Light source device and TFT-LCD (Thin Film Transistor-Liquid Crystal Display) detection system using light source device

Abstract

The embodiment of the invention discloses a light source device and a TFT-LCD (Thin Film Transistor-Liquid Crystal Display) detection system using the light source device. The light source device comprises a shell body with a first end part and a second end part, wherein the middle axis of the first end part is parallel to or overlapped with the middle axis of the second end part; the first end part is provided with a light outlet and the inner side of the second end part is provided with a point light source for emitting light; a Fresnel lens is arranged between the first end part and the second end part; the point light source is located at a focus point of the Fresnel lens and a light surface in the Fresnel lens is arranged towards the first end part; one surface, which is engraved with a concentric circle, of the Fresnel lens is arranged towards the second end part; a conductive thin film is fixed at the light outlet of the first end part and is parallel to the Fresnel lens, and is internally filled with liquid crystal molecules; the conductive thin film is electrically connected with an electrifying switch arranged on the shell. According to the light source device, the electrifying switch is used for controlling the arraying manner of the liquid crystal molecules in the conductive thin film so that light beams, which penetrate through the conductive thin film to be emitted, can be converted between parallel light and diffusion light.

Description

technical field [0001] The invention relates to the field of liquid crystal display detection, in particular to a light source device used for liquid crystal display detection and a detection system using the device. Background technique [0002] TFT-LCD (Liquid Crystal Display-Thin Film Transistor, Thin Film Field Effect Transistor Liquid Crystal Display) is currently the only comprehensive performance that catches up with and surpasses CRT (Cathode Ray Tube, cathode ray tube) display device. TFT-LCD has excellent performance, good mass production characteristics, high degree of automation, low cost of raw materials, and broad development space. It has quickly become the mainstream product in the market. [0003] After the TFT-LCD is produced, its quality needs to be inspected, and whether there are defective liquid crystal molecules in the TFT-LCD is an important content of the quality inspection. figure 1 It shows the diagram of the existing detection equipment for qual...

AI Technical Summary

Problems solved by technology

Therefore, in the LCD-TFT quality inspection, there is a mistake that the dust on the surface of the TFT-LCD is a defect in the liquid crystal molecules inside the LCD-TFT, resulting in false detection

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