JPS6162468U - - Google Patents

Description

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1 and 2 relate to a first embodiment of the present invention, FIG. 1 is a circuit diagram showing a horizontal deflection circuit portion in an image display device of the first embodiment, and FIG. 1 is a timing chart for explaining the operation showing the waveforms of each part in FIG.
FIG. 4 is a circuit diagram showing a means for forming a clock pulse applied to a flip-flop in the third embodiment of the present invention, and FIG. 5 is a peripheral portion of the resonant capacitance switching circuit of the horizontal output circuit in the ninth embodiment of the present invention. FIG. DESCRIPTION OF SYMBOLS 1...Horizontal deflection circuit, 2...Horizontal oscillation circuit, 3...Time constant circuit, 4...Horizontal output circuit, 5...Voltage control circuit, FF...D flip-flop, SH, SL...Analog switch, Qs, QWH, PWL...Transistor , Cr ₁ , Cr ₂ ... capacitor, Ly ... deflection coil.

Claims (1)

[Claims for Utility Model Registration] (1) An image display device capable of receiving signals with two or more different horizontal deflection frequencies, and for switching the image reception mode according to the type of horizontal deflection frequency. an operating means; a switching signal generating means for generating a switching signal corresponding to the mode switched by the operating means at a timing that coincides with the horizontal scanning period; and receiving a switching signal from the switching signal generating means; An image display device comprising switching circuit means for switching at least an oscillation frequency of a horizontal oscillation circuit, a power supply voltage of a horizontal output circuit, and a resonant capacitance of the horizontal output circuit. (2) The means for switching the horizontal oscillation frequency in the switching circuit means is configured to switch the horizontal oscillation frequency to the horizontal oscillation circuit through the first and second semiconductor switch elements, respectively.
, a second frequency-determining number element is connected, one of the semiconductor switch elements is turned on in response to a switching signal from the switching signal generating means, and a constant element connected to the switching element generates horizontal oscillation. The image display device according to claim 1, characterized in that the frequency is determined. (3) The means for switching the power supply voltage of the horizontal output circuit in the switching circuit means includes a control transistor whose collector-emitter path is connected between the voltage source and the horizontal output circuit, and a voltage appearing at the output terminal of the control transistor. an error amplification transistor whose emitter is supplied with a reference voltage and whose collector is connected to the base of the control transistor; and a voltage division ratio that is fed back to the base of the error amplification transistor in response to the switching signal. 2. The image display device according to claim 1, characterized in that the image display device comprises a semiconductor element that can be switched by switching the image display device. (4) The means for switching the resonant capacitance of the horizontal output circuit in the switching circuit means includes a first capacitor connected in parallel with the horizontal output transistor and a second capacitor connected in parallel with the first capacitor. The image display according to claim 1 of the utility model registration claim, characterized in that the image display has a series circuit of a semiconductor switching element and a semiconductor switching element, and the semiconductor switching element is turned on and off in response to the switching signal. Device.