LED backlight module with large light emitting angle, and display device

Abstract

The invention relates to the technical field of televisions, and especially relates to an LED backlight module with a large light emitting angle, and a display device. Tin points are arranged on the surface of a PCB substrate, and an LED chip is fixed on the tin points in a die bonding manner; and the top surface of the LED chip is provided with a reflecting layer structure formed by injection molding through a mold, and the periphery and the upper part of the LED chip are wrapped in packaging colloid in a dispensing manner. The reflecting layer structure on the top surface of the LED chip issubjected to mold injection molding treatment, the periphery and the upper part of the LED chip are wrapped in the packaging colloid in the dispensing manner and are baked and molded, and a diffusionsheet is arranged above the LED chip, so that top light emission is effectively weakened, more light is emitted from the four side surfaces of the LED chip, and the light emission angle of the LED chip is larger. Therefore, according to the LED backlight module with the large light emitting angle, the light emitting angle of the LED chip is increased, and the optical quality is improved; and the use amount of chips is reduced, the cost performance is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of televisions, in particular to an LED backlight module and a display device with a large light output angle. Background technique [0002] Most of the existing LED backlight module light sources are used in the field of TV backlight. At present, LED backlight modules usually use LED light sources with bowl-shaped SMD traditional lamp bead light sources. The light output angle is generally around 120°. It needs to be used with a lens to increase the light output angle. , so that a uniform display surface light source can be achieved under a certain LED chip pitch and light mixing distance OD; in addition, the light emitting angle of the LED chip is small, and under a specific LED chip pitch, the light mixing distance needs to be larger to meet good conditions. The micro-distance mixing effect means that the overall thickness of the LED backlight module will increase, which does not meet the current mainstre...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an LED backlight module and a backlight module with a large light emitting angle, so as to solve the problem that the light emitting angle of the light source of the existing LED backlight module is generally about 120°, which needs to be used with a lens, and the LED light emitting angle is relatively large. Small, under a specific LED pitch pitch, the light mixing distance needs to be larger to meet the good macro light mixing effect, which means that the overall thickness of the LED backlight module will increase, which does not meet the current mainstream market where the whole machine is light and thin design trends etc.

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