CN103970292B - Optical pointing device and judging method thereof - Google Patents

Abstract

The invention relates to an optical pointing device and a judgment method thereof, which can be used for measuring the pointing direction of a finger of a user. The optical pointing device includes: a cover body, a light source and a sensor. The cover body is provided with a pressing part and a side wall, the pressing part is provided with a first surface and a second surface opposite to the first surface, and the side wall extends downwards from the periphery of the second surface. The light source is used for providing a main light beam, and the main light beam is suitable for being emitted to the pressing part of the cover body so as to form a first light beam penetrating through the pressing part and a second light beam reflected by the second surface. The sensor is suitable for receiving the second light beam reflected by the second surface, and judges the second light beam by using an algorithm so as to output a first displacement coordinate. Wherein, the light source and the sensor are covered by the cover body, and the side wall is a flexible side wall. By the invention, a user can relatively obtain corresponding feedback force during operation, the cursor can be more accurately positioned, and a more intuitive operation mode is provided.

Description

Optical pointing device and judging method thereof

technical field

The present invention relates to an optical pointing device and its judging method; in particular, it relates to an optical pointing device used on a digital mobile device and its judging method.

Background technique

Compared with traditional desktop computers, digital mobile devices, such as notebook computers, have become the first choice for most people when purchasing computer products because of their portability and performance, which can gradually compete with desktop computers. first choice.

However, due to the consideration of portability, most notebook computers only use the keyboard for text input as the basic equipment, and replace the traditional mouse with a touchpad, which makes the operation of the cursor unintuitive and difficult to use. It is also less suitable for dragging and dropping objects.

Although some types of notebook computers are equipped with a cursor pointing key in the keyboard input area in an attempt to allow users to perform faster cursor operations, the cursor pointing key uses mechanism movement and pressure sensing, so Although it can provide the user with a moving feeling in operation, it is still difficult to give a quick and immediate response in use.

Except aforementioned notebook computer, other types of digital mobile devices, such as mobile phones, are limited by the screen size and the configuration of the key input area, so even if similar to the aforementioned cursor pointing keys can be installed, due to the lack of mechanism movement and Pressure-sensing components make such products not only lack the feeling of movement, but also make it difficult to give a quick and immediate response in use.

In view of this, how to provide an optical pointing device with a mobile feel and a fast and immediate response and a judging method thereof is an urgent problem to be solved in the industry.

Contents of the invention

An object of the present invention is to provide an optical pointing device, which can be used to provide a moving feel so that the user can relatively obtain corresponding feedback force during operation.

Another object of the present invention is to provide a judging method for an optical pointing device, which can still perform phase detection to move the cursor when the user's finger is pushed and held in a fixed direction.

To achieve the above purpose, the optical pointing device of the present invention includes a cover, a light source and a sensor. The cover body has a pressing portion and a side wall, the pressing portion has a first surface and a second surface opposite to the first surface, and the side wall extends downward from the periphery of the second surface. The light source is used to provide a main light beam, which can be emitted to the pressing part of the cover to form a first light beam penetrating the pressing part and a second light beam reflected by the second surface. The sensor is adapted to receive the second light beam reflected by the second surface, and use an algorithm to judge the second light beam to output a first displacement coordinate. Wherein, the light source and the sensor are covered by the cover body, and the side wall is a flexible side wall.

The beneficial effect of the present invention is that: through the present invention, the user can relatively obtain corresponding feedback force during operation, more precisely position the cursor, and provide a more intuitive operation mode.

In order to make the above objects, technical features, and advantages more comprehensible, preferred embodiments are described below in detail with the accompanying drawings.

Description of drawings

1 is a cross-sectional view of the optical pointing device of the present invention in contact with a finger and not being pushed;

2 is a cross-sectional view of the optical pointing device of the present invention in contact with and pushed by a finger; and

FIG. 3 is a step diagram of the optical pointing judgment method of the present invention.

reference sign

100 optical pointing device

110 Cover

112 Press part

112a First surface

112b Second surface

114 side wall

120 light sources

122 main beam

122a First Beam

122b Second Beam

130 sensors

200 fingers

detailed description

As shown in FIG. 1 , an optical pointing device 100 of the present invention is used to measure the pointing of a finger 200 of a user, so as to provide a digital mobile device, such as a notebook computer or a mobile phone, to move a cursor on the screen.

