JP3139787U - Scanner light source - Google Patents

Scanner light source Download PDF

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JP3139787U
JP3139787U JP2007009649U JP2007009649U JP3139787U JP 3139787 U JP3139787 U JP 3139787U JP 2007009649 U JP2007009649 U JP 2007009649U JP 2007009649 U JP2007009649 U JP 2007009649U JP 3139787 U JP3139787 U JP 3139787U
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light source
mounting plate
leds
scanner
light
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岳興 李
文勝 劉
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▲うぇい▼強科技股▲ふん▼有限公司
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Abstract

【課題】輝度が均一で、構造が簡単なスキャナ光源を提供する。
【解決手段】本考案のスキャナ光源は搭載板１０および複数のＬＥＤ２０を備える。ＬＥＤ２０は直線且つ分散して搭載板１０上に設置され、搭載板１０中央部から搭載板１０両端にかけて各ＬＥＤ２０間の間隔が徐々に縮小される。それによって、本考案のスキャナ光源１はその他の発光部材を加えなくても光学レンズ辺縁部分の輝度減衰を補償することができ、構造が簡単であり、製造および組立に便利である。
【選択図】図２A scanner light source having uniform brightness and a simple structure is provided.
A scanner light source according to the present invention includes a mounting plate and a plurality of LEDs. The LEDs 20 are linearly and dispersedly installed on the mounting board 10, and the distance between the LEDs 20 is gradually reduced from the center of the mounting board 10 to both ends of the mounting board 10. Accordingly, the scanner light source 1 of the present invention can compensate for the luminance attenuation at the edge portion of the optical lens without adding any other light emitting member, has a simple structure, and is convenient for manufacturing and assembly.
[Selection] Figure 2

Description

本考案はスキャナ光源に関し、特に、輝度の分布が均一なスキャナ光源に関する。 The present invention relates to a scanner light source, and more particularly, to a scanner light source having a uniform luminance distribution.

科学技術の発展に伴って、スキャナはすでにキーボードおよびマウスに続いて広く使用されているコンピュータの入力装置となっている。スキャナは主に光源、光学レンズ、感光部材およびデジタル変換装置を備える。運転時、光源からの光が被読取物に照射された後反射され、反射後の光が光学レンズを通過して感光部材上に画像が形成され、感光部材は光信号を電気信号に変換し、電気信号はデジタル変換装置によってデジタル信号に変換されてコンピュータに送信される。従って、感光部材が受信する光の輝度および均一度はスキャナの読取品質に直接影響する。 With the development of science and technology, scanners have already become widely used computer input devices following keyboards and mice. The scanner mainly includes a light source, an optical lens, a photosensitive member, and a digital conversion device. During operation, the light from the light source is applied to the object to be read and reflected, and the reflected light passes through the optical lens to form an image on the photosensitive member. The photosensitive member converts the optical signal into an electrical signal. The electric signal is converted into a digital signal by a digital conversion device and transmitted to the computer. Therefore, the brightness and uniformity of the light received by the photosensitive member directly affects the reading quality of the scanner.

従来技術において、スキャナの光源は一般に冷陰極管（ＣＣＦＬ）が採用されるが、冷陰極管の発光特性は灯管の中央部分から放出される光の輝度が高く、両端から放出される光の輝度は低い。また、光が光学レンズを通過するとき、有効視野角によって光学レンズの辺縁から遠い光は輝度が減衰し、感光部材に照射される光の輝度が不均一になり、スキャナの読取品質を高めることができない。 In the prior art, a cold cathode fluorescent lamp (CCFL) is generally used as the light source of the scanner, but the emission characteristics of the cold cathode fluorescent lamp are high in the brightness of light emitted from the central portion of the lamp tube, and the light emitted from both ends of the lamp. The brightness is low. Further, when light passes through the optical lens, the brightness of the light far from the edge of the optical lens is attenuated due to the effective viewing angle, and the brightness of the light irradiated to the photosensitive member becomes non-uniform, thereby improving the reading quality of the scanner. I can't.

