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AssigneeSharp Kabushiki Kaisha
InventorsYasutomo Nishihara, Hideo Tohdoh, Kohichi Ohhara, Takuya Handa, Kohji Michibayashi
Estimating the term…
A liquid crystal display device including a display unit, a backlight including a plurality of light sources, an LED control circuit configured to output a PWM signal (LED control signal) based on a display synchronization signal, such that the light sources are intermittently lighted, and an LED driver configured to control a drive current that is supplied to the light sources, based on the PWM signal, is provided with a monitoring control unit that is configured to perform monitoring at least one of the PWM signal, the drive current, and the display synchronization signal, as a monitoring target. When an abnormality of the monitoring target is detected, the monitoring control unit controls a waveform of the PWM signal such that the drive current that is supplied to the light sources in the backlight becomes zero.
A liquid crystal display device comprising:
A control method of a liquid crystal display device including a display unit configured to display an image, a light source configured to radiate light on the display unit, a light source control unit configured to output a PWM signal with a constant duty ratio based on a display synchronization signal, such that the light source is intermittently lighted, and a light source drive unit configured to control a drive current that is supplied to the light source, based on the PWM signal outputted from the light source control unit, the control method comprising the steps of:
Dependencies are inferred from the claim text.