CN101390376A - Linear light source device, and image reading device and planar display device using the linear light source device - Google Patents
Linear light source device, and image reading device and planar display device using the linear light source device Download PDFInfo
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- CN101390376A CN101390376A CNA2007800063992A CN200780006399A CN101390376A CN 101390376 A CN101390376 A CN 101390376A CN A2007800063992 A CNA2007800063992 A CN A2007800063992A CN 200780006399 A CN200780006399 A CN 200780006399A CN 101390376 A CN101390376 A CN 101390376A
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Abstract
A linear light source device is provided with a light guiding member (120). The light guiding member is provided with a prescribed length main body section (130) formed of a transparent body in a column shape having substantially uniform cross sections; and a first end section (121) and a second end section formed on the both ends of the main body section (130). The linear light source device is also provided with an LED element (200) arranged to face the first end section (121) and the second end section. The main body section (130) has a smooth mirror-like outer circumference surface. In prescribed areas in the circumference direction, a plurality of recessed sections (131) or protruding sections in the longitudinal direction are formed. Thus, light from the LED element (200) inputted to the main body section (130) from the first end section (121) and the second end section tends to be outputted from the regions facing the areas whereupon the recessed sections (131) or the protruding sections are formed on the circumference surface of the main body section (130), in the entire length in the longitudinal direction of the main body section (130).
Description
Technical field
The present invention relates to linear light source device, use its image read-out and flat display apparatus.This linear light source device is suitable for use as the lighting device of using backlight of flat display apparatus such as the lighting source of image read-outs such as image analyzer or liquid crystal indicator.
Background technology
A kind of image analyzer of so-called flatbed for example, is disclosed in patent documentation 1.Used the image sensor cell that is equipped with ccd line sensor (below, be called for short its " ccd image sensor unit ") U in this image analyzer.This ccd image sensor unit U constitutes by assembling lighting source 1, a plurality of speculum 21～25, lens 3, ccd line sensor 4 in shell 5 generally speaking as shown in Figure 11 of this application.In addition, in flatbed image analyzer S, ccd image sensor unit U is to be provided with along the mobile mode of sub scanning direction (left and right directions among Figure 11) below the original copy mounting table DP that is made of clear glass etc.Reading in the action of original copy, the reverberation of the original copy D of the optical illumination that sends from illuminated light source 1 is by after a plurality of speculums 21～25 reflections, scioptics 3 by optically focused on ccd line sensor 4.At this moment, the image of the line that extends at main scanning direction (among Figure 11 vertical direction) on original copy D imaging and being read on ccd line sensor 4 with paper.Whenever repeat this action at this ccd image sensor unit U when sub scanning direction moves prescribed distance, thus, the two dimensional image of original copy is read.
State in the use under the situation of this ccd image sensor unit U formation flatbed image analyzer S, original copy D is longer to the light path of ccd line sensor 4, can set the depth of field of lens 3 darker.Therefore, though it have original copy D from document board DP slightly projection also can read the advantages such as image that suppress the fuzzy distinctness of out of focus.
The lighting source 1 general cold-cathode tube that sends white light that adopts among the above-mentioned ccd image sensor unit U.Its reason is, in order to read coloured image, as the linear light source device that the total length that reads width that spreads all over main scanning direction is used with the brightness illumination original copy of equalization, considers cost under the present situation, and this cold-cathode tube is optimal selection.
But, when using cold-cathode tube, also have following problem as the linear light source device among the ccd image sensor unit U.
The first, the discharge voltage that the driving of cold-cathode tube need use inverter etc. to boost, therefore, the power circuit cost increases.
The second, because cold-cathode tube is enclosed harmful mercury vapor in inside, therefore be unfavorable for environment.
The 3rd, cold-cathode tube is at the uniformly light-emitting everywhere of length direction, and still, the photo detector in the ccd line sensor 4 is low more near the end light income more.Its reason is, under the situation of using ccd image sensor unit U, for example, reading on the ccd line sensor 4 that width finally is focused on several 10mm of A4 width, therefore, the angle of visual field of watching from ccd line sensor 4 or lens 3 for example becomes (with reference to Figure 12) about 50 °, and is the closer to the two ends of reading width, low more from the reflection light quantity of original copy.The decline of this light income can be carried out revisal, still, is particularly reading under the situation of coloured image, needs complicated correcting circuit.
The 4th, the utilization ratio of the light that cold-cathode tube sends is poor.Its reason is, though the direction that should throw light on is a direction, cold-cathode tube is from full Zhou Faguang, and therefore numerous light is wasted.In addition, in order to address this problem, must adopt the method at the behind of cold-cathode tube configuration reflection part etc., cost increases.
Patent documentation 1: TOHKEMY 2000-134413 communique
Summary of the invention
The present invention In view of the foregoing proposes, its major subjects is, lighting source as the image read-out that is equipped with ccd line sensor such as ccd image sensor unit etc. provides a kind of novel linear light source device that can solve the problems referred to above when using cold-cathode tube.Problem of the present invention also is, a kind of image read-out that uses this linear light source device as lighting source is provided, and, a kind of flat display apparatus that uses this linear light source device as lighting source is provided, this lighting source is so-called backlight.
In order to solve above-mentioned problem, adopt following technological means in the present invention.
Promptly, the linear light source device of a first aspect of the present invention is characterised in that, comprise: light guide member, it has by the transparent body and forms the much the same column in cross section and have the body of specific length and first end and the second end that forms at the two ends of this body; And the LED element of relative with above-mentioned first end respectively configuration with above-mentioned the second end, the outer peripheral face of above-mentioned body forms smooth mirror-like, and spread all over length direction, in the scope of its circumferential regulation, be formed with a plurality of recesses or protuberance, thus, has following tendency: the light that is incident to above-mentioned body from above-mentioned first end and above-mentioned the second end from above-mentioned LED element, the length direction that spreads all over above-mentioned body penetrates from the zone that the scope with being formed with above-mentioned recess or protuberance of the side face of above-mentioned body is relative.
Variation as the linear light source device of above-mentioned first aspect, be characterised in that, comprise: light guide member, it has by the transparent body and forms the much the same column in cross section and have the body of specific length and first end and the second end that forms at the two ends of this body; The LED element of relative configuration with above-mentioned first end; And the reflecting part that on above-mentioned the second end, forms, the outer peripheral face of above-mentioned body forms smooth mirror-like, and spread all over length direction, in the scope of its circumferential regulation, be formed with a plurality of recesses or protuberance, thus, has following tendency: be incident to the light from above-mentioned LED element of above-mentioned body from above-mentioned first end, spread all over the length direction of above-mentioned body, penetrate from the relative zone of the scope with being formed with above-mentioned recess or protuberance of the side face of above-mentioned body.
