CN102902417A - Optical touch module and liquid source module thereof - Google Patents
Optical touch module and liquid source module thereof Download PDFInfo
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- CN102902417A CN102902417A CN2011102099465A CN201110209946A CN102902417A CN 102902417 A CN102902417 A CN 102902417A CN 2011102099465 A CN2011102099465 A CN 2011102099465A CN 201110209946 A CN201110209946 A CN 201110209946A CN 102902417 A CN102902417 A CN 102902417A
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Abstract
The invention relates to an optical touch module and a liquid source module thereof. The optical touch module is arranged on a reference plane, and is provided with a sensing area; the optical touch module comprises a first light sensing element and a light source module; the sensing area is provided with a first lateral edge and a second lateral edge, which are opposite; the first light sensing element is arranged at the first lateral edge of the sensing area, and a first sensing surface of the first light sensing element faces to the sensing area; the light source module comprises a linear light source, a transparent board and a reflection piece; the linear light source is arranged beside the second lateral edge of the sensing area, is located beside the first surface of the transparent board, and provides light to the sensing area; the transparent board is arranged between the linear light source and the second lateral edge; an included angle between the transparent board and the reference plane is an acute angle; and the transparent board reflects a part of light, and the other part of the light passes through the transparent board; the reflection piece is arranged beside the second surface of the transparent board, so that light from the transparent board is reflected back to the transparent board. Compared with the prior art, the optical touch module and the light source module have the advantages that the light sensing element senses optical information by controlling whether the linear light source of the light source module emits light or not, and a blind area can be prevented from being generated.
Description
Technical field
The invention relates to a kind of touch-control module, and particularly relevant for a kind of optical touch-control module and light source module thereof.
Background technology
In recent years, adopt the man-machine interface of touch-control input or writing technology because of directly perceived than other man-machine interface, so favored by the consumer, become the electronic product that relevant manufacturer actively imports application.Common touch-control module has electric resistance touch-control module, capacitive touch-control module and optical touch module etc. at present, and wherein optical touch module has lower-cost advantage.
Fig. 1 is the structural representation of existing a kind of optical touch-control module.Please refer to Fig. 1, existing optical touch-control module 100 comprises leaded light group 110, light-emitting component 120 and optical sensor 130.Wherein, leaded light group 110 comprises two light-strip 112a, 112b and stripe mirror (mirror) 114.Light-strip 112a, 112b and stripe mirror 114 are arranged along three limits of rectangular path, and wherein light-strip 112a is relative with stripe mirror 114, and light-strip 112b is connected between light-strip 112a and the stripe mirror 114, and the zone in the above-mentioned rectangular path is sensing area 116.In addition, light-emitting component 120 is arranged between light-strip 112a and the light-strip 112b adjacent both ends, and in order to provide light to light-strip 112a and light-strip 112b.Light-strip 112a, 112b convert linear light sorurce in order to the light that light source is provided, to shine whole sensing area 116 by linear light sorurce.In addition, optical sensor 130 is arranged on by the light-strip 112a, and the visual field of optical sensor 130 (Field of View, FOV) contains whole sensing area 116.
Hold above-mentionedly, optical sensor 130 is used in the detecting sensing area 116 whether shade being arranged, and calculates the position of shade.In more detail, the touch point in the sensing area 116 (being shade) A produces mirror point A1 via stripe mirror 114, and optical sensor 130 can detect dim spot A2, A3.Like this, can be calculated apart from d1, d2, and cooperate other known parameter can calculate the position (coordinate) of touch point A.The parameter that above-mentioned other is known comprises that sensing area 116 equals mirror point A1 to bee-line of stripe mirror 114 etc. in the length of X-axis, sensing area 116 in the width of Y-axis, touch point A to the bee-line of stripe mirror 114.Be common knowledge in the affiliated technical field relevant for detailed Coordinate calculation method, will do not describe in detail at this.
But there is certain blind area (Blind Zone) 150 in existing optical touch-control module 100, the zone of blind area 150 between dotted line 151 and stripe mirror 114.The meaning of blind area 150 is the zones that can't accurately calculate touch point coordinate.For instance, the touch point B in the sensing area 116 just is positioned at blind area 150, and dim spot B2, B3 that the touch point that this moment, optical sensor 130 detected and mirror point B1 thereof produce can overlap, and so can't accurately calculate the coordinate of touch point B.
