Light emitting diode (LED) display screen

Abstract

A light emitting diode (LED) display screen comprises a circuit base board, and a plurality of luminous units and a light mixing device which are connected onto the circuit base board, wherein the light mixing device is installed on the circuit base board in detachable mode, the luminous units are located between the circuit base board and the light mixing device, and the light mixing device refracts light rays sent out from the luminous units. According to the LED display screen, after the light rays sent out from the luminous units are refracted by the light mixing device, light emitting angles of the light rays, which are formed on the surface of the light mixing device, are increased, light intensity of central areas of the luminous units are weakened, and light intensity of marginal areas of the luminous units are relatively intensified. Accordingly, luminance uniformity of a frame of the LED display screen is improved, granular sensation and dazzling sensation of the frame displayed by the LED display screen are reduced, and therefore good display effects are obtained. Additionally, compared with an existing method for improving the display effects by increasing the density of the luminous units, needed display effects of the LED display screen can be achieved without need of improving circuit board configuration difficulty or increasing the quantity of the luminous units, and preparation cost of the LED display screen is reduced.

Description

technical field [0001] The invention relates to a display screen, in particular to an LED (Light Emitting Diode, light-emitting diode) display screen with low cost and good image display effect. Background technique [0002] Due to its high brightness, low power consumption, and stable performance, LED display screens are being widely valued and rapidly developed, and these LED display screens are more and more used in people's daily life, for example, set in leisure Electronic display screens in squares, commercial streets, hospitals, railway stations and other places. The LED display is composed of LED lights and printed circuit boards (PCB). By controlling the display mode of the LED lights, one or more LED lights in red, blue, green and other colors can be used to display text and pictures. , animations, videos, and more. That is to say, most LED display screens realize dynamic display through multiple LED light source arrays, and each LED light source array is equival...

AI Technical Summary

Problems solved by technology

This luminous feature will lead to uneven brightness of the screen of the LED display screen, and the screen display effect is poor.

In addition, because the light-emitting area is often concentrated near the center of the light-emitting unit, it is easy to generate glare, and the user will have a dazzling feeling when watching

If the commonly used method of increasing the density of light-emitting units is adopted, it will increase the difficulty of the layout of the printed circuit board and the heat dissipation of the LED light source, and will increase the manufacturing cost

Images