In addition, concrete mode as the reflecting part that forms at above-mentioned the second end, can adopt and the axis of the reflecting surface of the orthogonal axe of body, relative body two reflectings surface of 45 degree roughly or axis with the relative body roughly cone shape of the buses of 45 degree that tilts that tilts, perhaps have the pyramid shape of crest line.In addition, this reflecting part is covered by the resin of white color system, perhaps forms by evaporation metal.
And the transparent body as the body that is suitable for forming above-mentioned light guide member preferably adopts transparent resin or clear glass.
In addition, the concrete mode as the body of the much the same column in cross section except cylindric, can also adopt polygonal column, elliptical cylinder shape etc.
In a preferred embodiment, above-mentioned a plurality of recess or protuberance form by the groove that a plurality of directions of intersecting along the long axis with above-mentioned body are set every predetermined distance extend.In the case, the cross section of above-mentioned groove can be concave arc shape roughly.
Above-mentioned a plurality of recess or protuberance also can form by the depression that a plurality of concave spherical surface shapes are set.
In a preferred embodiment, above-mentioned LED element uses led chip, and this led chip is directly carried on the substrate that aluminium nitride is made.
In a preferred embodiment, aforesaid substrate comprises LED element mounting portion of carrying above-mentioned LED element and the radiating part that is connected with this LED element mounting portion.
In a preferred embodiment, on aforesaid substrate, be formed with common electrode pattern and a plurality of indivedual power consumption utmost point pattern, in above-mentioned LED element mounting portion, a plurality of led chips engage with above-mentioned common electrode pattern thick and fast, and connect by wire-bonded respectively between each led chip and above-mentioned indivedual power consumption utmost point patterns corresponding with them.
In a preferred embodiment, aforesaid substrate is long chi shape, on an end regions of its length direction, be formed with above-mentioned LED element mounting portion, and on its other zone, above-mentioned common electrode pattern and above-mentioned a plurality of indivedual power consumption utmost point patterns are to keep the relation that is parallel to each other and to form along the mode that the length direction of aforesaid substrate extends.
In a preferred embodiment, above-mentioned a plurality of led chip is made of at least one emitting red light led chip, at least one green emitting led chip and at least one blue-light-emitting led chip.
In a preferred embodiment, corresponding with the above-mentioned LED element mounting portion at least position of above-mentioned common electrode pattern and above-mentioned a plurality of indivedual power consumption utmost point patterns is fired silver paste by printing and is formed.
In a preferred embodiment, in the above-mentioned LED element mounting portion of aforesaid substrate, the reflection part of the frame shape that forms in the mode around above-mentioned a plurality of led chips is installed also.
In a preferred embodiment, above-mentioned reflection part is making interior face tilt towards the big more mode of upper opening diameter more, and this inner face is used as reflecting surface.This reflection part for example can be formed its integral body by the resin of white color system, and with its inner face as reflecting surface, perhaps, also can form the evaporation layer of aluminium at the inner face of the reflection part that forms by resin and implement mirror process etc.
In a preferred embodiment, in the end relative with above-mentioned led chip of above-mentioned light guide member, the reflection part that is formed with above-mentioned relatively frame shape is with the chimeric socket of the mode that it is included (socket) portion.
In a preferred embodiment, the outer surface of above-mentioned socket portion is covered by non-photic zone.
In a preferred embodiment, on the outer peripheral face of above-mentioned body, will spread all over 3～45 ° the central angle scope that circumferential prescribed limit that length direction forms a plurality of recesses or protuberance is set to above-mentioned body, more preferably 5～30 ° central angle scope.
In other preferred implementation, on the outer peripheral face of above-mentioned body, circumferential prescribed limit that length direction forms a plurality of recesses or protuberance be will spread all over and 120～270 ° central angle scope of above-mentioned body, more preferably 120～200 ° central angle scope will be set to.
The image read-out of a second aspect of the present invention, it comprises light supply apparatus in the enclosure, a plurality of speculums, lens and ccd line sensor, will be from by the reverberation of the original copy of the optical illumination that sends from above-mentioned light supply apparatus, guide on the above-mentioned ccd line sensor by above-mentioned a plurality of speculums and said lens, read the image of the wire of the main scanning direction in the above-mentioned original copy by above-mentioned ccd line sensor, it is characterized in that, as above-mentioned light supply apparatus, the linear light source device of a first aspect of the present invention preferably, the circumferential prescribed limit that will form a plurality of recesses that spread all over the length direction setting or protuberance on the outer peripheral face of above-mentioned body is set to 3～45 ° central angle scope of above-mentioned body.
In a preferred embodiment, the above-mentioned a plurality of recesses or the protuberance that are arranged on the above-mentioned body of above-mentioned light guide member form as follows: get over towards the both ends of the length direction of above-mentioned body, compare with the central portion of length direction, the outgoing light quantity is many more.
The flat display apparatus of a third aspect of the present invention, it comprises two-d display panel, the lighting device that this two-d display panel is thrown light on from behind, it is characterized in that, above-mentioned lighting device constitutes by the linear light source device that a plurality of a first aspect of the present invention are set simultaneously, preferably, the circumferential prescribed limit that will form a plurality of recesses that spread all over the length direction setting or protuberance on the outer peripheral face of above-mentioned body is set to 120～270 ° central angle scope of above-mentioned body.
In a preferred embodiment, between above-mentioned two-d display panel and above-mentioned lighting device, dispose light diffusing sheet or light diffusion panel.
In a preferred embodiment, the side opposite with above-mentioned two-d display panel at above-mentioned lighting device disposes light reflection surface.
Description of drawings
Fig. 1 is the integrally-built partial cross section front view of first execution mode of expression linear light source device of the present invention.
Fig. 2 is the enlarged drawing of the major part of linear light source device shown in Figure 1.
Fig. 3 is the amplification view of substrate, is equivalent to the view of the III-III direction of arrow of Fig. 2.
Fig. 4 is the amplification sectional view along the IV-IV line of Fig. 2.
Fig. 5 is the sectional view along the V-V line of Fig. 4.
Fig. 6 is the integrally-built partial cross section front view of second execution mode of expression linear light source device of the present invention.
Fig. 7 is the view of the VII-VII direction of arrow of Fig. 6.
Fig. 8 is the key diagram of variation of second execution mode of expression linear light source device of the present invention, is the major part enlarged drawing of the leading section of linear light source device.
