CN201007821Y - Optical structure of optical mouse - Google Patents

Abstract

The utility model relates to an optical structure of an optical mouse, comprising a luminary, a lens unit and a light sensing unit, wherein the luminary is employed to provide projected beam, a bottom surface of the lens unit forms a condensing surface which is just located on a projection path of the beam, the lens unit is used to adjust the slope of the beam, and a normal of the condensing surface of the lens unit is vertical to a target surface, thereby the beam is focused on the bottom of the lens unit and is transmitted to the target surface, and an image capture path is just through the lens unit from the target surface and enters into the top end of the lens unit, the light sensing unit is relatively located at the upper end of the lens unit and is employed to capture images of the target surface. The above structure leads the beam to focus on the target surface through the lens unit, enabling the light sensing unit to clearly read images of the target surface, and correspondingly judging a displacement direction of an input device body on the target surface and the displacement distance data according to the changing of the image of the target surface when moving.

Description

The optical texture of optical mouse

Technical field

The utility model relates to a kind of optical texture of optical mouse, be particularly related to a kind of by being provided with lens between luminophor and target surface, when just making light beam pass through these lens, produce refraction effect, and then adjustment projected path, the light beam of luminophor is concentrated on the target surface downwards, thereby make light sensing unit clearly detect image on the target surface.

Background technology

Progress and development along with science and technology, computing machine become among the human lives indispensable some, and input media is the interfacing equipment of computing machine indispensability, be coupled computer function with rapid changepl. never-ending changes and improvements, input media (such as: mouse, keyboard or the like) also bringing in constant renewal in research and development in the hope of more closing in practicality, with mouse, keyboard is an example, except a large amount of literal inputs, the frequency of utilization of mouse more is better than keyboard, because mouse has excellent degree of freedom and handling, can assist and the huge keyboard of substituted volume, particularly to the controlling of multimedia and internet, mouse has more the status that can not be substituted.

The kind of the mouse that is sold on the market at present, can be divided into mechanical mouse and optical mouse haply, though low, the low price of mechanical mouse technical threshold precisely because that shortcoming then is a trace ball is easy to wear in the process of rolling, suck dust, causes the mechanical mouse degree of accuracy to reduce.

The know-why of optical mouse is to utilize luminophor (being generally the emitting red light body) to light shine on the target surface, capture the folded light beam of passing back within a certain period of time, against per second scanning acquisition repeatedly, via comparison, can calculate the direction that mouse moves, and how many distances the decision mouse has moved.

Existing in the market optical mouse, see also Fig. 1, the cut-open view of existing a kind of optical mouse, its mouse moves on a plane, when startup light-emitting component a is projected to the first reflecting surface b1 of light guide plate b with luminophor, promptly this luminophor can be reflexed on the second reflecting surface b2, reflection via this second reflecting surface b2, luminophor can pass the opening of base c, be incident upon the target surface d that a nontransparent interface forms, when target surface d is non-transparent interface, the target surface d and the first image axle I are overlapping, make the image on the last projective object first image axle I of luminophor institute of the proper fechtable target surface of image capture element e d, make the correct image of the sustainable acquisition of this image capture element e, and then calculate this mouse moving distance and direction exactly by circuit control unit (figure does not show).

According to above-mentioned, the pick-up image structure of this optical mouse need make the light beam D of projection and the light beam R of pick-up image intersect at a point on the first image axle I of target surface d, can make image capture element e correctly capture the image signal of the first image axle I.

But, as Fig. 2, if this target surface d is that a transparent dielectric material (as: glass) is made, because the target surface d and the first image axle I are not overlapping, when projection light is incident to target surface d, if when being not counted in refractive index, the light beam D meeting transmission target surface d of projection and the second image axle I1 joining of its below, meaning promptly, the light beam D of this projection and the light beam R of pick-up image can't intersect at the first image axle I, so cause this optical mouse on target surface d, not act on, in other words, this optical mouse on transparent dielectric layer with ineffective.