As shown in the figure, the optical pointing device 100 of the present invention includes a cover 110 , a light source 120 and a sensor 130 . Wherein, the cover body 110 has a pressing portion 112 and a side wall 114, the pressing portion 112 has a first surface 112a and a second surface 112b opposite to the first surface 112a, and the side wall 114 extends from the periphery of the second surface 112b Extend down. The light source 120 is used to provide a main beam 122, the main beam 122 is suitable for emitting to the pressing portion 112 of the cover 110 to form a first beam 122a penetrating the pressing portion 112 and a second beam reflected by the second surface 112b 122b. It should be reminded that, for the convenience of description of the present invention, the sizes of the finger 200 and the optical pointing device 100 in the drawings are only for illustration, not to the scale of actual operation. Moreover, both the light source 120 and the sensor 130 are covered by the cover 110 , and the side wall 114 is a flexible side wall.

Please continue to refer to FIG. 2, when the user's finger 200 pushes the cover 110 to change the optical path of the second light beam 122b, the sensor 130 is suitable for receiving the second light beam 122b reflected by the second surface 112b, and uses a calculation method to judge the change of the second light beam 122b, so as to output a first displacement coordinate for the cursor to move.

At the same time, the aforementioned first light beam 122a is suitable for being reflected by a finger 200 of the user after penetrating the pressing portion 112, and the sensor 130 is suitable for receiving the first light beam 122a reflected by the finger 200, and using the The algorithm judges the first light beam 122a to output a second displacement coordinate. In this way, the sensor 130 can add the value of the second displacement coordinate on the basis of the movement of the first displacement coordinate for judgment, so as to obtain a more precise change of the cursor position.

In addition, since the side wall 114 of this case is a flexible side wall, when the user's finger 200 pushes the cover body 110 as shown in FIG. A resettable deformation is generated to form a moving feeling, so that the user can relatively obtain corresponding feedback force during operation.

In the present invention, the light source 120 is preferably an LED light source or an infrared light source, but it is not limited thereto. In addition, multiple patterns can be provided on the second surface 112b of the pressing part 112, so that the second surface 112b becomes a surface with patterns, so that the second light beam 122b reflected by the second surface 112b can produce significant bright and dark changes, When the assisting sensor 130 receives the second light beam 122b, an algorithm can be used to make a more accurate positioning judgment.

Preferably, the sidewall 114 is made of materials such as rubber, PU (polyurethane), so as to provide the flexibility required by the present invention, thereby producing repositionable deformation and moving feeling. In other words, those skilled in the art can form the sidewall 114 with different moving textures by mixing different proportions of materials such as rubber and PU, so that the cover 110 has different feedback forces for users to choose. On the other hand, the pressing portion 112 of the cover 110 is made of PC (Polycarbonate), PMMA (Polymethyl Methacrylate), ABS (acrylonitrile-butadiene-styrene copolymer, Acrylonitrile Butadiene Styrene) and other materials to provide an appropriate reflection/transmission interface for the main beam 122.

As shown in FIG. 3 , the present invention also provides a method for judging optical pointing, which has the following steps. First, as shown in step 301 and step 302 , after the light source 120 and the sensor 130 are provided, the cover 110 is provided to cover the light source 120 and the sensor 130 . Next, as shown in step 303, the light source 120 is used to emit the main beam 122 towards the pressing portion 112 of the cover 110, so that the main beam 122 forms a first beam 122a penetrating the pressing portion 112 and is the second surface of the pressing portion 112. The second light beam 122b reflected by 112b. Finally, as shown in step 304 and step 305, after the second light beam 122b reflected by the second surface 112b of the pressing part 112 is received by the sensor 130, an algorithm can be used to judge the second light beam 122b to output The first offset coordinate for cursor movement. Suitably, through the aforementioned steps, the method for judging the optical pointing of the present invention can be easily completed.

On the other hand, if the user's finger 200 is pushed in a fixed direction (such as only upward direction, or only downward direction), as shown in step 306, when the sensor 130 judges that the reflected When the second light beam 122b is in a fixed direction and has a fixed area (that is, the size of the area does not change), the first displacement coordinates are continuously output, so that the cursor can continuously move along the fixed direction.

In addition, the aforementioned judging method may further have the following steps. As shown in step 307, the user's finger 200 is made to reflect the first light beam 122a, and as shown in step 308, the sensor 130 is used to receive the first light beam 122a reflected by the finger 200, and as shown in step 309, the aforementioned The algorithm judges the first light beam 122a to output the second displacement coordinates. Therefore, since the sensor 130 can receive the second light beam 122b reflected from the second surface 112b of the pressing portion 112 and the first light beam 122a reflected from the finger 200 at the same time, the optical pointing method of the present invention can be used separately After the first displacement coordinate and the second displacement coordinate are calculated, a more precise positioning action is performed for the optical pointing device 100 to drive the cursor.

