TW201305853A - Hybrid pointing device - Google Patents

Abstract

The present invention provides a hybrid pointing device including an optical navigation module and a pointing module. The optical navigation module is configured to replace the conventional buttons of a convention pointing device, such as an optical mouse or a trackball mouse. The optical navigation module is configured to sense gestures of at least one object operated by a user to activate commands associated with particular programs running on a host. Since the optical navigation module is only configured to sense gestures of the object but not the movement of the hybrid pointing device relative to a surface, the resolution thereof is aimed to be sufficiently high enough for sensing gestures and no need to be relatively high.

Description

Hybrid pointing device

The present invention relates to a hybrid pointing device, and more particularly to a hybrid pointing device including an optical navigation module for sensing at least one finger gesture and a pointing module for sensing the hybrid pointing device relative to Move on a surface.

In conventional pointing devices, such as an optical mouse and a roller mouse, one of the displays displayed on a host is directed to the index by a relative displacement between the pointing device and a surface. The pointing device typically includes two buttons (left and right) for initiating an instruction associated with the pointing indicator movement on the display. Generally, when a user wants to execute a program, drag a graphic, or modify a pattern, etc., the user moves the pointing indicator on the display and points the pointing indicator to a specific graphical user interface (GUI), and then at least One button to start the command. In order to improve the application of the conventional pointing device, some pointing devices are provided with more than two buttons. Thus, the user can define a particular function that is initiated by pressing an additional button or simultaneously pressing a plurality of buttons and moving the pointing indicator on the display.

However, since the user can only use up to five fingers to operate the button at the same time, setting too many buttons can cause user confusion. For example, when a user attempts to press a number of buttons, the user may have difficulty moving the pointing device to move the pointing indicator on the display. Another pointing device provides an optical sensing module to replace the conventional mouse. The optical sensing module is configured to emit light to a finger and receive light reflected by the finger to sense movement of the finger, thereby controlling a pointing indicator on the display. Such a pointing device is relatively small and the sensing area is relatively small, but it does have disadvantages such as low resolution, difficulty in accurately manipulating the pointing index, and difficulty in moving the pointing index quickly.

In addition, due to the unstable operation of the user's hand and fingers, the above-mentioned conventional mouse has difficulty controlling the direction of the pointing indicator to move in one direction, to move along a specific path, to draw a smooth arc, or to perform a correct fine movement.

In recent years, the industry has proposed a pointing device having a capacitive touch module (CTM) or a resistive touch module (RTM). The capacitive touch module or the resistive touch module is used to sense a touch action of a finger to initiate a command. In more detail, the capacitive touch module or the resistive touch module has a sensing array uniformly distributed on a sensing area. When the finger properly contacts the sensing area, the touch action will cause an electrical change of the sensing array to indicate the contact position on the sensing array. However, in order to ensure that the finger can be detected correctly, the entire capacitive touch module or resistive touch module must maintain normal operation. Once a part of the capacitive touch module or the resistive touch module does not function properly, the movement of the finger cannot be correctly detected. Furthermore, the finger must have sufficient force to actually contact the capacitive touch module or the resistive touch module to be sensed by the pointing device. These features all limit the application of this technology.

In view of this, it is very important to propose a pointing device that can start commands in different ways without using a button and can be accurately moved to achieve more control.

The invention provides a hybrid pointing device comprising an optical navigation module and a pointing module. The pointing module is configured to sense movement of the hybrid pointing device relative to a surface to move a pointing indicator on a display. The optical navigation module is used to replace buttons of a conventional pointing device such as an optical mouse or a roller mouse, such as a left button, a right button, a scroll wheel, and the like. The optical navigation module is configured to sense a gesture of at least one finger of the user to initiate a command executed by a host to execute a specific program. Since the optical navigation module is only used to sense the gesture of the finger instead of the movement of the hybrid pointing device relative to the surface, the resolution of the optical navigation module can be sufficient to sense the gesture without being too high.

The invention further provides a hybrid pointing device comprising an optical navigation module and a pointing module. The optical navigation module is used to assist the mobile pointing indicator to be closer to the user's needs. By sensing a specific gesture of at least one finger, the optical navigation module can be used to activate a command to limit the direction of movement of the pointing indicator, thereby moving the pointing indicator on the display or scrolling the page up and down, scrolling the page left and right, and the like. Thus, the user can more accurately manipulate the pointing indicator to move in the desired direction than the conventional pointing device. In addition, by sensing a specific gesture of at least one finger, the optical navigation module can be used to directly move the pointing indicator, move the pointing indicator on the display at a relatively high speed, or cooperate with at least one button on a keyboard to be directly within a limited range. Move to metrics or scroll pages at different speeds and more.

