Side-entry light guide plate assembly, side-entry backlight module and display device

Abstract

The invention relates to the technical field of liquid crystal display and provides a side-entrance type light guide plate assembly, a side-entrance type backlight module and a display device. The side-entrance type light guide plate assembly comprises a first light guide plate, a polarization spectroscopic film and a second light guide plate which are successively fitted; the light shined on the first light guide plate is converted into linearly polarized light which is reflected by the polarization spectroscopic film through a polarization generator and the light is reflected by a first reflecting surface when reaching to an end surface, and then converted to a linearly polarized light transmitted by the polarization spectroscopic film after reciprocating through a 1 / 4 wave sheet; therefore, light can be transmitted reversely through the polarization spectroscopic film and then emitted from the mesh points of the second light guide plate reflecting surface successively. The light emitted from the mesh points passes through at least one first light guide plate length mixture so that light source quantity can be reduced under the condition that no overheated point is generated and the overall thickness of light guide plate assembly will not be increased by increasing the distance between light sources in design.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, and in particular provides a side-entry type light guide plate assembly, a side-entry type backlight module and a display device. Background technique [0002] In the field of liquid crystal display, the current conventional side-type backlight solutions such as figure 1 As shown, in order to avoid hot spots on the light incident side, the ratio of the distance between the LED light-emitting surface and the effective display area AA of the light guide plate L to the LED spacing d must be greater than a certain value, that is, the LED spacing d cannot be too small, otherwise the light incident Insufficient light mixing in the side LED light divergence area will cause hot spots. Therefore, the LED particles on the side-type backlight strip are usually arranged very closely, which will lead to the following problems: (1) In addition to the brightness factor, the LED spacing must also...

AI Technical Summary

Problems solved by technology

Therefore, the LED particles on the side-type backlight strip are usually arranged very closely, which will lead to the following problems: (1) In addition to the brightness factor, the LED spacing must also be considered when determining the number of LEDs in design, so the number of LEDs cannot Too little, can not effectively reduce the cost of LED; (2) LED arrangement density is high, heat dissipation is poor, affecting product reliability

However, the disadvantage of this solution is that the lower surface of the light guide plate is stepped, and the overall shape of the light guide plate is slope-shaped, which increases the thickness of the entire liquid crystal module, which is not conducive to the thinning of the display device.

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