CN2789830Y - Light ray projecting device for optical mouse - Google Patents
Light ray projecting device for optical mouse Download PDFInfo
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- CN2789830Y CN2789830Y CNU2005200027674U CN200520002767U CN2789830Y CN 2789830 Y CN2789830 Y CN 2789830Y CN U2005200027674 U CNU2005200027674 U CN U2005200027674U CN 200520002767 U CN200520002767 U CN 200520002767U CN 2789830 Y CN2789830 Y CN 2789830Y
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- light
- plane
- image detecting
- optical mouse
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Abstract
The utility model relates to a light ray projecting device for an optical mouse, which comprises a light guiding main body which is provided with a first inclined plane, a second inclined plane and a light splitting plane, wherein light rays enter the light guiding main body, and part of the light rays are reflected by the first inclined plane to the light splitting plane and reflected by the light splitting plane so as to form a first beam which projects vertically to a detecting area of a detecting plane of an image; another part of the light rays are reflected by the first inclined plane to the second inclined plane and refracted by the second inclined plane so as to form a second beam which projects to the detecting area; the first beam enables an image sensing element of the optical mouse to accurately fetch the image on the detecting area; the second beam enables the brightness contrast of the concave sections and the convex sections of the detecting area to be more obvious so as to effectively improve the identification capability of the image sensing element of the optical mouse to the detecting area.
Description
Technical field
The utility model relates to a kind of light projection device, relates in particular to a kind of light projection device of optical mouse.
Background technology
When optical mouse is displaced on the image detecting face, this optical mouse is detected the recess on this image detecting face and the image at protruding place by its image detecting element, and further by its circuit unit do can rank conversion, with sense of displacement and the displacement that calculates this optical mouse, make it can move a cursor on a display screen.
See also shown in Figure 1, for known optical mouse comprises a light projection device 8, a light source 2, an imaging len 3 and an image detecting element 4 etc.This light projection device 8 comprises a light guide body, and it has a convex lens 80, one first inclined-plane 81, one second inclined-plane 82 and an exiting surface 83.This first inclined-plane 81 is corresponding to this convex lens 80, and this second inclined-plane 82 is corresponding to this first inclined-plane 81, and this exiting surface 83 is corresponding to this second inclined-plane 82 and towards an image detecting face 5.This image detecting face 5 is provided with a transparent medium 6 (as a glass).The light of this light source 2 enters this light guide body via this convex lens 80, and this light is reflexed to this second inclined-plane 82 by this first inclined-plane 81, and is reflected to form a light beam L by this second inclined-plane 82 and be passed to this transparent medium 6 obliquely.This light beam L passes this transparent medium 6 and is projected to this image detecting face 5 obliquely.
Because the position that this light beam L intersects at this image detecting face 5 is not the detection region 50 that is positioned on this imaging len 3 and this image detecting element 4 formed image capture optical axis X, cause this image detecting element 4 can't capture image on the detection region 50 of this image detecting face 5 exactly.As a result, when this optical mouse was displaced on this image detecting face 5, moving of the cursor on the display screen was sensitive inadequately, even the cursor on can't moving display screen.
See also shown in Figure 2, for another known optical mouse comprises a light projection device 9, a light source 2, an imaging len 3 and an image detecting element 4 etc.This light projection device 9 comprises a light guide body, and it has a convex lens 90, one first inclined-plane 91, an exiting surface 93 and a light splitting surface 94.This first inclined-plane 91 is corresponding to this convex lens 90, this exiting surface 93 is corresponding to this first inclined-plane 91, this light splitting surface 94 is corresponding to this exiting surface 93 and this first inclined-plane 91, form an opening 95 between this light splitting surface 94 and this exiting surface 93 towards an image detecting face 5, and this light splitting surface 94 is towards this image detecting face 5.This image detecting face 5 is provided with a transparent medium 6 (as a glass).The light of this light source 2 enters this light guide body via this convex lens 90, and this light is reflexed to this light splitting surface 94 and reflected to form a light beam L by this light splitting surface 94 by this first inclined-plane 91 and vertically is passed to this transparent medium 6.This light beam L passes this transparent medium 6 and vertically is projected to the detection region 50 of this image detecting face 5.
