Controller and driving method for supplying energy to display device circuitry
First Claim
1. A controller for controlling at least two cold cathode fluorescent lamp (CCFL) power circuits, comprisinga phase-shift selector for generating a reference signal, the reference signal being programmed to indicate an amount of phase-delay according to a number of CCFL power circuits connected;
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Accused Products
Abstract
A controller for controlling at least two power circuits comprises a phase-shift selector for generating a reference signal according to variable input signals, the reference signal is programmed to indicate an amount of phase-delay according to a number of CCFL power circuits connected; and a pulse generator for receiving the reference signal and generating a pulse signal CLK in response to the received reference signal, the pulse signal is coupled to the CCFL power circuits connected for initiating the operation of the CCFL power circuits. The controller is used to control energy supplying to an electrical circuit comprising multiple CCFL power circuits and is more particularly to provide phase delay to the electrical circuit. Usually, the electrical circuit is applied to display devices, such as liquid crystal display monitors, liquid crystal display computers and liquid crystal display televisions.
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Citations
23 Claims
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1. A controller for controlling at least two cold cathode fluorescent lamp (CCFL) power circuits, comprising
a phase-shift selector for generating a reference signal, the reference signal being programmed to indicate an amount of phase-delay according to a number of CCFL power circuits connected; - and
a pulse generator for receiving the reference signal and generating a pulse signal in response to the received reference signal, the pulse signal being coupled to the at least two CCFL power circuits for initiating the operation of the at least two CCFL power circuits. - View Dependent Claims (2, 3)
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4. An electrical circuit for supplying energy to CCFL loads, comprising at least two CCFL power circuits, each of the at least two CCFL power circuits comprising a phase-delay selector for programming a phase-delay of the CCFL power circuit, wherein the amount of the phase-delay for each CCFL power circuit is stepwise increased according to operation sequence of the CCFL power circuits;
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a controller having a phase-shift selector for generating a reference signal according to a number of the CCFL power circuits connected and a pulse generator for receiving the reference signal and generating a pulse signal in response to the received reference signal, the pulse signal being coupled to the at least two CCFL power circuits for initiating the operation of the at least two CCFL power circuits; wherein a first CCFL power circuit of the at least two CCFL power circuits is initiated immediately after the pulse signal is received and a second CCFL power circuit of the at least two CCFL power circuits is initiated after a predetermined amount of phase-delay. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A display device having CCFL loads, comprising
at least two CCFL power circuits, each of the at least two CCFL power circuits comprising a phase-delay selector for programming a phase-delay of the CCFL power circuit, wherein the amount of the phase-delay for each CCFL power circuit is stepwise increased according to operation sequence of the CCFL power circuits; -
a controller having a phase-shift selector for generating a reference signal according to a number of the CCFL power circuits connected and a pulse generator for receiving the reference signal and generating a pulse signal in response the received reference signal, the pulse signal being coupled to the at least two CCFL power circuits for initiating the operation of the at least two CCFL power circuits; at least two transformers, each coupled to the at least two CCFL power circuits, respectively; at least two CCFL loads, each coupled to the at least two transformers, respectively; and wherein a first CCFL power circuit of the at least two CCFL power circuits is initiated immediately after the pulse signal is received so as to turn on a first CCFL load of the at least two CCFL loads and a second CCFL power circuit of the at least two CCFL power circuits is initiated after a predetermined amount of phase-delay so as to turn on a second CCFL load of the at least two CCFL loads. - View Dependent Claims (12, 13, 14, 15)
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16. A method for driving at least two CCFL power circuits, comprising the steps of
(a) generating a reference signal from the phase-shift selector; -
(b) coupling the reference signal to a pulse generator; (c) generating a pulse signal from the pulse generator in response to the reference signal and coupling the pulse signal to each of the at least two CCFL power circuits; (d) initiating the operation of a first CCFL power circuit after receiving the pulse signal; and (e) initiating the operation of a second CCFL power circuit after a predetermined amount of phase-delay. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification