led display

Abstract

The object of the present invention is to provide an LED display screen, which includes: an LED array, which is composed of a plurality of LED light-emitting units, and is used to emit light; an optical diffusion film, which is arranged on the light-emitting side of the LED array; a matrix light-shielding frame, It includes a plurality of hollowed-out light-shielding grids, and the hollow-out light-shielding grids correspond to the LED light-emitting units one by one; and a substrate, which is used to support the LED array and the matrix light-shielding frame, wherein the light emitted by the LED light-emitting units passes through its corresponding hollow-out light-shielding After the grid, it diffuses to the audience side through the optical diffusion film, and the LED light-emitting unit emits light toward the hollowed-out light-shielding grid. This technical solution prevents the ambient light outside the LED display screen from being directly incident on the optical surface of the LED light emitting unit to be reflected, thereby significantly improving the contrast of the LED display screen.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an LED display screen. Background technique [0002] Traditional movie projection equipment uses a combination of a projector and a screen. The projector remotely projects image light onto the screen to enlarge the image, and the screen reflects the image light to the audience, thereby realizing a large-screen display. Due to the design defects of the lens in the projector and the reflective characteristics of the screen, the traditional projection projection equipment using this method has the disadvantages of poor picture uniformity, low brightness, poor picture contrast and high energy consumption. In particular, the screen is a passive light-emitting device, which not only reflects the image light emitted by the projector, but also reflects the ambient stray light emitted from the auditorium, emergency indicator lights, etc. On the one hand, it is required to have good refle...

AI Technical Summary

Problems solved by technology

Figure 1b It shows the black filled area of ​​pixels when viewing the pixels of a conventional LED display screen from the audience side, and it can be seen that the central area is a bright area, which is because the light-emitting surface of the LED light-emitting unit itself also reflects ambient stray light, which will cause The contrast improvement is not very ideal

[0007] In order to reduce the impact of the contrast of the light-emitting surface of the LED light-emitting unit, it is necessary to reduce the size of the LED light-emitting unit. However, reducing the size of the LED will bring a series of technical problems such as mounting process and yield, which will greatly increase the product cost. Not conducive to the application and promotion of the product

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