Optical sensor, terminal device, and sensing method

Abstract

The invention provides an optical sensor, a terminal device and a sensing method. The light sensor comprises a first light sensing unit and a second light sensing unit. The second optical sensing unit is provided with an optical element which is arranged in a sensing area of the second optical sensing unit. The first light sensing unit has a first light wavelength passing range, and the first light wavelength passing range comprises a visible light wave band and an infrared light wave band. The optical element has a second light wavelength passing range, and the second light wavelength passing range includes a first portion of the visible light band and the infrared light band. The second light wavelength pass range corresponds to a progressive pass interval in a first portion of the visible light band. According to the optical sensor, the terminal device and the sensing method, the optical sensing function capable of reflecting the real light sensing feeling of human eyes can be realized.

Description

Technical Field

[0001] The present invention relates to a sensing technology, and in particular to a light sensor, a terminal device and a sensing method. Background Art

[0002] Traditional ambient light sensors use light sensors to sense the surrounding light, and hope that the sensed ambient light is consistent with the perception of the human eye, thereby obtaining a sensing result that can actually reflect the real light perception of the human eye. However, the current means of enabling light sensors to produce sensing results that reflect the real light perception of the human eye may require complex optical structures and material designs or high-cost methods, making it difficult to popularize in various application products. Therefore, how to achieve relatively simple means and achieve it in a low-cost way is an important issue in this field. Summary of the invention

[0003] The present invention provides a light sensor, a terminal device and a sensing method, which can realize a light sensing function that can respond to the real light perception of human eyes.

[0004] The optical sensor of the present invention includes a first optical sensing unit and a second optical sensing unit. The second optical sensing unit has an optical element, which is arranged in the sensing area of ​​the second optical sensing unit. The first optical sensing unit has a first light wavelength passing range, and the first light wavelength passing range includes a visible light band and an infrared light band (successive to the visible light band). The optical element has a second light wavelength passing range, and the second light wavelength passing range includes a first part of the visible light band and an infrared light band (successive to the first part of the visible light band). The second light wavelength passing range corresponds to a progressive passing interval in the first part of the visible light band.

[0005] The terminal device of the present invention includes a reaction unit, a first light sensing unit, a second light sensing unit and a processing unit. The second light sensing unit has an optical element arranged in a sensing area of ​​the second light sensing unit. The processing unit couples the reaction unit, the first light sensing unit and the second light sensing unit. The first light sensing unit has a first light wavelength passing range, and the first light wavelength passing range includes a visible light band and an infrared light band. The optical element has a second light wavelength passing range, and the second light wavelength passing range includes a first part of the visible light band and an infrared light band. The second light wavelength passing range corresponds to a progressive passing interval in the first part of the visible light band.

[0006] The sensing method of the present invention comprises the following steps: performing light sensing through a first light sensing unit to generate a first sensing signal; performing light sensing through a second light sensing unit having an optical element to generate a second sensing signal, wherein the optical element is arranged in a sensing area of ​​the second light sensing unit; and generating a light intensity sensing value according to the first sensing signal and the second sensing signal. The first light sensing unit has a first light wavelength passing range, and the first light wavelength passing range includes a visible light band and an infrared light band. The optical element has a second light wavelength passing range, and the second light wavelength passing range includes a first part of the visible light band and an infrared light band. The second light wavelength passing range corresponds to a progressive passing interval in the first part of the visible light band.

[0007] Based on the above, the optical sensor, terminal device and sensing method of the present invention can perform sensing through the first optical sensing unit and the second optical sensing unit having different light wavelength passing ranges. Since the first optical sensing unit and the second optical sensing unit of the present invention can have matching light wavelength responses in the infrared band, the subtraction of the sensing results of the first optical sensing unit and the second optical sensing unit can effectively offset the influence of the infrared band. In addition, since the first optical sensing unit and the second optical sensing unit of the present invention can have different light wavelength responses in the visible light band, the subtraction of the sensing results of the first optical sensing unit and the second optical sensing unit can obtain a spectral response change that is consistent with or close to human vision.

