US 2014/0152536 A1 · Backlight Scanning Method, Backlight Scanning Device And Liquid Crystal Display Device

Abstract

There are provided a backlight scanning method and a device thereof. The method comprises: dividing an edge lighting type backlight source into an upper side optical region and a lower side optical region; turning on the light sources at the upper and lower sides respectively after the response of the liquid crystal corresponding to the pixels in the last row of the upper and lower side optical regions is stationary; turning off the light sources at the upper and lower sides respectively when the next response period of the liquid crystal corresponding to the pixels in the first row of the upper and lower side optical regions starts. The method solves the difficulties of applying the scanning backlight to the edge lighting type backlight source by respectively controlling the timings of turning on and off the light sources at the upper and lower sides, whereby the application scope of the scanning backlight is broadened.

Claims10

Dependent claims

A backlight scanning method used for a backlight source, the backlight source being an edge lighting type backlight source and comprising light sources and a light guiding element, the light sources being disposed on upper and lower sides of the light guiding element, and the light guiding element comprising an upper side optical region and a lower side optical region that are parallel to each other, the method comprising:

turning on the light sources at the upper and lower sides respectively after the response of the liquid crystal corresponding to the pixels in the last row of the upper and lower side optical regions is stationary;
and
turning off the light sources at the upper and lower sides respectively when the next response period of the liquid crystal corresponding to the pixels in the first row of the upper and lower side optical regions starts.

A backlight scanning device, comprising a driving circuit, an edge lighting type backlight source, and a backlight source control circuit, wherein

the edge lighting type backlight source comprises an upper side and a lower side optical regions, and an upper side and a lower side light sources corresponding to the upper side and the lower side optical regions respectively;
the backlight source control circuit is adapted for sending control signals to the driving circuit after the response of the liquid crystal corresponding to the pixels in the last row of the upper and lower side optical regions is stationary and when the next response period of the liquid crystal corresponding to the pixels in the first row of the upper and lower side optical regions starts;
and
the driving circuit is adapted for turning on the upper and lower side light sources according to the control signal that is sent out after the response of the liquid crystal corresponding to the pixels in the last row of the upper and lower side optical regions is stationary, and turning off the upper and lower side light sources according to the control signal that is sent out when the next response period of the liquid crystal corresponding to the pixels in the first row of the upper and lower side optical regions starts.

1 more element

Dependencies are inferred from the claim text.

Backlight Scanning Method, Backlight Scanning Device And Liquid Crystal Display Device

Life of this patent

Backlight Scanning Method, Backlight Scanning Device And Liquid Crystal Display Device

Life of this patent

Abstract

Claims10