Fig. 9 is the key diagram of another variation of second execution mode of expression linear light source device of the present invention, is the major part enlarged drawing of the leading section of linear light source device.
Figure 10 is the key diagram of another variation of second execution mode of expression linear light source device of the present invention, is the major part enlarged drawing of the leading section of linear light source device.
Figure 11 is the integrally-built skeleton diagram that the image read-out of Fig. 1 or linear light source device shown in Figure 6 is used in expression.
Figure 12 is the skeleton diagram of the light path from the original copy to the ccd line sensor in the expression image read-out shown in Figure 11.
Figure 13 is the major part enlarged drawing of the 3rd execution mode of linear light source device of the present invention.
Figure 14 is the amplification sectional view along the XIV-XIV line of Figure 13.
Figure 15 is to use the schematic configuration diagram of the flat display apparatus of linear light source device shown in Figure 13.
Figure 16 is the key diagram of variation of the 3rd execution mode of expression linear light source device of the present invention, is equivalent to Figure 14.
Figure 17 is to use the schematic configuration diagram of the flat display apparatus of linear light source device shown in Figure 16.
Figure 18 A is the sectional view of variation of the recess of the expression body that is suitable for being arranged on light guide member.
Figure 18 B is the sectional view of variation of the recess of the expression body that is suitable for being arranged on light guide member.
Figure 19 is the sectional view along the XIX-XIX line of Figure 18 A and Figure 18 B.
Figure 20 is the amplification sectional view of variation of the body of expression light guide member.
Figure 21 is the amplification sectional view of another variation of the body of expression light guide member.
Figure 22 is the amplification sectional view of another variation of the body of expression light guide member.
Embodiment
Below, with reference to accompanying drawing, preferred implementation of the present invention is described.
Fig. 1～Fig. 5 represents first execution mode of linear light source device 100 of the present invention.This linear light source device 100 is by light guide member 120, constitute at the LED element 200 of the both ends of this light guide member 120 configuration.
As shown in Figure 1, light guide member 120 comprises: spread all over columned body 130 that whole length has the same circular cross-section and first end 121 and the second end 122 that forms at the two ends of this body 130.Light guide member 120 for example utilizes the transparent bodies such as transparent resins such as PMMA, Merlon or clear glass integrally formed.Columned body 130 for example be set to the A4 size read the corresponding length of width, diameter for example is about 3mm.In addition, the side face of body 130 forms level and smooth mirror-like at least.
By Fig. 4 and Fig. 5 as can be known, on above-mentioned body 130, in its circumferential certain limit, form the many places recess of alongst arranging 131.For example, this recess 131 is as the expression in detail of Fig. 2, Fig. 4 and Fig. 5 institute, forms in the cylinder that extends along the direction of crosscut body 130 planarly, and for example, its shape is a planar groove in the cylinder about R0.3mm, and depth capacity forms about 0.15mm.In addition, the inlet portion at this recess 131 also is formed with circular arc.The circumferential angular extensions alpha (with reference to Fig. 4) that will form the above-mentioned body 130 of this recess 131 for example is set at 3～45 °, is preferably set to 5～30 ° scope.About this recess 131 interval each other of adjacency, consideration determines to get final product from the distribution of the outgoing light quantity of body 130, will set forth in the back about this point.
As expression in detail among Fig. 2, on the first end 121 and the second end 122 of above-mentioned light guide member 120, be formed with the socket portion 140 of horn shape.The bottom surface of the socket portion 140 of this horn shape is actually the end face 141 of above-mentioned body 130.This end face 141 is that light is from the incident section of LED element 200 towards above-mentioned body 130.And the outer surface of this socket portion 140 preferably covers with non-photic zone 142 such as whitewash, metal film, thereby can prevent the leakage of light.
Above-mentioned LED element 200 constitutes in the following manner, on substrate 210, respectively carry the LED bare chip (hereinafter to be referred as led chip) 201,202,203 of a redness (R), green (G), blue (B), amount to three, and the summit (with reference to Fig. 3) of their central. set triangularity.The size of such led chip 201,202,203 when seeing be on the plane 0.3mm square about, thickness also is same degree.As shown in Figure 3, substrate 210 is for long rectangular-shaped.The material of substrate 210 adopts the splendid aluminium nitride of heat conductivity especially.In an end regions of the length direction of this substrate 210, be formed with LED element mounting portion 211, in this LED element mounting portion 21, be equipped with above-mentioned three led chips 201,202,203.In addition, the zone beyond the above-mentioned LED element mounting portion 211 of substrate 210 has the function as radiating part 212.
In more detail, as shown in Figure 3, dispose an end 215a of common electrode pattern 215 in the LED element mounting portion 211 in aforesaid substrate 210, as chip join pad (pad).R, G, each led chip 201,202,203 of one of B closely are engaged with this chip join mutually with on the pad 215a.On the other hand, with this chip join with the approaching mode of pad 215a, dispose end 216a, a 217a, the 218a of the indivedual power consumption utmost point patterns 216,217,218 corresponding with each led chip 201,202,203.And, between each led chip 201,202,203 and above-mentioned each end 216a, a 217a, 218a, be connected by bonding wire 219 respectively.Like this, adjust luminous quantity separately because can individually adjusting the energising amount of each led chip 201,202,203, so can easily adjust the white light that penetrates from light guide member 120.Separately the other end 215b, 216b, 217b, the 218b of above-mentioned common electrode pattern 215 and each indivedual power consumption utmost point patterns 216,217,218, radiating part 212 as substrate 210 alongst extends when keeping the relation that is parallel to each other.Can well radiating part 212 usefulness of substrate 210 be dealt with the zone of Wiring pattern like this.In addition, these electrode patterns 215,216,217,218 are preferably fired silver paste by printing and are formed, and result, said chip engage with pad 215a and each end 216a that is adjacent, the surface of 217a, 218a becomes the face of reflection efficiency excellence.In addition, can guarantee the current capacity of these portion of terminal like this.