Since the optical navigation module can be operated in various ways, such as sliding at least one finger, performing a gesture, multi-finger touch, clicking with at least one finger, and drawing a circle with at least one finger, compared to a conventional pointing device The user can only choose to press or not press the button on the button to initiate the command. The optical navigation module of the present invention can provide a more intuitive method to manipulate the pointing indicator on the display or the screen on the screen.

The optical navigation module of the present invention comprises at least one image sensor and at least one light source. The light source emits light and a user operates at least one object to reflect light emitted by the light source to be received by the image sensor. Since the different gestures of the object will form different images on the image sensor, the optical navigation module then converts the image into an electrical signal to control the pointing indicator on a display or to initiate a specific program executed by a host.

The hybrid pointing device of the present invention is for a user to operate on a surface. The hybrid pointing device includes a first module, a second module, and a processor. The first module is configured to sense movement of the hybrid pointing device relative to the surface. The second module includes a light source and an image sensor. The light source is used to emit light. The image sensor is configured to capture an image of at least one spot including at least one object operated by the user to reflect light emitted by the light source. The processor is configured to recognize the gesture of the object according to the location information of the spot in the image.

In an embodiment of the present invention, the position information of the light spot in the image is captured by a lookup table formed by a matrix dividing the angle of view of the image sensor into a plurality of sub-areas and Pre-stored in the processor.

The present invention can be integrated into a conventional optical mouse or roller mouse structure by incorporating the optical navigation module of the present invention and changing related peripheral devices. In one embodiment, the first module and the second module included in the hybrid pointing device can share the same light source.

The above and other objects, features, and advantages of the present invention will become more apparent from the accompanying drawings.

In the following description, a hybrid pointing device of the present invention will be described by way of an embodiment, which has an optical navigation module instead of a conventional pointing device having a button. However, embodiments of the invention are not limited to any particular environment, application, or implementation. The following examples are merely illustrative and are not intended to limit the invention. It is to be understood that components that are not directly related to the present invention have been omitted and are not shown in the following embodiments and illustrations.

Several examples of the invention are shown in the following figures, which are similar to conventional mice. That is, the following hybrid pointing device of the present invention is for placing on a smooth working surface, and the hybrid pointing device includes a pointing module for emitting light to the working surface and receiving light reflected from the working surface. Control is displayed on the display of a host pointing to the movement of the indicator. In other embodiments, the pointing module can be replaced by other devices, such as a scroll wheel pointing module. The function of the conventional pointing module can be understood by those skilled in the art to which the present invention pertains, and therefore will not be described again in the following description.

Fig. 1 is a top view showing the hybrid pointing device of the first embodiment of the present invention. The hybrid pointing device 10 includes an optical navigation module having two image sensors 101 and 103, a light source 105, and a processor 109. The processor 109 is electrically connected to the image sensors 101 and 103 and the light source 105. It should be noted that the number of the light source and the image sensor is not intended to limit the invention. In this embodiment, the processor 109 can also be electrically connected to the pointing module 108 (as shown in FIG. 2) for processing data transmitted from the module. However, in other embodiments, the pointing module 108 can additionally include a separately functioning processor. The image sensor is configured to optically cover an operating region 107 of the hybrid pointing device 10. In this embodiment, the image sensors 101 and 103 are used to optically cover the operation area 107 as shown in FIG. 2, wherein FIG. 2 is the AA ' line in the hybrid pointing device 10 of FIG. Cutaway view. It should be noted that only the schematic diagram for explaining the processor 109 is shown in FIG. The image sensors 101 and 103 are disposed relative to the light source 105. Therefore, the image sensors 101 and 103 can receive the light emitted by the light source 105. The operation area 107 of the first embodiment is an inclined surface on which a user can place a finger and move the finger. In other embodiments, the operation area 107 may also be disposed in a vertical or concave shape as long as the operation area 107 does not block the image sensors 101 and 103 from receiving the light emitted by the light source 105. In other embodiments, as long as the viewing angles of the image sensors 101 and 103 can cover the light source 105, the image sensors 101 and 103 and the light source 105 can be disposed at different positions. As shown in FIG. 2, the light source 105 can be illuminated by a light source of the pointing module 108 through a specific light guiding structure; that is, the optical navigation module and the pointing module 108 use the same light source. In other embodiments, the light source 105 can be an independent light source outside the pointing module 108.

