Display device
AssigneeHitachi Displays, Ltd.
InventorToshio Miyazawa
Life of this patent
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Abstract
The present invention enables a color display of high numerical aperture and multiple gray scales which can realize the multicoloring and area gray scales by simplifying the circuit constitution. A pair of transistors which hold video signals by bridging alternating power supply sources are also used as an output circuit to a pixel electrode and a capacitance is connected to the pixel electrode whereby the data writing state is controlled by making use of charge stored in the capacitance CB.
Claims7
A display device including a plurality of scanning lines and a plurality of signal lines which are arranged to cross the plurality of scanning lines and forming each pixel corresponding to a region surrounded by the plurality of scanning lines and the plurality of signal lines, wherein
- the pixel is included a pixel electrode, a switching element for selecting the pixel electrode, and a storage circuit which is formed between the pixel electrode and the switching element and stores data to be written in the pixel electrode,
- the storage circuit is configured such that a pair of alternating voltage power source lines capable of applying alternating voltages which change with polarities opposite to each other are connected to the storage circuit and the storage circuit has a first pair of transistors consisting of an NMOS transistor and a PMOS transistor which are connected in series by bridging the pair of alternating voltage power source lines and a second pair of transistors including an NMOS transistor and a PMOS transistor which are connected in series by bridging the pair of alternating voltage power source lines with respect to the first pair of transistors,
- a common connection point of control electrodes of the first pair of transistors is connected to a series connection intermediate point of the second pair of transistors, and a common connection point of control electrodes of the second pair of transistors is connected to a series connection intermediate point of the first pair of transistors,
- an output point of the switching element is connected to a connection point of the first pair of transistors,
- the series connection intermediate point of the second pair of transistors is connected to the pixel electrode, and
- a capacitance is connected between the common connection point of the control electrodes of the second pair of transistors and the series connection intermediate point.
A display device including a plurality of scanning lines and a plurality of signal lines which are arranged to cross the plurality of scanning lines and forming each pixel corresponding to a region surrounded by the plurality of scanning lines and the plurality of signal lines, wherein
- the pixel includes a switching element which is arranged corresponding to each crossing point of the scanning line and the signal line and a pixel electrode,
- a circuit which holds video signals from the signal line and outputs the holding video signals to the pixel electrode is arranged between the switching element and the pixel electrode, and
- a capacitance is connected to the pixel electrode so as to control a writing state into a SRAM in the inside of the pixel based on charge stored in a capacity.
Dependencies are inferred from the claim text.