Flexible color display screen

Abstract

The invention discloses a flexible color display screen which comprises a backlight module, a shading support, a diffusion film, a color mixing piece and a front color filtering substrate, the backlight module is arranged in the shading support, the shading support is covered with the diffusion film, the color mixing piece and the front color filtering substrate are sequentially arranged above the diffusion film, the backlight module comprises a flexible main control panel, and the flexible main control panel is arranged on the shading support. A plurality of point light sources are arranged on the flexible main control board; the color mixing sheet comprises six pixel points of red, yellow, blue, orange, purple and black, and is used for converting white light into various colors; and the front color filtering substrate adopts semitransparent colors including black, silver and electroplating color semitransparent color, and is used for keeping the same color of the screen when the screen does not display. A liquid crystal panel required by an LCD display screen is not needed, only one layer of color mixing sheet is needed, the final effect of converting white light into various colors can be achieved, the adopted resolution ratio can reach 800dpi and 1210dpi, and the adopted highest resolution ratio exceeds the industrial standard by four times.

Description

Technical Field

[0001] The present invention relates to the technical field of color display, and in particular to a flexible color display screen. Background Art

[0002] The basic principle of color display screen is to fill liquid crystal material between two parallel plates, and change the arrangement of molecules inside the liquid crystal material by voltage to achieve the purpose of light shielding and light transmission to display images of varying depths and staggered patterns. As long as a filter layer of RGB (red, yellow, and blue) three primary colors is added between the two plates, color images can be displayed. The light-emitting principle of color display screen mainly relies on the backlight layer, that is, Figure 2 The backlight module 201 is usually composed of a large number of LED backlights. It has only one function, which is to display white light. However, white light cannot form an image, so it is necessary to add a colored film, i.e., a color filter 203, to the white backlight module 201. There is also a glass substrate 204 outside the color filter 203. The white backlight can display color after penetrating the color filter 203. At the same time, a control valve, i.e., a liquid crystal panel 202, is added between the backlight module 201 and the color filter 203. The liquid crystal panel 202 can control the degree of opening and closing by changing the voltage to adjust the amount of white light or the ratio of red, green and blue (i.e., the colors usually used in color screens).

[0003] However, this LCD color display solution has a long production process, complex structure, high cost, and the following problems:

[0004] 1. The liquid crystal layer cannot be completely closed. If the LCD displays black, some light will pass through the color layer, so the black of the LCD is actually a gray mixed with white and black;

[0005] 2. LCD has a thicker overall product due to the presence of a liquid crystal layer and a glass substrate. Also, due to the presence of the liquid crystal layer and the glass substrate, the LCD screen cannot bend significantly.

[0006] 3. LCDs cannot fully photosynthesize the liquid crystal layer, so all blacks are not pure black, and it is difficult to achieve high contrast.

[0007] 5. When the LCD lights up, the entire backlight layer is turned on, so the LCD is either fully on or fully off;

[0008] 6. No matter what color the LCD displays, the backlight must be fully lit, which consumes more electricity;

[0009] 7: The color reproduction of the three primary colors RGB (red, yellow, blue) is insufficient. The color saturation and vividness cannot be satisfied.

[0010] 8. The concept of grayscale response time comes into being. It takes time for the pixels of LCD to change from white light to various colors. The mixing process sometimes causes the response time to be too long. When the picture is lit, the pixel mixing is delayed, which causes a color display delay, and visual ghosting will appear. Ghosting greatly affects the visual perception. Summary of the invention

[0011] Based on the technical problems existing in the background technology, according to the fact that natural light is composed of seven colors: red, orange, yellow, green, cyan, blue and purple, the present invention proposes a flexible color display screen.

[0012] A flexible color display screen proposed in the present invention comprises a backlight module, a light shielding bracket, a diffusion film, a color mixing sheet and a front color filter substrate. The backlight module is arranged in the light shielding bracket, the light shielding bracket is covered with the diffusion film, and the color mixing sheet and the front color filter substrate are arranged in sequence above the diffusion film, wherein:

[0013] The backlight module comprises a flexible main control board, on which a plurality of point light sources are arranged;

[0014] The color mixing film contains six kinds of pixels: red, orange, yellow, cyan, blue and black, which are used to convert white light into various colors;

[0015] The front color filter substrate adopts a semi-transparent color, including black, silver, and electroplated semi-transparent color, which is used to keep the screen in the same color when the screen is not displayed.

