CRT SCREEN CONTROL DEVICE

PURPOSE: To improve the control accuracy of a CRT screen by previously forming a divided section setting picture on the CRT screen, irradiating the section setting picture with a point checking beam to change the section setting picture to an enlarged picture by the irradiation of the beam and outputting a control signal by a screen operating beam radiated from a remote device. CONSTITUTION: The remote device 31 irradiates a screen operating point 3 on a section controlling picture 7 with a point checking beam 34. A picture display device changes the picture 7 to an enlarged picture 8 by the irradiation of the beam 34. A central processing unit(CPU) 4 outputs a control signal by a screen operating beam 44 radiated from the device 31. Sections are previously formed on a picture displayed on the device 33, and when a certain section is irradiated with the beam 34, the section is expanded to the whole screen. The enlarged area is irradiated with the picture operating beam 44 to execute operation on the screen.