In particular, the relative position between the light source 105 and the image sensors 101 and 103 is limited by the angle of view of the image sensor and the angle of illumination of the light source. The angle of illumination of a light source refers to the range of angles at which light emitted by the source can be illuminated. In general, an image sensor has a range of viewing angles to define the maximum range that it can sense. For example, the image sensor 101 has a viewing angle range of approximately 90 degrees, which is represented by two arrows 1011 and 1012. The arrows 1011 and 1012 display two boundaries of the viewing angle range, and the image sensor 101 cannot sense objects located outside the viewing angle range. Similarly, the image sensor 103 can have a viewing angle range of 90 degrees, which is represented by two other arrows 1031 and 1032. In the first embodiment, the image sensors 101 and 103 each have a viewing angle range covering the illumination angle of the light source 105. In other embodiments, the light source 105 can be replaced by a line of light sources, such as one of the light strips that emit substantially parallel light.

When a user places at least one finger on the operation area 107, the finger shields the light emitted by the light source 105 and forms at least one shadow on the image sensors 101 and 103. Please refer to FIGS. 3a and 3b, which show a schematic diagram of one of the image sensors 101 and 103 respectively sensing the shadow. In this embodiment, the image sensors 101 and 103 are line image sensors, and the fingers respectively form a shadow light 301 and 303 in the images. The images are images captured by the image sensors 101 and 103, respectively. Each image displays a range of values to indicate the projected position between the two boundaries of the range of viewing angles of each image sensor. In one embodiment, for example, each image sensor has a numerical range of 0 to 255. When a user places at least one finger on the operation area 107, the finger blocks the light emitted by the light source and forms a shadow light 301 and 303 on the image sensors 101 and 103, respectively. As shown in Figures 3a and 3b, the masking light 301 has, for example, a value of 120 and the masking light 303 has a value of 200, for example. It can be appreciated that the user can also use other items, such as a stylus, a touch bar or the like, to operate in the operating area 107 instead of using the fingers described in the various embodiments of the present invention.

A virtual line 111 can be drawn through the image sensor 101 and the contact finger position 115 and a virtual line 113 is drawn through the image sensor 103 and the contact finger position 115. The positions of the image sensors 101 and 103 can be mapped to two sets of coordinate values of any conventional coordinate system, such as a polar coordinate system or a right angle coordinate system. Next, the processor 109 maps two values, such as 120 and 200, into a set of coordinate values, i.e., a contact coordinate value, based on the same coordinate system, and obtains two equations from the virtual lines 111 and 113. By solving the two equations, the processor 109 can know the position 115 of the contacted finger at the operating region 107. As the touching finger moves, the processor can track the finger by continuously finding different positions of the contacted finger. Once the contact finger leaves the operating area 107, the processor 109 can also detect a rapid change due to the disappearance of the contact coordinate value.

In other embodiments, when the image sensor 101 is arranged to be placed on the operating area 107, the finger can reflect the light emitted by the light source 105 and be received by the image sensor 101 for image sensing. A bright spot is formed on the device 101. Since the relative position of the light source 105 and the operation area 107 is determined in advance, the distance between the finger and the light source 105 can be known by tracking the change of the bright spot of the image formed by the image sensor 101 to track the finger movement. The time varies with respect to the distance between the light sources 105. For example, when the bright spot is brighter, it means that the finger is closer to the light source. When the bright spot is darker, it means that the finger is far away from the light source. For example, when the bright spot is large, the finger is far away from the light source, and the bright spot is smaller. When the finger is located closer to the light source, the bright spot range is determined according to the brightness of the pixel of the image sensor, and the bright spot range includes pixels whose brightness exceeds a predetermined value.

For another example, when the pointing device has an operation plane for the user to use the finger on the operation plane, since the relative position of the light source 105 and the image sensor 101 is fixed, and the finger is also limited to move on the operation plane. Therefore, when the relative distance or relative angle of the finger and the light source 105 is changed, the imaging position on the image sensor 101 is also different, and the processor is based on the bright spot position, the triangle formed by the light source and the object, and the bright spot position. Calculate the distance between the object and the light source.

The aforementioned distance change can be used to trigger a relative command, such as the function of a scroll wheel that can be used in place of the scroll wheel, to control scrolling up and down and left and right scrolling of the window.

