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US 7,466,299 B2Granted
Display device
AssigneeHitachi Displays, Ltd.
InventorsNaruhiko Kasai, Takehide Furukawa, Hajime Akimoto, Mitsuhide Miyamoto
Life of this patent
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Abstract
A memory integrated type display device is provided which can simplify the circuit structure and suppress consumption power. The display device has a liquid crystal pixel unit having a plurality of display elements disposed in a matrix shape, a horizontal shift register for applying a voltage to the liquid crystal pixel unit, a digital/analog conversion unit, an amplifier, a scanning line drive unit for selecting scan lines in a vertical direction and a memory for storing display data, the memory being electrically connected between the amplifier and liquid crystal pixel unit.
Claims21
A display device comprising:
- a plurality of display elements disposed in a matrix shape;
- a data line drive circuit for applying a drive voltage to each of data lines of said plurality of display elements;
- a memory for storing display data;
- and
- a scanning line drive circuit for selecting said display element to be driven,
- wherein said memory is electrically connected between said data line drive circuit and said plurality of display elements disposed in the matrix shape;
- wherein said memory includes memory cells disposed in a matrix shape, said memory cells having a capacity which corresponds to display data of n-columns×m-rows where n and m are integers equal to or greater than 2,
- wherein said memory is configured to write the display data in said memory cell or read the display data from said memory cell synchronously with a timing at which said scanning line drive circuit selects said display elements sequentially, and
- wherein said n corresponds to the number of the columns of the plurality of display elements disposed in a matrix shape, and said integer m is smaller than the number of the rows of the plurality of display elements disposed in a matrix shape.
6 more elements
A display device comprising:
- a plurality of display elements disposed in a matrix shape;
- a data line drive circuit for applying a drive voltage to each of data lines of said plurality of display elements;
- a memory for storing display data;
- and
- a scanning line drive circuit for selecting said display element to be driven,
- wherein said memory is electrically connected between said data line drive circuit and said plurality of display elements disposed in the matrix shape,
- wherein said memory includes memory cells disposed in a matrix shape, said memory cells having a capacity which corresponds to display data of n-columns×m-rows where n and m are integers equal to or greater than 2,
- wherein said memory is configured to write the display data in said memory cell or read the display data from said memory cell synchronously with a timing at which said scanning line drive circuit selects said display elements sequentially,
- wherein said memory has a capacity capable of assigning one bit to each of pixels corresponding to a portion of said plurality of display elements disposed in the matrix shape, and
- wherein said one bit indicates whether said display data is larger or smaller than a predetermined threshold value.
7 more elements
A display device comprising:
- a pixel unit having a plurality of display elements disposed on a glass substrate;
- an amplifier for amplifying display data supplied from an external;
- and
- a memory disposed on said glass substrate for storing display data amplified by said amplifier;
- wherein said memory includes memory cells disposed in a matrix shape, said memory cells having a capacity which corresponds to display data of n-columns×m-rows where n and m are integers equal to or greater than 2,
- wherein said memory is configured to write the display data in said memory cell or read the display data from said memory cell synchronously with a timing at which said scanning line drive circuit selects said display elements sequentially, and
- wherein said n corresponds to the number of the columns of the plurality of display elements disposed in a matrix shape, and said integer m is smaller than the number of the rows of the plurality of display elements disposed in a matrix shape.
4 more elements
A display device, comprising:
- a pixel unit having a plurality of display elements disposed on a glass substrate;
- an amplifier for amplifying display data supplied from an external;
- and
- a memory disposed on said glass substrate for storing display data amplified by said amplifier;
- wherein said memory includes memory cells disposed in a matrix shape, said memory cells having a capacity which corresponds to display data of n-columns×m-rows where n and m are integers equal to or greater than 2;
- and
- wherein said memory is configured to write the display data in said memory cell or read the display data from said memory cell synchronously with a timing at which said scanning line drive circuit selects said display elements sequentially,
- wherein said memory has a capacity capable of assigning one bit to each of pixels corresponding to a portion of said plurality of display elements disposed in the matrix shape, and
- wherein said one bit indicates whether said display data is larger or smaller than a predetermined threshold value.
6 more elements
Dependencies are inferred from the claim text.