Kwang-Sub Shin

51.1: Novel Simultaneous Emission Driving Scheme for Crosstalk‐free 3D AMOLED TV

A novel driving scheme based on simultaneous emission is reported for 2D/3D AMOLED TVs. The new method reduces left-right crosstalk without sacrificing luminance. The new scheme greatly simplifies the pixel circuit as the number of transistors for Vth compensation is reduced from 6 to 3. The capacitive load of scan lines is reduced by 48%, enabling very high refresh rate (240 Hz).

A self-reset ambient-light sensor system for low-temperature polycrystalline-silicon active-matrix displays

— A new digital ambient-light sensor system has been designed and fabricated on a glass substrate using a conventional low-temperature polycrystalline-silicon (LTPS) technology. In the proposed system, analog-to-digital conversion (ADC) is performed in the time domain instead of the voltage domain and is combined with a light-detection process. The proposed system employs self-reset architecture and requires only one comparator for n-bit digital output. Because the complex analog circuitry is eliminated from the system, it can be readily integrated on the glass substrate.

21.1: Distinguished Paper: 120 Hz 3D Driving for AMOLED with Interleaved Scan and Emission Operation

3D displays have required 1/240 s of scan time to properly display a stereoscopic image. In this report, a new driving method is proposed that provides 1/120 s of scan time, thus enabling higher resolution. The pixels are arranged as two groups: Even and Odd. One group performs scanning while the other group is emitting and in the next field, these roles are swapped. Therefore, the entire frame time can be used for data input, rather than 1/2 of the frame time as in the previous method.

48.1: A New Monolithic Polysilicon Ambient Light Sensor System with Wide Dynamic Range for Active-Matrix Displays by Employing an Adaptive Sensitivity Control Method

We design and fabricate a new digital ambient light sensor system on a glass substrate using a conventional low-temperature polycrystalline silicon (LTPS) technology. The adaptive sensitivity control scheme considerably increases the input dynamic range from 30 dB to 60 dB. In the proposed system, analog-to-digital conversion (ADC) process is performed in the time domain instead of the voltage domain and is combined with light detection process. Because the complex analog circuitry is eliminated from the system, the proposed system can be readily integrated on the display panel.