[0008] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a side schematic diagram of an optical sensor according to an embodiment of the present invention;

[0010] Figure 2 is a schematic diagram of a sensor unit array according to an embodiment of the present invention;

[0011] Figure 3 is a schematic diagram of an optical sensor according to an embodiment of the present invention;

[0012] Figure 4 is a flow chart of a sensing method according to an embodiment of the present invention;

[0013] Figure 5 is a schematic diagram of the photosensitive response characteristics of the first light sensing unit and the second light sensing unit according to an embodiment of the present invention;

[0014] Figure 6 is a schematic diagram of light intensity sensing values ​​and photosensitivity response characteristics of human vision results according to an embodiment of the present invention;

[0015] Figure 7 is a schematic diagram of a terminal device according to an embodiment of the present invention.

[0016] Description of Reference Numerals

[0017] 100, 300, 720: light sensor;

[0018] 101:Substrate;

[0019] 110: optical sensing element;

[0020] 120: sensing area;

[0021] 130: transparent adhesive material;

[0022] 311, 721: first light sensing unit;

[0023] 312, 722: second light sensing unit;

[0024] 3121, 7221: optical element;

[0025] 340, 740: processing unit;

[0026] 510: first spectral response curve;

[0027] 520: second spectral response curve;

[0028] 610: human eye light sensitivity response curve;

[0029] 620: difference curve;

[0030] 700: terminal device;

[0031] 760: reaction unit;

[0032] S410~S430: steps;

[0033] R0, R4, R60, R61: optical wavelength range;

[0034] R1: first light wavelength passing range;

[0035] R2: second light wavelength passing range;

[0036] R3: Progressive passing zone;

[0037] P(1,1)~P(N,M): light sensing unit. DETAILED DESCRIPTION

[0038] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0039] In order to make the content of the present invention more understandable, the following embodiments are specifically cited as examples that the present disclosure can be implemented. In addition, wherever possible, the elements / components / steps with the same reference numerals in the drawings and embodiments represent the same or similar parts.

[0040] The terms "first", "second" and similar terms mentioned throughout the entire specification of the present invention (including the scope of the patent application) are only used to name discrete elements or distinguish different embodiments or scopes. Therefore, the terms should not be regarded as limiting the upper or lower limit of the number of elements, and should not be used to limit the arrangement order of elements. In addition, the size ratio and configuration position of each element of the present invention are not limited to those shown in the drawings.

[0041] Figure 1 FIG. 1 is a side view of a light sensor according to an embodiment of the present invention. Figure 1 , the optical sensor 100 includes a substrate 101, an optical sensing element 110 and a sensing area 120. The optical sensing element 110 is formed on the substrate 101. In this embodiment, the substrate 101 can be a printed circuit board (PCB) or a flexible printed circuit board (FPCB). The optical sensing element 110 can be transmitted through a plurality of optical sensing units ( Figure 1 Not shown, will be Figure 2 Detailed description) receives the sensing light. In the present embodiment, the light sensing element 110 may be a sensor chip, and the plurality of light sensing units formed on the sensor chip may be sensing pixels. The light sensor 100 may further include a transparent adhesive 130. The transparent adhesive 130 may be, for example, epoxy resin or other transparent polymers, and may be used to fix and protect the light sensing element 110. In the present embodiment, the light sensor 100 may be an ambient light sensor for sensing ambient light outside the light sensor 100, but the present invention is not limited thereto.