[0016] Preferably, the color mixing sheet is printed with 0.012 mm pixels of the three primary colors of red, yellow and blue and six kinds of pixels of orange, cyan and black by electrostatic printing, so as to achieve the purpose of light shielding and light transmission to display images.

[0017] Preferably, on the basis of 0.012mm red, yellow, blue primary colors and 6 kinds of pixel points of orange, purple and black, red, yellow, blue primary colors and 6 kinds of pixel points of orange, cyan and black are arranged according to the 3D viewing angle through software for 3D naked eye display.

[0018] Preferably, the three colors of red, yellow and blue are adjusted to be distributed in a frequency modulation or amplitude modulation manner to present 2.6 million colors; or the six colors of red, yellow, blue, orange, cyan and black are adjusted to be distributed in a frequency modulation or amplitude modulation manner to present 16 million colors, with a resolution of 800DPI and 1210DPI.

[0019] Preferably, the point light sources in the backlight module can be lighted individually to individually display pixel points in certain areas.

[0020] Preferably, black pixels are added to the red, orange, yellow, cyan and blue lights to increase the contrast between light and dark, so that the highlight part is brighter and the low light part is darker.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention does not require a liquid crystal panel required for an LCD display screen, but only requires a layer of color mixing film to achieve the final effect of converting white light into various colors;

[0023] 2. The present invention can achieve a pure black effect directly by turning off the backlight module. At the same time, it is not limited to pure black and the front color filter substrate. Various semi-transparent, white, silver and other substrates can be used to achieve a completely integrated effect with the display bracket, which is more suitable for market demand.

[0024] 3. Thickness / bendability: The present invention makes it easier to make the overall product thinner. A thinner screen allows the product design to accommodate more components to enhance the experience of other parts, and the product can be bent to a large extent at will.

[0025] 4. Color contrast: refers to the ratio of white to black. The higher the contrast, the darker the color of the picture. The present invention can make the black completely opaque, that is, part of the light in the black area cannot pass through. At this time, the black threshold can completely reach 0, and the contrast can completely reach the theoretical value.

[0026] 5. Independent lighting: Each pixel point in each area of ​​the present invention is independent, so the backlight module can light up some pixels in certain areas separately. This feature can be used to achieve a very convenient function - screen-off reminder. After the screen is turned off, several pixels in several areas are lit up at low brightness to display certain functions. By clicking the low-brightness function, the screen can be lit up. In terms of power consumption, the present invention can achieve independent operation of regional pixels through the control of the backlight module, so that the pixels that should be lit are bright, the pixels that should be dark are dark, and the pixels that should be off are off, so the present invention is more power-saving;

[0027] 6. Screen response time: The color of the screen is displayed by the pixels, and the screen content cannot just switch between the blackest and the whitest, but a colorful picture, or different levels of depth, which are all grayscale conversions. The conversion speed and torsion angle of the liquid crystal molecules are determined by the magnitude of the applied voltage. From full black to full white, the liquid crystal molecules face the largest torsion angle, and a larger voltage needs to be applied. At this time, the liquid crystal molecules torsion speed is faster. However, it is difficult to implement grayscale switching of different brightness, and all the images seen on the screen are the result of grayscale changes. Therefore, the measurement method of black and white response can no longer correctly express the actual meaning. For this reason, the present invention does not delay anything. After the white light passes through the color mixing film directly, the color can be directly output.

