TW201631456A - Gesture sensing module, method, and electronic apparatus thereof - Google Patents

Abstract

A gesture sensing module, an electronic apparatus and a detection method thereof are provided. The gesture sensing module disposed on a substrate includes at least one light emitting unit, at least one light sensor, and a control circuit. The light emitting unit provided a light beam to illuminate a sensing area, wherein a central optical axis of the light beam and a normal vector of the substrate have an angle therebetween, and the angle is not zero. The light sensor senses a reflected light which a target reflects the light beam in the sensing area to generate a sensing signal according to the reflected light. The control circuit coupled to the light sensor and the light emitting unit determines a travelling direction of the target according to the sensing signal.

Description

Gesture sensing module, method and electronic device thereof

The invention relates to a sensing module, and in particular to a gesture sensing module, a method and an electronic device thereof.

Most of today's touch-based mobile devices are mainly used to move a traditional keyboard to a virtual keyboard of a touch screen, or to enhance the touch function into a special directional operation. The user can use simple gesture control to perform the function of zooming in and out on the object in the picture. However, some conventional techniques still need to operate in a manner that touches the screen.

A variety of different types of sensing methods have been available on the market, such as: sound sensing, gesture sensing, etc., wherein the gesture sensing is mainly by setting a plurality of light sources and a plurality of sensors in the mobile device, so that the user is When the operation is performed, the mobile device can detect the user's operation instruction without touching the screen.

Please refer to FIG. 1. FIG. 1 is a graph of normalized reflected light intensity and time of a sensing signal obtained by a conventional gesture sensing module. Curve C100 represents the change in the intensity of the normalized reflected light sensed by the light sensor at various points in time. By comparing the sensing signals induced by the plurality of light sensors, the mobile device can detect the user's operation indication.

The embodiment of the invention provides a gesture sensing module. The gesture sensing module is disposed on the substrate and includes at least one light emitting unit, at least one light sensor, and a control circuit, wherein the control circuit is coupled to the light sensor and the light emitting unit. The light emitting unit is configured to provide a light beam to illuminate the sensing region, wherein the central optical axis of the light beam and the normal vector of the substrate An angle is formed and the angle is not zero. The light sensor is configured to sense the reflected light of the reflected beam of the target in the sensing area, and generate a sensing signal according to the reflected light. The control circuit determines the traveling direction of the target based on the sensing signal.

In summary, the gesture sensing module and method and the electronic device provided by the embodiments of the present invention can utilize at least one light emitting unit and at least one sensor to sense the traveling direction of the target, for example, the target is left. Move to the right, right to left, top to bottom, or bottom to top. Therefore, the gesture sensing module, the method and the electronic device thereof can determine a more diverse operation mode, thereby increasing the flexibility of the user operation and reducing the calculation amount of the back end circuit.

In order to further understand the technology, method and effect of the present invention in order to achieve the intended purpose, reference should be made to the detailed description and drawings of the present invention. The drawings and the annexed drawings are intended to be illustrative and not to limit the invention.

1, 1a, 1b‧‧‧ gesture sensing module

2, 2'‧‧‧ base

10‧‧‧Lighting unit

12‧‧‧Light sensor

14‧‧‧Control unit

15‧‧‧First optical lens

16‧‧‧Second optical lens

18‧‧‧ Targets

20‧‧‧Sensing area

22, 22’, 52, 54‧‧‧ light spots

60‧‧‧Electronic devices

T1‧‧‧ first time interval

T2‧‧‧ second time interval

C100, C200, C300, C400, C410‧‧‧ curves

S801~S807‧‧‧Steps

C_AXIS‧‧‧Central Optical Axis

N_VEC‧‧‧ normal vector

C_P‧‧‧ center point

γ ‧‧‧ angle

FIG. 1 is a graph of normalized reflected light intensity and time of a sensing signal obtained by a conventional gesture sensing module.

2A is a schematic diagram of operation of a gesture sensing module according to an embodiment of the present invention.

2B is a schematic diagram of a sensing area of the gesture sensing module of FIG. 2A.

2C is a functional block diagram of a gesture sensing module according to an embodiment of the present invention.

