LED (Light-Emitting Diode) display screen

Abstract

The invention relates to the field of LED (Light-Emitting Diode) packaging, in particular to an LED display screen. The LED display screen comprises a lamp panel and LED lamp beads arranged on the lamp panel, wherein light absorption face masks are arranged on the lamp panel and are positioned among the LED lamp beads; the widths of the light absorption face masks are gradually reduced from the ends in contact with the lamp panel to the opposite ends. The light absorption face masks are arranged among the LED lamp beads for absorbing external light, so that external stray light is reduced, and the display contrast ratio is promoted; meanwhile, the structures of the light absorption face masks are improved, so that the widths, at the ends in contact with the lamp panel, of the light absorption face masks are greater than those at the other ends opposite to the ends in contact with the lamp panel, the widths, at the ends far away from the lamp panel, of the light absorption face masks are arranged in a reduced mode, the absorption and blocking of light absorption walls of the light absorption face masks for red, green and blue light rays in the LED lamp beads are reduced, the visual angle of the display screen is enlarged, and the visual color difference is eliminated as much as possible. Meanwhile, the using material of the light absorption face masks is further reduced, and the product cost is reduced.

Description

technical field [0001] The present invention relates to the field of LED packaging, more specifically, to an LED display screen. Background technique [0002] As the cost of LEDs decreases and the spacing shrinks, LED displays are increasingly used indoors. Due to changes in the use environment, the technical requirements for small-pitch LEDs are getting higher and higher, and the display effect requirements are higher, especially the contrast and vision, which require better contrast and wider viewing angles. [0003] Such as figure 1 As shown, the existing LED screen is formed by pasting the LED lamp bead 1 on the lamp board 2 through reflow soldering. There are metal pins leaking from the bottom of the LED lamp bead 1, and some solder pads on the lamp board 2 are also made of metal. Because the metal material will reflect the external light, thereby reducing the display contrast. [0004] To solve this problem, such as figure 2 As shown, the industry generally choose...

AI Technical Summary

Problems solved by technology

However, due to the size limitation of small-sized LED lamp beads, the arrangement of R, G, and B chips inside the general LED lamp bead 1 is arranged in a straight line, which will cause the position of each chip relative to the light-absorbing wall of the light-absorbing mask 3 to be different. The absorption of red, green and blue light is also different, and different colors will be seen from different angles, such as image 3 As shown, when viewed on one side, it will be blue or blue, and when viewed on the other side, it will be yellow or red, which will cause viewing angle difference and seriously affect the display effect of the LED screen.

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