Display driver circuit, electro-optical device, and display drive method
AssigneeSeiko Epson Corporation
InventorYusuke Ota
Life of this patent
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Abstract
The present invention provides a display driver circuit having a simple configuration due to a decrease in the number of voltage levels and capable of preventing deterioration of contrast ratio in display drive by using MLS, an electro-optical device, and a display drive method. First to fourth bits of grayscale data corresponding to a display pattern for three lines are supplied to each ROM. The ROMs decode and output 4MLS operation results for a display pattern defined by the first to fourth bits of the grayscale data and a dummy display-pattern corresponding to the display pattern based on orthogonal functions defined by combinations of a scan pattern and a dummy scan pattern of a virtual electrode based on a field signal.
Claims16
A display driver circuit which drives an electro-optical device having scan electrodes and signal electrodes by using a multi-line selection that selects three scan electrodes simultaneously, the display driver circuit comprising:
- first to m-th (m is a natural number) decoder circuits which are provided for respective bits of each of first to third grayscale data and output decoded output signals based on a field signal and the respective bits of each of the first to third grayscale data, the first to third grayscale data being m-bit data and corresponding to a scan pattern of the three scan electrodes;
- and
- a signal electrode driver circuit which drives the signal electrode based on the decoded output signals output from the first to m-th decoder circuits,
- wherein the first to m-th decoder circuits output the decoded output signals corresponding to the field signal, by using a result of a given operation executed on a display pattern and a dummy pattern corresponding to the display pattern, based on an orthogonal function which defines the scan pattern of the three scan electrodes in each field and a scan pattern of a virtual scan electrode corresponding to the scan pattern of the three scan electrodes.
A display driver circuit which drives an electro-optical device having scan electrodes and signal electrodes by using a multi-line selection that selects three scan electrodes simultaneously, the display driver circuit comprising:
- a grayscale data conversion circuit which converts m (m is a natural number) bits of first to third grayscale data corresponding to scan pattern of the three scan electrodes into (m+p) bits (p is a natural number) of first to third converted grayscale data, respectively;
- first to (m+p)th decoder circuits which are provided for respective bits of each of the first to third converted grayscale data and output decoded output signals based on a field signal and respective bits of each of the first to third converted grayscale data;
- and
- a signal electrode driver circuit which drives the signal electrode based on the decoded output signals output from the first to (m+p)th decoder circuits,
- wherein the first to (m+p)th decoder circuits output the decoded output signals corresponding to the field signal, by using a result of a given operation executed on a display pattern and a dummy pattern corresponding to the display pattern, based on an orthogonal function which defines the scan pattern of the three scan electrodes in each field and a scan pattern of a virtual scan electrode corresponding to the scan pattern of the three scan electrodes.
A display drive method of driving an electro-optical device having scan electrodes and signal electrodes by using a multi-line selection that selects three scan electrodes simultaneously, the method comprising:
- outputting decoded output signals for respective bits of each of first to third grayscale data, based on a field signal and the respective bits of each of the first to third grayscale data, the first to third grayscale data being m-bit (m is a natural number) data and corresponding to a scan pattern of the three scan electrodes;
- and
- driving the signal electrode based on the decoded output signals,
- wherein the decoded output signals are output corresponding to the field signal, by using a result of a given operation executed on a display pattern and a dummy pattern corresponding to the display pattern, based on an orthogonal function which defines the scan pattern of the three scan electrodes in each field and a scan pattern of a virtual scan electrode corresponding to the scan pattern of the three scan electrodes.
A display drive method of driving an electro-optical device having scan electrodes and signal electrodes by using a multi-line selection that selects three scan electrodes simultaneously, the method comprising:
- converting m (m is a natural number) bits of first to third grayscale data corresponding to scan pattern of the three scan electrodes into (m+p) bits (p is a natural number) of first to third converted grayscale data, respectively;
- outputting decoded output signals for respective bits of each of the first to third converted grayscale data, based on a field signal and respective bits of each of the first to third converted grayscale data;
- and
- driving the signal electrode based on the decoded output signals,
- wherein the decoded output signals are output corresponding to the field signal, by using a result of a given operation executed on a display pattern and a dummy pattern corresponding to the display pattern, based on an orthogonal function which defines the scan pattern of the three scan electrodes in each field and a scan pattern of a virtual scan electrode corresponding to the scan pattern of the three scan electrodes.
Dependencies are inferred from the claim text.