2D is a graph of normalized reflected light intensity versus time of the sensed signal obtained by the gesture sensing module of FIG. 2A.

FIG. 3 is a graph showing normalized reflected light intensity and time of another sensing signal obtained by the gesture sensing module according to the embodiment of the present invention.

FIG. 4A is a schematic diagram of operation of a gesture sensing module according to another embodiment of the present invention.

4B is a schematic diagram of a sensing area of the gesture sensing module of FIG. 4A.

4C is a graph of normalized reflected light intensity versus time of the sensed signal acquired by the gesture sensing module of FIG. 4A.

4D is a graph showing normalized reflected light intensity and time of another sensing signal obtained by the gesture sensing module according to another embodiment of the present invention.

FIG. 5 is a schematic diagram of operation of a gesture sensing module according to another embodiment of the present invention.

FIG. 6 is a schematic diagram of a sensing area of a gesture sensing module according to another embodiment of the present invention.

FIG. 7 is a schematic diagram of an electronic device according to an embodiment of the present invention.

FIG. 8 is a flowchart of a gesture sensing method according to an embodiment of the present invention.

The embodiment of the present invention provides a gesture sensing module, a method, and an electronic device thereof. The gesture sensing module, method, and electronic device thereof can have at least one light emitting unit and at least one light sensor. The central optical axis of the light beam emitted by the light emitting unit forms an angle of not zero with the normal vector of the substrate, so that the light intensity of the light beam emitted by the light emitting unit is not concentrated in the positive center of the sensing region. Therefore, the light sensor can directly judge the user's gesture through the change of the sensing signal during the sensing time. Since the light intensity of the light beam emitted by the light emitting unit is not concentrated in the center of the sensing area, the sensing signal acquired by the light sensor when the user's hand is from left to right or from right to left The signal is an asymmetrical signal, so the control circuit can determine the user's gesture from left to right or from right to left, for example, through the rising slope and the falling slope of the sensing signal.

Since the gesture sensing module, the method and the electronic device thereof can sense the gesture of the user by using only one light emitting unit and one light sensor, the complexity of the implementation is not high, so the operation of the back end circuit can be reduced. the complexity. In addition, the electronic device may perform an operation of the application according to the direction of travel determined by the gesture sensing module, for example, a screen image flipping or zooming operation, and thus, when used When operating the electronic device, the user can execute the related application without touching the electronic device. Briefly, the above-described gesture sensing module, method and electronic device thereof can increase the flexibility of the user operation, and also enable the electronic device to provide a variety of operation modes.

[Example of gesture sensing module]

Referring to FIG. 2A to FIG. 2C, FIG. 2A is a schematic diagram of operation of a gesture sensing module according to an embodiment of the present invention, FIG. 2B is a schematic diagram of a sensing area of the gesture sensing module of FIG. 2A, and FIG. 2C is a schematic diagram of the present invention. A functional block diagram of a gesture sensing module provided by an embodiment. The gesture sensing module 1 is disposed on the substrate 2, and the gesture sensing module 1 includes at least one light emitting unit 10, at least one light sensor 12, and a control circuit 14, wherein the control circuit 14 is coupled to the light emitting unit 10 and the light sense Detector 12.

The light emitting unit 10 is configured to provide a light beam to illuminate the sensing region 20, wherein the central optical axis C_AXIS of the light beam forms an angle γ with the normal vector N_VEC of the substrate 2, and the angle γ is not zero. The light sensor 12 is configured to sense the reflected light of the reflected light beam of the target 18 in the sensing region 20, and generate a sensing signal according to the reflected light. The control circuit 14 determines the traveling direction of the object 18 based on the sensing signal.

It should be noted that, in this embodiment, the first optical lens 15 is disposed above the photo sensor 12, for example, a convex lens, to receive the reflected light of the reflected light of the target 18, and to focus the reflected light on the light. In the detector 12. In addition, in the embodiment, the second optical lens 16 is disposed above the light emitting unit 10, such as a convex lens, such that the central optical axis C_AXIS of the light beam emitted by the light emitting unit 10 is offset from the normal vector N_VEC of the substrate 2, The central optical axis C_AXIS of the beam forms an angle γ with the normal vector N_VEC of the substrate 2. In more detail, the center point of the orthographic projection of the second optical lens 16 does not overlap with the center point of the light emitting unit 10, and the light beam emitted by the light emitting unit 10 is offset from the normal vector N_VEC of the substrate 2, and causes the center of the light beam. The optical axis C_AXIS forms an angle with the normal vector N_VEC of the substrate 2.

