Display driving apparatus and method for driving display driving apparatus, and display apparatus and mtehod for driving display apparatus
US7701421B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 2007 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | Jan 29, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light-emitting element (OLED) is caused to emit light with preferred brightness and gradation level depending on display data. During a precharge period, a data driver applies a precharge voltage (Vpre) to a capacitor (Cs) via a data line (Ld). After the application of the precharge voltage, a voltage converter reads, after a transient response period (Ttrs), a reference voltage Vref to generate a compensation voltage (a·Vref). A voltage calculator compensates, based on the compensation voltage (a·Vref), an original gradation level voltage Vorg having a value in accordance with display data generated by a gradation level voltage generator. As a result, the voltage calculator generates a compensated gradation level voltage Vpix corresponding to a variation amount of an element characteristic for a transistor Tr13 for driving light emission to apply the compensated gradation level voltage Vpix to a data line Ld.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.