CN219142015U

CN219142015U - Optical sensing device

Info

Publication number: CN219142015U
Application number: CN202223072032.1U
Authority: CN
Inventors: 孙伯伟; 陈经纬; 胡耀升
Original assignee: Egis Technology Inc
Current assignee: Egis Technology Inc
Priority date: 2022-05-30
Filing date: 2022-11-18
Publication date: 2023-06-06
Anticipated expiration: 2032-11-18
Also published as: TW202347806A; TWM641708U; CN116007748A; CN116400370A; TWM640855U; WO2023231315A1; WO2023231314A1; CN219016582U; TW202346892A

Abstract

The utility model provides an optical sensing device. Providing a breakdown bias voltage to the photo-sensing diode. The number of times of breakdown of the photo-sensing diode is counted according to a photo-sensing signal generated by sensing ambient light by the photo-sensing diode when the photo-sensing diode receives the breakdown bias voltage during the photo-sensing period. The count value is sampled to generate a plurality of sampled values. And judging the light characteristic of the ambient light according to the sampling value.

Description

Optical sensing device

Technical Field

The present utility model relates to a sensing device, and more particularly, to an optical sensing device.

Background

Integrated Chips (ICs) with photonic devices exist in many modern electronic devices. For example, photonic devices including image sensors are used in cameras, video recorders and other types of photographic systems to capture images. Generally, the photo-sensing chip converts current to voltage by integrating photocurrent, and then decodes the current by using an analog-to-digital converter. The adc has the disadvantages of complex design and power consumption, and in the case of weak ambient light, a high-precision adc circuit is required to perform noise control or increase the number of photo-sensing diodes to increase the sensing sensitivity, which increases the circuit area and the cost. In addition, the signal processing is performed by integrating the photocurrent, so that a sufficient integration time is required to avoid too low a signal-to-noise ratio, which would limit the data reporting rate (report rate) significantly.

Disclosure of Invention

The utility model provides an optical sensing device, which can accurately judge the light characteristic of ambient light under the condition of weak ambient light without increasing the circuit area, the cost and the power consumption, provides good sensing quality and data return rate, and can achieve the same sensing sensitivity with smaller circuit area compared with the traditional light sensing diode.

The optical sensing device comprises a bias voltage generating circuit, at least one light sensing diode, a quenching circuit, a counter circuit and a signal processing circuit. The bias voltage generating circuit provides a breakdown bias voltage or a standard bias voltage. The cathode terminal of the photo-sensing diode is coupled with the bias voltage generating circuit and senses ambient light to generate a photo-sensing signal. The quenching circuit is coupled with the anode end of the light sensing diode and quenches the light sensing diode. The counter circuit is coupled to the anode terminal of the photo-sensing diode, and counts the number of times of breakdown of the photo-sensing diode according to a photo-sensing signal generated by the photo-sensing diode when receiving the breakdown bias voltage during the photo-sensing period. The signal processing circuit is coupled to the counter circuit, samples the count value to generate a plurality of sampled values, and determines the light characteristic of the ambient light according to the sampled values.

Based on the above, the photo-sensing diode of the embodiment of the utility model can receive the breakdown bias voltage and sense the ambient light to generate the photo-sensing signal, the counter circuit can count the number of times of breakdown of the photo-sensing diode according to the photo-sensing signal to generate the count value, and the signal processing circuit can sample the count value to generate a plurality of sampling values and determine the light characteristic of the ambient light according to the plurality of sampling values. The light intensity sensed by the light sensing diode is calculated by utilizing the count value of the counter circuit, so that an integrator circuit is avoided, the light characteristic of the ambient light can be accurately judged under the condition of weak ambient light without increasing the circuit area, the cost and the power consumption, good sensing quality and data return rate are provided, and compared with the traditional light sensing diode, the light intensity sensed by the light sensing diode can be calculated by utilizing the counter circuit, and the same sensing sensitivity can be achieved by smaller circuit area.

In order to make the above features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

FIG. 1 is a schematic diagram of an optical sensing device according to an embodiment of the utility model.

Fig. 2 is a waveform diagram of a photo sensing signal according to an embodiment of the present utility model.

Fig. 3 is a waveform diagram of a count value according to an embodiment of the present utility model.

FIG. 4 is a schematic diagram of an optical sensing device according to another embodiment of the utility model.

FIG. 5 is a schematic diagram of an optical sensing device according to another embodiment of the utility model.

FIG. 6 is a schematic diagram of an optical sensing device according to another embodiment of the utility model.