Because the position that this light beam L intersects at this image detecting face 5 is positioned at the detection region 50 on this imaging len 3 and this image detecting element 4 formed image capture optical axis X, make this image detecting element 4 can capture image on the detection region 50 of this image detecting face 5 exactly.So, this image detecting face 5 is a ups and downs surface, and when this light beam L vertically was projected to this image detecting face 5, the recess of this image detecting face 5 and the contrast of the light and shade at protruding place were obvious inadequately, cause the detecting degree of difficulty of this image detecting element 4 to increase.As a result, when this optical mouse was displaced on this image detecting face 5, moving of the cursor on the display screen was sensitive inadequately, especially when this optical mouse during by high-speed mobile, more was difficult to control the mobile of cursor.
As from the foregoing, the light projection device of above-mentioned known optical mouse on reality is used, obviously has inconvenience and exists with defective, and remain to be improved.
Thus, the improving of the above-mentioned defective of the utility model thoughts is that the spy concentrates on studies and cooperates the utilization of scientific principle, proposes a kind of reasonable in design and effectively improve the device of above-mentioned defective finally.
Summary of the invention
Fundamental purpose of the present utility model, be to provide a kind of light projection device of optical mouse, when making this optical mouse be displaced on the image detecting face, the image detecting element of this optical mouse can be promoted effectively to the identification capability of the detection region of this image detecting face.
In order to reach above-mentioned purpose, the utility model is mainly providing a kind of light projection device of optical mouse, comprise a light guide body, it has one first inclined-plane, one second inclined-plane and a light splitting surface, this second inclined-plane and this light splitting surface be corresponding to this first inclined-plane, and this second inclined-plane and this light splitting surface are towards an image detecting face; Wherein light enters this light guide body, this local light is reflexed to this light splitting surface by this first inclined-plane and is reflected to form the detection region that one first light beam vertically is projected to this image detecting face by this light splitting surface, and this light of another part is reflexed to this second inclined-plane and is projected to this detection region by this second inclined-plane refraction obliquely to form one second light beam by this first inclined-plane.
In order to reach above-mentioned purpose, the utility model is mainly providing a kind of light projection device of optical mouse, comprises a light guide body, and it has one first inclined-plane, one second inclined-plane and a light splitting surface, this light splitting surface is corresponding to this first inclined-plane, and this light splitting surface is towards an image detecting face; Wherein light enters this light guide body, this local light is reflexed to this light splitting surface by this first inclined-plane and is reflected to form the detection region that one first light beam vertically is projected to this image detecting face by this light splitting surface, and this light of another part is projected to this detection region by this second inclined-plane reflection obliquely to form one second light beam.
Vertically be projected to the detection region of this image detecting face by this first light beam, make the image detecting element of this optical mouse can capture image on this detection region exactly; Be projected to the detection region of this image detecting face obliquely by this second light beam, make the light and shade contrast at the recess of this detection region and protruding place more obvious, thereby can promote the identification capability of the image detecting element of this optical mouse effectively this detection region.
Description of drawings
Fig. 1 is the diagrammatic cross-section of application of the light projection device of known optical mouse.
Fig. 2 is the diagrammatic cross-section of application of the light projection device of known another optical mouse.
Fig. 3 is the diagrammatic cross-section of application of light projection device first embodiment of the utility model optical mouse.
Fig. 3 A is the A part enlarged drawing of Fig. 3.
Fig. 3 B is the B part enlarged drawing of Fig. 3.
Fig. 3 C is the diagrammatic cross-section of Another Application of light projection device first embodiment of the utility model optical mouse.
Fig. 4 is the diagrammatic cross-section of application of light projection device second embodiment of the utility model optical mouse.