[0028] 7. Pixel density: Pixels are the most basic elements of the screen. Therefore, the more pixels there are when the screen area remains unchanged, the higher the screen clarity. For the human eye, the resolution corresponds to the corresponding PPI on the screen, that is, how many pixels are there in one inch, which is 2.54 cm. The screen resolution of a 6-inch FHD (full HD) mobile phone is about 395ppi, while the resolution used in the present invention can be as high as 800dpi and 1210dpi. The highest resolution that can be used in the present invention has exceeded the industry standard by 4 times. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is an exploded view of the structure of the flexible color display screen of the present invention;

[0030] Figure 2 It is a structural exploded diagram of an existing color display screen;

[0031] Figure 3 This is a color contrast effect diagram;

[0032] Figure 4 This is a resolution comparison chart. DETAILED DESCRIPTION

[0033] The present invention will be further explained below in conjunction with specific embodiments.

[0034] like Figure 1 As shown, this embodiment proposes a flexible color display screen, including a backlight module 1, a shading bracket 2, a diffusion film 3, a color mixing sheet 4 and a front color filter substrate 5. The backlight module 1 is arranged in the shading bracket 2, and the diffusion film 3 is covered on the shading bracket 2. The color mixing sheet 4 and the front color filter substrate 5 are arranged in sequence above the diffusion film 3, wherein the backlight module 1 includes a flexible main control board 11, and a plurality of point light sources 12 are arranged on the flexible main control board 11; the color mixing sheet includes six kinds of pixel points of red, yellow, blue, orange, purple and black, which are used to convert white light into various colors; the front color filter substrate adopts translucent colors, including black, silver, electroplated color and semi-transparent colors, which are used to keep the screen in the same color when the screen is not displayed.

[0035] The color mixing sheet of this embodiment is printed with 0.012mm red, yellow, blue primary colors and 6 kinds of orange, cyan, and black pixel points by electrostatic printing to achieve the purpose of light shielding and light transmission to display images. Alternatively, on the basis of 0.012mm red, yellow, blue primary colors and 6 kinds of orange, purple, and black pixel points, red, yellow, blue primary colors and 6 kinds of orange, cyan, and black pixel points are arranged according to the 3D viewing angle by software for 3D naked eye display.

[0036] By adjusting the distribution of red, yellow and blue colors in a frequency modulation or amplitude modulation manner, it is used to present 2.6 million colors; or by adjusting the distribution of red, yellow, blue, orange, cyan and black colors in a frequency modulation or amplitude modulation manner, it is used to present 16 million colors, with a resolution of 800DPI and 1210DPI. Black pixels are added to the red, orange, yellow, cyan and blue lights to increase the contrast between light and dark colors, making the highlight brighter and the low light darker.

[0037] Among them, frequency modulation uses the method of keeping the amplitude (size) of the micro-dots fixed, and expressing the depth of the image through the change of the spatial frequency (interval) of the dots, and the dots are discrete. Within a unit area, the size of the dots remains unchanged, and the density of the image is reflected by the density of the dots. A high density reflects a high image density, and a sparse dot reflects a low image density.

[0038] AM means that the spatial frequency of dots remains unchanged, and the depth of the image is expressed by the change of dot size, and the dots are in a clustered state. The number of dots per unit area remains unchanged, and the depth of the image tone is reflected by the dot size. The dark tone area has a large dot area and a small blank space; the light tone area has a small dot area and a large blank space.

[0039] The flexible color display screen provided in this embodiment can realize the following functions:

[0040] 1. The present invention does not require a liquid crystal panel required for an LCD display screen, but only requires a layer of color mixing film to achieve the final effect of converting white light into various colors;

[0041] 2. The present invention can achieve a pure black effect directly by turning off the backlight module. At the same time, it is not limited to pure black and the front color filter substrate. Various semi-transparent, white, silver and other substrates can be used to achieve a completely integrated effect with the display bracket, which is more suitable for market demand.

[0042] 3. Thickness / bendability: The present invention makes it easier to make the overall product thinner. A thinner screen allows the product design to accommodate more components to enhance the experience of other parts, and the product can be bent to a large extent at will.

[0043] 4. Color contrast: refers to the ratio of white to black. The higher the contrast, the darker the color of the picture. The present invention can make black completely opaque, that is, part of the light in the black area cannot pass through. At this time, the black threshold can completely reach 0, and the contrast can completely reach the theoretical value, such as Figure 3 shown.

