Optical sensing device and optical sensing method thereof

Abstract

An optical sensing device and an optical sensing method thereof are disclosed. The optical sensing device includes a first sensor, a second sensor, a third sensor and a fourth sensor for sensing light to generate a first sensing signal, a second sensing signal, a third sensing signal and a fourth sensing signal respectively. A spectrum of a coating of the first sensor includes a first peak of an X spectrum. A spectrum of a coating of the second sensor includes a second peak of the X spectrum. A spectrum of a coating of the third sensor includes a Y spectrum. A spectrum of a coating of the fourth sensor includes a Z spectrum. The first sensing signal and the second sensing signal determine an X output value, and the third sensing signal and the fourth sensing signal determine a Y output value and a Z output value respectively.

Description

TECHNICAL FIELD

[0001] The present application relates to an optical sensing device, and more particularly, to an optical sensing device and method for sensing a correlated color temperature. BACKGROUND

[0002] The XYZ color space defined by the Commission Internationale de L'Eclairage (CIE) can be used to more accurately calculate a correlated color temperature (CCT) than the RGB color space defined by the CIE. Figure 1 X-spectrum 10, Y-spectrum 12 and Z-spectrum 14 of the CIE XYZ color space are shown. Figure 2 A conventional optical sensing device 20 for sensing light to generate a color temperature value is shown. The optical sensing device 20 includes three sensors 22, 24 and 26 and a processing circuit (not shown). The sensor 22 includes a coating 222 and a photodiode 224, wherein the spectrum of the coating 222 includes the X-spectrum 10. The sensor 24 includes a coating 242 and a photodiode 244, wherein the spectrum of the coating 242 includes the Y-spectrum 12. The sensor 26 includes a coating 262 and a photodiode 264, wherein the spectrum of the coating 262 includes the Z-spectrum 14. The processing circuit determines the color temperature value based on sensing signals outputted by the sensors 22, 24 and 26.

[0003] However, the X-spectrum 10 of the coating 222 includes a first peak 101 (low peak) on the left side and a second peak 102 (high peak) on the right side, as shown. Figure 1 The coating 222 with both low and high peaks is difficult to configure and manufacture, and requires expensive materials such as titanium dioxide (TiO2) or silicon dioxide (SiO2) to manufacture. In addition, the X-spectrum of the coating 222 can actually have a third peak 103 (medium peak) between the first and second peaks 101 and 102, as shown. Figure 3The spectrum weight distortion, peak mismatch, and peak flaw, or the height ratio of the right peak to the left peak deviates from the ideal 1.06:0.35. The spectrum weight distortion means that the sensitivity appears at the position where it should not. The peak mismatch means that the peak appears at the position where it should not. The peak flaw means that the position has a corresponding peak, but the waveform is problematic, which can be deformation or too wide / narrow. Since the processing circuit of the optical sensing device 20 can only perform linear compensation and cannot compensate for a single peak, the aforementioned problems cannot be compensated by the processing circuit. Once the X spectrum 10 of the coating 222 has an error, it will directly affect the sensing result of the optical sensing device 20. Moreover, since it is not easy to obtain an ideal X spectrum, the process yield of the optical sensing device 20 is not high, and the cost is high. SUMMARY

[0004] One of the purposes of the present application is to provide an optical sensing device with a higher process yield and an optical sensing method thereof.

[0005] To achieve the above purpose, the present application provides an optical sensing device, comprising a first sensor, a second sensor, a third sensor, a fourth sensor, and a processing circuit. The first sensor comprises a first coating, the spectrum of the first coating includes a first peak of an X spectrum, and the first sensor is used to sense light to generate a first sensing signal. The second sensor comprises a second coating, the spectrum of the second coating includes a second peak of the X spectrum, and the second sensor is used to sense the light to generate a second sensing signal. The third sensor comprises a third coating, the spectrum of the third coating includes a Y spectrum, and the third sensor is used to sense the light to generate a third sensing signal. The fourth sensor comprises a fourth coating, the spectrum of the fourth coating includes a Z spectrum, and the fourth sensor is used to sense the light to generate a fourth sensing signal. The processing circuit is connected to the first sensor, the second sensor, the third sensor, and the fourth sensor, and generates an X output value according to the first sensing signal and the second sensing signal, and generates a Y output value and a Z output value according to the third sensing signal and the fourth sensing signal, respectively.

