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白平衡的定义是:接收机屏幕不同亮度的各部份不出现附加颜色,并达到符合规定的标准白色光源程度。这也是白平衡调节的要求。彩色机采用大面积着色,黑白图象保证图象细节。只有建立准确的白平衡才能保证重现彩色逼真和图象清晰鲜明。由于彩色荧光粉发光效率各不相同,各电子枪的调制特性也不完全一致,要调整良好的黑白图象就必须细心调节红绿蓝三电子束的流量和电子枪的截止电压,即合理选择三电子枪的静态工作点。如图1无信号输入时,直流输出都等于红枪的截止电压U_(gr);当三路同时输入同样的阶
The definition of white balance is: the receiver screen does not appear in different parts of the brightness of the additional color, and meet the required standard white light level. This is also the requirement for white balance adjustment. Color machine adopts large area coloring, black and white image to ensure the image detail. Only the establishment of an accurate white balance can guarantee the reproduction of vivid colors and vivid images. Due to the different luminescent efficiency of the color phosphor, the modulation characteristics of each electron gun are not exactly the same. To adjust a good black-and-white image, the flow of the red, green and blue electron beams and the cut-off voltage of the electron gun must be carefully adjusted, Static working point. As shown in Figure 1, no signal input, the DC output is equal to the red gun cut-off voltage U_ (gr); when the same three-way input to the same order