CN100543605C - Line head module, exposure device, imaging device - Google Patents

Abstract

A kind of line head module, it possesses line head, described line head has a plurality of light-emitting components of proper alignment configuration, by from the light of described light-emitting component and the photographic layer of photosensitive drum body is exposed, wherein, described line head module possesses: supporting mass, and it has the turning axle of the rotating shaft parallel of described relatively photosensitive drum body; A plurality of described line heads, it is set on the side face of described supporting mass and by described supporting mass and supports, and constituting by described supporting mass is center rotation and the structure can described relatively photosensitive drum body switched with described turning axle.

Description

Line head module, exposure device, imaging device

Technical field

The present invention relates in imaging device as exposure device and line head module that is used and the exposure device that possesses this line head module, imaging device.

Advocate right of priority the 2005-No. 066802 for No. the 2005-066799, Japan's patented claim being applied on March 10th, 2005, No. the 2005-066800, Japan's patented claim, No. the 2005-066801, Japan's patented claim and Japan's patented claim, the application quotes its content at this.

Background technology

As the printer that has utilized the electrofax mode, known have a line printer (imaging device).This line printer is on the side face as the photosensitive drum body (drum) that is exposed portion, near devices such as the printhead (line head) that has disposed charged device, wire, developer, transfer printing devices.Promptly, on side face because of the charged photosensitive drum body of charged device, the luminous action of the selection by the light-emitting component that is provided with on the printhead exposes, thereby formation electrostatic latent image, the toner that utilization provides from developer and make this image development, and utilize the transfer printing device should mix colours as transfer printing on paper.

But, as the light-emitting component of above-mentioned printhead, generally use LED (light emitting diode) etc., when this moment, exist precision to arrange the very problem of difficulty of thousands of luminous points goodly.Therefore, in recent years, following imaging device (for example opening communique 2003-No. 1864 with reference to the spy) is proposed, it possesses the light-emitting component array as printhead, and described light-emitting component array is with EL element (electroluminescent cell), especially handle the organic EL of luminous point well as light-emitting component with precision.

On printhead in the past, use LED or EL element situation,,,, do not have other method except increasing the life-span of light source in order to increase the number that to typewrite of printer owing to be the structure of on photosensitive drum body of all kinds, distributing a printhead as light source.In addition, the light quantity that increases light source in order to obtain typing speed at a high speed is necessary, but the situation of organic EL especially has the tendency that makes lifetime in order to keep high light quantity, and the number that causes typewriting reduces.

And, because the fineness of printhead is certain,, become the situation of harsh technical requirement so exist when exporting lines.

Summary of the invention

The object of the present invention is to provide a kind of life-span long and can carry out the line head module of flying print and possess exposure device, the imaging device of this line head module.

In addition, if known EL element contact then this fact of generation deterioration with moisture or oxygen in the atmosphere, thereby in order to form EL element, need be in order to prevent itself and the discontiguous a certain hermetically-sealed construction of atmosphere.As the encapsulating method of EL element, that is, with bonding agent with the method for stick together between the glass substrate (flat seal) with the method for the airtight covering of drying agent (jar sealing) EL element is set on the glass of having implemented to dig structure or metal parts.Especially jar employed component processing cost height with the structure of digging of sealing, and the employed situation of the light source of printhead is a slim-lined construction, thus only not expensive, and be difficult to keep intensity, metal in addition situation is difficult to guarantee precision.

Other purposes of the present invention are the exposure device, the imaging device that a kind of line head module are provided and possess this line head module, the described line head module life-span is long and can obtain sufficient print speed printing speed, can further reduce component costs or manufacturing cost, have the hermetically-sealed construction that can keep full intensity.

The situation of the output device of the printer of toner fixing type or duplicating machine etc. is provided with in machine and makes the position of toner heat fixation, so become the high temperature more than 50 ℃ in the machine.In addition,, in order to produce so high light quantity, on light-emitting component, consume bigger electric load, thereby make the light-emitting component heating the high light quantity of light source requirements of the printhead of printer etc. in order to carry out at a high speed typewriting.Worry that these heat can become the main cause that light-emitting component is worsened.

Thereby other purposes of the present invention are to provide a kind of line head module, the exposure device that possesses this line head module, imaging device that prevents to improve because of the deterioration of thermal conductance electroluminescent element durability.

In order to solve above-mentioned problem, the invention provides a kind of line head module, it possesses line head, described line head has a plurality of light-emitting components of proper alignment configuration, by from the light of described light-emitting component and the photographic layer of photosensitive drum body is exposed, wherein

Described line head module possesses supporting mass, and this supporting mass has the turning axle of the rotating shaft parallel of described relatively photosensitive drum body;

Described line head is provided with a plurality of, a plurality of described line heads, be set on the side face of described supporting mass and and support by described supporting mass, constituting by described supporting mass is center rotation and the structure can described relatively photosensitive drum body switched with described turning axle, switch described a plurality of line head according to the reduction of described light-emitting component light quantity, make one of described a plurality of line heads corresponding with described photosensitive drum body.Described supporting mass also can be by column (multiedge cylinder etc.) or tabular body.

According to this structure, owing to can distribute a plurality of line heads,, can carry out at a high speed and the typewriting of high light quantity so can prolong life-span of line head as module to a photosensitive drum body.In addition, owing to carry out the switching of line head by the rotation of supporting mass, the compactness so the structure of line head module self becomes can make the exposure device miniaturization, and then make with the imaging device miniaturization of this exposure device as exposure mechanism.

In addition, can steady in a long-term keep certain typewriting quality.Can also can wait the reduction of judging light quantity by the reduction of Direct-detection Optical amounts such as sensor based on typewriting condition (light quantity, print speed printing speed etc.) or typewriting number.In addition, preferably carry out the switching of line head automatically according to the reduction of light quantity.

In the present invention, also can be following structure, on described a plurality of line heads, be respectively arranged with the optical imaging system that is used to make from the photoimaging of described light-emitting component.

According to this structure, from the light effect imaging on photosensitive drum body better of each light-emitting component ejaculation.

In the present invention, also can constitute described light-emitting component is electroluminescent cell (EL element).

Though it is low that EL element and LED etc. compare brightness (light quantity), in the present invention, use a plurality of line heads by switching ground, therefore state that can the long term maintenance high brightness possesses high practicality fully.In addition, as EL element, preferably use especially and can do the precision of luminous electricity than the higher organic EL that gets.

In addition, the invention provides a kind of exposure device, it possesses: described line head module of the present invention; And the photosensitive drum body that is exposed by light from the light-emitting component that described line head module had.And the invention provides the imaging device that possesses described exposure device as exposure mechanism.

According to this structure, can provide and to carry out at a high speed and the many imaging devices of typewriting number.

All right, in described a plurality of line heads, comprise the multiple line head that specification is different, switch according to purposes between the different line head of these specifications and use.Described supporting mass also can be made of column (multiedge cylinder etc.) or tabular body.

According to this structure, owing to can distribute a plurality of line heads,, can carry out at a high speed and the typewriting of high light quantity so can prolong life-span of line head as module to a photosensitive drum body.In addition, owing to carry out the switching of line head by the rotation of supporting mass, the compactness so the structure of line head module self becomes can make the exposure device miniaturization, and then make with the imaging device miniaturization of this exposure device as exposure mechanism.And, owing on same supporting mass, be provided with the different line head of a plurality of specifications,, can always be met the output of customer requirements so use these line heads by switching according to purposes.In addition,, can effectively apply flexibly each line head, making the high standardization of the output device of printer etc. simultaneously by switch using line head.

In the present invention, also can be: be provided with a plurality ofly about the line head of the same specification of the high kind of relative application frequency in the different line head of described specification, use be switched in the reduction according to the light quantity of described light-emitting component between the line head of these same specifications.

According to this structure,, also can obtain typewriting quality steady in a long-term even make light quantity reduce the mode of typewriting rapidly for the frequency of utilization height.In addition, can also can wait the reduction of judging light quantity by the reduction of Direct-detection Optical amounts such as sensor based on typewriting condition (light quantity, print speed printing speed etc.) or typewriting number.In addition, preferably carry out the switching of line head automatically according to the reduction of light quantity.

In the present invention, also can be on described a plurality of line heads, to be respectively arranged with the structure that is used to make from the optical imaging system of the photoimaging of described light-emitting component.

According to this structure, can make light imaging on photosensitive drum body of penetrating from each light-emitting component more well.

Described light-emitting component also can be an electroluminescent cell (EL element).

Though it is low that EL element and LED etc. compare brightness (light quantity), in the present invention, use a plurality of line heads by switching ground, therefore state that can the long term maintenance high brightness possesses high practicality fully.In addition, as EL element, preferably use especially and can do the precision of luminous electricity than the higher organic EL that gets.

In addition, the invention provides a kind of exposure device, it possesses: described line head module of the present invention; And the photosensitive drum body that is exposed by light from the light-emitting component that described line head module had.And the invention provides the imaging device that has possessed described exposure device as exposure mechanism.

According to this structure, can provide and to carry out at a high speed and the many imaging devices of typewriting number.

The invention provides a kind of line head module, it possesses line head, and described line head has a plurality of light-emitting components of proper alignment configuration, by the photographic layer of photosensitive drum body being exposed from the light of described light-emitting component, wherein,

Described line head module possesses:

Supporting mass, it has the turning axle of the rotating shaft parallel of described relatively photosensitive drum body;

A plurality of described line heads, it is set on the side face of described supporting mass, and constituting by described supporting mass is center rotation and the structure can described relatively photosensitive drum body switched with described turning axle,

Described line head supports the face that has formed described EL element one side by described supporting mass, and seals described EL element by described supporting mass.Described supporting mass can be made of column (multiedge cylinder etc.) or tabular body.