In the above-mentioned LED element mounting portion 211 of aforesaid substrate 210,, also be equipped with the reflection part 220 of the frame shape that forms in mode around above-mentioned three led chips 201,202,203 and bonding wire 219 for example by bonding.As shown in Figures 2 and 3, this reflection part 220 is quadrangle when seeing on the plane, and has the thickness of regulation.At the inner face of the reflection part 220 of this frame shape, be formed with more reflecting surface 221 to top (open side, the right side among Fig. 2) taper that diameter is big more.And this reflection part 220 preferably obtains by the ester moulding that makes white color system.And the overall dimension of this reflection part 220 is corresponding with the inside dimension of the socket portion 140 of the end of above-mentioned light guide member 120.By make this socket portion 140 with above-mentioned reflection part 220 chimeric mutually and bonding suitable part etc., the one assembling is equipped with the substrate 210 and the above-mentioned light guide member 120 of above-mentioned led chip 201,202,203.At this moment, as mentioned above, mutually closely being carried led chip 201,202,203 in LED element mounting portion 211, can't above-mentionedly relatively to have an end of body 130 of light guide member 120 of the diameter about 3mm outstanding, but (with reference to Fig. 4) relatively near the heart therein.And, after this reflection part 220 is carried on substrate 210, fill protection resins 222 such as transparent silicon resin in the mode that encases each led chip 201,202,203 and bonding wire 219.For inner surface or the upper surface (face of open side) that makes above-mentioned reflection part 220 becomes reflecting surface efficiently, also can be on the inner surface or upper surface of the mother metal of the reflection part that forms by resin, form the evaporation layer of metal such as aluminium.
Below, the effect of the linear light source device 100 of said structure is described.
On two ends 121,122 of light guide member 120, if three led chips 201,202,203 are lighted respectively, light then of all kinds is incident to the end face 141 (with reference to Fig. 2) of the body 130 of light guide member 120.At this moment, the light that sends from the end face of each led chip 201,202,203 is directly injected the end face 141 of above-mentioned body 130, and also be reflected reflecting surface 221 reflection of parts 220 of the light that sends from the side of each led chip 201,202,203 is incident to the end face 141 of above-mentioned body 130.And, because each led chip 201,202,203 is carried on the common electrode pattern 215 that the good silver paste of firing reflection efficiency by printing forms, so the light of advancing towards substrate 210 is incident to the end face 141 of above-mentioned body 130 also by the surface reflection of this common electrode pattern 215.In addition, because the chimeric socket portion 140 that has with the horn shape of above-mentioned light guide member 120 one on reflection part 220, and the surface of this socket portion 140 is covered by the non-photic zone 142 of whitewash or metal film, so light can not spill to the outside from this socket portion 140, and is wasted.Thereby, from the auroral poles of each led chip 201,202,203 for being incident to effectively in the light guide member 120.
As mentioned above, in light guide member 120,, schematically show, in body 130,, alongst advance by its smooth surperficial total reflection as Fig. 2 from the light of its first end 121 and the second end 122 incidents.Schematically show as Fig. 5, the part of this light is reflected at above-mentioned recess 131, and converts the direction of advancing along the direction of crosscut body 130 to.Schematically show as Fig. 4, wide the causing towards the regional relative zone with being provided with above-mentioned recess 131 of body 130 that such direct of travel is converted advanced.And in arriving this regional light, the light that arrives the side face of body 130 with the angle littler than the cirtical angle of total reflection penetrates to the outside.So, be set at 3～45 ° if will form the circumferential scope of the above-mentioned body 130 of above-mentioned recess 131, the more preferably central angle scope of 5～30 ° qualification, then utilize owing to body 130 forms the cylindric convex lens effect that produces, the light that can suppress to penetrate is along the circumferential diffusion of body 130, emergent light can be concentrated on as among the regional A of the Rack of target (with reference to Fig. 4).
Because of being arranged on recess 131 on the body 130, the whole length direction setting that spreads all over body 130, so above-mentioned optics act on all can realizing of the whole length direction that spreads all over body 130 everywhere.As a result, on the whole length direction of body 130, mix the light of R, G, B and the white light that forms, can concentrate to regional A from the regulation zone of its side face and penetrate as target.
But the photoconduction that the linear light source device 100 of said structure will send at the led chip 201,202,203 of two end configuration is to the length direction of light guide member 120, therefore, produces more the few more tendency of the inner light quantity of central portion to length direction.Yet, the outgoing light quantity distribution of the length direction of light guide member 120, the interval that can be by making the recess 131 that is arranged on the body 130 or the degree of depth change in the longitudinal direction to be adjusted.For example, make narrowing down gradually towards central portion of recess 131, can make the chance of transverse direction of the light conversion cost body 130 of advancing in the longitudinal direction many more towards central portion more thus in abutting connection with end at interval from body 130.So, can compensate decline in the inside light quantity of the central portion of the length direction of body 130, can make the length direction equalization of outgoing light quantity at body 130.In addition, the degree of depth by making recess 131 deepens towards central portion gradually from the end of body 130, also can obtain same effect.
In the linear light source device 100 of said structure, because being configured in three led chips 201,202,203 of the end of light guide member 120 is configured on the substrate 210 thick and fast, therefore, the illuminant colour of R, G, B mixes to be incorporated in the light guide member 120 equably and advances.As a result, can on the length direction of light guide member 120, penetrate the uniform white light of color.
In addition, in the linear light source device 100 of said structure, the material as the substrate 210 that is suitable for carrying led chip 201,202,203 adopts aluminium nitride especially, and in addition, above-mentioned led chip 201,202,203 directly is bonded on this substrate 210.Led chip generally has the significant characteristic of thermal degradation when.That is, led chip penetrates the light of measuring corresponding light quantity with energising, but owing to according to the heating of energising amount, so consider the lifetime that is caused by thermal conductance usually, during use standard energising amount is set at than low value.Therefore, use in the LED of resin-encapsulated type lamp under the situation of led chip, perhaps, carrying under the situation on the substrate that expoxy glass, aluminium oxide ceramics are made, generally this standard energising amount is up to about 20mA.But, the linear light source device 100 of said structure, high in pyroconductivity, for example be directly to engage led chip 201,202,203 on the substrate 210 made of the aluminium nitride of 200W/mK, therefore, even increase the energising amount of each led chip 201,202,203 relatively, the heat that also can on substrate 210, leave immediately and produce.Therefore, can keep high outgoing light quantity and can suppress heating up, can suppress the deterioration of led chip 201,202,203.
In the linear light source device 100 of said structure, an end regions of the length direction of substrate 210 as LED element mounting portion 211, and is wholely set connected radiating part 212, therefore, above-mentioned radiating effect further improves.And, in order further to improve this radiating effect, the for example fin of aluminum (diagram is omitted) is installed on the radiating part on the substrate 210 212, above-mentioned radiating part 212 is contacted with the metal cabinet of the device that is assembled with this linear light source device 100, this is all very effective.
