Scan driving control of a plasma display according to a predetermined data pattern
AssigneeLG Electronics Inc.
InventorJung Gwan Han
Life of this patent
Estimating the term…
Abstract
A plasma display apparatus has scan electrodes, data electrodes intersecting the scan electrodes, and discharge cells disposed at the intersections of the scan electrodes and the data electrodes. A scan driving unit scans the scan electrodes. A data driving unit supplies a data signal to the data electrodes, and a control unit controls the scan driving unit and the data driving unit. The control unit detects data patterns of input data to detect the load of data, and controls the scan of the scan driving unit according to the load. As such, if the scan electrodes are divided into two or more groups and supplied with scan signals, variation in the polarity of data signals applied to the data electrodes can be minimized.
Claims13
A plasma display apparatus including scan electrodes, data electrodes intersecting the scan electrodes, and discharge cells at the intersections of the scan electrodes and the data electrodes, the apparatus comprising:
- a scan driving unit that scans the scan electrodes in a scan sequence;
- a data driving unit that supplies a data signal to the data electrodes;
- and
- a control unit for controlling the scan driving unit and the data driving unit, wherein the control unit detects at least one predetermined data pattern of input data and determines if a data load associated with the at least one data pattern exceeds a first reference point or a second reference point, and controls the scan sequence according to the data load,
- wherein the control unit detects at least two data patterns, the at least two data patterns includes at least one of a first data pattern in which a high level and a low level alternate in both a row direction and a column direction of the discharge cells, and
- a second data pattern in which a high level and a low level alternate in the row direction and alternate in groups of two in the column direction,
- wherein the control unit controls the scan driving unit to scan the scan electrodes in a first scan sequence if the data load of the first data pattern exceeds the first reference point, and the control unit controls the scan driving unit to scan the scan electrodes in a second scan sequence, different from the first scan sequence, if the data load of the second data pattern exceeds the second reference point, and
- wherein the first scan sequence is a sequence in which the scan electrodes are divided into two groups and then scanned and the second scan sequence is a sequence in which the scan electrodes are divided into four groups and then scanned.
A plasma display apparatus, comprising:
- scan electrodes;
- data electrodes intersecting the scan electrodes;
- a scan driving unit that scans the scan electrodes in a scan sequence depending upon a data load associated with a pattern over a portion of at least two scan electrodes;
- a data driving unit that supplies a data signal corresponding to the scan to the data electrodes;
- and
- a control unit for controlling the scan driving unit and the data driving unit, wherein the control unit detects at least one predetermined data pattern of input data and determines if a data load associated with the at least one data pattern exceeds a first reference point or a second reference point, and controls the scan sequence according to the data load,
- wherein the control unit detects at least two data patterns, the at least two data patterns includes at least one of a first data pattern in which a high level and a low level alternate in both a row direction and a column direction of the discharge cells, and
- a second data pattern in which a high level and a low level alternate in the row direction and alternate in groups of two in the column direction,
- wherein the control unit controls the scan driving unit to scan the scan electrodes in a first scan sequence if the data load of the first data pattern exceeds the first reference point, and the control unit controls the scan driving unit to scan the scan electrodes in a second scan sequence, different from the first scan sequence, if the data load of the second data pattern exceeds the second reference point, and
- wherein the first scan sequence is a sequence in which the scan electrodes are divided into two groups and then scanned and the second scan sequence is a sequence in which the scan electrodes are divided into four groups and then scanned.
A method of driving a plasma display apparatus including scan electrodes, and data electrodes intersecting the scan electrodes, comprising the steps of:
- detecting at least one predetermined data pattern of input data and determining if a data load associated with the at least one data pattern exceeds a first reference point or a second reference point, and controlling a scan sequence according to the data load;
- scanning the scan electrodes in the scan sequence depending upon the data load of at least two scan electrodes;
- and
- supplying a data signal corresponding to the scan sequence to the data electrodes,
- wherein the detecting is to detect at least two data patterns, the at least two data patterns includes at least one of a first data pattern in which a high level and a low level alternate in both a row direction and a column direction of the discharge cells, and
- a second data pattern in which a high level and a low level alternate in the row direction and alternate in groups of two in the column direction,
- wherein the controlling is to control the scan electrodes in a first scan sequence if the data load of the first data pattern exceeds the first reference point, and the controlling is to control the scan electrodes in a second scan sequence, different from the first scan sequence, if the data load of the second data pattern exceeds the second reference point, and
- wherein the first scan sequence is a sequence in which the scan electrodes are divided into two groups and then scanned and the second scan sequence is a sequence in which the scan electrodes are divided into four groups and then scanned.
Dependencies are inferred from the claim text.