VA LCD with color polarization

Abstract

The present invention discloses a VA liquid crystal display screen with color polarization, comprising a liquid crystal display layer and a backlight layer; a color transparent ink layer is added between the liquid crystal display layer and the backlight layer, and the color transparent ink layer presents the same color as a whole, or presents different colors in different areas. By adding a color transparent ink layer between the liquid crystal display layer and the white backlight layer, a traditional black and white VA liquid crystal display screen is transformed into a local color VA liquid crystal display screen. The color transparent ink layer is arranged between two layers of polarizers, so that the color transparent ink can be prevented from falling off due to scratches during assembly and testing, or from discoloration under high temperature and high humidity conditions.

Description

Technical Field

[0001] The invention relates to a liquid crystal display screen, in particular to a VA liquid crystal display screen with color polarization. Background Art

[0002] Compared with TN LCD, VA (Vertical Alignment) LCD has the characteristics of high contrast and wide viewing angle, and is used in mid-to-high-end devices, such as car display screens, audio display screens, and high-end instrument display screens. The traditional black and white VA LCD screen is mainly composed of a liquid crystal display layer and a white backlight layer; the liquid crystal display layer displays black background and white text under white backlight. However, a simple black background and white text display screen is not suitable for the display requirements of mid-to-high-end devices. For example, some devices require the LCD screen to display other colors, such as the entire display screen as a whole. When different colors need to be displayed in different areas of the display screen, the traditional black and white VA LCD screen is powerless. For this reason, the current common practice is to achieve this by changing the luminous color of the backlight layer. Although it is relatively easy to change the display color of the display screen as a whole, that is, in the case of large-area color display, it is relatively difficult to change the display color of the display screen locally, especially when different areas display different colors, that is, in the case of small-area color display, it is relatively difficult to achieve by changing the luminous color of the backlight layer. Summary of the invention

[0003] The present invention aims to solve the problem of color display of a VA liquid crystal display screen and provides a VA liquid crystal display screen with color polarization.

[0004] To solve the above problems, the present invention is achieved through the following technical solutions:

[0005] A VA liquid crystal display screen with color polarization comprises a liquid crystal display layer and a backlight layer; a color transparent ink layer is added between the liquid crystal display layer and the backlight layer, and the color transparent ink layer presents the same color as a whole, or presents different colors in different areas.

[0006] In the above scheme, the colored transparent ink layer is arranged between two bottom polarizers, wherein the upper surface of the upper bottom polarizer is in contact with the lower surface of the liquid crystal display layer, the lower surface of the upper bottom polarizer and the upper surface of the lower bottom polarizer are in contact with the colored transparent ink layer, and the lower surface of the lower bottom polarizer is in contact with the upper surface of the backlight layer.

[0007] In the above solution, a plane polarizer is provided on the upper surface of the liquid crystal display layer.

[0008] In the above solution, the backlight layer is a white backlight layer.

[0009] Compared with the prior art, the present invention has the following characteristics:

[0010] 1. By adding a colored transparent ink layer between the liquid crystal display layer and the white backlight layer, the traditional black and white VA LCD screen can be transformed into a partial color VA LCD screen;

[0011] 2. Since the color of color transparent ink is easy to change, the display screen can display the corresponding color by using color transparent ink of different colors;

[0012] 3. Since the color transparent ink coating area is easy to control, the same display screen can be flexibly displayed in different colors in different areas by controlling the screen printing range of different colors of color transparent ink;

[0013] 4. Placing the colored transparent ink layer between two layers of polarizers can prevent the colored transparent ink from falling off due to scratches during assembly and testing, or from changing color under high temperature and high humidity conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the front view of the VA LCD display with color polarization.

[0015] Figure 2 It is a side cross-sectional diagram of a VA liquid crystal display with color polarization.

[0016] Numbers in the figure: 1, surface polarizer; 2, liquid crystal display layer; 3, upper bottom polarizer; 4, color transparent ink layer; 5, lower bottom polarizer; 6, backlight layer. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in combination with specific examples and with reference to the accompanying drawings. It should be noted that the directional terms mentioned in the examples, such as "upper", "lower", "middle", "left", "right", "front", "back", etc., are only referenced to the directions of the accompanying drawings. Therefore, the directions used are only used for illustration and are not used to limit the scope of protection of the present invention.

[0018] See also Figure 1 and 2 A VA liquid crystal display screen with color polarization is composed of a surface polarizer 1, a liquid crystal display layer, an upper bottom polarizer 3, a color transparent ink layer 4, a lower bottom polarizer 5 and a backlight layer 6 from top to bottom.

[0019] The liquid crystal display layer uses the existing structure, which is mainly composed of two layers of liquid crystal glass and liquid crystal filled in the liquid crystal box formed by these two layers of liquid crystal glass. In the initial state of VA liquid crystal, the liquid crystal molecules are arranged perpendicular to the plane of the polarizer. At this time, light cannot pass through and the screen is black. After applying voltage to the conductive plate, the liquid crystal is arranged in an inverted shape, causing light to pass through the liquid crystal with birefringence. In the initial state, the liquid crystal molecules are arranged vertically, and the backlight can hardly pass through, so a large contrast can be achieved. The voltage can control the degree of inversion of the liquid crystal molecules to achieve color and brightness adjustment.

