Patent ID: 9583050
Date: 2017-02-28
CPC Classifications: G09G

Claim:
1. A display apparatus comprising: a receiving module configured to receive a pulse width modulating (PWM) signal from an external component; a processing module configured to process the PWM signal in a predetermined time duration; a selecting module connected to the receiving module and the processing module, and the selecting module is configured to output, based upon different input signals from the receiving module and the processing module, different signals; a power circuit electronically connected to the selecting module, and configured to generate a driving current, the generated driving current being based on the received signal from the selecting module; and a backlight module connected to the power circuit, and configured to emit lights based on the received driving current; wherein the processing module comprises an operating unit, a PWM generating unit connected with the operating unit and the selecting module, and a timing unit connected with the PWM generating unit and the receiving module; the operating unit calculates a working cycle of the received PWM signal in a first time duration; the PWM unit generates a timing signal when receiving the calculated working cycle and adjusts the PWM signal to form a signal with the calculated working cycle; the timing unit times a duration of waiting in response to the timing signal, and generates a selecting signal when the duration of waiting exceeds a second time duration; wherein the selecting module generates the unadjusted PWM signal to the power circuit in the predetermined time duration while the processing module processing the PWM signal, the power circuit generates a first driving current for driving the backlight module based on the unadjusted PWM signal.