Summary of the invention
The invention provides a kind of optical touch-control module that can dead zone-eliminating.
The present invention provides a kind of light source module that is applied to above-mentioned optical touch-control module in addition, to eliminate the blind area of optical touch-control module.
A kind of optical touch-control module is arranged on the reference planes, and has sensing area, it is characterized in that: this optical touch-control module comprises the first Photosensing Units and light source module; This sensing area comprises first side and second side, and this second side is relative with this first side; This first side comprises first end, and this first Photosensing Units is located at this first end, and the first sensing face of this first Photosensing Units is towards this sensing area; This light source module comprises line source, transparent panel and reflecting element.This line source is located at by the second side of this sensing area, and this line source is suitable for providing light to this sensing area; This transparent panel is located between this line source and this second side, and angle is acute angle between this transparent panel and this reference planes; This transparent panel has relative first surface and second surface, and this line source is positioned at by this first surface, and this transparent panel is suitable for reflecting part light and part light is passed through; This reflecting element is arranged on by this second surface, and the light reflection that this reflecting element will reflect from this transparent panel returns this transparent panel.
In an embodiment of the present invention, the first surface of above-mentioned transparent panel and line source are relative with whole second side, and reflecting element is relative with the second surface of transparent panel.
In an embodiment of the present invention, above-mentioned optical touch-control module further comprises the second Photosensing Units, is located at the second end of first side, and the second sensing face of the second Photosensing Units is towards sensing area.
In an embodiment of the present invention, first paragraph and second segment are divided in above-mentioned second side, contiguous the first Photosensing Units of first paragraph, and line source and transparent panel are relative with whole first paragraph, and reflecting element is relative with whole second surface.
In an embodiment of the present invention, above-mentioned optical touch-control module further comprises level crossing, be located at by the line source, and relative with second segment, the minute surface of level crossing is perpendicular to reference planes.
In an embodiment of the present invention, above-mentioned transparent panel is plastic sheet or glass sheet.
In an embodiment of the present invention, above-mentioned transparent panel and the acute angle between the reference planes are 45 degree, and line source has exiting surface, and the angle between first surface and the exiting surface is 45 degree, and the angle between reflecting element and the second surface is 45 degree.
In an embodiment of the present invention, above-mentioned reflecting element is level crossing.
In an embodiment of the present invention, above-mentioned reflecting element comprises transparent base and a plurality of reflective prism.Transparent base has the 3rd relative surface and the 4th surface, and the 3rd surface is to transparent panel.A plurality of reflective prisms are located at the 4th surface.
In an embodiment of the present invention, above-mentioned reflective prism comprises a plurality of triangular prisms of being arranged in parallel or a plurality of pyrometric cones of arrayed.
In an embodiment of the present invention, above-mentioned line source comprises pointolite and light-strip, and pointolite is arranged on by the incidence surface of light-strip, and the exiting surface of line source is a surface of light-strip.
In an embodiment of the present invention, above-mentioned optical touch-control module comprises at least one reflecting strips, and this reflecting strips is located at the edge of sensing area.
In an embodiment of the present invention, above-mentioned optical touch-control module comprises at least one pointolite, and this pointolite is located at the edge of sensing area.
The present invention proposes a kind of light source module in addition, and it is arranged on the reference planes, and light source module comprises line source, transparent panel and reflecting element.Folder one acute angle between transparent panel and the reference planes, and have relative first surface and second surface.Line source is positioned at by the first surface, and transparent panel is used for reflecting part light and part light is passed through.Reflecting element is arranged on by the second surface, and the light reflection that reflecting element will reflect the self-induced transparency plate returns transparent panel.
Beneficial effect of the present invention: in optical touch-control module of the present invention and light source module, line source that can be by controlling light source module whether luminous, make Photosensing Units sense the optical information that optical information that shade produces and the shade virtual image produce, and then avoid the generation of blind area.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the structural representation of existing a kind of optical touch-control module.
Fig. 2 is the synoptic diagram of the optical touch-control module of the embodiment of the invention.
Fig. 3 is the diagrammatic cross-section of the light source module of Fig. 2.
Fig. 4 is the synoptic diagram of the reflecting element of another embodiment of the present invention.
Fig. 5 is the synoptic diagram of the optical touch-control module of another embodiment of the present invention.
