Abstract: A long-range VGA image transmission system includes an image output source for providing a first image signal; a test circuit for providing a test signal; an image encoding and transmitting circuit for encoding the first image signal and test signal to generate a transmission signal; an image decoding and receiving circuit for receiving and decoding the transmission signal to generate a second image signal and the test signal; an image detection and comparison circuit for receiving, detecting and comparing the second image signal with the test signal to generate an adjustment signal; an image-enhancement compensation circuit for receiving the adjustment signal to automatically adjust the second image signal and generate a third image signal; and an image display device for receiving the second image signal and then receiving the third image signal after the image adjustment. Therefore, manpower cost and possible failure of image adjustment with naked eye is eliminated.

Abstract: A long-range VGA image transmission system includes an image output source for providing a first image signal; a test circuit for providing a test signal; an image encoding and transmitting circuit for encoding the first image signal and test signal to generate a transmission signal; an image decoding and receiving circuit for receiving and decoding the transmission signal to generate a second image signal and the test signal; an image detection and comparison circuit for receiving, detecting and comparing the second image signal with the test signal to generate an adjustment signal; an image-enhancement compensation circuit for receiving the adjustment signal to automatically adjust the second image signal and generate a third image signal; and an image display device for receiving the second image signal and then receiving the third image signal after the image adjustment. Therefore, manpower cost and possible failure of image adjustment with naked eye is eliminated.

Abstract: Disclosed is a cradle for radiotelephone having a hanging hole for the cradle to be conveniently hooked in a car for a radiotelephone to stably position on the running car. The cradle includes a main body to which two side arms are laterally movably attached. The two side arms can be brought to move away from each other by depressing a control button on the main body, and can be pressed toward each other with only one hand to have a desired width between them without automatically becoming away from one another again, so that the cradle can be used to accommodate radiotelephone of any size or type. A forward projected base at the bottom of the main body bears the weight of the radiotelephone to avoid the same from slipping off the cradle due to any vibration or gravity.