According to experiment, as shown in Figure 3, forming by thickness on the substrate 210 of the nitrogenize aluminum of wide 5.0mm, long 18.0mm, thick 0.6mm is the electrode pattern 215～218 that the silver paste of 10 μ m constitutes, intensive configuration sized be about 0.22mm * 0.29mm * 0.29mm and when using rated current be R, the G of 20mA, the led chip 201,202,203 of B, the energising that each led chip 201,202,203 is carried out 50mA makes it luminous continuously, and the light quantity deterioration after 150 hours is in 10%.And following situation has been considered in the setting of this continuous fluorescent lifetime: when stating linear light source device 100 as the lighting source of image read-out in the use, make it possible to read 50,000 original copys with the speed about 10 seconds.
And, in order to compare, only the material of substrate 210 is changed into epoxy glass substrate with above-mentioned experimental result, and the energising that each led chip 201,202,203 is carried out 50mA makes it luminous continuously, as can be known, the light quantity deterioration after 150 hours surpasses 20%, and is not durable.
Fig. 6 and Fig. 7 represent second execution mode of linear light source device of the present invention.The linear light source device 100A of this second execution mode disposes LED element 200 on an end (first end) 121 of light guide member 120, another end (the second end) 122 is provided with reflecting surface 124.In this, the linear light source device 100 of first execution mode of linear light source device 100A and Fig. 1～shown in Figure 5 is different.Below, the difference of this linear light source device 100A and linear light source device 100 is described.For common ground, mark and the identical symbol of symbol that the linear light source device 100 of first execution mode is marked omit its detailed explanation.
Same with first execution mode, on the first end 121 of above-mentioned body 130, dispose a plurality of led chips 201,202,203 that carried on substrate 210.But, in this second execution mode, as shown in Figure 7, be respectively two redness (R), green (G), blue (B) led chip 201,202,203, amount to six, be configured in the chip join of common electrode pattern 215 thick and fast with on the pad 215a in the mode that forms three of two row, every row.Each led chip 201,202,203 also is connected with end 216a, 217a, a 218a of indivedual power consumption utmost point patterns 216,217,218 of usefulness of all kinds by bonding wire 219.Thus, can increase the light quantity that is incident to body 130 from the first end 121 of light guide member 120.Thereby,, the light of enough amounts is propagated in the zone of the whole length direction of light guide member 120 although only on an end 121 of light guide member 120, dispose led chip 201,202,203.
Light from above-mentioned led chip 201,202,203 ejaculations, utilize effect, the effect of reflection part 220 by using silver paste to improve the electrode pattern 215 of light emission effciency, can not be incident to lavishly in the body 130, and advance in the inside of this body 130.The light of advancing in this way or be reflected and the light of advancing to opposite direction at the reflecting surface 124 of the second end 122 of light guide member 120, a plurality of recesses 131 reflections that spreaded all over the length direction setting of body 130, direct of travel is converted be provided with to the direction of opposition side of a side of this recess 131, and penetrate to the outside.So, spreading all over of body 130 whole length direction everywhere, the white light that the light of R, G, B mixes can penetrate the same (with reference to Fig. 4) that this point is illustrated with first execution mode towards the regional centralized as target from the regulation zone of its side face.But, in this second execution mode, because only an end 121 of light guide member 120 is provided with a plurality of led chips 201,202,203, so it has the following advantages, the mixed proportion of the light of R, G, B becomes more even on the length direction of light guide member 120, the ejaculation endlong that can spread all over light guide member does not have anisochromatic white light.
And, as long as the second end 122 of the light guide member 120 in above-mentioned second execution mode can be reflected in the light of advancing in the inside of body 130 effectively, be not limited to said structure.For example, as shown in Figure 8, the second end 122 also can be roughly the tilt the second end 122a of the section triangle shape that two reflectings surface of 45 degree constitute of the axis by relative body 130.Like this, most light of advancing along its axis direction in body 130 inside carry out twice total reflection on these two reflectings surface, thereby advance to opposite direction.Its reason is that the light that arrives this each reflecting surface with the angle littler than the cirtical angle of total reflection is less.According to this structure, can obtain with second execution mode in the little effect of the second end 122 difference, and only can form the shape of the second end 122a by aforesaid way, can simplify manufacturing process thus.And, in order to make reflection of light efficient better, also can be on the second end 122a that forms in the above described manner chimeric lid or the evaporation metal that constitutes by the resin of white color system.In addition, also can make the second end 122 for the axis with relative body 130 shown in Figure 9 roughly the tilt the second end 122c of pyramid shape of crest lines of 45 degree of the second end 122b of cone shape of buses of 45 degree or the axis with relative body 130 shown in Figure 10 that roughly tilts, also can obtain same effect.
In the linear light source device 100 of above-mentioned first execution mode and second execution mode, 100A, as the recess 131 that in the body 130 of light guide member 120, is provided with, the form of planar groove in the cylinder that the direction that employing intersects along the long axis with the outer peripheral face of body 130 is extended, but, pattern as this recess 131, also can be the depression 131a of concave spherical surface shape as Figure 18 A, Figure 18 B and shown in Figure 19.In the case, can be shown in Figure 18 A, a plurality of depression 131a of configuration in the scope of the circumferential predetermined angular α of body 130 also can be shown in Figure 18 B, at one circumferential of the certain position configuration of body 130 131a that caves in.And under the situation of any in Figure 18 A, Figure 18 B, these depressions 131a all separates the mode of arranging on predetermined distance ground with the length direction along body 130 and forms.In addition, by adjusting these interval of depression 131a on the length direction of body 130, perhaps change the degree of depth, the size of depression in the longitudinal direction, can adjust the outgoing light quantity of illumination light everywhere of the length direction of body 130, this and above-mentioned execution mode are same.Like this, adopt the mode of the depression 131a of concave spherical surface shapes, the making that has the mould that is used to form this depression 131a thus easy advantage that becomes as recess 131.
The linear light source device 100 of said structure, 100A can replace existing cold-cathode tube and as the lighting source of image read-out 300 such as ccd image sensor unit.As shown in figure 11, this image read-out 300 is assembled with linear light source device 100, a plurality of speculum 21～25, lens 3, CCD line sensor 4 and constitutes in shell 5.Image read-out 300 moves along sub scanning direction below the original copy mounting table DP that is made of clear glass etc. in flatbed image analyzer S.At work, from the reverberation of the original copy D of the optical illumination that is sent by above-mentioned linear light source device 100 by after a plurality of speculums 21～25 reflections, scioptics 3 by optically focused on ccd line sensor 4.At this moment, the imaging and being read on ccd line sensor 4 of the image on the line that extends along main scanning direction on the original copy D.Whenever repeat this action at this image read-out 300 when sub scanning direction moves prescribed distance, thus, the two dimensional image of original copy is read.
