WO2010013540A1 - 光照射装置 - Google Patents
光照射装置 Download PDFInfo
- Publication number
- WO2010013540A1 WO2010013540A1 PCT/JP2009/059979 JP2009059979W WO2010013540A1 WO 2010013540 A1 WO2010013540 A1 WO 2010013540A1 JP 2009059979 W JP2009059979 W JP 2009059979W WO 2010013540 A1 WO2010013540 A1 WO 2010013540A1
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- WIPO (PCT)
- Prior art keywords
- led
- leds
- substrate
- led substrate
- housing
- Prior art date
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- 230000001678 irradiating effect Effects 0.000 title abstract 3
- 239000000758 substrate Substances 0.000 claims abstract description 75
- 238000005286 illumination Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000003825 pressing Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 230000004308 accommodation Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/062—LED's
- G01N2201/0627—Use of several LED's for spectral resolution
Definitions
- the present invention relates to a light irradiation apparatus that uses a plurality of LEDs and can irradiate, for example, a line of light, and is particularly suitably used for inspection such as the presence or absence of scratches in a predetermined irradiation region of a work (product) and mark reading. It is about what can be done.
- a light irradiation device such as a line light illumination device includes a long LED board on which a plurality of LEDs are mounted, and a housing that accommodates the LED board.
- the number of LEDs mounted on the LED substrate is limited by the relationship between the power supply voltage V E and the forward voltage V f of the LEDs.
- the number of the red LED to be mounted on the LED substrate is 10.
- the forward voltage V f in the case of a white LED is about 3.3 V, and the number of white LEDs mounted on the LED substrate is six.
- the forward voltage V f of the infrared LED is about 1.5 V, and the number of infrared LEDs mounted on the LED substrate is fifteen.
- casing which accommodates an LED board also differs according to the kind of LED, and there exists a problem that it is necessary to prepare each.
- the present invention has been made to solve the above problems all at once, and in a light irradiation apparatus using different types of LEDs, the size of the LED substrate is made the same, and the number of parts is made common by parts.
- the main objective is to reduce the manufacturing cost and the manufacturing cost.
- the light irradiation device is a light irradiation device including an LED substrate on which a plurality of identical LEDs are mounted, and a housing having a substrate housing space for housing the LED substrate, and a power supply voltage.
- the number of LEDs whose difference from the total forward voltage when LEDs are connected in series falls within a predetermined allowable range is defined as the number of LED units, and the number of LEDs mounted on the LED substrate is determined for each different type of LED. It is characterized by a common multiple of the number of LED units.
- the number of LEDs mounted on the LED substrate is the common multiple of the number of LED units determined for each different type of LED, and the same number of LEDs mounted on the LED substrate between different types of LEDs.
- the size of the LED boards on which different types of LEDs are mounted can be made the same.
- the same housing can be used as the housing for housing the LED substrates. For this reason, in the manufacture of the light irradiation device, components such as the LED substrate and the housing can be shared, the number of components can be reduced, and the manufacturing cost can be reduced.
- the number of LEDs mounted on the LED substrate is changed for each different type of LED. It is desirable that the least common multiple of the number of LED units determined by
- the LED mounted on the LED substrate is a surface mount type (chip type) LED
- the number of the LEDs mounted on the LED substrate is a common multiple of the number of LED units, and the number of different types of LEDs mounted is the same. The effect of the present invention can be made more remarkable.
- the size of the LED substrate can be made the same, and the number of parts and the manufacturing cost can be reduced.
- the perspective view of the light irradiation apparatus of this invention Sectional drawing of the embodiment.
- Sectional drawing of the light irradiation apparatus which concerns on other deformation
- FIG. 1 is a perspective view showing the light irradiation device 1 of the present embodiment
- FIG. 2 is a cross-sectional view of the light irradiation device 1
- FIG. 3 is a plan view of the LED substrate 2 on which the LEDs 21 are mounted.
- 4 is a circuit diagram when the red LED 21 is mounted
- FIG. 5 is a circuit diagram when the white LED 21 is mounted
- FIG. 6 is a circuit diagram when the infrared LED 21 is mounted.
- the light irradiation device 1 irradiates, for example, a predetermined irradiation region of a test object (work) with line-shaped light, and is obtained by photographing the predetermined irradiation region with an imaging device (not shown).
