Display device and method for driving the same
AssigneeNEC Electronics Corporation
InventorTakashi Nose
Life of this patent
Estimating the term…
Abstract
Pixel data and black image data are simultaneously and respectively written to two pixels positioned in different pixel rows and this operation is performed two times on each of the different pixel rows to write corresponding data to all pixels in each of the different pixel rows. When the above operation is performed on all pixel rows within one frame period, a data latch circuit may hold only half the number of data that have to be held in the data latch circuit of the conventional signal line driving circuit, resulting in reduction in the size of data latch circuit chip and reduction in space occupied by a display device.
Claims7
A method for driving a display device including a pixel array with pixels arranged in a matrix of rows and columns, comprising the steps of:
- dividing a period of writing image data to at least one pixel row among pixel rows constituting said pixel array into a first scanning period and a second scanning period;
- writing image data to pixels located in predetermined pixel columns in an optional pixel row during said first scanning period and further writing black image data to pixels located in pixel columns other than said predetermined pixel columns and included in a pixel row different from said optional pixel row;
- and
- writing image data to pixels excluding said pixels allowing image data to be written thereto and located in said optional pixel row during said first scanning period and further writing black image data in pixels excluding said pixels allowing said black image data to be written thereto and included in said pixel row during said first scanning period.
A display device including a pixel array with pixels arranged in a matrix of rows and columns comprising:
- a first scanning line for selecting one set of pixels in one pixel row, said one pixel row constituting said pixel array;
- a second scanning line for selecting the other set of pixels in said one pixel row;
- a scanning-line driving circuit for driving sets of first and second scanning lines in order from top to bottom within said pixel array, each set of first and second scanning lines corresponding to each of individual pixel rows of said pixel array;
- a first set of signal lines for supplying a voltage corresponding to one of image data and black image data to pixels selected by said first scanning line out of one set of first and second scanning lines the second scanning line a second set of signal lines for supplying a voltage corresponding to one of image data and black image data to pixels selected by said second scanning line out of said one set of first and second scanning lines;
- and
- a signal-line driving circuit for driving said sets of first and second signal lines, said sets of first and second signal lines constituting entire signal lines;
- wherein said scanning-line driving circuit simultaneously drives said first scanning line out of said one set of first and second scanning lines and a second scanning line said out of another set of first and second scanning lines and wherein said signal-line driving circuit simultaneously outputs one of voltages corresponding to image data and black image data to said first set of signal lines and the other thereof to said second set of signal lines, and wherein said signal-line driving circuit writes a voltage corresponding to image data and a voltage corresponding to black image data into pixels included in two pixel rows different from each other.
Dependencies are inferred from the claim text.