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| Number | Title | Issue Date |
| 4385294 | RMS Voltage control with variable duty cycle for matching different liquid crystal display materials A method and system for driving a liquid crystal display (LCD) with adjustable drive voltages to match selected ones of a number of different liquid crystal materials utilize variable duty cycle control. Instead of regulating the battery supply voltage to... | 05/24/1983 |
| 4257045 | RMS voltage control with variable duty cycle for matching different liquid crystal display materials A method and system for driving a liquid crystal display (LCD) with adjustable drive voltages to match selected ones of a number of different liquid crystal materials utilize variable duty cycle control. Instead of regulating the battery supply voltage to... | 03/17/1981 |