[0006] To achieve the above object, the present application also provides an optical sensing method, comprising: sensing a light using a first sensor to generate a first sensing signal, wherein the first sensor comprises a first coating film, and a spectrum of the first coating film comprises a first peak of an X spectrum; sensing the light using a second sensor to generate a second sensing signal, wherein the second sensor comprises a second coating film, and a spectrum of the second coating film comprises a second peak of the X spectrum; sensing the light using a third sensor to generate a third sensing signal, wherein the third sensor comprises a third coating film, and a spectrum of the third coating film comprises a Y spectrum; sensing the light using a fourth sensor to generate a fourth sensing signal, wherein the fourth sensor comprises a fourth coating film, and a spectrum of the fourth coating film comprises a Z spectrum; and generating an X output value according to the first sensing signal and the second sensing signal, and generating a Y output value and a Z output value according to the third sensing signal and the fourth sensing signal respectively.

[0007] The coating films of the optical sensing device of the present application are simple to make, and can be made of cheaper materials. In addition, since the spectra of the first sensor and the second sensor only have single peaks, even if the spectra of the first coating film and the second coating film have problems, the optical sensing device of the present application can be linearly compensated by the processing circuit to solve the problems, so that the process yield can be higher. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 X spectrum, Y spectrum and Z spectrum of CIE XYZ color space are shown.

[0009] Figure 2 A conventional optical sensing device is shown.

[0010] Figure 3 X spectrum of a conventional coating film is shown.

[0011] Figure 4 An optical sensing device of the present application is shown.

[0012] Figure 5 An embodiment of the present application is shown. Figure 4 Spectra of the first coating film, the second coating film, the third coating film and the fourth coating film in the embodiment of the present application are shown.

[0013] Figure 6 A second embodiment of the processing circuit of the present application is shown.

[0014] Figure 7 An embodiment of the color processing unit in the embodiment of the present application is shown. Figure 4 andAn embodiment of the color processing unit in the embodiment of the present application is shown. Figure 6

[0015] An optical sensing method of the present application is shown. Figure 8

[0016] Legend: 10 - X spectrum; 101 - first peak; 102 - second peak; 12 - Y spectrum; 14 - Z spectrum; 20 - optical sensing device; 22 - sensor; 222 - coating; 224 - photodiode; 24 - sensor; 242 - coating; 244 - photodiode; 26 - sensor; 262 - coating; 264 - photodiode; 30 - optical sensing device; 31 - first sensor; 311 - first coating; 312 - photodiode; 32 - second sensor; 321 - second coating; 322 - photodiode; 33 - third sensor; 331 - third coating; 332 - photodiode; 34 - fourth sensor; 341 - fourth coating; 342 - photodiode; 35 - processing circuit; 351 - sensitivity enhancement circuit; 352 - color processing unit; 3521 - buffer; 3522 - first multiplier; 3523 - second multiplier; 3524 - third multiplier; 3525 - fourth multiplier; 3526 - adder; 3527 - calculation circuit. DETAILED DESCRIPTION

[0017] Figure 4 An optical sensing device 30 according to the present application is shown, which comprises a first sensor 31, a second sensor 32, a third sensor 33, a fourth sensor 34 and a processing circuit 35. The first sensor 31 senses light to generate a first sensing signal S1, and the first sensor 31 comprises a first coating 311 and a photodiode 312, wherein the spectrum of the first coating 311 comprises the first peak 101 (low peak) of the X spectrum 10. The second sensor 32 senses light to generate a second sensing signal S2, and the second sensor 32 comprises a second coating 321 and a photodiode 322, wherein the spectrum of the second coating 321 comprises the second peak 102 (high peak) of the X spectrum 10. The third sensor 33 senses light to generate a third sensing signal S3, and the third sensor 33 comprises a third coating 331 and a photodiode 332, wherein the spectrum of the third coating 331 comprises the Y spectrum 12. The fourth sensor 34 senses light to generate a fourth sensing signal S4, and the fourth sensor 34 comprises a fourth coating 341 and a photodiode 342, wherein the spectrum of the fourth coating 341 comprises the Z spectrum 14. The processing circuit 35 determines a color temperature value CT according to the first sensing signal S1, the second sensing signal S2, the third sensing signal S3 and the fourth sensing signal S4. A terminal device (not shown) connected to the optical sensing device 30, such as a client platform, can determine a relative color temperature according to the color temperature value CT.