Briefly, the light unit 10 emits a light beam that is oblique to the substrate 2, rather than having the light emitting unit 10 emit a light beam perpendicular to the substrate 2 as in the prior art. Therefore, the sensing signals obtained by the photo sensor 12 may be different due to different gestures of the user, and the control circuit 14 can determine the type of the gesture according to the sensing signal.

In addition, in this embodiment, the photo sensor 12 can be, for example, a photo diode, and the light emitting unit 10 can be, for example, a light emitting diode (LED). However, the present invention does not limit the types of the photo sensor 12 and the light emitting unit 10. In addition, the first lens 15 and the second lens 16 are not limited to a convex lens having a glass material, and the present invention does not limit the materials of the first lens 15 and the second lens 16, and the first lens 15 and the first lens 15 The two lenses 16 may be a lens combination of focusing effects.

Referring again to FIGS. 2A-2C, specifically, the photo sensor 12 forms a sensing region 20, wherein the sensing region 20 has a sensing range of approximately 40 degrees to minus 40 degrees, and the light emitting unit 10 is provided with a tilt negative A 20 degree beam is used to illuminate the sensing region 20, and a light spot 22 that is offset to the left is formed in the sensing region 20 (as shown in FIG. 2B). In other words, the light beam emitted from the light emitting unit 10 is not irradiated at the center point C_P of the sensing region 20. When there is a target 18 (such as a user's hand) moving from a side (left side) of the sensing area 20 in a first direction (for example, from left to right), the object 18 is first emitted by the light emitting unit 10. The light is irradiated, and as the target 18 is closer to the light spot 22, the light reflected from the light beam of the light-emitting unit 10 reflected by the target 18 is also increased. In other words, as the object 18 is farther away from the spot 22, the reflected light of the light beam reflected by the object 18 of the light-emitting unit 10 becomes less and less. The photo sensor 12 can sense the change of the reflected light to generate a sensing signal correspondingly, and transmit the sensing signal to the control circuit 14. Next, the control circuit 14 determines the traveling direction of the target 18 based on the sensing signal.

Please refer to FIG. 2D together. FIG. 2D is a graph of normalized reflected light intensity and time of the sensing signal obtained by the gesture sensing module of FIG. 2A. In FIG. 2D, the vertical axis represents the normalized reflected light intensity (Normalized Response), so the maximum value on the vertical axis is 1, and the horizontal axis represents the normalized time axis in units of seconds (S). Curve C200 is used to normalize the reflected light intensity at various points in time for the sensed signal. In addition, In FIG. 2D, the time interval is divided into a first time interval T1 and a second time interval T2.

As can be seen from FIG. 2D, since a light beam having a tilt negative 20 degrees emitted by the light emitting unit 10 is irradiated into the sensing region 20, when the target 18 passes through the sensing region 20 in the first direction, when the target object When the 18 is located directly above the light spot 22, the reflected light of the reflected light of the target 18 will be more and more, and the intensity of the reflected light will become larger and larger. At this time, the light sensor 12 can be based on the reflected light. A change in the intensity of the light produces a corresponding sensing signal.

Since the light source unit 10 provides a light beam that is deflected to the left, and the direction of the object 18 is in the first direction, the object 18 is initially illuminated by the light beam. Therefore, the sensing signal generated by the sensor 12 rises slowly during the rising edge time. When the target 18 passes directly above the light spot 22 and continues to approach the other side of the sensing region 20 in the first direction, at this time, the reflected light of the reflected light of the target 18 is less and less, and the light is less. The reflected light sensed by the sensor 12 is also relatively reduced, so that the generated sensing signal drops rapidly during the falling edge time. Therefore, the control circuit 14 can determine whether the direction of the path of the target 18 is the first direction or the second direction (from right to left) by the change of the rising edge time and the falling edge time of the sensing signal.

