JPH0590483U - Light emitting device - Google Patents
Light emitting deviceInfo
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- JPH0590483U JPH0590483U JP3363592U JP3363592U JPH0590483U JP H0590483 U JPH0590483 U JP H0590483U JP 3363592 U JP3363592 U JP 3363592U JP 3363592 U JP3363592 U JP 3363592U JP H0590483 U JPH0590483 U JP H0590483U
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- light emitting
- cover
- emitting device
- air
- lens array
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Abstract
(57)【要約】
【目的】 容易かつ効率的な冷却と清掃を可能にする。
【構成】 発光ダイオードアレイユニツト１の外装カバ
ー１４とレンズアレイ１０との間に隙間２２を設け、こ
の隙間２２を通して吸込フアン２１によつて外部空気を
外装カバー１０内へ取り込む。取り込まれた空気によつ
て各部の冷却が成され、しかも空気流Ａがレンズアレイ
１０の前面部分にも生じるので、その空気流Ａによつて
レンズアレイ１０の前面部分の塵埃等も共に取り込まれ
て、レンズアレイ１０のレンズ面における塵埃等の付着
を防ぐ。
(57) [Summary] [Purpose] To enable easy and efficient cooling and cleaning. [Structure] A gap 22 is provided between the exterior cover 14 of the light emitting diode array unit 1 and the lens array 10, and external air is taken into the exterior cover 10 through the gap 22 by a suction fan 21. The air taken in cools each part, and since the air flow A is also generated in the front part of the lens array 10, the air flow A also takes in dust and the like on the front part of the lens array 10. Therefore, adhesion of dust and the like to the lens surface of the lens array 10 is prevented.
Description
【０００１】[0001]
本考案は、電子写真装置等に適用され、ＬＥＤＡ（発光ダイオードアレイ）等 の発光部を有する発光装置に関する。 The present invention is applied to an electrophotographic device or the like and relates to a light emitting device having a light emitting portion such as an LEDA (light emitting diode array).
【０００２】[0002]
図１０は従来の現像システムの一例の説明図であり、２個のＬＥＤＡユニツト １，２を感光体ドラム３周部に設置した例を示しており、感光体ドラム３を第１ 帯電チヤージヤ４により帯電し、まず第１ＬＥＤＡユニツト１により露光して潜 像を形成する。第１現像ユニツト５により潜像がトナー現像され、次の帯電工程 へと進む。 FIG. 10 is an explanatory diagram of an example of a conventional developing system, and shows an example in which two LEDA units 1 and 2 are installed on the peripheral portion of the photosensitive drum 3, and the photosensitive drum 3 is formed by the first charging charger 4. It is charged and first exposed by the first LEDA unit 1 to form a latent image. The latent image is toner-developed by the first developing unit 5, and the process proceeds to the next charging step.
【０００３】 感光体ドラム３に対する２回目の帯電を第２帯電チヤージヤ６により行い、第 ２ＬＥＤＡユニツト２による露光後、第２現像ユニツト７によりトナー現像が行 われる。The second charging of the photosensitive drum 3 is performed by the second charging charger 6, and after the exposure by the second LEDA unit 2, the second developing unit 7 develops the toner.
【０００４】 図１１は前記ＬＥＤＡユニツト１，２の要部の斜視図であり、１０はレンズア レイであるＳＬＡ（セルフオツクレンズアレイ：商品名）、１１は基板１２上に アレイ状に設置され、基板１２に搭載された図示しないドライブＩＣにより駆動 されるＬＥＤチツプ、１３はＳＬＡ１０を基板１２に支持するためのブラケツト 、１４は外装カバーである。FIG. 11 is a perspective view of the main parts of the LEDA units 1 and 2, 10 is a lens array, SLA (self-locking lens array: product name), and 11 are arrayed on a substrate 12. An LED chip driven by a drive IC (not shown) mounted on the substrate 12, 13 is a bracket for supporting the SLA 10 on the substrate 12, and 14 is an exterior cover.
