CN102902417B - Optical touch-control module and light source module thereof - Google Patents
Optical touch-control module and light source module thereof Download PDFInfo
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- CN102902417B CN102902417B CN201110209946.5A CN201110209946A CN102902417B CN 102902417 B CN102902417 B CN 102902417B CN 201110209946 A CN201110209946 A CN 201110209946A CN 102902417 B CN102902417 B CN 102902417B
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- transparent panel
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- line source
- optical touch
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Abstract
The present invention is about a kind of optical touch-control module and light source module thereof, and optical touch-control module is arranged in reference planes, and has sensing area.Optical touch-control module comprises the first Photosensing Units and light source module.Sensing area has relative first side and second side.First Photosensing Units is located at the first side of sensing area, and its first sensing face is towards sensing area.Light source module comprises line source, transparent panel and reflecting element.Line source is located at by the second side of sensing area, by the first surface being positioned at transparent panel, provides light to sensing area.Transparent panel is located between line source and second side, is acute angle with the angle of reference planes.Transparent panel reflecting part light also makes some light pass through.Reflecting element is arranged on by the second surface of transparent panel, and the light reflection of reflection self-induced transparency plate is returned transparent panel.Compare prior art, by the luminescence of the line source of manipulation light source module whether the present invention, makes Photosensing Units sense optical information, avoids the generation of blind area.
Description
Technical field
The invention relates to a kind of touch-control module, and relate to a kind of optical touch-control module and light source module thereof especially.
Background technology
In recent years, adopt the man-machine interface of touch-control input or writing technology because comparatively other man-machine interface is directly perceived, so deeply by consumers, become the electronic product that relevant manufactures actively imports application.Touch-control module common at present has electric resistance touch-control module, capacitive touch-control module and optical touch module etc., 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 guide-lighting group 110, light-emitting component 120 and optical sensor 130.Wherein, guide-lighting group 110 comprises two light-strip 112a, 112b and stripe mirror (mirror) 114.Light-strip 112a, 112b and stripe mirror 114 arrange 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 stripe mirror 114, and the region in above-mentioned rectangular path is sensing area 116.In addition, light-emitting component 120 is arranged between light-strip 112a and light-strip 112b adjacent both ends, and in order to provide light in light-strip 112a and light-strip 112b.Light-strip 112a, 112b convert linear light sorurce in order to the light provided by light source, to be irradiated whole sensing area 116 by linear light sorurce.In addition, optical sensor 130 is arranged on by light-strip 112a, and the visual field of optical sensor 130 (Field of View, FOV) contains whole sensing area 116.
Hold above-mentioned, optical sensor 130 for detecting in sensing area 116 whether have shade, and calculates the position of shade.In more detail, touch point (i.e. shade) A in sensing area 116 produces mirror point A1 via stripe mirror 114, and optical sensor 130 can detect dim spot A2, A3.Like this, distance d1, d2 can be calculated, and the parameter coordinating other known can calculate the position (coordinate) of touch point A.Other above-mentioned known parameter comprises sensing area 116 and equals mirror point A1 bee-line etc. to stripe mirror 114 at the width of Y-axis, touch point A to the bee-line of stripe mirror 114 in the length of X-axis, sensing area 116.Having about detailed Coordinate calculation method is usual knowledge in art, will not describe in detail at this.
But there is certain blind area (Blind Zone) 150 in existing optical touch-control module 100, the region of blind area 150 between dotted line 151 and stripe mirror 114.Blind area 150 be meant to the region that cannot accurately calculate touch point coordinate.For example, the touch point B in sensing area 116 is just positioned at blind area 150, and dim spot B2, B3 that now the touch point that detects of optical sensor 130 and mirror point B1 thereof produce can overlap, and so accurately cannot calculate the coordinate of touch point B.
Summary of the invention
The invention provides a kind of can the optical touch-control module of dead zone-eliminating.
The present invention provides a kind of light source module being 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 in 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 between this transparent panel and this reference planes, angle is acute angle; 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 some light is passed through; This reflecting element is arranged on by this second surface, and reflection is returned this transparent panel from the light reflection of this transparent panel by this reflecting element.