[0018] As Figure 5As shown, the spectra of the first sensor 31, the second sensor 32, the third sensor 33 and the fourth sensor 34 all only contain one peak, so the first coating 311, the second coating 321, the third coating 331 and the fourth coating 341 are relatively simple to make and can be made of cheaper materials. In an embodiment, the materials of the first coating 311, the second coating 321, the third coating 331 and the fourth coating 341 include but are not limited to silver. Even if the spectra of the coatings 311, 321, 331 and 341 have imperfections, the optical sensing device 30 can be linearly compensated by the processing circuit 35 to solve. Therefore, the process yield of the optical sensing device 30 is higher.

[0019] In Figure 4In the embodiment of the present application, the processing circuit 35 comprises a sensitivity improvement circuit 351, a first trans-impedance amplifier TIA1, a second trans-impedance amplifier TIA2, a third trans-impedance amplifier TIA3, a fourth trans-impedance amplifier TIA4, a first analog-to-digital converter ADC1, a second analog-to-digital converter ADC2, a third analog-to-digital converter ADC3, a fourth analog-to-digital converter ADC4, and a color processing unit 352. The sensitivity improvement circuit 351 is connected to the first sensor 31, the second sensor 32, the third sensor 33, and the fourth sensor 34, and is used to compensate the first sensing signal S1, the second sensing signal S2, the third sensing signal S3, and the fourth sensing signal S4 to generate a fifth sensing signal S5, a sixth sensing signal S6, a seventh sensing signal S7, and an eighth sensing signal S8, respectively. The first trans-impedance amplifier TIA1 is connected to the sensitivity improvement circuit 351, and converts the fifth sensing signal S5 into a first voltage A1. The second trans-impedance amplifier TIA2 is connected to the sensitivity improvement circuit 351, and converts the sixth sensing signal S6 into a second voltage A2. The third trans-impedance amplifier TIA3 is connected to the sensitivity improvement circuit 351, and converts the seventh sensing signal S7 into a third voltage A3. The fourth trans-impedance amplifier TIA4 is connected to the sensitivity improvement circuit 351, and converts the eighth sensing signal S8 into a fourth voltage A4. The first analog-to-digital converter ADC1 is connected to the first trans-impedance amplifier TIA1, and converts the first voltage A1 into a first digital signal D1. The second analog-to-digital converter ADC2 is connected to the second trans-impedance amplifier TIA2, and converts the second voltage A2 into a second digital signal D2. The third analog-to-digital converter ADC3 is connected to the third trans-impedance amplifier TIA3, and converts the third voltage A3 into a third digital signal D3. The fourth analog-to-digital converter ADC4 is connected to the fourth trans-impedance amplifier TIA4, and converts the fourth voltage A4 into a fourth digital signal D4. The color processing unit 352 is connected to the first analog-to-digital converter ADC1, the second analog-to-digital converter ADC2, the third analog-to-digital converter ADC3, and the fourth analog-to-digital converter ADC4, and determines the color temperature value CT according to the first digital signal D1, the second digital signal D2, the third digital signal D3, and the fourth digital signal D4.

[0020] Since the optical sensing device 30 of the present application needs four sensors 31, 32, 33, and 34, the optical sensing device 30 of the present application uses the sensitivity improvement circuit 351 to compensate the sensitivity. Specifically, the sensitivity improvement circuit 351 can multiply the first sensing signal S1, the second sensing signal S2, the third sensing signal S3, and the fourth sensing signal S4 outputted by the first sensor 31, the second sensor 32, the third sensor 33, and the fourth sensor 34 by 4 / 3 respectively to generate the fifth sensing signal S5, the sixth sensing signal S6, the seventh sensing signal S7, and the eighth sensing signal S8.