【０００５】 前記ＬＥＤＡユニツト１，２は、前記感光体ドラム３および第１、第２現像ユ ユニツト５，７に対して非常に近い位置に設置されるため、感光体ドラム３側に 近接するＳＬＡ１０表面が、トナーや塵埃によつて汚染され易い。このため、露 光光量の低下、あるいは光量のばらつきを生じ、画質を損ねてしまう原因となる ので、定期的な清掃が必要であつた。Since the LEDA units 1 and 2 are installed very close to the photoconductor drum 3 and the first and second developing units 5 and 7, the SLA 10 close to the photoconductor drum 3 side is provided. The surface is easily contaminated with toner and dust. As a result, the amount of exposed light is reduced or the amount of light is varied, which causes the image quality to be impaired. Therefore, regular cleaning is necessary.
【０００６】 また近年では、ＬＥＤＡユニツト１，２の高速ドライブが行われているが、そ の動作時の発熱量の増大が問題となり、発熱による影響を抑制するため冷却手段 を備えている。この冷却手段としては、特開昭６０−１３６７１８号公報に示さ れたように空冷用のフアンを用いるもの、あるいは特開平２−１８４４６６号公 報に示されたように基板の外側に放熱フインを設けたものがある。In recent years, high-speed driving of the LEDA units 1 and 2 has been performed, but an increase in the amount of heat generated during the operation becomes a problem, and a cooling means is provided to suppress the influence of heat generation. As this cooling means, a fan for air cooling is used as shown in JP-A-60-136718, or a radiation fin is provided on the outside of the substrate as shown in JP-A-2-184466. There is one provided.
【０００７】[0007]
しかし前記ＬＥＤＡユニツト１，２において、ＳＬＡ１０の清掃作業は煩雑で あり、さらに前記フアンあるいは放熱フインによる冷却は、充分かつ効果的でな いという問題があつた。 However, in the LEDA units 1 and 2, the cleaning work of the SLA 10 is complicated, and furthermore, the cooling by the fan or the heat radiation fin is not sufficient and effective.
【０００８】 本考案の目的は、容易かつ効率的な冷却と清掃が行える発光装置を提供するこ とにある。An object of the present invention is to provide a light emitting device that can be easily and efficiently cooled and cleaned.
【０００９】[0009]
上記目的は、レンズアレイ体と、発光素子と、発光素子をアレイ状に支持する 基板と、カバーと、カバー内に空気を流通させるためのフアンとを備えた発光装 置において、前記レンズアレイ体とカバーとにおける上下の少なくとも一方の間 に、外部空気吸込用の隙間あるいは通孔を設けた構成によつて達成される。 The above object is to provide a light emitting device including a lens array body, a light emitting element, a substrate that supports the light emitting elements in an array, a cover, and a fan for circulating air in the cover. This is achieved by providing a gap or a through hole for sucking external air between at least one of the upper and lower sides of the cover and the cover.
【００１０】 また前記隙間あるいは通孔を、流通空気の上流側より下流側の方を小さくした 構成によつても達成される。Further, the gap or the through hole can also be achieved by a configuration in which the downstream side of the circulating air is smaller than the upstream side.
【００１１】 また前記カバーの断面形状を、内部表面積が流通空気の上流側より下流側の方 が大きくなるようにした構成によつても達成される。The cross-sectional shape of the cover can also be achieved by a structure in which the internal surface area is larger on the downstream side than on the upstream side of the circulating air.
【００１２】 また冷却用ダクトを設け、その断面形状を、内部表面積が流通空気の上流側よ り下流側の方が大きくなるようにした構成によつても達成される。Further, the cooling duct is provided, and the cross-sectional shape thereof is also achieved by a configuration in which the internal surface area is larger on the downstream side of the circulating air than on the upstream side.
【００１３】 さらに前記カバー内部に放熱フインを設けた構成によつても達成される。Further, it can be achieved by a structure in which a heat dissipation fin is provided inside the cover.
【００１４】[0014]
フアンにより外部空気をカバー内に取り込むことによつて、カバー内の各部に 対する冷却がなされ、しかもレンズアレイ体とカバー間の隙間あるいは通孔から 、レンズアレイ体の前面部分のトナーや塵埃を空気と共に取り込むことにより、 レンズアレイ体への塵埃等の付着、および付着が原因する汚染が防止される。 By taking in external air into the cover with a fan, each part inside the cover is cooled, and the toner or dust on the front part of the lens array body is cooled through the gaps or through holes between the lens array body and the cover. Incorporation together with the lens array prevents dust and the like from adhering to the lens array body and contamination caused by the adhering.
【００１５】 またレンズアレイ体の長手方向における隙間あるいは通孔での空気取り込み量 を均一にできるため、レンズアレイ体の全域にわたつて良好な冷却および清掃が なされる。Further, since the amount of air taken in through the gaps or through holes in the longitudinal direction of the lens array body can be made uniform, good cooling and cleaning can be performed over the entire area of the lens array body.
【００１６】 またカバーあるいは冷却用ダクトにおいて流通空気の下流に向かつて放熱面積 を増すことによつて、レンズアレイ体の長手方向で均一な冷却効果が得られる。Further, by increasing the heat radiation area toward the downstream of the circulating air in the cover or the cooling duct, a uniform cooling effect can be obtained in the longitudinal direction of the lens array body.
【００１７】 さらにカバー内部に放熱フインを設けることで、取り込んだ空気を用いて各部 の冷却がより効率的に行われる。Further, by providing the heat dissipation fins inside the cover, each part can be cooled more efficiently by using the taken air.
【００１８】[0018]
以下、本考案の実施例を図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
【００１９】 図１及び図２は本考案の第１実施例を説明するためのもので、図１は本考案の 第１実施例の全体斜視図、図２は第１実施例の正面図で、以下、図１１で説明し た部材と対応する部材には同一符号を付して、詳しい説明は省略する。1 and 2 are for explaining a first embodiment of the present invention, FIG. 1 is an overall perspective view of the first embodiment of the present invention, and FIG. 2 is a front view of the first embodiment. Hereafter, members corresponding to those described with reference to FIG. 11 will be assigned the same reference numerals and detailed description thereof will be omitted.
【００２０】 図１、図２において、ＬＥＤＡユニツト１の外装カバー１４には、その長手方 向の一方の開口に、ダクト２０を介して吸込フアン２１が連結されており、さら に外装カバー１４の前面におけるＳＬＡ１０との間には隙間２２，２２がそれぞ れ形成されている。この隙間２２は、流入空気Ａの上流側（他方の開口側）ａよ り下流側（一方の開口側）ｂに向かつて徐々に幅が小さくなつている。また２３ は塵埃等を除去するエアフイルタである。In FIG. 1 and FIG. 2, the exterior cover 14 of the LEDA unit 1 has a suction fan 21 connected to one opening in the longitudinal direction thereof via a duct 20. Clearances 22 and 22 are formed between the front surface and the SLA 10, respectively. The gap 22 is gradually narrowed toward the downstream side (one opening side) b of the inflowing air A from the upstream side (other opening side) a. An air filter 23 removes dust and the like.
【００２１】 このように構成された前記第１実施例によれば、吸込フアン２１によつて外部 空気が外装カバー１４内に流入し、内部各部の冷却がなされ、しかも隙間２２に おけるＳＬＡ１０の前面部分での流入空気Ａによつて塵埃等も取り込まれて、Ｓ ＬＡ１０のレンズ面における塵埃等の付着が防止される。また隙間２２の幅を、 流入空気Ａの上流側（他方の開口側）ａより下流側（一方の開口側）ｂに向かつ て徐々に小さくさせたことにより、隙間２２における空気取り込み量が均一化し 、各部での冷却、清掃が等しくなされる。According to the first embodiment configured as described above, the outside air flows into the exterior cover 14 by the suction fan 21, the internal parts are cooled, and the front surface of the SLA 10 in the gap 22 is provided. Dust or the like is also taken in by the inflowing air A in the portion, and the dust or the like is prevented from adhering to the lens surface of the SLA 10. Further, the width of the gap 22 is gradually reduced from the upstream side (the other opening side) a of the inflow air A toward the downstream side (the one opening side) b, so that the air intake amount in the gap 22 is uniform. The parts are cooled and cleaned equally.