[0042] Figure 2 FIG. 1 is a schematic diagram of a sensor unit array according to an embodiment of the present invention. Figure 1 as well as Figure 2 In this embodiment, the sensing region 120 of the light sensing element 110 may include: Figure 2The plurality of light sensing units P(1,1) to P(N,M) shown in the figure, wherein N and M are positive integers respectively. The light sensing units P(1,1) to P(N,M) may form a sensing pixel array on the light sensing element 110. In the present embodiment, the sensing pixel array may include a plurality of first light sensing units and a plurality of second light sensing units. In other words, at least a portion of the light sensing units P(1,1) to P(N,M) are first light sensing units, and at least another portion are second light sensing units. Figure 2 As shown, the light sensing units P(1,1) and P(2,2) may be, for example, first light sensing units (such as Figure 2 ), and the light sensing units P(1,2) and P(2,1) may be, for example, second light sensing units (such as Figure 2 ). Similarly, the multiple first light sensing units and the multiple second light sensing units in the sensing pixel array may be arranged alternately, but the present invention is not limited thereto. In one embodiment, the multiple first light sensing units and the multiple second light sensing units of the light sensing units P(1,1) to P(N,M) may be arranged in other ways to form a sensing pixel array, for example, one area in the sensing pixel array is all first light sensing units and another area is all second light sensing units. In addition, in one embodiment, the number of the multiple first light sensing units and the multiple second light sensing units may be the same, but the present invention is not limited thereto. Furthermore, in one embodiment, the light sensing unit 110 may further include one or more signal converters (for example, an analog to digital converter (ADC), and may be used to convert the signals sensed by the first light sensing unit and the second light sensing unit into digital signals.

[0043] Figure 3 FIG. 1 is a schematic diagram of a light sensor according to an embodiment of the present invention. Figure 3 The following embodiment will be described in detail with a first light sensing unit and a second light sensing unit of the light sensor. In this embodiment, the light sensor 300 may include a light sensing element (such as Figure 1110) and may further include a processing unit 340. In the present embodiment, the processing unit 340 is coupled to the first light sensing unit 311 and the second light sensing unit 312. The processing unit 340 may be, for example, a microcontroller unit (MCU), a microprocessor (Microprocessor), a digital signal processor (DSP), a programmable controller, an application specific integrated circuit (ASIC), a programmable logic device (PLD), other similar processing devices or a combination of these devices.

[0044] In this embodiment, the first light sensing unit 311, the second light sensing unit 312 and the processing unit 340 may be formed on the same light sensing element (eg Figure 1 In one embodiment, the first light sensing unit 311 and the second light sensing unit 312 may be formed on the light sensing unit, and the light sensing unit and the processing unit 340 are disposed on the same substrate (eg, Figure 1 In addition, the processing unit 340 can also be externally mounted on the optical sensor 300, and the optical sensor 300 and the processing unit 340 can be electrically connected by bonding or wiring.

[0045] In the present embodiment, the second light sensing unit 312 may also have an optical element 3121, wherein the optical element 3121 is disposed in the second light sensing unit 312, and the optical element 3121 may be an optical coating or a light absorbing material. In the present embodiment, the optical element 3121 may be an element formed by stacking one or more filter layers, and is disposed or coated on the sensing area (e.g., above the sensing area) of the second light sensing unit 312, such as a filter or filter coating based on the passage of infrared light and designed to adjust the light wave cutoff range to allow a portion of visible light to pass through, but the present invention is not limited thereto. In one embodiment, the optical element 3121 may also be an internal element of the second light sensing unit 312, such as a material or component combination that allows a specific light band to penetrate or absorb.

