| 摘要 |
The present invention relates to a method for controlling a light source installed in a liquid crystal display device. The present invention includes a liquid crystal display panel (60) for displaying an image by virtue of having liquid crystals whose orientation changes in response to application of a voltage; a backlight unit (70) with a built-in PWM light modulation type LED (71) for emitting light to be supplied to the liquid crystal display panel; and a control unit (1) for controlling the liquid crystal display panel and the backlight unit. In cases where the response speed (Vr) of liquid crystal molecules (61M) is relatively high (Vr2), the LED (71) is driven at a relatively low drive frequency (FQ[PWM]1), whereas in cases where the response speed (Vr) of the liquid crystal molecules (61M) is relatively low (Vr1), the LED (71) is driven at a relatively high drive frequency (FQ[PWM]2). According to the present invention, problems with image quality that tend to occur depending on the degree of tilting of the liquid crystal molecules (ghost outlines) are prevented. The present invention is used, for example, in a VA-IPS mode liquid crystal display device. |