[0044] 5. Independent lighting: Each pixel of the present invention is independent, so some pixels can be lit up separately through the backlight module. This feature can be used to achieve a very convenient function - screen-off reminder. After the screen is turned off, several pixels are lit up at low brightness to display certain functions. By clicking the low-brightness function, the screen can be lit up. In terms of power consumption, the present invention can achieve independent work of pixels through the control of the backlight module, so that the pixels that should be lit are bright, the pixels that should be dark are dark, and the pixels that should be turned off are turned off, so the present invention is more power-saving;

[0045] 6. Screen response time: The color of the screen is displayed by the pixels, and the screen content cannot just switch between the blackest and the whitest, but a colorful picture, or different levels of depth, which are all grayscale conversions. The conversion speed and torsion angle of the liquid crystal molecules are determined by the magnitude of the applied voltage. From full black to full white, the liquid crystal molecules face the largest torsion angle, and a larger voltage needs to be applied. At this time, the liquid crystal molecules torsion speed is faster. However, it is difficult to implement grayscale switching of different brightness, and all the images seen on the screen are the result of grayscale changes. Therefore, the measurement method of black and white response can no longer correctly express the actual meaning. For this reason, the present invention does not delay anything. After the white light passes through the color mixing film directly, the color can be directly output.

[0046] 7. Pixel density: Pixels are the most basic elements of the screen. Therefore, the more pixels there are when the screen area remains unchanged, the higher the screen clarity. For the human eye, the resolution corresponds to the corresponding PPI on the screen, that is, how many pixels are there in one inch, which is 2.54 cm. The screen resolution of a 6-inch FHD (full HD) mobile phone is about 395ppi, while the resolution used in this invention can be as high as 800dpi and 1210dpi. When the concept of DPI is used on computer screens, it is generally called PPI (Pixels Per Inch). The default resolution PPI of computer system screens is usually 72ppi, and the general resolution of printed materials is 300dpi. Figure 4 The pixel comparison is of common resolution; the highest resolution that can be adopted by the present invention exceeds the industry standard by 4 times.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flexible color display screen, characterized in that: The invention comprises a backlight module, a light shielding bracket, a diffusion film, a color mixing sheet and a front color filter substrate. The backlight module is arranged in the light shielding bracket, the light shielding bracket is covered with the diffusion film, and the color mixing sheet and the front color filter substrate are arranged on the diffusion film in sequence, wherein: The backlight module comprises a flexible main control board, on which a plurality of point light sources are arranged; The color mixing film contains six kinds of pixels: red, orange, yellow, cyan, blue and black, which are used to convert white light into various colors; The front color filter substrate adopts a semi-transparent color, including black, silver, and electroplated semi-transparent color, which is used to keep the screen in the same color when the screen is not displayed.

2. The flexible color display screen according to claim 1, characterized in that: The color mixing sheet is printed with 0.012mm red, yellow, blue primary colors and six kinds of pixel points, namely orange, purple and black, by electrostatic printing to achieve the purpose of light shielding and light transmission to display images.

3. The flexible color display screen according to claim 2, characterized in that: Based on the 0.012mm red, yellow, blue primary colors and 6 kinds of pixels of orange, cyan and black, the red, yellow, blue primary colors and 6 kinds of pixels of orange, purple and black are arranged according to the 3D perspective through software for 3D naked eye display.

4. The flexible color display screen according to claim 2, characterized in that: Adjust the distribution of red, yellow and blue colors in a frequency modulation or amplitude modulation manner to present 2.6 million colors; or adjust the distribution of red, yellow, blue, orange, cyan and black colors in a frequency modulation or amplitude modulation manner to present 16 million colors, with a resolution of 800DPI and 1210DPI.

5. The flexible color display screen according to claim 1, characterized in that: The point light sources in the backlight module can be lit up individually to display pixel points in certain areas individually.

6. The flexible color display screen according to claim 1, characterized in that: The five colors of red, orange, yellow, cyan and blue are added with black pixels to increase the contrast between light and dark, making the highlight part brighter and the low light part darker.

Images