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Diffusion plate, manufacturing method thereof and backlight module

A technology of backlight module and manufacturing method, which is applied in the direction of optics, light source, electric light source, etc., to achieve the effect of reducing H/P value, suppressing color cast problem, and increasing the degree of scattering

Inactive Publication Date: 2014-09-24
苏州东显光电科技有限公司
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Problems solved by technology

However, the LEDs currently used are generally blue chips + yellow phosphors. The light of the yellow wavelength in the reflective secondary lens is not easy to achieve the condition of total reflection, and it is easy to refract from the top of the secondary lens, thus forming a yellow circle above the lens.

Method used

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  • Diffusion plate, manufacturing method thereof and backlight module
  • Diffusion plate, manufacturing method thereof and backlight module
  • Diffusion plate, manufacturing method thereof and backlight module

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Embodiment Construction

[0034] As mentioned in the background technology, although the reflective secondary lens can reduce the H / P value in the backlight module, but because the existing LED white light source is made by mixing blue light and yellow light, after entering the reflective secondary lens , part of the yellow light is directly refracted from the top of the lens because it does not meet the total reflection condition, so that the light spot formed by the reflective secondary lens has a color cast phenomenon.

[0035] In order to improve the above problems, the present invention designs a diffusion plate, which is provided with reflective dots that cooperate with yellow light to form white light, and these reflective dots are formed by adding a small amount of blue ink to the white ink. According to the complementary color principle of light, after yellow light is incident on these reflective dots, it can cooperate to form white light, reduce the yellow light component in the mixed color li...

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Abstract

The invention relates to a diffusion plate, a manufacturing method of the diffusion plate and a backlight module. The diffusion plate is applied to the direct type backlight module provided with a reflecting type second lens. Reflecting net points are arranged on the diffusion plate and formed by white printing ink mixed with a small amount of blue printing ink and white light is generated by the reflecting net points with yellow light, so that the color cast problem caused by use of the reflecting type second lens is solved.

Description

technical field [0001] The invention relates to the field of plane display, in particular to a diffuser plate of a reflection type secondary lens direct-down type backlight module and a manufacturing method thereof. Background technique [0002] Backlight sources are widely used in traditional liquid crystal displays (LCD) and large advertising boards. The traditional cold cathode tube (CCFL) backlight has been gradually replaced by light emitting diode (LED) backlight. The initial backlight is realized by a light guide plate with engraving on the back, and the light source (CCFL for line light source or LED for point light source) introduces light from the side of the light guide plate. Due to the limitation of light guide plate technology, this method is not efficient. The direct-type liquid crystal display backlight effectively improves the lighting efficiency problem. Since LED is a point light source with limited beam angle, when it is used in direct-lit LED backlight...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/02F21V5/08B41M1/12B41M1/26F21S8/00G02F1/13357F21Y101/02F21Y101/00F21Y115/10
Inventor 王凯袁园
Owner 苏州东显光电科技有限公司
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