Picture quality controlling system
AssigneeLG. Philips LCD 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.
Claims20
A picture quality controlling method of a flat panel display device including a display panel having a link pixel, where a defective pixel is electrically connected to an adjacent non-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;
- computing a brightness information of a video signal which is to be displayed in the panel defect location of the display panel;
- computing a color difference information of the video signal which is to be displayed in the panel defect location of the display panel;
- generating a modulated brightness signal by increasing or decreasing the brightness information according to the panel defect compensation data;
- generating a modulated video signal from the modulated brightness information and the color difference information;
- generating a compensated video signal by increasing or decreasing the modulated video signal according to the charge characteristic compensation data.
A picture quality controlling apparatus of a flat panel display device having a display panel having a link pixel inluding a defective pixel that is electrically connected to an adjacent non-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 generates a modulated video signal by increasing or decreasing a brightness information of a video signal to be displayed in the panel defect location according to the panel defect compensation data stored at the memory;
- and
- a second compensator that generates a compensated video signal by increasing or decreasing one or more of a red, green, or blue component of the modulated video signal according to the charge characteristic compensation data stored at the memory.
A flat panel display device, comprising:
- an interface circuit configured to receive from an external source input defect compensation data and input defect location data;
- a memory in communication with the interface and configured to store the received input compensation data and the received input defect location data.
Dependencies are inferred from the claim text.