TFT-LCD-Concept analysis and process introduction

TFT (Thin Film Transistor) LCD Thin Film field effect Transistor LCD, is a type of active matrix liquid crystal display (LCD) AM - one of the, because of the fast response time, better display quality, suitable for large-scale dynamic picture display, are widely used in notebook computers, desktop computer monitors, LCD TV, LCD projectors and all kinds of large electronic display products.

                             

TFT LCD is more complex, mainly by: fluorescent tube, light guide plate, polarizer plate, filter plate, glass substrate, film, liquid crystal material, thin mode transistor and so on.Above all, liquid crystal display must use backlight source first, namely fluorescent lamp tube projects a light source, these light sources can pass through a polarizer board to pass through liquid crystal again next.At this point, the arrangement of liquid crystal molecules will change the Angle of light penetrating the liquid crystal. However, these light rays must also pass through the color filter film in front of them and another polarizing plate.So we want to change the voltage value that stimulates liquid crystal to be able to control the light intensity that appears finally and colour only, can change on liquid crystal face plate so give the color combination that has different tonal.

Each pixel of tft-lcd is controlled by the TFT integrated on itself, and they are active pixels.Therefore, not only the reaction time can be greatly accelerated, at least to about 80ms;Contrast and brightness have also been greatly improved;At the same time, the resolution has been improved unprecedentedly.We call it "true color" because of its higher contrast, richer colors, and faster screen updates.

Introduction to tft-lcd three-stage main manufacturing process

The front

The process used in the front is similar to that used in semiconductors, except that thin film transistors are made on glass rather than silicon wafers.

In the middle

The middle segment is based on the glass substrate of the front segment, which is combined with the glass substrate of the color filter, and the liquid crystal (LC) is poured between the two glass substrates.

Back segment (module assembly)

The assembly process of the rear section module is the production of assembling the glass after the Cell manufacturing process with other components such as backlight plate, circuit, outer frame and so on.