Picture quality controlling system
AssigneeLG Display Co., Ltd.
InventorJong Hee Hwang
Life of this patent
Estimating the term…
Abstract
A picture quality control system can determine a location of a display panel defect. The system can calculate data used to compensate for the display defect and modulate the compensation data on a video signal to compensate for the defect. The defect may be associated with a pixel or with a display panel area. A picture quality system may include a memory and a compensation circuit. The memory may store compensation data that represents a panel defect location and/or a charge characteristic. The compensation circuit may process the compensation data to increase or decrease brightness information and/or component information of a video signal.
Claims16
A picture quality controlling method of a flat panel display device including a display panel having a link pixel including a defective pixel and an adjacent non-defective pixel, that is electrically connected to the defective pixel, comprising:
- determining a panel defect location data which indicates the location of a panel defective area having a brightness difference in comparison with a non-defective area;
- determining a panel defect compensation data to compensate the brightness of the panel defect location;
- determining a charge characteristic compensation data to compensating a charge characteristic of the link pixel;
- determining a link pixel location data which indicates the location of the link pixel;
- storing the panel defect location data, the panel defect compensation data, the charge characteristic compensation data, and the link pixel location data in a memory of the flat panel display device;
- converting a video signal of the panel defective area into a brightness information and a color difference information;
- modulating the brightness information of the panel defective area by increasing or decreasing the brightness information according to the panel defect compensation data;
- converting the color difference information and the modulated brightness information into a modulated video signal;
- generating a compensated video signal by increasing or decreasing the modulated video signal according to the charge characteristic compensation data of the link pixel.
A picture quality controlling apparatus of a flat panel display device having a display panel having a link pixel including a defective pixel and an adjacent non-defective pixel, that is electrically connected to the defective pixel, comprising:
- a memory which stores a charge characteristic compensation data that compensates a charge characteristic for the link pixel, a link pixel location data that indicates a location of the link pixel, a panel defect compensation data that compensates a brightness of a panel defect area, and a panel defect location data which indicates a location of a panel defect area;
- a first compensator that converts a video signal of the panel defective area into a brightness information and a color difference information, modulates the brightness information of the panel defective area by increasing or decreasing the brightness information of the panel defective area according to the panel defect compensation data stored at the memory, and converts the color difference information and the modulated brightness information into a modulated video signal;
- and
- a second compensator that generates a compensated video signal by increasing or decreasing the modulated video signal from the first compensator according to the charge characteristic compensation data of the link pixel stored at the memory.
Dependencies are inferred from the claim text.