Abstract— A new digital ambient‐light sensor system is presented which employs two linear light sensors with different sensitivities and automatically adjusts the sensitivity based on the illumination condition. The adaptation mechanism allows a very wide range of light intensity to be detected, and the input dynamic range of the system is substantially improved from 22.5 to 45.1 dB. The proposed method does not require any additional precision bits for output data. Due to the small number of the output bits and the simple conversion process, the system can be easily integrated on the display panel.

To develop large-size and high-resolution TFT-LCDs with 10-bit or higher gray scale, key issues in the driver architecture and circuit design and TFT-LCD panel issues for realizing true 10-bit gray scale or higher gray scale images are discussed. We show our recent results of the 10-bit gray scale TFT-LCD data driver for 42-inch diagonal size and WXGA format TFT-LCD TV applications.

No abstract