Fig. 4 A is the diagrammatic cross-section of Another Application of light projection device second embodiment of the utility model optical mouse.
Fig. 5 is the diagrammatic cross-section of application of light projection device the 3rd embodiment of the utility model optical mouse.
Fig. 5 A is the diagrammatic cross-section of Another Application of light projection device the 3rd embodiment of the utility model optical mouse.
Symbol is said among the figure:
(known technology label)
8 light projection devices
80 convex lens, 81 first inclined-planes
82 second inclined-planes, 83 exiting surfaces
9 light projection devices
90 convex lens, 91 first inclined-planes
93 exiting surfaces, 94 light splitting surfaces
95 openings
2 light sources
The L light beam
3 imaging lens
4 image detecting elements
5 image detecting faces
50 detection region
6 transparent mediums
X image capture optical axis
(the utility model label)
1 light projection device
10 convex lens, 11 first inclined-planes
12 second inclined-planes, 13 exiting surfaces
14 light splitting surfaces, 15 openings
16 cambered surface α angles
The β angle
2 light sources
The L1 first light beam L2 second light beam
L3 the 3rd light beam
3 imaging lens
4 image detecting elements
5 image detecting faces
50 detection region, 501 recesses
502 protruding places
6 transparent mediums
X image capture optical axis
Embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined purpose is taked, see also following about detailed description of the present utility model and accompanying drawing, believe the purpose of this utility model, feature and characteristics, go deep into and concrete understanding when getting one thus, yet shown in accompanying drawing only provide with reference to and the explanation usefulness, be not to be used for the utility model is limited.
See also shown in Figure 3ly, be the utility model first embodiment.The light projection device of a kind of optical mouse of the utility model.This optical mouse comprises a light projection device 1, a light source 2, an imaging len 3 and an image detecting element 4 etc.
The step of the light projection method of optical mouse of the present utility model comprises:
(1) provides a light projection device 1.
The light projection device 1 of optical mouse of the present utility model comprises a light guide body, but these imaging len 3 one are connected in this light guide body.This light guide body has a convex lens 10, one first inclined-plane 11, one second inclined-plane 12, an exiting surface 13 and a light splitting surface 14.The light that is projected to this light splitting surface 14 can be gone out this light splitting surface 14 by these light splitting surface 14 reflections or transmissive.
This first inclined-plane 11 is corresponding to this convex lens 10, and this second inclined-plane 12, this exiting surface 13 and this light splitting surface 14 be corresponding to this first inclined-plane 11, this light splitting surface 14 and corresponding to this exiting surface 13.Form an opening 15 between this second inclined-plane 12 and this light splitting surface 14 with towards an image detecting face 5, and this second inclined-plane 12 and this light splitting surface 14 are towards this image detecting face 5.Can be provided with a transparent medium 6 (as a glass) on this image detecting face 5.This image detecting face 5 to the angle α between this first inclined-plane 11 less than this image detecting face 5 to the angle β between this second inclined-plane 12.
(2) throw light enters this light projection device 1 to form one first light beam L1 and one second light beam L2, and this first light beam L1 vertically is projected to the detection region 50 of this image detecting face 5, and this second light beam L2 is projected to this detection region 50 obliquely.
As shown in Figure 3, the light of this light source 2 enters this light guide body via this convex lens 10, and the light of this local light source 2 vertically is passed to this transparent medium 6 to this light splitting surface 14 and by these light splitting surface 14 reflections to form one first light beam L1 through this exiting surface 13 by these first inclined-plane, 11 reflections.This first light beam L1 passes this transparent medium 6 and vertically is projected to the detection region 50 of this image detecting face 5.The light of this light source 2 of another part is reflexed to this second inclined-plane 12 and is passed to this transparent medium 6 by these second inclined-plane, 12 refractions obliquely to form one second light beam L2 by this first inclined-plane 11.This second light beam L2 passes this transparent medium 6 and is projected to this detection region 50 obliquely.
