Display control apparatus and method and image processing method
A display control apparatus is capable of reducing image scaling times, maintaining image quality, and extending a turn-on time of a pair of 3D glasses. The display control apparatus includes a data processing unit and a timing generating unit. The data processing unit provides an image frame comprising a valid data region, which is larger than a visual region of a display panel. The timing generating unit generates an output timing signal according to a relative position of the visual region corresponding to the valid data region, so that a partial region of the valid data region corresponds to the visual region of the display panel. The partial region of the valid data region is displayed in the visual region of the display panel according to the output timing signal.
1. A display method, for displaying a frame on a display panel, comprising:
providing the frame comprising a valid data region that is larger than a visual region of the display panel, wherein a partial region of the valid data region corresponds to the entire visual region, and the partial region has a same number of scan lines as the visual region;
generating an output timing signal according to a relative position of the visual region corresponding to the valid data region, such that said output timing signal corresponds to quantity of scan lines that only link to the partial region of the valid data region;
outputting the frame and the output timing signal to the display panel so as to display the partial region of the valid data region in the visual region of the display panel according to the output timing signal; and
providing a glasses control signal, so that a pair of 3D glasses is turned on during a scan interval corresponding to a remaining region of the valid data region excluding the partial region.
2. The method as claimed in claim 1 , further comprising:
providing selection information to determine the relative position of the visual region corresponding to the valid data region.
3. The method as claimed in claim 2 , wherein the selection information is inputted by a user.
4. The method as claimed in claim 2 , wherein the frame and the selection information are provided by an image source, and the display method further comprises:
generating the frame and the selection information according to a source frame and an output resolution, wherein the source frame comprises a source valid data region corresponding to the partial region, and a resolution of the valid data region of the frame is equal to the output resolution, and is larger than a resolution of the source valid data region; and
outputting by the image source the frame and the selection information.
5. The method as claimed in claim 4 , wherein when a resolution of the visual region of the display panel is equal to the resolution of the source valid data region, the image source regards the source valid data region as the partial region when the frame is generated.
6. The method as claimed in claim 4 , wherein when the resolution of the visual region of the display panel is not equal to the resolution of the source valid data region, the image source performs image scaling on the source valid data region to generate the partial region when the frame is generated, so that a resolution of the partial region is equal to the resolution of the visual region.
7. The method as claimed in claim 4 , wherein when the resolution of visual region of the display panel is not equal to the resolution of the source valid data region, the image source regards the source valid data region as the partial region when the frame is generated, and the method further comprises:
performing image scaling on the partial region, so that the resolution of the partial region is converted to the resolution of the visual region.
8. The method as claimed in claim 1 , wherein the output timing signal comprises a horizontal data enable (HDE) signal, and the number of scan lines corresponding to the HDE signal is determined according to the number of scan lines in the partial region.
9. The method as claimed in claim 1 , wherein the output timing signal comprises a vertical reference signal and a vertical data enable (VDE) signal, the VDE signal corresponds to the valid data region, and relative timing between the vertical reference signal and the VDE signal is determined according to the relative position of the visual region corresponding to the valid data region.
10. The method as claimed in claim 1 , wherein the output timing signal comprises a vertical reference signal and an HDE signal, the HDE signal corresponds to the number of scan lines in the valid data region, and the relative timing between the vertical reference signal and the HDE signal is determined according to the relative position of the visual region corresponding to the valid data region.
11. A display control apparatus, for controlling a display panel for displaying a frame, comprising:
a data processing unit, for providing the frame comprising a valid data region that is larger than a visual region of the display panel, wherein a partial region of the valid data region corresponds to the entire visual region, and the partial region has a same number of scan lines as the visual region; and
a timing generating unit, for generating an output timing signal according to a relative position of the visual region corresponding to the valid data region, such that said output timing signal corresponds to quantity of scan lines that only link to the partial region of the valid data region;
wherein the partial region of the valid data region is displayed in the visual region of the display panel according to the output timing signal; and
wherein when the display panel supports 3D display, the timing generating unit further generates a glasses control signal, so that a pair of 3D glasses is turned on during a scan interval corresponding to a remaining region of the valid data region excluding the partial.
12. The display control apparatus as claimed in claim 11 , further comprising:
a determining unit, for determining the relative position of the visual region corresponding to the valid data region according to selection information.
13. The display control apparatus as claimed in claim 12 , wherein an image source generates the frame and the selection information according to a source frame and an output resolution, and outputs the frame to the data processing unit according to the output resolution, the source frame comprises a source valid data region corresponding to the partial region, and a resolution of the valid data region of the frame is equal to the output resolution and is larger than a resolution of the source valid data region.
14. The display control apparatus as claimed in claim 13 , wherein when a resolution of the visual region is equal to the resolution of the source valid data region, the image source regards the source valid data region as the partial region when the frame is generated.
15. The display control apparatus as claimed in claim 11 , wherein the output timing signal comprises an HDE signal, and the number of scan lines corresponding to HDE signal is determined according to the number of scan lines in the partial region.
16. The display control apparatus as claimed in claim 11 , wherein the output timing signal comprises a vertical reference signal and a VDE signal, the VDE signal corresponds to the valid data region, and relative timing between the vertical reference signal and the VDE signal is determined according to the relative position of the visual region corresponding to the valid data region.