For improving the problems referred to above, industry production at present has another existing optical mouse, see also shown in Figure 3, by among the figure as can be known, when mouse is mobile on a plane, when seeing through light beam D that light-emitting component a throwed and being passed to the first reflecting surface b1 of light guide plate b, just the light beam D of this projection vertically can be reflexed to the surface of a spectroscope f (beam splitter), this spectroscope f is one can be with the part reflection of the light beam D of this projection, and the optical object of another part transmission.Reflect through this spectroscope f, make the light beam D of this projection be transmitted through the target surface d of a transparent dielectric layer (glass) below downward vertically, make this target surface d reflect the inner face of the light beam R of a pick-up image to spectroscope f, make that the light beam R of pick-up image is overlapping with the light beam D through this projection of this spectroscope f reflection, and intersect with the second image axle I1 of the target surface d of transparent dielectric layer below.Reflect light beam R to lens of this pick-up image through this spectroscope f, for the image of image capture element e acquisition through this lensing.

Right as above-mentioned when being configured in actual use, because the luminophor signal that this light-emitting component a projects will reflect through light guide plate b, reflect via spectroscope f beam split again, can pass to target surface d, especially in the spectroscopic processes, there is most of luminous energy to scatter and disappear from spectroscope f transmission, makes that relatively the luminous energy availability is on the low side.Especially, in order to make, reach the image that is enough to target surface d and pass the light beam that supports to target surface d through transparent dielectric layer, must strengthen the luminous power of this light-emitting component a, to expend light energy source relatively, in energy starved today, be a not environmental protection of the utmost point, uneconomic design in fact.

Summary of the invention

Fundamental purpose of the present utility model is to overcome the deficiencies in the prior art and defective, a kind of optical texture of optical mouse is proposed, by being provided with a lens unit between luminophor and target surface, when just making light beam scioptics unit, produce refraction effect, and then the adjustment projected path, the light beam of luminophor is concentrated on the target surface, thereby make light sensing unit clearly detect image on the target surface.

In order to achieve the above object, the utility model provides a kind of optical texture of optical mouse, and it comprises: a luminophor provides the light beam of projection; One lens unit, its bottom surface is formed with the caustic surface of an adjustment light beam slope, just be positioned on the projected path of light beam, and the vertical target surface of caustic surface normal of this lens unit, make light beam focus on this lens unit bottom, and then be transmitted through target surface, and the image capture path just from target surface by this lens unit, constriction is in this lens unit upper end; And a light sensing unit, be positioned at this lens unit upper end relatively, in order to the image of acquisition target surface.

As above-mentioned structure, the beneficial effects of the utility model are, caustic surface by this lens unit makes light beam focus on target surface, make the clear image that reads target surface of light sensing unit, and the image of target surface changes and correspondingly judges that the input media body is in the sense of displacement and the shift length data of target surface when mobile.

For enabling further to understand feature of the present utility model and technology contents, see also following about detailed description of the present utility model and accompanying drawing, yet appended graphic only provide with reference to and the explanation usefulness, be not to be used for the utility model is limited.

Description of drawings

Fig. 1 is the cross-sectional schematic of existing optical texture;

Fig. 2 is the embodiment synoptic diagram of existing optical texture;

Fig. 3 is the cross-sectional schematic of another existing optical texture;

Fig. 4 is the beam path synoptic diagram of the utility model light beam scioptics unit;

Fig. 4 A is the beam path synoptic diagram that the utility model light beam scioptics unit enters transparent dielectric layer;

Fig. 5 is the cross-sectional schematic of the utility model second embodiment;

Fig. 6 is the cross-sectional schematic of the utility model the 3rd embodiment;

Fig. 7 is the cross-sectional schematic of the utility model the 4th embodiment;

Fig. 8 is the cross-sectional schematic of the utility model the 5th embodiment.

Symbol description among the figure

Prior art

The a light-emitting component

The b light guide plate

B1 first reflecting surface

B2 second reflecting surface

The c base

The d target surface

E image capture element

The f spectroscope

The light beam of R pick-up image

The light beam of D projection

The I first image axle

The I1 second image axle

The utility model

1 luminophor

2 base bodies

21 spaces

22 lens units

221 caustic surfaces

222 leaded light prisms

24 collector lenses

25 leaded light mirrors

3 light sensing units

4 target surfaces

5 transparent dielectric layers

L1 light beam incident path

L2 image capture path

The A first image axle

The B second image axle

Embodiment

At first, see also shown in Figure 4ly, the utility model is located in the input media body, and it comprises: a luminophor 1, a lens unit 22 and a light sensing unit 3; Wherein,

This luminophor 1 can be visible luminophor 1 or invisible luminophor 1, and the concrete structure of this luminophor 1 adopts laser or light emitting diode, and it is mainly in order to providing the light beam of a projection, and the projecting direction of this luminophor is the horizontal direction projection.