[0046] In the present embodiment, the first light sensing unit 311 and the second light sensing unit 312 may be, for example, photodiodes, respectively. Furthermore, if the optical element 3121 is not provided, the second light sensing unit 312 may have the same or similar spectral response as the first light sensing unit 311. In the present embodiment, the first light sensing unit 311 may have a first light wavelength passing range, and the first light wavelength passing range includes a visible light band and an infrared light band following the visible light band, that is, the first light sensing unit 311 may be used to sense light bands with wavelengths above about 400 nanometers. The spectral response of the first light sensing unit 311 in the first light wavelength passing range generally increases from short wavelengths to long wavelengths. Furthermore, in one embodiment, when the optical element 3121 is the above-mentioned filter, the original spectral response curve of the second light sensing unit 312 directly performing light sensing without passing through the optical element 3121 matches the first spectral response curve corresponding to the first light sensing unit 311. In other words, the same silicon photodiode as the first light sensing unit 311 can be used and the optical element 3121 can be set to serve as the second light sensing unit 312 of this embodiment. In addition, in this embodiment, the optical element 3121 has a second light wavelength passing range, and the second light wavelength passing range includes the first part of the visible light band and the infrared light band. In other words, the second light sensing unit 312 including the optical element 3121 also has a second light wavelength passing range. The second light wavelength passing range corresponds to the progressive passing interval in the first part of the visible light band.

[0047] Figure 4 is a flow chart of a sensing method according to an embodiment of the present invention. Figure 3 to Figure 4, the light sensor 300 may perform the following steps S410 to S430. In step S410, the light sensor 300 may perform light sensing of the outside world through the first light sensing unit 311, and convert the received light signal into an electrical signal to generate a first sensing signal. In step S420, the light sensor 300 may perform light sensing through the second light sensing unit 312 having an optical element 3121, and convert the light signal into an electrical signal to generate a second sensing signal. The first sensing signal and the second sensing signal may be digital signals. The processing unit 340 may receive the first sensing signal and the second sensing signal. In step S430, the processing unit 340 may generate a light intensity sensing value based on the first sensing signal and the second sensing signal. The light intensity sensing value obtained in step S430 is a result of approximating the human eye's perception of the brightness of the external light. It should be noted that in this embodiment, the execution order of step S410 and step S420 (i.e., the light sensing order) may occur simultaneously, but the present invention is not limited thereto. In one embodiment, the optical sensor 300 may first perform step S410 and then perform step S420. Alternatively, the optical sensor 300 may first perform step S420 and then perform step S410.

[0048] In this embodiment, the processing unit 340 can calculate the first sensing signal and the second sensing signal according to a conversion function to convert the difference between the first sensing signal and the second sensing signal into a light intensity sensing value. In this embodiment, the conversion function is: Lux = a·DS ALS -b DS IR , where Lux is the light intensity sensor value and represents the illumination in lux or the brightness of the ambient light perceived by the human eye. ALS DS is the signal value of the first sensing signal. IR is the signal value of the second sensor signal. a and b are respectively the first variable and the second variable that linearly correspond the difference after subtracting the first sensor signal from the second sensor signal to the standard light intensity. It should be noted that the variable a and the variable b can be determined according to the optical characteristics of the optical element 3121 and / or the first light sensor unit 311 or other optical processing corrections, and the present invention is not limited thereto. In this regard, the light intensity sensor value generated by the processing unit 340 can be approximated to the ambient brightness perceived by the actual human eye.

[0049] For example, use Figure 3 as well as Figure 5 , Figure 5 FIG. 1 is a schematic diagram of the photosensitive response characteristics of the first light sensing unit 311 and the second light sensing unit 312 according to an embodiment of the present invention. The first light sensing units 311 in this embodiment may be silicon photodiodes. The first light sensing unit 311 senses light of each wavelength based on the light absorption or reflection characteristics of its own silicon material, and the sensing results may be as follows: Figure 5 The first spectral response curve 510 is shown. In detail, Figure 5 As shown, the first light wavelength passing range R1 of the first light sensing unit 311 at least includes the visible light band with a wavelength above 400 nanometers (nm) and the infrared light band below 1000 nanometers. Therefore, the first spectral response curve 510 has a corresponding response rate at each wavelength between approximately 400 nanometers and 1000 nanometers.

