Display driving apparatus and display apparatus module
First Claim
1. A display driving apparatus, in which a plurality of types of driving voltages that vary depending on display data are outputted to display means from a plurality of output terminals via low impedance output means, wherein:
- each of the low impedance output means is connected with the plurality of output terminals via switch means, and the low impedance output means is shared by the plurality of output terminals in response to the switch means.
2 Assignments
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Accused Products
Abstract
A display driving apparatus in accordance with the present invention outputs a plurality of types of driving voltages that vary depending on display data to display device from a plurality of output terminals for liquid crystal driving voltages via voltage follower circuits. Each of the voltage follower circuits is connected with the output terminals for liquid crystal driving voltages via an analog switch circuit. The analog switch circuit is shared by the output terminals for liquid crystal driving voltages in accordance with the switching of the analog switch circuit. This allows to suppressing the increasing in the circuit scale with the increasing in the number of terminals and the increasing of the power consumption.
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Citations
18 Claims
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1. A display driving apparatus, in which a plurality of types of driving voltages that vary depending on display data are outputted to display means from a plurality of output terminals via low impedance output means, wherein:
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each of the low impedance output means is connected with the plurality of output terminals via switch means, and the low impedance output means is shared by the plurality of output terminals in response to the switch means. - View Dependent Claims (3, 8)
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2. A display driving apparatus comprising:
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voltage generation means for generating a variety of types of voltages that drive display means in accordance with display data;
a plurality of output terminals;
voltage selection means for selecting and outputting one driving voltage for every output terminal among the plurality of types driving voltages in accordance with the display data;
low impedance output means having a low output impedance;
switch means for connecting or disconnecting each of the low impedance output means with or from the voltage selection means and the plurality of output terminals; and
switch control means for controlling in a time-sharing manner the switch means so that the low impedance output means is successively connected with one of the plurality of output terminals. - View Dependent Claims (4, 5, 6, 7, 9)
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10. A display apparatus module comprising a display driving apparatus,
the display driving apparatus outputting a plurality of types of driving voltages that vary depending on display data to a display means from a plurality of output terminals via low impedance output means, each of the low impedance output means being connected with the plurality of output terminals via a switch means, and the low impedance output means being shared by the plurality of output terminals in response to the switch means.
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11. A display apparatus module comprising a display driving apparatus, the display driving apparatus including:
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voltage generation means for generating a variety of types of voltages that drive display means in accordance with display data;
a plurality of output terminals;
voltage selection means for selecting and outputting one driving voltage for every output terminal among the plurality of types driving voltages in accordance with the display data;
low impedance output means having a low output impedance;
switch means for connecting or disconnecting each of the low impedance output means with or from the voltage selection means and the plurality of output terminals; and
switch control means for controlling in a time-sharing manner the switch means so that the low impedance output means is successively connected with one of the plurality of output terminals. - View Dependent Claims (13, 14, 15, 16, 18)
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Specification