Back to results
US 2004/0164938 A1Published application
Image display apparatus
AssigneeSamsung SDI Co., Ltd.
InventorsJin-Hyun Choi, Choon-Yul Oh, Jae-Sung Lee
Life of this patent
Estimating the term…
Abstract
An image display apparatus with pixels where each of the pixels has a light emitting element such as an organic EL (electro-luminescence) element. The brightness of the light emitting element is controlled by the current flowing in the light emitting element. The image display apparatus adjusts the amplitude of the white gray levels in accordance with average brightness of a screen displayed by RGB data.
Claims18
An image display apparatus, comprising:
- a display panel having pixels arranged in a matrix and for performing a display operation;
- a scan driver for sequentially selecting pixel lines of the display panel;
- a data driver for applying color signals to a corresponding pixel line when the pixel line of the display panel is selected;
- and
- a display controller for receiving color data and generating timing signals for controlling the scan driver and the data driver, while transforming the color data into analog signals and performing gamma correction to the transformed analog signals to generate the color signals,
- wherein the display controller determines reference data for brightness adjustment in accordance with an average brightness of a screen displayed by the RGB data, and performs gamma correction by adjusting gray levels of the RGB data in accordance with the reference data for brightness adjustment.
3 more elements
An image display apparatus, comprising:
- a timing signal generating block for generating a timing signal for controlling a scan driver and a data driver by using inputted RGB data and transforming a data format of the inputted RGB data;
- a data operating block for calculating an average brightness of a screen displayed by the inputted RGB data and outputting address information corresponding to the calculated average brightness;
- a memory for storing reference data for brightness adjustment as data information corresponding to addresses, the reference data being matched with the calculated average brightness, and outputting reference data for brightness adjustment in response to the address information outputted from the data operating block;
- a D/A converting means for transforming the RGB data outputted from the timing signal generating block and the reference data for brightness adjustment into analog signals;
- an amplifying block for amplifying the analog signal of the reference data for brightness adjustment outputted from the D/A converting means;
- and
- a differential amplifying block for controlling white level of the RGB data by using analog signals of the RGB data and the reference data for brightness adjustment and generating RGB signals.
4 more elements
A method for generating color signals for an image display apparatus, the method comprising:
- receiving color data;
- generating timing signals for controlling a scan driver and a data driver;
- transforming the color data into analog signals;
- determining reference data for brightness adjustment based on an average brightness of a screen displayed by the color data;
- and
- performing gamma correction on the transformed analog signals to generate the color signals by adjusting gray levels of the color data based on the reference data for brightness adjustment.
3 more elements
Dependencies are inferred from the claim text.