CN2588449Y

CN2588449Y - Optical mouse structure

Info

Publication number: CN2588449Y
Application number: CN02287322U
Authority: CN
Inventors: 孙宗鼎; 庄瑞建; 蔡承宏; 黄轩凯
Original assignee: Edison Opto Corp
Current assignee: Edison Opto Corp
Priority date: 2002-11-22
Filing date: 2002-11-22
Publication date: 2003-11-26
Anticipated expiration: 2012-11-22

Abstract

The utility model discloses an optical mouse structure which is operated on a working plane. The utility model comprises a light emitter which can emit a light beam with preset wavelength, and an optical detector which is arranged in a casing, wherein, after primary reflection of the light beam with the preset wavelength on the working plane, the light beam is received by the optical detector, and is read by an internal circuit of the optical mouse. Because the structure removes a reflecting prism in the prior art, the light path loss is reduced, so the light transmission efficiency is high, and the manufacturing cost is saved simultaneously.

Description

The optical mouse structure

Technical field

The utility model relates to a kind of computer entry device, refers to a kind of optical mouse structure especially.

Background technology

Along with the progress of computer software and popularizing of graphic user interface, mouse has been widely used in the user interface of computing machine.Existing mouse is generally the mechanical type mouse, when rolling, drive X and Y direction grating wheel (encoder Wheel) by a spin, light signal by continuous blocking one optical transmitting set between this grating wheel, after photodetector receives, handle by suitable control circuit, get final product the interpretation mouse moving direction, the coupled computer driver can be controlled the direction that onscreen cursor moves again.Yet because the mechanical type mouse must be by spin (for example mouse pad) upward slip on a plane of heaviness, and spin must be exposed the mouse bottom surface by a circle hole, therefore after the long-time use of process, the dust slit between spin and circular hole easily enters mouse inside, influences mouse action.Simultaneously, Ben Chong spin also can increase user's burden.

Existing another kind of mouse is an optical mouse, be by an optical transmitting set (for example light emitting diode) emission light beam, light beam is after a special mouse pad with light and shade striped reflects, after promptly receiving by a photodetector (a for example inspection optical diode), in the time of can moving by mouse, have the light and shade striped mouse pad reflection variation and interpretation moving direction and corresponding cursor move.

Yet above-mentioned early stage optical mouse needs special mouse pad, can not use on general closed planar, causes greatly inconvenience of user.Progress along with photodetector, this light signal can be by the photodetector of an array formula, for example CMOS (Complementary Metal Oxide Semiconductor) image sensing component (CMOS IMAGE SENSOR) or Charged Coupled Device (CCD) detect, and the light signal change in pattern of interpretation different time can be learnt mouse moving direction.

As shown in Figure 1, be the sectional view of an existing optical mouse.This optical mouse has an optical transmitting set 10 (for example light emitting diode) emission one light beam, and this light beam has reflecting prism (light emitting prism) 12 leaded lights of special shape via one and incides on the working face 100 with low incident angle.Figure as can be seen thus, because light beam incides on the working face 100 with low incident angle, therefore also can be with less reflection angle reflection, or be not complete when smooth on the plane, also have big diffusion component and reflect toward a photodetector (a for example CMOS (Complementary Metal Oxide Semiconductor) image sensing component) 20.This optical mouse has a condenser lens 14 that is positioned on the reflection paths in addition, to adjust the image ratio of folded light beam, cooperate a digital signal processing unit (not icon) that is installed in the housing 30 again, can change by image and judge mouse moving direction and distance.

Yet, in this existing optical mouse, because needs one have the reflecting prism 12 of special shape, as shown in this figure, light must be through behind the secondary reflection, could be parallel to below the work 100 light beam with one and be directed to the light beam that and working face 100 have little incident angle, proceed to photodetector 20 again after primary event and via condenser lens 14.This reflecting prism 12 must carry out the processing in reflection horizon, makes to be difficult for, and owing to the cause that repeatedly reflects, also can cause the loss of light signal.

The utility model content

The purpose of this utility model is to provide a kind of optical mouse that has the high light transfer efficiency and reduce cost.

To achieve these goals, the utility model provides a kind of optical mouse structure, operates on the working face, has:

One optical transmitting set can be launched a predetermined wavelength light beam;

One photodetector places in the housing;

Wherein, this predetermined wavelength light beam is received by photodetector after this working face primary event, and by an internal circuit interpretation of optical mouse.

Aforesaid optical mouse structure wherein, also comprises lens and is placed on the housing, and between working face and photodetector; Wherein this predetermined wavelength light beam via this working face primary event after, after lens focus, receive the working face image, and by an internal circuit interpretation of optical mouse by photodetector.

Aforesaid optical mouse structure, wherein, described entirety of lens package is on this housing.

Aforesaid optical mouse structure, wherein, described lens are sphere lens, GRIN Lens, Fresnel lens, concave-convex lens or plano-convex lens.

Aforesaid optical mouse structure, wherein, described lens and this housing are one-body molded.

Aforesaid optical mouse structure, wherein, the non-lens surface of the part of described housing is the surface of handling through atomizing.

Aforesaid optical mouse structure, wherein, described lens have interference fringe.

Aforesaid optical mouse structure wherein, also comprises a hologram, is arranged in this beam path, and is shaped in this housing.

Aforesaid optical mouse structure, wherein, described optical transmitting set places in this housing.

Aforesaid optical mouse structure, wherein, the light beam of described optical transmitting set is derived outside the housing by a photoconductive tube.

Because structure of the present utility model has been removed the reflecting prism of prior art, thereby has reduced the light path loss, thereby has the high light transfer efficiency, simultaneously, has also saved manufacturing cost.

