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US 6,639,576 B2Granted
Display device
AssigneeHitachi, Ltd.
InventorsToshio Miyazawa, Tomohiko Sato
Life of this patent
Estimating the term…
Abstract
A display device includes a latch circuit storing digital data, a converter circuit converting the digital data stored in the latch circuit to an analog signal, a voltage regenerating circuit inputting the analog signal and outputting a video signal, and an image signal line supplied the video signal. The voltage regenerating circuit includes six TFTs wherein the TFTs are connected in a particular manner.
Claims19
A display device comprising:
- a latch circuit storing digital data;
- a converter circuit converting the digital data stored in the latch circuit to an analog signal;
- a voltage regenerating circuit inputting the analog signal and outputting a video signal;
- and
- an image signal line supplied with the video signal;
- wherein the voltage regenerating circuit comprises a first TFT connected to a first node which is supplied with a first voltage and a second node which is supplied with the analog signal, and a control terminal of the first TFT is inputted with a first timing control signal, a second TFT which is a first conductive type connected to the second node and a third node, and a control terminal of the second TFT is inputted with a second timing control signal, a third TFT connected to the third node and a fourth node, and a control terminal of the third TFT is connected to the second node, a fourth TFT which is a second conductive type connected to the fourth node and a fifth node which is supplied with a second voltage, and a control terminal of the fourth TFT is inputted with the second timing control signal, a fifth TFT which is the first conductive type connected to a sixth node which is supplied with a third voltage and the third node, and a control terminal of the fifth TFT is inputted with a third timing control signal, and a sixth TFT which is the second conductive type connected to the fourth node and a seventh node supplying the video signal to the image signal line, and a control terminal of the sixth TFT is inputted with the third timing control signal.
3 more elements
A display device comprising:
- a latch circuit storing digital data;
- a plurality of converter circuits converting the digital data stored in the latch circuit to a plurality of analog signals;
- a plurality of voltage regenerating circuits inputting the plurality of analog signals and outputting a plurality of video signals;
- and
- a plurality of image signal lines supplied the plurality of video signals;
- wherein each of the voltage regenerating circuits comprises a first TFT connected to a first node which is supplied with a first voltage and a second node which is supplied with one of the plurality of analog signals, and a control terminal of the first TFT is inputted with a first timing control signal, a second TFT which is a first conductive type connected to the second node and a third node, and a control terminal of the second TFT is inputted with a second timing control signal, a third TFT connected to the third node and a fourth node, and a control terminal of the third TFT is connected to the second node, a fourth TFT which is a second conductive type connected to the fourth node and a fifth node which is supplied with a second voltage, and a control terminal of the fourth TFT is inputted with the second timing control signal, a fifth TFT which is the first conductive type connected to a sixth node which is supplied with a third voltage and the third node, and a control terminal of the fifth TFT is inputted with a third timing control signal, and a sixth TFT which is the second conductive type connected to the fourth node and a seventh node supplying one of the plurality of video signals to one of the plurality of image signal lines, and a control terminal of the sixth TFT is inputted with the third timing control signal.
3 more elements
A display device comprising:
- a latch circuit storing digital data;
- a plurality of converter circuits converting the digital data stored in the latch circuit to a plurality of analog signals;
- a plurality of voltage regenerating circuits inputting the plurality of analog signals and outputting a plurality of video signals;
- and
- a plurality of image signal lines supplied with the plurality of video signals;
- wherein each of the voltage regenerating circuits comprises a first TFT connected to a first node which is supplied with a first voltage and a second node, and a control terminal of the first TFT is inputted with a first timing control signal, a second TFT which is a first conductive type connected to the second node and a third node, and a control terminal of the second TFT is inputted with a second timing control signal, a third TFT connected to the third node and a fourth node, and a control terminal of the third TFT is connected to the second node, a fourth TFT which is a second conductive type connected to the fourth node and a fifth node which is supplied with one of the plurality of analog signals, and a control terminal of the fourth TFT is inputted with the second timing control signal, a fifth TFT which is the first conductive type connected to a sixth node which is supplied with a second voltage and the third node, and a control terminal of the fifth TFT is inputted with a third timing control signal, and a sixth TFT which is the second conductive type connected to the fourth node and a seventh node supplying one of the plurality of video signals to one of the plurality of image signal lines, and a control terminal of the sixth TFT is inputted with the third timing control signal.
3 more elements
Dependencies are inferred from the claim text.