Fig. 7 is a flowchart of a sensing method of an optical sensing device according to an embodiment of the utility model.

FIG. 8 is a flow chart of a sensing method of an optical sensing device according to another embodiment of the utility model.

Detailed Description

In order that the utility model may be more readily understood, the following examples are provided as illustrations of the true practice of the utility model. In addition, wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.

Referring to fig. 1, fig. 1 is a schematic diagram of an optical sensing device according to an embodiment of the utility model. The optical sensing device may include a bias voltage generating circuit 102, a photo sensing diode PD1 (e.g., a single photon breakdown diode Single Photon Avalanche Diode, SPAD), a quenching (sequencing) circuit 104, a counter circuit 106, and a signal processing circuit 108, wherein the bias voltage generating circuit 102 is coupled to a cathode terminal of the photo sensing diode PD1, and the quenching circuit 104 is coupled to an anode terminal of the photo sensing diode PD 1. The bias voltage generating circuit 102 may be configured to provide a breakdown bias voltage or a standard bias voltage to the photo-sensing diode PD1, so that the photo-sensing diode PD1 is in an extremely reverse biased or reverse biased state. When photons of the ambient light L1 are injected into the depletion layer of the photo-sensing diode PD1, the photo-sensing diode PD1 is triggered to generate a breakdown (avalanche) current to provide the photo-sensing signal S1 under the extremely reverse bias state of the photo-sensing diode PD 1. In addition, the quenching circuit 104 may quench the photo-sensing diode PD1 after the photo-sensing diode PD1 provides the photo-sensing signal S1 to restore the anode terminal voltage of the photo-sensing diode PD1 to the voltage before the photo-sensing signal S1 is provided, and the quenching circuit 104 is not limited by the present utility model. It should be noted that although only one photo-sensing unit formed by the photo-sensing diode PD1 and the quenching circuit 104 is shown in the embodiment of fig. 1, the photo-sensing device may include more photo-sensing units, such as an array of photo-sensing units formed by a plurality of photo-sensing units and the counter circuit 106.

The counter circuit 106 may count the number of times the photo-sensing diode PD1 breaks down according to the photo-sensing signal S1 generated by the photo-sensing diode PD1 during the period of receiving the breakdown bias voltage, and generate a count value C1 to the signal processing circuit 108, and the signal processing circuit 108 may determine the light intensity sensed by the photo-sensing diode PD1 according to the count value C1. For example, as shown in fig. 2, the signal processing circuit 108 can determine the light intensity sensed by the photo diode PD1 during the photo sensing period T1 according to the count value C1 obtained by the counter circuit 106 counting the pulse number of the photo sensing signal S1 during the photo sensing period T1 (i.e. the number of times the photo diode PD1 breaks down during the photo sensing period T1), wherein a larger count value C1 represents a stronger light intensity sensed by the photo diode PD1 during the photo sensing period T1. The photo-sensing period T1 may be, for example, a period in which the photo-sensing diode PD1 receives the breakdown bias voltage, but not limited thereto, and may be set to other periods according to the user's requirement, for example, a period in which the photo-sensing diode PD1 receives the ambient light L1 or a period in which the counter circuit 106 performs counting. For example, in some embodiments, the counter circuit 106 may periodically re-count the number of pulses of the light sensing signal S1, for example, the number of pulses of the light sensing signal S1 is re-counted every light sensing period T1, so that in case that the intensity of the ambient light L1 has a specific frequency, the counter circuit 106 generates a count value change with a specific frequency as shown in fig. 3.

As shown in fig. 3, the signal processing circuit 108 may sample the count value generated by the counter circuit 106 to generate a plurality of sample values, for example, according to the count value generated by the counter circuit 106 at a predetermined sampling frequency. It should be noted that the sampling frequency of the signal processing circuit 108 is not limited to fig. 3, and the signal processing circuit 108 may sample the count value with a higher or lower predetermined sampling frequency, and the sampling time may be, for example, 2N times the inverse of the sampling frequency, where N is a positive integer, but not limited thereto. The signal processing circuit 108 can determine the light characteristic of the ambient light L1 according to the sampled value. The signal processing circuit 108 may determine the frequency of the ambient light L1 according to the amplitude of the sampled value. In some embodiments, the signal processing circuit 108 may also perform a spectrum analysis on the sampled values, such as performing a Fast Fourier Transform (FFT) on the sampled values to obtain the harmonic distribution of the light sensing signal S1. In addition, the signal processing circuit 108 may determine whether there is a flicker phenomenon according to the amplitude of the harmonic in the frequency domain, for example, when the amplitude of the harmonic in the frequency domain is higher than a predetermined threshold, the ambient light L1 is shown to flicker at the frequency, for example, when the amplitude of the harmonic in the frequency domain at 100Hz is higher than the predetermined threshold, the flicker rate of the ambient light L1 is shown to be 100Hz. In some embodiments, the signal processing circuit 108 may also calculate the average value of the sampled values, then subtract the average value from the sampled values to remove the dc component of the sampled values, and then perform a fast fourier transform on the sampled values from which the dc component was removed.

