TWI275985B - Method and apparatus for light projection of optical mouse - Google Patents

Abstract

The present invention is a method and an apparatus for light projection of an optical mouse, where the light projection method comprises the following steps: (1) provide a light projection apparatus; and (2) project light into the light projection apparatus to form a first light beam, projecting vertically onto a detecting area of an image detecting surface and capable of allowing an image detector of the optical mouse to precisely capture the images on the detecting area, and a second light beam projecting onto the detecting area at an inclined angle and capable of enhancing the light contrast at the convex and concave parts in the detecting area so as to effectively improve the discrimination capability of the image detector of the optical mouse towards the detecting area.

Description

1275985, Nine, invention description: [Technical field of invention] A light projection method and device, especially a light projection method and device for an optical mouse. [Prior Art] When the optical mouse is moved on an image detecting surface, the optical mouse 耩 detects the image of the concave and convex portions on the image of the image by the image debt detecting component, and further The displacement of the optical mouse is calculated by the circuit unit to calculate the displacement direction and displacement of the optical mouse, so that it can move a cursor on a display screen. Referring to the first figure, the conventional optical mouse includes a light projecting device 8, a light source 2, an imaging lens 3, an image detecting element 4, and the like. The light projection device 8 includes a light guiding body having a convex lens surface 80, a first inclined surface 81, a second inclined surface 82, and a light exiting surface 83. The first inclined surface 81 corresponds to the convex lens surface 8 〇, and the second inclined surface 82 corresponds to the first inclined surface 81. The light emitting surface corresponds to the first inclined surface 82 and faces an image detecting surface 5. The image recording surface 5 is provided with a transparent medium 6 (e.g., - glass). The light of the light source 2 enters the light guiding body via the convex lens surface f 0 , and the light is reflected by the first inclined surface 81 and is reflected by the second inclined surface 8 2 - the light beam L is obliquely transmitted to The transparent medium 6. The light beam L passes through the transparent medium 6 and is obliquely (four) the image side 5 . Since the position of the light beam L to the image detecting surface 5 is not located at 5 〇 ' of the image capturing light mji formed by the imaging lens 3 and the image detecting element 4, the image sensing component 4 cannot be accurate. Ground 5 1275985 captures the image on the detection area 50 of the image detection surface 5. As a result, when the optical mole is moved on the image detecting surface 5, the movement of the cursor on the display screen is not sensitive enough to even move the cursor on the display screen.

Referring to the second figure, another optical mouse includes a light projection device 9, a light source 2, an imaging lens 3, an image detecting element 4, and the like. The ray-projecting device 9 includes a 〆 light guiding body having a convex lens surface 90, a first inclined surface 9i, a light exiting surface 93, and a light splitting surface 94. The first inclined surface 9 1 corresponds to the convex lens surface 9 〇, and the light emitting surface 9 3 corresponds to the first inclined surface 9 丄 , and the light splitting surface 9 4 corresponds to the light emitting surface 9 3 and the first inclined surface 9 1 . An opening 9 5 is formed between the surface 94 and the light-emitting surface 9 3 toward an image detecting surface 5, and the light-splitting surface 94 faces the image detecting surface 5. The image detecting surface 5 is provided with a transparent medium 6 (such as a glass). The light from the light source 2 enters the light guiding body through the convex lens surface 9 , and the light is reflected by the first inclined surface 9 1 to the light splitting surface 94 and is reflected by the light splitting surface 94 to form a light beam L vertically transmitted thereto. Transparent medium 6. The light beam L passes through the transparent medium 6 and is vertically projected to the detection area 5 of the image detecting surface 5.

Since the position of the light beam L intersecting the image detecting surface 5 is located in the imaging lens 3 and the imaging area 50 formed by the image scorpion element 4, the sizing element 4 can be quasi-image ==, measuring surface 5 The image on the detection area 5 〇. However, the image is pre-measured = 々 surface, when the light beam L is projected perpendicularly to the shadow, the shadow of the shadow side of the image side 5 and the convexity of the convex portion of the image side 5 are increased. The movement of the cursor on the knot is (4) sensitive, especially when the first = high = 1275985*, it is more difficult to control the movement of the cursor. Need to be improved. , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , k is a reasonable design and effective improvement [Summary of the Invention] [Object of the Invention] The main object of the present invention is to provide: square === the mouse is moved to the shadow; SUMMARY OF THE INVENTION One step = mainly provides optical projection (a) to provide a ray projection device; and beam and ϋΐΓ ΓΓΐ ΓΓΐ line projection device to form a first light thin region, the second light beam obliquely projected to the fairy The purpose of the present invention is mainly to provide an optical, bone projection device comprising: a light guiding body having a first t:: ~ bevel, and a beam splitting surface, the second bevel a younger ~ beveled surface, and the second inclined surface and the light splitting surface ^ first surface correspond to the middle light guiding body, and the local money is reflected by the first oblique 7 1275985 to the light splitting surface and reflected by the light splitting surface To form a three-sided detection region, the other portion of the light is obliquely projected by a second beam to the motion-slope refracting to form a zero. To achieve the above object, the present invention is mainly to provide an optically sliding Light throwing, including - light guide Body surface, and - splitting surface, the beam splitter surface corresponds to the inclined surface and the first surface is facing the - image detection plane; wherein