In an embodiment of the present invention, the first surface of above-mentioned transparent panel and line source 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 comprises the second Photosensing Units further, 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 first Photosensing Units of first paragraph, line source and transparent panel 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 comprises level crossing further, is located at by line source, and relative with second segment, and 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, the acute angle between above-mentioned transparent panel and reference planes is 45 degree, and line source has exiting surface, and the angle between first surface and exiting surface is 45 degree, and the angle between reflecting element and 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 multiple reflective prism.Transparent base has the 3rd relative surface and the 4th surface, and the 3rd surface is in the face of transparent panel.Multiple reflective prism is located at the 4th surface.
In an embodiment of the present invention, above-mentioned reflective prism comprises multiple triangular prism arranged in parallel or multiple 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 separately proposes a kind of light source module, and it is arranged on the reference plane, and light source module comprises line source, transparent panel and reflecting element.Press from both sides an acute angle between transparent panel and reference planes, and there is relative first surface and second surface.Line source is positioned at by first surface, and transparent panel is used for reflecting part light some light is passed through.Reflecting element is arranged on by second surface, and the light reflection of reflection self-induced transparency plate is returned transparent panel by reflecting element.
Beneficial effect of the present invention: in optical touch-control module of the present invention and light source module, by whether manipulating the luminescence of the line source of light source module, Photosensing Units is sensed optical information that shade produces and the optical information that the shade virtual image produces, 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 coordinate institute's accompanying drawings, be described in detail below.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing a kind of optical touch-control module.
Fig. 2 is the schematic diagram of the optical touch-control module of the embodiment of the present invention.
Fig. 3 is the diagrammatic cross-section of the light source module of Fig. 2.
Fig. 4 is the schematic diagram of the reflecting element of another embodiment of the present invention.
Fig. 5 is the schematic diagram of the optical touch-control module of another embodiment of the present invention.
Fig. 6 is the schematic diagram of the optical touch-control module of another embodiment of the present invention.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, the optical touch-control module propose foundation the present invention and the embodiment of light source module, structure, feature and effect, be described in detail as follows.
Fig. 2 is the schematic diagram of the optical touch-control module of one embodiment of the invention, and Fig. 3 is the diagrammatic cross-section of the light source module of A-A line along Fig. 2.Please refer to Fig. 2 and Fig. 3, the optical touch-control module 200 of the present embodiment is arranged in reference planes 50, and have sensing area 210.Sensing area 210 shape can be rectangle, but not as limit.Optical touch-control module 200 comprises the first Photosensing Units 220 and light source module 230.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 the second side 213 that light source module 230 is located at sensing area 210 is other, wherein second side 213 is relative with first side 211.
Hold above-mentioned, 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 for line source, but does not limit its kind herein, and the quantity of light source 250 is also determined by actual demand.Specifically, 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 in order to provide the light from exiting surface 252 outgoing, to irradiate whole sensing area 210.Each light source 250 can be the combination of light-strip and pointolite (as light emitting diode), and adjacent two light sources 250 also can share a pointolite.
In the present embodiment, light source module 230 comprises line source 231, transparent panel 232 and reflecting element 233.The second side 213 that line source 231 is located at sensing area 210 is other, and line source 231 is used to provide light to sensing area 210.Transparent panel 232 is located between line source 231 and second side 213, and the angle between transparent panel 232 and 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 first surface 232a.Transparent panel 232 is used for reflecting part light some light is passed through.Reflecting element 233 is arranged on by second surface 232b, and reflecting element 233 is used for the light reflection of reflection self-induced transparency plate 232 to return 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 the material being coated with 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.Specifically, the exiting surface 237b of line source 231 is towards sensing area 210, and pointolite 236 is the one end being arranged on second side 213.Pointolite 236 provides light in light-strip 237, and the light that light-strip 237 makes pointolite 236 provide is from exiting surface 237b outgoing.When pointolite 236 is opened, can by transparent panel 232 also directive sensing area 210 from the some light L1 of the exiting surface 237b outgoing of line source 231.When pointolite 236 is closed, the some light L2 that light source 250 provides is reflexed to reflecting element 233 by transparent panel 232, and the light reflection of reflection self-induced transparency plate 232 is returned transparent panel 232 by reflecting element 233, 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, when pointolite 236 is closed, reflecting element 233 can in order to provide mirror face function.
