Optical plate and method for making same and back light module unit using same
An optical plate and light source technology, applied in optics, optical elements, nonlinear optics, etc., can solve the problems of low light utilization rate, large light energy consumption and loss, etc., to reduce optical transmission loss, improve light utilization rate, interface The effect of reducing the number of
Inactive Publication Date: 2010-04-07
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
[0004] Although the diffuser plate 3', the diffuser sheet 4' and the prism sheet 5' are in close contact with each other, there is still a finer air barrier layer at the interface between them, and the light passes through the diffuser plate 3', the diffuser sheet 4' and the prism sheet. When propagating between the sheets 5', the light is prone to interface reflection and other effects at each interface, resulting in large energy consumption and loss of light, and low utilization of light
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[0017] The optical plate, its preparation method, and the backlight module using the optical plate will be further described in detail below with reference to the drawings and embodiments.
[0018] See figure 2 and image 3 , the backlight module 10 includes a reflector 11 , a light source 12 and an optical plate 13 disposed above the reflector 11 in sequence. The optical plate 13 includes a transparent substrate 131 , the substrate 131 has a light emitting surface 1311 opposite to the light source 12 , and a light incident surface 1312 opposite to the light emitting surface 1311 and facing the light source 12 . Wherein, the optical plate 13 further includes a plurality of microprisms 132 formed on the light emitting surface 1311 ; and a diffusion layer 133 formed on the light incident surface 1312 . The diffusion layer 133 includes a transparent resin 1331 , first scattering particles 1332 and second scattering particles 1333 with a higher refractive index than the first s...
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Abstract
The present invention discloses an optical plate which comprises a transparent optical substrate. the transparent optical substrate includes a light-in surface and a light-out surface which is opposite to the light-in surface; wherein, the optical plate also includes a plurality of micro-prisms formed at the light-out surface and a diffusion layer formed at light-in surface; the diffusion layer includes transparent resin, a first scattering particle and a second scattering particle; the refractive index of the first scattering particle is smaller than that of the second scattering particle. Inaddition, the present invention also provides a preparative method of the optical plate and a backlight module group adopting the optical plate, both of which have the advantage of improving the utilization ratio of light.
Description
technical field [0001] The invention relates to an optical plate for a backlight module and a preparation method thereof, and a backlight module using the optical plate, in particular to a composite optical plate and a backlight module using the composite optical plate. Background technique [0002] Liquid crystal display devices are widely used in electronic products such as personal digital assistants, notebook computers, digital cameras, mobile phones, and LCD TVs. However, since the liquid crystal display device is not self-illuminating, it needs a backlight module to produce a display function. [0003] See figure 1 , a schematic cross-sectional view of a backlight module in the prior art. The backlight module 10' includes a reflection plate 1', and above the reflection plate 1', a plurality of light sources 2', a diffusion plate 3', a diffusion sheet 4' and a prism sheet 5' are sequentially included. Among them, the diffuser plate 3' is relatively thick in order to ...
Claims
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IPC IPC(8): G02F1/1335G02B5/04G02B1/04
CPCG02B3/0056G02F1/133606G02B5/0242G02B5/021G02B5/0278
Inventor 章绍汉
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD