CN1462143A - Linear light source for image reading device and liquid crystal module - Google Patents
Linear light source for image reading device and liquid crystal module Download PDFInfo
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- CN1462143A CN1462143A CN 02121960 CN02121960A CN1462143A CN 1462143 A CN1462143 A CN 1462143A CN 02121960 CN02121960 CN 02121960 CN 02121960 A CN02121960 A CN 02121960A CN 1462143 A CN1462143 A CN 1462143A
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Abstract
A linear light source for image reading device and liquid crystal module at least comprises a light guide bar and a light source component. The light guide rod is characterized in that the light guide rod is a polygonal cylinder, one surface in the polygonal cylinder is a reflecting surface which is distributed with surface textures and has a reflecting effect, the corresponding surface of the reflecting surface is a convex-shaped emergent surface, the other surfaces are reflecting layers, the tail ends of two sides of the polygonal cylinder are provided with incident surfaces which can be used for light to enter, and the light source assembly emits light beams at the two side ends (or one side end, and the other side end is the end surface of the reflecting layer) of the polygonal cylinder and uniformly emits the light beams through the convex-shaped emergent surface; the light guide rod of the invention has the advantages of simple structure and shape, simple manufacture, high yield, low manufacturing cost, small specific volume, high light energy utilization rate and capability of shortening or increasing, and also has the advantages of multifunction, high brightness and low cost for generating monochromatic light or color light with different required wavelengths, thereby having practicability.
Description
Technical field
The present invention relates to a kind of linear light source, the image read-out and the used linear light source of Liquid Crystal Module of particularly a kind of scanner, facsimile machine, multifunction peripheral affairs machine and copying machines etc.
Background technology
In image read-outs such as scanner, facsimile machine, multifunction peripheral affairs machine and copying machines, need to come target is thrown light on linear light source, in Liquid Crystal Module, need the liquid crystal background is thrown light on, used a kind of method is: utilize linear light source, binding energy is converted to the lamp guide of flat light source with linear light source again, promptly can be liquid crystal board and provides backlight.
The prior art of the linear light source of image read-out and Liquid Crystal Module has: as shown in Figure 1, adopt the linear light source 110 of cold-cathode tube; As shown in Figure 2, adopt the linear light source 120 of light-emitting diode (LED) array; As shown in Figure 3, adopt led array to add the linear light source 130 of cylinder lens; As shown in Figure 4, adopt the linear light source 140 of cylinder lamp guide; Shown in Fig. 5 A and Fig. 5 B, adopt the cylinder lamp guide to add the linear light source 150 of shell; Shown in Fig. 6 and Fig. 7 and Fig. 8 A and Fig. 8 B and Fig. 9 A and Fig. 9 B, adopt cylinder and inclined-plane to intersect the linear light source 160,170,180 and 190 of the lamp guide that constitutes.
Above-mentioned linear light source shown in Figure 1 110 is made up of cold-cathode tube 112 and change-over circuit 114, the principle of luminosity of cold-cathode tube 112 is the same with common fluorescent tube (thermionic-cathode tube), but the electrode part is not because of there being filament construction, the simple advantage that makes the electrode miniaturization again, be particularly suitable for the tubule footpath, right this technology is owing to need configuration transitions circuit 114, so overall volume is big, and because cold-cathode tube 112 is that cylinder is luminous, so the efficiency of light energy utilization is low, and can not produce the light of different wave length respectively, easily fragmentation and life-span are short.
Among Fig. 2, many LED124 are installed on substrate 122, for example 40.This technology can be as big as half space because of the radiation solid angle of LED 124, so the efficiency of light energy utilization is low; And owing to existing spacing and luminous intensity inconsistent between the LED 124, so optical uniformity is poor; And adopt many LED 124, so cost height.
Among Fig. 3, many LED 124 also are installed on substrate 122,, are provided with cylindrical lens 132 simultaneously as 40; Compare with Fig. 2, though this technology of setting up cylindrical lens 132 has been improved the efficiency of light energy utilization and optical uniformity, it is not enough that its efficiency of light energy utilization, uniformity are still disliked, and it has the shortcoming that raises the cost.