See also shown in Fig. 3 and Fig. 3 A, the light guide body of the light projection device 1 of optical mouse of the present utility model further has a cambered surface 16, and this cambered surface 16 is connected between this second inclined-plane 12 and this exiting surface 13.The light of this light source 2 of another part is reflexed to this cambered surface 16 and is projected to detection region 50, the three light beam L3 of this image detecting face 5 obliquely by 16 refractions of this cambered surface between this first light beam L1 and this second light beam L2 with the 3rd light beam L3 that forms a fan-shaped progressive angle by this first inclined-plane 11.
(3) this first light beam L1, this second light beam L2 and the 3rd light beam L3 by the reflection of the detection region 50 of this image detecting face 5 through these light splitting surfaces 14 and this imaging len 3 to this image detecting element 4, and further calculate the sense of displacement and the displacement of this optical mouse by the circuit unit (sign) of this optical mouse.
See also shown in Fig. 3 and Fig. 3 B, this first light beam L1 vertically is projected to the detection region 50 of this image detecting face 5, this detection region 50 is positioned on this imaging len 3 and this image detecting element 4 formed image capture optical axis X, therefore, make the image detecting element 4 of this optical mouse can capture image on the detection region 50 of this image detecting face 5 exactly.This second light beam L2 is projected to the detection region 50 of this image detecting face 5 obliquely, the recess 501 and the protruding place 502 of the detection region 50 of this image detecting face 5 produce shadow effects and reflection action respectively, therefore, make the light and shade contrast at the recess 501 of detection region 50 of this image detecting face 5 and protruding place 502 more obvious, thereby can promote the identification capability of 4 pairs of these detection region 50 of image detecting element of this optical mouse effectively.When this optical mouse was displaced on this image detecting face 5, this image detecting element 4 can capture image more clearly, thereby made moving of cursor on the display screen more sensitive.The 3rd light beam L3 to form the light beam of a full angle, makes this image detecting element 4 can capture image more clearly between this first light beam L1 and this second light beam L2.
See also shown in Fig. 3 C, this image detecting face 5 is not provided with the transparent medium 6 as Fig. 3, and the scope that this first light beam L1, this second light beam L2 and the 3rd light beam L3 are projected to this detection region 50 is big, therefore, can guarantee the detecting effect of this image detecting element 4.
See also shown in Figure 4ly, be the utility model second embodiment.The step of the light projection method of optical mouse of the present utility model comprises:
(1) provides a light projection device 1.
The light projection device 1 of optical mouse of the present utility model comprises a light guide body, but these imaging len 3 one are connected in this light guide body.This light guide body has a convex lens 10, one first inclined-plane 11, one second inclined-plane 12, an exiting surface 13 and a light splitting surface 14.The light that is projected to this light splitting surface 14 can be gone out this light splitting surface 14 by these light splitting surface 14 reflections or transmissive.
This first inclined-plane 11 and this second inclined-plane 12 are corresponding to this convex lens 10, this exiting surface 13 is corresponding to this first inclined-plane 11 and this second inclined-plane 12, this light splitting surface 14 is corresponding to this first inclined-plane 11 and this exiting surface 13, form an opening 15 between this light splitting surface 14 and this exiting surface 13 towards an image detecting face 5, and this light splitting surface 14 is towards this image detecting face 5.Can be provided with a transparent medium 6 (as a glass) on this image detecting face 5.This image detecting face 5 to the angle α between this first inclined-plane 11 less than this image detecting face 5 to the angle β between this second inclined-plane 12.This first inclined-plane 11 is near this convex lens 10, and this second inclined-plane 12 is near this image detecting face 5.
(2) throw light enters this light projection device 1 to form one first light beam L1 and one second light beam L2, and this first light beam L1 vertically is projected to the detection region 50 of this image detecting face 5, and this second light beam L2 is projected to this detection region 50 obliquely.
