Liquid crystal display

Abstract

The application of the invention provides a liquid crystal display, comprising a liquid crystal panel that comprises a quantum dot color pixel layer, an upper polarizer, a liquid crystal box and a lower polarizer stacked in sequence; the quantum dot color pixel layer comprises red pixel unis, green pixel units and blue pixel units. The liquid crystal display also comprises a backlight module arranged below the liquid crystal panel, the backlight module comprises a back plate and a light-emitting device arranged on the back plate, and the light-emitting device comprises an LED light source and a light collimating structure arranged above the LED light source. According to Lagrange invariant, the light collimating structure is arranged above the LED light source, light outgoing aperture is enlarged, emergent angle of backlight is decreased, the light emerges under certain degree of collimation, and therefore, the problem that large backlight emergence angle of the liquid crystal panel during image displaying leads to inter-pixel color crosstalk is solved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a liquid crystal display device. Background technique [0002] At present, a new display method of LCD TV is to directly replace the color filter in the traditional liquid crystal panel with the quantum dot color pixel layer, which mainly includes red pixel unit, green pixel unit and blue pixel unit, wherein the red pixel unit is set to red Quantum dot material; green pixel unit is set with green quantum dot material; blue pixel unit is not set with quantum dot material. When the blue backlight shines on the red, green and blue pixel units, the blue backlight in the blue pixel unit directly transmits and emits blue light; the quantum dot material in the green pixel unit absorbs blue light and converts it into green light, and the red pixel unit The quantum dot material absorbs blue light and converts it into red light. [0003] Since the quantum dot material will change the ph...

AI Technical Summary

Problems solved by technology

However, in the prior art, due to the large angle of light output from the backlight, the problem of color crosstalk between different pixels in the quantum dot liquid crystal panel often occurs.

[0004] For color crosstalk between pixels, please refer to Figure 1a As shown, taking the display of green pixels as an example, the liquid crystal cell 111 corresponding to the green pixel unit 122 is in the open state, and the liquid crystal cell 111 corresponding to the red pixel unit 121 and the blue pixel unit 123 is in the closed state, but the backlight provided by the backlight source 100 The light output angle is relatively large. After the blue backlight is processed by the lower polarizer 110, the liquid crystal cell 111 and the upper polarizer 112, it can still irradiate the red pixel unit 121 and the blue pixel unit 123. The red pixel unit 121 has quantum dot materials. After receiving the blue backlight, red light is emitted; when the blue backlight passes through the blue pixel unit 123, it is directly transmitted, so that when displaying green, red light and blue light are generated, thereby reducing the color purity of the green light

Similarly, red pixels and blue pixels also have the problem of color crosstalk

Images