Unified 0-10V and DALI dimming interface circuit
First Claim
1. A method of providing dual 0-10V analog and DALI control of a ballast circuit for dimming a lighting device, comprising:
- powering ON the ballast circuit;
reading control state information stored in memory and describing a control state of the ballast circuit prior to entering an OFF state;
determining whether the ballast circuit was in a DALI control state prior to entering the OFF state;
employing received DALI commands to control the ballast circuit if the ballast circuit was in a DALI control state prior to entering the OFF state; and
employing received analog control commands to control the ballast circuit if the ballast circuit was in an analog control state prior to entering the OFF state.
11 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods are disclosed that facilitate switching a lamp ballast between DALI and analog control states as a function of control state information stored prior to the ballast being powered of and control information received by an interface circuit for the ballast circuit. A depolarization circuit is coupled to the interface circuit and ensures consistent polarity across a rectifier circuit regardless of the polarity of two control wires coupled to a miswiring protection circuit in the interface circuit. In this manner, a single interface circuit provides dual 0-10V analog and DALI control for dimming a lighting device regardless of whether a wall-mounted controller coupled to the interface circuit is an analog or a DALI type controller, thereby mitigating a need to switch out a ballast circuit coupled to the lighting device when changing between DALI and analog type controllers.
19 Citations
12 Claims
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1. A method of providing dual 0-10V analog and DALI control of a ballast circuit for dimming a lighting device, comprising:
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powering ON the ballast circuit; reading control state information stored in memory and describing a control state of the ballast circuit prior to entering an OFF state; determining whether the ballast circuit was in a DALI control state prior to entering the OFF state; employing received DALI commands to control the ballast circuit if the ballast circuit was in a DALI control state prior to entering the OFF state; and employing received analog control commands to control the ballast circuit if the ballast circuit was in an analog control state prior to entering the OFF state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of providing dual 0-10V analog and DALI control of a ballast circuit for dimming a lighting device, comprising:
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reading, upon powering ON a lighting device ballast circuit, control state information stored in memory and describing a control state of the ballast circuit prior to entering an OFF state; determining whether the ballast circuit was in a DALI control state prior to entering the OFF state; employing received DALI commands to control the ballast circuit if the ballast circuit was in a DALI control state prior to entering the OFF state; employing received analog control commands to control the ballast circuit if the ballast circuit was in an analog control state prior to entering the OFF state; monitoring incoming control signals for DALI control commands when the ballast is in the analog control state; updating the control state information in the memory to indicate that the ballast circuit is in the DALI control state upon detection of the valid DALI control command; monitoring incoming control signals for analog control commands when the ballast is in the DALI control state; and updating the control state information in the memory to indicate that the ballast circuit is in the analog control state upon detection of the analog control command. - View Dependent Claims (12)
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Specification