[0021] In another embodiment, the sensitivity enhancement circuit 351 may also be integrated into the first transimpedance amplifier TIA1, the second transimpedance amplifier TIA2, the third transimpedance amplifier TIA3, and the fourth transimpedance amplifier TIA4. Figure 6 A second embodiment of the display processing circuit 35. In Figure 6 In the circuit, the processing circuit 35 includes a first transimpedance amplifier TIA1, a second transimpedance amplifier TIA2, a third transimpedance amplifier TIA4, a fourth transimpedance amplifier TIA4, a first analog-to-digital converter ADC1, a second analog-to-digital converter ADC2, a third analog-to-digital converter ADC3, a fourth analog-to-digital converter ADC4, and a color processing unit 352. The first transimpedance amplifier TIA1 is connected to the first sensor 31 and amplifies the first sensing signal S1 and converts it into a first voltage A1 according to a compensation gain G1 (not shown). The second transimpedance amplifier TIA2 is connected to the second sensor 32 and amplifies the second sensing signal S2 and converts it into a second voltage A2 according to a compensation gain G2 (not shown). The third transimpedance amplifier TIA3 is connected to the third sensor 33 and amplifies the third sensing signal S3 and converts it into a third voltage A3 according to a compensation gain G3 (not shown). The fourth transimpedance amplifier TIA4 is connected to the fourth sensor 34 and amplifies the fourth sensing signal S4 and converts it into a fourth voltage A4 according to a compensation gain G4 (not shown). The first analog-to-digital converter (ADC1) is connected to the first transimpedance amplifier (TIA1), converting the first voltage A1 into a first digital signal D1. The second ADC2 is connected to the second transimpedance amplifier (TIA2), converting the second voltage A2 into a second digital signal D2. The third ADC3 is connected to the third transimpedance amplifier (TIA3), converting the third voltage A3 into a third digital signal D3. The fourth ADC4 is connected to the fourth transimpedance amplifier (TIA4), converting the fourth voltage A4 into a fourth digital signal D4. The color processing unit 352 is connected to the first ADC1, second ADC2, third ADC3, and fourth ADC4, and determines the color temperature value CT based on the first digital signal D1, second digital signal D2, third digital signal D3, and fourth digital signal D4. In this embodiment, compensation gains G1, G2, G3, and G4 are used to compensate for sensitivity. In one embodiment, the compensation gains G1, G2, G3 and G4 can be 4 / 3, so that with a fixed total number of sensors (e.g., a 6×6 sensing matrix), the present invention can also achieve the sensitivity level of a conventional optical sensing device 20.

[0022] In the above embodiments, the first to eighth sensing signals are current signals, and the transimpedance amplifier amplifies the received current signals and converts them into voltage signals.

[0023] Figure 7 show Figure 4 and Figure 6 An embodiment of the color processing unit 352 is described. The color processing unit 352 includes a buffer 3521, a first multiplier 3522, a second multiplier 3523, a third multiplier 3524, a fourth multiplier 3525, an adder 3526, and a calculation circuit 3527. The buffer 3521 is used to store and provide a first calibration coefficient C1, a second calibration coefficient C2, a third calibration coefficient C3, and a fourth calibration coefficient C4. The first multiplier 3522 is connected to the buffer 3521 and the first analog-to-digital converter ADC1, and is used to multiply the first digital signal D1 by the first calibration coefficient C1 to generate a first sub-output value SO1. The second multiplier 3523 is connected to the buffer 3521 and the second analog-to-digital converter ADC2, and is used to multiply the second digital signal D2 by the second calibration coefficient C2 to generate a second sub-output value SO2. Adder 3526 is connected to first multiplier 3522 and second multiplier 3523 to add the first sub-output value SO1 and the second sub-output value SO2 to generate the X output value XO. Third multiplier 3524 is connected to buffer 3521 and third analog-to-digital converter ADC3 to multiply the third digital signal D3 by the third calibration coefficient C3 to generate the Y output value YO. Fourth multiplier 3525 is connected to buffer 3521 and fourth analog-to-digital converter ADC4 to multiply the fourth digital signal D4 by the fourth calibration coefficient C4 to generate the Z output value ZO. Calculation circuit 3527 is connected to third multiplier 3524, fourth multiplier 3525, and adder 3526 to generate the color temperature value CT based on the X output value XO, Y output value YO, and Z output value ZO.