For example, since the light-emitting unit 10 provides the left-hand beam and the traveling direction of the object 18 is the first direction, the light-emitting unit 10 will first illuminate the target 18, so that the light sensor 12 will slowly The largest reflected light is sensed. Accordingly, the rising edge time of the sensing signal is long (generally defined as the time when the normalized reflected light intensity is increased from 0.1 to 0.9, but the invention is not limited thereto), and when the target 18 is self-lighting in the first direction. When point 22 leaves, the falling edge time of the sensing signal (generally defined as the time when the normalized reflected light intensity decreases from 0.9 to 0.1, but the invention is not limited thereto) is shorter.

It can be seen from this that the control circuit 14 can determine the traveling direction of the target 18 based on the change in the sensing signal during the rising edge time and the falling edge time. For example, the control circuit 14 can determine the traveling direction of the target 18 based on the slope of the rising edge time of the sensing signal and the slope of the falling edge time. Therefore, when the control circuit 14 determines that the sensing signal is The slope of the rising edge time is lower than the slope of the sensing signal at the falling edge time, at which time the control circuit 14 determines that the traveling direction of the target 18 is the first direction (from left to right). Conversely, when the control circuit 14 determines that the slope of the sensing signal at the rising edge time is greater than the slope of the sensing signal at the falling edge time, the control circuit 14 determines that the traveling direction of the target 18 is the second direction (from right to left). Where the first direction is opposite to the second direction.

It is worth mentioning that the control circuit 14 can determine the traveling direction of the target 18 according to the slope of the rising edge time of the sensing signal and the slope of the sensing signal at the falling edge time, and can also be based on the sensing signal at the rising edge time. The luminance product value (the integrated value of the normalized reflected light intensity) and the luminance product value of the sensing signal at the falling edge time determine the traveling direction of the target 18. That is, when the luminance product value of the sensing signal at the rising edge time is greater than the luminance product value of the sensing signal at the falling edge time, it is determined that the traveling direction of the target 18 is the first direction. Conversely, when the luminance product value of the sensing signal at the rising edge time is less than the luminance product value of the sensing signal at the falling edge time, it is determined that the traveling direction of the target 18 is the second direction.

In other embodiments, the control circuit 14 can also determine the direction of travel of the target 18 based on the ratio of the rising edge time of the sensing signal to the falling edge time. For example, when the ratio of the rising edge time to the falling edge time is greater than 1, it is determined that the traveling direction of the target 18 is the first direction. Conversely, when the ratio of the rising edge time to the falling edge time is less than 1, it is judged that the traveling direction of the target 18 is the second direction. Therefore, the present invention does not limit the control circuit 14 to determine the traveling direction of the target 18 based on the slope of the rising edge time and the falling edge time, the luminance product value, or the ratio of the rising edge time to the rising edge time.

On the other hand, please refer to FIG. 3. FIG. 3 is a graph showing normalized reflected light intensity and time of another sensing signal obtained by the gesture sensing module according to the embodiment of the present invention. The vertical axis and the horizontal axis in FIG. 3 are the same units as the vertical axis and the horizontal axis in FIG. 2D, and thus will not be described again. As illustrated in FIG. 3, when the target 18 is moved in the second direction from the right side of the sensing region 20, that is, the traveling direction is the second direction, at this time, the light emitting unit 10 does not illuminate the target first. Matter 18, but when the target 18 is close When the left side of the area 20 is measured, the light-emitting unit 10 is irradiated to the object 18, and the reflected light of the reflected beam is more and more, so that the light sensor 12 receives the reflected light of the reflected beam. Therefore, as shown by the curve C300 in FIG. 3, the rising edge time of the sensing signal is short, and when the target 18 is closer to the left side of the sensing region 20, the falling edge time of the sensing signal is longer.