According to this structure, owing to can distribute a plurality of line heads,, can carry out at a high speed and the typewriting of high light quantity so can prolong life-span of line head as module to a photosensitive drum body.In addition, owing to carry out the switching of line head by the rotation of supporting mass, the compactness so the structure of line head module self becomes can make the exposure device miniaturization, and then make with the imaging device miniaturization of this exposure device as exposure mechanism.And, because supporting mass is the double structure of doing the general seal member of the EL element that seals each line head,, can reduce the cost of parts so compare with the situation that each line head is provided with seal member respectively.In addition, for supporting mass of the present invention carries a plurality of line heads, should have to a certain degree intensity as prerequisite, therefore compare with the situation of using common thin hermetic sealing substrate, sealing intensity is improved.

In the present invention, also can be following structure, promptly on the side of described supporting mass, be provided with recess, with airtight state sealing (jar sealing) described EL element is arranged in the described recess that between described supporting mass and described line head, is sealed.

Jar hermetically-sealed construction like this is applicable to usually as the EL device that shows that purposes is used.Because such EL matching requirements slimming, so also to require for the substrate (glass substrate) of jar sealing usefulness be the substrate of thin thickness.It is difficult generally forming on thin like this substrate and digging structure, and processing cost is also high.Yet, but there is not such restriction for the line head that uses as exposure device, supporting mass also can use thick parts.And, because a plurality of line heads of carrying, so, need have thickness to a certain degree in order to obtain intensity.Supporting mass with such thickness is compared with the thin substrate of jar sealing usefulness, and intensity height and handling ease so compare with common situation, can be made with low cost.In addition, in the line head module of invention, obtain structure owing to have, so do not require the transparency for supporting mass self from the light of line head from the opposite side of supporting mass.Therefore, more cheap metallic parts can be used, manufacturing cost can be further reduced under this kind situation as supporting mass.

Also can be: described line head module also possesses the adhesive linkage of bonding described line head and described supporting mass, covers described EL element by described adhesive linkage and described supporting mass.At this moment, do not dig structure owing to do not need to form, so can make with lower cost.

Also can be following structure, promptly on described a plurality of line heads, be respectively arranged with the optical imaging system that is used to make from the photoimaging of described light-emitting component.At this moment, make light imaging on photosensitive drum body of penetrating from each EL element more well

In addition, the invention provides a kind of exposure device, it possesses: described line head module of the present invention; And the photosensitive drum body that is exposed by light from the light-emitting component that described line head module had.And the invention provides the imaging device that possesses described exposure device as exposure mechanism.

According to this structure, can provide and to carry out at a high speed and the many imaging devices of typewriting number.

In addition, described line head module also possesses:

Stream, it is arranged on the inside of described supporting mass, and via described supporting mass with described line head hot tie-in;

Heat eliminating medium, it circulates in described stream, thereby cools off described supporting mass.Described supporting mass preferably is made of the high metal material of pyroconductivity of SUS, aluminium, brass etc.

According to this structure,, can cool off line head effectively by the effect of the heat eliminating medium that in supporting mass, circulates.Therefore, the durability of light-emitting component is improved, the many imaging devices of number of can realizing typewriting.

Also can control the circulation of described heat eliminating medium according to the driving situation of described line head.For example, can with the driving of line head/stop the circulation of ON/OFF heat eliminating medium linkedly, or come Control Circulation speed according to the superheat state (temperature in the temperature of light-emitting component, fluorescent lifetime, luminosity, the exposure device etc.) of line head.

According to such structure, make that the output of line head is stable, and obtain good typewriting quality.

Also can constitute: described supporting mass has the turning axle with the rotating shaft parallel of described photosensitive drum body, on the side face of described supporting mass, be provided with a plurality of described line heads, by with the described rotation that rotates to be the described supporting mass at center, switch described a plurality of line head with respect to described photosensitive drum body.

According to such structure,,, can carry out at a high speed and the typewriting of high light quantity so can prolong the life-span of line head owing to can distribute a plurality of line heads to a photosensitive drum body.In addition, owing to carry out the switching of line head by the rotation of supporting mass, the compactness so the structure of line head module self becomes can make the exposure device miniaturization, and then make with the imaging device miniaturization of this exposure device as exposure mechanism.

Also can be: described line head module also possesses pipe, and it is used to make described heat eliminating medium to flow into or flows out described stream.As the material of pipe, be fit to use flexible good and resin, for example teflon (Teflon) (registered trademark) resin etc. with certain intensity.

According to this structure, even the situation of supporting mass rotation, owing to pipe along with this rotation produces distortion, so in the process of circulation of heat eliminating medium, can not produce obstacle.

Also can be following structure, on described a plurality of line heads, be respectively arranged with the optical imaging system that is used to make from the photoimaging of described light-emitting component.

According to this structure, from the light effect imaging on photosensitive drum body better of each light-emitting component ejaculation.

Described light-emitting component also can be an electroluminescent cell (EL element).

Though it is low that EL element and LED etc. compare brightness (light quantity), in the present invention, use a plurality of line heads by switching ground, therefore state that can the long term maintenance high brightness possesses high practicality fully.In addition, as EL element, preferably use especially and can do the precision of luminous electricity than the higher organic EL that gets.

In addition, the invention provides a kind of exposure device, it possesses: described line head module of the present invention; And the photosensitive drum body that is exposed by light from the light-emitting component that described line head module had.And the invention provides the imaging device that possesses described exposure device as exposure mechanism.

According to this structure, can provide and to carry out at a high speed and the many imaging devices of typewriting number.

Description of drawings

Fig. 1 represents the mode chart of summary structure of first embodiment of exposure device of the present invention.

Fig. 2 A is the stereographic map of line head module, and Fig. 2 B is the sectional view of this line head module.

Fig. 3 A is the stereographic map of other structures of expression line head module, and Fig. 3 B is the sectional view of this line head module.

Fig. 4 is the figure that line head has been represented on pattern ground.

Fig. 5 is the stereographic map of SL array.

Fig. 6 A is the major part side cross-sectional view of line head, and Fig. 6 B is the mode chart of above-mentioned line head.

Fig. 7 is the summary structural drawing of first embodiment of expression imaging device of the present invention.

Fig. 8 is the summary structural drawing of second embodiment of expression imaging device of the present invention.

Fig. 9 A is the stereographic map of the line head module of other embodiments, Fig. 9 B be this line head module sectional view.

Figure 10 A is the stereographic map of other structures of expression line head module, and Figure 10 B is the sectional view of this line head module.

Figure 11 is the summary structural drawing of the 3rd embodiment of expression imaging device of the present invention.

Figure 12 is the summary structural drawing of the 4th embodiment of expression imaging device of the present invention.

Figure 13 A is the stereographic map of the line head module of other embodiments, and Figure 13 B is the sectional view of this line head module.

Figure 14 is the amplification sectional view of Figure 13 B.

Figure 15 is other a amplification sectional view of Figure 13 B.

Figure 16 is the perspective cross-sectional slice of the 5th embodiment of expression imaging device of the present invention.

Figure 17 is the summary structural drawing of the 6th embodiment of expression imaging device of the present invention.

Figure 18 A is the stereographic map of the line head module of other embodiments, and Figure 18 B is the sectional view of this line head module.

Figure 19 is the mode chart of the cooling body of expression line head module.

Figure 20 is the summary structural drawing of the 7th embodiment of expression imaging device of the present invention.

Figure 21 is the summary structural drawing of the 8th embodiment of expression imaging device of the present invention.

Embodiment

Below, with reference to accompanying drawing embodiments of the present invention are described.In addition, in each accompanying drawing of reference, in order to observe accompanying drawing easily, the size of each textural element of appropriate change waits to be represented below.

(exposure device)

At first exposure device of the present invention is described.

Fig. 1 is the figure of first embodiment of expression exposure device of the present invention, the symbol 100 expression exposure devices among Fig. 1.This exposure device 100 is the devices that are used as exposure mechanism in imaging device described later, and its structure is for possessing: line head 1; Make lens arra (optical imaging system) 31 from the photoimaging of this line head 1; The photosensitive drum body (photoreceptor) 9 that is exposed owing to the light that sees through said lens array 31 from above-mentioned line head 1.

(line head module)

Fig. 2 A and Fig. 2 B are the figure of expression line head module 101 summary structures, and Fig. 2 A is its stereographic map, and Fig. 2 B is its sectional view.

Shown in Fig. 2 A and Fig. 2 B, the structure of line head module 101 is for to possess: the line head 1 of a plurality of light-emitting components 3 of proper alignment configuration; Lens arra 31, its proper alignment has disposed the lens element that makes from the photoimaging of line head 1; The supporting mass 10 of supporting line head 1.

In Fig. 2 A and Fig. 2 B, supporting mass 10 is constituted as tabular body, is provided with along the turning axle 10a that extends with the direction of its main surface parallel in the central authorities of supporting mass 10.Turning axle 10a is connected with control gear 110, by the control signal from this control gear 110, controls its rotation.A plurality of side faces of the Zhou Fangxiang of supporting mass 10 configuration, being to be provided with line head 1 respectively on the surface of supporting mass 10 and the back side, is the rotation at center by supporting mass 10 with turning axle 10a, switches these 2 line heads 1.In addition, each line head 1 is corresponding to its switching, and driving also is switched, and during selecting a line head 1, the driving of another line head 1 stops.

