TWI547682B - Portable electronic device - Google Patents

Description

Portable electronic device

The invention relates to a portable electronic device, which refers to a portable electronic device that uses a light source and an optical detector to perform various functions.

Portable electronic devices are easy to carry, so with the advancement of technology, many functions have been developed that are more convenient for users to use anytime and anywhere. In addition to mobile phones with communication functions, blood glucose detecting devices and heartbeats have been developed. The detection device, the blood oxygen concentration detecting device, the alcohol concentration detecting device, the remote controller, and the like, and the individual functions of the electronic devices are achieved by using a light source and an optical detector. If users want to use these functions, they must have multiple portable electronic devices at the same time, which costs a lot of money, and a large number of portable electronic devices are not only portable, so the portable electronic devices of the prior art The device still has its drawbacks.

In view of this, the present invention integrates the functions of the prior art in order to use the same components to perform different functions in the portable electronic device.

In order to achieve the above object, the technical means adopted by the present invention is to design a portable electronic device, comprising: a first switching unit for switching the portable electronic device to a blood detecting mode; a first light source for providing a first light; an optical detector comprising at least one light detecting unit, wherein in the blood detecting mode, the optical detector detects that the first light source projects the first light The light is reflected by the object to reflect the reflected light of the first light to generate a blood detecting signal, the object is a body part of the user; a control unit is connected to the optical detector In the blood detection mode, the control unit calculates the blood pressure value of the user according to the blood detection signal.

Further, the present invention includes a second switching unit for switching the portable electronic device to an ultraviolet detection mode. In the ultraviolet detection mode, the optical detector detects the portable device. The ultraviolet light in the ambient light of the surrounding environment of the electronic device generates an ultraviolet light detecting signal, and the control unit calculates the ultraviolet light level of the surrounding environment according to the ultraviolet light detecting signal.

Further, the present invention includes a display and a second switching unit, wherein the display is provided with a backlight module, and the second switching unit is configured to switch the portable electronic device to a color detection mode, the optical The detector includes three light detecting units for detecting red light, green light and blue light respectively. In the color detection mode, the optical detectors respectively detect ambient light. The red, green and blue light are used to generate a color detection signal, and the control unit controls the illumination color contrast of the backlight module according to the color detection signal.

An advantage of the present invention is that different functions can be achieved through the same component. The portable electronic device of the present invention can provide different functions according to requirements, and can provide multiple different functions simultaneously according to requirements, and the user only needs to carry a single The portable electronic device can also use a variety of performances anytime and anywhere, which not only saves the purchase cost, but also increases the convenience of use.

The technical means adopted by the present invention for achieving the intended purpose of the invention are further described below in conjunction with the drawings and preferred embodiments of the invention. In the drawings, the content of the mobile phone is illustrated as a portable electronic device, but the mobile phone can be replaced by other possible portable electronic devices, such as a tablet computer, or a smart watch and smart glasses. Wearable electronic device.

Referring to FIG. 1 , the portable electronic device of the present invention includes at least one switching unit 10 , an optical detector 20 , at least one light source 30 , and a control unit 40 .

The switching unit 10 can be an application computer image displayed on a display 101. The display 101 can have a backlight module 102 and different switching units 10 (such as the first switching unit 10A and the second switching unit 10B). Corresponding to different functional modes, when each switching unit 10 is triggered (such as a user's finger to select any computer image), the portable electronic device will enter the corresponding functional mode. In addition to being presented as a computer image, the switching unit 10 can also be configured on the portable electronic device for the physical button, and the user can also switch the required function.