Once the optical navigation module is capable of tracking the movement of at least one finger, the tracking data can be used to initiate a specific command. For example, if the contacted finger moves to the right, the optical navigation module can retrieve the tracking data and initiate an instruction to scroll the current picture; if the two touching fingers are away from or close to each other, the tracking data can be used to initiate zooming in or out. A command for a picture or pattern; if at least one of the touching fingers moves clockwise or counterclockwise, the tracking data can be used to rotate the current picture or picture. Furthermore, the user can set a desired command according to the specific action of the finger.

Figure 4 is a top plan view of the hybrid pointing device 40 of the second embodiment of the present invention. The main difference between the first and second embodiments is that the second embodiment uses only one image sensor 401 with a reflective element 406 and two line sources 403 and 405. In other embodiments, the line sources 403 and 405 can be formed as a single line source and the reflective element 406 can extend a suitable length in different directions within the viewing angle of the image sensor 401, for example, extending to the 4th. The opposite side of the source 405 is shown. The reflective element 406 can also be comprised of a plurality of mirrors. In other embodiments, one of the line sources 403 and 405 can be an active light source for illumination and the other line source can be a passive light source, such as a reflective cloth, to reflect light emitted by the active light source. It can be understood that when a finger touches a position 421 on the operating area 407, a position 421 is mirrored symmetrically with respect to the reflecting element 406 at the position 423. A contact finger will form two shadows on the image sensor 401 (one of which is formed by the reflected light that shields the reflective element 406 and the other that is the position 421 is mapped to the mirror of the reflective element 406) Two values are generated, and then the processor 409 maps the two values to coordinate values. As described above, the position of the image sensor 401 can also map a target value. By solving the equation determined by these coordinate values, the processor 409 can know the position of the contact finger.

Fig. 5 is a view showing a hybrid pointing device 50 of a third embodiment of the present invention. The hybrid pointing device 50 includes an image sensor 501, a light source 505, and a processor 509 electrically coupled to the image sensor 501, the light source 505, and a pointing module 508. It should be noted that the number of the light source and image sensor is not intended to limit the invention. The hybrid pointing device 50 further has an operating area 507 which is an upper surface of the touch panel for a user to place at least one finger and move the finger thereon. As shown in Fig. 5, the light source 505 emits light and the finger of the user reflects the light emitted by the light source. Then, the reflected light is received by the image sensor 501. The processor 509 can then recognize the position of the finger on the operating area 507 and continue to track the movement of the finger thereon. The tracking information is used to initiate specific commands as described in the first and second embodiments.

Moreover, since different actions of at least one finger gesture may form different images in the image sensor 501, the user may initiate a command through different gestures of at least one finger in the image recognition technology. When there is no finger on the operation area 507, the light emitted by the light source 50 will be emitted outward and the image sensor 501 cannot sense the light reflected from the operation area 507; that is, the touch panel is opposite to The light emitted by the light source 505 is transparent. When the user places at least one finger on the operation area 507, the light emitted by the light source 505 is reflected on the surface between the contact finger and the operation area 507 and is sensed by the image sensor 505. At least one light-changing spot is formed on the image. The processor 509 then converts the image into an electrical signal to control a pointing indicator displayed on a display or to initiate a particular program executed by a host.

Figure 6a shows a schematic view of a hybrid pointing device 60 in accordance with a fourth embodiment of the present invention. The hybrid pointing device 60 includes an image sensor 601 and a processor 609 electrically coupled to the image sensor 601 and a pointing module 608. When the ambient light is strong enough, the image sensor 601 directly senses the operation area 607 and the image sensor 601 can recognize at least one finger on the operation area 607 from the ambient light. It must be noted that the number of image sensors is not intended to limit the invention.

Fingers placed in the operating area 607 will produce shadows of different shapes. The shadow is then sensed by the image sensor 601. The processor 609 can then recognize the position of the finger on the operating area 607 and continue to track the movement of the finger thereon. Tracking information is used to initiate specific commands as in the first and second embodiments described above. Moreover, since different actions of at least one finger gesture may form different images in the image sensor 601, the user may initiate a command through different gestures of at least one finger. The processor 609 can be used to identify images caused by different gestures by using the image recognition technology according to the third embodiment. Since the image sensing 601 is configured to sense the shadow of the contacted finger to shield the ambient light, the touch panel may also be formed with a plurality of through holes as shown in FIG. 6b, whereby the processor 609 can be based on the contacted finger. The shaded through hole identifies the position of the finger on the operating area 607 and continues to track the movement of the finger on the operating area 607. It will be appreciated that the shape and density of the through holes shown in Figure 6b are not intended to limit the invention.