Fig. 6 is the synoptic diagram of the optical touch-control module of another embodiment of the present invention.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to the optical touch-control module of foundation the present invention proposition and embodiment, structure, feature and the effect of light source module thereof, be described in detail as follows.
Fig. 2 is the synoptic diagram of the optical touch-control module of one embodiment of the invention, and Fig. 3 is the diagrammatic cross-section along the light source module of the A-A line of Fig. 2.Please refer to Fig. 2 and Fig. 3, the optical touch-control module 200 of present embodiment is arranged on the reference planes 50, and has sensing area 210.Sensing area 210 shapes can be rectangles, but not as limit.Optical touch-control module 200 comprises the first Photosensing Units 220 and light source module 230.The first Photosensing Units 220 is located at the first end 211a of the first side 211 of sensing area 210, and the first sensing face 221 of the first Photosensing Units 220 is towards sensing area 210, and light source module 230 is located at 213 sides, second side of sensing area 210, and wherein second side 213 is relative with first side 211.
Hold above-mentionedly, optical touch-control module 200 may further include at least one light source 250, and this light source 250 is located at the edge of sensing area 210.In the present embodiment, the quantity of light source 250 is two, and each light source 250 is take line source as example, but does not limit its kind herein, and the quantity of light source 250 is also decided by actual demand.Particularly, one of them light source 250 is arranged on the 3rd side 214 between first side 211 and second side 213, and another light source 250 is arranged on first side 211, and the 3rd side 214 is near the second end 211b of first side 211.Light source 250 is in order to provide from the light of exiting surface 252 outgoing, to shine whole sensing area 210.Each light source 250 can be the combination of light-strip and pointolite (such as light emitting diode), and adjacent two light sources 250 also can be shared a pointolite.
In the present embodiment, light source module 230 comprises line source 231, transparent panel 232 and reflecting element 233.Line source 231 is located at 213 sides, second side of sensing area 210, and line source 231 is used to provide light to sensing area 210.Transparent panel 232 is located between line source 231 and the second side 213, and the angle between transparent panel 232 and the reference planes 50 is acute angle theta.Transparent panel 232 has relative first surface 232a and second surface 232b, and line source 231 is positioned at by the first surface 232a.Transparent panel 232 is used for reflecting part light and part light is passed through.Reflecting element 233 is arranged on by the second surface 232b, and reflecting element 233 is used for the light reflection of reflection self-induced transparency plate 232 is returned transparent panel 232.
Above-mentioned transparent panel 232 can be plastic sheet, glass sheet, also can be the material of other light-permeable.This transparent panel 232 can not need be coated with the material of semi-penetration semi-reflective.Reflecting element 233 is preferably level crossing, but not as limit.Preferably, line source 231 comprises pointolite 236 and light-strip 237, and pointolite 236 is arranged on by the incidence surface 237a of light-strip 237, and the exiting surface 237b of line source 231 is the surface of light-strip 237.Particularly, the exiting surface 237b of line source 231 is towards sensing area 210, and pointolite 236 is arranged on an end of second side 213.Pointolite 236 provides light to light-strip 237, and light-strip 237 makes light that pointolite 236 provides from exiting surface 237b outgoing.When pointolite 236 is opened, can be by transparent panel 232 and directive sensing area 210 from the part light L1 of the exiting surface 237b outgoing of line source 231.When pointolite 236 is closed, the part light L2 that light source 250 provides is reflexed to reflecting element 233 by transparent panel 232, and will reflecting the light reflection of self-induced transparency plate 232, reflecting element 233 returns transparent panel 232, and part is reflected back toward the light L3 of transparent panel 232, is reflected back sensing area 210 by transparent panel 232.That is to say that when pointolite 236 was closed, reflecting element 233 can be in order to provide mirror face function.
For eliminating the described blind area of background technology, present embodiment is divided into first paragraph 213a and second segment 213b with second side 213, contiguous the first Photosensing Units 220 of first paragraph 213a, and the zone 217 between first paragraph 213a and the dotted line 216 is the blind area in the background technology.Namely, first paragraph 213a is the zone that correspondence may produce the blind area.In addition, 230 of light source modules are arranged on by the first paragraph 213a, wherein the first surface 232a of transparent panel 232 and line source 231 are relative with whole first paragraph 213a, and reflecting element 233 is relative with the second surface 232b of transparent panel 232, so reflecting element 233 is also relative with whole first paragraph 213a.In addition, acute angle theta between transparent panel 232 and the reference planes 50 is preferably 45 degree, and the angle α between first surface 232a and the exiting surface 237b is 45 degree preferably, and the angle β between reflecting element 233 and the second surface 232b is preferably 45 degree, and namely the reflecting surface 233a of reflecting element 233 is perpendicular to exiting surface 237b.In addition, optical touch-control module 200 may further include level crossing 270, and it is other to be located at line source 231, and relative with second segment 213b, and namely level crossing 270 is located at second segment 213b.Preferably, the minute surface 272 of level crossing 270 is perpendicular to reference planes 50.
In the present embodiment, whether luminous by line source 231, can obtain enough optical information, to eliminate blind area of the prior art.Particularly, when shade O(such as finger) when the zone is controlled in 217, whether luminous according to line source 231, the first Photosensing Units 220 can sense respectively in the sensing area 210 shade O and via the formed optical information of reflecting element 233 formed shade virtual image O '.Namely, when pointolite 236 was opened, line source 231 can be luminous, and the optical information that the first Photosensing Units 220 meeting sensing shade O produce, the i.e. position of dim spot C1.On the other hand, when pointolite 236 was closed, line source 231 was not luminous, and the optical information that the first Photosensing Units 220 sensing reflecting elements 233 formed shade virtual image O ' produce, the i.e. position of dim spot C2.Therefore, by opening and closing pointolite 236, the first Photosensing Units 220 is sequentially sensed by the position of the formed dim spot C1 of shade O and by the position of the formed dim spot C2 of shade virtual image O ', to obtain enough optical information.So, can calculate by the position of dim spot C1 and C2 the correct coordinates of shade O, so the optical touch-control module 200 of present embodiment can be eliminated blind area of the prior art, and then the sensing precision of improving optical touch-control module 200.
In addition, although above-mentioned reflecting element 233 is take level crossing as example, the present invention does not limit reflecting element 233 and is required to be level crossing.For instance, as shown in Figure 4, reflecting element 233 ' can comprise transparent base 238 and a plurality of reflective prism 239.Transparent base 238 has the 3rd relative surperficial 238a and the 4th surperficial 238b, and the 3rd surperficial 238a is in the face of transparent panel.A plurality of reflective prisms 239 are located at the 4th surperficial 238b, and these reflective prisms 239 for example are a plurality of triangular prisms that are arranged in parallel.In addition, in another embodiment, also can replace these triangular prisms with a plurality of pyrometric cones of arrayed.
Should be noted that when optical touch-control module 200 only comprised first Photosensing Units 220, light source module 230 also can that is to say that along whole second side 213 level crossing 270 can be replaced by light source module 230.In another embodiment, when optical touch-control module comprised two Photosensing Units, light source module can arrange along whole second side 213, below will illustrate for an embodiment.
Figure 5 shows that the synoptic diagram of the optical touch-control module of another embodiment of the present invention.Please refer to Fig. 5, compared to optical touch-control module 200, the optical touch-control module 200 ' of present embodiment has further comprised the second Photosensing Units 280, and light source module 230 ' is arranged on whole second side 213, and the level crossing 270 in the optical touch-control module 200 then is omitted.In addition, the four side 215 of sensing area 210 for example is provided with another light source 250(such as line source), to provide light towards sensing area 210.Specifically, the second Photosensing Units 280 is arranged on the second end 211b of first side 211, and the second sensing face 281 of the second Photosensing Units 280 is towards sensing area 210.Transparent panel (not shown) and line source 231 ' are relative with whole second side 213, and reflecting element 233 " relative with the whole second surface of transparent panel; so reflecting element 233 " also be relative with whole second side 213, wherein transparent panel, line source 231 ' and reflecting element 233 " between relative position and Fig. 3 identical, at this not in addition with graphic explanation.
In the present embodiment, except zone 217, the zone 219 between dotted line 218 and the second side 213 also can produce the blind area, so light source module 230 ' is arranged on whole second side 213, to avoid producing the blind area.Avoid regional 217 to become the mode of blind area identical with above-mentioned relevant for mode how to avoid zone 219 to become the blind area, will no longer describe in detail at this.