As shown in FIG. 1 and FIG. 2 , the optical detector 20 includes at least one photo detecting unit 21 and at least one driving unit 22 , and each driving unit 22 is connected to a corresponding light source 30 for driving. The light detecting unit 21 can receive the light generating optical detection signal through a predetermined hole in the portable electronic device, and the light source 30 can project light to the portable through a predetermined hole in the portable electronic device. In addition to the electronic device, the number of the light detecting unit 21, the light source 30, and the driving unit 22 may be determined according to functional requirements, and the positional relationship between the light detecting unit 21 and the light source 30 may also be visually functional. Depending on the needs. Further, the light source 30 and the optical detector 20 can be integrated in an integrated circuit package. 1 is a light source 30 with a two-light detecting unit 21, the light source 30 is disposed between the two light detecting units 21, but FIG. 1 is only one specific embodiment of the present invention, and is not limited thereto. this invention. In a preferred embodiment, the optical detector 20 includes a plurality of photodetecting units 21, a timing controller TC, an amplifier AMP, an active gain controller AGC, an analog digital converter ADC, a digital filter DF, and a plurality of The device MUX, the control register CR, the data register DR, the interrupt interface II, the transmission interface TSI, the light source controller LC, the oscillator OSC, the bias circuit BC, and the temperature detector TS. The light detecting unit 21 is configured to detect light to generate the optical detecting signal. The amplifier AMP is used to amplify the optical detection signal, and its gain capability can be adjusted by the active gain controller AGC. The active gain controller AGC can adjust the processed optical detection signal to the required brightness by adjusting the gain of the amplifier AMP and the integration time "integration time" of the light detecting unit 21. The analog-to-digital converter ADC converts the amplified optical detection signal into a digital signal. The digital filter DF is used to filter noise. The timing controller TC is used to manage the timing of each component in the optical detector 20. The temperature detector TS is used to detect the temperature. The bias circuit BC is the bias source for the analog circuit. The oscillator OSC is the source of the clock. The light source controller LC is used to control the aforementioned internal light source or external light source. The control register CR and the data register DR are used to store commands and detection results, respectively. The transmission interface TSI is used to transmit commands or materials to the control unit 40. The interrupt interface II is used to notify the control unit 40 of the state of the storage space to determine the transmission of the data.

When the portable electronic device of the present invention is implemented, different implementation processes may be performed according to different modes selected by the user.

As shown in FIG. 3 and FIG. 2, after the user selects the required mode through the switching unit 10 (S11), the control unit 40 commands the optical detector 20 to The corresponding driving unit 22 drives the corresponding light source 30 (S12), and the reflected light generated by the light of the light source 30 is received by the corresponding light detecting unit 21 and generates a light detecting signal (S13). The generated photodetection signal can be stored in the data register DR. The control unit 40 reads the photodetection signal stored in the data register DR to determine whether the generated photodetection signal is a valid signal (S14); if it is not a valid signal, returning to the step of receiving the light detecting signal (S13); if it is a valid signal, stopping driving the light source (S15), the control unit 40 according to the mode selected by the user, The parameter to be output is calculated according to the received photodetection signal (S16), and the calculation result is output according to the selected mode.

Specifically, since the blood is sent to the whole body when the heart is contracted, and the blood is returned to the heart when expanding, the first switching unit 10A selects the blood pressure detecting mode, the heartbeat detecting mode, the blood vessel hardening detecting mode, Or the blood vessel blocking detection mode, the light source 30 provides a first light, the first light is projected to the user's finger, and the light detecting unit 21 of the optical detector 20 receives the reflected light of the first light to generate a blood test. The control unit 40 obtains the blood pressure value according to the blood detection signal and calculates the blood pressure value according to the blood detection signal; when the heartbeat detection mode is performed, the control unit 40 according to the blood detection The signal is subjected to Fourier transform to generate a spectrum, and the heartbeat number is obtained according to the spectrum; when performing the vascular sclerosis detection mode or the vascular occlusion mode, the control unit 40 can process the blood detection signal using an existing processing mechanism to obtain Degree of vascular sclerosis or vascular occlusion index. That is to say, the blood detection signals generated by the optical detector 20 are processed by different algorithms, that is, different physiological indexes can be obtained. Since such techniques can be achieved by a number of different methods and are disclosed, they are not described herein. In the above detection modes, the light source 30 in the preferred embodiment may use a light source having a wavelength of 400 to 1000 nanometers (nm), more preferably a wavelength of 550 nanometers (nm), and the first switching unit. The 10A can simultaneously activate the blood pressure detecting mode, the heartbeat detecting mode, the blood vessel hardening detecting mode, and the blood vessel blocking detecting mode, and the respective detecting modes are individually activated by different switching units 10.

