US 2008/0291222 A1 · Pulse Generation Circuit and Display Apparatus for Adjusting the Display Brightness of an Image

Abstract

A display apparatus comprises a display panel, a gate driving circuit, and a pulse generation circuit. The display panel displays an image. The gate driving circuit drives the display panel according to a pulse signal generated by the pulse generation circuit. The pulse generation circuit comprises a histogram analysis element and a gate pulse modulator. The histogram analysis element calculates a gray level ratio of the image, and compares the gray level ratio with at least one threshold value to generate at least one control signal. The operative time of the pulse signal is determined in response to the control signal.

Claims12

Dependent claims

A pulse generation circuit for adjusting display brightness of an image, comprising:

a histogram analysis element for calculating a gray level ratio of the image and comparing the gray level ratio with a first threshold value, in which the histogram analysis element generates a first control signal when the gray level ratio is greater than the first threshold value, and the histogram analysis element generates a second control signal when the gray level ratio is not greater than the first threshold value;
and
a gate pulse modulator for generating a pulse signal, an operative time of the pulse signal being determined in response to one of the first control signal and the second control signal;
wherein the display brightness of the image is determined in response to the operative time.

1 more element

A display apparatus for adjusting display brightness of an image, comprising:

a pulse generation circuit for generating a pulse signal according to a gray level ratio of the image;
a display panel for displaying the image;
and
a gate driving circuit for driving the display panel according to the pulse signal;
wherein the display brightness of the image is determined in response to an operative time of the pulse signal.

2 more elements

Dependencies are inferred from the claim text.

Pulse Generation Circuit and Display Apparatus for Adjusting the Display Brightness of an Image

Life of this patent

Pulse Generation Circuit and Display Apparatus for Adjusting the Display Brightness of an Image

Life of this patent

Abstract

Claims12