Control and/or regulating means, circuit assembly, and method for reducing the current maximum in a light-emitting diode field
A technology of light-emitting diodes and regulating devices, applied in the direction of electrical components, etc., can solve problems such as increasing system power supply requirements, achieve reasonable cost/benefit trade-offs, and reduce the maximum current effect
Pending Publication Date: 2021-10-26
海拉有限双合股份公司
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- Application Information
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Problems solved by technology
This in turn increases the power requirements for these systems and can cause EMV (Electromagnetic Compatibility) issues
Method used
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[0080] figure 1 A block diagram of a circuit arrangement 5 according to the invention for controlling and / or regulating a field of light-emitting diodes 2 is shown.
[0081] The circuit arrangement 5 according to the invention can be realized, for example, by an integrated circuit, in particular a commodity chip or an ASIC. Other embodiments of the circuit arrangement 5 are quite conceivable.
[0082] The light-emitting diode field 2 is here assumed to be a matrix LED system, such as is used in newly developed motor vehicle headlights.
[0083] Each light emitting diode L.D 11 , L.D. 12 , ... arranged in rows and columns with each other. However, the invention is not limited to LED fields having LEDs arranged in rows and columns.
[0084] It is easily conceivable here that the light-emitting diode field 2 has light-emitting diodes L.D. 11 , L.D. 12 ,… in different arrangements.
[0085] LEDs with 15,000-25,000 light-emitting diodes are used in today's headlights 11 ,L...
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The invention relates to a control and / or regulating means for controlling and / or regulating a light-emitting diode field with n LEDs, where n>2, comprising outputs at which control and / or regulating signals can be tapped in order to control and / or regulate controllable switching elements, wherein switch-on times and / or switch-off times (I) of pulses can be defined by the control and / or regulating means using the control signals and / or regulating signals, one and / or more controllable switching elements (4) can be actuated during the ascertained pulse for an opening or closing process, a number of k groups can be defined, and each LED is assigned to one of the k groups such that each of the k groups j contains light-emitting diodes, where 1 <= j <= k; and (II) a reference time aj = a1...ak can be determined for each group and the switch-on and the switch-off time (I) of the pulse for each LED of each group can be ascertained on the basis of the reference time aj = a1...ak , where 1 <= p j <= m j .
Description
technical field [0001] The invention relates to a control and / or regulation device for controlling and / or regulating a light-emitting diode field (Leuchtdiodenfeld) with n LEDs, where n>2, the control and / or regulation device having an output, in which A control and / or regulating signal for controlling and / or regulating the controllable switching element is available at the output, with which the switch-on point of the pulse can be defined via the control signal and / or regulating signal and / or shutdown time point And one and / or more controllable switching elements can be controlled to close or open during certain pulses. [0002] The invention also relates to a circuit arrangement and a method for operating the circuit arrangement. Background technique [0003] In an LED field, the brightness of each individual pixel is controlled by a pulse width modulated (current) signal with pulses of pulse width PW=0...100%. [0004] In today's systems, all LEDs of the LED field ...
Claims
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IPC IPC(8): H05B45/10H05B45/32H05B47/155
CPCH05B47/155H05B45/10H05B45/32H05B45/325
Inventor B-U·哈格迈尔S·克诺普C·威尔克斯
Owner 海拉有限双合股份公司