JPS63115121U

JPS63115121U -

Info

Publication number: JPS63115121U
Application number: JP16257986U
Authority: JP
Priority date: 1986-10-23
Filing date: 1986-10-23
Publication date: 1988-07-25

Description

[Brief explanation of the drawing]

第１図は、車載用音響機器の前面表示部を示す
斜視図、第２図は、液晶板の正面図、第３図は、
同断面概略図、第４図は、本考案に係る駆動回路
の概略図、第５図は、各パルス信号の位相関係を
示す図である。１……音響機器の前面表示部、２……液晶板、
５……発振回路、６……位相反転回路、７……光
検出回路、８……ゲート回路、ＰＵ……パルス信
号、……逆相パルス信号、Ａ……共通端子、
Ｂ……セグメント端子、Ｃ……制御端子。 Fig. 1 is a perspective view showing the front display section of the in-vehicle audio equipment, Fig. 2 is a front view of the liquid crystal panel, and Fig. 3 is the
FIG. 4 is a schematic diagram of the drive circuit according to the present invention, and FIG. 5 is a diagram showing the phase relationship of each pulse signal. 1...Front display section of audio equipment, 2...Liquid crystal panel,
5...Oscillation circuit, 6...Phase inversion circuit, 7...Photodetection circuit, 8...Gate circuit, PU...Pulse signal,...Negative phase pulse signal, A...Common terminal,
B...Segment terminal, C...Control terminal.

Claims

[Scope of utility model registration request]

A drive circuit that outputs a pulse signal in a drive circuit that includes a common terminal to which a pulse signal is applied and a segment terminal to which a reverse phase pulse signal obtained by inverting the pulse signal is applied, and displays a liquid crystal panel using both of the pulse signals. a phase inversion circuit that inverts the phase of the pulse signal and outputs it to a segment terminal; a photodetection circuit that compares external light with a set level and outputs an output signal according to the magnitude thereof; and the photodetection circuit. A liquid crystal panel comprising a gate circuit which selects either the pulse signal or the reverse phase pulse signal based on the output signal of the circuit and applies it to a control terminal of the liquid crystal panel to invert bright and dark display modes of the liquid crystal panel. drive circuit.