Technology as shown in Figure 4 sees also U.S. Patent number: 5400224, and lamp guide 142 backs that light utilizes a cylinder to constitute are penetrated.Lamp guide 142 cross sections are circular, also can be rectangle, triangle, ellipse, irregularly shaped etc., after incident light 200 is injected, in lamp guide 142, to propagate in the total reflection mode of unglazed throughput loss greater than the light of critical angle for incidence angle, finally penetrate, form emergent light 202 from the other end; After light drops down onto superficial makings 144, to from then on for incidence angle less than the light of critical angle, superficial makings 144 reflects away, the light 204 that formation reflects from superficial makings 144, simultaneously, superficial makings 144 relative smooth surfaces also have incidence angle to go out less than the light refraction of critical angle therewith, form the light 206 that reflects from smooth surface.And since light from three ejaculations, so the efficiency of light energy utilization is low, because of lamp guide 142 only be simple cylinder, superficial makings 144 only is simple band shape, so optical uniformity is poor.
Technology shown in Fig. 5 A, 5B sees also Japanese Unexamined Patent Publication No: the spy opens flat 8-163320.Linear light source 150 is by lamp guide 152, light source assembly 300 and shell 158 are formed, the cross section of the lamp guide 152 that is made of cylinder is that rectangle removes the pentagon that forms behind the angle, or remove the polygonal that forms behind two angles or the plural angle for rectangle, formed plane is exit facet 154 after removing an angle, lamp guide 152 with exit facet 154 adjacent two sides beyond other side on scribble reflector 156 (consulting Fig. 5 B), at exit facet 154 and be provided with at least one face beyond the end face of light source assembly 300, be provided with shell 158 across thin air layer.
This technology need be provided with shell 158, volume and cost have been increased, because of the cross section of lamp guide 152 is that rectangle removes the formed polygonal in a plurality of angles, more easily produce the light of incidence angle less than critical angle, and the light to coming out from lamp guide 152 surface refraction, only can part after shell 158 inwalls reflections again refraction enter in the lamp guide 152, so the efficiency of light energy utilization is not high enough, and only depend on reflector 156 to regulate output light flux and distribute, so optical uniformity is good inadequately.
As Fig. 6, technology shown in Figure 7, see also Taiwan patent announcement number: 326931, among Fig. 6, linear light source 160 is made up of lamp guide 162 and light source assembly 300; Intersect the lamp guide 162 that constitutes by cylinder and inclined-plane, its cylinder cross section is a rectangle, and the inclined-plane is a tapered plane 164, and relative with tapered plane 164 be exit facet 168, on tapered plane 164, is provided with superficial makings 165 and reflector 166;
As shown in Figure 7, linear light source 170 is made up of lamp guide 172 and two ends light source assembly 300; Intersect the lamp guide 172 that constitutes by cylinder and inclined-plane among Fig. 7, the cylinder cross section is a rectangle, and the inclined-plane is a two ends tapered plane 174, and relative with tapered plane 174 is exit facet 178, and all the other settings are identical with Fig. 6; Above-mentioned technology more easily produces incidence angle and causes the luminous flux loss less than the light of critical angle, so the efficiency of light energy utilization is not high because the cross section of lamp guide 162,172 is a rectangle; Only depend on the tapered plane 164,174 and the reflector 166 that are linear change to regulate the output light flux distribution, so optical uniformity is bad.
Shown in Fig. 8 A, Fig. 8 B, linear light source 180 is made up of lamp guide 182 and the light source assembly 300 that is positioned at two ends.Intersect the lamp guide 182 that constitutes by cylinder and inclined-plane, the cylinder cross section is irregularly shaped (seeing also Fig. 8 B), the inclined-plane is made up of the opposite tapered plane 184 of two pairs of incline directions that is positioned at lamp guide 182 both sides, exit facet 186 is other cylinder on the non-face of cylinder, relative to exit facet 186 scribbling the superficial makings 188 in reflector, this technology is because of the irregular cross sectional shape of this kind of lamp guide 182, more easily produce incidence angle and cause the luminous flux loss less than the light of critical angle, so the efficiency of light energy utilization is not very high; The reflector is simple banded again, only depends on the tapered plane 184 that is linear change to regulate output light flux and distributes, so optical uniformity is not fine.