Therefore, by biasing the photo-sensing diode PD1 to an extremely reverse bias state and utilizing the count value generated by the counter circuit to count the breakdown times of the photo-sensing diode to determine the light characteristic of the ambient light, the resistance of the optical sensing device to noise can be improved, the light characteristic of the ambient light can still be accurately determined under the condition of weak ambient light, so that the optical sensing device has good sensing quality and data reporting rate, and in addition, an integrator and an analog-digital converter are not required to be arranged, the circuit area can be further reduced, the power consumption can be reduced, the production cost can be reduced, and compared with the traditional photo-sensing diode, the smaller circuit area can achieve the same sensing sensitivity.

In addition, in some embodiments, the signal processing circuit 108 may further compensate the count value according to an error compensation value, and correct the count value provided by the counter circuit 106, where the error compensation value may include at least one of a count value corresponding to a dark current of the photo-sensing diode PD1 or a count value corresponding to crosstalk interference between adjacent photo-sensing diodes. The signal processing circuit 108 may, for example, subtract the error compensation value from the count value C1 to obtain a count value corresponding to the ambient light L1 more accurately, thereby further improving the sensing quality of the optical sensing device.

FIG. 4 is a schematic diagram of an optical sensing device according to another embodiment of the utility model. In this embodiment, the optical sensing device further includes a filter layer F1, and the filter layer F1 may be, for example, a color filter, such as a green, red or blue color filter, but not limited thereto. The filter layer F1 can perform band-pass filtering on the ambient light L1, so that the count value provided by the counter circuit 106 represents the light characteristic of the ambient light L1 within the bandwidth range of the corresponding color filter. For example, but not limited to, the light intensity and the flicker rate of the ambient light L1 within the bandwidth range of the color filter. The signal processing circuit 108 can sample the count value generated by the counter circuit 106 according to a predetermined sampling frequency to generate a corresponding sampling value, and determine the light intensity of the ambient light L1 within the bandwidth range of the filter layer F1 according to the sampling value of the photo-sensing diode PD 1. For example, when the filter layer F1 is a red filter, the signal processing circuit 108 can determine the light intensity of the ambient light L1 in the red wavelength range according to the sampling value.

It should be noted that, in other embodiments, the optical sensing device may also include a plurality of different filter layers, as shown in fig. 5, the optical sensing device may include a plurality of filter layers F1-F3, and the filter layers F1-F3 may have different bandwidth ranges, for example, but not limited to, implemented with green, red and blue color filters, respectively. The filter layers F1 to F3 correspond to the different photo-sensing cell arrays AR1 to AR3, and can band-pass filter the ambient light L1 irradiated to the photo-sensing cell arrays AR1 to AR3, respectively. The photo-sensing diodes PD1 of the photo-sensing unit arrays AR1 to AR3 can receive the ambient light L1 through the corresponding filter layers F1 to F3, respectively, and the counter circuits 106 of the photo-sensing unit arrays AR1 to AR3 can count the number of times of breakdown of the photo-sensing diodes PD1 coupled thereto to generate corresponding count values.

The signal processing circuit 108 can sample the count values of the photo-sensing diodes PD1 of the photo-sensing unit arrays AR1 to AR3 according to a predetermined sampling frequency to generate corresponding sampling values. Since the different sensing unit arrays AR1 to AR3 correspond to the different filter layers F1 to F3, the count values generated by the counter circuits 106 of the different sensing unit arrays AR1 to AR3 may represent the light intensities of the ambient light L1 within different bandwidths, and the signal processing circuit 108 may determine the color temperature of the ambient light L1 according to the sampled value obtained by sampling the count values, and further determine the light source type and illuminance of the ambient light L1, such as LEDs, incandescent lamps, sunlight …, and so on. For example, assuming that the filter layers F1 to F3 are respectively green, red and blue color filters, the signal processing circuit 108 can determine the light intensities of the ambient light L1 in the green wavelength range, the red wavelength range and the blue wavelength range according to the sampling values, so as to obtain the wavelength distribution of the ambient light L1, and further determine the color temperature, the light source type and the illuminance of the ambient light L1. In some embodiments, the count values of the corresponding sensing unit arrays AR1 to AR3 may be subtracted by the corresponding error compensation values, for example, the count values of the dark currents and the count values of the crosstalk interference of the corresponding sensing unit arrays AR1 to AR3, respectively, so as to obtain the count value of the corresponding ambient light L1 more accurately, thereby further improving the sensing quality of the optical sensing device.

