Pumping circuit and flat panel display device
AssigneeKabushiki Kaisha Toshiba
InventorsYasushi Sasaki, Masaki Miyatake, Hajime Sato, Takanori Tsunashima, Yasuyuki Hanazawa, Hoko Hirai
Life of this patent
Estimating the term…
Abstract
In a flat panel display device in which driving circuits and the like are arranged on an array substrate, a technology to realize a compact size and a low cost of an external control circuit is disclosed. At least one pumping circuit included in the external control circuit is arranged on the array substrate, and an output side capacitor connected between an output portion of the pumping circuit and the ground GND and an input side capacitor of a clock input portion are arranged outside the array substrate.
Claims15
A flat panel display device comprising:
- a first substrate including a pluraltiy of scanning lines, and a plurality of signal lines intersecting the scanning lines, a switching element arranged on an intersection point of each of the scanning lines and the signal lines, a pixel electrode connected to said switching element;
- a second substrate including an opposite electrode opposite to said pixel electrode;
- a display layer held between said first and second substrates;
- a data driver which supplies a data signal to each of said signal lines;
- and
- a scan driver which supplies a scanning signal to each of said scanning lines,
- wherein a control signal and a power source voltage are supplied from an external control circuit to said data driver and said scan driver, and
- wherein at least one pumping circuit having TFTs is arranged on said first substrate, and a first capacitor connected to a clock input portion of said pumping circuit and a second capacitor connected between an output portion and the ground are arranged outside said first substrate.
A flat panel display device comprising:
- a first substrate including a plurality of scanning lines, and a plurality of signal lines intersecting the scanning lines, a switching element arranged on an intersection point of each of the scanning lines and the signal lines, a pixel electrode connected to said pixel electrode;
- a second substrate including an opposite electrode opposite to said pixel electrode;
- a display layer held between said first and second substrates;
- a data driver which supplies a data signal to each of said signal lines;
- and
- a scan driver which supplies a scanning signal to each of said scanning lines,
- wherein a control signal and a power source voltage are supplied from an external control circuit to said data driver and said scan driver, and wherein at least one pumping circuit having TFTs is arranged in a region opposite to a region in which said scan driver on said first substrate is arranged.
Dependencies are inferred from the claim text.