A low‐power 262k‐color SOG (System‐On‐Glass) LCD has been developed for mobile applications. It is integrated with a DC‐DC converter and driver circuits that contain 6‐ bit DACs, and it consumes less than 5 mW in operations with a single voltage power supply of 2.5 V.
We have developed a new 12-bit driver IC with linear Digital-to-Analog converter circuits. The driver has a newly proposed pointto-point link interface named PPmL and a new gamma control circuit.The proposed interface can achieve high data-transfer rates that full-HD resolution LCD-TVs require, and our new Digital-to-Analog converter circuits can output any gamma curve controlled with only several hundred bit length parameters
A parallel digital-data-driver architecture has been developed to reduce power consumption in low-temperature poly-Si TFT-LCDs. It features low-power 3V-interface level shifters and 198 serial/parallel converters driven in parallel at a clock frequency of 62.5 kHz. Total power consumption in a 2. 4-in., 41K(176 x 234)-pixel TFT-LCD with integrated 6b DACs is 12 mW at a 30-Hz frame frequency.
In this paper, we describe a new low-power data-line driver for TFT-LCDs for portable devices. The driver contains newlydeveloped output buffers with low static current in place of operational amplifiers in a conventional driver. The new driver test-IC achieves about 85 % reduction in static current dissipation with a high output-voltage-resolution and a wide dynamic-outputrange.
A DC-DC converter composed of charge pumps and regulators has been integrated into a poly-Si TFT LCD that also contains a 6-bit DAC. It has the ability to supply regulated voltages to the 6bit DAC and to the LCD's gate driver circuit.
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