Shown in Fig. 9 A, Fig. 9 B, linear light source 190 is made up of lamp guide 192 and light source assembly 300.Intersect the lamp guide 192 that constitutes by cylinder and inclined-plane, cylinder sanction face is irregularly shaped, and the inclined-plane is a skew surface 194, and exit facet 196 be irregular cylinder, and relative with exit facet 196 is the superficial makings 198 that scribbles the reflector; In addition, still be provided with the groove 199 that constitutes by two inclined-planes.This technology more easily produces incidence angle and causes the luminous flux loss less than the light of critical angle owing to this kind irregular section shape of lamp guide 192, so the efficiency of light energy utilization is not really desirable; The reflector is simple banded again, only depends on skew surface 194, and groove 199 is regulated output light flux and distributed, so optical uniformity is not really desirable.
The technology of linear light source 400 as shown in figure 10 sees also Taiwan patent announcement case numbers 420306; Wherein the superficial makings 432 of the reflecting surface 430 of this lamp guide 410 is perpendicular to this transmission face optical axis, it is not equidistant helical teeth shape, and this reflector 434 is irregularly shaped, this helical teeth shape is tilted to the direction that deviates from this light source assembly 450, propagates to the direction that deviates from this light source assembly 450 to help reverberation; Superior optical uniformity volume is little, but the efficiency of light energy utilization is high and the advantage of brachymemma or growth though reach, yet the accuracy specification requirement of lamp guide 410 moulds is quite strict and to reach superficial makings 432 for not equidistant helical teeth shape and need scribble the random scatters layer and cause die manufacturing cost height and yields to be difficult for improving to cause production cost high, not satisfactory.
For overcoming above-mentioned shortcoming, this creator develops the present invention finally through the further investigation test.
Summary of the invention
The present invention will provide a kind of image read-out and the used linear light source of Liquid Crystal Module, make with solution that its tool is luminous evenly, light utilization efficiency is high, volume is little, and can produce multi-functional, the high brightness of the monochromatic light of required different wave length or colourama and the technical problem of low-cost effect.
It is such solving the problems of the technologies described above the technical scheme that is adopted:
The linear light source that a kind of image read-out and Liquid Crystal Module are used, it mainly is to include light source assembly and lamp guide at least, it is characterized in that:
This light source assembly, it is mainly constructed is to include a nonocclusive type polygon body locating surface, at least one reflecting surface and at least one installed surface, and is installed on and is at least a light-emitting diode (LED) on this installed surface;
This lamp guide, it is to comprise a type polygon cylinder, at least one exit facet, reflecting surface and a plurality of reflector, the plane of incidence of at least one tail side of this lamp guide body for supplying light to enter, relative two surfaces of in this lamp guide body certain are respectively equipped with a reflecting surface and a corresponding exit facet thereof that contains superficial makings, and remaining surface then is made up of the reflection aspect of reflex; The light that its plane of incidence enters repeatedly reflects to form light equably from this exit facet outgoing via the transmission of polygon cylinder and reflecting surface;
The type polygon body of this light source assembly is to be a type octagon body;
The type polygon cylinder of this lamp guide is to be a type octagonal cylinder;
The center line of one nonocclusive type polygon body of this locating surface is perpendicular to this installed surface, and it is the optical axis for this light source assembly;
This constitutes a nonocclusive type polygon body and another Plane intersects that constitutes locating surface of locating surface;
This constitutes this installed surface of a plane parallel of type polygon body locating surface;
One nonocclusive type polygon body of this formation locating surface and this contact-type image sensing device lamp guide incident side closely cooperate;
One plane of this formation locating surface contacts with the end face of this contact-type image sensing device lamp guide incident side;
This constitutes center line and this light source assembly optical axis coincidence of the type polygon body of light source assembly reflecting surface;
The top of this light source assembly reflecting surface and locating surface plane cutting go out to be at least the integration light beam exit portal of one circle;
This light source assembly installed surface intersects with the bottom of the reflecting surface that constitutes this parabolic and forms a rectangular indentation so that light-emitting diode to be installed;
Nearest and equally distributed mode is mounted on the installed surface this more than one light-emitting diode with distance light;
Exit facet on this lamp guide body is to form one to be the type body;
This type body exit facet is to be a strip, and the width of this strip is to reach desirable luminous intensity according to application to adjust;
This lamp guide reflecting surface is to have superficial makings, and this superficial makings sectional is handled, its each section surface roughness difference;
The surface of this lamp guide polygon cylinder reflecting surface is to be provided with superficial makings, this superficial makings sectional is handled, its close to sources place is smoothly and slightly more coarse, away from the then progressive increase of its roughness of light source place, the segmentation adjustment of roughness and improves the light uniformity so that the light of exit facet evenly distributes;
The surface that this lamp guide polygon cylinder contains the reflecting surface of superficial makings is to make plated film with silvery white reflectorised paint;
This lamp guide polygon cylinder other end is one to be reflected back into breech face in this polygon cylinder in order to the light that will arrive at this face;
The surface of this breech face is to make plated film with silvery white reflectorised paint.
