Discharge lamp lighting device
First Claim
1. A discharge lamp lighting device comprising:
- a lamp socket including a pair of main electrodes for connecting a discharge lamp;
a stabilizing circuit connected to a power source and outputting a voltage to said lamp socket;
a starting circuit connected between said stabilizing circuit and said lamp socket, activated before said discharge lamp begins discharging to generate a high voltage required to start discharging, and deactivated after discharging begins;
means for deactivating said starting circuit when said discharge lamp is not installed in response to installation or non-installation of said discharge lamp to said lamp socket; and
said deactivating means including an auxiliary electrode to deactivate said starting circuit when said discharge lamp is not installed by interrupting a connection between said auxiliary electrode and one of said pair of main electrodes, and activating said starting circuit when said discharge lamp is installed by connecting conductively said auxiliary electrode and said one of said pair of main electrodes.
3 Assignments
0 Petitions
Accused Products
Abstract
A discharge lamp lighting device comprising a lamp socket for connecting the discharge lamp; a stabilizing circuit connected to the power source and outputting a voltage to the lamp socket; a starting circuit connected between the stabilizing circuit and the lamp socket, and activated before the discharge lamp begins discharging to generate a high voltage required to start discharging, and deactivated after discharging begins; and a means for disabling the starting circuit when the discharge lamp is not installed in response to the installation or non-installation of the discharge lamp to the lamp socket.
Preferably, the starting circuit is integrated with the lamp socket, thus forming a lamp socket unit comprising a starting circuit.
56 Citations
29 Claims
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1. A discharge lamp lighting device comprising:
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a lamp socket including a pair of main electrodes for connecting a discharge lamp; a stabilizing circuit connected to a power source and outputting a voltage to said lamp socket; a starting circuit connected between said stabilizing circuit and said lamp socket, activated before said discharge lamp begins discharging to generate a high voltage required to start discharging, and deactivated after discharging begins; means for deactivating said starting circuit when said discharge lamp is not installed in response to installation or non-installation of said discharge lamp to said lamp socket; and said deactivating means including an auxiliary electrode to deactivate said starting circuit when said discharge lamp is not installed by interrupting a connection between said auxiliary electrode and one of said pair of main electrodes, and activating said starting circuit when said discharge lamp is installed by connecting conductively said auxiliary electrode and said one of said pair of main electrodes. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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2. A discharge lamp lighting device comprising:
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a lamp socket including a pair of main electrodes for connecting a discharge lamp; a stabilizing circuit connected to a power source and outputting a first voltage and a second voltage that is lower than said first voltage; a starting circuit that is connected between said stabilizing circuit and said lamp socket, being activated when said first voltage is input from said stabilizing circuit to discharge said discharge lamp by generating a high voltage required to start said discharge lamp discharging, and being deactivated when said second voltage is input thereto after discharging begins, connecting said stabilizing circuit directly to said lamp socket to stably discharge said discharge lamp; means for deactivating said starting circuit in response to installation or non-installation of said discharge lamp to said lamp socket; and said deactivating means including an auxiliary electrode to deactive said starting circuit when said discharge lamp is not installed by interrupting a connection between said auxilialy electrode and one of said pair of main electrodes, and activating said starting circuit when said discharge lamp is installed by connecting conductively said auxiliary electrode and said one of said pair of main electrodes.
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16. A discharge lamp lighting unit comprising
a lamp socket member for connecting a discharge lamp; -
a case comprising a high voltage transformer housing and a main igniter circuit housing; a high voltage transformer housed in said high voltage transformer housing and forming part of a main igniter circuit embedded in a filler; and said main igniter circuit housed in said main igniter circuit housing and embedded in the filler. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification