Akihiro Nagase

33.2: Development of Single Chip Overdrive LSI with Embedded Frame Memory

Methods of reducing overdrive memory using fixed block truncation coding (FBTC) have been studied since 2002, and the effects have been described from time to time. To date, our study has developed a timing controller for liquid crystal panels (TCON), and located in this panel, are a compression feedforward driving (cFFD) unit, which constitutes the basic structure, and a motion adaptive CODEC feedforward driving (macFFD) unit, which switches the structure according to the motion. Both driving units are available for the overdrive of 1/3 compressed images. Further in 2006, we proposed a high compression feedforward driving (hcFFD) algorithm for 1/6 compressed image overdrive. This paper reports the technology of hcFFD integrated into a single LSI, in which the performance has been improved and the circuit has been simplified through a review of the algorithm.

60.2: Dynamic Bit‐Rate Allocation of High‐Compression Feedforward Driving

We have developed High Compression Feedforward Driving (hcFFD) that can compress the image data stored in the frame memory of overdrive down to 1/6. Together with the optimization of the encoding parameters of macFFD, which belongs to the previous generation, this hcFFD technique corrects the response time of liquid crystal with smaller and less memory by means of a system that dynamically controls the bit rate allocated to the luminance signal and the color signal. This 1/6 reduction of image data allows us to structure a memory interface with a 16-bit data bus even on high-definition LCD panels, ensuring both low cost and secured performance.

4.3: Development of PTV Using Six-Primary-Color Display Technology

We have developed the 6 primary color PTV. Because of the newly developed 6-color color wheel, the 6-color light engine combined with the high-efficiency UHP lamp and our independent Plush1080p™ technology, the newly developed PTV ensures high brightness, a wide color gamut and high contrast.

3.4: Invited Paper: Laser TV - Ultra Wide Color Gamut in Conformity with xvYCC

This paper provides some interpretations of the Laser TV which we have successfully developed [1]. The Laser TV is an HDTV that adopts solid state lasers involving three primary colors, red, green and blue for the light source. The adoption of a laser light source helped us realize an HDTV with a dramatically wide color gamut, namely 190% the color gamut of ITU-R BT.709. In addition, we have also developed an LSI that can deal with the extended color space xvYCC, which is a new international standard, and mounted the LSI in the HDTV. The display of colorful and natural video pictures has been achieved through the effective use of the wide color gamut involved in the laser light source supported by a video signal processing circuit that complies with the xvYCC standard and Natural Color Matrix, a color management technique.