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Decoding circuit and decoding method

A decoding circuit and decoding method technology, which is applied in the direction of electric lamp circuit layout, electric light source, electric digital data processing, etc., can solve the problems of signal distortion, chip cannot correctly decode data, etc.

Inactive Publication Date: 2013-12-11
MY SEMI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since LED driver chips are usually connected in series to transmit DMX512, if too many chips are connected in series, the signal will be distorted, and the data cannot be decoded correctly for the chips connected in series.

Method used

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  • Decoding circuit and decoding method
  • Decoding circuit and decoding method
  • Decoding circuit and decoding method

Examples

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no. 1 example

[0030] figure 1 It is a block diagram of a decoding circuit according to the first embodiment of the present invention. Please refer to figure 1 , the decoding circuit 100 includes a detection unit 102 and a decoding unit 104 connected with the detection unit 102 . The decoding circuit 100 can be integrated in a driving chip of a light-emitting diode for decoding the driving data of the DMX512 signal frame. The driving chip controls the light and dark changes of the light-emitting diodes according to the driving data to produce different lighting effects. The decoding unit 104 is, for example, a DMX512 decoder, which can be used to detect the input signal corresponding to the DMX512 signal format, such as the DMX512 signal format of 2-fold or 4-fold. Since the signal waveform may be distorted when the signal is transmitted in the serial connection system, the input signal can be inverted and then transmitted during the transmission process, which can avoid the problem of wa...

no. 2 example

[0041] Figure 4 It is a flowchart of the decoding method according to the second embodiment of the present invention. Please refer to Figure 4 , the decoding method of the decoding circuit 100 can be summarized into the following steps: First, an input signal is received (step S402 ). Next, it is detected whether the input signal is maintained at a specific level and exceeds a preset time (step S404). Finally, if the input signal is maintained at a specific level and exceeds a preset time, the input signal or the inverted input signal is output to the decoding unit 104 in the decoding circuit 100 for decoding according to the level of the specific level (step S406 ). In this way, it can be ensured that the decoding circuit 100 decodes the correct driving data to generate the expected display effect.

[0042] In detail, the above-mentioned step S406 can be performed by Figure 5 express, Figure 5 for Figure 4 The flow chart of step S406 of the second embodiment of the...

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Abstract

The invention provides a decoding circuit and a decoding method. The decoding circuit is suitable for decoding an input signal, wherein the input signal comprises at least one interrupt, and the duration of the interrupt is a preset time; the decoding circuit comprises a decoding unit and a detecting unit; the detecting unit is used for detecting whether the input signal is maintained in a specific level and exceeds the preset time; and when the input signal is maintained in the specific level and exceeds the preset time, the detecting unit determines to output the input signal or an inversed input signal to the decoding unit to decode according to the level of the specific level.

Description

technical field [0001] The present invention relates to a decoding circuit and a decoding method thereof, and in particular to a decoding circuit of a DMX512 signal format and a decoding method thereof. Background technique [0002] The DMX512 protocol was first a data transmission standard proposed by the United States of Institutes for Theater Technology (USITT) in 1986. It is a commonly used control protocol in the field of entertainment lighting. DMX512 communication mode adopts asynchronous communication format, each dimming data consists of 11 bytes, including one is the start time, 8 data bytes and two stop bits, each time can transmit 512 dimming data . The current stage lighting control mostly uses the DMX512 protocol for stage lighting control. [0003] In the DMX512 protocol, each data transmission includes a break signal and several data signals, wherein the break signal is usually a logic low level of 88 microseconds. This interrupt is the start signal of dat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/42H05B37/00
CPCY02B20/42Y02B20/40
Inventor 郭俊廷林俊甫谢政翰
Owner MY SEMI