Title:
【発明の名称】ランプの光量調節装置
Document Type and Number:
Japanese Patent JPH0685357
Kind Code:
B2
Abstract:
PURPOSE:To achieve the cost reduction by constructing the power source short circuit in such a manner that, at the time when the capacitor is electrically discharged, the circuit is made 'ON' and, at the time when the capacitor is electrically charged, the circuit is made 'OFF', and that, during a time period between 'ON' and 'OFF', the circuit makes its continuous control of the electric current. CONSTITUTION:A pulse oscillator 2 is so arranged that it is supplied with an electric current from a d.c. power source 3 via a voltage-adjusting resistor RO, and that it is connected, in parallel, with a power source short circuit controllable through electrical charge or electrical discharge of a capacitor c1. When the capacitor c1 is in an electrically discharged condition, the power source short circuit 6 is turned 'ON' to shortcircuiting the power source, whereas, when the capacitor c1 is in an electrically charged condition, the short circuit 6 is turned 'OFF'. During a time period between the 'ON' and the 'OFF' operation, continuous control of the current is made in the short circuit 6. This enables obtaining a great time constant even with a small capacity and also enables reducing the cost.
Inventors:
TANAKA MASAO
HONAGA SHUZO
HONAGA SHUZO
Application Number:
JP28365990A
Publication Date:
October 26, 1994
Filing Date:
October 22, 1990
Export Citation:
Assignee:
METRO DENSO KK
International Classes:
B60Q3/04; H05B39/02; H05B39/04; (IPC1-7): H05B39/04; B60Q3/04; H05B39/02
Domestic Patent References:
| JP636782A | ||||
| JP6059697A | ||||
| JP62256399A | ||||
| JP6173447U | ||||
| JP59170996U | ||||
| JP5818755B2 | ||||
| JP3916625Y1 |
Attorney, Agent or Firm:
Koji Mikami
Next Patent: 連続焼鈍炉におけるストリップ拘束装置