Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a plurality of pixels arranged in a two-dimensional array, and each pixel comprises a first sub-pixel, a second sub-pixel and a third sub-pixel; wherein the first sub-pixel allows light of a first color and white light to pass through, the second sub-pixel only allows light of a second color to pass through, and the third sub-pixel only allows light of a third color to pass through. The display panel improves the light energy utilization rate and effectively improves the energy efficiency ratio.

Description

TECHNICAL FIELD

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

[0002] Liquid Crystal Display (LCD) belongs to a kind of flat panel display, and is widely used in television, computer, smart phone, mobile phone, car navigation device, electronic book and other products.Liquid crystal display has the advantages of low power consumption, small size and low radiation, and gradually replaces cathode ray tube display.

[0003] With the evolution of display terminals towards high color gamut and high energy efficiency, users have higher requirements for color reproduction, brightness uniformity, dynamic contrast and power consumption control of display equipment.Current mainstream display technology still takes spatial color mixing method as the core, and realizes color synthesis by integrating RGB color filter (CF) on the liquid crystal layer.Although this technology has a mature industrial chain, it has the problems of limited color performance, low light energy utilization and low energy efficiency ratio. SUMMARY

[0004] The present application provides a display panel and a display device, aiming to solve the problems of low light energy utilization and low energy efficiency ratio existing in the prior art liquid crystal display panel.

[0005] To solve the above technical problems, one technical solution adopted by the present application is to provide a display panel, comprising a plurality of pixels arranged in a two-dimensional array, each pixel comprising a first sub-pixel, a second sub-pixel and a third sub-pixel; wherein the first sub-pixel allows the first color light and white light to be transmitted, the second sub-pixel only allows the second color light to be transmitted, and the third sub-pixel only allows the third color light to be transmitted.

[0006] In a specific embodiment, the display panel comprises an array substrate, a liquid crystal layer and a color film substrate; the color film substrate comprises a first glass plate, a first transparent conductive layer and a photoresist layer which are sequentially stacked; the photoresist layer comprises a photoresist layer hollow part, a second color photoresist layer and a third color photoresist layer; the first sub-pixel is the photoresist layer hollow part; the second sub-pixel is the second color photoresist layer, and the third sub-pixel is the third color photoresist layer.

[0007] In a specific embodiment, the color film substrate further comprises a second transparent conductive layer, which covers one side of the photoresist layer away from the first glass plate; in the photoresist layer hollow part, the second transparent conductive layer is in laminated contact with the first transparent conductive layer.

[0008] In a specific embodiment, the display panel comprises an array substrate, a liquid crystal layer, and a color film substrate; the color film substrate comprises a first glass plate, a photoresist layer, and a transparent conductive layer which are sequentially stacked; the photoresist layer comprises a transparent photoresist layer, a photoresist layer of the second color, and a photoresist layer of the third color; the first sub-pixel is the transparent photoresist layer; the second sub-pixel is the photoresist layer of the second color, and the third sub-pixel is the photoresist layer of the third color.

[0009] To solve the above technical problems, another technical solution adopted by the present application is to provide a display device comprising:

[0010] A backlight module comprising a back plate and a lamp plate arranged on the back plate, the lamp plate comprising a plurality of first chips for emitting light of a first color and a plurality of second chips for emitting white light;

[0011] A display panel arranged on the light-emitting side of the backlight module; the display panel is any of the display panels described above;

[0012] A control unit electrically connected to the backlight module and the display panel, respectively, for controlling the first chips and / or the second chips to emit light, and controlling the opening or closing of the liquid crystal layer corresponding to the sub-pixels of the display panel.

[0013] In a specific embodiment, the control unit is configured to:

[0014] control the first chips and the second chips to emit light in a time sequence, and

[0015] control the opening of the liquid crystal layer corresponding to the first sub-pixel while the first chips emit light, so that the light of the first color emitted by the first chips forms the first color of the emitted light through the first sub-pixel;

[0016] control the opening of the liquid crystal layer corresponding to the second sub-pixel and / or the third sub-pixel while the second chips emit light, so that the white light emitted by the second chips forms the second color of the emitted light through the second sub-pixel, and / or the white light emitted by the second chips forms the third color of the emitted light through the third sub-pixel.

[0017] In a specific embodiment, the control unit is configured to control the first chips not to emit light, and control the second chips to emit light while:

[0018] control the opening of the liquid crystal layer corresponding to the first sub-pixel, so that the white light emitted by the second chips forms the enhanced light through the first sub-pixel; and

[0019] Control the opening of the liquid crystal layer corresponding to the second sub-pixel and / or the third sub-pixel, so that the white light emitted by the second chip passes through the second sub-pixel to form the emitted light of the second color, and / or the white light emitted by the second chip passes through the third sub-pixel to form the emitted light of the third color.

[0020] In one specific embodiment, the control unit is used to: control both the first chip and the second chip to emit light, while controlling the opening of the liquid crystal layer corresponding to the first sub-pixel, so that light of the first color emitted by the first chip passes through the first sub-pixel to form emitted light of the first color, and white light emitted by the second chip passes through the first sub-pixel to form enhanced light.

[0021] In one specific embodiment, the control unit is used to: control the first chip to not emit light, control the second chip to emit light, and simultaneously control the liquid crystal layer corresponding to the first sub-pixel to open and control the liquid crystal layers corresponding to the second and third sub-pixels to close, so that the white light emitted by the second chip passes through the first sub-pixel to form the first white light.

