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Light source device

A technology of a light source device and a light guide plate, which is applied in the field of optical components, can solve the problems of local color shift of the light guide plate, the problem of chromatic aberration that cannot be adjusted, and the color difference of the display screen, so as to achieve the effect of reducing the phenomenon of bright spots and the problem of local color shift

Inactive Publication Date: 2013-03-13
CORETRONIC
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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

Method used

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no. 1 example

[0038] figure 1 It is a schematic diagram of the light source device according to the first embodiment of the present invention. Please refer to figure 1 , the light source device 100 of this embodiment includes a light emitting element 110 , a light guide plate 120 , an optical film 130 and a plurality of microstructures 140 . The light emitting element 110 is used for providing an illumination light beam L1. In this embodiment, the light emitting element 110 is, for example, a light emitting diode (LED), and the illumination light beam L1 is, for example, white light, wherein the white light is composed of a plurality of color light beams of different colors.

[0039] Such as figure 1 As shown, the light-emitting element 110 is disposed beside the light guide plate 120, and the light guide plate 120 is divided into a plurality of light-transmitting regions A1-A3 (only three are schematically shown). Besides, the light guide plate 120 has a surface S1 , a surface S2 and a...

no. 2 example

[0050] image 3 It is a schematic diagram of a light source device according to the second embodiment of the present invention. Such as image 3 As shown, the light source device 200 and figure 1 The light source device 100 is similar, but the main difference between the two is that: the light source device 200 further includes a light emitting element 210, and the light guide plate 120' also has a light incident surface S4 opposite to the light incident surface S3. Wherein the light emitting element 210 is disposed beside the light incident surface S4. In this embodiment, the light emitting element 210 is, for example, a white light emitting diode.

[0051] In addition, the thickness of the optical film 230 near the light-emitting element 110 and the light-emitting element 210 is smaller than the thickness of the optical film 230 at the place away from the light-emitting element 110 and the light-emitting element 210 . In other words, compared to the optical film 230 in t...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V13/00F21V9/40
CPCG02B6/0043G02B6/005G02B6/0048G02B6/00
Inventor 温育铨刘振坤
Owner CORETRONIC
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