22 pairs of this lens units should luminophor 1 light beam incident path L1 and image capture path L2, and this lens unit 22 is convex lens, being formed with a caustic surface 221 in these lens unit 22 its bottom surfaces just is positioned on the light beam incident path L1, in order to adjust the slope of light beam, relatively these both sides, caustic surface 221 top are formed with respectively on the light beam incident path L1 that a leaded light prism 222 just is positioned at the light emitted bundle of this luminophor in these lens unit 22 tops, be reflected into the caustic surface 221 of this lens unit 22 in order to the guiding light beam, make light beam focus on this lens unit 22 bottoms, it is target surface 4, and the vertical target surface 4 of the normal of this lens unit 22, make the image of target surface 4 pass through this lens unit 22 along image capture path L2, constriction is in these lens unit 22 upper ends.

This light sensing unit 3 is set up in 22 upper ends, said lens unit, in order to the image of acquisition from target surface 4 image capture path L2.

When implementing as above-mentioned structure, shown in Fig. 4 A, be positioned on the light beam incident path L1 by set this leaded light prism 222 around this lens unit 22, make the light beam incident path L1 of this luminophor 1 can see through these leaded light prism 222 guidings through once or reflect the caustic surface 221 that enters this lens unit 22 once more than, thereby reach light beam is guided on function on this caustic surface 221, caustic surface 221 by this lens unit 22 makes light beam on the light beam incident path L1 produce refraction effect to centre focus again, and concentrate at the target surface 4 of distance in a transparent dielectric layer 5 (glass) below, make light beam penetrate the first surperficial image axle A of a transparent dielectric layer 5 (glass) by constriction, the second image axle B of the target surface 4 of below is gone in projection, make the image of target surface 4 penetrate this transparent dielectric layer 5 along image capture path L2, by this lens unit 22, and then inject this light sensing unit 3, make this light sensing unit 3 clear target surface 4 images that read, and then change by circuit control unit image of target surface 4 when mobile and correspondingly judge that the input media body is in the sense of displacement and the shift length data of target surface 4.

Second embodiment of the present utility model, as shown in Figure 5, this luminophor 1 can be the vertical direction setting in the above-mentioned structure, cause the light beam incident path L1 of 1 projecting beam of this luminophor can't directly inject the caustic surface 221 of this lens unit 22, this moment is still by being provided with a plurality of these leaded light prisms 222 around this lens unit 22, wherein have at least this leaded light prism 222 just to be positioned at light beam incident path L1, at least two these leaded light prisms reflect mutually.Make light beam change biography, and inject the caustic surface 221 of this lens unit 22 via the reflection of a plurality of these leaded light prisms 222.

As above-mentioned structure, the light beam of this luminophor 1 is injected this leaded light prism 222 that is positioned at this luminophor 1 below earlier, make the light beam incident path L1 of this luminophor 1 can see through this leaded light prism 222 guidings, and this another leaded light prism 222 is gone in horizontal reflection, make this light beam incident path L1 can see through this another leaded light prism 222 guidings, vertically inject the caustic surface 221 of this lens unit 22, light beam is guided on function on this caustic surface 221 thereby reach.

The 3rd embodiment of the present utility model, as shown in Figure 6, in the above-mentioned structure, this luminophor 1 and this lens unit 22 are located in the base body 2.This base body 2 constitutes by transparency material is one-body molded, and is provided with a space 21 in the light beam incident path L1 and the beam reflection path L2 of this luminophor 1, and this lens unit 22 is set in this space 21.

The 4th embodiment of the present utility model, as shown in Figure 7, in the above-mentioned structure, in this base body 2, be provided with the collector lens 24 that at least one tool is adjusted image effect in the image capture path L2 of 22 of this light sensing unit 3 and this lens units, in order to adjust the sharpness of image, make this light sensing unit 3 obtain better image capture.

As above-mentioned structure, see through this collector lens 24 of being located on the L2 of image capture path target surface 4 images are done further adjustment, inject this light sensing unit 3 again, can make 3 picked image of this light sensing unit more limpid in sight.

The 5th embodiment of the present utility model, as shown in Figure 8, in the above-mentioned structure, 21 tops, space of this base body 2, be provided with at least one leaded light mirror 25 in this light sensing unit 3 and 22 of this lens units and just be positioned on the L2 of image capture path, in order to image-guided to this light sensing unit 3.

