Patent Application
20080185508
1. Field of the Invention
The present invention relates to an improved packaging module of an optical sensor, and more specifically to an improved packaging module of an optical sensor used in a mouse and packaged with a linear optical sensor, an illuminating unit, a first protective body and a second protective body, the components are combined integrally.
2. Description of the Prior Art
Referring to
The illuminating component 2a is fixed on the illuminating source fixing structure 3a and is connected electronically with the circuit board 1a by a conducting wire 20a. The optical sensor 4a is mounted on the circuit board 1a and is connected electronically with the circuit board 1a by two conducting wires 40a. The packaging cover 5a is used for packaging the optical sensor 4a and defines an aperture 50a. The imaging lens 6a is set on the packaging cover 5a corresponding to the aperture 50a and the optical sensor 4a.
The illuminating component 2a shines a beam of light L1 onto a piece of paper D, the beam of light L1 is scattered to form scattered light L2, the scattering light L2 penetrates the aperture 50a and the imaging lens 6a and is then shot at the optical sensor 4a. The paper D is sensed by the optical sensor 4a.
However, the optical sensor 4a, the packaging cover 5a and the imaging lens 6a are discrete in form, for assembling and process. The optical sensor 4a, the packaging cover 5a and the imaging lens 6a must be adjusted to cooperate at a certain specific optical angle, thus, the scattering light L2 can be shone onto the optical sensor 4a, and because the illuminating source fixing structure 3a and the optical sensor 4a are discrete components, the positions of the illuminating component 2a and the optical sensor 4a need to be adjusted accurately to make the optical sensor 4a sense the scattering light L2. Moreover, because the illuminating source fixing structure 3a and the packaging cover 5a are discrete components, the costs of the material are high.
Referring to
Referring to
Light shone from the LED unit 2b penetrates the first optical component 41b and scatters onto a plane. Next, the light is reflected to the second optical component 42b by the plane. Finally, the light penetrates the second optical component 42b and is received by the sensor unit 3b.
The shortcomings of the packaging module of the optical sensor of prior arts are:
1. The optical sensor 4a, the packaging cover 5a and the imaging lens 6a are discrete in form, thereby, the process is complicated, assembling is difficult, and adjustment of positions is difficult.
2. Package volume of the packaging cover 5a of the optical sensor 4a is large so that space taken up is also large. Therefore, the packaging module is large, which wastes a lot of space.
3. A large amount of material is used for the packaging module so costs are high.
4. The first optical component 41b and the second optical component 42b of the optical unit 4b and the cover 14b are assembled by a combining technique, so the process and structure are complicated and difficult.
Hence, the inventors of the present invention believe that these shortcomings above are able to be improved upon and suggest the present invention which is of a reasonable design and is an effective improvement based on deep research and thought.
An object of the present invention is to provide an improved packaging module of an optical sensor. The linear optical sensor, the illuminating unit, the first protective body and the second protective body are combined integrally, making the process of the packaging module easy, adjustment of the components of the optical sensor module can be achieved automatically in the assembly process, space taken up by the packaging module of the optical sensor is reduced, and thus, the volume of the packaging module is small.
To achieve the above-mentioned objects, an improved packaging module of an optical sensor is disclosed. The module comprises a circuit board and an optical sensor module mounted on the circuit board. The optical sensor module comprises a linear optical sensor connected electronically with the circuit board, an illuminating unit connected electronically with the circuit board, and a second protective body packaging the linear optical sensor. A first protective body covers the linear optical sensor and the illuminating unit. The second protective body defines a first aperture thereon corresponding to the linear optical sensor.
Furthermore, the first protective body defines a first light pipe set at the first aperture, and the first light pipe and the first protective body are formed integrally.
The linear optical sensor, the illuminating unit, the first protective body and the second protective body of the optical sensor module are combined integrally, which makes the process of the packaging module easy, adjustment of components of the optical sensor module is achieved automatically during the assembly process, space taken up by the packaging module of the optical sensor is reduced, and thus, the volume of the packaging module is smaller.
To achieve the above-mentioned objects, another improved packaging module of an optical sensor is disclosed. The module comprises a circuit board and an optical sensor module mounted on the circuit board. The optical sensor module comprises a linear optical sensor connected electronically with the circuit board, an illuminating unit connected electronically with the circuit board, and a second protective body packaging the linear optical sensor. A first protective body covers the linear optical sensor and the illuminating unit, the second protective body defines a first aperture thereon corresponding to the linear optical sensor and a second aperture thereon corresponding to the illuminating unit.
Furthermore, the first protective body defines a first light pipe set at the first aperture and a second light pipe set at the second aperture. The first light pipe and the second light pipe are formed integrally on the first protective body.
The linear optical sensor, the illuminating unit, the first protective body and the second protective body of the optical sensor module are combined integrally. This makes the processing of the packaging module easy, adjustment of components of the optical sensor module can be achieved automatically during the assembly process, and space taken up by the packaging module of the optical sensor is reduced. Thus, the volume of the packaging module is reduced.