Further, if the portable electronic device can provide the blood oxygen detection mode, it is necessary to have two first light sources 30A and 30B emitting different wavelengths (as shown in FIGS. 4A and 4B), preferably. The 660 nm (nm) red light source and the 940 nm (nm) infrared light source are switched to the blood oxygen detecting mode through a second switching unit 10B to drive the first light source 30A and the second light source 30B. The first and second light rays L respectively emitted by the first light source 30A and the second light source 30B are projected to the finger F of the user, and the optical detector 20 receives the reflected light of the first light and the second light to generate blood. The oxygen detecting signal, because the light of different wavelengths is different from the energy of the light reflected by the oxygen-containing blood and the oxygen-free blood, the control unit 40 can use the existing processing mechanism to process the blood oxygen detecting signal to Obtain blood oxygen saturation. In the preferred embodiment, the optical detector 20 has two different optical detecting units 21 for respectively receiving the first light and the second light of different wavelengths, or the optical detector 20 has only a single optical detection. In the unit 21, the first light source 30A and the second light source 30B are turned on in turn, so that the optical detecting unit 21 sequentially receives the first light and the second light of different wavelengths. The first light source 30A can be independently disposed, and the optical detector 20 and the second light source 30B are integrated in an integrated circuit package (as shown in FIG. 4A); or the first light source 30A and the second light source 30B. And the optical detector 20 is integrated in an integrated circuit package (as shown in FIG. 4B).

Further, if the alcohol detection mode is to be used, the second light switch 30 is switched to the alcohol detection mode, and the light source 30 provides a first light, which is generated by the gas exhaled by the user. The light detecting unit 21 of the optical detector 20 receives the reflected light of the first light to generate an alcohol detecting signal, and the control unit 40 performs an analysis and comparison with the preset data according to the alcohol detecting signal to Calculating the alcohol concentration, the preset data may be a photodetection signal generated when the general exhaled gas does not contain alcohol. In the preferred embodiment, the light source 30 can use infrared light having a wavelength of 850 nm. light source. Since the alcohol absorbs infrared light of a specific wavelength, the light source 30 emits infrared light through the exhaled gas, and if the gas contains alcohol, the infrared light will be absorbed, and the value output by the optical detector 20 will be absorbed by the alcohol. The value comes low. The alcohol concentration can be calculated by quantitative analysis of the alcohol concentration using the above measurement method.

As shown in FIG. 5 and FIG. 2, after the user selects the required mode through the switching unit 10 (S21), the control unit 40 commands the optical detector 20 to The corresponding driving unit 22 drives the corresponding light source 30 (S22), and the reflected light generated by the light of the light source 30 is received by the corresponding light detecting unit 21 and generates a light detecting signal (S23). The generated photodetection signal can be stored in the data register DR. The control unit 40 reads the photodetection signal stored in the data register DR to determine whether the generated photodetection signal is The predetermined number of times (S24); if the predetermined number of times has not been reached, the step of receiving and generating the light detecting signal is returned (S23); if the predetermined number of times has been reached, the driving of the light source is stopped (S25), and the control unit 40 is The mode selected by the user calculates the parameter to be output according to the received light detection signal (S26), and outputs the calculation result or adjusts other components according to the selected mode.

Specifically, if the proximity detection mode is selected by the second switching unit 10B, or the portable electronic device can directly initiate the proximity detection mode (for example, a voice call) according to the execution of the specific application without the switching unit 10 in a specific situation. Further detecting whether an object is close to the surface of the portable electronic device, the light source 30 provides a first light, and if an object approaches, the first light is projected onto the surface of the object to form reflected light, the optical detection The light detecting unit 21 of the device 20 receives the reflected light of the first light to generate a proximity detecting signal. When the object is closer, the intensity of the reflected light is greater, and the control unit 40 can further increase the value of the detecting signal. To determine if an object is close. In a preferred embodiment, the portable electronic device can automatically enter the proximity detection mode during a voice call, and turn off the touch detection of the mobile phone when detecting a large object such as a human face approaching.

Further, the portable electronic device can provide a gesture detection mode, which uses a light source 30 with an optical detection unit 21, and when the second detection unit 10B selects a gesture detection mode, the light source 30 projects light and optically detects The unit 21 determines whether a gesture is generated according to the presence or absence of the reflected light, and can be switched as a switch to turn on or off the specific function of the portable electronic device.

