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LCD backlight system with compatibility of night vision of using LED light source

A technology of LED light source and backlight system, applied in the field of backlight system, can solve the problems of high process requirements, no mention of the use of filtered LED light source, light leakage, etc.

Inactive Publication Date: 2007-02-21
西藏扎喜雅培科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the brightness of the display drops significantly after installing the filter
When the monitor works during the day, especially under direct sunlight, in order to meet the brightness requirements, the filter must be removed, and it must be reinstalled at night, which is extremely inconvenient to use
Frequent disassembly and assembly can easily lead to light leakage, and the requirements for craftsmanship during the installation process are also high
[0010] In the existing patented backlight system, there is no mention of the use of LED light sources that filter red light and infrared light

Method used

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  • LCD backlight system with compatibility of night vision of using LED light source
  • LCD backlight system with compatibility of night vision of using LED light source
  • LCD backlight system with compatibility of night vision of using LED light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] See figure 2 A plurality of normal mode LED light sources 11 and a plurality of night vision compatible mode LED light sources 12 are installed on the PCB 2 at the same time, and the two kinds of LED light sources are evenly arranged according to the requirements of daytime and nighttime working conditions. During daytime work, a higher brightness of the backlight is required. Therefore, the number of LED light sources 11 in the normal mode is larger, and the number of LED light sources 12 in the night vision compatible mode is smaller.

[0027] In this example, both the normal mode LED light source and the night vision compatible mode LED light source are white LED light sources; the night vision compatible mode LED light source 12 has a spectral filter film 122 added to the package structure, such as image 3 As shown, the filtering range of the spectral filter film is red light and infrared light in the wavelength range of 610nm to 930nm, and in other visible light bands,...

Embodiment 2

[0033] Basically the same as the first embodiment, the difference is that the normal mode of the LED light source 11 and the night vision compatible mode of the LED light source 12 are LED light sources packaged with three primary colors of red, green, and blue, and the LED chips of each color can be Independent drive control to control parameters such as the spectral composition and brightness of the light emitted by the LED light source.

[0034] In this way, no matter whether the liquid crystal display is working during the day or night, it has a richer color performance capability. In the daytime working state, because there is no blocking by the filter film, the color will not be lost, unlike the traditional night vision compatible display, no matter what working state, due to the blocking of the filter film, a part of the color is lost; at night In the working state, while having a certain color display capability, the spectrum filter membrane filters out the red light and i...

Embodiment 3

[0036] Basically the same as the first embodiment, the difference is that the normal mode of the LED light source 11 uses red, green, and blue three primary color unit packaged LED light sources, wherein the LED chips of each color can be independently driven and controlled to control the LED light source emitting light Parameters such as spectral composition and brightness.

[0037] Among them, the night vision compatible mode LED light source 12 is an LED light source composed of blue and green LED chips in a unit package, and a spectral filter film is added to the package.

[0038] In this way, in the daytime working state, the liquid crystal display will not lose color, and has a rich color performance capability. In the night working state, the red light and infrared light in the wavelength range of 610nm to 930nm are filtered out by the spectral filter membrane, which meets the night vision compatibility standard.

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PUM

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Abstract

A LED back light system applying LED light source and having night vision compatibility consists of one set of normal LED light source formed by white LED light source or RGB color LED light source, one set of night vision compatibility LED light source formed by multiple LED light source with night vision compatibility filtering off light in scope of 610nm-930nm. The two said sets are not interfered to each other.

Description

Technical field [0001] The invention relates to a backlight system using a semiconductor light source, in particular to an LCD (Liquid Crystal Display) backlight light source that uses an LED (Light-Emitting Diode) light source and has night vision compatibility, and a preparation method and application thereof. technical background [0002] With the gradual maturity of ultra-bright LED technology, the price continues to drop. Because of its long life, vibration resistance, high luminous efficiency, no interference, no fear of low temperature, no mercury pollution, and high cost performance, LEDs are used in various signal display and The application in the field of lighting sources has been greatly expanded, especially in the application of liquid crystal display backlights. It has gradually replaced CCFL (Cold-Cathode Florescent Lamps, cold cathode fluorescent tubes) backlights, and has shown great development in the field of liquid crystal displays. po...

Claims

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Application Information

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IPC IPC(8): G02F1/13357H01L33/00G09F9/35G02F1/1335
Inventor 李明远陈盈君肖俊王亚春
Owner 西藏扎喜雅培科技有限公司