[0022] In one specific embodiment, the control unit is used to: control both the first chip and the second chip to emit light simultaneously:

[0023] The liquid crystal layer corresponding to the first sub-pixel is opened, so that the white light emitted by the second chip passes through the first sub-pixel to form the first white light, and the light of the first color emitted by the first chip passes through the first sub-pixel to form the emitted light of the first color.

[0024] The liquid crystal layers corresponding to the second sub-pixel and the third sub-pixel are both turned on, so that the white light emitted by the second chip passes through the second sub-pixel to form the second color of emitted light, and the white light emitted by the second chip passes through the third sub-pixel to form the third color of emitted light. The emitted light of the first color, the emitted light of the second color, and the emitted light of the third color are mixed to form the second white light.

[0025] The beneficial effects of the embodiments of this application are as follows: Unlike the prior art, the embodiments of this application provide a display panel and a display device. The display panel includes a plurality of pixels arranged in a two-dimensional array, each pixel including a first sub-pixel, a second sub-pixel, and a third sub-pixel. The first sub-pixel allows light of a first color and white light to pass through, the second sub-pixel only allows light of a second color to pass through, and the third sub-pixel only allows light of a third color to pass through. By setting a first sub-pixel that allows light of the first color and white light to pass through, the absorption loss of white light by the filter is reduced, thereby improving the light energy utilization rate of the display panel. This allows the display panel to achieve higher brightness with the same power consumption, effectively improving the energy efficiency ratio. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A structure schematic diagram of a display panel provided by a first embodiment of the present application is shown in the figure.

[0027] Figure 2a A structure schematic diagram of a display device provided by a third embodiment of the present application is shown in the figure. Figure 1 A sectional view of the display panel shown in the figure along the line A-A.

[0028] Figure 2b A sectional view of a display panel provided by another embodiment of the present application along the line A-A.

[0029] Figure 2c A sectional view of a display panel provided by yet another embodiment of the present application along the line A-A.

[0030] Figure 3 A sectional view of a display panel provided by a second embodiment of the present application along the line A-A.

[0031] Figure 4 A structure schematic diagram of a display device provided by a third embodiment of the present application is shown in the figure.

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 1 - display panel; 2 - backlight module; 3 - control unit; 11 - array substrate; 12 - liquid crystal layer; 13 - color film substrate; 21 - back plate; 22 - lamp plate; 131 - first glass plate; 132 - first transparent conductive layer; 1333 - photoresist layer; 134 - second transparent conductive layer; 135 - transparent conductive layer; 136 - black matrix; 221 - first chip; 222 - second chip; 1331 - first sub-pixel; 1332 - second sub-pixel; 1333 - third sub-pixel. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present application.

[0035] The terms "first", "second", "third", etc. in the present application are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0036] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that the embodiments described herein are merely examples from among a great variety of embodiments that can be made.

[0037] At present, the mainstream display technology still takes spatial color mixing method as the core, and color synthesis is realized by integrating RGB color filter (CF) on the liquid crystal layer. Although this technology has a mature industrial chain, it has problems such as limited color performance, low light energy utilization rate and low energy efficiency ratio. In order to solve the above problems, the time sequential color (FSC) technology has become an important development direction. This technology discards the CF film layer, adopts RGB three-color light source time sharing switching, and synthesizes a full-color image through the human eye visual persistence effect to improve the display effect and energy efficiency ratio; but the time sequential color technology still has the problems of complex control and high manufacturing cost.

[0038] Based on this, the display panel and display device provided by the embodiments of the present application can improve the light energy utilization rate and energy efficiency ratio of the display panel, and effectively reduce the manufacturing cost.

[0039] The present application will be described in detail below in conjunction with the drawings and embodiments.

[0040] Reference Figures 1-2a , Figure 1A structural schematic diagram of a display panel provided by the first embodiment of the present application is shown in the figure. Figure 2a A structural schematic diagram of a display panel provided by the first embodiment of the present application is shown in the figure. Figure 1 A cross-sectional view of the display panel shown in the figure along the line A-A. The display panel 1 provided by the embodiment of the present application can be a liquid crystal display panel, which is used to display a picture.

[0041] Specifically, the display panel 1 can include a plurality of pixels arranged in a two-dimensional array, which are used to transmit light of different colors to form a display picture. Specifically, each pixel includes a first sub-pixel 1331, a second sub-pixel 1332, and a third sub-pixel 1333.

[0042] Among them, the first sub-pixel 1331 allows the first color light and white light to be transmitted, so that the first sub-pixel 1331 can display the first color; the second sub-pixel 1332 only allows the second color light to be transmitted and absorbs light of other colors except the second color, so that the second sub-pixel 1332 can display the second color; the third sub-pixel 1333 only allows the third color light to be transmitted and absorbs light of other colors except the second color, so that the third sub-pixel 1333 can display the third color. In this way, color display is realized by mixing light of different colors.

[0043] Those skilled in the art can understand that white light is formed by mixing light of different colors, and compared with the second sub-pixel 1332 and the third sub-pixel 1333, the first sub-pixel 1331 allows white light to be transmitted, which means that it does not absorb light of various colors in white light, of course, it also does not absorb the first color light, effectively reducing the absorption loss of the first color light and white light by the first sub-pixel 1331. In this way, by setting the first sub-pixel 1331 that can allow the first color light and white light to be transmitted, the absorption loss of the white light by the filter is reduced, thereby improving the light energy utilization rate of the display panel 1, and further enabling the display panel 1 to obtain higher brightness under the same power consumption, effectively improving the energy efficiency ratio.