The present invention includes lamp guide and light source assembly, this lamp guide includes: a polygon body, the plane of incidence of at least one tail end of this body for supplying light to enter, relative two surfaces of in this body certain are respectively equipped with a reflecting surface and a corresponding exit facet thereof that contains superficial makings, remaining surface is then by being made up of the reflector of reflex, make after the repeatedly reflection of the light that enters by the plane of incidence, make light equably from this exit facet outgoing via the transmission of polygon body and reflecting surface.
A this polygon body wherein surface is that to be the type body be that the reflectorised paint that the exit facet of light can not add white is made plated film, the corresponding reflecting surface that contains superficial makings with it must add the white reflection lacquer and make plated film, the superficial makings sectional of this reflecting surface is handled, its close to sources place is smoothly and slightly more coarse, away from the then progressive increase of its roughness of light source place, the segmentation adjustment of roughness is so that the light of exit facet evenly distributes and the raising light uniformity.The surface of remaining polygon body then is the reflector with reflex, the reflectorised paint that can add white is made plated film, two breech faces of this polygon body can be all light entrance face, light beam is respectively injected body by the two ends light source assembly, then both ends of the surface do not add the white reflection lacquer, or one tail end for the plane of incidence that can enter for light then another breech face be the reflection end face, this reflection end face can be reflected back into the light that arrives at this face in this polygon body, this reflection end face must add white reflection and coat with lacquer and make plated film.
Light source assembly is to use the lamp guide incident light source that is connected with the lamp guide incident end of contact-type image sensing device (CIS) as contact-type image sensing device (CIS), it is to comprise that type polygon seat formula locating surface, reflecting surface and are the installed surface on plane, and be installed on and be at least a light-emitting diode (LED) on this installed surface, this type polygon seat formula locating surface is used for being connected with the lamp guide incident tail end of contact-type image sensing device (CIS) and closely cooperates, and this lamp guide and light source assembly installed surface quadrature.
The center line of this nonocclusive polygon lamp guide body is perpendicular to the installed surface of this light source assembly, and it is the optical axis for light source assembly; A nonocclusive convex character shape polygon body that constitutes locating surface closely cooperates with contact-type image sensing device (CIS) projection shape polygon lamp guide incident end, and another formula plane of formation locating surface then contacts with the breech face of contact-type image sensing device (CIS) lamp guide incident end.
Because locating surface is that a nonocclusive projection shape polygon body intersects at a plane, and nonocclusive projection shape polygon body that constitutes this locating surface and contact-type image sensing device (CIS) lamp guide incident end closely cooperate, another plane that constitutes locating surface then contacts with the end face of contact-type image sensing device (CIS) lamp guide incident end, so have with contact-type image sensing device (CIS) lamp guide incident end be connected the high characteristic of positional accuracy, thereby make the degree of contact-type image sensing device (CIS) lamp guide incident light source light leak reduce to minimum, therefore luminous intensity distribution consistency is superior, nearest and equally distributed mode is installed on this installed surface and at least more than one light-emitting diode (LED) is with the distance optical axis, concentrate on the characteristic of optical axis so have the luminous intensity distribution, thereby improved the efficiency of light energy utilization and the optical uniformity of contact-type image sensing device (CIS) lamp guide that is attached thereto.
