摘要:
A light control apparatus and a lighting appliance using the same enable increased luminous efficiency in light control and elongated operative life of a light source. The lighting appliance includes a light source and a light control apparatus. The light control apparatus comprises an electric current output circuit that outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, and a light control circuit that performs light control of the light source by intermittently supplying the constant electric current outputted from the electric current output circuit. The light control apparatus also comprises an electric discharge prevention circuit (diode) that prevents electric discharge of an electric charge charged in a capacitive component of the organic electroluminescence device.
摘要:
A light emitting device includes: a plurality of light emitting elements configured to emit light when a direct current is supplied thereto; and a direct current power supply circuit configured to supply an electric current of a given level or more to the light emitting elements. The light emitting device further includes: a light emitting element voltage detection circuit configured to detect a voltage applied to the light emitting elements; and a forward/reverse inverting circuit configured, when the light emitting element voltage detection circuit detects an abnormality in a light emitting element, to apply a reverse voltage to the light emitting element in which the abnormality is detected.
摘要:
Provision of a light emitting device having functionality for restoring to normal even if a low-voltage error occurs, by temporarily applying a reverse current to a low-voltage error light emitting element using a direction inverting circuit, and repairing portions in which impedance has fallen by applying the current.An illuminating device of a light emitting device using a lamp (light emitting element) is provided with a control power source circuit for generating a control voltage, a step-down chopper circuit for converting a direct-current voltage into power needed for the lamps comprising organic electroluminescent elements as light emitting elements, a lamp current detecting circuit for detecting a current flowing to the lamps, a direction inverting circuit including a plurality of lamps and capable of inverting the direction of the connection of the plurality of lamps, a control circuit for generating a control signal for supplying desired power to the lamps, and the lamp current command circuit for controlling the current flowing to the lamps.
摘要:
It is an object to provide a light control apparatus and a lighting appliance using the same which enable to increase luminous efficiency in the light control. The lighting appliance includes a light source and a light control apparatus. The light control apparatus includes an electric current output circuit which outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, an electric current control circuit which controls an intensity of a driving electric current outputted from the electric current output circuit, and the electric current control circuit biases a direct current component so as to vary the driving electric current periodically between a predetermined maximum value and a predetermined minimum value and flows in the same direction at all times in the light control of the light source.
摘要:
It is an object to provide a light control apparatus and a lighting appliance using the same which enables to increase luminous efficiency in the light control. The lighting appliance includes a light source and a light control apparatus. The light control apparatus includes an electric current output circuit which outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, an electric current control circuit which controls an intensity of a driving electric current outputted from the electric current output circuit, and the electric current control circuit biases a direct current component so as to vary the driving electric current periodically between a predetermined maximum value and a predetermined minimum value and flows in the same direction at all times in the light control of the light source.
摘要:
It is objected to provide a light control apparatus and a lighting appliance using the same which enable to increase luminous efficiency in the light control and to elongate operative life of a light source. The lighting appliance comprises a light source 1 and a light control apparatus 2. The light control apparatus 2 comprises an electric current output circuit 5 which outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, a light control circuit 6 which performs light control of the light source 1 by intermittently supplying the constant electric current outputted from the electric current output circuit, and an electric discharge prevention circuit (diode) 70 which prevents electric discharge of an electric charge charged in capacitive component of the organic electroluminescence device.
摘要:
A light emitting device includes: a plurality of light emitting elements configured to emit light when a direct current is supplied thereto; and a direct current power supply circuit configured to supply an electric current of a given level or more to the light emitting elements. The light emitting device further includes: a light emitting element voltage detection circuit configured to detect a voltage applied to the light emitting elements; and a forward/reverse inverting circuit configured, when the light emitting element voltage detection circuit detects an abnormality in a light emitting element, to apply a reverse voltage to the light emitting element in which the abnormality is detected.
摘要:
Provision of a light emitting device having functionality for restoring to normal even if a low-voltage error occurs, by temporarily applying a reverse current to a low-voltage error light emitting element using a direction inverting circuit, and repairing portions in which impedance has fallen by applying the current.An illuminating device of a light emitting device using a lamp (light emitting element) is provided with a control power source circuit for generating a control voltage, a step-down chopper circuit for converting a direct-current voltage into power needed for the lamps comprising organic electroluminescent elements as light emitting elements, a lamp current detecting circuit for detecting a current flowing to the lamps, a direction inverting circuit including a plurality of lamps and capable of inverting the direction of the connection of the plurality of lamps, a control circuit for generating a control signal for supplying desired power to the lamps, and the lamp current command circuit for controlling the current flowing to the lamps.
摘要:
A planar light-emitting module lighting circuit uses a lamp comprising an organic electroluminescence layer and electrodes sandwiching the organic electroluminescence layer as a load, and applies a current to the load so as to cause the organic electroluminescence layer to emit light. In the planer light-emitting module lighting circuit, a current at a lighting start time of the lamp is made small as compared with a current at a stationary lighting time at which a predetermined time period has passed since a lighting start.
摘要:
A planar light-emitting module lighting circuit uses a lamp comprising an organic electroluminescence layer and electrodes sandwiching the organic electroluminescence layer as a load, and applies a current to the load so as to cause the organic electroluminescence layer to emit light. In the planer light-emitting module lighting circuit, a current at a lighting start time of the lamp is made small as compared with a current at a stationary lighting time at which a predetermined time period has passed since a lighting start.