The switching of line head 1 for example basis is carried out from the reduction of the light quantity of the light-emitting component ejaculation of line head 1 outfit.When the light quantity of light-emitting component 3 is inadequate situation (near the situation in life-span) with respect to the exposure of photosensitive drum body 9,, can use other line head 1 by being 180 ° of swivel bearing bodies 10 of basic point with turning axle 10a.Can be by the reduction of Direct-detection Optical amounts such as sensor, also can judge the reduction of light quantity based on typewriting condition (light quantity, print speed printing speed etc.) or typewriting number.Preferably automatically carry out the switching of line head 1 according to the reduction of light quantity.For example, under a speed in the line head 1, can carry out under the situation of 200,000 typewritings at 20ppm, can be following structure, promptly, if counting reaches 200,000 typewriting numbers, then control gear 110 carries out program design, makes supporting mass 10 around turning axle 10a Rotate 180 °, can use new line head 1.By this structure,, can be the specification of 400,000 typewriting number as imaging device.

Fig. 3 A and Fig. 3 B are the figure of other modes of expression line head module 101, are and Fig. 2 A and the corresponding figure of Fig. 2 B.

In the line head module 101 of Fig. 3 A and Fig. 3 B, supporting mass 10 is constituted as prism, and its cross section is a square.Central authorities at supporting mass 10 are provided with the turning axle 10a parallel with the turning axle 9a of photosensitive drum body 9.Turning axle 10a is connected with control gear 110, by the control signal from this control gear 110, controls its rotation.At a plurality of side faces of the Zhou Fangxiang of supporting mass 10 configuration, be to be respectively arranged with line head 1 on 4 sides of supporting mass 10.And, be the center rotation by supporting mass 10 with turning axle 10a, switch these line heads 1.By being the per 90 ° of ground swivel bearing bodies 10 of basic point with turning axle 10a, carry out the switching of line head 1.In addition, these a plurality of line heads 1 are according to its switching, and driving also is switched, and during selecting specific line head 1, the driving of other line head 1 stops.In this line head module 101, calculate the situation of the number that can typewrite under with the condition identical with first precondition, become the specification that can carry out 800,000 typewriting numbers with simple calculating.

In addition, in Fig. 3 A and Fig. 3 B, be provided with line head 1 in 4 sides of supporting mass 10 on all, but not necessarily line head 1 need be set on all sides, the structure of line head 1 also only is set on 2 in 4 sides or 3 sides.In addition, as supporting mass 10, also can use 4 prisms multiedge cylinder in addition, for example tri-prismoid, pentagonal prism body, hexagonal prism etc. can be provided with line head 1 on the side more than at least 2 of these multiedge cylinders.And, as supporting mass 10, also can use right cylinder or oval cylinder etc., have the structure of curved surface in the part of its side face.In the right cylinder of these right cylinders or multiedge cylinder etc., in order to make lens arra 31 commonization, preferably its cross sectional shape is regular polygon or circular shape.And, among Fig. 3 A and Fig. 3 B, adopted the structure of supporting mass 10 for the solid column in centre, replace this structure, also can adopt the structure of supporting mass 10 for the column of hollow.

In addition, in the present embodiment, a plurality of line heads 1 that are provided with on same supporting mass 10 are used as spare unit mutually.For this reason, preferably the identical each other specification of these line heads 1 still if making these is different specifications, makes their different each other, and can obtain singly is not the line head with some complementary relationships 1 of spare unit.

In the present embodiment, as lens arra 31, use SLA (Selfoc Lense Array: No. the 1634249th, Japan's registered trademark) especially as straight positive equimultiple imaging system.Each of the line head 1 that the side of supporting mass 10 is provided with is provided with lens arra 31.Under this lens arra 31 and state that line head 1 is aimed at, one keeps lens arra 31 and line head 1.In such structure, line head module 101 makes light 1 luminous by selecteed specific line head, that penetrate, is directly just waiting doubly imaging on the surface as the photosensitive drum body 9 of imaging surface.

(line head)

Fig. 4 is the figure of pattern ground expression line head 1.This line head 1 is integrally formed on the device substrate 2 of elongated rectangular: proper alignment disposes columns of light elements (luminous component row) 3A that a plurality of light-emitting components 3 form; The driving element group who constitutes by the driving element 4 that light-emitting component 3 is driven; Control the control circuit group 5 of the driving of these driving elements 4 (driving element group).Though use organic EL as light-emitting component 3, replace organic EL, also can use inorganic EL element or light emitting diode (LED).Line head 1 as shown in Figure 1, it is relative with photosensitive drum body 9 that the face of its light emitting side is configured to, at this moment, the column direction of above-mentioned columns of light elements 3A (the proper alignment direction of light-emitting component) is configured to parallel with the turning axle 9a of photosensitive drum body 9.

In addition, in Fig. 4, formed columns of light elements 3A, also can for example organic EL 3 be arranged in 2 row and they be formed staggered though show machine EL element 3 by 1.At this moment, the spacing of the organic EL 3 on the length direction of line head 1 can be reduced, thereby the exploring degree of imaging device described later can be improved.

Organic EL 3 is the elements that have organic luminous layer between pair of electrodes at least, and is luminous by providing electric current to carry out from this pair of electrodes to luminescent layer.Connect power lead 8 on the electrode in organic EL 3, on another electrode, connect power lead 7 by driving element 4.This driving element 4 is made of thin film transistor (TFT) or thin film diode conversion elements such as (TFD).In driving element 4, adopt the situation of TFT, connect power lead 7, on gate electrode, connect control circuit group 5 in its source region.Then, by the action of control circuit group 5 control driving component 4, by the energising of driving element 4 controls to organic EL 3.

In addition, the detailed structure of organic EL 3 and driving element 4 is narrated in the back.

(SLA)

Fig. 5 is the stereographic map as the SLA of lens arra 31.This lens arra (SLA) the 31st, with staggered arrangement (configuration) device of 2 row SL element 31a.And, fill the silicone resin 32 of black in the gap with the individual SL element 31a of staggered configuration, and around it, disposed framework 34.

Above-mentioned SL element 31a be refractive index from the axle center the bar-shaped lens to peripheral distribution.Therefore, portion is tortuous and advance with certain cycle within it for the light that incides SL element 31a.Thereby, the SL element 31a of straight so positive equimultiple imaging, can overlapping adjacent SL element 31a between imaging, can obtain large-scale image.Therefore, SLA31 shown in Figure 5 can precision makes the photoimaging from line head 1 integral body preferably.

(organic EL and driving element)

Below, the detailed structure of organic EL in the parallel type printhead and driving element etc. describes with reference to Fig. 6 A and Fig. 6 B.

The light that is sent by luminescent layer 60 penetrates from pixel electrode 23 1 sides, the actinomorphic situation in so-called bottom, owing to be the structure of the light that obtains sending from device substrate 2 one sides, so adopt transparent or semitransparent material as device substrate 2.For example, can enumerate glass, quartz, resin (plastics, plastic sheeting) etc., especially suitably use glass substrate.

In addition, the actinomorphic situation in so-called top that the light that is sent by luminescent layer 60 penetrates from negative electrode (opposite electrode) 50 1 sides, owing to be to be the structure of the hermetic sealing substrate one side light that obtains sending from these device substrate 2 opposite sides, so can transparency carrier and any of opaque substrate.As opaque substrate, for example can enumerate the material of the insulation processing of on sheet metals such as potteries such as aluminium oxide, stainless steel, having implemented surface oxidation etc., also have thermosetting resin, thermoplastic resin etc. in addition.

In the present embodiment, employing be the bottom radial pattern, therefore, use transparent glass as device substrate 2.

Formed circuit part 11 on device substrate 2, described circuit part 11 comprises the driving TFT123 (driving element 4) etc. that is connected with pixel electrode 23, is provided with organic EL 3 on TFT123.Luminescent layer 60, negative electrode 50 that organic EL 3 was constituted as and has formed the pixel electrode 23 that plays a role as negative electrode in order, injected/transport hole transporting layer 70 from the hole of this pixel electrode 23, is made of organic EL material.

Here, use TFT123 (driving element 4) if use the pattern diagram corresponding with Fig. 4 to be shown with machine EL element 3 and to drive, it is described then to become Fig. 6 B.In Fig. 6 B, power lead 7 is connected with the source/drain electrode of driving element 4, and power lead 8 is connected with the negative electrode 50 of organic EL 3.

And, in such structure, organic EL 3 as shown in Figure 6A, by from hole transporting layer 70 injected holes and from the electronics of negative electrode 50 in luminescent layer 60 combinations, carry out luminous.

Pixel electrode 23 as negative electrode plays a role in the actinomorphic present embodiment in conduct bottom, forms by transparent conductive material, particularly, suitably uses ITO.

As the material that forms hole transporting layer 70, especially be fit to use the dispersion liquid of 3,4-poly-ethylidene dioxy base thiophene/polystyrolsulfon acid (PEDOT/PSS), promptly, be fit to use 3,4-poly-ethylidene dioxy base thiophene is dispersed in the polystyrolsulfon acid as spreading agent, make it be dispersed in the dispersion liquid that obtains in the water again.

In addition, as the material that forms hole transporting layer 70, be not to be defined in above-mentioned material, also can use various materials.Can use for example polystyrene, polypyrrole, polyaniline, polyacetylene or derivatives thereof etc. are distributed to suitable spreading agent, in for example above-mentioned polystyrolsulfon acid and the material that obtains.

As the material that is used to form luminescent layer 60, use can be sent the known luminescent material of fluorescence or phosphorescence.In addition, in the present embodiment, adopt for example luminous wave band and red corresponding luminescent layer, certainly can adopt luminous wave band and green or blue corresponding luminescent layer.At this moment, employed photoreceptor adopts the photoreceptor that has sensitivity at its light-emitting zone.

As the material that forms luminescent layer 60, particularly, can suitably use the polysilane system etc. of poly-fluorene derivative (PF), polyparaphenylene's ethenylidene derivant (PPV), polyphenylene derivatives (PP), polyparaphenylene's derivant (PPP), Polyvinyl carbazole (PVK), polythiofuran derivative, polymethyl-benzene base silane (PMPS) etc.In addition, also can be in these macromolecular materials, macromolecule based materials such as doping perylene base system, coumarin series, rhodamine system, or low molecular material such as rubrene, perylene, 9,10-diphenylanthrancene, tetraphenylbutadiene, Nile red, coumarin 6, quinacridine uses.

Negative electrode 50 is to cover above-mentioned luminescent layer 60 and form, and for example forms the Ca about thickness 20nm, forms the Al about thickness 200nm thereon and becomes the electrode of stepped construction, and Al also brings into play the effect as the reflection horizon.

In addition, on this negative electrode 50, paste hermetic sealing substrate (not shown) by adhesive linkage.

In addition, below such organic EL 3, be provided with aforesaid circuit part 11.This circuit part 11 is formed on the device substrate 2.That is, on the surface of device substrate 2, be formed with SiO ₂Substrate protective seam 281 for main body is formed with silicon layer 241 thereon.On the surface of this silicon layer 241, be formed with SiO ₂Based on and/or the gate insulator 282 of SiN.

In addition, in above-mentioned silicon layer 241, form channel region 241a across gate insulator 282 equitant zones with gate electrode 242.In addition, this gate electrode 242 is parts of not shown sweep trace.On the other hand, covering silicon layer 241 and having formed on the surface of gate insulator 282 of gate electrode 242, be formed with SiO ₂ First interlayer dielectric 283 for main body.

In addition, in silicon layer 241, source electrode one side at channel region 241a is provided with low concentration source region 241b and high concentration source region 241S, on the other hand, drain electrode one side at channel region 241a is provided with low concentration drain region 241c and high concentration drain region 241D, becomes so-called LDD (Lighty DopedDrain) structure.In the middle of these, high concentration source region 241S links to each other with source electrode 243 via running through the connecting hole 243a of gate insulator 282 with 283 perforates of first interlayer insulating film.This source electrode 243 is constituted as the part of power lead (not shown).On the other hand, high concentration drain region 241D links to each other with the drain electrode 244 of source electrode 243 with one deck via the connecting hole 244a that runs through gate insulator 282 and 283 perforates of first interlayer insulating film.

Formed on the upper strata of first interlayer insulating film 283 of source electrode 243 and drain electrode 244, be formed with based on for example planarization film 284 of the resinous principle of acrylic acid system.This planarization film 284 is to be formed by thermotolerance insulative resins such as acrylic acid system or polyimide system etc., is to drive the known film that forms with the concavo-convex of the surface of TFT123 (driving element 4) or source electrode 243, drain electrode 244 etc. in order to eliminate.

And the pixel electrode 23 that is made of ITO etc. is formed on the surface of this planarization film 284, simultaneously, links to each other with drain electrode 244 via being arranged on the connecting hole 23a on this planarization film 284.That is, pixel electrode 23 is connected with the high concentration drain region 241D of silicon layer 241 via drain electrode 244.

On the surface of the planarization film 284 that has formed pixel electrode 23, be formed with pixel electrode 23, inorganic next door 25, and, on inorganic next door 25, be formed with organic next door 221.Then, on pixel electrode 23, the inside of the opening 221a that on the peristome 25a that forms on the inorganic next door 25 and organic next door 221, forms, promptly, on the pixel region, stack gradually above-mentioned hole transporting layer 70 and luminescent layer 60, form functional layer thus from pixel electrode 23 1 sides.

In addition, in this example, as the element that drives EL element, enumerated the example of the driving elements such as TFT 4 of on device substrate 2, having packed into, but the driving element 4 of also can on device substrate 2, not packing into, and driving element 4 is external, particularly, at the terminal area CGO of EL element substrate assembling driver IC, or on the EL element substrate, assemble flexible circuit board, assembled driver IC on the described flexible circuit board.

The line head module 101 that constitutes by aforesaid way as shown in Figure 1, with rayed on as the photosensitive drum body 9 that is exposed portion and imaging in the above, to expose.At this moment, line head 1 and lens arra 31 under the state of mutually aiming at and be retained one, so in use, as long as line head module 101 is aimed at photosensitive drum body 9.Therefore, the exposure device 100 that possesses this line head module 101, compare with the situation of lens arra 31 with other preparation line head 1, become easily at the alignment function of photosensitive drum body 9, thereby can prevent reliably that the exposure that causes because of misregistration is irregular.

Such as previously discussed, in the present embodiment, distributed a plurality of line heads 1 (that is columns of light elements 3A) for 1 photosensitive drum body 9.For this reason, can prolong life-span of line head, can carry out at a high speed and the typewriting of high light quantity as module.In addition, owing to carry out the switching of line head 1 by the rotation of supporting mass 10, so it is compact that the structure of line head module 101 self becomes, exposure device 100 even this exposure device 100 become possibility as the miniaturization of the imaging device of the imaging device of exposure mechanism.

Below, to possessing exposure device of the present invention and its imaging device as exposure mechanism being described.

(imaging device of series system)

Fig. 7 is the figure of first embodiment of expression imaging device of the present invention, and the symbol 80 among Fig. 7 is imaging devices of series system.This imaging device 80 is series systems, on 4 photosensitive drum body 41K, 41C by organic EL array line head 101K, 101C, 101M, 101Y being configured in corresponding same spline structure respectively, 41M, the 41Y, and forms exposure device.

This imaging device 80 possesses driven roller 91, driven voller 92 and jockey pulley 93, opens on these each rollers and establishes intermediate transfer belt 90, and drive intermediate transfer belt 90 along the direction of arrow among Fig. 7 (counterclockwise) circulation.With respect to this vertical intermediate transfer belt 90, with predetermined distance configuration photosensitive drum body 41K, 41C, 41M, 41Y.The outer peripheral face of these photosensitive drum bodies 41K, 41C, 41M, 41Y is the photographic layer as image carrier.

Here, K, the C in the above-mentioned symbol, M, Y are meant that respectively black, dark green, magenta, yellow expression respectively are the photoreceptors of black, dark green, magenta, yellow usefulness.In addition, even also identical about other the meaning of these symbols of parts (K, C, M, Y).The driving of photosensitive drum body 41K, 41C, 41M, 41Y and intermediate transfer belt 90 is synchronous, and the direction of arrow in Fig. 7 (clockwise direction) goes up rotation and drives.

Around each photosensitive drum body 41 (K, C, M, Y), be provided with: the charged charged mechanism (corona charging device) 42 (K, C, M, Y) of outer peripheral face that similarly makes photosensitive drum body 41 (K, C, M, Y) respectively; The organic EL array line head 101 (K, C, M, Y) that makes the rotation of outer peripheral face similarly charged and photosensitive drum body 41 (K, C, M, Y) carry out line scanning synchronously, in order by this charged mechanism 42 (K, C, M, Y).

Here, organic EL array line head 101 (K, C, M, Y) as mentioned above, by printhead housing etc., with state that SL array (not shown) is aimed at mutually under, be retained one, and use as line head module.

In addition, be provided with developing apparatus 44 (K, C, M, Y), primary transfer roller 45 (K, C, M, Y) and cleaning device 46 (K, C, M, Y), described developing apparatus 44 (K, C, M, Y) is given the electrostatic latent image that is formed by this organic EL array line head 101 (K, C, M, Y) (line head module) becomes visual picture (toning picture) as the toner of developer; Described primary transfer roller 45 (K, C, M, Y) will be by the toning picture of this developing apparatus 44 (K, C, M, Y) development, on the intermediate transfer belt 90 that is transferred in order as the primary transfer object as transfer means; Described cleaning device 46 (K, C, M, Y) is removed the toner that remains in the surface of photosensitive drum body 41 (K, C, M, Y) after the transfer printing as wiper mechanism.

Here, the array direction separately of each organic EL array line head 101 (K, C, M, Y) is by the bus setting along photosensitive drum body 41 (K, C, M, Y).And the luminous energy peak wavelength of each organic EL array line head 101 (K, C, M, Y) is configured to roughly consistent with the sensitivity peaks wavelength of photosensitive drum body 41 (K, C, M, Y).

Developing apparatus 44 (K, C, M, Y) uses a for example non magnetic composition toner as developer, with this component developer by donor rollers for example to the developer roll conveyance, with the thickness of restriction scraper restriction attached to the developer on developer roll surface, by this developer roll is contacted with photosensitive drum body 41 (K, C, M, Y) or with developer roll by being pressed on the photosensitive drum body 41 (K, C, M, Y), potential level according to photosensitive drum body 41 (K, C, M, Y) adheres to developer, is the toning picture and develop.

Monotone colour by 4 such looks forms black that station forms, dark green, magenta, yellow each toning picture, by being added to the primary transfer bias voltage (bias) on the primary transfer roller 45 (K, C, M, Y), in order by primary transfer to intermediate transfer belt 90.Then, overlapping in order and become panchromatic toning picture on intermediate transfer belt 90, this toning picture at secondary transfer printing on the secondary transfer roller 66 to the recording medium P of paper etc., further by as the fixing roller of photographic fixing portion to 61, by photographic fixing on recording medium P, by exit roller to 62, be discharged to row paper carrier 68 that device top form thereafter.