[0044] In specific embodiments, the display panel 1 can include an array substrate 11, a liquid crystal layer 12, and a color film substrate 13. Among them, the array substrate 11 is used to drive the pixel switch and control the transmission of light to control the display picture; specifically, the array substrate 11 includes a glass substrate and structural members such as thin film transistors, and the specific structures and functions of these structural members are the same as or similar to the related structures in the prior art. For details, please refer to the prior art, which will not be described here.

[0045] The liquid crystal layer 12 is arranged on the array substrate 11; the liquid crystal layer 12 has liquid crystal molecules, which can change the arrangement direction under the control of the electric field, thereby controlling the transmission of light and further controlling the brightness of each pixel to form a display picture.

[0046] The color film substrate 13 can be arranged on the side of the liquid crystal layer 12 away from the array substrate 11. Specifically, the color film substrate 13 can include a first glass plate 131, a first transparent conductive layer 132, and a light blocking layer 133 arranged in sequence. The first glass plate 131 serves as a substrate and plays a supporting and protecting role. The first transparent conductive layer 132 can be indium tin oxide (ITO), which is used to apply a voltage to the liquid crystal layer 12 to form an electric field for controlling liquid crystal molecules. The first transparent conductive layer 132 extends to the non-display area of the display panel 1 and is connected to the common voltage line of the array substrate 11 through a gold ball to facilitate power supply to the first transparent conductive layer 132.

[0047] The light blocking layer 133 is used to transmit light of different colors to form a color image. Specifically, the light blocking layer 133 includes light blocking layer 133 hollow parts, second color light blocking layer 133, and third color light blocking layer 133, and the plurality of light blocking layer 133 hollow parts, the plurality of second color light blocking layer 133, and the plurality of third color light blocking layer 133 are arranged in two dimensions on the color film substrate 13. Each light blocking layer 133 forms a sub-pixel, and each sub-pixel allows light of a specific wavelength to pass through.

[0048] Specifically, the first sub-pixel 1331 can be a light blocking layer 133 hollow part, so that the first sub-pixel 1331 can allow light of the first color and white light to pass through and reduce absorption loss of light. The second sub-pixel 1332 can be a second color light blocking layer 133, so that the second sub-pixel 1332 only allows light of the second color in white light to pass through. The third sub-pixel 1333 can be a third color light blocking layer 133, so that the third sub-pixel 1333 only allows light of the third color in white light to pass through.

[0049] It can be understood that, compared with the common transparent conductive layer 135 arranged on the side of the light blocking layer 133 away from the glass substrate, the transparent conductive layer 135 has a large surface undulation on the light blocking layer 133 and has a risk of breaking. By arranging the first transparent conductive layer 132 between the light blocking layer 133 and the first glass plate 131, the first transparent conductive layer 132 can be flattened, effectively reducing the risk of breaking.

[0050] Further, the color filter substrate 13 can further include a second transparent conductive layer 134, which is arranged on the side of the photoresist layer 133 away from the first glass plate 131; in the hollow part of the photoresist layer 133, the second transparent conductive layer 134 is in contact with the first transparent conductive layer 132, and the second transparent layer also extends to the non-display area of the display panel 1 and is in contact with the first transparent conductive layer 132, both of which are connected to the common voltage line of the array substrate 11 through gold balls, so as to supply power to the first transparent conductive layer 132 and the second transparent conductive layer 134, so that the first transparent conductive layer 132 and the second transparent conductive layer 134 can both apply voltage to the liquid crystal layer 12. The second transparent conductive layer 134 can also be ITO material.

[0051] It can be understood that, since the structure of the photoresist layer 133 corresponding to the first sub-pixel 1331 is different from the structure of the photoresist layer 133 corresponding to the second sub-pixel 1332 and the third sub-pixel 1333, the first transparent conductive layer 132 arranged between the photoresist layer 133 and the first glass plate 131 can affect the uniformity of the electric field applied by the first transparent conductive layer 132. Therefore, the second transparent conductive layer 134 arranged on the side of the photoresist layer 133 away from the photoresist layer 133 can avoid the situation that the photoresist layer 133 affects the uniformity of the electric field applied by the second transparent conductive layer 134 to the liquid crystal layer 12. In addition, the first transparent conductive layer 132 and the second transparent conductive layer 134 arranged on both sides of the photoresist layer 133 serve as backup transparent conductive layers 135 for each other, so as to ensure stable transmission of signals.

[0052] As shown in FIG. 1, Figure 2b As shown in FIG. 1, Figure 2b FIG. 1 shows a cross-sectional view of a display panel along the A-A line according to another embodiment of the present application; in some embodiments, the color filter substrate 13 can only include the first transparent conductive layer 132 arranged between the first glass plate 131 and the photoresist layer 133, so as to reduce the risk of breakage while reducing the number of film layers of the display panel, thereby simplifying the manufacturing process and reducing manufacturing costs.

[0053] As shown in FIG. 1, Figure 2c As shown in FIG. 1, Figure 2c FIG. 1 shows a cross-sectional view of a display panel along the A-A line according to another embodiment of the present application; in some embodiments, the color filter substrate 13 can only include the first transparent conductive layer 132 arranged between the first glass plate 131 and the photoresist layer 133, so as to reduce the risk of breakage while reducing the number of film layers of the display panel, thereby simplifying the manufacturing process and reducing manufacturing costs.

[0054] As shown in FIG. 1, Figure 3 , Figure 3A cross-sectional view of the display panel along line AA provided in the second embodiment of this application; the display panel 1 provided in the second embodiment of this application has a structure that is basically the same as that provided in the first embodiment of this application, except that in the second embodiment, the color filter substrate 13 includes a first glass plate 131, a photoresist layer 133 and a transparent conductive layer 135 stacked in sequence; the photoresist layer 133 includes a transparent photoresist layer 133, a second color photoresist layer 133 and a third color photoresist layer 133; that is, the transparent conductive layer 135 is disposed on the side of the photoresist layer 133 away from the first glass plate 131, and is used to apply a voltage to the liquid crystal layer 12 to form an electric field that controls the liquid crystal molecules.

[0055] The first sub-pixel 1331 can be a transparent photoresist layer 133, allowing both first-color light and white light to pass through while reducing light absorption and loss. The second sub-pixel 1332 can be a second-color photoresist layer 133, allowing only the second color of white light to pass through. The third sub-pixel 1333 can be a third-color photoresist layer 133, allowing only the third color of white light to pass through.

[0056] Thus, by setting the first sub-pixel 1331 as a transparent photoresist layer 133, the transparent conductive layer 135 disposed on the surface of the photoresist layer 133 is made as flat as possible, reducing the degree of undulation of the transparent conductive layer 135, reducing the risk of breakage of the transparent conductive layer 135, and avoiding affecting the uniformity of the electric field applied to the transparent conductive layer 135.

[0057] like Figure 2a As shown, in a specific embodiment, the color filter substrate 13 may further include a black matrix 136 for shielding the metal layer located between adjacent pixels to absorb ambient light illuminating the non-opening area and reduce the reflection of ambient light by the display panel 1. Specifically, the black matrix 136 is disposed between the first sub-pixel 1331 and the second sub-pixel 1332, between the second sub-pixel 1332 and the third sub-pixel 1333, and between the third sub-pixel 1333 and the first sub-pixel 1331, forming a grid structure to enclose and form a light-emitting area. The black matrix 136 surrounding each sub-pixel can also prevent light leakage and avoid the light emitted by one pixel from affecting the light emission display of adjacent pixels, thus preventing pixel crosstalk.

[0058] In a specific embodiment, the display panel also includes an alignment layer (not shown) and a polarizer (not shown), etc. The specific structure and function of these layers are the same as or similar to the relevant layers in the prior art. For details, please refer to the prior art, which will not be repeated here.

[0059] The display panel 1 provided in the embodiment of the present application comprises a plurality of pixels arranged in a two-dimensional array, each pixel comprising a first sub-pixel 1331, a second sub-pixel 1332 and a third sub-pixel 1333; wherein the first sub-pixel 1331 allows the first color light and the white light to be transmitted, the second sub-pixel 1332 only allows the second color light to be transmitted, and the third sub-pixel 1333 only allows the third color light to be transmitted. By setting the first sub-pixel 1331 capable of allowing the first color light and the white light to be transmitted, the absorption loss of the white light by the filter is reduced, thereby improving the light energy utilization rate of the display panel 1, and further enabling the display panel 1 to obtain higher brightness under the same power consumption, and effectively improving the energy efficiency ratio.

[0060] Reference is made to Figure 4 , Figure 4 The structural schematic diagram of the display device provided in the third embodiment of the present application; the third embodiment of the present application provides a display device for displaying a picture. The display device can comprise a backlight module 2, a display panel 1 and a control unit 3.

[0061] The backlight module 2 is used for providing backlight, and the backlight module 2 can comprise a back plate 21 for providing support and a lamp plate 22 arranged on the back plate 21; the lamp plate 22 integrates two different types of light emitting diode (Light Emitting Diode, LED) chips, including a plurality of first chips 221 for emitting first color light and a plurality of second chips 222 for emitting white light. Specifically, the plurality of first chips 221 and the plurality of second chips 222 can be packaged in different lamp beads and arranged and uniformly distributed on the lamp plate 22. In some embodiments, the first chips 221 and the second chips 222 can also be packaged in the same lamp bead.

[0062] The display panel 1 is the display panel 1 involved in any of the above embodiments; specifically, the display panel 1 is arranged on the light emitting side of the backlight module 2, used for receiving and processing the light from the backlight module 2 and converting it into a color image that can be recognized by the human eye.

[0063] In combination with Figure 4 and Figure 2a Specifically, the first sub-pixel 1331 in the display panel 1 can allow the first color light emitted by the first chip 221 and the white light emitted by the second chip 222 to be transmitted; the second sub-pixel 1332 can absorb other color light in the white light emitted by the second chip 222 and only allow the second color light in the white light to be transmitted; and the third sub-pixel 1333 can absorb other color light in the white light emitted by the second chip 222 and only allow the third color light to be transmitted.

[0064] As Figure 4As shown, the control unit 3 is electrically connected with the backlight module 2 and the display panel 1 respectively, for controlling the first chip 221 and / or the second chip 222 to emit light, and controlling the opening or closing of the liquid crystal layer 12 corresponding to the sub-pixel of the display panel 1. In this way, the light emitting state of the first chip 221 and the second chip 222 is adjusted by the control unit 3, and the opening or closing state of the liquid crystal layer 12 of each sub-pixel in the display panel 1 is controlled at the same time, so as to realize fine adjustment of brightness and color.

[0065] In this way, by setting the first chip 221 capable of emitting light of the first color, the light of the first color can directly pass through the first sub-pixel 1331 to display the first color without being absorbed by the first sub-pixel 1331, so as to reduce the loss; and the light emitted by the first chip 221 without being absorbed can also be mixed with the second sub-pixel 1332 and the third sub-pixel 1333, so as to realize wide color gamut display and improve color saturation. In addition, the control unit 3 can also control the white light emitted by the second chip 222 to pass through the first sub-pixel 1331, so as to enhance the display brightness. On the other hand, compared with the full-color RGB three-color LED chip, the cost of the dual-color LED chip is lower, which further reduces the manufacturing cost of the display device.