Further, if the portable electronic device provides the gesture detection mode, the first light source 30A and the second light source 30B (as shown in FIG. 4 ) are combined with an optical detection unit 21 or may have a light source. 30 is matched with two optical detecting units 21. If the two light sources are combined with an optical detecting unit, when the second detecting unit 10B selects the gesture detecting mode, when the finger F moves, the first light source 30A and the second light source 30B continuously project light onto the finger F. The reflected light is generated. Since the two light sources 30A, 30B are alternately illuminated, the single optical detecting unit 21 of the optical detector 20 receives the finger F for the two light sources 30A, 30B according to the light emitting order of the light sources 30A, 30B. The reflected light, according to the order in which the light sources 30A, 30B emit light, and the result of the detection by the optical detecting unit 21, two different phases of reflected light waveforms can be obtained, for example, when the first light source 30A emits light, optical detection The signal detected by the detector 20 belongs to the first waveform. When the second light source 30B emits light, the signal detected by the optical detector 20 belongs to the second waveform, and the control unit 40 can according to the two reflections. The phase relationship of the light (leading or backward) is used to judge the movement of the finger F. If a single light source is combined with two optical detecting units, when the finger F moves, the light source 30 will continuously project light onto the finger F to generate reflected light, and the intensity of the reflected light received by the optical detecting unit 21 closer to the finger F Therefore, the reflected light information received by each optical detecting unit 21 can be used to determine the position or movement of the finger , wherein the reflected light received by each optical detecting unit 21 is converted into the optical detector 20 The output is provided by the control unit 40 to determine the movement of the finger. The operation of the gesture can be performed with a finger, a palm, or a hand. For example, the entire optical detection unit array in the optical detector 20 can detect the image, and then calculate the position and movement trajectory of the finger by using the image. If the first light source 30A and the second light source 30B are used, and the optical detector 20 has a single optical detecting unit 21, the gesture can be determined in an axial direction, for example, the hand moves from left to right or right to left; The detector 20 has at least three optical detecting units 21, and can perform gesture determination in four directions of up, down, left, and right; if the optical detector 20 has an array of optical detecting units 21 (for example, an array of 8 by 8), The image detected by the array of the optical detecting unit 21 calculates the position and movement trajectory of the finger, but the action that the gesture can do is not limited to the above. Since such technologies have a variety of practices and are open technologies, they are not described here.

As shown in FIG. 6 and FIG. 2, after the user selects the required mode through the switching unit 10 (S31), the control unit 40 commands the optical detector 20 to The corresponding light detecting unit 21 receives and generates a light detecting signal (S32), and the generated light detecting signal can be stored in the data register DR, and the control unit 40 reads the data register DR After storing the light detection signal, determining whether the generated light detection signal is for a predetermined number of times (S33); if the predetermined number of times has not been reached, returning to the step of receiving and generating the light detection signal (S32); When the predetermined number of times is reached, the control unit 40 calculates the parameter to be output according to the received light detection signal according to the mode selected by the user (S34), and outputs the calculation result or adjusts the other according to the selected mode. element.

Specifically, if the ultraviolet light detecting mode is selected by the second switching unit 10B, the light detecting unit 21 of the optical detector 20 receives the ultraviolet light in the ambient light and generates an ultraviolet light detecting signal, and the control unit 40 Through the generated ultraviolet light detection signal, the ultraviolet light intensity in the current ambient light is calculated, and the calculation result is output, and the user can judge the outgoing equipment or go out according to the ultraviolet light intensity level. There are quite a few ways to detect ultraviolet light and it is a publicly available technology, so it will not be repeated here.

Further, if the portable electronic device provides the color detection mode, at least three light detecting units 21 are required to detect red light, green light, and blue light respectively, and the color is selected through the second switching unit 10B. The detection mode, or the portable electronic device automatically activates the color detection mode when the display 101 is woken up, the three light detecting units 21 receive and generate a color detection signal, and the control unit 40 transmits the generated color detection. The signal is used to calculate the ratio of red, green, and blue light in the ambient light, and further adjust the illumination color contrast of the backlight module 102 of one of the displays 101. By using the color detection mode, the illumination color contrast of the backlight module 102 of the display 101 can be changed according to the color tone of the ambient light, thereby providing a better visual effect. There are quite a few ways to detect the color of ambient light and control the backlight module, and it is a publicly available technology, so it will not be described here.

Further, if the ambient light detection mode is selected by the second switching unit 10B, or the portable electronic device automatically activates the ambient light detection mode when the display 101 is awakened, the optical detector 20 detects the intensity of the ambient light. The light detecting unit 21 receives and generates an ambient light detecting signal, and the control unit 40 calculates the intensity of the current ambient light through the generated ambient light detecting signal, and further adjusts the luminous intensity of the backlight module 102 of the display 101. . By the ambient light detection mode, the illumination intensity of the backlight module 102 of the display 101 can be changed according to the intensity of the ambient light, thereby providing a better visual effect. There are quite a few practices and techniques for how to detect ambient light and control the backlight module, and therefore will not be described here.

