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US 7,116,305 B2Granted
Display driving device, display apparatus, and method of driving the same
AssigneeRohm Co., Ltd.
InventorTakashi Naiki
Life of this patent
Estimating the term…
Abstract
A display driving device adapted to output a column driving voltage to a sequentially selected one of row terminals of a display panel during a respective row selection period. The row selection period includes an accessing period for accessing a display memory and an idling period in which no access is made. At least a portion of the idling period may be provided prior to the accessing period. The idling period may be regulated in accordance with the display mode chosen.
Claims14
A method of driving a display panel having multiple row lines and multiple column lines, said method comprising steps of:
- driving said multiple column lines while a driver is driving one of said multiple row lines in a row selection period, based on display data read from a display memory, wherein said row selection period includes:
- an accessing period for accessing said display memory to read display data for said column lines (said display data referred to as column line data) and outputting said column line data to said driver;
- and an idling period for making no access to said display memory, such that each of row selection periods for selecting said multiple row lines includes said idling period at the beginning of said row selection period and said accessing period at the end of said idling period;
- and
- reading the column line data for the next row line to be displayed during the next row selection period from the display memory in time intervals within said accessing period, each of said intervals shorter than said accessing period.
2 more elements
A display driving device, comprising:
- a display memory for storing display data;
- a driver for driving multiple column lines of a display panel based on display data retrieved from said display memory, during a period in which one of multiple row lines of said display panel is selected (said period referred to as row selection period);
- and
- a display controller for retrieving display data from said display memory in time intervals within said row selection period, and outputting said display data to said driver, and wherein said row selection period includes:
- an accessing period for accessing said display memory to retrieve display data for said column lines (said display data referred to as column line data) and outputting said column line data to said driver, and an idling period in which no access is made, wherein each of row selection periods for selecting said multiple row lines and includes said idling period at the beginning of said row selection period and said accessing period at the end of said idling period;
- and
- wherein the display controller reads the column line data for the next row line to be displayed during the next row selection period from the display memory in time intervals within said accessing period, each of said intervals shorter than said accessing period.
4 more elements
A display apparatus, comprising:
- a display panel having multiple row lines and multiple column lines;
- a display memory for storing display data;
- a driver for driving multiple column lines based on display data retrieved from said display memory, during a period in which one of said multiple row lines is selected (said period referred to as row selection period);
- a display controller for retrieving display data from said display memory in time intervals within said row selection period and outputting said display data to said driver, and wherein said row selection period includes:
- an accessing period for accessing said display memory to read display data for said column lines (said display data referred to as column line data) and outputting said column line data to said driver, and
- an idling period in which no access is made, wherein each of row selection periods for selecting said multiple row lines includes said idling period at the beginning of said row selection period and said accessing period at the end of said idling period, and
- wherein the display controller reads the column line data for the next row line to be displayed during the next row selection period from the display memory in time intervals within said accessing period, each of said intervals shorter than said accessing period.
4 more elements
Dependencies are inferred from the claim text.