図１は特許文献１において開示される光源両端の輝度を高めることができる光源装置１”を示す模式図である。光源装置１”は大型ランプ１０”、少なくとも一つの第１の小型ランプ２０”および少なくとも一つの第２の小型ランプ３０”を備える。大型ランプ１０”は第１端１１”および第２端１２”を有し、第１の小型ランプ２０”および第２の小型ランプ３０”はそれぞれ大型ランプ１０”の第１端１１”および第２端１２”付近に設置され、第１端１１”および第２端１２”の光の輝度を補充する。光源装置１”の大型ランプ１０”の第１端１１”および第２端１２”の輝度は高められ、光学レンズ辺縁の光の輝度減衰は補償される。しかし、光源装置１”に少なくとも一つの第１の小型ランプ２０”および少なくとも一つの第２の小型ランプ３０”を設置しなくてはならないので、光源装置１”の構造が複雑になり、製造および組立に不便である。
台湾専利公告第４７８６９７号明細書 特開平９−１１４９６３号公報 FIG. 1 is a schematic view showing a light source device 1 ″ that can increase the luminance at both ends of the light source disclosed in Patent Document 1. The light source device 1 ″ is a large lamp 10 ″ and at least one first small lamp 20 ″. And at least one second small lamp 30 ". The large lamp 10" has a first end 11 "and a second end 12", and the first small lamp 20 "and the second small lamp 30" The large lamp 10 ″ is installed near the first end 11 ″ and the second end 12 ″, respectively, and replenishes the light intensity at the first end 11 ″ and the second end 12 ″. The large lamp 10 ″ of the light source device 1 ″. The brightness of the first end 11 ″ and the second end 12 ″ of the optical lens is increased and the brightness attenuation of the light at the edge of the optical lens is compensated. However, the light source device 1 ″ includes at least one first small lamp 20 ″ and At least one second "Because must be installed, the light source device 1" type lamp 30 structure is complicated and inconvenient to manufacture and assemble.
Taiwan Exclusive Notification No. 478697 Specification JP-A-9-114963

本考案の目的は、上述の従来技術における欠点を解決できる、輝度が均一で、構造が簡単なスキャナ光源を提供することにある。 An object of the present invention is to provide a scanner light source having a uniform brightness and a simple structure, which can solve the above-mentioned drawbacks in the prior art.

上述の目的を解決するために、本考案のスキャナ光源は、搭載板および複数のＬＥＤを備え、ＬＥＤは直線且つ分散して搭載板上に設置され、搭載板の中央部から搭載板の両端にかけて各ＬＥＤ間の間隔が徐々に縮小される。 In order to solve the above-described object, a scanner light source of the present invention includes a mounting plate and a plurality of LEDs, and the LEDs are installed on the mounting plate in a straight line and distributed from the center of the mounting plate to both ends of the mounting plate. The interval between each LED is gradually reduced.

本考案のスキャナ光源は、ＬＥＤが直線且つ分散して搭載板上に設置され、スキャナ光源両端から放出される光の輝度を高める。本考案ではその他の発光部材を設置しなくても光学レンズ辺縁部分の輝度減衰を補償することができ、感光部材上に照射される光の輝度を均一にすることができる。本考案は従来技術と比較して構造が簡単であり、製造および組立に便利である。 In the scanner light source of the present invention, LEDs are installed on a mounting plate in a linear and dispersed manner, and the brightness of light emitted from both ends of the scanner light source is increased. In the present invention, the luminance attenuation at the edge portion of the optical lens can be compensated without installing another light emitting member, and the luminance of the light irradiated on the photosensitive member can be made uniform. The present invention has a simple structure as compared with the prior art, and is convenient for manufacturing and assembly.

本考案の目的、特徴および効果を示す実施例を図に沿って詳細に説明する。 Embodiments showing the objects, features, and effects of the present invention will be described in detail with reference to the drawings.