In addition, symbol 63 among Fig. 7 is stacked paper carriers of giving that keeping many recording medium P, the 64th, from giving paper carrier 63 paper-feed roll of conveying recording medium P one by one, the 65th, regulation is right to the control roll in the moment of the supply recording medium P of secondary transfer printing portion of secondary transfer roller 66, the 66th, between intermediate transfer belt 90, form the secondary transfer roller as secondary transfer printing mechanism of secondary transfer printing portion, the 67th, the cleaning scraper that the toner that remains in the surface of intermediate transfer belt 90 behind secondary transfer printing is removed as wiper mechanism.

(imaging devices of 4 recycle design)

Below, second embodiment of imaging device of the present invention is described.Fig. 8 is the longitudinal section side view of the imaging device of 4 recycle design.In Fig. 8, on imaging device 160,, be provided with the developing apparatus 161 that constitutes with rotation mode, write the warm-up mill 172 of mechanism 167, intermediate transfer belt 169, sheet carrying road 174, fuser and give paper carrier 178 as the photosensitive drum body 165 that plays a role as supporting body, the picture that constitutes by above-mentioned line head module as the main composition parts.

It is that the center rotates along the arrow A direction with axle 161b that developing apparatus 161 is constituted as development rotating disk 161a.The inside of development rotating disk 161a is divided into 4 parts, and is provided with the image-generating unit of 4 looks that are yellow (Y), dark green (c), magenta (M), black (K) respectively.162a～162d is configured in above-mentioned each image-generating unit of 4 looks, and the image forming roller 163a～163b that rotates along the arrow B direction is the toner supplying roller that rotates along the arrow C direction.In addition, 164a～164d is the restriction scraper that toner is limited in the thickness of regulation.

Symbol 165 among Fig. 8 is as mentioned above as the photosensitive drum body that plays a role as supporting body, the 166th, and the primary transfer parts, the 168th, charged device, the 167th, picture writes mechanism, is made of above-mentioned line head module.And, write mechanism's (line head module) 167 by photosensitive drum body 165 and picture and constitute exposure device of the present invention.

Photosensitive drum body 165 by omitted illustrated CD-ROM drive motor, for example step motor is driven and to rotating with the rightabout arrow D of developer roll 162a direction.In addition, constitute line head module that picture writes mechanism 167 is configured to carry out contraposition (aligning optical axis) between itself and photosensitive drum body 165 state.

Intermediate transfer belt 169 is erected between driven roller 170a and the driven voller 170b.Driven roller 170a is connected with the CD-ROM drive motor of above-mentioned photosensitive drum body 165, to intermediate transfer belt 169 transferring power.That is, by the driving of this CD-ROM drive motor, the driven roller 170a of intermediate transfer belt 169 is to rotating with photosensitive drum body 165 rightabout arrow E directions.

On sheet carrying road 174, be provided with a plurality of carrying rollers and exit roller to 176 etc., with the conveyance paper.The image of the single face that intermediate transfer belt 169 is carried (toning picture) is transferred on the single face of paper in the position of secondary transfer roller 171.Secondary transfer roller 171 is by clutch coupling and intermediate transfer belt 169 butts, and when clutch coupling was in connection status, secondary transfer roller 171 and intermediate transfer belt 169 butts were with this transferred image on paper.

As mentioned above, then by the fuser with fixing heater H to transfer printing the paper of image carry out photographic fixing and handle.On fuser, be provided with warm-up mill 172 and backer roll 173.The photographic fixing sheet processed is drawn in 176 by exit roller, advances along arrow F direction.If exit roller rotates from state round about to 176, then paper is reverse, advances with carrying channel 175 upper edge arrow G directions at duplex printing.The 177th, electric fitting case, the 178th, accommodate the paper carrier of giving of paper, 179 are arranged on the control roll to the outlet of paper carrier 178.

On the sheet carrying road,, for example use the brushless motor of low speed as the CD-ROM drive motor that drives carrying roller.In addition, about intermediate transfer belt 169,, use step motor owing to need carry out the correction etc. of color fringe.By control described each motor from the signal that has omitted illustrated control gear.

Under state shown in Figure 8, on photosensitive drum body 165, form the electrostatic latent image of yellow (Y), applying high voltage on developer roll 162a, thus on photosensitive drum body 165, form yellow image.The yellow rear side and the image of face side all are during by intermediate transfer belt 169 carryings, and development rotating disk 161a revolves along the arrow A direction and turn 90 degrees.

Intermediate transfer belt is got back to the position of photosensitive drum body 165 after 169 1 weeks of rotation.Then, form 2 the image of dark green (C) on photosensitive drum body 165, this doubling of the image is on by the image of the yellow of intermediate transfer belt 169 carryings and carried.Below same as described above, repeatedly: development rotating disk 161a revolves and turn 90 degrees, behind intermediate transfer belt 169 load images rotation 1 week processing.

In order to carry the coloured image of 4 looks, intermediate transfer belt 169 rotated for 4 weeks, further controlled position of rotation thereafter, and the position in secondary transfer roller 171 transfers images on the paper.The paper of conveyance from sending out for paper carrier 178 is transferred to above-mentioned coloured image on the single face of paper in the position of secondary transfer roller 171 on carrying channel 174.In the single face transfer printing image paper as mentioned above, overturn under at exit roller, and standby on the conveyance path to 176 effect.Thereafter, paper the suitable moment by the position of conveyance to secondary transfer roller 171, the described coloured image of transfer printing on another side.On shell 180, be provided with extraction fan 181.

In above-mentioned Fig. 7, imaging device 80,160 shown in Figure 8, possesses exposure device of the present invention shown in Figure 1 as exposure mechanism.

Therefore,, as mentioned above, the sufficient life-span can be guaranteed, and typewriting at a high speed can be carried out by the switching of line head for these imaging devices 80,160.

Other embodiments to exposure device of the present invention describe.Basic mechanism is identical with exposure device shown in Figure 1, omits its explanation.

(line head module)

Fig. 9 A and Fig. 9 B are the figure of summary structure of the line head module 1101 of expression present embodiment, and Fig. 9 A is its stereographic map, and Fig. 9 B is its sectional view.

Shown in Fig. 9 A and Fig. 9 B, line head module 1101 is constituted as, and possesses: proper alignment has disposed the line head 1001 (1001A, 1001B) of a plurality of light-emitting components 1003; Proper alignment has disposed the lens arra 1031 that makes from the lens element of the photoimaging of line head 1001; And the supporting mass 1010 of supporting line head 1001.

In Fig. 9 A and Fig. 9 B, supporting mass 1010 is constituted as tabular body, is provided with along the turning axle 1010a that extends with the direction of the main surface parallel of supporting mass 1010 in the central authorities of supporting mass 1010.Turning axle 1010a is connected with control gear 1110, by the control signal from this control gear 1110, controls its rotation.A plurality of side faces in the Zhou Fangxiang of this supporting mass 1010 configuration, the surface and the back side that are supporting mass 1010 are respectively equipped with line head 1001 (1001A or 1001B), by being the rotation of the supporting mass 1010 at center, switch described 2 line head 1001A, 1001B with turning axle 1010a.In addition, line head 1001A, 1001B should switch corresponding to it, drove also to be switched, and during selecting a line head, the driving of another line head stops.

The specification of line head 1001A, 1001B is different, can change these line heads 1001A, 1001B according to user's requirement.For example, line head 1001A (precision low, at a high speed) is to obtain the specification that imaging area is the output speed of 100 μ m (precision is low), 40ppm (at a high speed), and line head 1001B can obtain the specification that imaging area is the output speed of 50 μ m (precision height), 20ppm (low speed).When the output of lines that do not require precision etc., use line head 1001A, carry out output at a high speed.On the other hand, when photo etc. required the output of high precision, supporting mass 1010 was a basic point Rotate 180 degree with turning axle 1010a under the control of control gear 1110, and switches to line head 1001B.Thus, though typing speed slow a little a bit can carry out the high output of quality.Can carry out the switching of this line head 1001 automatically by control gear 1110.

Figure 10 A and Figure 10 B are the figure of other embodiments of expression line head module 1101, are and Fig. 9 A and the corresponding figure of Fig. 9 B.

In the line head module 1101 of Figure 10 A and Figure 10 B, it is foursquare prism that supporting mass 1010 is constituted as its cross section.In the central authorities of supporting mass 1010, be provided with the turning axle 1010a parallel with the turning axle 1009a of photosensitive drum body 1009.Turning axle 1010a is connected with control gear 1110, and by the control signal from this control gear 1110, controls its rotation.At a plurality of side faces of the Zhou Fangxiang of supporting mass 1010 configuration, promptly on 4 of supporting mass 1010 sides, be respectively equipped with line head 1001 (1001C or 1001D).And, switch these line heads 1001C, 1001D by being the rotation of the supporting mass 1010 at center with turning axle 1010a.By being that basic point makes supporting mass 1010 rotate in the mode of per 90 degree with turning axle 1010a, carry out the switching of line head 1001.In addition, these line heads 1001C, 1001D switch corresponding to this, drive also to be switched, and during selecting specific line head, the driving of another line head stops.

