Image display apparatus and drive method
AssigneeSamsung SDI Co., Ltd.
InventorDong-Yong Shin
Life of this patent
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Abstract
Disclosed is an image display apparatus having, in every pixel, a light-emitting element such as an organic electro-luminescence (EL) element of which the brightness is controlled by a current. The image display apparatus includes transistors that form a current mirror in the pixel and using a pixel structure having two scan lines, so as to select pixels of at least two rows simultaneously, distribute the current applied to the data line to the pixel for recording display information and the adjacent pixel, and record the display information on the pixel of no more than one row among the selected pixels. This drastically increases the current for driving the data line and decreases the size of the transistors that form the current mirror in the pixel.
Claims17
An image display apparatus comprising:
- a plurality of data lines for transferring a current including brightness information;
- a plurality of scan lines arranged to intersect the data lines;
- a plurality of pixels formed in a matrix form having rows and columns, each pixel being located at a different intersection of the data and scan lines, each row of pixels being coupled to corresponding first and second said scan lines, and each column of pixels being coupled to a corresponding one of the data lines, each pixel receiving at least a portion of the current transferred through the corresponding data line when selected by the corresponding first scan line, and performing a display operation according to the current supplied through the corresponding data line when selected by the corresponding second scan line;
- a scan driver responsive to a clock signal and a control signal for generating first signals for selecting pixels of at least two consecutive rows simultaneously and second signals for recording the brightness information on the corresponding pixels;
- and
- a data driver for generating the current including the brightness information, and applying the generated current to the corresponding data line.
An image display apparatus comprising:
- a plurality of data lines for transferring a current including brightness information;
- a plurality of scan lines arranged to intersect the data lines;
- and
- a plurality of pixels formed in a matrix form having rows and columns, each pixel being located at a different intersection of the data and scan lines, each row of pixels being coupled to a corresponding one of the scan lines, and each column of pixels being coupled to a corresponding one of the data lines, the pixels performing display operation according to the current supplied through the corresponding data line when selected by the corresponding scan line;
- a scan driver responsive to a clock signal and a control signal for generating signals for sequentially selecting the pixel rows during a predetermined time and applying the generated signals to the scan lines respectively;
- and,
- a data driver for generating current including the brightness information and applying the generated current to the corresponding data line,
- wherein the signals generated in the scan driver have an overlapping period for selecting consecutive pixel rows simultaneously, the current generated in the data driver is applied to the consecutive pixel rows, data recording is performed at one pixel row of the consecutive pixel rows and the generated current is distributed in substantially equal portions to the consecutive pixel rows that are selected simultaneously.
A method for driving an image display apparatus having a plurality of pixels arranged in a matrix form having rows and columns, comprising:
- selecting at least two consecutive pixel rows simultaneously for a first predetermined time period;
- selecting said at least two consecutive pixels rows sequentially for a second predetermined time period, which overlaps the first predetermined time period, wherein the second predetermined time period is less than the first predetermined time period;
- performing data recording on the pixel row selected during the second predetermined time period;
- and
- distributing data current in substantially equal portions to said at least two consecutive pixel rows when said at least two consecutive pixel rows are simultaneously selected.
A method of driving an imaging display apparatus comprising a plurality of pixels arranged in a matrix form having rows and columns, said method comprising:
- selecting a first row of pixels for a first predetermined time period;
- selecting a second row of pixels for a second predetermined time period, wherein the second row is adjacent to the first row, and the first and second predetermined time periods are substantially the same in duration and at least partially overlap with one another;
- providing a current containing brightness information to a first pixel on the first row and a second pixel on the second row while the first and second predetermined time periods overlap, wherein the current is distributed to both the first and second pixels;
- and
- selecting the first row for a third predetermined time period that overlaps with the first predetermined time period to record the brightness information on the first pixel.
Dependencies are inferred from the claim text.