In summary, the portable electronic device of the present invention can be switched to different detection modes through the switching unit 10, and the light source 30 and the optical detector 20 can cooperate to achieve different detection functions and provide different functions. The detection result is convenient for the user to use a plurality of different functions by using a single portable electronic device, thereby increasing the convenience of use.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and A person skilled in the art can make some modifications or modifications to equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. The present invention is not limited to any simple modifications, equivalent changes and modifications of the above embodiments.

10‧‧‧Switch unit
101‧‧‧ display
102‧‧‧Backlight module
10A‧‧‧First switching unit
10B‧‧‧Second switching unit
20‧‧‧ Optical detector
21‧‧‧Light detection unit
22‧‧‧Drive unit
30, 30A, 30B‧‧‧ light source
40‧‧‧Control unit
TC‧‧‧ timing controller
AMP‧‧Amplifier
AGC‧‧‧ Active Gain Controller
ADC‧‧‧ Analog Digital Converter
DF‧‧‧ digital filter
MUX‧‧‧Multiplexer
CR‧‧‧Control Register
DR‧‧‧data register
II‧‧‧Interrupt interface
TSI‧‧‧ receiving interface
LC‧‧‧Light source controller
OSC‧‧‧Oscillator
BC‧‧‧bias circuit
TS‧‧‧Temperature Detector

Figure 1 is a schematic illustration of the invention. 2 is a schematic circuit diagram of an optical detector of the present invention. 3 is a flow chart of a first embodiment of the present invention. 4A and FIG. 4B are schematic diagrams of the optical detector of the present invention when the finger is used corresponding to the light source. Figure 5 is a flow chart of a second embodiment of the present invention. Figure 6 is a flow chart of a third embodiment of the present invention.

10‧‧‧Switch unit

101‧‧‧ display

102‧‧‧Backlight module

10A‧‧‧First switching unit

10B‧‧‧Second switching unit

20‧‧‧ Optical detector

21‧‧‧Light detection unit

30‧‧‧Light source

40‧‧‧Control unit

Claims (20)