【００２２】 図３は本考案の第２実施例の正面図で、前記第１実施例の隙間２２に代えて、 外装カバー１４とＳＬＡ１０との間に複数の通孔２５，２５，…を穿設し、各通 孔２５，２５，…の開口面積を、流入空気Ａの上流側より下流側の方を徐々に小 さくしてある。FIG. 3 is a front view of the second embodiment of the present invention. Instead of the gap 22 of the first embodiment, a plurality of through holes 25, 25, ... Are formed between the outer cover 14 and the SLA 10. , And the opening area of each of the through holes 25, 25, ... Is gradually reduced from the upstream side of the inflowing air A to the downstream side.
【００２３】 なお、前記各実施例の隙間２２と通孔２５は、外装カバー１４とＳＬＡ１０と が接する上下側の少なくとも一方側に設ければよい。The gap 22 and the through hole 25 in each of the above-described embodiments may be provided on at least one of the upper and lower sides where the exterior cover 14 and the SLA 10 are in contact with each other.
【００２４】 図４は本考案の第３実施例の側面図で、外装カバー１４内部のブラケツト１３ に放熱フイン３０が突設されており、前記隙間２２あるいは通孔２５等から流入 する空気を放熱フイン３０に接触させて、基板１２あるいはＬＥＤチツプ１１の 冷却も可能にしている。また図５に示したように、基板１２の背面と外装カバー １４との間に空気通路３１を形成し、空気通路３１に流入する空気を通過させて 冷却効果を上げてもよい。FIG. 4 is a side view of the third embodiment of the present invention, in which a radiator fin 30 is provided on the bracket 13 inside the exterior cover 14 so as to radiate the air flowing in through the gap 22 or the through hole 25. By contacting the fins 30, the board 12 or the LED chips 11 can be cooled. Further, as shown in FIG. 5, an air passage 31 may be formed between the back surface of the substrate 12 and the exterior cover 14 to allow the air flowing into the air passage 31 to pass therethrough to enhance the cooling effect.
【００２５】 図６及び図７は本考案の第４実施例を説明するためのもので、図６は本考案の 第４実施例の全体斜視図、図７（ａ）は図６の外装カバー１４のＡ−Ａ部分断面 図、図７（ｂ）は図６の外装カバー１４のＢ−Ｂ部分断面図である。6 and 7 are for explaining a fourth embodiment of the present invention. FIG. 6 is an overall perspective view of the fourth embodiment of the present invention, and FIG. 7A is an exterior cover of FIG. 14 is a partial sectional view taken along the line AA of FIG. 14, and FIG. 7B is a partial sectional view taken along the line BB of the exterior cover 14 of FIG. 6.
【００２６】 この第４実施例では、流入空気Ａの下流側ｂの吸込フアン２１と、必要に応じ て設けられる上流側ａの防塵フイルタ３５とが備えられ、ＬＥＤＡユニツト１の 外装カバー１４の流入空気Ａの上流側ａより下流側ｂの方が空気が暖かくなり、 冷却効果が小さくなることを抑制するため、外装カバー１４の断面形状を、内部 の表面積が前記上流側ａより下流側ｂの方が大きくなるようにしている。In the fourth embodiment, the suction fan 21 on the downstream side b of the inflowing air A and the dustproof filter 35 on the upstream side a provided as necessary are provided, and the inflow of the exterior cover 14 of the LEDA unit 1 is performed. In order to prevent the warming of the air on the downstream side b from the upstream side a of the air A and the reduction of the cooling effect, the outer cover 14 has a cross-sectional shape whose inner surface area is smaller than that of the upstream side a. I am trying to get bigger.
【００２７】 図７（ａ），（ｂ）に示すように、外装カバー１４内に突設した放熱フイン３ ６の突出量を上流側ａで小さくし、下流側ｂで大きくしている。また放熱フイン ３６の単位面積当たりの設置数を上流側で少なくし、下流側で多くしてもよい。As shown in FIGS. 7 (a) and 7 (b), the protruding amount of the heat dissipation fin 36 provided in the exterior cover 14 is reduced on the upstream side a and increased on the downstream side b. Further, the number of heat dissipation fins 36 installed per unit area may be decreased on the upstream side and increased on the downstream side.
【００２８】 図８は本考案の第５実施例の全体斜視図で、外装カバー１４の背面に内部に放 熱フイン４０を突設した冷却用ダクト４１を吸込フアン２１と連結させたもので あり、図９（ａ）の図８における冷却用ダクト４１のＡ−Ａ部分断面図、図９（ ｂ）の図８における冷却用ダクト４１のＢ−Ｂ部分断面のように、第４実施例と 同様に放熱フイン４０の突出量を上流側ａで小さくし、下流側ｂで大きくしてい る。また放熱フイン４０の単位面積当たりの設置数を上流側で少なくし、下流側 で多くしてもよい。この冷却用ダクト４１を外装カバー１４の区画とは独立して 設けたことにより、この実施例の場合、防塵フイルタは全く不要である。FIG. 8 is an overall perspective view of a fifth embodiment of the present invention, in which a cooling duct 41 having a heat releasing fin 40 protruding from the inside of the outer cover 14 is connected to the suction fan 21. 9A is a partial sectional view taken along the line AA of the cooling duct 41 in FIG. 8A and FIG. 9B is a partial sectional view taken along the line BB of the cooling duct 41 in FIG. Similarly, the amount of protrusion of the heat dissipation fin 40 is reduced on the upstream side a and increased on the downstream side b. Further, the number of heat dissipating fins 40 installed per unit area may be decreased on the upstream side and increased on the downstream side. Since this cooling duct 41 is provided independently of the compartment of the exterior cover 14, in the case of this embodiment, the dustproof filter is completely unnecessary.
【００２９】[0029]
以上説明したように、本考案の発光装置によれば、レンズアレイ体とカバーと の間に設けた隙間あるいは通孔によつて、冷却およびレンズアレイ体の塵埃等に よる汚染防止が行われ、またレンズアレイ体の長手方向における隙間あるいは通 孔での空気取り込み量を均一にして、全域にわたつて良好な冷却および清掃が行 え、またカバーあるいは冷却用ダクトにおいて流通空気の下流に向かつて放熱面 積を増すことで、全域にわたつて均一な冷却が行え、さらにカバー内部に放熱フ インを設けることで、取り込んだ空気を用いて各部の冷却がより効率的に行える 。 As described above, according to the light emitting device of the present invention, the clearance or the through hole provided between the lens array body and the cover prevents the lens array body from being polluted by dust and the like. In addition, the amount of air taken in through the gaps or through holes in the longitudinal direction of the lens array body is made uniform, and good cooling and cleaning can be performed over the entire area. By increasing the surface area, uniform cooling can be performed over the entire area, and by providing a heat dissipation fin inside the cover, each part can be cooled more efficiently using the taken air.
【図１】本考案の発光装置の第１実施例の全体斜視図で
ある。FIG. 1 is an overall perspective view of a light emitting device according to a first embodiment of the present invention.
【図２】第１実施例の正面図である。FIG. 2 is a front view of the first embodiment.
【図３】本考案の第２実施例の正面図である。FIG. 3 is a front view of a second embodiment of the present invention.
【図４】本考案の第３実施例の側面図である。FIG. 4 is a side view of a third embodiment of the present invention.
【図５】空気通路を示す断面図である。FIG. 5 is a cross-sectional view showing an air passage.
【図６】本考案の第４実施例の全体斜視図である。FIG. 6 is an overall perspective view of a fourth embodiment of the present invention.
【図７】図６の外装カバーの断面図である。7 is a cross-sectional view of the exterior cover of FIG.
【図８】本考案の第５実施例の全体斜視図である。FIG. 8 is an overall perspective view of a fifth embodiment of the present invention.
【図９】図８の冷却用ダクト部分の断面図である。9 is a cross-sectional view of the cooling duct portion of FIG.
【図１０】従来の現像システムの一例の説明図である。FIG. 10 is an illustration of an example of a conventional developing system.
【図１１】図１０のＬＥＤＡユニツトの要部の斜視図で
ある。11 is a perspective view of a main part of the LEDA unit of FIG.
