Circuit for driving a display device
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorKouichirou Satou
Life of this patent
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Abstract
A drive circuit for a display device comprises a first input terminal adapted to be connected to receive a drive signal for driving a display device, a second input terminal adapted to be connected to receive a control signal for controlling the driving of the display device, an exclusive OR gate connected to receive the drive signal and the control signals supplied to the input terminals, and an MOS transistor which is turned on and off according to the output level of the OR gate.
Claims24
A drive circuit for driving an LED display device comprising:
- a first input terminal for receiving a high level voltage drive signal;
- a second input for receiving a pulsing control signal;
- a logic gate for providing an EXCLUSIVE OR of said drive signal and control signal;
- and
- a switching transistor element connected between said display device and a reference potential, said transistor element being turned on according to the output of said logic gate.
A drive circuit for driving a fluorescent display device comprising:
- a first input terminal for receiving a low level voltage drive signal;
- a second input terminal for receiving a pulsing control signal;
- a logic gate providing an EXCLUSIVE OR of said drive and control signals;
- and
- a switching transistor element connected between said display device and a reference potential, said switching transistor being turned on according to the output level of said logic gate.
A drive circuit for driving an LCD display device comprising:
- a first input terminal for receiving an AC voltage drive signal;
- a second input terminal for receiving a pulsing control signal;
- a first output terminal providing said AC voltage drive signal to one end of said LCD display device;
- a logic gate providing an EXCLUSIVE OR of said drive and control signals;
- and
- a switching transistor element being turned on according to the output level of said logic gate, said switching transistor element being connected between a reference potential and a second output terminal connected to the other end of said LCD display device.
A method for operating a drive circuit for an LED display device, comprising the steps of:
- supplying, as a drive signal to a drive terminal of said circuit, a high level signal;
- supplying, as a control signal to a control terminal of said drive circuit, a pulsing control signal;
- providing an EXCLUSIVE OR of said drive and control signals;
- and
- driving said LED display device according to the results of said EXCLUSIVE OR operation.
A method for operating a drive circuit for a fluorescent display device comprising the steps of:
- supplying, as a drive signal to a drive terminal of said circuit, a low level signal;
- supplying, as a control signal to a control terminal of said drive circuit, a pulsing control signal;
- providing an EXCLUSIVE OR of said drive and said control signals;
- and
- driving said fluorescent display device according to the results of said EXCLUSIVE OR operation.
A method for operating a drive circuit for an LCD display device comprising the steps of:
- supplying, as a drive signal to a drive terminal of said circuit, an AC voltage signal;
- supplying, to a first side of said display device, said AC voltage signal;
- supplying, as a control signal to a control terminal of said drive circuit, a pulsing control signal;
- providing an EXCLUSIVE OR of said drive and control signals;
- and
- driving said display device by providing to a second side of said display device a signal representing the results of said EXCLUSIVE OR operation.
Dependencies are inferred from the claim text.