Display control device
US7659878B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2007 |
| Grant date | Feb 9, 2010 |
| Priority date | — |
| Expiry date | May 20, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display control device has: a shift register generating n shift pulses in series; a data hold block configured to hold n gradation data; and a DA converter for converting the n gradation data into corresponding gradation voltages. The data hold block includes: n first latch circuits configured to respectively latch the n gradation data in series in synchronization with the n shift pulses; and n second latch circuits provided between the DA converter and the n first latch circuits. An electrical connection between the first latch circuits and the second latch circuits is cut off while the first latch circuits receive the n gradation data. After the first latch circuits finish latching all the gradation data, the n gradation data are simultaneously supplied to the DA converter from the first latch circuits through the second latch circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.