Renesas Electronics Corporation

Synaptics Display Devices Gk

Hirofumi Sonoyama

Shusaku Miyata

Hiroki Takeuchi

Sosuke Tsuji

Hikaru Shibahara

Hideaki Honda

A liquid crystal display driver IC includes a plurality of communication interface circuits, a plurality of driving circuits which drive a plurality of source lines, and a selector circuit. In order to secure a necessary band-width, a necessary number of circuits, among the plurality of communication interface circuits, is connected in parallel to the communication channels, and an unused circuit is suspended. The selector circuit selectively controls to which one of the plurality of driving circuits each of a plurality of image data outputs respectively received from the connected communication interface circuits is supplied.

LCD driver IC

The semiconductor IC device for display control disclosed herein aims to achieve a higher rate of memory access cycles without enhancing the current carrying capability of the memory device. The IC device is provided with a memory cell array capable to store display data, peripheral circuits to enable writing and reading of display data, and a control circuit which is able to control read and write operations from/to the memory cell array. The memory cell array comprises a plurality of memory blocks. The control circuit comprises a control logic which enables parallel processing of write operations in such a manner that, before completion of writing of data to one of the memory blocks, writing of data to another memory block is started. Write cycles are shortened by the parallel processing of write operations.

Semiconductor integrated circuit device for display controller

A semiconductor integrated circuit device includes a first high-speed serial interface circuit which has one differential serial data channel and a second high-speed serial interface circuit which has a plurality of differential serial data channels, the first high-speed serial interface circuit performs interface with the outside for control information, and a control circuit performs an internal operation on the basis of the control information. Both of the high-speed serial interface circuits share a RAM for storage of display data information. Whether the data information to be supplied to the RAM is received by using the first high-speed serial interface circuit or the second high-speed serial interface circuit is determined by the control circuit in accordance with the control information that is input to the first high-speed serial interface circuit.

Semiconductor integrated circuit device and data processor system

To provide an input interface technique of display data which can contribute to improvement of reliability and high performance of a system in which a semiconductor integrated circuit device including a RAM and a display driver circuit is incorporated. A semiconductor integrated circuit device includes a first high-speed serial interface circuit which has one differential serial data channel and a second high-speed serial interface circuit which has a plurality of differential serial data channels, the first high-speed serial interface circuit performs interface with the outside for control information, and a control circuit performs an internal operation on the basis of the control information. Both of the high-speed serial interface circuits share a RAM for storage of display data information. Whether the data information to be supplied to the RAM is received by using the first high-speed serial interface circuit or the second high-speed serial interface circuit is determined by the control circuit in accordance with the control information that is input to the first high-speed serial interface circuit.

Growing community of inventors

Tokyo, Japan

Hirofumi Sonoyama