Optical senser, data processing apparatus and method
A technology of a data processing device and an optical sensor, which is applied in electrical digital data processing, input/output process of data processing, instruments, etc., can solve the problems of huge amount of signal data, and the speed of Fourier transform data processing cannot meet the needs of consumers. , to achieve the effect of avoiding laser spots, meeting the requirements of speed, and accelerating the speed
Inactive Publication Date: 2008-01-30
BENQ CORP
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Problems solved by technology
However, due to the huge amount of signal data to be processed by optical sensors generally used in consumer electronics products, the data processing speed of Fourier transform often cannot meet the needs of consumers
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[0015] In order to further understand the above-mentioned objects, features and advantages of the present invention, the preferred embodiments are described in detail below with reference to the accompanying drawings:
[0016] Please refer to FIG. 1 , which shows a structural block diagram of an optical sensor according to a preferred embodiment of the present invention. The optical sensor 100 is, for example, a mouse, and is used for sensing relative movement with an object O, such as a desktop. The optical sensor 100 includes a first sensing element 110 , a first modulation unit 112 , a second sensing element 120 , a second modulation unit 122 and a data processing device 130 . The data processing device 130 includes a first timing control unit 140 , a second timing control unit 150 and a Fourier transform unit 160 . The first sensing element 110 and the second sensing element 120 are, for example, sensing elements that sense movement in the X-direction and movement in the ...
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An optical sensor comprises a sensing element, a timing control unit and a fourier conversion unit. The sensing element can sense and detect objects that have relative displacement according to a modulating signal then output a sensing signal depending on the objects that have relative displacement. The sensing signal comprises a first part sensing signal that is corresponding to a first timing period and a second part sensing signal that is corresponding to a second timing period. The timing control unit receives the sensing signal and captures the first part sensing signal and the second part sensing signal to process signals to output a data signal which comprises a first digital data signal corresponding to the first part sensing signal with the same timing as a second digital data signal corresponding with the second part sensing signal. The fourier conversion unit receives the data signal and leads the fourier conversion towards the first and second digital data signals to generate a needed signal frequency spectrum analysis.
Description
technical field [0001] The invention relates to an optical sensor and a data processing device and method thereof, in particular to a self-mixing optical sensor using Fast Fourier Transfer and a data processing device and method thereof. Background technique [0002] A traditional self-mixing optical sensor, such as a pointer or a mouse, uses a comparator and a pulse counter to calculate the number of carrier waves carried on each modulated signal, and then calculates the corresponding sensing signal frequency. However, due to the problems of speckle, poor analog signal matching, and low signal-to-noise ratio in the sensing signal generated by the optical sensor, the above method of deriving the frequency of the sensing signal is quite difficult. [0003] In order to solve the above problems, the prior art uses fast Fourier transform to process the data from the hybrid optical sensor, so as to reduce the above-mentioned interference and misjudgment caused by light spot, anal...
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Login to View More IPC IPC(8): G06F17/14G06F3/033G06F3/0354
Inventor 马国栋
Owner BENQ CORP