[0050] The plurality of second light sensing units 312 integrate the light absorption or light reflection characteristics of the optical element 3121 to perform light sensing on light of each wavelength. The sensing result can be formed as follows: Figure 5 The second spectral response curve 520 is shown. The second light sensing unit 312 of the present embodiment can be a light sensing unit based on an infrared light passing filter. Moreover, compared with the conventional infrared light passing filter that only allows light in the infrared light band to pass through, the present embodiment can be designed to allow a portion of light in the visible light band to pass through in addition to the infrared light band by adjusting the material and / or component doping ratio of the optical element 3121. Specifically, the second light wavelength passing range R2 of the second light sensing unit 312 of the present embodiment may include the first part of the visible light band (for example, the visible light band with a wavelength of more than 560 nanometers) and the infrared light band, so the second spectral response curve 520 has a corresponding response rate at each wavelength between about 560 and 1000 nanometers. In addition, below the first part of the visible light band, that is, the band with a wavelength of about 560 nanometers or less, is the light cutoff range of the second light sensing unit 312 of the present embodiment, so the response rate of the second spectral response curve 520 at a wavelength of about 560 nanometers or less is 0 or very close to 0.

[0051] Furthermore, it should be noted that the response degree of the second light sensing unit 312 having the optical element 3121 to the first part of the visible light band increases with the wavelength. Figure 5 As shown, the second spectral response curve 520 is a rising slope line segment in the progressive passing interval R3 corresponding to the first part of the visible light band. Specifically, in this embodiment, by configuring light absorbing or reflecting materials of different components or proportions for the optical element 3121, the second light sensing unit 312 has the following sensing characteristics: the transmittance of the light with a wavelength of 580 nanometers is about 10% to 15%, the transmittance of the light with a wavelength of 640 nanometers is about 45% to 55%, and the corresponding transmittance at 700 nanometers is about 90% or more, so as to achieve the second spectral response curve 520 The response rate gradually increases from the wavelength of 560 nanometers.

[0052] In this regard, Figure 5As shown, the response rates of the first light sensor unit 311 and the second light sensor unit 312 in the visible light band are different. The line segment trend of the first spectral response curve 510 in the infrared light band can match the line segment trend of the second spectral response curve 520 in the infrared light band. In other words, at least a portion of the line segment of the first spectral response curve 510 corresponding to the first light sensor unit 311 matches at least a portion of the line segment of the second spectral response curve 520 corresponding to the second light sensor unit 312.

[0053] Next, please refer to Figure 6 , Figure 6 FIG. 5 is a schematic diagram of the light intensity sensing value and the photosensitive response characteristics of the human eye visual result according to an embodiment of the present invention. Since the first spectral response curve 510 and the second spectral response curve 520 have the same or very similar response results in the infrared light band, and have different response results in the visible light band, the first spectral response curve 510 and the second spectral response curve 520 can form the following Figure 6 The difference curve 620 is shown. The difference curve 620 is the difference in response rate between the first spectral response curve 510 and the second spectral response curve 520 in the visible light band, and as shown in FIG. Figure 6 As shown, the difference curve 620 can match the human eye photosensitive response curve 610. The human eye photosensitive response curve 610 can refer to the photopic curve measured by the International Illumination Commission, which represents the average response value of the human eye to light. Figure 6 As shown, the response range of the human eye photosensitivity response curve 610 is approximately between 400 and 700 nanometers, with a peak at a wavelength of approximately 550 to 560 nanometers. The response level between 400 nanometers and the peak gradually increases, while the response level between the peak and 700 nanometers gradually decreases.

[0054] In detail, Figure 5 As shown, the first spectral response curve 510 has a trend of gradually increasing spectral response in the light wavelength range R0 with a wavelength below about 560 nanometers (that is, the response curve rises slowly in the direction of increasing wavelength in this range), while the second spectral response curve 520 has no spectral response or only a very low spectral response (no rising trend) in the light wavelength range R0 with a wavelength less than 560 nanometers. Therefore, after the response rates of the first spectral response curve 510 and the second spectral response curve 520 in the light wavelength range R0 are offset, the following can be obtained: Figure 6 As shown in the difference curve 620 , the spectral response in the optical wavelength range R60 between 400 and 560 nanometers has a trend of gradually increasing (the response curve rises slowly and has a positive slope).