The light rays are reflected by the first bevel to the spectroscopic surface; and: the: = surface, the shot (10) is perpendicularly projected to the detection area of the side of the image. The other part of the light is reflected by the second bevel to form A second beam is obliquely projected onto the detection zone. By projecting the first light beam perpendicularly to the detection area of the image fingerprint measuring surface, the image element of the optical mouse can accurately capture the image on the side area; #projected obliquely by the second light beam The detection area of the image fingerprint measurement surface makes the contrast between the concave and convex portions of the detection area more obvious, thereby effectively enhancing the identification of the detection area of the optical mouse component of the optical mouse. ability. [Embodiment] In order to further clarify the technical means and effects of the present invention for achieving the intended purpose, reference should be made to the following detailed description of the invention and the accompanying drawings. The invention is to be understood as being limited and not limited by the description. [Detailed Description] Please refer to the third figure, which is a first embodiment of the present invention. The invention is a light projection device of a light mouse, a light projection device, a light ray 9 and a device. The optical mouse includes a measuring element 4 and the like. The imaging lens 3, and an image reconnaissance method, the steps of the light projection method include: (1) deducting a light projection device. Body, mouse light projection device 1 includes - light guide

The lenticular lens surface i 〇, a first body / the light guiding body - the light emitting surface 13, and the light splitting surface / 4; 乂 # - the inclined surface 12, and the front surface 14 . The preceding line projected to the spectroscopic surface 4 can be reflected by the spectroscopic surface i 4 or can be transmitted out of the spectroscopic surface i 4 . The first bevel surface 1Q, the second bevel surface, the light exit surface U, and the spectroscopic surface 14 form an opening 15 corresponding to the first slope 12 and the spectroscopic surface to 2 = the measuring surface 5, and the second inclined surface 2 and the dichroic surface i 4 face the image detecting surface 5. The image detecting surface 5 may be provided with a transparent medium 6 (such as a glass). 5: The angle α between the first inclined surface 11 is smaller than the angle between the image 4 measuring surface 5 and the second inclined surface 1 2 (2) Projecting light into the light projection device 1 to form a first light beam L1 and a second light beam L2, the first light beam L1 is vertically projected to the detection area 50 of the image detecting surface 5, and the second light beam L 2 is obliquely projected to the detecting area 5 〇. The light of the light source 2 enters the light guiding body through the convex lens surface 1 , and the light of the local light source 2 is reflected by the first inclined surface 11 through the light emitting surface 13 to the light splitting surface 14 and is separated by the light splitting surface. 2 4 reflection to form a first light beam l1 is perpendicularly transmitted to the transparent medium 9 0 ^ 0 ^ 1275985 image beam L 1 through the transparent The material 6 is perpendicularly projected to the detection area 5 of the r. Another part of the light source 1 1 of the light source 2 is reflected to the second slope 12 and is the second slope 6. The = formation - second light The device 2 is obliquely transmitted to the transparent medium detecting region. The light beam L 2 passes through the transparent medium 6 and is obliquely projected to the optical mouse of the present invention. The 1 1 v first body further has a curved surface 1β, which is isolated. Between the second inclined surface 1 2 and the light-emitting surface 1 3, the light of the light source 2 is refracted by the first inclined surface i by the curved surface i 6 to form a fan-shaped 1 bundle. Shooting to the image detecting surface 5 ^ “ “ “ 弟 弟 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二L 3 is detected by the image, then the end L 2 , and the third: 14, :== way unit (not labeled) wheel optics, please refer to the third picture and the third B picture to project to the image The detecting area 5 of the detecting surface 5; 苐; 1 is vertically located on the imaging lens 3 and the image _ == 贞, 50 is taken on the optical axis X, so that the optical, Αβ 4 forms an image 撷Accurately dig the image Face = can project the two beams L·2 obliquely to the shadow image of the shadow Jun 0. The marriage area 50 of the first image of the image _ face 5, respectively, produces a shadow effect and a reflection of the fairy n Q 1 and the convex portion 5 0 2 first action, therefore, the contrast between the concave 5 Ο 1 and the convex 5 〇 2 of the detection area 50 of the image m 5 1275985 is more obvious, so that the image of the optical mouse can be effectively enhanced The detecting component 4 has the ability to recognize the detecting area 50. When the optical mouse is moved on the image detecting surface 5, the image detecting component 4 can capture a clearer image' The movement of the cursor on the display screen is more sensitive. The third light beam L 3 is interposed between the first light beam 11 and the second light beam 12 to form a full-angle light beam, so that the image detecting component 4 can capture a clearer image.