As previously mentioned, body 130 as the light guide member 120 of its luminous component in the linear light source device 100 of said structure of the present invention is cylindric, therefore, need not how many changes on the position of installation cold-cathode tube in above-mentioned image read-out 300 just can assemble well.And this linear light source device 100 can be from the side face of the opposition side at the position of the above-mentioned recess 131 of the formation the body 130, efficiently to the direction irradiates light (with reference to Fig. 4) that limits.Certain zone that the original copy of this exit direction in flatbed image analyzer S reads the sub scanning direction of the original copy D on the platform DP.So linear light source device 100 of the present invention is different with the cold-cathode tube that penetrates light from whole peripheral surface, need not to increase reflection part, just can be towards certain qualification direction irradiates light on whole length direction.
In addition, Figure 12 is illustrated under the situation of using ccd image sensor unit U, the schematic diagram that will arrive ccd line sensor 4 from original copy D scioptics 3, mirror 21～25 folding light paths that are reflected is launched.As known in the figure, the angle of visual field that reads width of the original copy D when ccd line sensor 4 or lens 3 are watched for example extends to about 50 °.Thus, with from original copy read width central authorities near compare to the light path of ccd line sensor 4, obviously longer from the end of reading width to the light path of ccd line sensor 4.Therefore, original copy is thrown light on uniform brightness even spread all over the whole width that reads, the image that reads on ccd line sensor 4 also is dark more the closer to above-mentioned end of reading width.
In this case, though can carry out the brightness revisal on main scanning direction to the signal that is read by ccd line sensor 4, correcting circuit is complicated in the case.Yet, in linear light source device 100 of the present invention, make and to compare with the central portion of the length direction (corresponding) of light guide member 120 with main scanning direction, the outgoing light quantity at both ends is bigger, thus, and relative original copy D, read the width central portion with it and compare, can make its both ends be shone brightlyer.As a result, need not above-mentioned correcting circuit, can make the brightness of the image that reads by ccd line sensor 4 on main scanning direction evenly.
For this reason, the decline of the inside light quantity that the distance of the end of consideration and light guide member 120 causes, proper spacing is set at the interval that for example will be arranged on the recess 131 of the adjacency on the body 130 of above-mentioned light guide member 120 for, perhaps, with the above-mentioned decline of similarly considering the inside light quantity that the distance with the end of light guide member 120 causes, the degree of depth ground that suitably changes above-mentioned recess 131 is set, and can easily realize thus.
And linear light source device 100 of the present invention makes the LED element of R, G, B simultaneously luminous, penetrates white light thus, but, because Wavelength distribution of all kinds is the cliffy summit shape, so the color treatments of the coloured image that is easy to read can make the color characteristics of coloured image of reproduction good.
Figure 13 and Figure 14 represent the 3rd execution mode of linear light source device of the present invention.(Fig. 1～Fig. 5) difference with second execution mode (Fig. 6 and Fig. 7) is for the linear light source device 100B of the 3rd execution mode and first execution mode, on the outer peripheral face of the body 130 of light guide member 120, the circumferential scope α (with reference to Figure 14) that will form the recess of alongst arranging 131 is extended to 120～270 °, preferably is extended to 120～200 °.Other structure is identical, therefore marks the reference symbol identical with the symbol that marks in first and second execution modes on corresponding components or part, and omits its detailed explanation.And, making the external diameter of body 130 thicker, the number of all kinds of the led chip 201,202,203 of the end that will be configured in light guide member 120 is increased than external diameter in the first and second execution mode illustrated, this all is fine.In addition, this led chip 201,202,203 can be as described in first execution mode of Fig. 1～shown in Figure 5, be arranged on the first end 121 and the second end 122 of light guide member 120, also as described in second execution mode that can represent as Fig. 6 and Fig. 7, only be arranged on an end (first end) 121 of light guide member 120.Like this, only under the situation that led chip 201,202,203 is set on the first end 121, formation and Fig. 6 and the same reflecting surface 124 of second execution mode shown in Figure 7 on the second end 122 of light guide member 120, perhaps same with the variation of second execution mode of Fig. 8～shown in Figure 10, the second end is formed the shape of 122a, 122b, 122c.
As shown in figure 14, under the situation of this execution mode, when the light of alongst advancing in body 130 is reflected by each recess 131, when its direct of travel is converted into the direction of crosscut body 130, the light that is reflected with the central angle scope of broadness penetrates to the outside in crosscut body 130 backs, therefore, the light beam after the ejaculation is enlarged to wider scope 120～200 ° scope of the central angle of body 130 (for example, as).But less in the light quantity that a side leakage that is provided with above-mentioned recess 131 goes out, can penetrate light within the specific limits effectively, this point is identical with first execution mode.
As shown in figure 15, by the linear light source device 100B of a plurality of the 3rd execution modes is set simultaneously, become the backlight (lighting device) of flat display apparatus such as being applicable to liquid crystal indicator 400.That is, in the behind of two-d display panel 410, so that, a plurality of above-mentioned linear light source device 100B are set simultaneously with predetermined distance from the exit direction of body 130 mode towards the back side of two-d display panel 410 direction.
As mentioned above, because the scope of the emergent light of this linear light source device 100B is wide, so, also can illuminate the wide banded scope of width although be linear light source device.Therefore, connect, thereby no matter be how broad two-d display panel 410, also can use these linear light source devices 100B with average light quantity it to be illuminated from behind by a plurality of this banded scopes of making are set simultaneously.In the case, preferably between the back side and each linear light source device 100B of two-d display panel 410, set in advance light diffusing sheet or light diffusing sheet 420, thus, can make from the brightness of the face side of this two-d display panel 410 identification more even.
In addition, as shown in figure 16, if make the circumferential scope α of the recess 131 of the body 130 that will form light guide member 120 be extended to 270 °, then the illumination light that penetrates from each linear light source device 100B is except towards the back side of two-d display panel 410, also to the side irradiation opposite with two-d display panel 410.In the case, be provided with outside above-mentioned light diffusing sheet or the light diffusing sheet 420, as shown in figure 17, have the light reflecting board 430 of the reflecting surface of white reflecting surface, mirror-like in the rear side setting of each linear light source device 100B, the light that the rear side to each linear light source device 100B can be penetrated reflects towards the rear side of two-d display panel 410 thus.Thereby can be with the rear side of uniform more light quantity irradiated plane display floater 410 in the face.
In the prior art, backlight as this flat display apparatus has adopted cold-cathode tube, but, as mentioned above, by being replaced as the lighting device that uses linear light source device 100B, not only can save electric power, the white light that can also produce with R, G, the B very steep three-colour light-emitting of Wavelength distribution of all kinds throws light on, therefore, can obtain to make the distinct more excellent results of color development of color liquid crystal display arrangement.
