JPH0185893U

JPH0185893U -

Info

Publication number: JPH0185893U
Application number: JP18249387U
Authority: JP
Priority date: 1987-11-30
Filing date: 1987-11-30
Publication date: 1989-06-07

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示すモノクロデ
イスプレイ装置の構成図、第２図は従来のモノク
ロデイスプレイ装置の構成図である。図中、１５は可変抵抗器である。なお、図中同
一符号は同一または相当部分を示す。 FIG. 1 is a block diagram of a monochrome display device showing an embodiment of this invention, and FIG. 2 is a block diagram of a conventional monochrome display device. In the figure, 15 is a variable resistor. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A power supply that rectifies AC100V current and supplies voltage to the horizontal deflection driver, vertical deflection driver, amplifier power supply, video amplifier, focus voltage setting device, black level voltage setting device, and screen voltage setting device, and the power supply supplied by this power supply. A horizontal deflection driver generates a deflection voltage waveform in the horizontal direction using a voltage and supplies its output to the deflection coil, and a vertical driver generates a deflection voltage waveform in the vertical direction using a voltage also supplied by the power supply and supplies its output to the deflection coil. a deflection driver, and a deflection coil for deflecting electrons emitted from the electronic system in the CRT tube to form a screen by being supplied with output voltage waveforms from the horizontal and vertical deflection drivers;
A video amplifier that amplifies the video signal using the voltage supplied from the power supply and supplies it to the CRT tube, a focus voltage setting device that sets the focus voltage from the voltage supplied from the power supply, and a display based on the voltage supplied from the power supply. A black level voltage setting device that determines the black level voltage of the color and supplies it to the CRT tube, a screen voltage setting device that sets the screen voltage supplied to the CRT tube from the voltage supplied from the power supply, and a voltage supplied from the power supply. an amplification power supply that amplifies the voltage and supplies voltage to the amplifier, an integrator that integrates the vertical deflection voltage waveform output from the vertical deflection driver to create a parabolic waveform, and a horizontal An adder for superimposing the horizontal deflection voltage waveform output from the deflection driver, an amplifier for amplifying the superimposed waveform by the adder using a voltage supplied from the amplifier power supply, and a variable resistor for adjusting the size of the combined waveform; an adder for adding the focus voltage output from the focus voltage setting device and the combined waveform output from the variable resistor; The video signal output from the video amplifier, the black level voltage output from the black level voltage setter, the screen voltage output from the screen voltage setter, and the focus voltage output from the adder are added, and the electrons are deflected by the deflection coil. In a monochrome display device equipped with a CRT tube in which a screen is formed by the above-mentioned variable resistor, the magnitude of a voltage waveform in which a horizontal deflection voltage waveform and a vertical parabolic voltage waveform are superimposed is changed, and in addition to the focus voltage, By matching, the top and bottom of the screen,
A monochrome display device characterized by being able to perform optimal correction by freely changing a dynamic focus voltage for correcting focus blur at left and right ends.