[0066] In specific embodiments, the light of the first color can be red light; the light of the second color can be one of blue light and green light, and the light of the third color can be the other of blue light and green light. That is, the first chip 221 is a red light LED chip, the first sub-pixel 1331 is a red sub-pixel, the second sub-pixel 1332 is one of a blue sub-pixel and a green sub-pixel, and the third sub-pixel 1333 is the other of a blue sub-pixel and a green sub-pixel.

[0067] Of course, in other embodiments, the light of the first color can also be blue light; the light of the second color can be one of red light and green light, and the light of the third color can be the other of red light and green light; that is, the first chip 221 is a blue light LED chip, and the first sub-pixel 1331 is a blue sub-pixel.

[0068] Alternatively, the light of the first color is green light; the light of the second color is one of red light and blue light, and the light of the third color is the other of red light and blue light; that is, the first chip 221 is a green light LED chip, and the first sub-pixel 1331 is a green sub-pixel.

[0069] The following embodiments of the present application are described by taking the first chip 221 as a red light LED chip, the light of the first color as red light, the light of the second color as green light, and the light of the third color as blue light as examples.

[0070] In combination Figure 2a With Figure 4In specific embodiments, the control unit 3 can be configured to control the first chip 221 and the second chip 222 to emit light in time sequence; it can be understood that the time interval of the light emission of the first chip 221 and the second chip 222 is very short, so as to utilize the visual persistence effect of human eyes, and mix out full-color images by synchronizing the time sequence of high-speed switching backlight color and liquid crystal switching. Each frame of the display panel 1 is composed of two first color frames and second color frames emitted in different time sequences.

[0071] Specifically, the control unit 3 can control the opening of the liquid crystal layer 12 corresponding to the first sub-pixel 1331 while controlling the light emission of the first chip 221, so that the light of the first color emitted by the first chip 221 passes through the first sub-pixel 1331 to form the first color of the emitted light, thereby forming the first color frame displayed by the first sub-pixel 1331.

[0072] The control unit 3 can also control the opening of the liquid crystal layer 12 corresponding to the second sub-pixel 1332 and / or the third sub-pixel 1333 while controlling the light emission of the second chip 222, so that the white light emitted by the second chip 222 passes through the second sub-pixel 1332 to form the second color of the emitted light, and / or the white light emitted by the second chip 222 passes through the third sub-pixel 1333 to form the third color of the emitted light, so that the second color of the emitted light and / or the third color of the emitted light in the same time sequence form the second color frame displayed by the second sub-pixel 1332 and / or the third sub-pixel 1333 through the principle of spatial color mixing.

[0073] For example, the control unit 3 controls the opening of the liquid crystal layer 12 corresponding to the first sub-pixel 1331 while controlling the first chip 221 to emit red light, so that the red light passes through the first sub-pixel 1331 to form the first color frame, and controls the deflection angle of the liquid crystal molecules corresponding to the first sub-pixel 1331 to control the brightness of the first color frame.

[0074] Then, the control unit 3 can control the opening of the liquid crystal layer 12 corresponding to the second sub-pixel 1332 while controlling the second chip 222 to emit white light, so that the white light passes through the second sub-pixel 1332 to form green emitted light, and controls the deflection angle of the liquid crystal molecules corresponding to the second sub-pixel 1332 to control the brightness of the green emitted light; and the control unit 3 can also control the opening of the liquid crystal layer 12 corresponding to the third sub-pixel 1333 at the same time, so that the white light passes through the third sub-pixel 1333 to form blue emitted light, and controls the deflection angle of the liquid crystal molecules corresponding to the third sub-pixel 1333 to control the brightness of the blue emitted light. The green emitted light and / or the blue emitted light are mixed to form the second color frame.

[0075] It can be understood that the liquid crystal layer 12 corresponding to the second sub-pixel 1332 and the liquid crystal layer 12 corresponding to the third sub-pixel 1333 can be opened simultaneously or individually. The specific opening manner is determined according to the second color frame required by different display pictures. That is, the second color frame can be formed by mixing the second color light and the third color light, or can be formed by the second color light alone, or can be formed by the third color light alone.

[0076] In this way, the first color frame and the second color frame with different time sequences and time sequence adjacent to each other form a complete color display picture through the time sequence color mixing principle (i.e. the persistence of vision characteristics of the human eye). By combining spatial color mixing and time sequence color mixing, the mixing of red, green and blue colors is realized, the utilization rate of the backlight is improved, the brightness and contrast of the display panel 1 are improved, and the energy consumption is further reduced, and the energy efficiency ratio is improved.

[0077] By using spatial color mixing and time sequence color mixing, more colorful performance can be achieved in different scenes. For example, in some scenes requiring high brightness, time sequence color mixing can be used more to improve brightness; and in scenes requiring high color stability, spatial color mixing can be relied on to ensure the accuracy of the color.

[0078] In addition, this combination mode can also adapt to different application requirements. For example, in some professional fields with high color restoration requirements, such as design, photography, etc., more accurate color performance can be achieved by finely adjusting the proportion of spatial color mixing and time sequence color mixing. In some consumer-grade electronic products, appropriate color mixing methods can be selected according to the balance between cost and performance to meet the needs of different users.

