Claims
- 1. An active matrix liquid crystal display comprising:a liquid crystal panel having a liquid crystal layer, display electrodes, and a common electrode, said liquid crystal layer being inserted between said display electrodes and said common electrode to define liquid crystal cells; a detection circuit detecting distortion of a common voltage applied to said common electrode, said common electrode having common voltage terminals, at least one of said common voltage terminals being removed from said common voltage and used to detect distortion of said common voltage; and a sample-hold circuit serving as a correction circuit and providing a correction voltage according to the magnitude of the detected distortion of said common voltage.
- 2. An active matrix liquid crystal display as claimed in claim 1, wherein said detection circuit comprises a monitoring resistor, disposed between said common electrode and an output end of said common voltage, a connection between said monitoring resistor and said common electrode being used to detect distortion of said common voltage.
- 3. An active matrix liquid crystal display comprising:a liquid crystal panel having a liquid crystal layer, display electrodes, and a common electrode, said liquid crystal layer being inserted between said display electrodes and said common electrode to define liquid crystal cells; a detection circuit detecting distortion of a common voltage applied to said common electrode; and said detection circuit comprises: a monitoring resistor, disposed between said common electrode and an output end of said common voltage, a connection between said monitoring resistor and said common electrode being based to detect distortion of said common voltage; a differential amplifier that receives a terminal voltage of wiring that connects said common electrode to the output end of said common voltage, or a terminal voltage of said monitoring resistor connected between said common electrode and the output end of said common voltage, and an output of said differential amplifier is used to detect distortion of said common voltage; and a sample-hold circuit serving as a correction circuit and providing a correction voltage according to the magnitude of the detected distortion of said common voltage.
- 4. An active matrix liquid crystal display, comprising:a liquid crystal panel having a liquid crystal layer, display electrodes, and a common electrode, said liquid crystal layer being inserted between said display electrodes and said common electrode to define liquid crystal cells and said common electrode having common voltage terminals; respective detection circuits for said common voltage terminals, each thereof detecting distortion of a common voltage applied to said common electrode; and respective correction circuits for said common voltage terminals, providing corresponding correction voltages according to the magnitude of the detected distortion of said common voltage, and the corresponding correction voltages, having different amplitudes, being applied to said common voltage terminals, respectively, to correct the distortion of said common voltage.
- 5. An active matrix liquid crystal display, comprising:a liquid crystal panel having a liquid crystal layer, display electrodes, and a common electrode, said liquid crystal layer being inserted between said display electrodes and said common electrode to define liquid crystal cells and said common electrode having common voltage terminals; a respective detection circuit for at least one of said common voltage terminals, detecting distortion of a common voltage applied to said common electrode; and a respective correction circuit for at least one of said common voltage terminals, each correction circuit providing a corresponding correction voltage according to the magnitude of the detected distortion of said common voltage and each said correction voltage being applied to said respective common voltage terminal while an uncorrected common voltage is applied to the other common voltage terminals, correction voltages having different amplitudes being applied to different said common voltage terminals, respectively, to correct the distortion of said common voltage.
- 6. A liquid crystal display comprising:a weighting unit weighting display data to be supplied to a data driver; a first adder adding a weighting value based on display data for a first scan line to a weighting value based on display data for a second scan line to be selected after said first scan line; and a second adder adding a voltage corresponding to the sum of the weighting values to a data voltage to be supplied to said data driver, to thereby cancel distortion of a common voltage.
- 7. A liquid crystal display as claimed in claim 6, wherein said liquid crystal display further comprises an adjusting unit adjusting said data voltage according to a distance between a common electrode terminal to which said common voltage is applied and a data electrode to which display data is supplied.
- 8. A liquid crystal display as claimed in claim 6, wherein said liquid crystal display further comprises an adjusting unit adjusting said data voltage or said common voltage according to a distance between a common electrode terminal to which said common voltage is applied and a scan electrode corresponding to a scan line.
- 9. A liquid crystal display comprising:weighting unit weighting display data to be supplied to a data driver; a first adder adding a weighting value based on display data for a first scan line to a weighting value based on display data for a second scan line to be selected after said first scan line; and a second adder adding a voltage corresponding to the sum of the weighting values to a common voltage, to thereby cancel distortion of said common voltage.
- 10. A liquid crystal display as claimed in claim 9, wherein said liquid crystal display further comprises an adjusting unit adjusting said data voltage or said common voltage according to a distance between a common electrode terminal to which said common voltage is applied and a scan electrode corresponding to a scan line.
