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US 7,612,770 B2Granted
Systems for displaying images
AssigneeTPO Displays Corp.
InventorChing-Hone Lee
Life of this patent
Estimating the term…
Abstract
Systems for displaying images are provided. A representative system comprises a signal driving circuit comprising a plurality of shift registers connected in series and controlled only by a first clock and a second clock, generating corresponding driving pulses in turn in response to a start pulse. Each shift register comprises a pulse generation unit with a first clock input terminal receiving one of the first and the second clocks and a first power terminal coupled to a first power voltage, and a leakage protection unit coupled to the pulse generation unit, electrically separating the first power voltage from the received clock at the first clock input terminal.
Claims19
A system for displaying images, comprising:
- a signal driving circuit comprising:
- a plurality of shift registers connected in series and controlled only by a first clock and a second clock, and operative to generate corresponding driving pulses in turn in response to a start pulse, wherein each of the shift registers comprises:
- a pulse generation unit with a first clock input terminal and operative to receive one of the first and the second clocks and a first power terminal coupled to a first power voltage;
- and
- a leakage protection unit coupled to the pulse generation unit, electrically separating the first power voltage from a clock signal received from the first clock and the second clock at first clock input terminal, wherein the leakage protection unit comprises:
- a first switching element comprising a first coupled to the first power terminal, a control terminal coupled to the start pulse, and a second terminal;
- a second switching element comprising a first terminal coupled to the second terminal of the switching element, and a second terminal coupled to a first node;
- a third switching element comprising a first terminal coupled to the first node, and a control terminal and a second terminal both coupled to the second clock input terminal;
- and
- a fourth switching element coupled between the first rower voltage on the first rower terminal and the received clock by the first clock input terminal in the pulse generation unit, and comprising a control terminal coupled to the first node.
7 more elements
A system for displaying images, comprising:
- a signal driving circuit comprising:
- a plurality of shift registers connected in series, generating corresponding driving pulses in turn in response to a start pulse, wherein each shift register comprises:
- a pulse generation unit powered by a first power voltage and a second power voltage and coupled, with respect to clocks, only to a first clock and a second clock, wherein the pulse generation unit comprises:
- a first switching element comprising a first terminal coupled to the first power voltage, and a second terminal;
- and
- a second switching element comprising a control terminal and a first terminal both coupled to the first clock or the second clock;
- and a second terminal;
- and
- a leakage protection unit coupled to the pulse generation unit, and configured to electrically separate the first and second power voltages from the first clock and alternately from the second clock, wherein the pulse generation unit comprises a third switching element coupled between the second terminal of the first switching element and the second terminal of the second switching element to element according to the start pulse, thereby separating the first power voltage from the first clock or the second clock at the first terminal of the second switching element.
6 more elements
A system for displaying images, comprising:
- a signal driving circuit controlled by only a first clock and a second clock to generate a plurality of driving pulses in turn according to a start pulse, wherein the signal driving circuit comprises:
- a first shift register comprising a first clock input terminal operative to receive a signal from the first clock, a second clock input terminal operative to receive a signal from the second clock, a power terminal coupled to a first power voltage, an input terminal, and an output terminal operative to output a corresponding driving pulse;
- and
- a second shift register comprising a first clock input terminal operative to receive a signal from the second clock, a second clock input terminal operative to receive a signal from the first clock, and an input terminal coupled to the output terminal of the first shift register, in which the first and the second shift registers each comprises:
- a pulse generation unit powered by the first power voltage and a second power voltage and coupled, with respect to clocks, only to the first clock and the second clock, wherein the pulse generation unit comprises:
- a first switching element comprising a first terminal coupled to the first power terminal, and a second terminal;
- and
- a second switching element comprising a control terminal and a first terminal both coupled to the first clock or the second clock;
- and a second terminal;
- and
- a leakage protection unit operative to electrically separate the first power voltage from the signal received at the first clock input terminal responsive to receiving either of the start pulse or the corresponding driving pulse, wherein the leakage protection unit comprises a third switching element coupled between the second terminal of the first switching element coupled between the second terminal of the first switching element and the second terminal of the second switching element to electrically disconnect the first and second switching element according to either of the start pulse or the corresponding driving pulse, thereby separating the first power voltage from the first clock or the second clock at the first terminal of the second switching element.
8 more elements
Dependencies are inferred from the claim text.