Electro-optical device, driving circuit and driving method thereof, and electronic apparatus
To correct brightness by measuring with accuracy and high speed variation of the brightness between pixels of an organic EL display. A first correction data memory stores a first correction data Dhy in a row direction, and a second correction data memory stores second correction data Dhx in a column direction. A first operation circuit generates a pixel correction data DH based on the first correction data Dhy and the second correction data Dhx. The pixel correction data DH is stored into a pixel correction data memory. Input gray scale data Din is corrected by the pixel correction data DH to output as output gray scale data Dout.
1. A driving circuit for driving an electro-optical device having a pixel region in which a plurality of electro-optical elements is arranged in a matrix, comprising:
correction data memory for storing block correction data corresponding to a plurality of blocks into which the pixel region is divided to correct control data that controls emission brightness of the electro-optical elements;
a pixel correction data memory corresponding to each electro-optical element for storing data for correcting the emission brightness of each electro-optical element;
the plurality of blocks comprising a plurality of block groups each being divided with different division schemes, each of the plurality of electro-optical elements belonging to more than two block groups, and the block correction data comprising a plurality types of data belonging to the plurality of block groups;
a first correction circuit that provides correction data to the pixel correction data memory by using the plurality types of the block correction data obtained by the different division schemes; and
a second correction circuit correcting the control data by using the correction data provided to the pixel correction data memory.
2. The driving circuit according to claim 1 , wherein the first correction circuit comprises:
specifying means for specifying a pixel to be controlled by the control data; and
operation means for performing an operation on the block correction data to generate pixel correction data for the pixel specified by the specifying means, wherein the control data is corrected by using the generated pixel correction data.
3. The driving circuit according to claim 1 ,
wherein the control data allows the emission brightness of the electro-optical element to be controllable and comprises individual control data corresponding to each of the plurality of block groups, and
wherein the first correction circuit uses the block correction data of a block group that corresponds to the individual control data to correct the corresponding individual control data.
4. An electro-optical device comprising:
the driving circuit according to claim 1 ;
a pixel region arranged in a matrix having a plurality of electro-optical elements driven by a current;
image control means for sequentially displaying image patterns corresponding to a plurality of blocks into which the pixel region is divided;
current measuring means for measuring a current supplied to the electro-optical elements for each block to output the supplied current as a block current; and
correction data generation means for generating the block correction data based on a difference of the block current with respect to a predetermined reference current value.
5. The electro-optical device according to claim 4 , wherein the electro-optical elements are organic light-emitting diodes.
6. An electronic apparatus comprising the electro-optical device according to claim 4 , as a display unit.
7. A method of driving an electro-optical device which comprises a pixel region in which a plurality of electro-optical elements is arranged in a matrix; control data generation means for controlling emission brightness of the electro-optical elements; and storage means for storing block correction data to correct control data of each block for each of a plurality of block groups into which the pixel region is divided with different division schemes, the method comprising the steps of:
storing block correction data, in block correction memory, to correct control data of each block for each of a plurality of block groups, the plurality of blocks comprising a plurality of block groups each being divided with different division schemes, each of the plurality of electro-optical elements belonging to more than two block groups, and the block correction data comprising a plurality types of data belonging to the plurality of block groups;
performing an operation on a plurality of types of the block correction data to generate pixel correction data for each pixel;
storing the generated pixel correction data for each pixel in a memory corresponding to each pixel; and
correcting the control data by using the stored pixel correction data.
8. The method of driving the electro-optical device according to claim 7 , further comprising the steps of:
driving the electro-optical device with a current;
sequentially displaying image patterns respectively corresponding to the plurality of blocks into which the pixel region is divided;
measuring the current supplied to the electro-optical elements for each block as a block current; and
generating the block correction data based on a difference of the block current with respect to a predetermined reference current value.
9. A method of driving an electro-optical device which comprises a pixel region in which a plurality of electro-optical elements is arranged in a matrix; control data generation means for controlling emission brightness of the electro-optical elements; and memory for storing block correction data to correct control data of each block for each of a plurality of block groups into which the pixel region is divided with different division schemes, the method comprising the steps of:
storing block correction data to correct control data of each block for each of a plurality of block groups in a block correction memory, wherein the plurality of blocks comprising a plurality of block groups each being divided with different division schemes, each of the plurality of electro-optical elements belongs to more than two block groups, and the block correction data comprises a plurality types of data belonging to the plurality of block groups; and
specifying a pixel to be controlled by the control data;
performing an operation on the block correction data to generate pixel correction data for the specified pixel;
storing the generated pixel correction data for each pixel in a memory corresponding to each pixel; and
correcting the control data by using the generated pixel correction data obtained by the different division schemes.
10. A method of driving an electro-optical device which comprises a pixel region in which a plurality of electro-optical elements is arranged in a matrix; and block correction memory for storing block correction data to correct control data of each block for each of the plurality of block groups into which the pixel region is divided with different division schemes, the method comprising the steps of:
generating and storing in a memory corresponding to each of the electro-optical elements, control data to control emission brightness of each of the electro-optical elements, wherein the control data includes individual control data corresponding to each of the plurality of block groups, the plurality of blocks comprises a plurality of block groups each being divided with different division schemes, each of the plurality of electro-optical elements belonging to more than two block groups, and the block correction data, stored in the block correction memory, comprising a plurality types of data belonging to the plurality of block groups; and
correcting the individual control data by using the block correction data of the block group corresponding to the individual control data obtained by the different division schemes.