And, backlit illumination source as flat display apparatus 400, except being set up in parallel and using linear light source device 100B with Figure 14 and body 130 shown in Figure 16, also can be set up in parallel and use have Figure 18 A, the linear light source device 100 of the body 130 shown in Figure 18 B.The recess 131 of the linear light source device of this mode adopts the mode of the depression 131a of concave spherical surface shapes, and produces the tendency that the reverberation on the inner face of this depression 131a spreads, and the tendency that the emergent light from body 131 also spreads occurs thereupon.As a result, back side illuminaton that can opposite planar display floater 410 is illumination light more uniformly.
By above explanation as can be known, according to linear light source device of the present invention, the first, be suitable for use as the lighting source of the image read-out that has used the linear transducer of CCD and replace existing cold-cathode tube.Promptly, needn't worry the caused environmental pollution of mercury vapor, also need not the power circuit of boosting inverter etc., can more suitably carry out the white illumination of color processing, and, its luminous efficiency excellence, in addition, the problem owing to the hot lifetime that causes of employed led chip also can access suitable solution.The second, can be suitable for constituting lighting device as the backlight of flat display apparatus.
Certainly, scope of the present invention is not limited to above-mentioned execution mode, and all changes in the described scope of each claim include within the scope of the present invention.
In above-mentioned each execution mode, as on the body 130 of light guide member 120, spreading all over the recess 131 that length direction is provided with, the direction that employing intersects along the long axis with body 130 is extended and the cross section is the mode of groove planar in the circular arc roughly, or as Figure 18 A, Figure 18 B and shown in Figure 19, adopt the mode of the depression 131a of concave spherical surface shape, but, not limited thereto as the mode of recess 131.Main points are, the circumferential formation scope α of the body 130 of such recess 131 will be set by regulation, can be limited to the interior illumination light that penetrates of circumferential scope of the regulation of body 130, in addition, the formation density of the recess 131 of the length direction by adjusting body 130 can be adjusted to the outgoing light quantity everywhere of the length direction of body 130 amount of expectation.
In addition, in above-mentioned each execution mode, be formed with recess 131, but also protuberance can be set.
And in above-mentioned each execution mode, the body 130 of light guide member 120 forms cylindric, still, so long as column, is not limited to so cylindricly, also can adopt the mode of polygonal columns such as hexagon prism, octagonal column as Figure 20 and shown in Figure 21.In the case, the crest line of polygonal column part preferably forms fillet (round) in section.And, can certainly form the elliptical cylinder shape as shown in figure 22.
In addition, in above-mentioned each execution mode, carry R, the G of quantity difference identical (one or two), the led chip 201,202,203 of B in the LED element mounting portion 211 in substrate 210, still, need only the led chip that carries at least of all kinds, its quantity is restriction not.For example, at present, blue (B) is emitting led, and to compare light quantity lower with the LED of other color, in the case, also can only carry the emitting led chip of two bluenesss (B), and respectively carry a redness (R) and green (G).
In addition, in above-mentioned each execution mode, in LED element mounting portion 211, be equipped with the led chip 201,202,203 of R, G, B, still, also can carry the White LED chip.In the case, need not to adjust the light quantity of led chip of all kinds, use a power consumption utmost point pattern to get final product in order to penetrate white light.Therefore, the parts number average of manufacturing process and use reduces, thereby can cut down manufacturing cost.And White LED needs only the position of carrying in the lift-launch that does not hinder reflection part 220.And its quantity and unrestricted.
Claims (35)
1. a linear light source device is characterized in that, comprising:
Light guide member, it has by the transparent body and forms the much the same column in cross section and have the body of specific length and first end and the second end that forms at the two ends of this body; And
The LED element of relative with described first end respectively configuration with described the second end,
The outer peripheral face of described body forms smooth mirror-like, and spreads all over length direction, is formed with a plurality of recesses or protuberance in the scope of its circumferential regulation,
Has following tendency thus, be incident to the light from described LED element of described body from described first end and described the second end, the length direction that spreads all over described body penetrates from the zone that the scope with being formed with described recess or protuberance of the side face of described body is relative.
2. a linear light source device is characterized in that, comprising:
Light guide member, it has by the transparent body and forms the much the same column in cross section and have the body of specific length and first end and the second end that forms at the two ends of this body;
The LED element of relative configuration with described first end; And
The reflecting part that on described the second end, forms,
The outer peripheral face of described body forms smooth mirror-like, and spreads all over length direction, is formed with a plurality of recesses or protuberance in the scope of its circumferential regulation,
Have following tendency thus, be incident to the light from described LED element of described body, spread all over the length direction of described body, penetrate from the relative zone of the scope with being formed with described recess or protuberance of the side face of described body from described first end.
3. linear light source device as claimed in claim 2 is characterized in that:
Described reflecting part is the reflecting surface with the orthogonal axe of body.
4. linear light source device as claimed in claim 2 is characterized in that:
Described reflecting part is the axis of relative body roughly two reflectings surface of 45 degree that tilt.
5. linear light source device as claimed in claim 2 is characterized in that:
Described reflecting part is axis with the relative body roughly cone shape of the buses of 45 degree that tilts.
6. linear light source device as claimed in claim 2 is characterized in that:
Described reflecting part is axis with the relative body roughly pyramid shape of the crest lines of 45 degree that tilts.
7. linear light source device as claimed in claim 2 is characterized in that:
Described reflecting part is covered by the resin of white color system.
8. linear light source device as claimed in claim 2 is characterized in that:
Described reflecting part forms by evaporation metal.
9. linear light source device as claimed in claim 1 or 2 is characterized in that:
The described transparent body is made of transparent resin or clear glass.
10. linear light source device as claimed in claim 1 or 2 is characterized in that:
The described body of described light guide member is much the same cylindric in cross section.
11. linear light source device as claimed in claim 1 or 2 is characterized in that:
The described body of described light guide member is the much the same polygonal column in cross section.
12. linear light source device as claimed in claim 11 is characterized in that:
The crest line of the body of the polygonal column that described cross section is much the same forms fillet part in the cross section.
13. linear light source device as claimed in claim 1 or 2 is characterized in that:
The described body of described light guide member is the much the same elliptical cylinder shape in cross section.
14. linear light source device as claimed in claim 1 or 2 is characterized in that:
Described a plurality of recess or protuberance form by the groove that a plurality of directions of intersecting along the long axis with described body are set every predetermined distance extend.
15. linear light source device as claimed in claim 14 is characterized in that:
The cross section of described groove is concave arc shape roughly.
