Display device
AssigneeHitachi Displays, Ltd.
InventorsKozo Yasuda, Toshio Miyazawa, Hiroyuki Abe
Life of this patent
Estimating the term…
Abstract
In a display device which arranges a memory part for every display pixel, an erroneous operation of the memory part and the power consumption can be reduced. In a display device provided with a display panel which includes a plurality of display pixels, video lines which apply video data to the display pixels, and scanning lines which apply a scanning voltage to the display pixels, the display pixel includes a memory part which stores the video data, a pixel electrode, and a switching part which selectively applies a first video voltage or a second video voltage which differs from the first video voltage to the pixel electrode in response to the video data stored in the memory part.
Claims14
A display device comprising a display panel including a plurality of display pixels, video lines which apply video data to the display pixels, scanning lines which apply a scanning voltage to the display pixels, a video line address circuit, and a scanning line address circuit,
- wherein each of the display pixels includes:
- a memory part which stores the video data;
- a pixel electrode;
- and
- a switching part which selectively applies a first video voltage or a second video voltage which differs from the first video voltage to the pixel electrode in response to the video data stored in the memory part,
- wherein in a state that the video data stored in the memory part is held, the memory part includes a first inverter circuit which has an input terminal thereof connected to a first node and an output terminal thereof connected to a second node, and a second inverter circuit which has an input terminal thereof connected to the second node and an output terminal thereof connected to the first node,
- wherein each of the display pixels further includes a first switching element which is turned off when a non-selective scanning voltage is applied to the scanning line, and is turned on when a selective scanning voltage is applied to the scanning line and applies the video data which is applied to the video line to the first node, and a second switching element which is connected between the first node and the output terminal of the second inverter circuit, and is turned off when the selective scanning voltage is applied to the scanning line, and is turned on when the non-selective scanning voltage is applied to the scanning line,
- wherein the switching part includes a third switching element which has a gate thereof connected to the first node, has a first terminal thereof to which the first video voltage is supplied, and has a second terminal thereof connected to the pixel electrode, and a fourth switching element which has a gate thereof connected to the second node, has a first terminal thereof to which the second video voltage is supplied, and has a second terminal thereof connected to the pixel electrode, and a conductive type of the third switching element and a conductive type of the fourth switching element are equal, and
- wherein the video line address circuit selects the display pixel to which the video data is to be written, and the scanning line address circuit selects the scanning line to which the scanning voltage is to be supplied.
A display device comprising a display panel including a plurality of display pixels, data lines which apply a data to the display pixels, video lines which is selected as an address inputted the data, scanning lines which apply a scanning voltage to the display pixels, a video line address circuit, and a scanning line address circuit,
- wherein each of the display pixels includes:
- a memory part which stores the data;
- a pixel electrode;
- and
- a switching part which selectively applies a first video voltage or a second video voltage which differs from the first video voltage to the pixel electrode in response to the data stored in the memory part,
- wherein in a state that the data stored in the memory part is held, the Memory part includes a first inverter circuit which has an input terminal thereof connected to a first node and an output terminal thereof connected to a second node, and a second inverter circuit which has an input terminal thereof connected to the second node and an output terminal thereof connected to the first node,
- wherein each of the display pixels further includes a first switching element which is turned off when a non-selective scanning voltage is applied to the scanning line, and is turned on when a selective scanning voltage is applied to the scanning line and applies the data which is applied to the data line to the first node, and a second switching element which is connected between the first node and the output terminal of the second inverter circuit, and is turned off when the selective scanning voltage is applied to the scanning line, and is turned on when the non-selective scanning voltage is applied to the scanning line,
- wherein the switching part includes a third switching element which has a gate thereof connected to the first node, has a first terminal thereof to which the first video voltage is supplied, and has a second terminal thereof connected to the pixel electrode, and a fourth switching element which has a gate thereof connected to the second node, has a first terminal thereof to which the second video voltage is supplied, and has a second terminal thereof connected to the pixel electrode, and a conductive type of the third switching element and a conductive type of the fourth switching element are equal,
- wherein the video line address circuit selects the display pixel to which the data is to be written, and the scanning line address circuit selects the scanning line to which the scanning voltage is to be supplied, and
- wherein each of the display pixels further includes a fifth switching element which has a gate thereof connected to the video line, has a first terminal thereof to which the data is supplied, and has a second terminal thereof connected to the first switching element.
Dependencies are inferred from the claim text.