LCD backlight system with compatibility of night vision of using LED light source
A technology of LED light source and backlight system, which is applied in the field of backlight system, can solve the problems of decreased brightness of the display, high process requirements, and no mention of the use of filtered LED light sources, etc., to achieve the effect of simplifying the structure
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Embodiment 1
[0027] see figure 2 A plurality of LED light sources 11 in normal mode and a plurality of LED light sources 12 in night vision compatible mode are installed on the PCB2 at the same time, and the two kinds of LED light sources are evenly arranged according to the needs of daytime and nighttime working conditions respectively. The backlight needs to have a higher brightness during daytime work, so the number of LED light sources 11 in the normal mode is large, and the number of LED light sources 12 in the night vision compatible mode is small.
[0028]In this example, both the LED light source in the normal mode and the LED light source in the night vision compatible mode are white LED light sources; the LED light source 12 in the night vision compatible mode has added a spectral filter film 122 in the package structure, 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 v...
Embodiment 2
[0034] Basically the same as Embodiment 1, the difference is that the LED light source 11 in the normal mode and the LED light source 12 in the night vision compatible mode are all LED light sources packaged with red, green and blue primary color units, 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.
[0035] In this way, regardless of whether the liquid crystal display works in the daytime or at night, it has a richer color performance capability. In the daytime working state, because there is no blocking of the filter film, the color will not be lost, unlike the traditional night vision compatible display, no matter what the working state is, due to the blocking of the filter film, part of the color will be lost; at night In the working state, while having a certain color display capability, the red light and infrared light in the wavelength ra...
Embodiment 3
[0037] Basically the same as Embodiment 1, the difference is that the LED light source 11 in the normal mode uses an LED light source packaged in three primary color units of red, green, and blue, wherein the LED chips of each color can be independently driven and controlled to control the amount of light emitted by the LED light source. Parameters such as spectral composition and brightness.
[0038] Wherein the LED light source 12 of the night vision compatible mode is an LED light source composed of blue and green LED chips in unit packaging, and a spectral filter film is added in the packaging.
[0039] In this way, in the daytime working state, the liquid crystal display will not lose color, and has rich color performance capabilities. In the working state at night, the red light and infrared light in the wavelength range of 610nm to 930nm are filtered out by the spectral filter film, which meets the night vision compatibility standard.
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