Solid state lighting panels with variable voltage boost current sources
First Claim
1. A lighting panel system, comprising:
- a lighting panel including a string of solid state lighting devices; and
a current supply circuit having a voltage input terminal, a control input terminal, and first and second output terminals coupled to the string of solid state lighting devices, wherein the current supply circuit is configured to supply an on-state drive current to the string of solid state lighting devices in response to a control signal;
wherein the current supply circuit comprises a charging inductor coupled to the voltage input terminal and an output capacitor coupled to the first output terminal; and
wherein the current supply circuit is configured to operate in continuous conduction mode in which current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices.
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Accused Products
Abstract
A lighting panel system includes a lighting panel having a string of solid state lighting devices and a current supply circuit having a voltage input terminal, a control input terminal, and first and second output terminals coupled to the string of solid state lighting devices. The current supply circuit is configured to supply an on-state drive current to the string of solid state lighting devices in response to a control signal. The current supply circuit includes a charging inductor coupled to the voltage input terminal and an output capacitor coupled to the first output terminal. The current supply circuit is configured to operate in continuous conduction mode in which current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices.
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Citations
22 Claims
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1. A lighting panel system, comprising:
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a lighting panel including a string of solid state lighting devices; and
a current supply circuit having a voltage input terminal, a control input terminal, and first and second output terminals coupled to the string of solid state lighting devices, wherein the current supply circuit is configured to supply an on-state drive current to the string of solid state lighting devices in response to a control signal;
wherein the current supply circuit comprises a charging inductor coupled to the voltage input terminal and an output capacitor coupled to the first output terminal; and
wherein the current supply circuit is configured to operate in continuous conduction mode in which current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of generating an on-state drive current for driving a string of solid state light emitting devices in a lighting panel system, comprising:
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energizing a charging inductor with an input voltage;
discharging energy stored in the charging inductor into an output capacitor; and
applying a voltage on the output capacitor to the string of solid state lighting devices;
wherein current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A lighting panel system, comprising:
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a lighting panel including a first string of solid state lighting devices configured to emit red light, a second string of solid state lighting devices configured to emit green light, and a third string of solid state lighting devices configured to emit blue light; and
at least three current supply circuits coupled to the first, second and third strings, respectively, wherein each of the current supply circuits comprises a variable voltage boost, constant current power supply circuit configured to operate in continuous current mode. - View Dependent Claims (21, 22)
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Specification