For eliminating the blind area described in background technology, first paragraph 213a and second segment 213b is divided in second side 213 by the present embodiment, contiguous first Photosensing Units 220 of first paragraph 213a, and the region 217 between first paragraph 213a and dotted line 216 is the blind area in background technology.Namely, first paragraph 213a is the region that correspondence may produce blind area.In addition, light source module 230 is arranged on by first paragraph 213a, wherein the first surface 232a of transparent panel 232 and line source 231 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 reference planes 50 is preferably 45 degree, and the angle α between first surface 232a and exiting surface 237b is preferably 45 degree, and the angle β between reflecting element 233 and second surface 232b is preferably 45 degree, 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, is located at line source 231 other, 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, by line source 231 luminescence whether, enough optical information can be obtained, to eliminate blind area of the prior art.Specifically, when shade O(as finger) manipulate in region 217 time, according to line source 231 luminescence whether, the optical information that the first Photosensing Units 220 can sense the shade O in sensing area 210 respectively and be formed via the shade virtual image O ' that reflecting element 233 is formed.Namely, when pointolite 236 is opened, line source 231 can be luminous, and the first Photosensing Units 220 can sense the optical information that shade O produces, i.e. the position of dim spot C1.On the other hand, when pointolite 236 is closed, line source 231 is not luminous, and the first Photosensing Units 220 senses the optical information that shade virtual image O ' that reflecting element 233 formed produces, i.e. the position of dim spot C2.Therefore, by opening and close pointolite 236, the position that the first Photosensing Units 220 can be made sequentially to sense the dim spot C1 formed by shade O and the position of dim spot C2 formed by shade virtual image O ', to obtain enough optical information.So, the position by dim spot C1 and C2 calculates the correct coordinates of shade O, so the optical touch-control module 200 of the present embodiment can eliminate 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 for level crossing, the present invention does not limit reflecting element 233 and is required to be level crossing.For example, as shown in Figure 4, reflecting element 233 ' can comprise transparent base 238 and multiple 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.Multiple reflective prism 239 is located at the 4th surperficial 238b, and these reflective prisms 239 are such as multiple triangular prisms arranged in parallel.In addition, in another embodiment, also these triangular prisms can be replaced with multiple pyrometric cones of arrayed.
It is noted that when optical touch-control module 200 only comprises first Photosensing Units 220, light source module 230 also can along whole second side 213, that is, level crossing 270 can replace by light source module 230.In another embodiment, when optical touch-control module comprises two Photosensing Units, light source module can be arranged along whole second side 213, below by for one embodiment illustrate.
Figure 5 shows that the schematic 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 the present embodiment further comprises the second Photosensing Units 280, and light source module 230 ' is arranged on whole second side 213, and the level crossing 270 in optical touch-control module 200 is then omitted.In addition, the four side 215 of sensing area 210 is such as provided with another light source 250(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 " be also relative with whole second side 213, wherein transparent panel, line source 231 ' and reflecting element 233 " between relative position identical with Fig. 3, at this not separately with graphic explanation.
In the present embodiment, except region 217, the region 219 between dotted line 218 and second side 213 also can produce blind area, and therefore light source module 230 ' is arranged on whole second side 213, to avoid producing blind area.Have about the mode how avoiding region 219 to become blind area identical with the above-mentioned mode avoiding region 217 to become blind area, will no longer describe in detail at this.
Figure 6 shows that the schematic 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 the present embodiment " different from the different kinds be in light source of above-mentioned optical touch-control module 200.At optical touch-control module 200 " in, light source 250 ' is for pointolite, and 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 the present embodiment " at least one reflecting strips 240 can be comprised further; be located at the edge of sensing area 210; and the present embodiment is for 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 the present embodiment " be two line sources 250 replaced by reflecting strips 240 in Fig. 2.The optical touch-control module 200 of the present embodiment " advantage similar to above-mentioned optical touch-control module 200, no longer repeat at this.In addition, the line source 250 in Fig. 5 also can be replaced by reflecting strips 240, and arranges light source 250 ' respectively on the first Photosensing Units 220 and the second Photosensing Units 280.
In sum, in optical touch-control module of the present invention, owing to being provided with light source module, so by the line source that manipulates light source module luminescence whether, Photosensing Units is sensed optical information that shade produces and the optical information that the shade virtual image produces, and then avoid the generation of blind area.Therefore, optical touch-control module of the present invention has and preferably senses precision.