Therefore, the control circuit 14 can determine the traveling direction of the target 18 by the ratio of the rising edge time to the slope of the falling edge time, the luminance product value, or the ratio of the rising edge time to the falling edge time according to the above manner. . For example, when the slope of the sensing signal at the rising edge time is greater than the slope of the sensing signal at the falling edge time, the control circuit 14 determines that the traveling direction of the target 18 is from the second direction. Alternatively, when the luminance product value of the sensing signal at the rising edge time is less than the luminance product value of the sensing signal at the falling edge time, it is determined that the traveling direction of the target 18 is the second direction. Alternatively, when the ratio of the rising edge time to the falling edge time is less than 1, it is determined that the traveling direction of the target 18 is the second direction.

It should be noted here that, in the above embodiment, only the control circuit 14 can determine whether the traveling mode of the target 18 is the first direction or the second direction by the rising edge time and the falling edge time of the sensing signal. However, as shown in FIG. 2B, the gesture sensing module 1 of the embodiment of the present invention can also determine that the traveling direction of the target 18 is the third direction (from top to bottom) by the rising edge time and the falling edge time of the sensing signal. ) or the fourth direction (from bottom to top). In summary, the invention is not limited thereto.

It should be noted that the above embodiment is only one aspect of the embodiment of the present invention, and the present invention is not limited to the above embodiment. 4A-4D, FIG. 4A is a schematic diagram of operation of a gesture sensing module according to another embodiment of the present invention, and FIG. 4B is a schematic diagram of a sensing area of the gesture sensing module of FIG. 4A, and FIG. 4A is a graph of the normalized reflected light intensity and time of the sensing signal obtained by the gesture sensing module of FIG. 4A, and FIG. 4D is a normalized sensing signal obtained by the gesture sensing module according to another embodiment of the present invention. A plot of reflected light intensity versus time. The gesture sensing module 1a in FIG. 4A is similar in structure to the gesture sensing module 1 in FIG. 2A, and the following will be two The same elements are included in the same reference numerals. In addition, the vertical axis and the horizontal axis in FIG. 4C are the same units as the vertical axis and the horizontal axis in FIGS. 2D and 3, and thus will not be described again. The difference between the gesture sensing modules 1a and 1 is that the light emitting unit 10 of the gesture sensing module 1a provides a light beam having a positive inclination of 20 degrees for being illuminated in the sensing region 20. In other words, the light unit 10 forms a light spot 22' offset to the right within the sensing region 20 (as shown in Fig. 4B).

It should be noted that, in this embodiment, the control circuit 14 of the gesture sensing module 1a and the control circuit 14 of the gesture sensing module 1 determine the traveling direction of the target 18 in the same manner. Therefore, those skilled in the art can refer to the embodiment of the gesture sensing module and the difference, and it should be easily inferred that the control circuit 14 can calculate the slope and luminance product of the rising edge time and the falling edge time according to the sensing signal. The value or the ratio of the rising edge time to the falling edge time determines the traveling direction of the target 18, and therefore will not be described herein.

Please refer to FIG. 5. FIG. 5 is a schematic diagram of operation of a gesture sensing module according to another embodiment of the present invention. The gesture sensing module 1b in FIG. 5 is similar in structure to the gesture sensing module 1 in FIG. 2A, and the same components included in the following are denoted by the same reference numerals. The difference between the gesture sensing modules 1b, 1 is that the base 2' of the gesture sensing module 1b has an inclined surface, and the light emitting unit 10 is disposed on the inclined surface, so that the central optical axis C_AXIS of the light beam emitted by the light emitting unit 10 The angle γ formed with the normal vector N_VEC of the substrate 2' is not zero. In other words, in the embodiment, the light emitting unit 10 can be disposed on the inclined surface to provide a light beam having an inclination (for example, a positive inclination of 20 degrees and a negative 20 degrees) to be irradiated into the sensing region 20, so that The control circuit 14 can sense the slope of the rising edge time and the falling edge time, the luminance product value or the rising edge time of the sensing signal generated by the reflected signal generated by the target 18 reflecting the light beam emitted by the light emitting unit 10 according to the light sensor 12 . The direction of travel of the target 18 is judged by the ratio of the falling edge time.