[0024] From the above description, it can be understood that the optical sensing method of the present invention can be expressed as follows: Figure 8 As shown, it includes the following steps:

[0025] Step S10: Use a first sensor to sense a light to generate a first sensing signal, wherein the first sensor includes a first coating and the spectrum of the first coating includes a first peak of the X-ray spectrum.

[0026] Step S11: Use a second sensor to sense the light and generate a second sensing signal, wherein the second sensor includes a second coating and the spectrum of the second coating includes the second peak of the X spectrum;

[0027] Step S12: Use a third sensor to sense the light and generate a third sensing signal, wherein the third sensor includes a third coating and the spectrum of the third coating includes the Y spectrum;

[0028] Step S13: sensing the light to generate a fourth sensing signal using a fourth sensor, wherein the fourth sensor comprises a fourth coating, and a spectrum of the fourth coating comprises Z spectrum;

[0029] Step S14: generating an X output value according to the first sensing signal and the second sensing signal, and generating a Y output value and a Z output value according to the third sensing signal and the fourth sensing signal respectively; and

[0030] Step S15: generating a color temperature value according to the X output value, the Y output value and the Z output value.

[0031] The above merely describes the embodiments of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical contents to obtain equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still belongs to the scope of the technical solution of the present application.

Claims

1. An optical sensing device, characterized in that, include: A first sensor includes a first coating whose spectrum includes a first peak of an X-ray spectrum, the first sensor being used to sense light and generate a first sensing signal; A second sensor includes a second coating, the spectrum of which includes a second peak of the X spectrum, and the second sensor is used to sense the light to generate a second sensing signal; A third sensor includes a third coating whose spectrum includes the peak of the Y spectrum, and the third sensor is used to sense the light to generate a third sensing signal. A fourth sensor, comprising a fourth coating whose spectrum includes a peak in the Z spectrum, the fourth sensor being used to sense the light to generate a fourth sensing signal; and A processing circuit is connected to the first sensor, the second sensor, the third sensor and the fourth sensor. The processing circuit generates an X output value based on the first sensing signal and the second sensing signal, and generates a Y output value and a Z output value based on the third sensing signal and the fourth sensing signal, respectively. The processing circuit includes: A sensitivity enhancement circuit is connected to the first sensor, the second sensor, the third sensor and the fourth sensor to compensate the first sensing signal, the second sensing signal, the third sensing signal and the fourth sensing signal to generate a fifth sensing signal, a sixth sensing signal, a seventh sensing signal and an eighth sensing signal respectively. A first transimpedance amplifier is connected to the sensitivity enhancement circuit to convert the fifth sensing signal into a first voltage. A second transimpedance amplifier is connected to the sensitivity enhancement circuit to convert the sixth sensing signal into a second voltage. A third transimpedance amplifier is connected to the sensitivity enhancement circuit to convert the seventh sensing signal into a third voltage. A fourth transimpedance amplifier is connected to the sensitivity enhancement circuit to convert the eighth sensing signal into a fourth voltage. A first analog-to-digital converter, connected to the first transimpedance amplifier, converts the first voltage into a first digital signal; A second analog-to-digital converter, connected to the second transimpedance amplifier, converts the second voltage into a second digital signal; A third analog-to-digital converter, connected to the third transimpedance amplifier, converts the third voltage into a third digital signal; A fourth analog-to-digital converter, connected to the fourth transimpedance amplifier, converts the fourth voltage into a fourth digital signal; and A color processing unit is connected to the first analog-to-digital converter, the second analog-to-digital converter, the third analog-to-digital converter and the fourth analog-to-digital converter. It determines the X output value based on the first digital signal and the second digital signal, determines the Y output value based on the third digital signal and determines the Z output value based on the fourth digital signal. The color processing unit includes: A buffer for providing a first calibration coefficient, a second calibration coefficient, a third calibration coefficient, and a fourth calibration coefficient; A first multiplier, connected to the buffer and the first analog-to-digital converter, is used to multiply the first digital signal by the first calibration coefficient to generate a first sub-output value; A second multiplier, connected to the buffer and the second analog-to-digital converter, is used to multiply the second digital signal by the second calibration coefficient to generate a second sub-output value; An adder, connected to the first multiplier and the second multiplier, is used to add the first sub-output value and the second sub-output value to generate the X output value; A third multiplier, connected to the buffer and the third analog-to-digital converter, is used to multiply the third digital signal by the third calibration coefficient to generate the Y output value; and A fourth multiplier, connected to the buffer and the fourth analog-to-digital converter, is used to multiply the fourth digital signal by the fourth calibration coefficient to generate the Z output value.

