Optical bonding is an additional thin resin layer added between the touch screen and the TFT LCD layers. The resin layer consists of a plastic layer molded with a liquid synthetic resin that eliminates air gaps between the glass and TFT layers. In the touch screen monitor, the touch screen sensor is mounted in front of the LCD surface, causing a small air gap between these two components. Therefore, when sunlight passes through the touchscreen layer, some lights are reflected between the LCD surface and touch screen, reducing the LCD's viewability. As a result, optical bonding reduces refractions on the screen since the sunlight can no longer pass through under the screen's surface, increasing contrast and clarity.

Another method to make a sunlight readable touch screen monitor is to convert the diffuser material that is located between the LED backlight and LCD pixels to a transflective material. Transflective TFT LCD is a TFT LCD with both transmissive and reflective characteristics. The reflective mirror layer faces the LCD pixels; therefore, when the sunlight enters, it will bounce off the transflective layer back through the pixels to the eyes. Thus, high sunlight intensity has a lower impact on readability as the sunlight is reflected through the pixels and contributes to LCD brightness. On the other side, the transmissive layer scattering the light passing through the LED backlight to the LCD pixels, but this does not allow as much of the backlight to pass through the diffuser layer, making it not ideal in indoor or low ambient light environments.