The specification of line head 1001C, 1001D is different, can change these line heads 1001C, 1001D according to user's requirement.For example, line head 1001C (low, the high light quantity of precision/general color) is can be with at a high speed to the monochromatic picture of general frequent use or do not require the specification (for example imaging area 100 μ m, output speed 40ppm) that the precision of colored lines, picture etc. is handled than higher output, make deterioration rapidly owing to frequency of utilization is high, so equipped 3.The switching of these line heads 1001C is for example carried out according to the reduction of the light quantity of the light-emitting component 1003 of outfit on the line head 1001C.The light quantity of light-emitting component 1003 is to the inadequate situation of the exposure of photosensitive drum body 1009 (near the situation in life-span), and control gear 1110 is that basic point revolves supporting mass 1010 to turn 90 degrees with turning axle 1010a, thereby can use other line head 1001C.Can be by the reduction of Direct-detection Optical amounts such as sensor, also can judge the reduction of light quantity based on typewriting condition (light quantity, print speed printing speed etc.) or typewriting number.What wish is the switching of carrying out line head 1001C according to the reduction of light quantity automatically.

Line head 1001D (the high and low light quantity/photograph image of precision) is the corresponding specification of output of photo with demanding precision etc., (for example imaging area 50 μ m, output speed 20ppm), though typing speed has reduced, can obtain the high output of quality.Because this line head 1001D frequency of utilization is low, so only be equipped with one.

In addition, in Figure 10 A and Figure 10 B, on 4 sides of supporting mass 1010, all be provided with line head 1001, but also can be following structure, the situation of line head 1001 promptly not necessarily need be set on whole sides, only on 2 in 4 sides or 3 sides line head 1001 be set.In addition, as supporting mass 1010, also can adopt 4 prisms multiedge cylinder in addition, for example tri-prismoid, pentagonal prism body, hexagonal prism ... Deng, can on the side more than at least 2 of these multiedge cylinders, line head 1001 be set.And, as supporting mass 1010, also can adopt right cylinder or oval cylinder etc. on the part of its side face, to have the structure of curved surface.In the column of these multiedge cylinders or right cylinder etc., in order to make lens arra 1031 universalizations, hope be that its cross sectional shape is regular polygon or circle.And, in Figure 10 A and Figure 10 B,, replace this structure though adopted the structure of supporting mass 1010 for the solid column in centre, also can adopt the structure of supporting mass 1010 for the column of hollow.

In addition, in Figure 10 A and Figure 10 B, the ratio of line head 1001C and line head 1001D is 3:1, but this ratio might not be limited to 3:1.When the printer of orientating photo output usefulness as etc., also can improve the ratio of line head D.In addition, also can adopt 4 line heads that specification is different separately, adopt and to select all modes of the most suitable user's line head automatically.

And, in the present embodiment, enumerated precision, output light quantity, output speed as the specification of line head 1001, but specification of the present invention might not be defined in this.

In the lens arra 1031 of Shi Yonging, adopted the SL array equally, its explanation of Therefore, omited in the present embodiment with the employed lens arra 31 of first embodiment.

(line head)

The basic structure of the line head 1001 of present embodiment is identical with the structure of line head 1 shown in Figure 4, its explanation of Therefore, omited.

(organic EL and driving element)

The detailed structure of organic EL in the line head 1001 of present embodiment and driving element etc. is identical with the structure shown in Fig. 6 A and Fig. 6 B, its explanation of Therefore, omited.

As described above described, in the present embodiment, distributed a plurality of line heads 1001 (being columns of light elements 1003A) for 1 photosensitive drum body 1009.Therefore, can prolong the life-span of line head, can carry out at a high speed and the typewriting of high light quantity.In addition, owing to carry out the switching of line head 1001 by the rotation of supporting mass 1010, so it is compact that the structure of line head module 1101 self becomes, thereby can make exposure device 1100 miniaturizations, and then can make with of the imaging device miniaturization of this exposure device 1100 as exposure mechanism.And, owing on same supporting mass 1010, be provided with the different line head of a plurality of specifications,, can always be met the output of customer requirements so can switch them according to purposes.In addition, use line head 1001, can effectively apply flexibly each line head 1001, make the high standardization (high spec) of the output device of printer etc. simultaneously by switching ground.

Below, the imaging device that has the exposure device of above-mentioned embodiment as exposure mechanism is described.

(imaging device of series system)

Figure 11 is the figure of the 3rd embodiment of expression imaging device of the present invention, and the symbol 1080 among Figure 11 is imaging devices of series system.This imaging device 1080 has disposed organic EL array line head 1101K, 1101C, 1101M, the 1101Y of above-mentioned embodiment respectively on 4 photosensitive drum body 41K, 41C of the same spline structure of correspondence, 41M, 41Y, except constituting the point of exposure device, have the structure common with imaging device shown in Figure 7, the symbol identical to common part mark, and omit explanation.

(imaging devices of 4 recycle design)

Below, the 4th embodiment of imaging device of the present invention is described.Figure 12 is the longitudinal section side view of the imaging device 1160 of 4 recycle design.This imaging device 1160 has the structure common with imaging device shown in Figure 8 except writing the point that adopts the line head module 1101 of above-mentioned embodiment in the mechanism 1167 at picture, the symbol identical to common part mark, and omit explanation.

In above-mentioned Figure 11, imaging device 1080,1160 shown in Figure 12, possesses exposure device of the present invention shown in Figure 1 as exposure device.

Therefore,, as mentioned above,, the sufficient life-span can be guaranteed, and typewriting at a high speed can be carried out by the switching of line head for these imaging devices 1080,1160.

And, owing on 1 line head module, be provided with the different line head of a plurality of specifications,, make high standardization simultaneously so can effectively apply flexibly line head.

Other embodiments to exposure device of the present invention describe.Basic structure is identical with exposure device shown in Figure 1, its explanation of Therefore, omited.

(line head module)

Figure 13 A and Figure 13 B are the figure of the summary structure of expression line head module 2101, and Figure 13 A is its stereographic map, and Figure 13 B is its sectional view.

Shown in Figure 13 A and Figure 13 B, line head module 2101 is constituted as, and possesses: proper alignment has disposed the line head 2001 of a plurality of light-emitting components 3; Proper alignment has disposed the lens arra 2031 that makes from the lens element of the photoimaging of line head 2001; And the supporting mass 2010 of supporting line head 2001.

In Figure 13 A and Figure 13 B, it is foursquare prism that supporting mass 2010 is constituted as its cross section.In the central authorities of supporting mass 2010, be provided with the turning axle 2010a parallel with the turning axle 2009a of photosensitive drum body 2009.

Turning axle 2010a is connected with control gear 2110, and by the control signal from this control gear 2110, controls its rotation.At a plurality of side faces of the Zhou Fangxiang of this supporting mass 2010 configuration, promptly on 4 of supporting mass 2010 sides, be respectively equipped with line head 2001.And, switch these line heads 2001 by being the rotation of the supporting mass 2010 at center with turning axle 2010a.In addition, these line heads 2001 are corresponding to this switching, and driving also is switched, and during selecting specific line head 2001, the driving of other line head 2001 stops.

The switching of line head 2001 is for example carried out according to the reduction of the light quantity of the light-emitting component 2003 of outfit on the line head 2001.The light quantity of light-emitting component 2003 is to the inadequate situation of the exposure of photosensitive drum body 2009 (near the situation in life-span), control gear 2110 is that basic point makes supporting mass 2010 be rotated according to the mode of per 90 degree with turning axle 2010a, thereby can use other line head 2001.Can be by the reduction of Direct-detection Optical amounts such as sensor, also can judge the reduction of light quantity based on typewriting condition (light quantity, print speed printing speed etc.) or typewriting number.What wish is the switching of carrying out line head 2001 according to the reduction of light quantity automatically.For example, line head 2001 can have following structure, promptly when the speed of each line head 2001 is 20ppm, can typewrite 200,000 situation, if counting reaches 200,000 typewriting number, then control gear 2110 is automatically designed program, make supporting mass 2010 revolve and turn 90 degrees, can use new line head 2001 around turning axle 2010a.By this structure,, can become the specification of 800,000 typewriting numbers as imaging device.

Figure 14 is the mode chart that amplifies the cross section structure of expression line head module 2101.

As shown in figure 14, line head 2001 supports the face that has formed light-emitting component 2,003 one sides by supporting mass 2010, and is bonded on the supporting mass 2010 by be located at device substrate 2002 bonding agent 2040 on every side with ring-type.On 4 faces of supporting mass 2010,, contain light-emitting component 2003 in the D inside of this recess 2010 being provided with recess 2010D with position that the light-emitting component 2003 of line head 2001 is faced mutually.As hereinafter described, in the present embodiment, use EL element as light-emitting component 2003, supporting mass 2010 double as are the structure of the sealable tank (seal member) that is used to seal this EL element.In addition, in the present embodiment, because to a direction proper alignment configuration light-emitting component 2003, so recess 2010 also is formed corresponding with this columns of light elements and groove that have certain width and length.Groove 2010D is formed the size littler than the size of line head 2001, and constitutes confined space between line head 2001 and supporting mass 2010.And then, become in this confined space light-emitting component 2003 structure with airtight state sealed (jar sealing).In addition, be provided with the air-breathing material 2015 that absorbs water, oxygen etc. in the bottom surface of groove 2010D, can prevent that light-emitting component 2003 from worsening because of moisture etc.

Jar hermetically-sealed construction like this is applicable to usually as the EL device that shows that purposes is used.Because such EL matching requirements slimming, so also to require for the substrate (glass substrate) of jar sealing usefulness be the substrate of thin thickness.It is difficult generally forming on thin like this substrate and digging structure, and processing cost is also high.Yet, but there is not such restriction for the line head that uses as exposure device, supporting mass 2010 also can use thick parts.And, because a plurality of line heads 2001 of carrying, so, need have thickness to a certain degree in order to obtain intensity.Supporting mass 2010 with such thickness is compared with the thin substrate of jar sealing usefulness, and intensity height and handling ease so compare with common situation, can be made with low cost.

In addition, in the line head module 2101 of present embodiment, obtain structure owing to have, so there is not the requirement of the transparency for supporting mass self from the light of line head 2001 from the opposite side of supporting mass 2010.Therefore, more cheap metallic parts can be used, manufacturing cost can be further reduced under this kind situation as supporting mass 2010.

Figure 15 is the figure of other embodiments of expression line head module 2101, is the figure corresponding with Figure 14.

In the line head module 2101 of Figure 15, line head 2001 supports the face that has formed light-emitting component 2,003 one sides by supporting mass 2010, and is bonded in by adhesive linkage 2049 on the side of supporting mass 2010.And, by this adhesive linkage 2049 and supporting mass 2010 flat seal light-emitting components 2003.In this structure,,, can make originally with lower one-tenth so compare with the structure of Figure 14 owing to need on supporting mass 2010, not form groove.

In addition, in Figure 13 A to Figure 15, on 4 sides of supporting mass 2010, all be provided with line head 2001, but also to be following structure, line head 2001 promptly not necessarily is set on all sides, only on 2 in 4 sides or 3 sides line head 2001 is set.In addition, as supporting mass 2010, also can adopt 4 prisms multiedge cylinder in addition, for example tri-prismoid, pentagonal prism body, hexagonal prism ... Deng, can on the side more than at least 2 of these multiedge cylinders, line head 2001 be set.And, as supporting mass 2010, also can adopt right cylinder or oval cylinder etc. on the part of its side face, to have the structure of curved surface.In the column of these multiedge cylinders or right cylinder etc., in order to make lens arra 2031 universalizations, hope be that its cross sectional shape is regular polygon or circle.And, in Figure 14,, also can replace this structure though adopted the structure of supporting mass 2010 for the solid column in centre, adopting supporting mass 2010 is the structure of the column of hollow.

In addition, in the present embodiment, a plurality of line heads 2001 that are arranged on the same supporting mass 2010 use as standby parts mutually.Therefore, preferably these line heads 2001 are identical specification each other, but also they can be made different specifications each other, and adopting singly is not spare unit and line head 2001 with some complementary relationships.

In the lens arra 2031 that present embodiment is used, similarly adopted the SL array, its explanation of Therefore, omited with the employed lens arra 31 of first embodiment.

(line head)

The basic structure of the line head 2001 of present embodiment is identical with the structure of line head 1 shown in Figure 4, the explanation of the common part in Therefore, omited.In the present embodiment, use EL element as light-emitting component 2003.Here, though use organic EL, also its replacement can be used inorganic EL element as an example.

(organic EL and driving element)

Organic EL in the line head 2001 of present embodiment is identical with the structure shown in Fig. 6 A and Fig. 6 B with the detailed structure of driving element etc., the explanation of the common part in Therefore, omited.But, in the present embodiment, because supporting mass 2010 is double structures of doing the seal member 2003 of organic EL, so, must be the actinomorphic structure in bottom that the light that sent by luminescent layer 60 is penetrated from pixel capacitors 23 1 sides as organic EL 3.

Described as described above, in the present embodiment, be assigned a plurality of line heads 2001 (being columns of light elements 2003A) for 1 photosensitive drum body 2009.Therefore, can prolong life-span of line head, can carry out at a high speed and the typewriting of high light quantity as module.In addition, owing to carry out the switching of line head 2001 by the rotation of supporting mass 2010, so it is compact that the structure of line head module 2101 self becomes, thereby can make exposure device 2100 miniaturizations, and then can make with of the imaging device miniaturization of this exposure device 2100 as exposure mechanism.And, because supporting mass 2010 is double structures of doing the general seal member of the EL element 2003 that seals each line head 2001,, can reduce the cost of parts so compare with the situation that each line head 2001 is provided with seal member respectively.In addition, for a plurality of line heads 2001 of supporting mass 2010 carrying of present embodiment, should have to a certain degree intensity as prerequisite, therefore compare with the situation of using common thin hermetic sealing substrate, sealing intensity is improved.

Below, the imaging device that has the exposure device of above-mentioned embodiment as exposure mechanism is described.

(imaging device of series system)

Figure 16 is the figure of the 5th embodiment of expression imaging device of the present invention, and the symbol 2080 among Figure 16 is imaging devices of series system.This imaging device 2080 has disposed organic EL array line head 2101K, 2101C, 2101M, the 2101Y of above-mentioned embodiment respectively on 4 photosensitive drum body 41K, 41C of the same spline structure of correspondence, 41M, 41Y, except constituting the point of exposure device, have the structure common with imaging device shown in Figure 7, the symbol identical to common part mark, and omit explanation.

(imaging devices of 4 recycle design)

Below, the 6th embodiment of imaging device of the present invention is described.Figure 17 is the longitudinal section side view of the imaging device 2160 of 4 recycle design.This imaging device 2160 has the structure common with imaging device shown in Figure 8 except writing the point that adopts the line head module 2101 of above-mentioned embodiment in the mechanism 2167 at picture, the symbol identical to common part mark, and omit explanation.

In above-mentioned Figure 16, imaging device 2080,2160 shown in Figure 17, possesses exposure device of the present invention shown in Figure 1 as exposure device.

Therefore,, as mentioned above,, the sufficient life-span can be guaranteed, and typewriting at a high speed can be carried out by the switching of line head for these imaging devices 2080,2160.

(exposure device)

Other embodiments about exposure device of the present invention describe.Basic structure is identical with exposure device shown in Figure 1, its explanation of Therefore, omited.

(line head module)

Figure 18 A and Figure 18 B are the figure of the summary structure of expression line head module 3101, and Figure 18 A is its stereographic map, and Figure 18 B is its sectional view.

Shown in Figure 18 A and Figure 18 B, line head module 3101 is constituted as, and possesses: proper alignment has disposed the line head 3001 of a plurality of light-emitting components 3; Proper alignment has disposed the lens arra 3031 that makes from the lens element of the photoimaging of line head 3001; And the supporting mass 3010 of supporting line head 3001.

In Figure 18 A and Figure 18 B, it is foursquare prism that supporting mass 3010 is constituted as its cross section.Central authorities at supporting mass 3010 are provided with the turning axle 3010a parallel with the turning axle 3009a of photosensitive drum body 3009.

Turning axle 3010a is connected with control gear 3110, and by the control signal from this control gear 3110, controls its rotation.At a plurality of side faces of the Zhou Fangxiang of this supporting mass 3010 configuration, promptly on 4 of prism sides, be respectively equipped with line head 3001.And is the center rotation by supporting mass 3010 with turning axle 3010a, switches these line heads 3001.In addition, these line heads 3001 are corresponding to this switching, and driving also is switched, and during selecting specific line head 3001, the driving of other line head 3001 stops.

The switching of line head 3001 is for example carried out according to the reduction of the light quantity of the light-emitting component 3003 of outfit on the line head 3001.The light quantity of light-emitting component 3003 is to the inadequate situation of the exposure of photosensitive drum body 3009 (near the situation in life-span), control gear 3110 is that basic point makes supporting mass 3010 be rotated according to the mode of per 90 degree with turning axle 3010a, thereby can use other line head 3001.Can be by the reduction of Direct-detection Optical amounts such as sensor, also can judge the reduction of light quantity based on typewriting condition (light quantity, print speed printing speed etc.) or typewriting number.What wish is the switching of carrying out line head 3001 according to the reduction of light quantity automatically.For example, line head 3001 can have following structure, promptly when under 20ppm speed, can typewrite 200,000 situation of each line head 3001, if counting reaches 200,000 typewriting number, then control gear 3110 is automatically designed program, make supporting mass 3010 revolve and turn 90 degrees, can use new line head 3001 around turning axle 3010a.By this structure,, can become the specification of 800,000 typewriting numbers as imaging device.

At the central part of supporting mass 3010, be provided with from distolateral through hole (emptying aperture) 3010H in another distolateral perforation supporting mass 3010 of the length direction of supporting mass 3010.This through hole 3010H is configured for stream that heat eliminating medium is circulated in supporting mass 3010.This stream 3010H by making the internal circulation of heat eliminating medium at this stream 3010H, can cool off line head 3001 by supporting mass 3010 and line head 3001 hot tie-ins.Stream 3010H is configured to parallel with turning axle 3010a, is inflow entrances at the peristome (peristome in diagram left side) of the section opening of supporting mass 3010, and another peristome (peristome on diagram right side) is a flow export.In addition, in the present embodiment, stream 3010H is made the stream of linearity, but the shape of stream might not be limited to this shape.In addition, inflow entrance and the flow export of stream 3010H is provided with on the end face of supporting mass 3010, but also they can be located on the side face of supporting mass 3010 (part of line head 3001 is not set).

Figure 19 is the mode chart of the cooling body of expression line head module 3101.

The cooling body 3102 of present embodiment is by the stream 3010H that is located in the supporting mass 3010; The pipe 3103 that makes heat eliminating medium 3103a in this stream 3010H, flow into or flow out; Pump 3104 summaries that are connected with this pipe 3103 constitute.Pipe 3103 is installed in the both sides of inflow entrance and the flow export of stream 3010H, and the end of other of these pipes 3103,3103 connects together by pump 3104.Inside at pipe 3103 and stream 3010H is full of heat eliminating medium 3103a, and this heat eliminating medium 3103a is by pump 3104 circulations.In addition, though omitted diagram, in these circulating paths, be provided with the heat unit that the heat that has been absorbed by heat eliminating medium 3103a is emitted.