図２は本考案のスキャナ光源１の第１の実施例を示す模式図である。図３は本考案のスキャナ光源１の第１の実施例を示す断面図である。スキャナ光源１は、長い板状の搭載板１０、複数のＬＥＤ２０および二つのカバー３０を備える。ＬＥＤ２０は搭載板１０上に直線に設置され、搭載板１０の中央部から両端にかけて各ＬＥＤ２０間の間隔は徐々に縮小される。二つのカバー３０はそれぞれ搭載板１０の相対する両側部に設置され、二つのカバー３０は搭載板１０に搭載されたＬＥＤ２０の一側から湾曲して弧形を呈する。カバー３０は内側面３１を有し、内側面３１上には光反射層（図示せず）が設置される。二つのカバー３０間には出光口４０が形成される。 FIG. 2 is a schematic diagram showing a first embodiment of the scanner light source 1 of the present invention. FIG. 3 is a sectional view showing a first embodiment of the scanner light source 1 of the present invention. The scanner light source 1 includes a long plate-shaped mounting plate 10, a plurality of LEDs 20, and two covers 30. The LEDs 20 are installed on the mounting board 10 in a straight line, and the distance between the LEDs 20 is gradually reduced from the center of the mounting board 10 to both ends. The two covers 30 are respectively installed on opposite side portions of the mounting plate 10, and the two covers 30 are curved from one side of the LED 20 mounted on the mounting plate 10 to have an arc shape. The cover 30 has an inner side surface 31, and a light reflecting layer (not shown) is installed on the inner side surface 31. A light exit 40 is formed between the two covers 30.

ＬＥＤ２０から放出される光の一部は直接出光口４０から放出され、その他の一部の光はカバー３０の内側面３１に反射した後、出光口４０から放出される。出光口４０から放出された光は被読取物に投射され、被読取物に照射された後反射され、反射後の光は光学レンズ（図示せず）を通過し、感光部材（図示せず）に画像が形成される。搭載板１０両端のＬＥＤ２０間の間隔が搭載板１０中央部分のＬＥＤ２０の間隔よりも狭いので、光学レンズ辺縁部分の光の輝度減衰を効果的に補償でき、感光部材が受ける光の輝度は均一なものとなる。 A part of the light emitted from the LED 20 is directly emitted from the light exit port 40, and the other part of the light is reflected from the inner surface 31 of the cover 30 and then emitted from the light exit port 40. The light emitted from the light exit port 40 is projected onto the object to be read, irradiated to the object to be read and then reflected, and the reflected light passes through an optical lens (not shown) and is a photosensitive member (not shown). An image is formed. Since the interval between the LEDs 20 at both ends of the mounting plate 10 is narrower than the interval between the LEDs 20 at the center of the mounting plate 10, it is possible to effectively compensate for the luminance attenuation of the light at the edge of the optical lens, and the luminance of the light received by the photosensitive member is uniform. It will be something.

図４は本考案のスキャナ光源１の第２の実施例を示す模式図である。本実施例は第１の実施例の構造と類似しており、本実施例によるスキャナ光源１は、搭載板１０、複数のＬＥＤ２０’およびカバー３０を備える。第１の実施例と異なる点は、ＬＥＤ２０’が等間隔に搭載板１０上に直線に設置されており、各ＬＥＤ２０’の放出する光の輝度は異なり、搭載板１０の中央部から両端のＬＥＤ２０’にかけて輝度が徐々に高くなっている点にある。搭載板１０両端に設置されるＬＥＤ２０’の輝度は搭載板１０中央部のＬＥＤ２０’の輝度よりも高く、それによって光学レンズ辺縁部分の光の輝度減衰を効果的に補償でき、感光部材が受ける光の輝度は均一なものとなる。 FIG. 4 is a schematic view showing a second embodiment of the scanner light source 1 of the present invention. This embodiment is similar to the structure of the first embodiment, and the scanner light source 1 according to this embodiment includes a mounting plate 10, a plurality of LEDs 20 ′, and a cover 30. The difference from the first embodiment is that the LEDs 20 ′ are installed in a straight line on the mounting plate 10 at equal intervals, and the brightness of the light emitted from each LED 20 ′ is different, and the LEDs 20 at both ends from the center of the mounting plate 10. The brightness gradually increases toward '. The brightness of the LEDs 20 ′ installed at both ends of the mounting plate 10 is higher than the brightness of the LEDs 20 ′ at the center of the mounting plate 10, thereby effectively compensating for the brightness attenuation of the light at the edge of the optical lens and received by the photosensitive member. The brightness of the light is uniform.