[0055] In addition, if Figure 5As shown in FIG. 1 , the first spectral response curve 510 also has a trend of gradually increasing spectral response in the gradual passing region R3 between wavelengths of about 560 and 700 nanometers. The second spectral response curve 520 has a trend of gradually increasing spectral response in the gradual passing region R3, and the slope of the second spectral response curve 520 in the gradual passing region R3 is greater than the slope of the first spectral response curve 510. In this way, after subtracting the response rates of the first spectral response curve 510 and the second spectral response curve 520 in the gradual passing region R3, the following can be obtained: Figure 6 The difference curve 620 shown has a trend of gradually decreasing spectral response in the light wavelength range R61 between 560 nm and 700 nm (that is, the difference curve decreases slowly in the direction of increasing wavelength in this range and has a negative slope).

[0056] In addition, the first spectral response curve 510 and the second spectral response curve 520 have substantially the same response rate variation in the optical wavelength range R4 above about 700 nm. Therefore, after subtracting the response rates of the first spectral response curve 510 and the second spectral response curve 520 in the optical wavelength range R4, the following can be obtained: Figure 6 The difference curve 620 shown has a response rate of almost 0 above about 700 nanometers (i.e., most of the infrared light band). Therefore, by subtracting the response distributions corresponding to the light intensities sensed by the first light sensor unit 311 and the second light sensor unit 312, the difference curve 620 obtained corresponds to or matches the distribution of the human eye light sensitivity response curve 610. The processing unit 340 of this embodiment can calculate the first sensor signal and the second sensor signal through the above-mentioned conversion function according to the corresponding characteristics of the difference curve 620 and the human eye light sensitivity response curve 610, and obtain a signal value that meets the light intensity perceived by the human eye, and then can adaptively adjust the performance of the reaction unit or the terminal device according to the calculated signal value.

[0057] It should be noted that Figure 5 , 6 The wavelength values ​​of each interval and range endpoint described are only exemplary. According to the different spectral responses formed by the material or component differences of the first light sensing unit, the second light sensing unit can be adjusted accordingly and the configuration components and proportions of the optical elements can be adjusted to achieve a difference curve close to or consistent with the distribution of the human eye's photosensitive response. For example, in another embodiment of the present invention, the specific value of each wavelength can be within the range of ±20 nanometers of each wavelength in the above examples. Alternatively, in another embodiment of the present invention, the first light wavelength passing range R1 can include at least 300 to 1200 nanometers, the second light wavelength passing range R2 can include 500 to 1200 nanometers, and the progressive passing interval can be between 500 and 800 nanometers, or between 550 and 760 nanometers.

[0058] Figure 7is a schematic diagram of a terminal device according to an embodiment of the present invention. Figure 7 In this embodiment, the terminal device 700 includes a light sensor 720, a processing unit 740, and a reaction unit 760. The processing unit 740 is coupled to the light sensor 720 and the reaction unit 760. The light sensor 720 includes a plurality of first light sensing units 721 and a plurality of second light sensing units 722. The processing unit 740 can generate a light intensity sensing value that is similar to a human eye visual result according to the sensing results of the first light sensing unit 721 and the sensing results of the second light sensing unit 722.

[0059] In this embodiment, the terminal device 700 may be, for example, a smart phone, a tablet, a notebook computer, or other electronic devices capable of automatically adjusting display brightness. The reaction unit 760 may be a power control unit or a display unit, etc., wherein the display unit may be, for example, a liquid crystal display, a light emitting diode display (Light Emitting Diode, OLED) or an organic light emitting diode (Organic Light Emitting Diode, OLED), etc., and the present invention is not limited thereto. In addition, in one embodiment, the processing unit 740 may also be integrated into the light sensor 720, or the reaction unit 760 may also be externally provided to the terminal device 700.