A portable electronic device includes: a first switching unit for switching the portable electronic device to a blood detecting mode; and a second switching unit for switching the portable electronic device to An alcohol detecting mode; a first light source for providing a first light; an optical detector comprising at least one light detecting unit, wherein the optical detecting device detects the light detecting mode The first light source projects the reflected light generated by the first light to an object to reflect the reflected light of the first light through the object to generate a blood detecting signal, wherein the object is a body part of the user; In the detecting mode, the first light source projects the first light to the gas blown by the user, the optical detector detects the reflected light of the gas to generate an alcohol detecting signal; and a control unit connects the optical detecting In the blood detecting mode, the control unit calculates the blood pressure value of the user according to the blood detecting signal; in the alcohol detecting mode, the control unit calculates the user according to the alcohol detecting signal Concentration in the alcohol. The portable electronic device of claim 1, wherein the control unit calculates the heartbeat, or the hardening index of the blood vessel, or the vascular obstruction index of the user based on the blood detecting signal. The portable electronic device of claim 1, further comprising: a third switching unit for switching the portable electronic device to a blood oxygen detecting mode; and a second light source for providing a The second light is different from the wavelength of the first light; wherein, in the blood oxygen detecting mode, the optical detector detects that the first light source and the second light source respectively project the first light and the first light The light is reflected by the object to reflect the reflected light of the first and second rays to generate a blood oxygen detecting signal, and the control unit calculates the blood oxygen saturation according to the blood oxygen detecting signal. . The portable electronic device of claim 1, wherein the first light source projects the first light to an object in a proximity detection mode, and the optical detector detects the reflected light of the object to generate A proximity detecting signal, the control unit determines, according to the proximity detecting signal, whether an object is in proximity to the portable electronic device. The portable electronic device of claim 1, further comprising a display, the display having a backlight module, wherein the optical detector detects ambient light brightness of the surrounding environment of the portable electronic device to generate an environment The light detecting signal, the control unit controls the brightness of the backlight module according to the ambient light detecting signal. The portable electronic device of claim 1, further comprising a third switching unit for switching the portable electronic device to a gesture detection mode, wherein the gesture detection mode is at least one The light detecting unit detects the reflected light generated by the first light source to the first light to an object, and generates a gesture detection signal by using the sensing information detected by the at least one light detecting unit, the control unit A gesture is determined based on the gesture detection signal. The portable electronic device of claim 1, further comprising a third switching unit for switching the portable electronic device to a gesture detection mode, the optical detector comprising a plurality of optical detectors a detecting unit, in the gesture detecting mode, the light detecting unit detects the reflected light generated by the first light source to project the first light to an object, and is respectively detected by the light detecting units The sensing information is used to generate a gesture detection signal, and the control unit determines a gesture according to the gesture detection signal. The portable electronic device of claim 1, further comprising a second switching unit and at least one second light source, wherein the second light source is configured to provide a second light, and the third switching unit is configured to The portable electronic device switches to a gesture detection mode, and the optical detector includes a light detecting unit, wherein the light detecting unit detects the first light source and the at least one The second light source projects the reflected light generated by the first and second light rays to an object to generate a gesture detection signal by detecting the different signals of the light through the light detecting unit, and the control unit according to the gesture The detection signal determines a gesture. The portable electronic device of any one of claims 6 to 8, wherein the gesture is an instruction corresponding to the control unit. The portable electronic device of claim 1, further comprising a third switching unit for switching the portable electronic device to an ultraviolet light detecting mode, in the ultraviolet light detecting mode, The optical detector detects the ultraviolet light in the ambient light of the environment surrounding the portable electronic device to generate an ultraviolet light detecting signal, and the control unit calculates the ultraviolet light level of the surrounding environment according to the ultraviolet light detecting signal. The portable electronic device of claim 1, further comprising a display and a third switching unit, wherein the display is provided with a backlight module, wherein the third switching unit is configured to switch the portable electronic device to In a color detection mode, the optical detector includes three light detecting units for detecting red, green and blue light respectively. In the color detecting mode, the opticals The detector detects red, green and blue light in the ambient light to generate a color detection signal, and the control unit controls the illumination color contrast of the backlight module according to the color detection signal. The portable electronic device of any one of claims 1, 6, 7, and 11, wherein the first light source and the optical detector are integrated in an integrated circuit package. The portable electronic device of claim 3 or 8, wherein the first light source, the second light source and the optical detector are integrated in an integrated circuit package. The portable electronic device of claim 1, wherein the first switching unit is an application pattern displayed on a display. The portable electronic device of any one of claims 1, 6, 7, and 11, wherein the optical detector is provided with a driving unit that connects and controls the first light source. The portable electronic device of claim 3 or 8, wherein the optical detector is provided with two driving units, and each driving unit respectively connects and controls the first light source and the second light source. A portable electronic device includes: a first switching unit for switching the portable electronic device to a blood detection mode; a second switching unit for switching the portable electronic device to a gesture detection mode; a first light source The optical detector includes at least one light detecting unit. In the blood detecting mode, the optical detector detects that the first light source projects the first light to a The reflected light generated by the object generates a blood detecting signal by reflecting the reflected light of the first light through the object, and the object is a body part of the user; in the gesture detecting mode, the at least one light detecting The measuring unit detects the reflected light generated by the first light source to project the first light to an object, and generates a gesture detection signal through the sensing information detected by the at least one light detecting unit; a control unit is connected In the blood detecting mode, the control unit calculates the blood pressure value of the user according to the blood detecting signal; in the gesture detecting mode, the control unit determines the signal according to the gesture detecting signal One Potential. The portable electronic device of claim 17, wherein the optical detector comprises a plurality of light detecting units, wherein the light detecting unit detects the first light source to project the light detecting unit The reflected light generated by the first light to an object generates the gesture detection signal through the sensing information detected by the light detecting units. The portable electronic device of claim 17, further comprising at least one second light source for providing a second light source, the optical detector comprising a light detecting unit In the gesture detection mode, the light detecting unit detects the reflected light generated by the first light source and the at least one second light source to project the first light and the second light source to transmit the light through the light detecting unit respectively. A sensing signal of different light is detected to generate the gesture detection signal. The portable electronic device of any one of claims 17 to 19, wherein the gesture is an instruction corresponding to the control unit.