Color sensor and color sensing device using the same
AssigneesLite-On Technology Corporation, Lite-On Singapore Pte. Ltd.
InventorsI-Chen CHIEN, Ruitao ZHENG
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Abstract
A color sensing device including a color sensor and a processing unit is provided. The color sensor is provided with at least three photosensitive areas and used for generating at least three photosensitive signals. The processing unit is connected to the color sensor and used for processing the at least three photosensitive signals to correspondingly generate at least three color signal tuples CIE(X,Y,Z). Two of the at least three color signal tuples CIE(X,Y,Z) share one of the photosensitive signals.
Claims10
A color sensor used for converting a spectral function into color coordinates on a CIE (International Commission on Illumination) color space, wherein the color sensor comprises:
- a semiconductor chip provided with a plurality of photosensitive areas;
- and
- three filters correspondingly disposed on three of the photosensitive areas and used for defining three spectral functions of three stimulus values on the CIE color space, wherein the spectral functions of stimulus values X1 and Z on the CIE color space share one of the filters,
- wherein the spectral function of stimulus value Z is represented by the spectral function of stimulus value X1, or the spectral function of the stimulus value X1 is represented by the spectral function of stimulus value Z, or the spectral function of stimulus value Z and the spectral function of stimulus value X1 are represented by the spectral function of stimulus value (X1+Z)/2, respectively.
A color sensing device, comprising:
- a color sensor implemented on a chip and used for generating at least three photosensitive signals, which indicate a color of incident light of the color sensor;
- a processing unit implemented on the chip, connected to the color sensor, and used for processing the at least three photosensitive signals to generate four channel signals;
- a control unit connected to the processing unit and used for receiving and processing the four channel signals to generate three sets of color signal tuples CIE(X,Y,Z) (International Commission on Illumination), wherein a spectral function of stimulus value Z is represented by a spectral function of stimulus value X1, or the spectral function of the stimulus value X1 is represented by the spectral function of stimulus value Z, or the spectral function of stimulus value Z and the spectral function of stimulus value X1 are represented by a spectral function of stimulus value (X1+Z)/2, respectively;
- and
- an interface connected to the processing unit, wherein the interface comprises an interface terminal.
Dependencies are inferred from the claim text.