Owing to only need contact-type image sensing device (CIS) lamp guide incident end is directly inserted, rely on a nonocclusive polygon body that constitutes locating surface to realize being connected with closely cooperating of contact-type image sensing device (CIS) lamp guide incident end, removed common hot melt riveting process from, so have the simple characteristic of the technology of connection, thereby solved and made that its tool is luminous evenly, light utilization efficiency is high, volume is little, and can produce multi-functional, the high brightness of the monochromatic light of required different wave length or colourama and the technical problem of low-cost effect.
The present invention is simple in structure, and its advantage is as follows:
1, provide a kind of image read-out and Liquid Crystal Module used linear light source, the structure and the shape of this lamp guide are simple and clear, therefore the accuracy specification requirement of mould is rationally and not harsh, make the mould manufacturing expense low, and its superficial makings and have its superficial makings of reflector of reflex only to be the processing of surface roughness, the reflectorised paint processing procedure is simple and easy must not be coated with even it is coated with or plates, and the plating reflectorised paint is so that the manufacturing yields of lamp guide easily reaches is desirable;
2, provide a kind of image read-out and Liquid Crystal Module used linear light source, but the lamp guide brachymemma of its use become shorter lamp guide;
3, provide a kind of image read-out and Liquid Crystal Module used linear light source, this linear light source be by point source of light or after changing resulting point source of light luminous, obtain the wire emergent light through lamp guide of the present invention;
4, provide a kind of image read-out and Liquid Crystal Module used linear light source, this linear light source can produce the monochromatic light of required different wave length respectively, and can piece together the linear light source that grows up to for longer;
5, provide a kind of image read-out and Liquid Crystal Module used linear light source, be specially adapted to the linear light source of required target illuminations of image read-out such as scanner, facsimile machine, multifunction peripheral affairs machine and copying machines and the required background illumination of Liquid Crystal Module.
Description of drawings
Fig. 1 is the linear light source floor map of known employing cold-cathode tube;
Fig. 2 is the linear light source floor map of known employing led array;
Fig. 3 is the linear light source schematic cross-section that known employing led array adds the cylinder lens;
Fig. 4 is the linear light source schematic perspective view of known employing cylinder lamp guide;
Fig. 5 A is the linear light source schematic perspective view that known employing cylinder lamp guide adds shell;
Fig. 5 B is the schematic cross-section of Fig. 5 A;
Fig. 6 is the lamp guide that constitutes is intersected in known employing by cylinder and inclined-plane a kind of linear light source schematic perspective view;
Fig. 7 is the lamp guide that constitutes is intersected in known employing by cylinder and inclined-plane an another kind of linear light source floor map;
Fig. 8 A is the lamp guide that constitutes is intersected in known employing by cylinder and inclined-plane another linear light source floor map;
Fig. 8 B is the schematic cross-section of Fig. 8 A;
Fig. 9 A is the lamp guide that constitutes is intersected in known employing by cylinder and inclined-plane another linear light source floor map;
Fig. 9 B is the schematic cross-section of Fig. 9 A;
Figure 10 is the schematic perspective view of another known linear light source;
Figure 11 is the lamp guide structural perspective of a preferred embodiment of the present invention;
Figure 12 A is the schematic cross-section one of lamp guide structure of the present invention;
Figure 12 B is the schematic cross-section two of lamp guide structure of the present invention;
Figure 13 is the path schematic diagram one of light of the present invention;
Figure 14 is the path schematic diagram two of light of the present invention;
Figure 15 is the lamp guide of another preferred embodiment of the present invention and the schematic perspective view of light source assembly;
Figure 16 is the schematic perspective view of a preferred embodiment light source assembly of the present invention;
Figure 17 A is a preferred embodiment light-emitting diode scheme of installation of the present invention;
Figure 17 B is the light-emitting diode scheme of installation of another preferred embodiment of the present invention;
Figure 17 C is the light-emitting diode scheme of installation of another preferred embodiment of the present invention;
Figure 17 D is the light-emitting diode scheme of installation of a preferred embodiment more of the present invention.