The above, only embodiments of the invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to any simple modification that 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 in 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, 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 between this transparent panel and this reference planes, angle is acute angle; 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 some light is passed through; This reflecting element is arranged on by this second surface, reflection is returned this transparent panel from the light reflection of this transparent panel by this reflecting element, wherein first paragraph and second segment are divided in this second side, this first paragraph this first Photosensing Units contiguous, this first surface of this line source and this transparent panel is relative with this first paragraph whole, and this reflecting element is relative with this second surface whole of this transparent panel.
2. optical touch-control module as claimed in claim 1, it is characterized in that: this first side comprises the second end further, this optical touch-control module comprises the second Photosensing Units further, 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.
3. optical touch-control module as claimed in claim 1, it is characterized in that: this optical touch-control module comprises level crossing further, 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.
4. optical touch-control module as claimed in claim 1, is characterized in that: this transparent panel is plastic sheet or glass sheet.
5. 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, 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.
6. optical touch-control module as claimed in claim 1, is characterized in that: this reflecting element is level crossing.
7. optical touch-control module as claimed in claim 1, is characterized in that: this reflecting element comprises transparent base and multiple reflective prism; This transparent base has the 3rd relative surface and the 4th surface, and the 3rd surface is in the face of this transparent panel; The plurality of reflective prism is located at the 4th surface.
8. optical touch-control module as claimed in claim 7, is characterized in that: those reflective prisms comprise multiple triangular prism arranged in parallel or multiple pyrometric cones of arrayed.
9. 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.
10. optical touch-control module as claimed in claim 1, it is characterized in that: this line source comprises at least one reflecting strips, this reflecting strips is located at the edge of this sensing area.
11. optical touch-control modules as claimed in claim 1, it is characterized in that: this line source comprises at least one pointolite, this pointolite is located at the edge of this sensing area.
12. 1 kinds of light source modules, are arranged in reference planes, it is characterized in that: this light source module comprises line source, transparent panel and reflecting element; Between this transparent panel and this reference planes, angle is acute angle, 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 some light is passed through; This reflecting element is arranged on by this second surface, reflection is returned this transparent panel from the light reflection of this transparent panel by this reflecting element, this reflecting element comprises transparent base and multiple reflective prism, and this transparent base has the 3rd relative surface and the 4th surface, and the 3rd surface is in the face of this transparent panel; The plurality of reflective prism is located at the 4th surface.
13. light source modules as claimed in claim 12, is characterized in that: this transparent panel is plastic sheet or glass sheet.
14. light source modules as claimed in claim 12, 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.
15. light source modules as claimed in claim 12, is characterized in that: this reflecting element is level crossing.
16. light source modules as claimed in claim 12, is characterized in that: those reflective prisms comprise multiple triangular prism arranged in parallel or multiple pyrometric cones of arrayed.
17. 1 kinds of light source modules, are arranged in reference planes, it is characterized in that: this light source module comprises line source, transparent panel and reflecting element; Between this transparent panel and this reference planes, angle is acute angle, 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 some light is passed through; This line source has exiting surface, and this line source comprises pointolite and light-strip, and this light-strip has incidence surface, and 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; This reflecting element is arranged on by this second surface, and reflection is returned this transparent panel from the light reflection of this transparent panel by this reflecting element.
18. light source modules as claimed in claim 17, is characterized in that: this transparent panel is plastic sheet or glass sheet.
19. light source modules as claimed in claim 17, it is characterized in that: this acute angle between this transparent panel and this reference planes is 45 degree, 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.
20. light source modules as claimed in claim 17, is characterized in that: this reflecting element is level crossing.
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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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| CN201110209946.5A CN102902417B (en) | 2011-07-26 | 2011-07-26 | Optical touch-control module and light source module thereof |
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| CN102902417B true CN102902417B (en) | 2015-08-26 |
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| TW200639487A (en) * | 2005-03-28 | 2006-11-16 | Sanyo Epson Imaging Devices Co | Liquid crystal device and electronic equipment |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437276C (en) * | 2005-08-05 | 2008-11-26 | 鸿富锦精密工业（深圳）有限公司 | Straight down type back light component and liquid crystal display device |
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Patent Citations (3)
| 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 |
| 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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