| 摘要 |
An improved touchscreen display device is provided. When displaying an image deriving from an image source (e.g., a DVD) and an operation button image in superposition, the image of the image source should not be obstructed by the operation button image. To this end, the image of the image source may be reduced in size, and the reduced image is combined with the operation button image. The image of the image source may be reduced in a horizontal and/or vertical direction by a screen compression technique. Alternatively, the image of the image source may be reduced by changing a display mode (e.g., from a wide mode to a normal mode).
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