DEVICE FOR OPERATING AN LED MODULE

The silicon reduction reactor with a silicon carbide catalyst addresses inefficiencies in silicon metal production from silicon tetrachloride by minimizing impurities and by-products, resulting in improved purity and yield.

DE60325093C5Inactive Publication Date: 2025-06-18SIGNIFY HOLDING BV
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Patent Information

Application Number
DE60325093
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2002-12-19
Filing Date
2003-12-11
Publication Date
2025-06-18
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing technologies for producing high-purity silicon metal from silicon tetrachloride fail to achieve efficient and cost-effective conversion due to the limitations of existing silicon reduction processes, particularly in the presence of impurities and by-products.

Method used

A process involving the use of a silicon reduction reactor with a silicon reduction catalyst, such as silicon carbide, to enhance the conversion efficiency and purity of silicon metal production by minimizing impurities and by-products.

Benefits of technology

The proposed process significantly improves the purity and yield of silicon metal production by reducing impurities and by-products, thereby enhancing the efficiency and economic viability of silicon metal production.

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Abstract

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Description

[0001] Concerning European patent EP 1 576 858 the 4th Senate (Nullity Senate) of the Federal Patent Court, based on the oral hearing of 17 May 2022 found to be right: I. European Patent 1 576 858 is declared invalid to the extent of claims 1 to 4 with effect for the territory of the Federal Republic of Germany.

Claims

[1] void [2] void [3] void [4] void [5] Supply device (1") according to claim 3, wherein the control device (34) comprises: - an adding device (4) for receiving a voltage reference signal and a high-frequency sawtooth signal, - a comparator (46) having an inverting input coupled to an output of the adding device (44) and a non-inverting input coupled to receive the sampled current, - an RS flip-flop (48) having a reset input coupled to an output of the comparator (46) and a set input coupled to receive a high-frequency clock signal, and - an AND gate (50) having a first input coupled to an output of the RS flip-flop (48) and a second input coupled to receive the low-frequency PWM switching signal component, the AND gate outputting the dual PWM switching signal. [6] Supply device (1") according to claim 3, wherein the control device (34) comprises: - an integrator (52) coupled to receive the sampled current, the integrator (52) forming an average of the sampled current, - a low-frequency sawtooth generator (58) having a variable user control input for varying a generated low-frequency sawtooth signal, - a first reference current source (56), - a low-frequency pulse width modulator (54) coupled to receive the average sampled current, the low-frequency sawtooth signal, and the first reference current, wherein the low-frequency pulse width modulator (54) varies a pulse width of the generated low-frequency PWM switching signal component in dependence on the average sampled current and the low-frequency sawtooth signal, - a sample and hold circuit (64) also coupled to receive the sampled current, the sample and hold circuit (64) having a control input for receiving the low-frequency PWM switching signal component as a gate signal, the sample and hold circuit outputting a peak current signal of the sampled current, - a second reference current source (68), - a high-frequency sawtooth generator (70) for generating a high-frequency sawtooth signal, - a high-frequency pulse width modulator (66) coupled to receive the peak current signal, the second reference current, and the high-frequency sawtooth signal, wherein the high-frequency pulse width modulator (66) varies a pulse width of the generated high-frequency PWM switching signal component in dependence on the peak current signal and the high-frequency sawtooth signal, and - an AND gate (62) having a first input for receiving the low-frequency PWM switching signal component and a second input for receiving the high-frequency PWM switching signal component, the AND gate (62) outputting the dual PWM switching signal.

Citation Information

Patent Citations

  • Supply assembly for a LED lighting module

    EP1576858A1