2. The optical sensing device as claimed in claim 1, characterized in that, The processing circuit also includes generating a color temperature value based on the X output value, the Y output value, and the Z output value.

3. The optical sensing device as claimed in claim 1, characterized in that, The first sensor, the second sensor, the third sensor and the fourth sensor each include a photodiode.

4. The optical sensing device as claimed in claim 1, characterized in that, The materials of the first coating, the second coating, the third coating, and the fourth coating include silver.

5. An optical sensing device, characterized in that, include: A first sensor includes a first coating whose spectrum includes a first peak of an X-ray spectrum, the first sensor being used to sense light and generate a first sensing signal; A second sensor includes a second coating, the spectrum of which includes a second peak of the X spectrum, and the second sensor is used to sense the light to generate a second sensing signal; A third sensor includes a third coating whose spectrum includes the peak of the Y spectrum, and the third sensor is used to sense the light to generate a third sensing signal. A fourth sensor, comprising a fourth coating whose spectrum includes a peak in the Z spectrum, the fourth sensor being used to sense the light to generate a fourth sensing signal; and A processing circuit is connected to the first sensor, the second sensor, the third sensor and the fourth sensor. The processing circuit generates an X output value based on the first sensing signal and the second sensing signal, and generates a Y output value and a Z output value based on the third sensing signal and the fourth sensing signal, respectively. The processing circuit includes: A first transimpedance amplifier is connected to the first sensor to amplify the first sensing signal and convert it into a first voltage. A second transimpedance amplifier is connected to the second sensor to amplify the second sensing signal and convert it into a second voltage. A third transimpedance amplifier is connected to the third sensor to amplify the third sensing signal and convert it into a third voltage. A fourth transimpedance amplifier is connected to the fourth sensor to amplify the fourth sensing signal and convert it into a fourth voltage. A first analog-to-digital converter, connected to the first transimpedance amplifier, converts the first voltage into a first digital signal; A second analog-to-digital converter, connected to the second transimpedance amplifier, converts the second voltage into a second digital signal; A third analog-to-digital converter, connected to the third transimpedance amplifier, converts the third voltage into a third digital signal; A fourth analog-to-digital converter, connected to the fourth transimpedance amplifier, converts the fourth voltage into a fourth digital signal; and A color processing unit is connected to the first analog-to-digital converter, the second analog-to-digital converter, the third analog-to-digital converter, and the fourth analog-to-digital converter. It determines the X output value based on the first digital signal and the second digital signal, determines the Y output value based on the third digital signal, and determines the Z output value based on the fourth digital signal. The color processing unit includes: A buffer for providing a first calibration coefficient, a second calibration coefficient, a third calibration coefficient, and a fourth calibration coefficient; A first multiplier, connected to the buffer and the first analog-to-digital converter, is used to multiply the first digital signal by the first calibration coefficient to generate a first sub-output value; A second multiplier, connected to the buffer and the second analog-to-digital converter, is used to multiply the second digital signal by the second calibration coefficient to generate a second sub-output value; An adder, connected to the first multiplier and the second multiplier, is used to add the first sub-output value and the second sub-output value to generate the X output value; A third multiplier, connected to the buffer and the third analog-to-digital converter, is used to multiply the third digital signal by the third calibration coefficient to generate the Y output value; and A fourth multiplier, connected to the buffer and the fourth analog-to-digital converter, is used to multiply the fourth digital signal by the fourth calibration coefficient to generate the Z output value.

6. The optical sensing device as claimed in claim 5, characterized in that, The processing circuit also includes generating a color temperature value based on the X output value, the Y output value, and the Z output value.

7. The optical sensing device as claimed in claim 5, characterized in that, The first sensor, the second sensor, the third sensor and the fourth sensor each include a photodiode.

8. The optical sensing device as claimed in claim 5, characterized in that, The materials of the first coating, the second coating, the third coating, and the fourth coating include silver.

