DISPLAY DEVICE WITH BACKLIGHT LOCAL AREA ILLUMINATION CONTROL CIRCUIT

• US 20100109997A1
• Filed: 11/06/2008
• Published: 05/06/2010
• Est. Priority Date: 11/06/2008
• Status: Abandoned Application

• Current Assignee: Getac Technology Company Limited (MiTAC Holdings Corp.)
• Original Assignee: Mitac Technology Corporation (MiTAC Holdings Corp.)
• Inventors: Chen, Yu-Ming, Fan, Yung-Kang
• Application Number:
  US12/266,544
• Publication Number:
  US 20100109997A1
• Time in Patent Office: Days
• US Class Current: 345/102
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/3426 the different display panel areas being distributed in two dimensions, e.g. matrix

Abstract

Disclosed is a display device with a backlight local area illumination control circuit, which employs a backlight local area illumination control circuit to control an illumination zone of the backlight module of the display device. The backlight local area illumination control circuit includes a plurality of illuminants, an illuminant controller, and an illuminant driving circuit. Based on a backlight illumination zone selection signal received, the illuminant controller selectively drives the illuminants of the backlight module so as to form a local illumination zone in the backlight module corresponding to a local displaying area in which a target image is to be displayed on the global displaying area to have the target image displayed in the local displaying area of the display device.

Claims

1. A display device with a backlight local area illumination control circuit, the display device comprising a display panel and a backlight module and employing the backlight local area illumination control circuit to control an illumination zone of the backlight module, the backlight local area illumination control circuit comprising:

a plurality of illuminants, which are arranged in a matrix form in the backlight module corresponding to the display panel so that each illuminant generates and projects light toward the display panel to define a global illumination zone in the display panel corresponding to a global displaying area;

an illuminant driving circuit, which is connected to the illuminants of the backlight module; and

an illuminant controller, which is connected to the illuminant driving circuit and receives a backlight illumination zone selection signal;

wherein, based on the backlight illumination zone selection signal received, the illuminant controller selectively drives the illuminants of the backlight module so as to form a local illumination zone in the backlight module corresponding to a local displaying area in which a target image is to be displayed on the global displaying area to have the target image displayed in the local displaying area.

2. The display device with a backlight local area illumination control circuit as claimed in claim 1, wherein the illuminant driving circuit comprises:

a first driving circuit, which comprises a plurality of first driving control lines each being connected to a terminal of each illuminant; and

a second driving circuit, which comprises a plurality of second driving control lines each being connected to an opposite terminal of each illuminant;

wherein the illuminant controller provides a first driving signal to the first driving circuit and also provides a second driving signal to the second driving circuit to drive the illuminants of the backlight module.

3. The display device as claimed in claim 1, wherein a diffusion board is arranged between the backlight module and the display panel.

4. The display device as claimed in claim 1, wherein the display panel is connected to a display panel driving circuit, which comprises a timing controller, a data driving circuit, and a gate driving circuit, the timing controller receiving an image data signal for controlling operation timings of the data driving circuit and the gate driving circuit to drive the display panel for displaying the target image.

5. A display device with a backlight local area illumination control circuit, the display device comprising a display panel and a backlight module and employing the backlight local area illumination control circuit to control an illumination zone of the backlight module, the backlight local area illumination control circuit comprising:

a plurality of illuminants, which are arranged along at least one side edge of the backlight module so that each illuminant generates and projects light toward the display panel to define a global illumination zone in the display panel corresponding to a global displaying area;

an illuminant driving circuit, which is connected to the illuminants of the backlight module; and

an illuminant controller, which is connected to the illuminant driving circuit and receives a backlight illumination zone selection signal;

wherein, based on the backlight illumination zone selection signal received, the illuminant controller selectively drives the illuminants of the backlight module so as to form a local illumination zone in the backlight module corresponding to a local displaying area in which a target image is to be displayed on the global displaying area to have the target image displayed in the local displaying area.

6. The display device as claimed in claim 5, wherein the illuminant driving circuit comprises:

a first driving circuit, which comprises a plurality of first driving control lines each being connected to a terminal of each illuminant; and

a second driving circuit, which comprises a plurality of second driving control lines each being connected to an opposite terminal of each illuminant;

wherein the illuminant controller provides a first driving signal to the first driving circuit and also provides a second driving signal to the second driving circuit to drive the illuminants of the backlight module.

7. The display device as claimed in claim 5, wherein a diffusion board is arranged between the backlight module and the display panel.

8. The display device as claimed in claim 5, wherein the display panel is connected to a display panel driving circuit, which comprises a timing controller, a data driving circuit, and a gate driving circuit, the timing controller receiving an image data signal for controlling operation timings of the data driving circuit and the gate driving circuit to drive the display panel for displaying the target image.