Figure 6 shows that the synoptic diagram of the optical touch-control module of another embodiment of the present invention.Please refer to Fig. 6, the optical touch-control module 200 of present embodiment " be in the kind of light source different from above-mentioned optical touch-control module 200 different.At optical touch-control module 200 " in, light source 250 ' is take pointolite as example, it can be arranged on the top of the first Photosensing Units 220, and directly provides light towards sensing area 210.In addition, the optical touch-control module 200 of present embodiment " can further comprise at least one reflecting strips 240; be located at the edge of sensing area 210; and present embodiment is as example take two reflecting strips 240; and preferably, these two reflecting strips 240 are separately positioned on first side 211 and the 3rd side 214 of sensing area 210.Namely, the optical touch-control module 200 of present embodiment " be to replace two line sources 250 among Fig. 2 with reflecting strips 240.The optical touch-control module 200 of present embodiment " advantage similar to above-mentioned optical touch-control module 200, no longer repeat at this.In addition, the line source 250 among Fig. 5 also can be replaced by reflecting strips 240, and on the first Photosensing Units 220 and the second Photosensing Units 280 light source 250 ' is set respectively.
In sum, in optical touch-control module of the present invention, owing to be provided with light source module, so line source that can be by controlling light source module is whether luminous, make Photosensing Units sense the optical information that optical information that shade produces and the shade virtual image produce, and then avoid the generation of blind area.Therefore, optical touch-control module of the present invention has better sensing precision.
The above, only be embodiments of the invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (20)
1. an optical touch-control module is arranged on the reference planes, and has sensing area, and it is characterized in that: this optical touch-control module comprises the first Photosensing Units and light source module; This sensing area comprises first side and second side, and this second side is relative with this first side; This first side comprises first end, and this first Photosensing Units is located at this first end, and the first sensing face of this first Photosensing Units is towards this sensing area; This light source module comprises line source, transparent panel and reflecting element, and this line source is located at by the second side of this sensing area, and this line source is suitable for providing light to this sensing area; This transparent panel is located between this line source and this second side, and angle is acute angle between this transparent panel and this reference planes; This transparent panel has relative first surface and second surface, and this line source is positioned at by this first surface, and this transparent panel is suitable for reflecting part light and part light is passed through; This reflecting element is arranged on by this second surface, and the light reflection that this reflecting element will reflect from this transparent panel returns this transparent panel.
2. optical touch-control module as claimed in claim 1, it is characterized in that: this first surface of this transparent panel and this line source are relative with whole this second side, and this reflecting element is relative with this second surface of this transparent panel.
3. optical touch-control module as claimed in claim 2, it is characterized in that: this first side further comprises the second end, this optical touch-control module further comprises the second Photosensing Units, this second Photosensing Units is located at the second end of this first side, this second Photosensing Units comprises the second sensing face, and this second sensing face is towards this sensing area.
4. optical touch-control module as claimed in claim 1, it is characterized in that: first paragraph and second segment are divided in this second side, contiguous this first Photosensing Units of this first paragraph, this line source and this transparent panel are relative with whole this first paragraph, and this reflecting element is relative with whole this second surface.
5. optical touch-control module as claimed in claim 4, it is characterized in that: this optical touch-control module further comprises level crossing, and this level crossing is located at by this line source, and relative with this second segment, and the minute surface of this level crossing is vertical with these reference planes.
6. optical touch-control module as claimed in claim 1, it is characterized in that: this transparent panel is plastic sheet or glass sheet.
7. optical touch-control module as claimed in claim 1, it is characterized in that: this acute angle between this transparent panel and this reference planes is 45 degree, this line source has exiting surface, angle between this first surface and this exiting surface is 45 degree, and the angle between this reflecting element and this second surface is 45 degree.
8. optical touch-control module as claimed in claim 1, it is characterized in that: this reflecting element is level crossing.
9. optical touch-control module as claimed in claim 1, it is characterized in that: this reflecting element comprises transparent base and a plurality of reflective prism; This transparent base has the 3rd relative surface and the 4th surface, and the 3rd surface is to this transparent panel; These a plurality of reflective prisms are located at the 4th surface.
10. optical touch-control module as claimed in claim 9 is characterized in that: those reflective prisms comprise a plurality of triangular prisms of being arranged in parallel or a plurality of pyrometric cones of arrayed.