[0060] In this embodiment, the processing unit 740 may generate a light intensity sensing value that is close to a human eye visual result according to the sensing result of the first light sensing unit 721 and the sensing result of the second light sensing unit 722 .

[0061] In this embodiment, taking the reaction unit 760 as a display unit as an example, the processing unit 740 can adjust the display brightness of the reaction unit 760 according to the light intensity sensing value, and the light intensity sensing value obtained by the light sensor 720 can be positively correlated with the adjusted display brightness. The terminal device 700 can sense the current ambient light through the light sensor 720, and after being processed by the processing unit 740, a light intensity sensing value similar to the current ambient light viewed by human eyes can be generated. In this way, the processing unit 740 can adjust the display brightness of the reaction unit accordingly according to the light intensity sensing value, for example, comparing the light intensity sensing value with at least one preset light intensity threshold value to determine whether to increase or decrease the display brightness of the reaction unit. For example, if the brightness of the current ambient light is high, the processing unit 740 can automatically increase the display brightness of the reaction unit 760. And if the brightness of the current ambient light is low, the processing unit 740 can automatically reduce the display brightness of the reaction unit 760. Therefore, the terminal device 700 can automatically provide corresponding display brightness according to different ambient lights, and can make the performance of the reaction unit closer to the user's feelings, thereby improving the comfort and experience of use.

[0062] In another embodiment, the terminal device 700 may be, for example, an indoor or outdoor lighting management device, and the reaction unit 760 may be, for example, a power control unit for controlling the lighting. The light sensor 720 of this embodiment may sense the ambient light indoors or outdoors, and the processing unit 740 may compare the light intensity sensing value with a preset threshold value to determine whether to drive the power control unit to turn on or off the power of the lighting. Therefore, the terminal device 700 may achieve the effect of automatically starting the lighting when the ambient brightness decreases (such as after sunset), and automatically turning off the lighting when the ambient brightness increases (such as after sunrise).

[0063] In addition, for the specific implementation and technical details of the optical sensor 720 and the processing unit 740 of this embodiment, please refer to the above Figures 1 to 6 The relevant records of the embodiments can provide sufficient teachings, suggestions and explanations, so no further details are given here. In addition, the light sensor 720 of this embodiment is not limited to ambient light sensing, but can also be applied to other light source sensing.

[0064] In summary, the optical sensor, terminal device and sensing method of the present invention can be designed with an optical element having a special spectral response and arranged on the second optical sensing unit to perform optical sensing through the first optical sensing unit and the second optical sensing unit having different transmittances in the visible light band. The optical sensor of the present invention can obtain a light intensity sensing value that is similar to the visual result of the human eye based on the sensing results of the first optical sensing unit and the second optical sensing unit, so as to realize a light intensity sensing function that is similar to the visual result of the human eye.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A light sensor, characterized in that: include: a first light sensing unit; as well as A second light sensing unit has an optical element arranged in a sensing area of ​​the second light sensing unit, The first light sensing unit has a first light wavelength passing range, and the first light wavelength passing range includes a visible light band and an infrared light band. wherein the optical element has a second light wavelength passing range, and the second light wavelength passing range includes the first part of the visible light band and the infrared light band, The second light wavelength passing range corresponds to a progressive passing interval in the first part of the visible light band.

2. The optical sensor according to claim 1, characterized in that The first part of the visible light band is between a first wavelength and a second wavelength, and the first wavelength is smaller than the second wavelength, wherein the transmittance of the optical element to light increases gradually from the first wavelength to the second wavelength.

3. The optical sensor according to claim 2, characterized in that The first wavelength is 560 nanometers, and the second wavelength is 700 nanometers, The transmittance of the second light sensing unit at a wavelength of 580 nanometers is between 10% and 15%, the transmittance of the second light sensing unit at a wavelength of 640 nanometers is between 45% and 55%, and the transmittance of the second light sensing unit at a wavelength of 700 nanometers is higher than 90%.