To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings related to the present invention. However, the drawings are only to be used as references and explanations, and not to limit the present invention.
Referring to
The optical sensor module 2 is mounted on the circuit board 1 and includes a linear optical sensor 21 and an illuminating unit 22 connected electronically with the circuit board 1, and a second protective body 23 packaging the linear optical sensor 21. A first protective body 24 covers the linear optical sensor 21 and the illuminating unit 22. The second protective body 23 defines a first aperture 231 thereon corresponding to the linear optical sensor 21.
For the embodiment, the first protective body 24 includes a first light pipe 27 set at the first aperture 231 corresponding to the linear optical sensor 21. The first light pipe 27 and the first protective body 24 are formed integrally.
Thereby, the linear optical sensor 21, the illuminating unit 22, the second protective body 23 and the first protective body 24 are assembled via a combining technique, which simplifies the assembly process of the present invention. The components of the sensor module can be adjusted automatically, the amount of space required for the packaging module of the sensor is reduced, and thereby, the volume of the whole packaging module is reduced.
For the present invention, the illuminating unit 22 is an illuminating source, or, is an illuminating module assembled with an illuminating source and a lighting lens, or, is an LED or a laser source, and provides light to the linear optical sensor 21. The second protective body 23 is black or made of opaque plastic so as to ensure that the linear optical sensor 21 avoids unnecessary contact with light which may result in negative effects. The plastic may be Epoxy or Polycarb, and the first protective body 24 may be made of transparent material or transparent plastic which prevents the linear optical sensor 21 from directly contacting impurities, in which such contact may cause malfunctions. Moreover, the first protective body 24 may be made of Epoxy or Polycarb or IR Pass material.
The illuminating unit 22 shines a beam of light onto a file d, the light is then refracted by the file d to scatter the light, the scattered light is then shone onto the linear optical sensor 21 to enhance effects.
Referring to
Referring to
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Because the linear optical sensor 21, the illuminating unit 22, the first protective body 24, the second protective body 23, the first light pipe 27 and the second light pipe 28 are combined integrally, the linear optical sensor 21, the illuminating unit 22, the first light pipe 27 and the second light pipe 28 can be fixed on accurate optical positions. As such, the complicated and precise optical adjustments necessary in the prior art can be omitted, and the complicated processes and errors that occurred during the prior art assembly process can be avoided.
Referring to
For the present invention, the imaging lens 25 is a spherical lens or a non-spherical lens which reduces lens aberrations. Also, the lens is lightened and thinned. Similarly, the lighting lens 26 has a spherical lens or a non-spherical lens to guide light. The illuminating unit 22 can be an incoherent illuminator or a coherent illuminator. The linear optical sensor 21 can offer good sensory effects due to the performance of factual intervention of the coherent illuminant. Alternatively, the illuminating unit 22 cooperates with the lighting lens 26 and uses the condensation and light guiding performance of the lighting lens 26 to enhance illumination. Thus, the linear optical sensor 21 has better sensory effects.
Referring to
For the improved packaging module of the optical sensor assembled in the mouse 4, it is the first embodiment which is assembled in the mouse 4. The linear optical sensor 21, the illuminating unit 22, the first protective body 24 and the second protective body 23 are combined integrally and correspond to the penetrating hole 43.
The illuminating unit 22 shines a beam of equal congregating light onto the file d by passing through the first protective body 24. Next, the light is scattered by the file d to form scattered light. The scattered light is shone onto the linear optical sensor 21 by the first aperture 231 of the first light pipe 27 to be sensed.
Also, other embodiments of the present invention can be applied in the mouse 4, and their efficacy is the same as that of the first embodiment.
In summary, the linear optical sensor, the illuminating unit, the first protective body and the second protective body of the present invention are combined integrally, which gives the present invention the following advantages:
1. The structure and process of the packaging module are all simple because the components of the module are combined integrally.
2. Adjustment is automatic during the assembly process because components of the module are combined integrally, and additional adjustment is unnecessary.
3. Cost of materials is low and the volume of the packaging module is reduced because the components of the module are combined integrally.
4. The first protective body is set upon the linear optical sensor and the illuminating unit, which ensures that the linear optical sensor and the illuminating unit avoid contact with impurities in the air that may shorten the life-span of the module.
5. Because the linear optical sensor, the illuminating unit, the imaging lens, the lighting lens, the first light pipe and the second light pipe are combined integrally, the components can be fixed on accurate optical positions, so unnecessary errors in the assembly process are avoided.
6. The imaging lens, the lighting lens, the first light pipe and the second light pipe can be assembled according to a user's requirements.
What is disclosed above are only the preferred embodiments of the present invention, and therefore it is intended that the present invention not be limited to the particular embodiment disclosed. It should be understood by those skilled in the art that various equivalent changes may be made depending on the specification and the drawings of present invention without departing from the scope of the present invention.