Description of drawings

Fig. 1 is the sectional view of an existing optical mouse;

Fig. 2 is the sectional view of the utility model first preferred embodiment optical mouse;

Fig. 3 is the sectional view of the utility model second preferred embodiment optical mouse;

Fig. 4 is the sectional view of the utility model the 3rd preferred embodiment optical mouse.

Embodiment

As shown in Figure 2, be the sectional view of the utility model first preferred embodiments optical mouse 1 because the part assembly of mouse such as button etc. be prior art, therefore no longer icon and explanation, and this sectional view to be the utility model mainly improve part.Mouse of the present utility model has an optical transmitting set 10 and a housing 30, and the pre-position of this housing 30 sets up a photodetector (for example a CMOS (Complementary Metal Oxide Semiconductor) image sensing or Charged Coupled Device (CCD) 20 and a condenser lens 14.Referring to this figure, 10 emitted light beams of optical transmitting set after the primary event via working face 100, directly receive the working face image via condenser lens 14 by photodetector 20 thus.Because only therefore once reflection can significantly reduce optical loss, can use the optical transmitting set 10 of lower-wattage, therefore can reduce cost.Moreover the utility model does not also need to have the reflecting prism of special shape, therefore can further reduce cost, and reduce assembling and maintenance difficult.

In this instantiation, this condenser lens 14 can be assembled on the housing 30 with the mode of assembling, and can be sphere lens (ball lens), GRIN Lens (GRIN lens), Fresnel lens (Fresnellens), concave-convex lens or plano-convex lens (planoconvex lens).Simultaneously, this condenser lens 14 can be integrally formed with housing 30, and as shown in Figure 2, the non-lens basal surface partly of this housing 30 can be handled (matted treatment) and form a cloudy surface 32 through atomizing, to avoid interference.Moreover it is 1: 1 that the installation position of this condenser lens 14 can make the image ratio, and 1: N, or N: 1 (wherein N is a natural number) is to simplify follow-up digital signal processing.

In the utility model, also can further be improved for lens 14, for example can on lens 14, set up interference fringe, so that reflected image is done modulation, the signal that is read is through the signal of interfering, as moire pattern (shadow Moire).Light signal of the present utility model in addition can also be realized with the mode of holography (hologram), as shown in Figure 2, can add a hologram 33 in light path, and this hologram is positioned within the integrated cap 30, handles to be received by photodetector 20.Experiment showed, if condenser lens is not set on optical mouse that through this case inventor then the light signal that is received also is enough to interpretation and goes out position information, also can set up transparent dust cap (not icon) this moment on housing 30, enter housing 30 to avoid dust.

Figure 3 shows that the sectional view of the utility model second preferred embodiments optical mouse, in the mouse of this preferred embodiments, optical transmitting set 10 places within the housing 30, therefore can obtain the more assembling of small size, and reduce cost.In addition, can on the housing 30 relative, set up leaded light partly (not label, the overhang on cloudy surface 32 right sides), light beam is directed to working face 100 with optical transmitting set 10.

Figure 4 shows that the sectional view of the utility model the 3rd preferred embodiments optical mouse, similar second preferred embodiments of this preferred embodiments, but be its further improvement.In this instantiation, optical transmitting set 10 also can place within housing 30 housings, and directive working face 100 after primary event, is directly received by photodetector 20 via condenser lens 14 by at least one photoconductive tube 16 guidings.Moreover optical transmitting set 10 also can place outside housing 30 housings, and directive working face 100 after primary event, is directly received by photodetector 20 via condenser lens 14 by a photoconductive tube 16 guidings.

The above only is a specific embodiment of the utility model, and scope of the present utility model is not limited thereto, and is light emitting diode and can be bulb type, surface mount component (SMD) type, Quartering shot type or deviation type as this optical transmitting set.The wavelength that this light emitting diode is sent out is corresponding to monochromatic light, bi-coloured light or polychromatic light.The packaged type of this optical transmitting set can be plastics crystal grain carrying encapsulation (PLCC, plastic leadlesschip carrier), the bare chip that the aqueous encapsulation of top formula is covered in use encapsulates (Glob-top COB) or uses the bare chip of metaideophone moulding to encapsulate (Transfer molding COB) at plate at plate, this working face also can be fingerprint (finger print), and variation of being implemented or modification all covered in the claim of this case.

Claims

1. an optical mouse structure operates on the working face, it is characterized in that, comprising:

One photodetector places in the housing;

This predetermined wavelength light beam is received by photodetector after this working face primary event.

2. optical mouse structure as claimed in claim 1 is characterized in that, also comprises lens, is placed on the housing, between working face and photodetector; By this predetermined wavelength light beam after this working face primary event, after lens focus, receive by this photodetector.

3. optical mouse structure as claimed in claim 2 is characterized in that described entirety of lens package is on this housing.

4. optical mouse structure as claimed in claim 2 is characterized in that, described lens are sphere lens, GRIN Lens, Fresnel lens, concave-convex lens or plano-convex lens.

5. optical mouse structure as claimed in claim 2 is characterized in that, described lens and this housing are one-body molded.

6. optical mouse structure as claimed in claim 5 is characterized in that, the non-lens surface of the part of described housing has the superficial layer of handling once atomizing.

7. optical mouse structure as claimed in claim 1 is characterized in that described lens have interference fringe.

8. optical mouse structure as claimed in claim 1 is characterized in that, also comprises a hologram, is arranged in this beam path, and is shaped in this housing.

9. optical mouse structure as claimed in claim 1 is characterized in that described optical transmitting set places in this housing.

10. optical mouse structure as claimed in claim 9 is characterized in that the light beam of described optical transmitting set is derived outside the housing by a photoconductive tube.