Embodiment
Seeing also Figure 11, is the schematic perspective view of a preferred embodiment of the present invention, and as shown in the figure, linear light source 10 of the present invention is made up of lamp guide 20 and light source assembly 30;
These lamp guide 20 structures mainly are to be an octagonal body, then be to be most preferred embodiment in the present invention with symmetrical octagonal cylinder, this symmetry octagonal cylinder 210 includes: at least one end is the plane of incidence 220 that can supply light to enter for, one reflecting surface 230, one exit facet 240 and reflector 250, this symmetry octagonal cylinder 210 end in addition then can be a breech face 260, wherein this plane of incidence 220 is positioned at an end of this symmetry octagonal cylinder 210, entering of light can be provided, one side of this symmetry octagonal cylinder 210 is provided with a strip convex body 270, the upper end of this strip convex body 270 is an exit facet 240,240 of this reflecting surface 230 and this exit facets are provided with in symmetrical octagonal cylinder 210 relative two sides respectively, all the other then are reflector 250, this reflector 250 is made up of a plurality of rectangle plane, the optical axis in this reflector 250 is vertical this reflecting surface 230 and exit facet 240, and reflector 250 can be connected with exit facet 240 with reflecting surface 230 respectively and the other end is a breech face 260; In addition, the material of this symmetrical octagonal cylinder 210 is to be high-penetration, the low optics that absorbs material such as acryl etc., lamp guide body structure surface roughness is the smaller the better, medium refraction index is the smaller the better, then easily make the light of incident be easy to produce incidence angle greater than critical angle, to reach total reflection, reduce the loss of luminous flux.
The inner surface of this reflecting surface 230, can do a surface treatment in addition, its surface texture mode then can be divided into two kinds, please consult simultaneously shown in Figure 12 A and Figure 12 B, it is schematic cross-section for lamp guide structure of the present invention, one is higher away from its surface roughness of light source place, and close to sources place surface roughness is low; Another way makes each section have different surface roughnesses for making segment processing, with the coefficient that increases and decreases its reflection, refraction and absorb, and the surface roughness height, its surperficial diffusive power is big, reflection angle is big; Otherwise surface roughness is low, and diffusive power is little, reflection angle is little and can change its luminous flux simultaneously; In like manner, can reduce or increase the area of its superficial makings, regulate the luminous flux size to reach, to improve the light uniformity by the length that changes this symmetrical octagonal cylinder 210; This exit facet 240 is to be provided with respect to this reflecting surface 230, this reflector 250 is made up of a plurality of rectangle plane, can be connected with exit facet 240 with reflecting surface 230 respectively, and should transmission face optical axis be each cross section of X-axis, be vertical this reflecting surface 230 and exit facet 240; See also Figure 13 and shown in Figure 14, be to be opticpath figure, the light that is entered by this plane of incidence 220 is the repeatedly reflection via these a plurality of reflector 250, improve the light uniformity with this, make light be concentrated to this reflecting surface 230, from exit facet 240 outgoing, do have surface treatment that the light uniformity is greatly improved because of the reflector 250 of this reflecting surface 230 via these reflecting surface 230 reflections again again; The other end of this symmetry octagonal cylinder 210 is a breech face 260, it is the reflectorised paint that is coated with white or silver color in the plated film mode, light can be reflexed to again in this symmetry octagonal cylinder 210, with the further raising efficiency of light energy utilization, and the plane of incidence 220, reflecting surface 230, a plurality of transmission face, breech face 260 that should symmetry octagonal cylinder 210 must be made plated film with the lacquer of white or silver color, so that improve the utilance and the reflectivity of light, reduce light by the possibility that material absorbs, reduce its absorptivity.
See also Figure 15, be the lamp guide of another preferred embodiment of the present invention and the stereogram of light source assembly, as shown in the figure, the other end that wherein should symmetry octagonal cylinder 210, a plane of incidence 280 that provides light to enter is provided, makes symmetrical octagonal cylinder 210 locate the into purpose of light by its two ends to reach.
See also Figure 16, it is the stereogram of a preferred embodiment light source assembly of the present invention, as shown in the figure, it mainly is to be installed surface 310, locating surface 320 and reflecting surface 330, the outward appearance of this installed surface 310 is the octagonal cylinder 210 that equal lamp guide, and wherein the installation site of LED is to be at least one installation site.