[0020] The backlight layer 6 follows the existing structure and is mainly composed of a light source. The function of the backlight layer 6 is to provide a uniform background light source. In the present invention, the backlight layer 6 can be a white backlight layer 6, or a backlight layer 6 of other colors such as red, green or blue.

[0021] The surface polarizer 1 and the upper bottom polarizer 3 are respectively arranged on the upper and lower surfaces of the liquid crystal display layer. Their function is to convert natural light without polarization into polarized light, and control the penetration of light through the redirection of liquid crystal to produce a bright and dark display effect of the panel.

[0022] After the color transparent ink layer 4 is screen-printed on the upper surface of the lower bottom polarizer 5, the two are simultaneously arranged between the upper bottom polarizer 3 and the backlight layer 6. That is, the upper surface of the lower bottom polarizer 5 is in contact with the color transparent ink layer 4, and the lower surface of the lower bottom polarizer 5 is in contact with the upper surface of the backlight layer 6. Since the color transparent ink layer 4 is added between the backlight layer 6 and the liquid crystal display layer, the light emitted by the backlight layer 6 incident on the liquid crystal display layer changes color, thereby enabling the liquid crystal display layer to present a color effect.

[0023] After the color of the color transparent ink layer 4 is mixed with the color emitted by the backlight layer 6, different color display effects are produced. When the backlight layer 6 is a white backlight layer 6, the VA liquid crystal display screen 2 will display the color of the color transparent ink layer 4. For example, when the color transparent ink layer 4 is red, it will be displayed as red under the white backlight layer 6; when the color transparent ink layer 4 is blue, it will be displayed as blue under the white backlight layer 6. When the backlight layer 6 is a backlight layer 6 of other colors, the VA liquid crystal display screen 2 will eventually display a mixed color of the color of the color transparent ink layer 4 and the color emitted by the backlight layer 6. For example, when the color transparent ink layer 4 is green, it will be displayed as yellow under the red backlight layer 6; when the color transparent ink layer 4 is red, it will be displayed as magenta under the blue backlight layer 6.

[0024] When it is necessary to change the display color of the VA liquid crystal display screen 2 as a whole, the color transparent ink layer 4 printed on the upper surface of the lower bottom polarizer 5 can be of the same color as a whole. Under the white backlight layer 6, when the color transparent ink layer 4 is blue as a whole, the entire VA liquid crystal display screen 2 is displayed as blue; when the color transparent ink layer 4 is green as a whole, the entire VA liquid crystal display screen 2 is displayed as green.

[0025] When the display color of the VA liquid crystal display screen 2 needs to be partially changed, such as the VA liquid crystal display screen 2 needs to display different colors on different icons and areas, the color transparent ink layer 4 printed on the upper surface of the lower bottom polarizer 5 is composed of multiple colors. Under the white backlight layer 6, when the VA liquid crystal display screen 2 needs to be white as a whole, and red needs to be displayed on certain specific warning icons, it is only necessary to screen-print red transparent ink on the lower bottom polarizer 5 in the area directly below the warning icon, and screen-print colorless transparent ink on the lower bottom polarizer 5 in other areas; when the upper area of ​​the VA liquid crystal display screen 2 needs to display blue and the lower area needs to display green, it is necessary to screen-print blue transparent ink on the upper part of the lower bottom polarizer 5 and green transparent ink on the lower part.

[0026] It should be noted that although the embodiments of the present invention described above are illustrative, they are not intended to limit the present invention, and therefore the present invention is not limited to the above specific embodiments. Without departing from the principles of the present invention, any other embodiments obtained by those skilled in the art under the guidance of the present invention are deemed to be within the protection of the present invention.

Claims

1. A VA liquid crystal display screen with color polarization, comprising a liquid crystal display layer and a backlight layer (6); wherein: A color transparent ink layer (4) is provided between the liquid crystal display layer and the backlight layer (6), and the color transparent ink layer (4) presents the same color as a whole, or presents different colors in different areas; The surface polarizer (1) and the upper bottom polarizer (3) are arranged on the upper surface and the lower surface of the liquid crystal display layer respectively; after the color transparent ink layer (4) is screen-printed on the upper surface of the lower bottom polarizer (5), the two are arranged between the upper bottom polarizer (3) and the backlight layer (6) at the same time, that is, the upper surface of the lower bottom polarizer (5) is in contact with the color transparent ink layer (4), the lower surface of the lower bottom polarizer (5) is in contact with the upper surface of the backlight layer (6), and the color transparent ink layer (4) is arranged between the two layers of polarizers; Since a colored transparent ink layer (4) is provided between the backlight layer (6) and the liquid crystal display layer, the light emitted by the backlight layer (6) that is incident on the liquid crystal display layer changes color, thereby enabling the liquid crystal display layer to present a colored effect; after the color of the colored transparent ink layer (4) is mixed with the color emitted by the backlight layer (6), different color display effects are produced.

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