Light source device

Abstract

A light source device includes a first light-emitting element providing illumination beams, a light guide plate (LGP) divided into light-transmissive regions, an optical thin film, and microstructures. The LGP has a first surface, a second surface opposite to the first surface, and a first light-incident surface connecting the first and second surfaces. The first light-emitting element is beside the first light-incident surface. The illumination beams are capable of entering the LGP through the first light-incident surface. The optical thin film is on the second surface of the LGP. The optical thin film has different thicknesses corresponding to at least two of the light-transmissive regions. The microstructures are on the optical thin film. When the illumination beams pass through the light-transmissive regions corresponding to the different thicknesses of the optical thin film and leave the LGP through the first surface, the illumination beams are converted into color beams with different wavelengths.

Description

【Technical field】 [0001] The present invention relates to an optical element, and in particular to a light source device. 【Background technique】 [0002] A common light source device is, for example, a backlight module, and the backlight module usually includes a light guide plate. Generally speaking, the role of the light guide plate is to guide the direction of light beams, improve the brightness of the panel, and ensure the uniformity of the brightness of the panel, so as to convert the point light source or line light source in the backlight module into a surface light source for the liquid crystal. display panel. [0003] In detail, when the light beam enters the light guide plate, the light beam can be continuously transmitted to the outside of the light guide plate by total reflection, or can be transmitted to outside the light guide plate. In addition, the above-mentioned microstructure also has the function of directing the light beam. For example, Taiwan Patent...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the light beam generated by the light source is usually white light, and the white light is composed of colored light beams of different colors, and the colored light beams of different colors will interfere with each other in the light guide plate

Therefore, when these colored light beams are delivered to the outside of the light guide plate, the problem of local color shift of the light guide plate often occurs, resulting in chromatic aberration in the rear-end display screen

In addition, since the backlight module has been produced at this time, the chromatic aberration caused by the interference phenomenon cannot be adjusted

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