JPS62141789U

JPS62141789U -

Info

Publication number: JPS62141789U
Application number: JP2935186U
Authority: JP
Priority date: 1986-02-28
Filing date: 1986-02-28
Publication date: 1987-09-07

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係るライト付時計
のブロツク図。第２図は、第１図の電流検出回路
の詳細な回路図。第３図は、第１図の電圧検出回
路の詳細な回路図。第４図は、第１図のランプ断
線検出回路の詳細な回路図。第５図は、第１図の
アラーム回路の詳細な回路図。第６図は、第１図
の表示制御回路および時刻表示回路の詳細な回路
図。第７図は、第１図の表示制御回路および時刻
表示回路の他の詳細な回路図。２……ランプ、６……スイツチ、８……電流検
出回路、１０……電圧検出回路、１２……ランプ
断線検出回路、１４……表示制御回路、１６……
時刻表示部。 FIG. 1 is a block diagram of a clock with a light according to an embodiment of the present invention. FIG. 2 is a detailed circuit diagram of the current detection circuit of FIG. 1. FIG. 3 is a detailed circuit diagram of the voltage detection circuit of FIG. 1. FIG. 4 is a detailed circuit diagram of the lamp burnout detection circuit of FIG. 1. FIG. 5 is a detailed circuit diagram of the alarm circuit of FIG. 1. FIG. 6 is a detailed circuit diagram of the display control circuit and time display circuit of FIG. 1. FIG. 7 is another detailed circuit diagram of the display control circuit and time display circuit of FIG. 1. 2... Lamp, 6... Switch, 8... Current detection circuit, 10... Voltage detection circuit, 12... Lamp breakage detection circuit, 14... Display control circuit, 16...
Time display section.

Claims

[Scope of utility model registration request]

A clock with a light that includes a lamp that is powered by an AC power source, a switch that controls turning on and off of the lamp, a time display section that displays the time, and a clock circuit that drives the time display section, a current detection circuit connected in series with the lamp to detect whether a current is flowing through the lamp; and a voltage detection circuit connected in parallel to the switch to detect whether a voltage is applied to the lamp. a lamp breakage detection circuit that detects whether the lamp is burnt out based on signals from the voltage detection circuit and the current detection circuit; and a lamp breakage detection circuit that controls display contents of the time display section based on signals from the lamp breakage detection circuit. A clock with a light, which is characterized by the addition of a display control circuit.