The Design And Operation Of A Tft Lcd Liquid Crystal Screen

The front sheet metal, display panel, drive circuit, and back light source are the building blocks that make up the TFT LCD display module. It is possible to say that the fundamental construction of the module is finished after it has been deconstructed.

When referring to the layout of a "Open Cell," the phrase "Open Cell" refers to the arrangement in which the driving circuit and the display screen are combined. The front sheet metal is a frame made of metal that includes buckles as a means of securing the backlight and Open Cell while also covering the glass boundaries of the display panel. The buckles are what allow the front sheet metal to be constructed. A box that is used to display a range of images is referred to as a display screen. There are two pieces of glass that make up its construction, and each of those parts contains liquid crystal. Displaying the photos is done on the screen that is utilized for display. The display screen is connected to the driving circuit, which is comprised of a printed circuit board (PCB), an integrated circuit (IC), and a flexible printed circuit (FPC). This connection allows for the display screen to communicate with the driving circuit. After it has been enabled, the connecting substrate is put to function in order to supply the display screen with a variety of display information on the screen. The backlight, which is comprised of a rubber frame, an optical film, and a light source, among other components, serves the purpose of supplying a specific light source for TFT LCD display displays. This is accomplished by providing the backlight with the goal of giving the same light source. Backlight is the name given to this particular kind of light source since it is situated behind the display surface. This is the reason why it is called a backlight.

Display Panel

In addition to being the most technologically advanced display screen (Panel), it is the most important component of TFT LCD display screens. Construct the display screen from top to bottom, paying special attention to the polarizing plate, liquid crystal, TFT substrate, polarizing film, and color film (CF) substrate. Examine the display screen from top to bottom. It is the responsibility of a polarizer to block light that is coming from other directions while also limiting the amount of light that is coming from the source of the backlight. Once the liquid crystal molecules have been processed by polarizers to control the light output from the screen, the brightness of TFT LCD display panels can be altered by modifying the twisting effect of the molecules. This allows the brightness to be adjusted with more precision. According to the pixel voltage that is applied to the liquid crystal, the ability of the liquid crystal to twist is determined. This side of the TFT substrate is equipped with a TFT switch array that is built into the substrate, which enables precise control of the pixel voltage. There are three subpixels that make up a pixel on a CF substrate. These subpixels are blue B, green G, and red R. The amount of light that is allowed to flow through the RGB primary colors on the CF substrate is altered by the liquid crystal, which acts as a light valve. This allows the liquid crystal to create the required color display.

Backlight

In order to guarantee that the TFT LCD display screens have a consistent distribution of light intensity, it is the responsibility of the backlight source to fulfill this responsibility. Those structures that are of the side light type and those that are of the straight down type are the two categories that can be distinguished between from one another. In order to identify these groups, the various positions at which light sources are scattered are taken into consideration. It is important to construct a structure in the shape of a sandwich that comprises diffusers, prisms, and diffusers. This structure must be situated above the source of the backlight. The purpose of the lower diffuser, which is also often known as the bottom diffuser, is to guarantee that the light that is coming from below is distributed in an even manner. To concentrate scattered light and radiate it into a specific angle range, prism lenses make use of the laws of full reflection and refraction. This allows them to achieve their desired effect. This leads to an increase in the brightness of the region that is contained within the range of angles that have been specified. The top diffuser, which is also known as the panel diffuser, is intended to shield the panel from the scratches that are caused by the prism lens. This is accomplished by the use of protective coatings. Furthermore, it is constructed in such a way that it prevents dirt or scratches from being generated by factors that are external, such as the panel.

Final Thoughts

There is a great deal of intricacy in the manner in which TFT LCD display panels are constructed, and each structural module plays an important function within the display at the same time. There are a number of fundamental modules that are used to construct a TFT LCD display panel. These modules were briefly explained earlier in this paragraph. The display panel, the driver circuit, and the back light circuit are all components that are already incorporated into these modules. Additionally, the front sheet metal is included. When it comes to LCD screens, it is my honest hope that everyone will find it beneficial to have an understanding of the technology that lies beneath them. In the event that you have any questions or concerns regarding the high brightness, degree of customization, and selection of TFT LCD panels that are provided by Kolai Electronics, it is strongly suggested that you do not hesitate to get in touch with our technical specialists. Contacting them is highly encouraged. In the event that you require an LCD display panel, you can rely on us to provide you with the most appropriate alternative options.