It should be noted that, in some embodiments, the filter layers F1-F3 may cover only a portion of the sensing unit arrays AR 1-AR 3, so that a portion of the photo-sensing diodes PD1 in the sensing unit arrays AR 1-AR 3 receive the ambient light L1 through the filter layers F1-F3, and a portion of the photo-sensing diodes PD1 directly receive the ambient light L1, for example, but not limited to, a portion of the photo-sensing diodes PD1 in the sensing unit arrays AR 1-AR 3 respectively directly receive the ambient light L1, and for example, a portion of the photo-sensing diodes PD1 in one of the sensing unit arrays AR 1-AR 3 may directly receive the ambient light L1. In this way, the signal processing circuit 108 can determine the light intensity of the ambient light L1 within the bandwidth range of the filter layers F1 to F3 according to the sampled value obtained by sampling the count value, and determine the color temperature according to the light intensity of the ambient light L1 within the bandwidth range of the filter layers F1 to F3, and further determine the light intensity of the ambient light L1 according to the count value of the photo-sensing diode PD1 corresponding to the directly received ambient light L1.

FIG. 6 is a schematic diagram of an optical sensing device according to another embodiment of the utility model. In this embodiment, the optical sensing device further includes a switch SW1, a switching circuit 602 and a readout circuit 604, wherein the switch SW1 is coupled between the anode terminal of the photo sensing diode PD1 and the quenching circuit 104, the switching circuit 602 is coupled between the anode terminal of the photo sensing diode PD1, the counter circuit 106 and the readout circuit 604, and the readout circuit 604 is further coupled to the signal processing circuit 108. The readout circuit 604 may be implemented, for example, with switches SW2 and SW3, the switch SW2 being coupled between the anode terminal of the photo-sensing diode PD1 and the counter circuit 106, and the switch SW3 being coupled between the anode terminal of the photo-sensing diode PD1 and the readout circuit 604.

The signal processing circuit 108 can control the on states of the switches SW1 to SW3 according to the sensing mode of the optical sensing device. For example, when the optical sensing device is in the weak ambient light sensing mode, the control bias voltage generating circuit 102 provides the breakdown bias voltage to the photo sensing diode PD1, the control switch SW1 is turned on and the control switching circuit 502 switches the anode terminal of the photo sensing diode PD to be connected to the counter circuit 106 (i.e. the control switch SW2 is turned on and the control switch SW3 is turned off), so that the optical sensing device can accurately determine the light characteristic of the ambient light L1 in the low light environment, and good sensing quality is maintained. When the optical sensing device is in the normal sensing mode, the signal processing circuit 108 can control the bias voltage generating circuit 102 to provide the standard bias voltage, control the switch SW1 to be turned off and control the switching circuit 502 to switch the anode terminal of the photo-sensing diode PD1 to be connected to the readout circuit 504 (i.e. control the switch SW2 to be turned off and control the switch SW3 to be turned on), so that the optical sensing device is suitable for sensing the ambient light L1 in a higher illumination environment.

The normal bias voltage is smaller than the breakdown bias voltage, and the normal bias voltage can make the photo-sensing diode PD1 enter the reverse bias state but not enter the extremely reverse bias state, that is, the photo-sensing diode PD1 does not have the characteristic of a single photon avalanche diode at this time. The readout circuit 504 may include, for example, an integrator that performs an integration operation on the photo sensing signal provided by the photo sensing diode PD1 to generate an integrated signal, and an analog-to-digital converter that converts the integrated signal into a digital signal to generate a sensing value SD1 for the signal processing circuit 108. In this way, the photo-sensing diode PD1 is switched to the counter circuit 106 or the readout circuit 504 under different illumination environments, so that the light intensity application range of the optical sensing device for photo-sensing can be enlarged, and the convenience of use of the optical sensing device can be improved.