In addition to the above differences, those skilled in the art should know that the operation mode of the gesture sensing module of this embodiment is different from the gesture sensing mode of the above embodiment. The group operation mode is similar, and those skilled in the art can refer to the gesture sensing module of the above embodiment and the difference, and should be easily inferred, and therefore will not be described herein.

Based on the above, the light-emitting unit 10 of the gesture sensing module 1 of the embodiment of the present invention can emit an illumination sensing region 20 of a light beam whose central optical axis C_AXIS is inclined to the normal vector N_VEC of the substrate 2. Since the light beam emitted by the light emitting unit 10 is not irradiated on the center point C_P of the sensing region 20, the control circuit 14 can transmit the reflected light of the light beam emitted by the light emitting unit 10 by the target 18 through the light sensor 12, The direction of travel of the target 18 is determined based on the slope of the rising edge time and the falling edge time, the luminance product value, or the ratio of the rising edge time to the falling edge time of the generated sensing signal.

In short, the gesture sensing module 1 of the embodiment of the present invention can directly determine the operation instruction of the user through the change of the light intensity reflected by the target 18 during the sensing time, thereby reducing the calculation amount of the back-end circuit operation. . In addition, since the user can operate the electronic device without touching the electronic device of the gesture sensing module 1, the user's operational flexibility is further improved.

[Another Embodiment of Gesture Sensing Module]

Please refer to FIG. 6. FIG. 6 is a schematic diagram of a sensing area of a gesture sensing module according to another embodiment of the present invention. In the present embodiment, the gesture sensing module (not shown) is similar in structure to the gesture sensing module 1 in FIG. 2A, and the same components that are included in the following are denoted by the same reference numerals. The difference between the gesture sensing module (not shown) of the present embodiment and the gesture sensing module 1 of the above embodiment is that the gesture sensing module (not shown) of the embodiment has two light emitting units ( FIG. 6 shows that two light beams having inclinations are respectively irradiated into a sensing region 20, and as shown in FIG. 6, two light spots 52 and 54 are formed in the sensing region 20, respectively, and offset from the center point of the sensing region 20. C_P.

Therefore, in the present embodiment, the control circuit 14 can not only determine the slope of the rising edge time and the falling edge time, the luminance product value or the rising edge time and the falling time of the sensing signal generated by the reflected light of the target point 18 reflected by the light spot 52. Judging the ratio of the ratio of time The traveling direction of the target 18 is the first direction or the second direction, and the control circuit 14 can also detect the slope of the rising edge time and the falling edge time and the luminance product according to the sensing signal generated by the reflected light of the object 54 reflected by the object 18. The value or the ratio of the rising edge time to the falling edge time is used to judge whether the traveling direction of the target 18 is the third direction or the fourth direction.

In this embodiment, the gesture sensing module (not shown) has two illumination units (not shown) that respectively provide two beams with tilts to illuminate the sensing region 20. However, in other embodiments, the gesture sensing module can also have three lighting units or four lighting units. The invention does not limit the number of light emitting units.

In addition to the above differences, the control circuit 14 of the gesture sensing module (not shown) of the present embodiment is the same as the control circuit 14 of the gesture sensing module 1 of the above embodiment for determining the traveling direction of the object 18. Therefore, those skilled in the art having reference to the gesture sensing module of the above embodiment and the above differences should be easily inferred, and therefore will not be described herein. In another aspect, the invention also does not limit the number of light sensors. In other embodiments, the gesture sensing module can have more than one photo sensor. By providing a plurality of light sensors in conjunction with an appropriate algorithm, the control circuit can improve the accuracy of determining the direction of travel of the target.

[Embodiment of Electronic Device]

Please refer to FIG. 7. FIG. 7 is a schematic diagram of an electronic device according to an embodiment of the present invention. The gesture sensing module 1 described above can be directly applied to the electronic device 60, but the application is not intended to limit the present invention. The electronic device 60 generally includes a gesture sensing module 1 and a processing unit (not shown), wherein the processing unit is coupled to the gesture sensing module 1 . The processing unit is configured to perform an operation of the application according to the direction of travel determined by the gesture sensing module 1 . In addition, the electronic device 60 may be, for example, a mobile phone, a tablet computer, or a notebook computer.