Please refer to the second C picture, the image detecting surface 5 is not provided with the third image = transparent medium 6 'the first light beam L1, the second light beam L2, and the third light beam L 3 projected onto the image detecting surface 5 The fan type like m 5 大 is large, and therefore, the detection efficiency of the image detecting element 4 can be ensured. The fourth month of the present invention is shown in the fourth figure as the second embodiment of the present invention. The steps of the light projection method of the optical mouse of the present invention include: (1) providing a light projection device 1.

The optical mouse of the present invention projects light rays, the imaging lens? It can be used to identify the external broadcast I and the light-conducting body. The light guiding body has a convex lens surface working, a first inclined surface 11, a first-side surface, a light-emitting surface 13 and a combination! The first inclined surface 12, the line can be divided into 1 minute ^ 1 4 . The light ray of the dividing wire 14 is reflected by the surface 14 or can be transmitted out of the beam dividing surface 4. 11 1 〇: 1 and the second oblique 273 correspond to the convex lens surface 2 J = surface 13 corresponds to The first inclined surface 11 and the second inclined surface 3 1 correspond to the first inclined surface 11 and the light emitting surface 1 4 nl # ^ ^ and the light emitting surface 1 3 form an H port 1 5 toward 5 且 and The splitting surface 14 faces the shadow (4) measuring surface 65. The shirt detecting surface 5 can be provided with a transparent surface such as 1275985. The angle between the image detecting surface 5 and the first inclined surface 11 is smaller than the image detecting. An angle 厶 between the face 5 and the second slope 1 2. The first slope = 1 1 is close to the convex lens surface i 0 , and the second slope i 2 is close to the shadow measuring surface 5. ' (2) Projecting light into the The light projection device 1 is configured to form a first light beam L 1 and a second light beam L 2 . The first light beam L i is vertically projected to the detection area 50 of the image detecting surface 5 , and the second light beam 12 is obliquely Projected to the detection zone 5 As shown in the fourth figure, the light of the light source 2 enters the light guiding body through the convex lens surface working, and the local light of the light source 2 is reflected by the first inclined surface 1 through the light emitting surface i 3 to the splitting light. The surface i 4 is reflected by the spectroscopic surface 丄 4 to form a first light beam 11 vertically transmitted to the transparent medium 6. The first light beam L 1 passes through the transparent medium 6 and is vertically projected onto the image defect measuring surface 5 _ measuring area 5 Q. The other-partial light source 2 is reflected by the second inclined surface 12 to form a second light red 2 obliquely transmitted to the transparent medium 6. The second light beam L2 passes through the transparent medium 6 and Projecting obliquely to the detection area 50. As shown in the fourth figure, the light guiding device of the optical mouse of the optical mouse of the present invention further has an arc w6, and the arc surface i 6 is connected thereto. Between the first bevel 1 1 and the second bevel 1 2. Further, the local light of the light source 2 is reflected by the curved surface 16 to form a third progressive light beam L 3 of the fan shape obliquely projected to the image detection a detection area 5 面 of the face 5, the second light beam L 3 being between the first light beam 11 and the second light beam L 2 - (c) the first beam L1, the second beam L2, and the third beam L3 are reflected by the moving m5 Q of the image detecting surface 5 through the beam splitting 12 1275985 face 14 and the imaging lens 3 The image detecting component 4, and further calculating the displacement direction and the displacement amount of the optical mouse by the optical unit (not labeled) of the optical mouse. The first inclined surface 1 1 and the second inclined surface 12 And the curved surface 16 respectively reflects light to form the first light beam l1, the second light beam L2, and the third light beam L3 are projected onto the image detecting surface; 5 detecting area 5 以, to achieve the first The efficacy of the examples. • As shown in FIG. 4A, the image detecting surface 5 is not provided with a transparent medium 6 as shown in FIG. 4, the first light beam L1, the second light beam L2, •, the third light beam L3. The range of projection to the detection area 50 is