Fig. 7 is a flowchart of a sensing method of an optical sensing device according to an embodiment of the utility model. As can be seen from the above embodiments, the sensing method of the optical sensing device may at least include the following steps. First, a breakdown bias voltage is provided to the photo-sensing diode (step S702). Then, the photo sensing signal generated according to the ambient light sensed by the photo sensing diode counts the number of breakdown times of the photo sensing diode during the photo sensing period to generate a count value (step S704). Then, the count value is sampled to generate a plurality of sampling values (step S706), for example, the count value is sampled according to a predetermined sampling frequency to generate a plurality of sampling values. Then, the light characteristic of the ambient light is determined according to the sampled values (step S708), for example, spectrum analysis may be performed on the sampled values to obtain harmonic distribution of the light sensing signal, or whether a flicker phenomenon with a specific frequency occurs may be determined according to whether the vibration of the harmonic is greater than a preset threshold.

FIG. 8 is a flow chart of a sensing method of an optical sensing device according to another embodiment of the utility model. In this embodiment, the optical sensing device may include at least one filter layer, the filter layer may perform band-pass filtering on the ambient light, the light sensing diode receives the ambient light through the corresponding filter layer, and the filter layer may be, for example, a color filter. After step S702, a count value is generated by counting the number of breakdown times of the photo-sensing diode according to the photo-sensing signal generated by the photo-sensing diode sensing the ambient light through the filter layer (step S802). In some embodiments, the different light sensing diodes may also receive the ambient light via the filter layer having different frequency bands, or alternatively, some of the light sensing diodes may receive the ambient light through the filter layer and some of the light sensing diodes may directly receive the ambient light. In addition, in the present embodiment, the count value may be further compensated according to the error compensation value (step S804), for example, the count value is subtracted by the error compensation value to compensate the count value. The error compensation value may include at least one of a count value corresponding to a dark current of the photo-sensing diode or a count value corresponding to crosstalk interference between adjacent photo-sensing diodes, but is not limited thereto. The count value corresponding to the ambient light L1 can be obtained more accurately by compensating the count value through the error compensation value, so that the sensing quality of the optical sensing device is improved.

In step S708, since the light sensing diode of the present embodiment receives the ambient light through the filter layer, the light characteristic of the ambient light within the bandwidth range can be determined according to the sampling value. Such as, but not limited to, the light intensity and the flicker rate of the ambient light within the bandwidth of the color filter. Under the condition that different light sensing diodes receive the ambient light through the filter layers with different frequency bands, the light intensity of the ambient light in the bandwidth range of each filter layer can be judged according to the sampling value obtained by sampling the count value, the color temperature of the ambient light can be judged according to the light intensity of the ambient light in the bandwidth range of each filter layer, and the type of the light source and the illumination for providing the ambient light can be further judged. In addition, under the condition that a part of the light sensing diodes receive the ambient light through the filter layers and a part of the light sensing diodes directly receive the ambient light, the light intensity of the ambient light in the bandwidth range of each filter layer can be judged according to the sampling value of the light sensing diodes corresponding to the ambient light received through the filter layers, the color temperature of the ambient light can be judged according to the light intensity of the ambient light in the bandwidth range of each filter layer, and the light intensity of the ambient light can also be judged according to the sampling value of the light sensing diodes corresponding to the ambient light received directly.

In summary, the photo-sensing diode of the embodiment of the utility model can receive the breakdown bias voltage and sense the ambient light to generate the photo-sensing signal, the counter circuit can count the number of times of breakdown of the photo-sensing diode according to the photo-sensing signal to generate the count value, the signal processing circuit can sample the count value to generate a plurality of sampling values, and the light characteristic of the ambient light is determined according to the plurality of sampling values. The light intensity sensed by the light sensing diode is calculated by utilizing the count value of the counter circuit, so that an integrator circuit is avoided, the light characteristic of the ambient light can be accurately judged under the condition of weak ambient light without increasing the circuit area, the cost and the power consumption, good sensing quality and data return rate are provided, and compared with the traditional light sensing diode, the light intensity sensed by the light sensing diode can be calculated by utilizing the counter circuit, and the same sensing sensitivity can be achieved by smaller circuit area.

Although the utility model has been described with reference to the above embodiments, it should be understood that the utility model is not limited thereto, but rather may be modified or altered somewhat by persons skilled in the art without departing from the spirit and scope of the utility model.