In other embodiments, the operating areas 507 and 607 can have a light guiding unit for directing light to the entire operating area. For example, in FIG. 5, the light source 505 can be reset to one end of the operation area 507 having the light guiding unit, and the light emitted by the light guiding unit can travel along the operation area 507 through the guiding of the light guiding unit. The image sensor 501 then senses an image of the operational region 507 whose brightness is evenly distributed. When the user places at least one finger on the operating area 507, the contacted finger will change the light intensity and the sensed image will have at least one shaded shadow caused by the contacted finger. The processor 509 can be used to identify the sensed image through the image recognition technology according to the third embodiment. In FIG. 6a, the operation area 607 can have a light guiding unit for guiding ambient light or an auxiliary light source to the entire operation area 607, and then the image sensor 601 is used for the image sensor 501 as described above. Operation.

Since the optical navigation module of the present invention is used to sense the gesture or movement of the user's finger, the resolution of the image sensor of the optical navigation module in the above embodiments may not be like the image sense of the pointing module. The resolution of the detector is so high. In particular, the resolution of the image sensor of the optical navigation module can be as long as it can sense at least one finger gesture or movement without being able to sense the details of the finger surface, such as a fingerprint. In other words, as long as the image sensor of the optical navigation module can sense the outline of the finger, the resolution is sufficient. Embodiments of the image sensor include a CCD image sensor, a CMOS image sensor, or the like.

In addition, the hybrid pointing device may further include a transmission interface unit for transmitting the motion sensed by the pointing module to a display to move a pointing indicator on the display, and transmitting a command recognized by the processor relative to the finger gesture. To start a specific program executed by a host or directly move the pointing indicator on the display.

The operation area of each of the above embodiments can be divided into a plurality of sub-areas according to the coordinate system applied by the optical navigation module. Taking a rectangular coordinate system as an example, please refer to FIG. 7 , which shows a schematic diagram of a matrix in which an operation area is divided into a plurality of sub-areas. It is assumed that the contacted finger occupies position 71 of the operating area and then moves to position 72. The optical navigation module only needs to continuously sense which sub-area is touched by the finger to calculate the movement of the contacted finger, and then initiate a specific command to move back. Even when the contact finger moves, the optical navigation module can sense only the starting point and the ending point to capture the moving direction of the contact finger, and then activate a specific command in response to the moving information of the contacted finger.

When the finger touches more than one sub-region at the same time, as shown in FIG. 7 at positions 71 and 71 ′ , the optical navigation module can estimate position information by using several methods, for example, averaging the relative values of the two sub-regions, The two sub-regions together serve as a starting point, select one of the sub-regions in which the contacted finger occupies the most, and randomly select one of the sub-regions to be contacted, etc., but the present invention is not limited thereto. At the same time, the optical navigation module can pre-store the location information of each sub-area, for example, store the location information in a look-up table and store it in a memory device, and then take the previously stored location information to improve processing when the finger touches the operation area. speed. Since the main purpose of the optical navigation module is to determine the gesture or movement of the finger, as long as the optical navigation module uses the same method to estimate the position information, the output of the optical navigation module can be used to determine the gesture or movement of the finger.

The above light source may be any conventional light source such as a light emitting diode, a laser diode or an infrared light source, but the present invention is not limited thereto. The advantage of using an infrared light source is to take advantage of its invisible features to avoid affecting the user's vision. Tracking information captured from the movement of the contacted finger can also be used to assist in pointing indicators on the mobile display. For example, when the optical navigation module detects that the moving direction of the contact finger is the same as the moving direction of the pointing module, for example, the contact finger moves to the left and the pointing module moves to the left to point to the index, the pointing indicator can accelerate to the left. . Alternatively, the optical navigation module can temporarily control the movement of the pointing indicator by moving at least one finger on the operating area after detecting a specific gesture with or without at least one button on the keyboard. The operation area and/or the image sensor of each of the above embodiments may be disposed to have an inclination angle for facilitating placement of a finger and easy sensing of an image.

As described above, the pointing device having the optical sensing module has a problem that it is difficult to accurately control the pointing index and it is difficult to move the pointing index at a high speed. Moreover, it is known that a pointing device having a capacitive touch module or a resistive touch module must operate with a large pressure rail and must be maintained in a good condition. Accordingly, the present invention provides a hybrid pointing device that has a multi-finger touch function and is more intuitive than conventional pointing devices, and that accurately operates a pointing indicator along a desired direction and path. Furthermore, since the optical navigation module of the present invention is used to sense the gesture or movement of the user's finger, the resolution of the image sensor of the optical navigation module in the above embodiments may be lower than the image sense of the pointing module. The resolution of the detector.