large, and therefore, the detection efficiency of the image detecting element 4 can be ensured. The eye tea is shown in the fifth figure and is the third embodiment of the present invention. The difference between the third embodiment and the second embodiment is that the first slope 11 is close to the image detecting surface 5 ′ and the second slope 1 2 is close to the convex lens surface 1 〇. Thus, the efficacy as in the first embodiment can also be achieved. Referring to FIG. 5A, the image detecting surface 5 is not provided with a fifth medium, the clear medium 6, the first light beam L·1, the second light beam L·2, • the third light beam. The range in which the L 3 is projected to the detection area 5 大 is large, and therefore, the detection efficiency of the image detecting element 4 can be ensured. '[Features and advantages] The method and apparatus for illuminating the optical mouse through the present invention have the following characteristics: zone, 1=, the f-beam is vertically projected onto the image detection surface Test 2' enables the optical mouse's image detection component to accurately capture images on the extracted area. 2. The second light beam is obliquely projected to the detection of the image detection surface 13 1275985 =, so that the contrast between the concave and convex portions of the detection area is more obvious, so that the optical mouse can be effectively improved The image detecting component recognizes/speeds the detection area, so that the image detecting component can capture a clearer image, thereby making the movement of the cursor on the display screen more sensitive. ^3, the third light beam formed by the curved surface refracting or reflecting light is obliquely projected to the detection area of the image detecting surface and between the first light beam and the second light beam to form a full-angle light beam, Make the image a sharper image. In summary, the present invention fully complies with the requirements of the invention patent application, and the friend proposes a towel according to the patent law. Please check and ask for an early A, quasi-reversal to protect the inventor (4). If you are in doubt, please do not hesitate to give instructions. 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The change m contains the special purpose of the invention. [Simple description of the diagram] The cross-section of the application of the light projection device of the optical mouse is shown in the second figure. The third image of the application of the optical projection of the optical mouse is the third picture of the tree. Schematic diagram of the cross section used for feeding. The second embodiment of the second embodiment is a magnified view of the third part of the third figure. The second B diagram is an enlarged view of the portion of the third diagram b. 1275985 The third c is a schematic cross-sectional view showing another application of the first embodiment of the light projecting device of the optical mouse of the present invention. Fig. 4 is a schematic cross-sectional view showing the application of the second embodiment of the light projecting device of the optical mouse of the present invention. Figure 4A is a schematic cross-sectional view showing another application of the second embodiment of the light projecting device of the optical mouse of the present invention. Fig. 5 is a schematic cross-sectional view showing the application of the third embodiment of the light projecting device of the optical mouse of the present invention. _ Fifth A is a schematic view of a brake surface of another application of the third embodiment of the optical projection device of the optical mouse of the present invention. [Main component symbol description] [Conventional] Light projection device 8 convex lens surface 80 first inclined surface 81 second inclined surface 82 light emitting surface 83 light projection device 9 convex lens surface 9 0 first inclined surface 9 1 light emitting surface 9 3 light separating surface 9 4 opening 9 5 Light source 2 Beam L Imaging lens 3 Image detection component 4 Image detection surface 5 15 1275985 Detection area 50 Transparent medium 6 Image capture optical axis X [Invention] First slope 11 Light exit surface 13 Opening 15 Angle α Light Projection device 1 convex lens surface 10 second slope 12 split surface 14 arc surface 16 angle β light source 2 first light beam L 1 third light beam L 3 second light beam L 2

Imaging lens 3 Image detection component 4 Image detection surface 5 Detection area 5 0 Convex 5 0 Transparent medium 6 Image capture optical axis X Concave 5 0 1 16

Claims (1)

