Light guide plate and backlight module

Abstract

The invention relates to a backlight module with good light-emitting uniformity, which comprises a light guide plate and luminous elements, wherein the light guide plate is a plate body, of which the two opposite sides are provided with two grooves inwards; the two grooves divide the light guide plate into an optical conversion part, a light guide part and a connecting part which is positioned and connected between the optical conversion part and the light guide part; the optical conversion part is provided with two first incident surfaces corresponding to the two opposite sides of the light guide plate; the at least one pair of luminous elements is respectively arranged corresponding to the two first incident surfaces of the optical conversion part; and light emitted by the at least one pair of luminous elements is incident to the optical conversion part through the two first incident surfaces, converted into uniform light by the optical conversion part, incident to the light guide part, optically guided by the light guide part, and is emergent. In addition, the invention also relates to a light guide plate capable of being applied to the backlight module.

Description

technical field [0001] The invention relates to a light guide plate, in particular to a backlight module using the light guide plate. Background technique [0002] At present, light emitting diodes (Light emitting Diode, LED) are gradually replacing the existing cold cathode fluorescent lamps (Cold Cathode Fluorescent Lamp, CCFL) as the light emitting unit of the backlight module due to the advantages of small size, high efficiency, and long life, so as to save power , thereby reducing energy waste. For details, please refer to the article "Solid-State Lighting: Toward Superior Illumination" published by Michael S. Shur et al. in the document Proceedings of the IEEE, Vol.93, No.10 (October 2005). [0003] Such as figure 1 As shown, an existing backlight module 10 includes a plurality of light emitting diodes 11 and a light guide plate 12. The light guide plate 12 conducts optical guidance on it, such as reflection, heat dissipation, refraction, etc., and finally emits lig...

AI Technical Summary

Problems solved by technology

However, due to the limited divergence angle (usually 120 degrees) of the existing light-emitting diodes 11, the light guide plate 12 is located on the side of the light incident surface 120 and corresponds to the part between two adjacent light-emitting diodes 11. Inaccessible area, that is, a dark band 124 is formed on the light guide plate 12

The dark band 124 reduces the light uniformity of the backlight module 10, and when the backlight module 10 is used as a backlight for a display device, the display device also cannot obtain a better display effect due to uneven light output.

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