LED (light emitting diode) light shading film with convex groove structure

Abstract

The invention discloses an LED (light emitting diode) light shading film with a convex groove structure. The LED light shading film comprises a convex groove and fitting surfaces, and the convex groove is used for covering an LED light, and the fitting surfaces are peripherally connected with the convex groove and fittingly attached to a light guide film. During assembly, the convex groove of the shading film correspondingly covers a portion, protruding the light guide film, of the LED light, and the fitting surfaces of the shading film are fittingly attached to the light guide film. The LED light shading film with the convex groove structure avoids upward fitting stress generated due to height difference between an LED light fitting area and a light guide film fitting area of a conventional shading film, the shading film can be kept closely attached to the light guide film for a long time, and high reliability in side leakage of light is achieved. In addition, a convex groove preparation method is simple, and low production cost, small size and high practicality in application to mobile phone backlight modules high in space limits are realized.

Description

technical field [0001] The invention relates to a light-shielding film for an LED lamp in a mobile phone or a liquid crystal display backlight module. Background technique [0002] The light guide film and LED light are important components of the backlight module of the LCD screen and the keypad of the mobile phone. The light guide film is mainly used to guide the incident light of the LED lamp into the light guide film and change the light propagation path to destroy the full radiation condition of the light. , and then emitted perpendicular to the light-emitting surface of the light-guiding film. The side light leakage of the light guide film and LED will affect the utilization rate of light, reduce the overall brightness of the light guide film, and thus affect the brightness of the display screen or key letters. In mobile phone backlight modules, due to space constraints, the shape of most LED shading films cannot be designed too large, and the shading position is smal...

AI Technical Summary

Problems solved by technology

The light leakage from the side of the light guide film and LED will affect the utilization rate of light, reduce the overall brightness of the light guide film, and thus affect the brightness of the display screen or key letters

In mobile phone backlight modules, due to space constraints, the shape of most LED shading films cannot be designed too large, and the shading position is small

The conventional height of the LED light is between 0.4-0.6mm, and the overall height of the light guide film basically does not exceed 0.3mm. Therefore, after the LED lamp and the light guide film are assembled, a considerable part of the LED light protrudes beyond the height of the light guide film. After the flat light-shielding film is attached to the LED light position, the height of the LED light attachment area is higher than the thickness of the light guide film attachment area, and the two are not on the same level (such as figure 1 As shown), the shading sheet in the area of ​​the LED light will be subjected to upward stress from the LED light, which will eventually cause the bonding between the shading sheet and the light guide film to be weak, and light leakage from the side of the LED light will occur

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