[0079] Further, in specific embodiments, the control unit 3 can also control the first chip 221 and the second chip 222 to emit light at the same time. In combination with the above Figure 2a With Figure 4 When the display panel 1 displays the first color frame, the control unit 3 can be used to control the opening of the liquid crystal layer 12 corresponding to the first sub-pixel 1331 while the first chip 221 and the second chip 222 emit light at the same time, so that the first color light emitted by the first chip 221 forms the first color light through the first sub-pixel 1331, and the white light emitted by the second chip 222 forms the enhanced light through the first sub-pixel 1331, so that the white light emitted by the second chip 222 forms the enhanced light through the first sub-pixel 1331, thereby enhancing the display brightness of the first display frame, reducing energy consumption, and further improving the energy efficiency ratio.

[0080] That is, the first color frame can also be formed by mixing the first color light and the white light. Specifically, the control unit 3 controls the first chip 221 to emit red light, controls the second chip 222 to emit white light, controls the liquid crystal layer 12 corresponding to the first sub-pixel 1331 to be turned on at the same time, so that the red light transmits through the first sub-pixel 1331 to form red light, and the white light transmits through the first sub-pixel 1331 to form enhanced light; the red light meets the enhanced light to form the first color frame.

[0081] In specific embodiments, when the display panel 1 displays the second color frame, the control unit 3 can also be configured to control the first chip 221 not to emit light, control the second chip 222 to emit light, and control the liquid crystal layer 12 corresponding to the first sub-pixel 1331 to be turned on at the same time, so that the white light emitted by the second chip 222 transmits through the first sub-pixel 1331 to form enhanced light, thereby enhancing the display brightness of the second display frame, reducing energy consumption, and further improving the energy efficiency ratio.

[0082] Specifically, the control unit 3 controls the first chip 221 not to emit light, controls the second chip 222 to emit light, and controls the liquid crystal layer 12 corresponding to the second sub-pixel 1332 and / or the third sub-pixel 1333 to be turned on at the same time, so that the white light emitted by the second chip 222 transmits through the second sub-pixel 1332 to form the second color light, and / or the white light emitted by the second chip 222 transmits through the third sub-pixel 1333 to form the third color light, so that the second color light and / or the third color light at the same time sequence form the second color frame with the white light transmitting through the first sub-pixel 1331, thereby enhancing the brightness of the second color frame.

[0083] Similarly, the second color frame can be formed by mixing the second color light, the third color light, and the white light; the second color frame can also be formed by mixing the second color light and the white light; or the second color frame can also be formed by mixing the third color light and the white light.

[0084] Specifically, the control unit 3 controls the liquid crystal layer 12 corresponding to the first sub-pixel 1331 to be turned on at the same time when controlling the second chip 222 to emit white light, so that the white light transmits through the first sub-pixel 1331 to form enhanced light, and controls the deflection angle of the liquid crystal molecules corresponding to the first sub-pixel 1331 to control the brightness of the enhanced light.

[0085] The control unit 3 can also simultaneously control the liquid crystal layer 12 corresponding to the second sub-pixel 1332 to open, allowing white light to pass through the second sub-pixel 1332 to form green emitted light, and control the deflection angle of the liquid crystal molecules corresponding to the second sub-pixel 1332 to control the brightness of the green emitted light. The control unit 3 can also simultaneously control the liquid crystal layer 12 corresponding to the third sub-pixel 1333 to open, allowing white light to pass through the third sub-pixel 1333 to form blue emitted light, and control the deflection angle of the liquid crystal molecules corresponding to the third sub-pixel 1333 to control the brightness of the blue emitted light. The green emitted light and / or the blue emitted light mix with the enhancement light to form a second color frame.

[0086] Thus, by simultaneously utilizing the light emitted from the first chip 221 and the second chip 222, and combining this with precise control of the liquid crystal layer 12, higher display brightness and richer color performance can be achieved. Specifically, the enhancement of white light makes the emitted light of the first color, the second color, and the third color brighter and more saturated, thereby improving the overall display quality. Furthermore, this design also improves the energy efficiency of the display panel 1. By rationally allocating the emission time or intensity of the two chips, superior display effects can be achieved without significantly increasing power consumption.

[0087] Combination Figure 2a and Figure 4 In a specific embodiment, when the display panel 1 displays a weak white light image, the control unit 3 can be used to control the first chip 221 to not emit light, and control the second chip 222 to emit light, while controlling the liquid crystal layer 12 corresponding to the first sub-pixel 1331 to open and controlling the liquid crystal layer 12 corresponding to the second sub-pixel 1332 and the third sub-pixel 1333 to close, so that the white light emitted by the second chip 222 only passes through the first sub-pixel 1331 and forms the first white light, forming a specific weak white light effect to meet the display requirements.

[0088] It is understandable that when a traditional LCD panel 1 displays a white image, the white light emitted by the LED chip passes through red, green, and blue photoresists to form red, green, and blue emitted light, which then mixes to form white light. This white light is absorbed and lost by the photoresists, resulting in a significant reduction in brightness. In contrast to this traditional display method, this embodiment controls the second chip 222 to emit light and controls the liquid crystal layer 12 corresponding to the first sub-pixel 1331 to open when displaying a white image. This allows white light to directly pass through the first sub-pixel 1331 to form white emitted light, thereby increasing the brightness of the white image and effectively reducing the energy consumption of weak white light images.

[0089] Further, when the display panel 1 displays a strong white light picture, the control unit 3 can also be configured to control the first chip 221 and the second chip 222 to emit light at the same time, control the liquid crystal layer 12 corresponding to the first sub-pixel 1331 to be turned on, so that the white light emitted by the second chip 222 passes through the first sub-pixel 1331 to form the first white light.

