemented by the above embodiment and achieve the same technical effect, which will not be described again here to avoid repetition.

[0074] Optional, please refer to Figure 3 , the array substrate 7 also includes a black matrix 6 arranged in an array;

[0075] The orthographic projection of the light control unit on the black matrix 6 at least partially overlaps with the black matrix 6 .

[0076] Please refer to Figure 5 and Figure 6 The black matrix 6 is located between adjacent sub-pixels, which can effectively block the scattering of the backlight source and prevent the light from interfering with each other between sub-pixels of different colors, thereby improving the clarity and contrast of the image. By setting the positive projection of the light control unit on the black matrix 6 to overlap at least partially with the black matrix 6, the light scattering and crosstalk can be reduced, and the light reflected by the first liquid 33 can be further absorbed, which can significantly increase the contrast of the display, making the dark part darker and the light part brighter, thereby improving the overall visual effect.

[0077] Optionally, please refer to the figure, the display panel also includes a polarizer 8.

[0078] An embodiment of the present invention further provides a display device, comprising any one of the display panels described above.

[0079] The display device provided by the embodiment of the present invention can implement each process implemented by the above embodiment and achieve the same technical effect. To avoid repetition, it will not be described here.

[0080] Please refer to Figure 7 The embodiment of the present invention further provides a contrast control method, which is applied to the display device described above, and the method includes:

[0081] Step S21: dividing the dark area and the bright area of ​​the current display picture based on the grayscale value of the current display picture;

[0082] Step S22: controlling the voltages of the first electrode 311 and the second electrode 312 of the light control unit of the dark area so that the first liquid 33 is in the expanded state, thereby reducing the brightness of the dark area;

[0083] Step S23: controlling the voltages of the first electrode 311 and the second electrode 312 of the light control unit in the bright area so that the first liquid 33 is in the contracted state.

[0084] The contrast control method provided by the present invention is applied to the display device described above, and can accurately distinguish the dark and bright areas in the display screen by dividing the grayscale value, thereby achieving more detailed brightness control. And the dark and bright areas are adjusted according to the real-time grayscale value changes, so that the display dynamic response is faster and the image clarity can still be guaranteed in high-speed scenes. Based on the structural improvement of the above display device, the brightness of the dark area can be reduced, the clarity and detail performance of the highlight part can be improved, and the overall contrast of the screen can be significantly improved, making the image more vivid and clear.

[0085] Unless otherwise specified, spatial descriptions such as "above", "below", "upward", "left", "right", "downward", "top", "bottom", "vertical", "horizontal", "side", "above", "below", "upper", "above", "below" are indicated relative to the orientation shown in the drawings. It should be understood that the spatial descriptions used herein are for illustrative purposes only, and actual implementations of the structures described herein may be spatially arranged in any orientation or manner, with the limitation that the advantages of the embodiments of the present disclosure are not deviated by such arrangements.

[0086] As used herein, the term "vertical" is used to refer to an upward and downward direction, while the term "horizontal" refers to a direction transverse to the vertical direction.

[0087] As used herein, the terms "approximately," "substantially," "generally," and "about" are used to describe and explain small variations. When used in conjunction with an event or circumstance, the terms may refer to instances where the event or circumstance occurred precisely as well as instances where the event or circumstance occurred very approximately. For example, when used in conjunction with a numerical value, the terms may refer to a range of variation less than or equal to ±10% of the numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%. For example, if a first numerical value is within a range of variation less than or equal to ±10% of a second numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%, then the first numerical value may be considered to be "substantially" the same as or equal to the second numerical value. For example, "substantially" vertical may refer to an angular variation range of less than or equal to ±10° relative to 90°, such as less than or equal to ±5°, less than or equal to ±4°, less than or equal to ±3°, less than or equal to ±2°, less than or equal to ±1°, less than or equal to ±0.5°, less than or equal to ±0.1°, or less than or equal to ±0.05°.

[0088] Two surfaces are considered coplanar or substantially coplanar if the displacement between them does not exceed 5 µm, 2 µm, 1 µm or 0.5 µm. Surfaces are considered substantially flat if the displacement between the highest and lowest points of the surface does not exceed 5 µm, 2 µm, 1 µm or 0.5 µm.

[0089] As used herein, the singular terms "a," "an," and "the" may include plural referents unless the context clearly dictates otherwise.

[0090] As used herein, the terms "conductive," "electrically conductive," and "conductivity" refer to the ability to carry an electric current. Conductive materials generally refer to those materials that present little or no resistance to the flow of electric current. One measure of conductivity is Siemens per meter (S / m). Typically, a conductive material is a material with a conductivity greater than about 104 S / m (such as at least 105 S / m or at least 106 S / m). The conductivity of a material can sometimes vary with temperature. Unless otherwise specified, the conductivity of a material is measured at room temperature.

[0091] As used herein, the terms “connect,” “couple,” or “connected” and similar terms are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect.

[0092] In addition, amounts, ratios and other numerical values ​​are sometimes presented herein in a range format. It should be understood that such a range format is used for convenience and brevity, and should be flexibly interpreted to include not only the values ​​explicitly specified as the limits of the range, but also all individual values ​​or sub-ranges encompassed within that range, as if each value and sub-range were explicitly specified.

