Optical module for dimming in ultra-low OD region

Abstract

The invention discloses an optical module for dimming in an ultra-low OD region. According to the invention, through the design of a transparent layer and a white glue layer, the white glue layer haslow light source transmittance; little light penetrates through the top of the white glue layer; most of light can be transmitted through the four transparent plates, the light-emitting angle is larger than or equal to 270 degrees, light is emitted from the side face of the transparent layer, a secondary optical lens does not need to be added, meanwhile, the LED wafers are arranged in the transparent layer, the size of the LED wafers is small, the light-emitting angle is large, the LED wafers are arranged on a high-reflectivity PCB, and the OD5 mm target is achieved. Through the design of circular screen printing or square screen printing, the screen printing shape of the surface of the PCB can be changed according to the light type, adjustment of the visual effect is met, the multiple bases are arranged on the PCB in a rectangular array shape, and high reflectivity of the PCB can be guaranteed without adding reflection paper to the PCB.

Description

technical field [0001] The invention relates to the technical field of optical modules, in particular to an optical module with ultra-low OD area dimming. Background technique [0002] At present, the direct type quantum dot backlight module on the market, the mainstream is SMD blue LED with secondary optical lens, plus quantum film, to achieve the goal of wide color gamut, but the OD value is between 18mm and 35mm, resulting in the OD value of the entire optical module high. At the same time, the visual effects of the existing optical modules cannot be adjusted. It is necessary to add reflective paper on the PCB to ensure the reflectivity. At the same time, the goals of wide color gamut, high heat dissipation, ultra-low OD, and high uniform visual effects cannot be guaranteed. Contents of the invention [0003] The object of the present invention is to provide an optical module with ultra-low OD area dimming, which solves the following technical problems: (1) Through the...

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Problems solved by technology

[0003] The object of the present invention is to provide an optical module with ultra-low OD area dimming, which solves the following technical problems: (1) Through the design of the transparent layer and the white glue layer, the transmittance of the white glue layer to the light source is low, and the white glue layer A small amount of light is transmitted from the top of the layer, and most of the light can be transmitted through four transparent plates. The light emitting angle is ≥ 270°, so that the side of the transparent layer emits light without adding a secondary optical lens. At the same time, the LED chip is arranged in the transparent layer. Small size, large luminous angle, arranged on a high-reflectivity PCB board, achieve the goal of OD5mm, and solve the technical problem that the optical module needs to add a secondary optical lens in the prior art, so that the OD of the entire optical module is high; (2) Through the design of circular silk screen or square silk screen, the shape of the silk screen on the surface of the PCB board can be changed according to the light pattern, and the technical problem that the visual effect of the optical module cannot be adjusted in the prior art is solved; (3) Several bases are rectangular Arranged on the PCB board in an array, through the bonding design of the diffusion film, the quantum film, and the composite film, it can achieve wide color gamut, high heat dissipation, ultra-low OD, and high uniform visual effect, and solve the problem that the PCB board needs to be added in the prior art. Only reflective paper can guarantee the reflectivity, and at the same time, it cannot guarantee the goal of wide color gamut, high heat dissipation, ultra-low OD, and high uniform visual effect

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