As shown in Figure 4, the light of this light source 2 enters this light guide body via this convex lens 10, and the light of this local light source 2 vertically is passed to this transparent medium 6 to this light splitting surface 14 and by these light splitting surface 14 reflections to form one first light beam L1 through this exiting surface 13 by these first inclined-plane, 11 reflections.This first light beam L1 passes this transparent medium 6 and vertically is projected to the detection region 50 of this image detecting face 5.The light of this light source 2 of another part is passed to this transparent medium 6 by these second inclined-plane, 12 reflections obliquely to form one second light beam L2.This second light beam L2 passes this transparent medium 6 and is projected to this detection region 50 obliquely.
As shown in Figure 4, the light guide body of the light projection device 1 of optical mouse of the present utility model further has a cambered surface 16, and this cambered surface 16 is connected between this first inclined-plane 11 and this second inclined-plane 12.The light of this light source 2 of another part is projected to detection region 50, the three light beam L3 of this image detecting face 5 by 16 reflections of this cambered surface between this first light beam L1 and this second light beam L2 obliquely with the 3rd light beam L3 that forms a fan-shaped progressive angle.
(3) this first light beam L1, this second light beam L2 and the 3rd light beam L3 by the reflection of the detection region 50 of this image detecting face 5 through these light splitting surfaces 14 and this imaging len 3 to this image detecting element 4, and further calculate the sense of displacement and the displacement of this optical mouse by the circuit unit (sign) of this optical mouse.By this first inclined-plane 11, this second inclined-plane 12 and this cambered surface 16 respectively reflection ray to form the detection region 50 that this first light beam L1, this second light beam L2 and the 3rd light beam L3 are projected to this image detecting face 5, to reach effect as first embodiment.
See also shown in Fig. 4 A, this image detecting face 5 is not provided with the transparent medium 6 as Fig. 4, and the scope that this first light beam L1, this second light beam L2 and the 3rd light beam L3 are projected to this detection region 50 is big, therefore, can guarantee the detecting effect of this image detecting element 4.
See also shown in Figure 5ly, be the utility model the 3rd embodiment.The difference of the 3rd embodiment and second embodiment be this first inclined-plane 11 near this image detecting face 5, this second inclined-plane 12 is near this convex lens 10.So, also can reach effect as first embodiment.
See also shown in Fig. 5 A, this image detecting face 5 is not provided with the transparent medium 6 as Fig. 5, and the scope that this first light beam L1, this second light beam L2 and the 3rd light beam L3 are projected to this detection region 50 is big, therefore, can guarantee the detecting effect of this image detecting element 4.
(utility model characteristics and advantage)
See through the light projection device of optical mouse of the present utility model, have characteristics described as follows:
1, this first light beam vertically is projected to the detection region of this image detecting face, makes the image detecting element of this optical mouse can capture image on this detection region exactly.
2, this second light beam is projected to the detection region of this image detecting face obliquely, make the recess of this detection region and the light and shade at protruding place contrast more obvious, thereby can promote the identification capability of the image detecting element of this optical mouse effectively to this detection region, make this image detecting element can capture image more clearly, thereby make moving of cursor on the display screen more sensitive.
3, the refraction of this cambered surface or formed the 3rd light beam of reflection ray is projected to the detection region of this image detecting face obliquely and between this first light beam and this second light beam to form the light beam of a full angle, make this image detecting element can capture image more clearly.
In sum, the utility model meets the important document of novel patented claim fully, so file an application according to Patent Law.
The above, only be the detailed description and the accompanying drawing of specific embodiment of the utility model, be not in order to restriction the utility model, such as have in the affiliated technical field and know the knowledgeable usually, modify or variation along the equivalence of doing according to spirit of the present utility model, all should be contained in the claim of the present utility model.
