Liquid crystal display
View Patent ↗The LCD device includes a pixel circuit and a driving circuit. The pixel circuit comprises thin film transistors serving for driving pixels of the LCD The driving circuit is coupled to the pixel circuit, generating a driving signal for driving the transistors. The gate terminal driving signal of the pixel transistors has a high state and a low state, and the threshold voltage of the transistor is set at a level at zero volt, or depending on whether the transistor is n-type or p-type, between zero volt and the low or high states of the gate terminal driving signal, respectively.
1. A circuit for driving a pixel in a liquid crystal display (LCD) device, comprising:
a pixel circuit, having a thin film transistor of n-type or p-type, operatively coupled to the pixel; and
a driving circuit, operatively coupled to the pixel circuit, generating a gate terminal driving signal having a low and high state for driving the thin film transistor,
wherein if the transistor is n-type, its threshold voltage is set at a level between the low state of the gate terminal driving signal and no more than zero volt, and wherein if the transistor is p-type, its threshold voltage is set at a level between the high state of the gate terminal driving signal and no less than zero volt.
2. The circuit of claim 1 , wherein the transistor is an NMOS transistor.
3. The circuit of claim 1 , wherein the transistor is a PMOS transistor.
4. The circuit of claim 1 , wherein the pixel is of low temperature poly-silicon type.
5. A liquid crystal display device comprising:
at least one liquid crystal display pixel; a circuit as in claim 1 .
6. The liquid crystal display device as in claim 5 , wherein the liquid crystal display pixel is of low temperature poly-silicon typ.
7. An electronic device, comprising:
a liquid crystal display device as in claim 5 ,
a controller providing image data the liquid crystal display device.
8. The electronic device as in claim 7 , wherein the liquid crystal display device is of low temperature poly-silicon type.
9. The method as in claim 8 , wherein the pixel is of low-temperature poly-silicon type.
10. A method of driving a pixel in a liquid crystal display (LCD) device, comprising:
operatively coupling a thin film transistor of n-type or p-type to the pixel; and generating a gate terminal driving signal hating a low and high state to drive the thin film transistor, wherein if the transistor is n-type, its threshold voltage is set at a level between the low state of the gate terminal driving signal and no more than zero volt, and wherein if the transistor is p-type, its threshold voltage is set at a level between the high state of the gate terminal driving signal and no less than zero volt.
11. A circuit for driving a pixel in a liquid crystal display (LCD) device, comprising:
a pixel circuit, having a thin film transistor of n-type or p-type, operatively coupled to the pixel; and
a driving circuit, operatively coupled to the pixel circuit, generating a gate terminal driving signal having a low and high stats for driving the thin film transistor,
wherein if the transistor is n-type, the transistor has a threshold voltage that is set between no more than zero volt and the low state of the gate terminal driving signal, or if the transistor is p-type, the transistor has a threshold voltage that is set at a level of between no less than zero volt and the high state of the gate terminal driving signal.
12. The circuit of claim 11 , wherein the transistor is an NMOS transistor.
13. The circuit of claim 11 , wherein the transistor is a PMOS transistor.