[0093] Although the present disclosure has been described and illustrated with reference to specific embodiments of the present disclosure, these descriptions and illustrations are not restrictive. It should be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the true spirit and scope of the present disclosure as defined by the appended claims. The illustrations may not necessarily be drawn to scale. Due to manufacturing processes and tolerances, there may be differences between the process reproduction in the present disclosure and the actual equipment. There may be other embodiments of the present disclosure that are not specifically described. This specification and drawings should be regarded as illustrative rather than restrictive. Modifications may be made to make specific situations, materials, material compositions, methods or processes suitable for the goals, spirit and scope of the present disclosure. All such modifications are intended to be within the scope of the appended claims. Although the methods disclosed herein have been described with reference to specific operations performed in a specific order, it should be understood that these operations may be combined, subdivided or reordered to form equivalent methods without departing from the teachings of the present disclosure. Accordingly, unless specifically indicated herein, the order and grouping of operations are not limitations of the present disclosure.

Claims

1. A color film substrate, characterized in that: It includes a first base substrate and a light control structure and a color filter layer arranged on the first base substrate; The light control structure comprises: a plurality of light control units arranged in an array; the light control unit comprises a first electrode and a second electrode arranged opposite to each other, a receiving cavity located between the first electrode and the second electrode, and a first liquid and a second liquid arranged in the receiving cavity; The transmittance of the first liquid is lower than a preset transmittance threshold, the second liquid is transparent, the first liquid and the second liquid are immiscible, and the first liquid can switch between an expanded state and a contracted state under the control of a voltage input to the first electrode and the second electrode to change the transmittance of the light control unit; the first liquid is an oil film, and the second liquid is water; the second electrode is arranged on the substrate, and the light control unit also includes a hydrophobic material layer, and the hydrophobic material layer is arranged on a side of the second electrode away from the substrate; by adjusting the voltage of the first electrode and the second electrode, the voltage between the first liquid and the hydrophobic material layer is adjusted, and the wettability of the first liquid and the surface of the hydrophobic material layer is changed, thereby changing the three-phase contact angle between the first liquid and the hydrophobic material layer, so that the first liquid switches between an expanded state and a contracted state, and the first liquid can be expanded on a fixed surface in the expanded state, and the first liquid is a complete droplet in the contracted state; When a voltage is applied to the first electrode and the second electrode, the first liquid shrinks into a droplet, and light enters from the light incident surface, passes through the containing cavity, and is emitted from the light emitting surface; when no voltage is applied to the first electrode and the second electrode, the first liquid expands on the light incident surface, and leakage light enters from the light incident surface, is reflected by the first liquid, and does not emit from the light emitting surface.

2. The color film substrate according to claim 1, characterized in that: The color filter layer includes a plurality of color filter units; The light control units correspond to the color filter units one by one, and the orthographic projection of each light control unit on the color filter layer covers one color filter unit; Alternatively, the light control units of the light control structure correspond one-to-one to a group of color filter units, and the orthographic projection of each light control unit on the color filter layer covers the group of color filter units, wherein the group of color filter units includes three adjacent color filter units.

3. The color film substrate according to claim 1, characterized in that: The light control unit further includes a first power line and a second power line, wherein the first power line is connected to the first electrode, and the second power line is connected to the second electrode.

4. The color film substrate according to claim 1, characterized in that: The light control structure further includes a second base substrate, the plurality of light control units are disposed on the second base substrate, and the second base substrate is disposed on a side of the light control unit away from the color filter layer.

5. A method for manufacturing a color film substrate, characterized in that: include: providing a first substrate; forming a color filter layer on the first base substrate; A light control structure is formed on a side of the color filter layer away from the first base substrate, the light control structure comprising: a plurality of light control units arranged in an array; the light control unit comprises a first electrode and a second electrode arranged opposite to each other, a receiving cavity located between the first electrode and the second electrode, and a first liquid and a second liquid arranged in the receiving cavity; The light transmittance of the first liquid is lower than a preset light transmittance threshold, the second liquid is light transparent, the first liquid and the second liquid are immiscible, and the first liquid can switch between an expanded state and a contracted state under the control of a voltage input to the first electrode and the second electrode to change the light transmittance of the light control unit; the first liquid is an oil film, and the second liquid is water; the second electrode is arranged on the substrate, and the light control unit also includes a hydrophobic material layer, and the hydrophobic material layer is arranged on a side of the second electrode away from the substrate; by adjusting the voltage of the first electrode and the second electrode, the voltage between the first liquid and the hydrophobic material layer is adjusted, and the wettability of the first liquid and the surface of the hydrophobic material layer is changed, thereby changing the three-phase contact angle between the first liquid and the hydrophobic material layer, so that the first liquid switches between an expanded state and a contracted state, and the first liquid can be expanded on a fixed surface in the expanded state, and the first liquid is a complete droplet in the contracted state; When a voltage is applied to the first electrode and the second electrode, the first liquid shrinks into a droplet, and light enters from the light incident surface, passes through the containing cavity, and is emitted from the light emitting surface; when no voltage is applied to the first electrode and the second electrode, the first liquid expands on the light incident surface, and leakage light enters from the light incident surface, is reflected by the first liquid, and does not emit from the light emitting surface.

6. A display panel, characterized in that: It comprises the color filter substrate, a liquid crystal layer and an array substrate as claimed in claim 1.

7. The display panel according to claim 6, characterized in that: The array substrate also includes a black matrix arranged in an array; The orthographic projection of the light control unit on the black matrix at least partially overlaps with the black matrix.

8. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 6 and 7.

9. A contrast control method, characterized in that: Applied to the display device as claimed in claim 8, the method comprises: Dividing the dark area and the bright area of ​​the current display picture based on the grayscale value of the current display picture; Controlling the voltages of the first electrode and the second electrode of the light control unit of the dark area so that the first liquid is in the expanded state and the brightness of the dark area is reduced; The voltages of the first electrode and the second electrode of the light control unit of the bright area are controlled so that the first liquid is in the contracted state.

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