| 摘要 |
PURPOSE:To easily realize the adjustment of a white uniformity by an electric circuit by providing a picture division means and a contrast adjusting means for adjusting the size of the signal corresponding to the part optionally selected on the divided parts of the picture every primary color signal. CONSTITUTION:For instance, an operator for the adjustment observes the display 8 receiving a white signal and selects the optional part of the picture divided in a control signal generating circuit 1 in a data input circuit 2, Now, when the light of the red fluorescent member is weak in a certain part, the signal is inputted in the data input circuit 2 so as to enlarge a red contrast in a memory circuit 3 for storing a red signal, namely, while adjusting the quantity of data so as to increase the quantity of the beam of a red electron gun. This adjustment is executed on the optional part of the picture on the respective signals of red, green and blue and then, the adjustment of the white uniformity can be carried out. Thus, the device is constituted of the electric circuit, so that the highly accurate adjustment can be easily performed.
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