4. The optical sensor according to claim 1, characterized in that At least a portion of a first spectral response curve of the first light sensing unit performing light sensing matches at least a portion of a second spectral response curve of the second light sensing unit performing light sensing via the optical element.

5. The optical sensor according to claim 4, characterized in that The line segment of the first spectral response curve in the infrared light band matches the line segment of the second spectral response curve in the infrared light band.

6. The optical sensor according to claim 4, characterized in that The difference curve between the first spectral response curve and the second spectral response curve matches the photosensitive response curve of the human eye.

7. The optical sensor according to claim 4, characterized in that The optical element is disposed above a sensing region of the second light sensing unit, and an original spectral response curve of the second light sensing unit without light sensing by the optical element matches the first spectral response curve.

8. The optical sensor according to claim 1, characterized in that The light sensor is an ambient light sensor.

9. The optical sensor according to claim 1, characterized in that The optical sensor includes a plurality of first optical sensing units and a plurality of second optical sensing units, and the plurality of first optical sensing units and the plurality of second optical sensing units form a sensing pixel array on a substrate.

10. The optical sensor according to claim 9, characterized in that The plurality of first light sensing units and the plurality of second light sensing units are arranged alternately in the sensing pixel array.

11. The optical sensor according to claim 1, characterized in that Also includes: a processing unit coupled to the first light sensing unit and the second light sensing unit and configured to receive a first sensing signal output by the first light sensing unit and a second sensing signal output by the second light sensing unit, The processing unit generates a light intensity sensing value according to the first sensing signal and the second sensing signal.

12. The optical sensor according to claim 11, characterized in that The processing unit subtracts a result obtained by multiplying a signal value of the first sensing signal by a first variable from a result obtained by multiplying a signal value of the second sensing signal by a second variable to obtain the light intensity sensing value.

13. The optical sensor according to claim 11, characterized in that The processing unit adjusts the display brightness of the display unit according to the light intensity sensing value.

14. The optical sensor according to claim 13, characterized in that The light intensity sensing value is positively correlated to the display brightness.

15. The optical sensor according to claim 1, characterized in that The optical element is an optical coating or a light absorbing material.

16. A terminal device, characterized in that: include: Reaction unit; a first light sensing unit; a second light sensing unit having an optical element disposed in a sensing area of ​​the second light sensing unit; as well as a processing unit coupled to the reaction unit, the first light sensing unit and the second light sensing unit, The first light sensing unit has a first light wavelength passing range, and the first light wavelength passing range includes a visible light band and an infrared light band. wherein the optical element has a second light wavelength passing range, and the second light wavelength passing range includes the first part of the visible light band and the infrared light band, The second light wavelength passing range corresponds to a progressive passing interval in the first part of the visible light band.

17. The terminal device according to claim 16, characterized in that: The reaction unit is a power control unit.

18. The terminal device according to claim 16, characterized in that: The reaction unit is a display unit, The processing unit is used to receive a first sensing signal output by the first light sensing unit and a second sensing signal output by the second light sensing unit, and the processing unit generates a light intensity sensing value according to the first sensing signal and the second sensing signal. The processing unit adjusts the display brightness of the reaction unit according to the light intensity sensing value.

19. The terminal device according to claim 18, characterized in that: The light intensity sensing value is proportional to the display brightness.

20. A sensing method, characterized in that: include: Performing light sensing through a first light sensing unit to generate a first sensing signal; Performing light sensing by a second light sensing unit having an optical element to generate a second sensing signal, wherein the optical element is disposed in a sensing area of ​​the second light sensing unit; as well as generating a light intensity sensing value according to the first sensing signal and the second sensing signal, The first light sensing unit has a first light wavelength passing range, and the first light wavelength passing range includes a visible light band and an infrared light band. wherein the optical element has a second light wavelength passing range, and the second light wavelength passing range includes the first part of the visible light band and the infrared light band, The second light wavelength passing range corresponds to a progressive passing interval in the first part of the visible light band.

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