9. An optical sensing method, characterized in that, Includes the following steps: A first sensor is used to sense light to generate a first sensing signal, wherein the first sensor includes a first coating and the spectrum of the first coating includes a first peak of the X-ray spectrum. A second sensor is used to sense the light to generate a second sensing signal, wherein the second sensor includes a second coating and the spectrum of the second coating includes a second peak of the X spectrum; A third sensor is used to sense the light to generate a third sensing signal, wherein the third sensor includes a third coating and the spectrum of the third coating includes the peak of the Y spectrum; A fourth sensor is used to sense the light to generate a fourth sensing signal, wherein the fourth sensor includes a fourth coating and the spectrum of the fourth coating includes the peak of the Z spectrum. as well as An X output value is generated based on the first sensing signal and the second sensing signal, and a Y output value and a Z output value are generated based on the third sensing signal and the fourth sensing signal, respectively. The steps for generating the X output value, the Y output value, and the Z output value include: The first sensing signal, the second sensing signal, the third sensing signal, and the fourth sensing signal are compensated to generate a fifth sensing signal, a sixth sensing signal, a seventh sensing signal, and an eighth sensing signal, respectively. The fifth sensing signal, the sixth sensing signal, the seventh sensing signal, and the eighth sensing signal are respectively converted into a first voltage, a second voltage, a third voltage, and a fourth voltage; The first voltage, the second voltage, the third voltage, and the fourth voltage are respectively converted into a first digital signal, a second digital signal, a third digital signal, and a fourth digital signal; The output value of X is determined based on the first digital signal and the second digital signal; The Y output value is determined based on the third digital signal; and The Z output value is determined based on the fourth digital signal; The steps for determining the X output value, the Y output value, and the Z output value include: Multiply the first digital signal by a first calibration coefficient to generate a first sub-output value; Multiply the second digital signal by a second calibration coefficient to generate a second sub-output value; The first sub-output value is added to the second sub-output value to generate the X output value; The third digital signal is multiplied by a third calibration coefficient to produce the Y output value; and The fourth digital signal is multiplied by a fourth calibration coefficient to produce the Z output value.

10. The optical sensing method as described in claim 9, characterized in that, It also includes generating a color temperature value based on the X output value, the Y output value, and the Z output value.

11. An optical sensing method, characterized in that, Includes the following steps: A first sensor is used to sense light to generate a first sensing signal, wherein the first sensor includes a first coating and the spectrum of the first coating includes a first peak of the X-ray spectrum. A second sensor is used to sense the light to generate a second sensing signal, wherein the second sensor includes a second coating and the spectrum of the second coating includes a second peak of the X spectrum; A third sensor is used to sense the light to generate a third sensing signal, wherein the third sensor includes a third coating and the spectrum of the third coating includes the peak of the Y spectrum; A fourth sensor is used to sense the light to generate a fourth sensing signal, wherein the fourth sensor includes a fourth coating and the spectrum of the fourth coating includes the peak of the Z spectrum. as well as An X output value is generated based on the first sensing signal and the second sensing signal, and a Y output value and a Z output value are generated based on the third sensing signal and the fourth sensing signal, respectively. The steps for generating the X output value, the Y output value, and the Z output value include: The first sensing signal, the second sensing signal, the third sensing signal, and the fourth sensing signal are amplified and converted into a first voltage, a second voltage, a third voltage, and a fourth voltage, respectively. The first voltage, the second voltage, the third voltage, and the fourth voltage are respectively converted into a first digital signal, a second digital signal, a third digital signal, and a fourth digital signal; The output value of X is determined based on the first digital signal and the second digital signal; The Y output value is determined based on the third digital signal; and The Z output value is determined based on the fourth digital signal; The steps for determining the X output value, the Y output value, and the Z output value include: Multiply the first digital signal by a first calibration coefficient to generate a first sub-output value; Multiply the second digital signal by a second calibration coefficient to generate a second sub-output value; The first sub-output value is added to the second sub-output value to generate the X output value; The third digital signal is multiplied by a third calibration coefficient to produce the Y output value; and The fourth digital signal is multiplied by a fourth calibration coefficient to produce the Z output value.

12. The optical sensing method as described in claim 11, characterized in that, It also includes generating a color temperature value based on the X output value, the Y output value, and the Z output value.

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