OGS/ On-Cell/ In-Cell touch technology of capacitive screen


The introduction of OGS/ On-Cell/ In-Cell touch technology of capacitive screen is as follows:

 

*OGS technology: OGS (one glass solution) is currently the main solution used in full-fit LCD capacitive touch screens. It integrates the touch layer and the protective layer glass, coats the ITO (indium tin oxide) conductive layer on the inner side of the protective glass, and directly coats the protective glass and photolithography, which saves a piece of glass and one lamination, The LCD touch screen is made thinner and lighter, and the cost is reduced. However, because the OGS protective glass is integrated with the touch screen, it usually needs to be strengthened first, then coated, etched, and finally cut. Cutting on the strengthened glass is very troublesome, and some capillary cracks will form on the edge of the glass, which will reduce the strength of the glass.

 

*In-cell technology: The method of embedding the touch panel function into the liquid crystal pixel, that is, embedding the touch sensor function inside the display screen. Incell placed the ITO touch film under the upper glass substrate of the display panel and fused it with the liquid crystal layer. The innovation of the In-cell touch panel is that the circuit is loaded on the liquid crystal, so that the liquid crystal screen has the perception and touch screen input capabilities of the traditional touch screen. The In-cell touchpad is not only more accurate, but also eliminates the need for a touchpad, making the entire touchscreen thinner and lighter. Traditional touchscreens are difficult to see clearly in sunlight, but now that there is no touchpad, naturally Without parallax, readability is also improved.

 

*On-Cell technology: refers to the solution of embedding the touch screen between the color filter substrate and the polarizer of the display screen, that is, the touch sensor is equipped on the LCD panel. The technical difficulty is simpler than that of Incell. For panel products, the technology has not yet overcome the problems of thinning and uneven color during touch.