Claims

1. An optical sensing device, comprising:

a bias voltage generating circuit for providing a breakdown bias voltage or a standard bias voltage;

at least one photo-sensing diode, the cathode end of which is coupled with the bias voltage generating circuit, senses ambient light and generates a photo-sensing signal;

the quenching circuit is coupled with the anode end of the light sensing diode and used for quenching the light sensing diode;

the counter circuit is coupled with the anode end of the light sensing diode and is used for counting the breakdown times of the light sensing diode according to the light sensing signal generated by the light sensing diode when receiving the breakdown bias voltage during the light sensing period to generate a count value; and

the signal processing circuit is coupled with the counter circuit, samples the count value to generate a plurality of sampling values, and judges the light characteristic of the ambient light according to the plurality of sampling values.

2. The optical sensing device of claim 1, wherein the signal processing circuit performs a spectral analysis on the plurality of sample values to obtain a harmonic distribution of the optical sensing signal.

3. The optical sensing device according to claim 2, wherein the signal processing circuit determines whether a flicker phenomenon occurs according to whether a vibration of a harmonic is greater than a predetermined threshold.

4. The optical sensing device of claim 1, further comprising:

and the light sensing diode receives the ambient light through the corresponding filter layer.

5. The optical sensing device of claim 1, further comprising:

the light sensing diode receives the ambient light through the light filtering layer, the counter circuit counts the breakdown times of the light sensing diode to generate a corresponding count value, the signal processing circuit samples the count value of the light sensing diode to generate a plurality of sampling values, and the light intensity of the ambient light within the bandwidth range of the light filtering layer is judged according to the plurality of sampling values of the light sensing diode.

6. The optical sensing device according to claim 1, wherein the optical sensing device comprises a plurality of light sensing diodes and a plurality of filter layers, the plurality of filter layers have different frequency bands, the plurality of light sensing diodes receive the ambient light through the corresponding filter layers, the counter circuit counts the number of times of breakdown of each light sensing diode to generate corresponding count values, the signal processing circuit samples the count values of each light sensing diode to generate corresponding sample values, judges the light intensity of the ambient light within the bandwidth range of each filter layer according to the sample values of the plurality of light sensing diodes, and judges the color temperature of the ambient light according to the light intensity of the ambient light within the bandwidth range of each filter layer.

7. The optical sensing device of claim 6, wherein the signal processing circuit determines the type of light source of the ambient light based on a color temperature of the ambient light.

8. The optical sensing device according to claim 1, wherein the optical sensing device comprises a plurality of light sensing diodes and a plurality of filter layers, the plurality of filter layers have different frequency bands, the ambient light is band-pass filtered, a part of the plurality of light sensing diodes respectively receive the ambient light through the corresponding filter layers, the counter circuit respectively counts the collapse times of the light sensing diodes to generate corresponding count values, the signal processing circuit samples the count values of the light sensing diodes to generate corresponding sample values, the light intensity of the ambient light and the light intensity of the ambient light in the bandwidth range of the filter layers are judged according to the sample values of the plurality of light sensing diodes, and the color temperature of the ambient light is judged according to the light intensity of the ambient light in the bandwidth range of the filter layers.

9. The optical sensing device of claim 1, wherein the signal processing circuit further compensates the count value according to an error compensation value.

10. The optical sensing device according to claim 9, wherein the error compensation value includes at least one of a count value corresponding to dark current of the photo-sensing diode or a count value corresponding to crosstalk interference between adjacent photo-sensing diodes.

11. The optical sensing device according to claim 1, wherein the signal processing circuit samples the count value according to a predetermined sampling frequency to generate the plurality of sampling values.

12. The optical sensing device of claim 1, further comprising:

the switch is coupled between the anode end of the light sensing diode and the quenching circuit;

the switching circuit is coupled between the anode end of the light sensing diode and the counter circuit; and

the readout circuit is coupled between the switching circuit and the signal processing circuit, and performs an integration operation on the photo-sensing signal to generate a sensing value for the signal processing circuit, and when the optical sensing device is in a weak ambient light sensing mode, the signal processing circuit controls the bias voltage generating circuit to provide the breakdown bias voltage to the cathode end of the photo-sensing diode, controls the switch to be turned on and controls the switching circuit to switch and connect the anode end of the photo-sensing diode to the counter circuit, and when the optical sensing device is in a normal sensing mode, controls the bias voltage generating circuit to provide the standard bias voltage to the cathode end of the photo-sensing diode, and controls the switch to be turned off and controls the switching circuit to switch and connect the anode end of the photo-sensing diode to the readout circuit, wherein the standard bias voltage is smaller than the breakdown bias voltage.