National Yang Ming Chiao Tung University

Askey Computer Corporation

Chun-Chieh Liao

Mang Ou-Yang

Yung-Jhe Yan

Ting-Feng Wang

A rotary coding disc and a method for designing the same is applied to an optical encoder. N-bit De Bruijn sequences include 1 and 0. The N-bit De Bruijn sequence has the maximum binary code and the minimum binary code. When a binary code having M bits is located between the maximum binary code and the minimum binary code, the corresponding N-bit De Bruijn sequences are selected as diagonal De Bruijn sequences, wherein The De Bruijn sequence may be converted into a De Bruijn energy level. The total number of 1 consecutively neighboring 0 and (N&#x2212;1) consecutively neighboring N of the De Bruijn energy level is calculated. The transparent areas and the opaque areas are located based on the De Bruijn sequence or the De Bruijn energy level that corresponds to the total number less than or equal to N.

Rotary coding disc and method for designing the same

A light measurement system measures light characteristics of a plurality of light sources and includes a processing unit, a plurality of capturing modules, a plurality of signal conversion units, and a demultiplexing unit. The processing unit generates a control signal for controlling the capturing modules to capture the light characteristics of the light sources. After capturing the light characteristics, the capturing modules output captured frequency-related data corresponding to the light characteristics respectively. Then, the capture frequency-related data are converted into capture bit codes by the signal conversion units respectively. Under the control of the processing unit, the demultiplexing unit selectively sends the capture bit code of each of the signal conversion units to the processing unit. Accordingly, the light measurement system measures the light sources synchronously and allows the demultiplexing unit to send the capture bit code of any one of the light sources to the processing unit.

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Taipei, Taiwan

Chun-Chieh Liao