[0090] The first color light emitted by the first chip 221 passes through the first sub-pixel 1331 to form the first color light. At the same time, the control unit 3 can also control the liquid crystal layer 12 corresponding to the second sub-pixel 1332 and the liquid crystal layer 12 corresponding to the third sub-pixel 1333 to be turned on, so that the white light emitted by the second chip 222 passes through the second sub-pixel 1332 to form the second color light, and the white light emitted by the second chip 222 passes through the third sub-pixel 1333 to form the third color light. Wherein, the first color light passing through the first sub-pixel 1331, the second color light passing through the second sub-pixel 1332 and the third color light passing through the third sub-pixel 1333 are mixed to form the second white light.

[0091] In this way, the first white light and the second white light are formed by two different ways, so as to further improve the brightness of the white picture, form a specific strong white light effect, and meet the display requirements. This way maximizes the use of light emitted by the first chip 221 and the second chip 222, and effectively reduces the energy consumption of the strong white light picture.

[0092] Specifically, the control unit 3 controls the first chip 221 to emit red light, controls the second chip 222 to emit white light at the same time, controls the liquid crystal layer 12 corresponding to the first sub-pixel 1331 to be turned on, so that the white light passes through the first sub-pixel 1331 to form the first white light, and the red light passes through the first sub-pixel 1331 to form the red light. The control unit 3 controls the liquid crystal layer 12 corresponding to the second sub-pixel 1332 to be turned on, so that the white light passes through the second sub-pixel 1332 to form the green light; and controls the liquid crystal layer 12 corresponding to the third sub-pixel 1333 to be turned on, so that the white light passes through the third sub-pixel 1333 to form the blue light. Wherein, the red light, the green light and the blue light are further mixed to form the second white light.

[0093] In specific embodiments, the backlight module 2 can also include optical film layers, diffusion plates and other structural members. The specific structures and functions of these structural members are the same as or similar to those in the prior art, and specific reference can be made to the prior art, which will not be described here.

[0094] The application provides a display device, which comprises a backlight module 2, a display panel 1 and a control unit 3; wherein the backlight module 2 comprises a back plate 21 and a lamp plate 22 arranged on the back plate 21, and the lamp plate 22 comprises a plurality of first chips 221 for emitting light of a first color and a plurality of second chips 222 for emitting white light. The display panel 1 is arranged on the light-emitting side of the backlight module 2. The control unit 3 is electrically connected with the backlight module 2 and the display panel 1 respectively, for controlling the first chips 221 and / or the second chips 222 to emit light, and controlling the opening or closing of the liquid crystal layer 12 corresponding to the sub-pixel of the display panel 1. The display device is provided with the first chips 221 capable of emitting light of the first color, so as to cooperate with the first sub-pixel 1331, so that the light of the first color can directly penetrate the first sub-pixel 1331 to display the first color without being absorbed by the first sub-pixel 1331, so as to reduce the loss; and the light emitted by the first chip 221 without being absorbed can also be mixed with the second sub-pixel 1332 and the third sub-pixel 1333, so as to realize wide color gamut display and improve the color saturation. In addition, the control unit 3 can also control the white light emitted by the second chip 222 to penetrate the first sub-pixel 1331, so as to enhance the display brightness. On the other hand, compared with the RGB three-color LED chip, the cost of the double-color LED chip is lower, and the manufacturing cost of the display device is further reduced.

[0095] The application also provides a preparation method of the display device, comprising:

[0096] Step S1: providing the backlight module 2.

[0097] Specifically, the backlight module 2 can comprise a back plate 21 and a lamp plate 22 arranged on the back plate 21; and the lamp plate 22 is integrated with two different types of light-emitting diode chips, specifically comprising first chips 221 for emitting light of a first color and second chips 222 for emitting white light. The first chips 221 and the second chips 222 are respectively electrically connected with the control unit 3.

[0098] Step S2: providing the display panel 1.

[0099] Specifically, the display panel 1 comprises a plurality of pixels arranged in a two-dimensional array, and each pixel comprises a first sub-pixel 1331, a second sub-pixel 1332 and a third sub-pixel 1333; wherein the first sub-pixel 1331 allows the light of the first color and the white light to penetrate, the second sub-pixel 1332 only allows the light of the second color to penetrate, and the third sub-pixel 1333 only allows the light of the third color to penetrate.

[0100] In the specific implementation process, the step of providing the display panel 1 can specifically comprise:

[0101] Step S21: providing a first glass plate 131.

[0102] Step S22: depositing a second color photoresist material and a third color photoresist material on the one side surface of the first glass plate 131 in sequence to form the color film substrate 13.

[0103] In the implementation process, a mask process can be used to form a patterned black matrix on the surface of the first glass plate 131, and then the first sub-pixel 1331, the second sub-pixel 1332 and the third sub-pixel 1333 are sequentially formed in the region surrounded by the black matrix in the grid structure.

[0104] The first sub-pixel 1331 can be a photoresist layer 133 hollow part, the second sub-pixel 1332 can be a second color photoresist layer 133, and the third sub-pixel 1333 can be a third color photoresist layer 133. The photoresist layer 133 hollow part, the second color photoresist layer 133 and the third color photoresist layer 133 constitute the photoresist layer 133.

[0105] Before the step of forming the first sub-pixel 1331, the second sub-pixel 1332 and the third sub-pixel 1333, it can also include depositing a transparent conductive material on the one side surface of the first glass plate 131 to form a first transparent conductive layer 132.

[0106] After the step of forming the first sub-pixel 1331, the second sub-pixel 1332 and the third sub-pixel 1333, it can also include depositing a transparent conductive material on the side surface of the photoresist layer 133 away from the first glass plate 131 to form a second transparent conductive layer 134.