[Embodiment of gesture sensing method]

Referring to FIG. 8 and FIG. 2A, FIG. 8 is a flowchart of a gesture sensing method according to an embodiment of the present invention. In step S801, the light emitting unit 10 supplies a light beam to illuminate a sensing area 20, wherein the central optical axis C_AXIS of the light beam forms an angle γ with the normal vector N_VEC of the substrate 2. In this embodiment, the angle may be positive 20 degrees or negative 20 degrees. However, the embodiment is not limited. In other embodiments, those skilled in the art can design according to actual use. In other words, the light emitting unit 10 provides the light beam irradiation sensing region 20 having an inclination such that the light beam emitted from the light emitting unit 10 is not irradiated at the center position of the sensing region 20.

In step S803, the photo sensor 12 transmits the reflected light generated by the object 18 to reflect the light beam, and correspondingly generates a sensing signal. It is worth mentioning that the sensing signal represents the intensity variation of the reflected light generated by the object 18 reflecting the light beam at each time point. In step S805, the control circuit 14 determines the traveling direction of the object 18 based on the sensing signal. In step S807, the processing unit (not shown) can perform the operation of the application according to the determination result of the control circuit 14, for example, the screen flipping or zooming.

[Possible efficacy of the embodiment]

In summary, the gesture sensing module and method and the electronic device provided by the embodiments of the present invention can utilize at least one lighting unit and at least one sensor to sense the traveling direction of the target. Therefore, the gesture sensing module, the method and the electronic device thereof can determine a more diverse operation mode, thereby increasing the flexibility of the user operation and reducing the calculation amount of the back end circuit.

The above is only an embodiment of the present invention, and is not intended to limit the scope of the invention. It is still within the scope of patent protection of the present invention to make any substitutions and modifications of the modifications made by those skilled in the art without departing from the spirit and scope of the invention.

1‧‧‧ gesture sensing module

2‧‧‧Base

10‧‧‧Lighting unit

12‧‧‧Light sensor

15‧‧‧First optical lens

16‧‧‧Second optical lens

18‧‧‧ Targets

C_AXIS‧‧‧Central Optical Axis

N_VEC‧‧‧ normal vector

γ ‧‧‧ angle

Claims (9)

A gesture sensing module is disposed on a substrate, and includes: at least one light emitting unit, configured to provide a light beam, to illuminate a sensing area, wherein a central optical axis of the light beam forms an angle with a normal vector of the substrate, wherein the The angle is not zero; at least one light sensor is configured to sense a reflected light of a target reflected by the target in the sensing area, and generate a sensing signal according to the reflected light; and a control circuit coupled to the The light sensor and the light emitting unit determine a traveling direction of the target according to the sensing signal. The gesture sensing module of claim 1, wherein the control circuit determines the travel of the target according to a slope of the rising edge time of the sensing signal and a slope of the sensing signal at a falling edge time direction. The gesture sensing module of claim 1, wherein the control circuit determines the traveling direction of the target according to a ratio of a rising edge time of the sensing signal to a falling edge time. The gesture sensing module of claim 1, wherein the control circuit determines the target according to a luminance product value of the sensing signal at a rising edge time and a luminance product value of the sensing signal at a falling edge time. The direction of travel of the object. The gesture sensing module of claim 1, wherein the central optical axis of the beam forms an angle of 20 degrees or -20 degrees with a normal vector of the substrate. The gesture sensing module of claim 1, further comprising: a first optical lens disposed above the photo sensor, receiving the reflected light, and focusing the reflected light on the light sensing Device. The gesture sensing module of claim 1, wherein the photo sensor comprises at least one photo diode. The gesture sensing module of claim 1, further comprising: a second optical lens disposed above the light emitting unit, a center point of the orthographic projection of the second optical lens and a front projection of the light emitting unit The center point is not heavy The stacking causes the central optical axis of the beam to form an angle with the normal vector of the substrate that is not zero. The gesture sensing module of claim 1, wherein the substrate has an inclined surface, and the light emitting unit is disposed on the inclined surface such that the central optical axis of the light beam forms an angle with a normal vector of the substrate Not zero.