上述のように、本考案のスキャナ光源１はＬＥＤ２０、２０’が搭載板１０上に直線且つ分散して設置され、スキャナ光源１両端から放出される光の輝度を高めることによって光学レンズ辺縁部分の光の輝度減衰を効果的に補償でき、感光部材が受ける光の輝度は均一にすることができ、従来技術と比較して構造が簡単で、製造および組立に便利である。 As described above, in the scanner light source 1 of the present invention, the LEDs 20 and 20 ′ are installed in a straight line and dispersed on the mounting plate 10, and the edge of the optical lens is increased by increasing the luminance of light emitted from both ends of the scanner light source 1. Therefore, the light intensity received by the photosensitive member can be made uniform, the structure is simple compared with the prior art, and it is convenient for manufacturing and assembly.

上述の説明は本考案の好適な実施例を示すものであり、本考案の範囲を限定するものではなく、当該技術に熟知する者は本考案の主旨を逸脱しない範囲における修飾または変更を行うことができ、それらは全て本考案の実用新案登録請求の範囲に含まれる。 The above description shows a preferred embodiment of the present invention, and does not limit the scope of the present invention. Those skilled in the art should make modifications or changes within the scope of the present invention. These are all included in the scope of the utility model registration claim of the present invention.

特許文献１において開示される光源両端の輝度を高めることができる光源装置を示す模式図である。It is a schematic diagram which shows the light source device which can raise the brightness | luminance of the light source both ends disclosed in patent document 1. FIG. 本考案のスキャナ光源の第１の実施例を示す模式図である。It is a schematic diagram which shows the 1st Example of the scanner light source of this invention. 本考案のスキャナ光源の第１の実施例を示す断面図である。It is sectional drawing which shows the 1st Example of the scanner light source of this invention. 本考案のスキャナ光源の第２の実施例を示す模式図である。It is a schematic diagram which shows the 2nd Example of the scanner light source of this invention.

符号の説明Explanation of symbols

１ スキャナ光源
１０ 搭載板
２０、２０’ ＬＥＤ
３０ カバー
３１ 内側面
４０ 出光口 1 Scanner light source 10 Mounting plate 20, 20 ′ LED
30 Cover 31 Inner side 40 Light exit

Claims (3)

搭載板および複数のＬＥＤを備え、
前記ＬＥＤは、前記搭載板上に直線且つ分散して設置され、前記搭載板中央部から前記搭載板両端にかけて前記各ＬＥＤ間の間隔が徐々に縮小されることを特徴とするスキャナ光源。 Equipped with a mounting plate and a plurality of LEDs,
The scanner is characterized in that the LEDs are installed linearly and dispersedly on the mounting plate, and the distance between the LEDs is gradually reduced from the center of the mounting plate to both ends of the mounting plate. 前記スキャナ光源は、二つのカバーを有し、前記カバーは前記搭載板の相対する両側部にそれぞれ設置され、前記二つのカバーは前記搭載板の前記ＬＥＤが搭載される一側から湾曲して弧形を呈し、前記二つのカバー間には出光口が形成されることを特徴とする請求項１記載のスキャナ光源。   The scanner light source has two covers, and the covers are respectively installed on opposite side portions of the mounting plate. The two covers are curved from one side of the mounting plate where the LED is mounted and arced. The scanner light source according to claim 1, wherein the scanner light source has a shape and a light exit is formed between the two covers. 前記カバーは、内側面を有し、前記内側面上には反射層が設置されることを特徴とする請求項２記載のスキャナ光源。   The scanner light source according to claim 2, wherein the cover has an inner surface, and a reflective layer is disposed on the inner surface.
JP2007009649U 2007-12-17 2007-12-17 Scanner light source Expired - Fee Related JP3139787U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8264750B2 (en) 2009-03-11 2012-09-11 Fuji Xerox Co., Ltd. Image reading apparatus
US8559072B2 (en) 2009-07-17 2013-10-15 Fuji Xerox Co., Ltd. Image reading apparatus and linear light source unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8264750B2 (en) 2009-03-11 2012-09-11 Fuji Xerox Co., Ltd. Image reading apparatus
US8559072B2 (en) 2009-07-17 2013-10-15 Fuji Xerox Co., Ltd. Image reading apparatus and linear light source unit

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