In the present embodiment, the switching that is accompanied by line head 3001 owing to supporting mass 3010 is rotated, so as pipe 3103, the pipe with flexibility that preferably can only be out of shape along with this rotation.As the material of pipe, be fit to use flexible good and resin, for example teflon (Teflon) (registered trademark) resin etc. with certain intensity.

In addition, supporting mass 3010 plays a role as heat-conducting medium, and so its hot tie-in stream 3010H and line head 3001 are as the material of supporting mass 3010, the high metallic materials of pyroconductivity such as preferred SUS, aluminium, brass.

As heat eliminating medium, can use the spy to open the known heat eliminating medium that flat 5-No. 121609 communiques or spy open record in flat 5-No. 326778 communiques etc.

The action of cooling body 3102 is according to the driving situation of line head 3001 and Be Controlled.For example, with the ON/OFF of printer main body or the driving of line head 3001/stop interlock and carry out the round-robin ON/OFF of heat eliminating medium 3103a.Perhaps, also can come Control Circulation speed according to the superheat state (temperature in the temperature of light-emitting component 3, fluorescent lifetime, luminosity, the exposure device 3100 etc.) of line head 3001.As the latter's method, can enumerate following method, promptly for example monitor the temperature of line head 3001, and control the rate of circulation of heat eliminating medium 3101a automatically, so that temperature is not more than 50 degrees centigrade by thermopair.Like this, control the circulation of heat eliminating medium 3101a, thereby make the output of line head 3001 stable, can obtain good typewriting quality according to the driving situation of line head.

In addition, in Figure 18 A and Figure 18 B, on 4 sides of supporting mass 3010, all be provided with line head 3001, but also can be following structure, promptly not necessarily line head 3001 need be set on whole sides, only on 2 in 4 sides or 3 sides line head 3001 be set.In addition, as supporting mass 3010, also can adopt 4 prisms multiedge cylinder in addition, for example tri-prismoid, pentagonal prism body, hexagonal prism ... Deng, can on the side more than at least 2 of these multiedge cylinders, line head 3001 be set.And, as supporting mass 3010, also can adopt right cylinder or oval cylinder etc. on the part of its side face, to have the structure of curved surface.In the column of these multiedge cylinders or right cylinder etc., in order to make lens arra 3031 universalizations, hope be that its cross sectional shape is regular polygon or circle.

In addition, in the present embodiment, a plurality of line heads 3001 that are arranged on the same supporting mass 3010 use as standby parts mutually.Therefore, preferably these line heads 3001 are identical specification each other, but also they can be made different specifications each other, and adopting singly is not spare unit and line head 3001 with some complementary relationships.

In the lens arra 3031 that present embodiment is used, similarly adopted the SLA array, its explanation of Therefore, omited with the employed lens arra 31 of first embodiment.

(line head)

The basic structure of the line head 3001 of present embodiment is identical with the structure of line head 1 shown in Figure 4, the explanation of the common part in Therefore, omited.

(organic EL and driving element)

Organic EL in the line head 3001 of present embodiment is identical with the structure shown in Fig. 6 A and Fig. 6 B with the detailed structure of driving element etc., the explanation of the common part in Therefore, omited.

Described as described above, in the present embodiment, be provided with the stream 3010H with this line head 3001 hot linked cooling usefulness in the inside of supporting mass 3010 of supporting line head 3001, heat eliminating medium 3101a circulated in this stream 3010H cool off line head 3001 with this.Therefore, can improve the durability of line head 3001, prolong the life-span of exposure device.In addition, in the present embodiment, be assigned a plurality of line heads 3001 (being columns of light elements 3003A) for 1 photosensitive drum body 3009.Therefore, can prolong the life-span of line head, can carry out at a high speed and the typewriting of high light quantity.In addition, owing to carry out the switching of line head 3001 by the rotation of supporting mass 3010, so it is compact that the structure of line head module 3101 self becomes, thereby can make exposure device 3100 miniaturizations, and then can make with of the imaging device miniaturization of this exposure device 3100 as exposure mechanism.

In addition, in the present embodiment, the structure of employing is be provided with a plurality of line heads 3001 and switch these line heads 3001 by the rotation of supporting mass 3010 on supporting mass 3010, but the present invention might not be limited to such structure.For example, also can adopt following structure, promptly the line head 3001 that is provided with on supporting mass 3010 has only one, and does not make supporting mass 3010 rotations.At this moment, owing to pipe 3103 does not deform, so, do not need necessarily have flexibility as its material.

Below, the imaging device that has the exposure device of above-mentioned embodiment as exposure mechanism is described.

(imaging device of series system)

Figure 20 is the figure of the 7th embodiment of expression imaging device of the present invention, and the symbol 3080 among Figure 20 is imaging devices of series system.This imaging device 3080 has disposed organic EL array line head 3101K, 3101C, 3101M, the 3101Y of above-mentioned embodiment respectively on 4 photosensitive drum body 41K, 41C of the same spline structure of correspondence, 41M, 41Y, except constituting the point of exposure device, have the structure common with imaging device shown in Figure 7, the symbol identical to common part mark, and omit explanation.

(imaging devices of 4 recycle design)

Below, the 8th embodiment of imaging device of the present invention is described.Figure 21 is the longitudinal section side view of the imaging device 3160 of 4 recycle design.This imaging device 3160 has the structure common with imaging device shown in Figure 8 except writing the point that adopts the line head module 3101 of above-mentioned embodiment in the mechanism 3167 at picture, the symbol identical to common part mark, and omit explanation.

In above-mentioned Figure 20, imaging device 3080,3160 shown in Figure 21, possesses exposure device of the present invention shown in Figure 1 as exposure device.

Therefore,, as mentioned above,, the sufficient life-span can be guaranteed, and typewriting at a high speed can be carried out by the switching of line head for these imaging devices 3080,3160.

In addition, the imaging device that possesses exposure device of the present invention is not limited to above-mentioned embodiment, also various distortion can be arranged.In addition, line head module of the present invention can be widely used in the various imaging devices of printer, duplicating machine etc.

More than, with reference to accompanying drawing on one side to of the present invention preferred embodiment be illustrated on one side, certainly, the present invention is defined in above-mentioned example.At example just such as many formation of each structure member shown in the above-mentioned example or combination, in the scope that does not break away from purport of the present invention, can carry out various changes according to designing requirement etc.

More than, though preferred embodiment of the present invention is illustrated, the present invention is not limited to these embodiment.In the scope that does not break away from aim of the present invention, can carry out interpolation, omission, displacement and other the change of structure.The present invention is not subjected to the qualification of above-mentioned explanation, and only the scope by the claim of adding is limited.

Claims (18)

1. line head module, it possesses line head, and described line head has a plurality of light-emitting components of proper alignment configuration, by the photographic layer of photosensitive drum body being exposed from the light of described light-emitting component, wherein,

Described line head module possesses supporting mass, and this supporting mass has the turning axle of the rotating shaft parallel of described relatively photosensitive drum body;

Described line head is provided with a plurality of, a plurality of described line heads, be set on the side face of described supporting mass and by described supporting mass and support, constituting by described supporting mass is center rotation and the structure can described relatively photosensitive drum body switched with described turning axle

Switch described a plurality of line head according to the reduction of described light-emitting component light quantity, make one of described a plurality of line heads corresponding with described photosensitive drum body.

2. line head module according to claim 1, wherein,

In described a plurality of line heads, comprise the line head that plurality of specifications is different, switch according to purposes between the different line head of these specifications.

3. line head module according to claim 2, wherein,

The line head of the same specification of the higher relatively kind of frequency of utilization in the different line head of described specification is provided with a plurality of, switches according to the reduction of described light-emitting component light quantity between the line head of these same specifications.

4. line head module according to claim 1, wherein,

Described light-emitting component is an EL element, and the face that is formed with described EL element one side of described line head is supported by described supporting mass, and described EL element is sealed by described supporting mass.

5. line head module according to claim 4, wherein,

Side at described supporting mass is provided with recess, is sealed with described EL element with airtight state in the described recess that is sealed between described supporting mass and described line head.

6. line head module according to claim 4, wherein,

The adhesive linkage that also possesses bonding described line head and described supporting mass covers described EL element by described adhesive linkage and described supporting mass.

7. exposure device, it possesses:

The described line head module of claim 1;

Photosensitive drum body, it is exposed by the light from the light-emitting component that described line head module possessed.

8. an imaging device possesses the described exposure device of claim 7 as exposure mechanism.

9. line head module according to claim 1, wherein,

Described line head module also possesses:.

Stream, it is arranged on the inside of described supporting mass, and via described supporting mass with described line head hot tie-in;

Heat eliminating medium, it circulates in described stream, thereby cools off described supporting mass.

10. line head module according to claim 9, wherein,

Described supporting mass is made of metal material.

11. line head module according to claim 9, wherein,

Control the circulation of described heat eliminating medium according to the driving situation of described line head.

12. line head module according to claim 9, wherein,

Also possess pipe, it is used to make described heat eliminating medium to flow into or flows out described stream.

13. line head module according to claim 1, wherein,

Described supporting mass is made of column or tabular body.

14. line head module according to claim 1, wherein,

On described a plurality of line heads, be respectively arranged with the optical imaging system that is used to make from the photoimaging of described light-emitting component.

15. line head module according to claim 1, wherein,

Described light-emitting component is an electroluminescent cell.

16. line head module according to claim 15, wherein,

Described light-emitting component is an organic electroluminescent device.

17. an exposure device, it possesses:

The described line head module of claim 9;

Photosensitive drum body, it is exposed by the light from the light-emitting component that described line head module possessed.

18. an imaging device possesses the described exposure device of claim 17 as exposure mechanism.

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