Correction method for auto brightness control light sensors in liquid crystal displays
OwnerChia-Yang Lininventor
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Abstract
A correction method for auto brightness control light sensors in liquid crystal displays (LCDs). The disclosed method contains at least the following steps: Establish a correspondence range table of environmental brightness and LCD panel brightness. The light sensor generates an input voltage signal. The input voltage signal is output to a voltage control oscillator, which then outputs an output frequency. A correspondence range is then provided and the maximum, mean value and minimum are set. Finally, the output frequency is output to a microprocessor according to the correspondence range table. A control signal is output to correct the brightness of the back-light panel of the LCD.
Claims7
A correction method for auto brightness control light sensors of liquid crystal displays (LCDs), which comprises the steps of:
- establishing a correspondence range table of environmental brightness and LCD panel brightness;
- generating an input voltage signal using the light sensor;
- entering the input voltage signal to a voltage control oscillator (VCO) and generating an output frequency;
- selecting a correspondence range and determining a maximum, a mean value, and a minimum;
- and
- inputting the output frequency to a microprocessor in accordance with the correspondence range table and outputting a control signal to control and correct the brightness of the LCD back-light panel.
Dependencies are inferred from the claim text.