The present invention has been disclosed in the foregoing embodiments, and is not intended to limit the present invention. Any of the ordinary skill in the art to which the invention pertains can be modified and modified without departing from the spirit and scope of the invention. . Therefore, the scope of the invention is defined by the scope of the appended claims.

10, 40, 50, 60. . . Hybrid pointing device

101, 103, 401, 501, 601. . . Image sensor

1011, 1012, 1031, 1032. . . Boundary of perspective

105, 403, 405, 505. . . light source

107, 407, 507, 607. . . Operating area

108, 508, 608. . . Pointing module

109, 409, 509, 609. . . processor

111, 113. . . Virtual line

115. . . Finger position

301, 303. . . Shading light and shadow

406. . . Reflective element

421. . . Finger position

423. . . Finger mirror

71, 71 ' , 72. . . Finger position

Fig. 1 is a top view showing the hybrid pointing device of the first embodiment of the present invention.

Fig. 2 is a cross-sectional view taken along line AA ' in Fig. 1.

Fig. 3a-3b shows a schematic diagram of the image sensor of Fig. 1 capturing an image containing a shadow.

Fig. 4 is a top plan view showing the hybrid pointing device of the second embodiment of the present invention.

Fig. 5 is a view showing a hybrid pointing device of a third embodiment of the present invention.

Fig. 6a is a view showing the hybrid pointing device of the fourth embodiment of the present invention.

FIG. 6b is a schematic view showing a touch panel of the hybrid pointing device according to the fourth embodiment of the present invention, wherein the touch panel has a plurality of through holes.

Fig. 7 is a diagram showing a matrix in which an operation area is divided into a plurality of sub-areas.

1. . . Hybrid pointing device

101. . . Image sensor

105. . . light source

107. . . Operating area

108. . . Pointing module

109. . . processor

Claims (12)

a pointing device for a user to operate relative to a surface, the pointing device comprising: a first module for sensing movement of the pointing device relative to one of the surfaces; a second mode The group includes: a light source for emitting light; and an image sensor for capturing an image of at least one spot including at least one object operated by the user to reflect light emitted by the light source; and a processing The device is configured to identify a relative distance between the object and the light source according to the change of the image of the spot in the image and generate a distance signal. The pointing device of claim 1, wherein the first module is an optical navigation module or a mechanical navigation module. The pointing device of claim 1, wherein the processor calculates the movement sensed by the first module. The pointing device of claim 1, wherein the processor identifies the relative distance between the object and the light source according to the brightness of the image of the light spot, and when the brightness of the image of the light spot increases, represents the object The relative distance from the light source is shortened, and when the brightness of the image of the light spot is reduced, the relative distance between the object and the light source is increased. The pointing device of claim 1, wherein the processor identifies a relative distance between the object and the light source according to a bright spot range of the image of the light spot, and when the bright spot of the image of the light spot is reduced, The relative distance between the object and the light source is shortened, and when the bright spot range of the image of the light spot increases, the relative distance between the object and the light source increases, and the bright spot range is determined according to the brightness of the pixel of the image sensor, and the bright spot is determined. The range contains pixels whose brightness exceeds a predetermined value. The pointing device of claim 1 further has an operation plane for the user to use the object on the operation plane, wherein the processor is located within the image range according to the bright spot of the image of the light spot. Changing the relative distance of the object from the light source by fixing the relative position of the image sensor to the light source and limiting the use of the object on the operation plane, the processor according to the bright spot position, the light source and the The triangle formed by the object is calculated from the position of the bright spot to obtain the distance between the object and the light source. The pointing device of claim 1, wherein the second module is a distance measuring sensor (DMS) module. The pointing device of claim 1, wherein the second module is a Proximity Sensor module. The pointing device of claim 1, wherein the second module further has another light source, so that an object forms at least two light spot images on the image sensor. The pointing device of claim 1, wherein the second module further has another light source and a corresponding image sensor, such that an object forms a light on each of the image sensors. Point image. The pointing device of claim 1, wherein the second module further has a blocking component to limit the light emitted by the light source from being directly received by the image sensor. The pointing device of claim 1, wherein the distance signal is used to control a relative command to control scrolling of a window on a screen.