Seeing also Figure 17 A, is the light-emitting diode scheme of installation of a preferred embodiment of the present invention, and as shown in the figure, a light-emitting diode (LED) 40 is installed on the circle centre position of circular mounting face 350;
See also Figure 17 B, it is the light-emitting diode scheme of installation of another preferred embodiment of the present invention, as shown in the figure, the center of two light-emitting diodes (LED) 40 and the center of circle of circular mounting face 350 are in a straight line, and the centre-to-centre spacing of two light-emitting diodes (LED) 40 is as far as possible little;
See also Figure 17 C, it is the light-emitting diode scheme of installation of another preferred embodiment of the present invention, as shown in the figure, the center of three light-emitting diodes (LED) 40 is dropped on the as far as possible little circle of diameter, the center of circle of this circle overlaps with the center of circle of circular mounting face 350, and three lines at the center of the center of circle of circular mounting face 350 and three light-emitting diodes (LED) 40 are adjacent with 120 °;
See also Figure 17 D, it is the light-emitting diode scheme of installation of a preferred embodiment more of the present invention, as shown in the figure, the center of four light-emitting diodes (LED) 40 is dropped on the as far as possible little circle of diameter, the center of circle of this circle overlaps with the center of circle of circular mounting face 350, and the line at the center of four light-emitting diodes (LED) 40 forms a square;
Among Figure 17 A to Figure 17 D, nearest and equally distributed mode is installed on the circular mounting face 350 because light-emitting diode (LED) 40 is with the distance optical axis, so can further make the luminous intensity distribution of light source assembly concentrate on optical axis.
The above only is preferred embodiment of the present invention, when can not with qualification claim of the present invention, the equalization of being done according to the present patent application claim changes and modifies generally, all should still belong in the scope that patent of the present invention contains.
In sum, the true tool advance of the present invention, practicality have met the application for a patent for invention important document, so propose application for a patent for invention in accordance with the law.
Claims (19)
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| CN 02121960 CN1462143A (en) | 2002-05-28 | 2002-05-28 | Linear light source for image reading device and liquid crystal module |
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| CN 02121960 CN1462143A (en) | 2002-05-28 | 2002-05-28 | Linear light source for image reading device and liquid crystal module |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100379243C (en) * | 2004-03-10 | 2008-04-02 | 景传光电股份有限公司 | Linear light source of amplifying light focal length range |
| WO2009103194A1 (en) * | 2008-02-20 | 2009-08-27 | 深圳帝光电子有限公司 | An led three dimensional lamp |
| CN101922633A (en) * | 2010-07-22 | 2010-12-22 | 鸿富锦精密工业（深圳）有限公司 | LED illumination device |
| CN101922634A (en) * | 2010-07-22 | 2010-12-22 | 鸿富锦精密工业（深圳）有限公司 | LED (Light Emitting Diode) illumination device |
| CN101958994A (en) * | 2009-07-17 | 2011-01-26 | 富士施乐株式会社 | Image reading device and image forming device |
| CN102865512A (en) * | 2012-09-17 | 2013-01-09 | 威海华菱光电股份有限公司 | Transmission light source for contact image sensor |
-
2002
- 2002-05-28 CN CN 02121960 patent/CN1462143A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100379243C (en) * | 2004-03-10 | 2008-04-02 | 景传光电股份有限公司 | Linear light source of amplifying light focal length range |
| WO2009103194A1 (en) * | 2008-02-20 | 2009-08-27 | 深圳帝光电子有限公司 | An led three dimensional lamp |
| CN101958994A (en) * | 2009-07-17 | 2011-01-26 | 富士施乐株式会社 | Image reading device and image forming device |
| CN101958994B (en) * | 2009-07-17 | 2015-08-05 | 富士施乐株式会社 | Image read-out and image processing system |
| CN101922633A (en) * | 2010-07-22 | 2010-12-22 | 鸿富锦精密工业（深圳）有限公司 | LED illumination device |
| CN101922634A (en) * | 2010-07-22 | 2010-12-22 | 鸿富锦精密工业（深圳）有限公司 | LED (Light Emitting Diode) illumination device |
| CN102865512A (en) * | 2012-09-17 | 2013-01-09 | 威海华菱光电股份有限公司 | Transmission light source for contact image sensor |
| CN102865512B (en) * | 2012-09-17 | 2015-12-02 | 威海华菱光电股份有限公司 | Transmission light source for contact image sensor |
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