Display device
AssigneeSanyo Electric Co., Ltd.
InventorMichiru Senda
Life of this patent
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Abstract
In a display device, clock supplying transistors turn on and off in response to a digital image signal retained in capacitance elements fed from drain signal lines through pixel element selection transistors. The image signal is applied to capacitance electrodes through the clock supplying transistors. Voltages change at the pixel element electrodes according to the value of the digital image signal. Therefore, a DA conversion is possible at the pixel element portion, leading to simplification of the peripheral circuit configuration around pixel element portions and the reduction of the framing area of the panel.
Claims15
A display device comprising:
- a pixel element portion;
- a pixel element electrode receiving an analog image signal, the pixel element electrode being disposed in the pixel element portion;
- and
- a DA converter converting a digital image signal to the analog image signal, the DA converter being disposed in the pixel element portion.
A display device comprising:
- a gate signal line;
- a pixel element portion;
- a plurality of pixel element selection transistors each selecting the pixel element portion in response to a scanning signal inputted from the gate signal line;
- a drain signal line receiving a digital image signal;
- a data retaining portion retaining the digital image signal inputted through the pixel element selection transistors;
- a pixel element electrode;
- a plurality of capacitance electrodes each forming a capacitance coupling with the pixel element electrode based on respective predetermined weighed capacitance ratios;
- and
- a clock supplier portion for supplying a cyclical clock signal to the capacitance electrodes in response to the digital image signal retained in the data retaining portion;
- wherein the selection transistors, the data retaining portion, the pixel element electrode, the capacitance electrodes and the clock supplier portion are disposed in the pixel element portion.
A display device comprising:
- a plurality of pixel elements;
- and
- a plurality of pixel element electrodes disposed in the respective pixel elements, each of the pixel element electrodes facing a plurality of a capacitance electrodes electrically insulated from the pixel element electrode and each forming capacitance coupling with the corresponding pixel element electrode based on respective predetermined weighed capacitance ratios;
- wherein a voltage applied to each pixel element electrode is changed by applying a voltage corresponding to a digital image signal to each of the capacitance electrodes of the corresponding pixel element electrode.
A display device comprising;
- a plurality of pixel elements;
- a plurality of pixel element electrodes disposed in the respective pixel elements, each of the pixel element electrodes facing a plurality of capacitance electrodes electrically insulated from the pixel element electrode and each forming a capacitance coupling with the pixel element electrode based on respective predetermined weighed capacitance ratios;
- a plurality of clock supplier portions supplying a cyclic clock signal in response to a digital image signal to the capacitance electrodes, the clock supplier portions being disposed in the corresponding pixel elements;
- a plurality of clock signal selection portions selecting the clock signal according to a voltage corresponding to the highest bit of the digital image signal, the clock signal selection portions being disposed in the corresponding pixel elements;
- and
- a plurality of reset signal supplier portions selecting a reset signal and supplying the reset signal to the corresponding pixel element electrodes according to a voltage corresponding to the highest bit of the digital image signal, the reset signal supplier portions being disposed in the corresponding pixel elements.
Dependencies are inferred from the claim text.