Claims (10)
1, a kind of light projection device of optical mouse is characterized in that, comprising:
One light guide body, it has one first inclined-plane, one second inclined-plane and a light splitting surface, and this second inclined-plane and this light splitting surface be corresponding to this first inclined-plane, and this second inclined-plane and this light splitting surface are towards an image detecting face; Wherein
Light enters this light guide body, this local light is reflexed to this light splitting surface by this first inclined-plane and is reflected to form the detection region that one first light beam vertically is projected to this image detecting face by this light splitting surface, and this light of another part is reflexed to this second inclined-plane and is projected to this detection region by this second inclined-plane refraction obliquely to form one second light beam by this first inclined-plane.
2, the light projection device of optical mouse as claimed in claim 1 is characterized in that, this light guide body has a convex lens, and this first inclined-plane is corresponding to this convex lens, and this light enters this light guide body via this convex lens.
3, the light projection device of optical mouse as claimed in claim 1 is characterized in that, this image detecting face to the angle between this first inclined-plane less than this image detecting face to the angle between this second inclined-plane.
4, the light projection device of optical mouse as claimed in claim 1, it is characterized in that, this light guide body has a cambered surface, this cambered surface is connected in this second inclined-plane, this light of another part is reflexed to this cambered surface and is projected to the detection region of this image detecting face by the refraction of this cambered surface obliquely with the 3rd light beam that forms a fan-shaped progressive angle by this first inclined-plane, and the 3rd light beam is between this first light beam and this second light beam.
5, a kind of light projection device of optical mouse is characterized in that, comprising:
One light guide body, it has one first inclined-plane, one second inclined-plane and a light splitting surface, and this light splitting surface is corresponding to this first inclined-plane, and this light splitting surface is towards an image detecting face; Wherein
Light enters this light guide body, this local light is reflexed to this light splitting surface by this first inclined-plane and is reflected to form the detection region that one first light beam vertically is projected to this image detecting face by this light splitting surface, and this light of another part is projected to this detection region by this second inclined-plane reflection obliquely to form one second light beam.
6, the light projection device of optical mouse as claimed in claim 5 is characterized in that, this light guide body has a convex lens, and this first inclined-plane and this second inclined-plane are corresponding to this convex lens, and this light enters this light guide body via this convex lens.
7, the light projection device of optical mouse as claimed in claim 6 is characterized in that, this first inclined-plane is near this convex lens, and this second inclined-plane is near this image detecting face.
8, the light projection device of optical mouse as claimed in claim 6 is characterized in that, this first inclined-plane is near this image detecting face, and this second inclined-plane is near this convex lens.
9, the light projection device of optical mouse as claimed in claim 5 is characterized in that, this image detecting face to the angle between this first inclined-plane less than this image detecting face to the angle between this second inclined-plane.
10, the light projection device of optical mouse as claimed in claim 5, it is characterized in that, this light guide body has a cambered surface, this cambered surface is connected between this first inclined-plane and this second inclined-plane, this light of another part is projected to the detection region of this image detecting face by the reflection of this cambered surface obliquely with the 3rd light beam that forms a fan-shaped progressive angle, and the 3rd light beam is between this first light beam and this second light beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200027674U CN2789830Y (en) | 2005-03-08 | 2005-03-08 | Light ray projecting device for optical mouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200027674U CN2789830Y (en) | 2005-03-08 | 2005-03-08 | Light ray projecting device for optical mouse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2789830Y true CN2789830Y (en) | 2006-06-21 |
Family
ID=36790164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200027674U Expired - Fee Related CN2789830Y (en) | 2005-03-08 | 2005-03-08 | Light ray projecting device for optical mouse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2789830Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100378633C (en) * | 2005-03-07 | 2008-04-02 | 培新科技股份有限公司 | Ray projection method and device of optical mouse |
-
2005
- 2005-03-08 CN CNU2005200027674U patent/CN2789830Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100378633C (en) * | 2005-03-07 | 2008-04-02 | 培新科技股份有限公司 | Ray projection method and device of optical mouse |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060621 |