16. linear light source device as claimed in claim 1 or 2 is characterized in that:
Described a plurality of recess or protuberance form by the depression that a plurality of concave spherical surface shapes are set.
17., it is characterized in that as each described linear light source device in claim 1 and 2:
Described LED element uses led chip, and this led chip is directly carried on the substrate that aluminium nitride is made.
18. linear light source device as claimed in claim 17 is characterized in that:
Described substrate comprises LED element mounting portion of carrying described LED element and the radiating part that is connected with this LED element mounting portion.
19. linear light source device as claimed in claim 18 is characterized in that:
On described substrate, be formed with common electrode pattern and a plurality of indivedual power consumption utmost point pattern, in described LED element mounting portion, a plurality of led chips are bonded on the described common electrode pattern thick and fast, and connect by wire-bonded respectively between each led chip and described indivedual power consumption utmost point patterns corresponding with them.
20. linear light source device as claimed in claim 19 is characterized in that:
Described substrate forms long chi shape, on the zone of an end of its length direction, be formed with described LED element mounting portion, and on its all the other zones, described common electrode pattern and described a plurality of indivedual power consumption utmost point patterns are to keep the relation that is parallel to each other and to form along the mode that the length direction of described substrate extends.
21. linear light source device as claimed in claim 19 is characterized in that:
Described a plurality of led chip is made of at least one emitting red light led chip, at least one green emitting led chip and at least one blue-light-emitting led chip.
22. linear light source device as claimed in claim 21 is characterized in that:
Firing silver paste with described LED element mounting portion corresponding position by printing at least and form in described common electrode pattern and the described a plurality of indivedual power consumption utmost point patterns.
23. linear light source device as claimed in claim 21 is characterized in that:
The reflection part of the frame shape that forms in the mode around described a plurality of led chips is installed in the described LED element mounting portion of described substrate.
24. linear light source device as claimed in claim 23 is characterized in that:
Described reflection part is making interior face tilt towards the big more mode of upper opening diameter more, and this inner face is used as reflecting surface.
25. linear light source device as claimed in claim 24 is characterized in that:
Described reflection part is formed by the resin of white color system.
26. linear light source device as claimed in claim 24 is characterized in that:
Described reflection part is formed by resin, and has implemented mirror process on the face within it.
27. linear light source device as claimed in claim 23 is characterized in that:
In the end relative with described led chip of described light guide member, the reflection part that is formed with described relatively frame shape is with the chimeric socket portion of the mode that it is included.
28. linear light source device as claimed in claim 27 is characterized in that:
The outer surface of described socket portion is covered by non-photic zone.
29. linear light source device as claimed in claim 1 or 2 is characterized in that:
On the outer peripheral face of described body, the circumferential prescribed limit that will form alongst a plurality of recesses arranged or protuberance is set to 3～45 ° central angle scope of described body.
30. linear light source device as claimed in claim 1 or 2 is characterized in that:
On the outer peripheral face of described body, the circumferential prescribed limit that will form alongst a plurality of recesses arranged or protuberance is set to 120～270 ° central angle scope of described body.
31. image read-out, it comprises light supply apparatus, a plurality of speculum, lens and ccd line sensor in the enclosure, will be from by the reverberation of the original copy of the optical illumination that sends from described light supply apparatus, by described a plurality of speculums and described lens directs to described ccd line sensor, read the image of the wire of the main scanning direction in the described original copy by described ccd line sensor, it is characterized in that:
As described light supply apparatus, use the described linear light source device of claim 29.
32. image read-out as claimed in claim 31 is characterized in that:
Be arranged on described a plurality of recesses of described body of described light guide member or protuberance with more towards the both ends of the length direction of described body, compare with the length direction central portion, the mode that the outgoing light quantity is many more forms.
33. a flat display apparatus, it comprises two-d display panel and the lighting device that from behind this two-d display panel is thrown light on, and it is characterized in that:
Described lighting device constitutes by the described linear light source device of a plurality of claims 30 is set simultaneously.
34. flat display apparatus as claimed in claim 33 is characterized in that:
Between described two-d display panel and described lighting device, dispose light diffusing sheet or light diffusion panel.
35. flat display apparatus as claimed in claim 33 is characterized in that:
Side opposite with described two-d display panel at described lighting device disposes light reflection surface.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP046829/2006 | 2006-02-23 | ||
| JP2006046829 | 2006-02-23 | ||
| JP090462/2006 | 2006-03-29 |
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| Publication Number | Publication Date |
|---|---|
| CN101390376A true CN101390376A (en) | 2009-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800063992A Pending CN101390376A (en) | 2006-02-23 | 2007-02-22 | Linear light source device, and image reading device and planar display device using the linear light source device |
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| Country | Link |
|---|---|
| CN (1) | CN101390376A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103782581A (en) * | 2011-09-07 | 2014-05-07 | 立志凯株式会社 | Document reader |
| CN104570193A (en) * | 2013-10-09 | 2015-04-29 | 虹光精密工业股份有限公司 | Double-slope light guide column and light source module and scanner optical assembly using same |
| CN108131591A (en) * | 2016-12-01 | 2018-06-08 | 夏普株式会社 | Lighting device, image read-out and image forming apparatus |
| CN109040508A (en) * | 2017-06-12 | 2018-12-18 | 菱光科技股份有限公司 | Light source module group and image-taking device |
| CN109196273A (en) * | 2016-05-12 | 2019-01-11 | 亮锐控股有限公司 | Lighting arrangements with light guide |
-
2007
- 2007-02-22 CN CNA2007800063992A patent/CN101390376A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103782581A (en) * | 2011-09-07 | 2014-05-07 | 立志凯株式会社 | Document reader |
| CN103782581B (en) * | 2011-09-07 | 2016-09-14 | 立志凯株式会社 | Original document reading apparatus |
| CN104570193A (en) * | 2013-10-09 | 2015-04-29 | 虹光精密工业股份有限公司 | Double-slope light guide column and light source module and scanner optical assembly using same |
| CN109196273A (en) * | 2016-05-12 | 2019-01-11 | 亮锐控股有限公司 | Lighting arrangements with light guide |
| CN109196273B (en) * | 2016-05-12 | 2021-03-12 | 亮锐控股有限公司 | Lighting arrangement with light guide |
| CN108131591A (en) * | 2016-12-01 | 2018-06-08 | 夏普株式会社 | Lighting device, image read-out and image forming apparatus |
| CN109040508A (en) * | 2017-06-12 | 2018-12-18 | 菱光科技股份有限公司 | Light source module group and image-taking device |
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Open date: 20090318 |