Novatek Microelectronics Corp.

Yi-Te Liu

Chih-Jen Yen

Chih-Yuan Hsieh

Wei-Chih Wang

Chen-Ming Hung

Lan-Shan Cheng

A light source apparatus and a light source adjusting module are provided. The light source apparatus includes a power supply, a phase modulator, an electrical transformer, a light source adjusting module and a light-emitting device. The power supply provides a first AC voltage signal. The phase modulator receives the first AC voltage signal and adjusts a conducting phase of the first AC voltage signal to generate a modulated AC voltage signal. The electrical transformer transforms the modulated AC voltage signal to generate a second AC voltage signal. The light adjusting module generates a luminance adjusting signal according to a state of the second AC voltage signal. The light-emitting device receives the luminance adjusting signal to generate a corresponding light source.

Light source apparatus and light source adjusting module

An LED illuminant driving circuit and an automatic brightness compensation method thereof are provided herein. The automatic brightness compensation method includes: providing a target value; detecting an operation period of a pulse of an output of the LED illuminant driving circuit, the pulse is adapted to an LED illuminant for making the light emitting; deciding a peak value according to the target value and the operation period; and setting a peak level of the pulse according to the peak value. The LED illuminant driving circuit and the automatic brightness compensation method thereof provides a stable average current/voltage to the LED illuminant and avoids brightness variations of the light emitting.

LED illuminant driving circuit and automatic brightness compensation method thereof

A light adjusting device for a light emitting diode includes a switch, a detecting unit and an illumination adjusting unit. The switch is coupled to a power terminal, which is utilized for providing power for the light emitting diode. The detecting unit is coupled to the switch, and is utilized for determining a status of the switch, so as to generate a detecting result. The illumination adjusting unit is coupled to the detecting unit, and is utilized for adjusting illumination of the light emitting diode according to the detecting result.

Light adjusting device for a light emitting diode and related light adjusting method and light emitting device

A method for eliminating deficient image on a liquid crystal display (LCD) is provided. The method is used for eliminating the deficient image generated during the shutdown period in a normally white LCD. The method comprises the following steps. First, when a power indication signal changes from a first state to a second state, a black frame is displayed in a first period of time. At the end of the first period, a white frame is displayed in a second period of time. At the end of the second period, the supply of a negative scan voltage is stopped and a white frame is displayed in a third period of time. At the end of the third period, the power is turned off.

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Hsinchu County, Taiwan

Yi-Te Liu