- 11. A method of driving a liquid crystal display, comprising the steps of:weighting display data to be supplied to a data driver; adding a weighting value based on display data for a first scan line to a weighting value based on display data for a second scan line to be selected after said first scan line; and adding a voltage corresponding to the sum of the weighting values to a data voltage to be supplied to said data driver, to thereby cancel distortion of a common voltage.
- 12. A method of driving a liquid crystal display, comprising the steps of:weighting display data supplied to a data driver; adding a weighting value based on display data for a first scan line to a weighting value based on display data for a second scan line to be selected after said first scan line; and adding a voltage corresponding to the sum of the weighting values to a common voltage, to thereby cancel distortion of said common voltage.
- 13. A liquid crystal display comprising:a liquid crystal panel having a liquid crystal layer, display electrodes and a common electrode, said liquid crystal layer being inserted between said display electrodes and said common electrode to define liquid crystal cells; a detection circuit detecting distortion of a common voltage applied to said common electrode, said common electrode having common voltage terminals, at least one of said common voltage terminals being removed from said common voltage, and said removed common voltage terminal being used to detect distortion of said common voltage; and a sample-hold circuit serving as a correction circuit and providing a correction voltage according to the magnitude of the detected distortion of said common voltage.
- 14. A liquid crystal display comprising:a liquid crystal panel having a liquid crystal layer, display electrodes and a common electrode, said liquid crystal layer being inserted between said display electrodes and said common electrode to define liquid crystal cells; a detection circuit detecting distortion of a common voltage applied to said common electrode, said detection circuit having a monitoring resistor disposed between said common electrode and an output end of said common voltage, and a differential amplifier that receives a terminal voltage of wiring that connects said common electrode to the output end of said common voltage, or a terminal voltage of said monitoring resistor connected between said common electrode and the output end of said common voltage, a connection between said monitoring resistor and said common electrode being used to detect distortion of said common voltage, and an output of said differential amplifier being used to detect distortion of said common voltage; and a sample-hold circuit serving as a correction circuit and providing a correction voltage according to the magnitude of the detected distortion of said common voltage.
- 15. A liquid crystal display comprising:a liquid crystal panel having a liquid crystal layer, display electrodes and a common electrode, said liquid crystal layer being inserted between said display electrodes and said common electrode to define liquid crystal cells and said common electrode having common voltage terminals; a detection circuit detecting distortion of a common voltage applied to said common electrode; and a correction circuit providing a correction voltage according to the magnitude of the detected distortion of said common voltage, correction voltages having different amplitudes being applied to said common voltage terminals, respectively, to correct the distortion of said common voltage, and each of said common voltage terminals being provided with a respective said detection circuit and a respective said correction circuit.
- 16. A liquid crystal display comprising:a liquid crystal panel having a liquid crystal layer, display electrodes and a common electrode, said liquid crystal layer being inserted between said display electrodes and said common electrode to define liquid crystal cells and said common electrode having common voltage terminals; a detection circuit detecting distortion of a common voltage applied to said common electrode; and a correction circuit providing a correction voltage according to the magnitude of the detected distortion of said common voltage, correction voltages having different amplitudes being applied to said common voltage terminals, respectively, to correct the distortion of said common voltage, at least one of said common voltage terminals being provided with a respective said detection circuit and a respective said correction circuit, and a correction voltage provided by said correction circuit being applied to said common voltage terminals while an uncorrected common voltage is applied to the other common voltage terminals.
Priority Claims (3)
Number |
Date |
Country |
Kind |
4-281530 |
Oct 1992 |
JP |
|
4-297337 |
Nov 1992 |
JP |
|
5-180375 |
Jul 1993 |
JP |
|
Parent Case Info
This application is a division of application Ser. No. 08/783,788, filed Jan. 15, 1997 now pending, in turn a continuation of application Ser. No. 08/096,814, filed Jul. 28, 1993, abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
5184118 |
Yamazaki |
Feb 1993 |
|
5434599 |
Hirai et al. |
Jul 1995 |
|
5442370 |
Yamazaki et al. |
Aug 1995 |
|
Non-Patent Literature Citations (1)
Entry |
Maltese, Paolo, “Cross-Modulation and Disuniformity Reduction in the Addressing of Passive Matrix Displays,” Fourth Display Research Conference, Sep. 18-20, 1984, Paris, pp. 15-20. |
Continuations (1)
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Number |
Date |
Country |
Parent |
08/096814 |
Jul 1993 |
US |
Child |
08/783788 |
|
US |