１，２ ＬＥＤＡユニツト １０ ＳＬＡ １１ ＬＥＤチツプ １２ 基板 １３ ブラケツト １４ 外装カバー ２０ 吸込フアン ２２ 隙間 1, 2 LEDA unit 10 SLA 11 LED chip 12 Substrate 13 Bracket 14 Exterior cover 20 Suction fan 22 Gap
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０４Ｎ 1/036 Ａ 9070−5Ｃ 1/04 １０２ 7251−5Ｃ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical indication H04N 1/036 A 9070-5C 1/04 102 7251-5C
Claims (5)
子をアレイ状に支持する基板と、カバーと、カバー内に
空気を流通させるためのフアンとを備えた発光装置にお
いて、前記レンズアレイ体とカバーとにおける上下の少
なくとも一方の間に、外部空気吸込用の隙間あるいは通
孔を設けたことを特徴とする発光装置。1. A light emitting device comprising a lens array body, a light emitting element, a substrate for supporting the light emitting element in an array, a cover, and a fan for circulating air in the cover. A light emitting device, wherein a gap or a through hole for sucking external air is provided between at least one of the upper and lower sides of the cover and the cover.
流側より下流側の方を小さくしたことを特徴とする請求
項１の発光装置。2. The light emitting device according to claim 1, wherein the gap or the through hole is smaller on the downstream side than on the upstream side of the circulating air.
流通空気の上流側より下流側の方が大きくなるようにし
たことを特徴とする請求項１の発光装置。3. The light emitting device according to claim 1, wherein the cross-sectional shape of the cover is such that the inner surface area of the cover is larger on the downstream side than on the upstream side of the circulating air.
内部表面積が流通空気の上流側より下流側の方が大きく
なるようにしたことを特徴とする請求項１の発光装置。4. A cooling duct is provided, the cross-sectional shape of which is
2. The light emitting device according to claim 1, wherein the internal surface area is larger on the downstream side than on the upstream side of the circulating air.
とを特徴とする請求項１の発光装置。5. The light emitting device according to claim 1, wherein a heat dissipation fin is provided inside the cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3363592U JPH0590483U (en) | 1992-05-21 | 1992-05-21 | Light emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3363592U JPH0590483U (en) | 1992-05-21 | 1992-05-21 | Light emitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0590483U true JPH0590483U (en) | 1993-12-10 |
Family
ID=12391916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3363592U Pending JPH0590483U (en) | 1992-05-21 | 1992-05-21 | Light emitting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0590483U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006027198A (en) * | 2004-07-21 | 2006-02-02 | Seiko Epson Corp | Line head and image forming apparatus |
| JP2009272322A (en) * | 2008-04-30 | 2009-11-19 | Canon Inc | Light emitting device |
| JP2012187723A (en) * | 2011-03-08 | 2012-10-04 | Ricoh Co Ltd | Image forming apparatus |
| JP2013120235A (en) * | 2011-12-06 | 2013-06-17 | Canon Inc | Image forming apparatus |
| JP2016057340A (en) * | 2014-09-05 | 2016-04-21 | 富士ゼロックス株式会社 | Image formation device |
| JP2021154537A (en) * | 2020-03-25 | 2021-10-07 | 富士フイルムビジネスイノベーション株式会社 | Light-emitting device and drawing device |
-
1992
- 1992-05-21 JP JP3363592U patent/JPH0590483U/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006027198A (en) * | 2004-07-21 | 2006-02-02 | Seiko Epson Corp | Line head and image forming apparatus |
| JP2009272322A (en) * | 2008-04-30 | 2009-11-19 | Canon Inc | Light emitting device |
| JP2012187723A (en) * | 2011-03-08 | 2012-10-04 | Ricoh Co Ltd | Image forming apparatus |
| JP2013120235A (en) * | 2011-12-06 | 2013-06-17 | Canon Inc | Image forming apparatus |
| JP2016057340A (en) * | 2014-09-05 | 2016-04-21 | 富士ゼロックス株式会社 | Image formation device |
| JP2021154537A (en) * | 2020-03-25 | 2021-10-07 | 富士フイルムビジネスイノベーション株式会社 | Light-emitting device and drawing device |
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