[0107] Of course, in other embodiments, the first sub-pixel 1331 can also be a transparent photoresist layer 133; the second sub-pixel 1332 is a second color photoresist layer 133, and the third sub-pixel 1333 is a third color photoresist layer 133. The transparent photoresist layer 133, the second color photoresist layer 133 and the third color photoresist layer 133 constitute the photoresist layer 133.

[0108] In these embodiments, after the step of forming the first sub-pixel 1331, the second sub-pixel 1332 and the third sub-pixel 1333, it can also include depositing a transparent conductive material on the side surface of the photoresist layer 133 away from the first glass plate 131 to form a transparent conductive layer 135.

[0109] Step S23: providing an array substrate 11.

[0110] Step S24: bonding the array substrate 11 and the color film substrate 13 and filling liquid crystal to form a liquid crystal layer 12.

[0111] Step S3: assembling the backlight module 2 and the display panel 1 to form a display device.

[0112] The above merely provides the implementation of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made according to the content of the present application and the accompanying drawings, is also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that, a plurality of pixels arranged in a two-dimensional array, each of the pixels comprising a first sub-pixel, a second sub-pixel and a third sub-pixel; wherein the first sub-pixel allows light of a first color and white light to pass through, the second sub-pixel only allows light of a second color to pass through, and the third sub-pixel only allows light of a third color to pass through.

2. The display panel of claim 1, characterized in that, the display panel comprises an array substrate, a liquid crystal layer and a color film substrate; the color film substrate comprises a first glass plate, a first transparent conductive layer and a photoresist layer which are sequentially stacked; the photoresist layer comprises a photoresist layer hollow part, a second color photoresist layer and a third color photoresist layer; the first sub-pixel is the photoresist layer hollow part; the second sub-pixel is the second color photoresist layer, and the third sub-pixel is the third color photoresist layer.

3. The display panel of claim 2, characterized in that, the color film substrate further comprises a second transparent conductive layer, the second transparent conductive layer covers one side of the photoresist layer away from the first glass plate; in the photoresist layer hollow part, the second transparent conductive layer and the first transparent conductive layer are in laminated contact.

4. The display panel of claim 1, characterized in that, the display panel comprises an array substrate, a liquid crystal layer and a color film substrate; the color film substrate comprises a first glass plate, a photoresist layer and a transparent conductive layer which are sequentially stacked; the photoresist layer comprises a transparent photoresist layer, a second color photoresist layer and a third color photoresist layer; the first sub-pixel is the transparent photoresist layer; the second sub-pixel is the second color photoresist layer, and the third sub-pixel is the third color photoresist layer.

5. A display device, characterized by comprising: including: a backlight module, the backlight module comprising a back plate and a lamp plate arranged on the back plate, the lamp plate comprising a plurality of first chips for emitting light of a first color and a plurality of second chips for emitting white light; a display panel arranged on the light emitting side of the backlight module; the display panel is the display panel of any one of claims 1-4; a control unit electrically connected with the backlight module and the display panel respectively, for controlling the first chip and / or the second chip to emit light, and controlling the opening or closing of the liquid crystal layer corresponding to the sub-pixel of the display panel.

6. The display device of claim 5, characterized in that, the control unit is configured to: control the first chip and the second chip to emit light in time sequence, and control the opening of the liquid crystal layer corresponding to the first sub-pixel at the same time when the first chip emits light, so that the light of the first color emitted by the first chip passes through the first sub-pixel to form the first color of the emitted light; control the opening of the liquid crystal layer corresponding to the second sub-pixel and / or the third sub-pixel at the same time when the second chip emits light, so that the white light emitted by the second chip passes through the second sub-pixel to form the second color of the emitted light, and / or the white light emitted by the second chip passes through the third sub-pixel to form the third color of the emitted light.

7. The display device of claim 5, wherein the control unit is configured to control the first chip to not emit light, and control the second chip to emit light while: controlling the liquid crystal layer corresponding to the first sub-pixel to be open, so that the white light emitted by the second chip forms enhanced light through the first sub-pixel; and controlling the liquid crystal layer corresponding to the second sub-pixel and / or the third sub-pixel to be open, so that the white light emitted by the second chip forms the second color of light through the second sub-pixel and / or the third color of light through the third sub-pixel.

8. The display device of claim 5, wherein the control unit is configured to control the first chip and the second chip to emit light while: controlling the liquid crystal layer corresponding to the first sub-pixel to be open, so that the first color of light emitted by the first chip forms the first color of light through the first sub-pixel, and the white light emitted by the second chip forms enhanced light through the first sub-pixel.

9. The display device of claim 5, wherein the control unit is configured to control the first chip to not emit light, and control the second chip to emit light while: controlling the liquid crystal layer corresponding to the first sub-pixel to be open, and controlling the liquid crystal layer corresponding to the second sub-pixel and the third sub-pixel to be closed, so that the white light emitted by the second chip forms the first white light through the first sub-pixel.

10. The display device of claim 5, wherein the control unit is configured to control the first chip and the second chip to emit light while: controlling the liquid crystal layer corresponding to the first sub-pixel to be open, so that the white light emitted by the second chip forms the first white light through the first sub-pixel, and the first color of light emitted by the first chip forms the first color of light through the first sub-pixel; controlling the liquid crystal layer corresponding to the second sub-pixel and the liquid crystal layer corresponding to the third sub-pixel to be open, so that the white light emitted by the second chip forms the second color of light through the second sub-pixel, and the third color of light through the third sub-pixel, and the first color of light, the second color of light, and the third color of light are mixed to form the second white light. ​ ​ ​

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