As above-mentioned structure, this light sensing unit 3 can be positioned at the caustic surface 221 of this lens unit 22 and be positioned on the identical normal, changes image capture path L2 and can see through this leaded light mirror 25, makes image capture path L2 correspondence inject this light sensing unit 3.

In sum, the utlity model has following advantage:

1, the light beam that enters of the caustic surface 221 pair of the utility model by this lens unit 22 produces the effect that constriction focuses on, make light beam incident path L1 adjust constriction, and transparent dielectric layer 5 (glass) surface under penetrating, projection goes into to be positioned on the target surface 4 of transparent dielectric layer 5 belows, and the image energy of target surface 4 is clearly captured.

2, the utility model is done constriction focusing owing to see through this caustic surface 221 with light beam, thereby reduce the consume of beam energy, make the luminophor 1 that equates luminous power on this structure, can perform to maximum beam intensity, the image energy of target surface 4 is clearly captured, thereby save luminous power output relatively, make full use of light energy source, in energy starved today, real be the design of both environmental protection and economy.

3, light beam of the present utility model is injected target surface 4 and is and concentrate surrounds, and the vertical target surface 4 of the normal of this lens unit 22, so it is overlapping that light beam incident path L1 and image capture path L2 are close to, thereby avoid the light beam contact physical influence by transparent dielectric layer 5 refraction that causes, the image energy that makes target surface 4 smoothly, clearly captured.

The above only is a preferable possible embodiments of the present utility model, and is non-so limit to claim of the present utility model, thus use such as the utility model instructions and accompanying drawing content institute for it equivalence techniques change, all be contained in the scope of the present utility model.

Claims (15)

1. the optical texture of an optical mouse is located in the input media body, it is characterized in that it comprises:

One luminophor provides the light beam of projection;

One lens unit, its bottom surface are formed with the caustic surface of an adjustment light beam slope, just are positioned on the projected path of light beam, make light beam focus on this lens unit bottom, and then be transmitted through target surface, and the image capture path just from target surface by this lens unit, constriction is in this lens unit upper end;

One light sensing unit is positioned at this lens unit upper end, relatively in order to the image of acquisition from target surface.

2. the optical texture of optical mouse as claimed in claim 1 is characterized in that, this luminophor is invisible luminophor.

3. the optical texture of optical mouse as claimed in claim 1 is characterized in that, this luminophor is visible luminophor.

4. the optical texture of optical mouse as claimed in claim 1 is characterized in that, this luminophor is a laser.

5. the optical texture of optical mouse as claimed in claim 1 is characterized in that, this luminophor is a light emitting diode.

6. the optical texture of optical mouse as claimed in claim 1, it is characterized in that, around this lens unit, in the projected path of this luminophor be provided with at least one leaded light prism in order to the guiding light beam through once or the caustic surface that is reflected into this lens unit once.

7. the optical texture of optical mouse as claimed in claim 6 is characterized in that, this lens unit this at least one side in caustic surface top relatively is provided with at least one this leaded light prism.

8. the optical texture of optical mouse as claimed in claim 6 is characterized in that, this lens unit these both sides, caustic surface top relatively is respectively equipped with at least one this leaded light prism.

9. as the optical texture of claim 6,7 or 8 described optical mouse, it is characterized in that having at least two these leaded light prisms to reflect mutually around this lens unit, make light beam through once or once more than reflecting, and inject this caustic surface.

10. the optical texture of optical mouse as claimed in claim 1 is characterized in that, this lens unit is convex lens, and is formed with this caustic surface in this lens unit bottom surface.

11. the optical texture of optical mouse as claimed in claim 1 is characterized in that, this light sensing unit is positioned on the identical normal with this lens unit.

12. the optical texture of optical mouse as claimed in claim 11 is characterized in that, the image capture path between this light sensing unit and this lens unit is provided with at least one collector lens in order to the sharpness of adjusting image.

13. the optical texture of optical mouse as claimed in claim 1 is characterized in that, is provided with at least onely in order to image is reflexed to the leaded light mirror of this light sensing unit between this light sensing unit and this lens unit, just is positioned on the image capture path.

14. the optical texture of optical mouse as claimed in claim 1, it is characterized in that, be provided with a base body in the input media body, have in this base body on the projected path and image capture path that a space just is positioned at light beam, be provided with this lens unit in this space.

15. the optical texture of optical mouse as claimed in claim 14 is characterized in that, relative this lens unit top is provided with this collector lens in this space.

Images