11. optical touch-control module as claimed in claim 1, it is characterized in that: this line source has exiting surface, this line source comprises pointolite and light-strip, this light-strip has incidence surface, this pointolite is arranged on by the incidence surface of this light-strip, and the exiting surface of this line source is a surface of this light-strip.
12. optical touch-control module as claimed in claim 1 is characterized in that: this line source comprises at least one reflecting strips, and this reflecting strips is located at the edge of this sensing area.
13. optical touch-control module as claimed in claim 1 is characterized in that: this line source comprises at least one pointolite, and this pointolite is located at the edge of this sensing area.
14. a light source module is arranged on the reference planes, it is characterized in that: this light source module comprises line source, transparent panel and reflecting element; Angle is acute angle between this transparent panel and this reference planes, and this transparent panel has relative first surface and second surface, and this line source is positioned at by this first surface, and this transparent panel is suitable for reflecting part light and part light is passed through; This reflecting element is arranged on by this second surface, and the light reflection that this reflecting element will reflect from this transparent panel returns this transparent panel.
15. light source module as claimed in claim 14 is characterized in that: this transparent panel is plastic sheet or glass sheet.
16. light source module as claimed in claim 14, it is characterized in that: this acute angle between this transparent panel and this reference planes is 45 degree, this line source has exiting surface, and the angle between this first surface and this exiting surface is 45 degree, and the angle between this reflecting element and this second surface is 45 degree.
17. light source module as claimed in claim 14 is characterized in that: this reflecting element is level crossing.
18. light source module as claimed in claim 14 is characterized in that: this reflecting element comprises transparent base and a plurality of reflective prism, and this transparent base has the 3rd relative surface and the 4th surface, and the 3rd surface is to this transparent panel; These a plurality of reflective prisms are located at the 4th surface.
19. light source module as claimed in claim 18 is characterized in that: those reflective prisms comprise a plurality of triangular prisms of being arranged in parallel or a plurality of pyrometric cones of arrayed.
20. light source module as claimed in claim 14, it is characterized in that: this line source has exiting surface, this line source comprises pointolite and light-strip, this light-strip has incidence surface, this pointolite is arranged on by the incidence surface of this light-strip, and the exiting surface of this line source is a surface of this light-strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110209946.5A CN102902417B (en) | 2011-07-26 | 2011-07-26 | Optical touch-control module and light source module thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110209946.5A CN102902417B (en) | 2011-07-26 | 2011-07-26 | Optical touch-control module and light source module thereof |
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| Publication Number | Publication Date |
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| CN102902417A true CN102902417A (en) | 2013-01-30 |
| CN102902417B CN102902417B (en) | 2015-08-26 |
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| CN201110209946.5A Expired - Fee Related CN102902417B (en) | 2011-07-26 | 2011-07-26 | Optical touch-control module and light source module thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TW200639487A (en) * | 2005-03-28 | 2006-11-16 | Sanyo Epson Imaging Devices Co | Liquid crystal device and electronic equipment |
| CN1908754A (en) * | 2005-08-05 | 2007-02-07 | 鸿富锦精密工业（深圳）有限公司 | Straight down type back light component and liquid crystal display device |
| TW200717294A (en) * | 2005-10-28 | 2007-05-01 | Zebex Ind Inc | Laser touch-controlled module equipped with a coordinate-detecting device |
| TW201112091A (en) * | 2009-09-17 | 2011-04-01 | Pixart Imaging Inc | Optical touch device and locating method thereof, and liner light source module |
-
2011
- 2011-07-26 CN CN201110209946.5A patent/CN102902417B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200639487A (en) * | 2005-03-28 | 2006-11-16 | Sanyo Epson Imaging Devices Co | Liquid crystal device and electronic equipment |
| CN1908754A (en) * | 2005-08-05 | 2007-02-07 | 鸿富锦精密工业（深圳）有限公司 | Straight down type back light component and liquid crystal display device |
| TW200717294A (en) * | 2005-10-28 | 2007-05-01 | Zebex Ind Inc | Laser touch-controlled module equipped with a coordinate-detecting device |
| TW201112091A (en) * | 2009-09-17 | 2011-04-01 | Pixart Imaging Inc | Optical touch device and locating method thereof, and liner light source module |
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