Similar to the above, if the user's finger 200 is pushed and held in a fixed direction, as described in step 310, when the sensor 130 determines that the reflected first light beam 122a is in a fixed direction and has a fixed area , the second displacement coordinates will be continuously output, so that the cursor can continue to move along the fixed direction.

To sum up, through the optical pointing device 100 disclosed in the present invention, when the user's finger 200 pushes the cover 110, due to the function of the flexible side wall 114, a moving feeling can be provided for the user to operate. The corresponding feedback strength can be obtained relatively. On the other hand, the method for judging the optical pointing disclosed by the present invention can also judge the first light beam 122a and the second light beam 122b through the aforementioned algorithm, so that the cursor can be positioned more precisely; and, when the user's finger When the 200 is pushed and held in a fixed direction, the sensor 130 will still perform phase detection to move the cursor, thereby providing a more intuitive operation mode.

The above-mentioned embodiments are only used to illustrate the implementation of the present invention and explain the technical features of the present invention, and are not intended to limit the scope of protection of the present invention. Any changes or equivalence arrangements that can be easily accomplished by those skilled in the art belong to the scope of the present invention, and the scope of protection of the present invention should be determined by the claims.

Claims (13)

1. An optical pointing device for measuring the pointing of a finger of a user, characterized in that the optical pointing device comprises: A cover body has a pressing portion and a side wall, the pressing portion has a first surface and a second surface opposite to the first surface, and the side wall extends from the periphery of the second surface to the down extension; A light source for providing a main light beam, the main light beam is emitted to the pressing portion of the cover to form a first light beam penetrating the pressing portion and a first light beam reflected by the second surface two beams; and a sensor, receiving the second light beam reflected by the second surface, and using an algorithm to judge the second light beam, so as to output a first displacement coordinate; Wherein, the light source and the sensor are covered by the cover body, and the side wall is a flexible side wall, which produces resettable deformation according to a horizontal movement of the pressing part. 2. The optical pointing device according to claim 1, wherein the first light beam penetrating the pressing part is reflected by the finger of the user, and the sensor receives the light as the finger The reflected first light beam. 3. The optical pointing device according to claim 2, wherein after the sensor receives the first light beam reflected by the finger, the algorithm is used to judge the first light beam to output a second displacement coordinate. 4. The optical pointing device according to claim 1, wherein the light source is an LED light source. 5. The optical pointing device according to claim 1, wherein the second surface is provided with a plurality of patterns. 6. The optical pointing device according to claim 1, wherein the side wall is mainly composed of rubber, polyurethane-based materials. 7. The optical pointing device according to claim 1, wherein the pressing part is mainly composed of polycarbonate, polymethyl methacrylate, or acrylonitrile-butadiene-styrene copolymer. 8. A method for judging optical pointing, measuring the pointing of a finger of a user, characterized in that the method for judging optical pointing comprises the following steps: (a) providing a light source and a sensor; (b) providing a cover to cover the light source and the sensor; (c) Utilize the light source to emit a main light beam toward a pressing portion of the cover, so that the main light beam forms a first light beam penetrating the pressing portion and a second light beam of the pressing portion; a second light beam reflected by the surface; (d) receiving, with the sensor, the second light beam reflected by the second surface of the pressing portion; and (e) using an algorithm to judge the second light beam to output a first displacement coordinate; wherein, the cover has a side wall, and the side wall is downward from the periphery of the second surface Extending, the side wall is a flexible side wall, and produces resettable deformation according to a horizontal movement of the pressing part. 9. The optical pointing determination method according to claim 8, wherein the optical pointing determination method further comprises the following steps: (f) When it is determined that the reflected second light beam is in a fixed direction and has a fixed area, continuously output the first displacement coordinates. 10. The optical pointing determination method according to claim 9, wherein the optical pointing determination method further comprises the following steps: (g) causing said finger of said user to reflect said first light beam; (h) receiving, with the sensor, the first light beam reflected by the finger; and (i) Using the algorithm to judge the first light beam to output a second displacement coordinate. 11. The optical pointing determination method according to claim 10, wherein the optical pointing determination method further comprises the following steps: (j) When it is determined that the reflected first light beam is in a fixed direction and has a fixed area, continuously output the second displacement coordinates. 12 . The optical pointing determination method according to claim 8 , wherein the pressing portion has a first surface opposite to the second surface, and the second surface is provided with a plurality of patterns. 13 . 13. The optical pointing determination method according to claim 8, characterized in that, the side wall is mainly composed of rubber and polyurethane-based materials.