Ϊ 275985 X. Patent application scope: 1. A method for projecting light of an optical mouse, the steps comprising: (1) providing a light projection device; and (2) projecting light into the light projection device to form a first light beam and a The second light=the first light beam is vertically projected to the detection area of an image detection surface, and the second light beam is obliquely projected to the detection area. 2. The optical projection method of the optical mouse according to claim 1, wherein the step (3) the first beam and the second beam are reflected by the detection region of the image detecting surface through an imaging lens The image detecting component is located on the imaging lens and the image capturing optical axis formed by the imaging lens and the image detecting component. 3. The method according to claim 1, wherein the ray projection device has a first slope, a second slope, and a beam splitting surface, the local light being the first slope Reflected to the spectroscopic surface and reflected by the spectroscopic surface to form the first beam, the other portion of the light is reflected by the first bevel to the second bevel and refracted by the second bevel to form the second beam. 4. The light projection method of the optical mouse according to claim 3, wherein an angle between the image detecting surface and the first inclined surface is smaller than an angle between the image detecting surface and the second inclined surface. . 5. The method according to claim 3, wherein the ray casting device has a curved surface, the curved surface is connected to the second inclined surface, and the partial light is further divided by the first a third light beam that is reflected by the inclined surface and is refracted by the curved surface to form a fan-shaped progressive angle is obliquely projected to the detection area of the image detecting surface, and the third light beam is between the light beam of the 17 1275985 and the Between the second beams. 6. The optical method of optical mouse according to claim 5, wherein the step comprises: (3) detecting the first beam, the second beam, and the second beam by the image detecting surface The region is reflected through the spectroscopic surface and an imaging lens to an image detecting element. 7. The method according to claim 1, wherein the ray casting device has a first bevel, a second bevel, and a spectroscopic surface. A bevel is reflected to the sub-wire and reflected by the spectroscopic surface to form the first beam, and the other portion of the light is reflected by the second bevel to form the second beam. 8. The method according to claim 7, wherein the angle between the image detecting surface and the first slope is smaller than the angle between the image detecting surface and the second slope. angle. 9. The ray casting method of the optical mouse according to claim 7, wherein the ray casting device has a curved surface connected between the first inclined surface and the second inclined surface, The third light beam, which is partially reflected by the arc surface to form a fan-shaped progressive angle, is obliquely projected to the detection area of the image detecting surface, and the third light beam is interposed between the first light beam and the young light beam between. 10. The illuminating method of the optical mouse according to claim 9 of the patent application, the method comprising the steps of: (3) detecting the first beam, the second beam, and the second beam by the image detecting surface The measuring area is reflected through the spectroscopic surface and an imaging lens to an image detecting element. 1 . A light projection device for an optical mouse, comprising: a light guiding body having a first inclined surface, a second inclined surface, and a 18 1275985 spectroscopic surface, wherein the second inclined surface and the spectroscopic surface correspond to the a first inclined surface, wherein the second inclined surface and the light splitting surface face an image defect measuring surface; wherein light enters the light guiding body, and the local light is reflected by the first inclined surface to the light splitting surface and is reflected by the light splitting surface to form A first light beam is vertically projected onto the detection area of the image detecting surface, and another portion of the light is reflected by the first inclined surface to the second inclined surface and is refracted by the second inclined surface to form a first light beam obliquely projected To the detection area. 12. Optical light of the optical mouse as described in claim 1 The line projection device, wherein the light guiding body has a convex lens surface, and the first inclined surface corresponds to the convex lens surface, and the light enters the light guiding body via the convex lens surface. The optical projection device of the optical mouse according to claim 1 , wherein the angle between the image Φ and the first inclined surface is smaller than the angle between the image surface and the second slope Cool angle. 14. The optical device of claim 1, wherein the light guiding body has a curved surface, and the curved surface is connected to the second axis® I The first bevel is reflected to the arc: the third beam is diffracted to form a sector-shaped progressive angle between the first beam and the second beam. The optical projection device of the optical mouse comprises: a light guiding body having a _th-slope, a second slope, and a beam splitting surface, wherein the beam splitting surface corresponds to the $ 'shadow (four) measuring surface; Wherein the beveled surface, and the spectroscopic surface enters the material toward the light, and the partial_Nylay P slope is opposite to the surface of the knife and is reflected by the spectroscopic surface to form a first beam perpendicularly to the The scene is like a detection area of the detection surface, and another part of the light is reflected by the first slope to form a second beam obliquely projected to the detection area. The light-emitting optical body of the optical mouse according to claim 15 wherein the light guiding body has a convex lens surface, and the first inclined surface and the second oblique surface (four) are applied to the convex lens Φ. The light impurity enters the light guiding body by the convex lens surface. The linear projection "the optical surface of the optical mouse as described in the specification is close to the image detection 3 obliquely close to the convex lens surface, and the second oblique line casts iL as follows: = the light slope of the light as described in item 16: The optical surface of the optical mouse of the fifteenth item is smaller than the angle between the image surface and the first inclined surface. =: ! The angle between the two slopes. The line projection device, 11^ the light of the optical mouse according to the fifteenth patent range, the first -34=light guiding body has a curved surface, the curved surface is connected to the surface reflection to form a $ y inclined surface, and yet another The local light is obliquely projected between the second light beams by the third light beam produced by the progressive angle of the image detecting surface of the arc. The third beam is between the first beam and the 20