Patent ID: 8199074
Filing Date: 2012-06-12
Classification: G09G

Abstract:
1. A system for reducing mura defects, comprising: a pixel array comprising a plurality of pixels, each of the pixels comprising an organic light emitting element equipped with a sensing unit which is operative to retrieve display information responsive to the organic light emitting element when the organic light emitting unit emits according to a test signal, wherein the test signal is a fixed signal; a conversion circuit operative to determine a display parameter of each organic light emitting element according to the test signal and the display information of each organic light emitting element, wherein the conversion circuit comprises: a memory device operative to store the display parameter of each organic light emitting element; and a compensation circuit operative to modify a video signal to drive the pixel array in accordance with the display parameters stored in the memory device, wherein the sensing units monitor real light of the organic light emitting elements to form the display information, wherein the pixel array further comprises: a driving transistor comprising a gate, a first source and a first drain, wherein the first source or the first drain is connected to a power source line and the other to the organic light emitting element; and a switching transistor comprising a gate connected to a first scan line, a second source and a second drain, wherein the second source or the second drain is connected to a first data line and the other connected to the gate of the driving transistor, wherein the conversion circuit does not directly connect to the first data line; and wherein the sensing unit comprises a thin film transistor comprising a gate connected to a second scan line, a third source and a third drain, the third source or the third drain is connected to the organic light emitting element and the other to a second data line.