- the image data is used in a product inspection system or the like that takes in image data with an image processing apparatus (not shown) and performs automatic surface inspection for the presence or absence of scratches.
- this device includes an LED substrate 2, a housing 3, a heat transfer member 4, and a pressing member 5.
- the LED substrate 2 is a long substrate on which a plurality of identical LEDs 21 are mounted as shown in FIG.
- the LED board 2 has a plurality of LEDs 21 on the surface of a long printed wiring board, and the LED 21 is arranged in one or more rows in the short side direction so that the optical axis is aligned in a substantially constant direction and linear in the long side direction. These are machine-mounted in rows (3 rows in the figure).
- the LED 21 is supplied by controlling a voltage from a power source (not shown) by a voltage control circuit (not shown).
- the LED 21 is a surface mount type (in which a LED element 212 is disposed in the center of a thin rectangular plate-like package 211). Chip type).
- the LEDs 21 are arranged such that the LED elements 212 are arranged at predetermined intervals in the long side direction and the short side direction.
- the housing 3 has a housing recess 301 that forms a substrate housing space for housing the LED substrate 2.
- the housing 3 is made of a long metal and has a substantially U-shaped cross section orthogonal to the longitudinal direction (stretching direction).
- the housing recess 301 is formed by the left and right side walls 31, 32 and the bottom wall 33. It is formed.
- the accommodation recessed part 301 of this embodiment accommodates the two LED boards 2 continuously in a longitudinal direction.
- the housing 3 is an integral one formed by extrusion or pultrusion, and a plurality of grooves 3M extending in the longitudinal direction are provided on the outer peripheral surfaces of the left and right side walls 31, 32 and the bottom wall 33, and formed between them.
- the protrusions serve as the radiation fins F.
- a heat transfer member 4 is provided between the housing recess 301 and the LED substrate 2, and heat generated by the LED substrate 2 is transferred to the housing 3.
- the heat transfer member 4 is a belt-like flat plate having a width substantially the same as or slightly smaller than that of the LED substrate 2 and is formed of a material having a predetermined viscoelasticity and insulating properties such as silicon.
- the LED substrate 2 is deformed so as to be recessed by a component such as a resistor disposed on the back side of the LED substrate 2, and is ideally brought into surface contact with the back surface of the LED substrate 2 to form a housing from the LED 21. 3 to increase the efficiency of heat conduction to the bottom wall 33.
- the pressing member 5 has a plurality of lens portions 501 corresponding to the plurality of LEDs 21, and the long side end portion 201 of the LED substrate 2 faces the bottom surface of the housing recess 301 of the housing 3. To press.
- the pressing member 5 is provided continuously in series so as to correspond to each LED substrate 2 (see FIG. 1).
- the pressing member 5 has, for example, a substantially H-shaped cross section orthogonal to the longitudinal direction, and is formed at the lens forming portion 51 where the lens portion 501 is formed and at both ends of the lens forming portion 51 on the long side.
- the lens forming portion 51 and the flange portion 52 orthogonal to the lens forming portion 51 are included.
- the flange portion 52 is disposed to face the left and right side walls 31 and 32 of the housing 3 when the pressing member 5 is housed in the housing recess 301. Then, the substantially entire surface of the lower end surface 521 of the flange portion 52 is in contact with the longer side end portion 201 of the LED substrate 2, specifically, the outer upper surface of the LED substrate 2 than the LED 21.
- the flange portion 52 is set so that substantially all of the light emitted from the LED 21 passes through the lens portion 501 in a state where the lower end surface 521 of the flange portion 52 is in contact with the long side end portion 201 of the LED substrate 2. Has been.
- the pressing member 5 is provided on one of the housing 3 or the pressing member 5, and the first surface 61 facing the bottom surface side of the housing recess 301 and the housing 3 or It is fixed to the housing 3 by a fixing mechanism 6 that is provided on the other side of the pressing member 5 and includes a second surface 62 that faces the opening side of the housing recess 301 that contacts the first surface 61.
- a convex portion (not shown) provided on one of the LED substrate 2 or the pressing member 5 and the LED substrate 2 or the pressing member Positioned so that the central axis of the plurality of lens portions 501 and the optical axis of each of the plurality of LEDs 21 are aligned with a concave portion (not shown) that is provided on the other side of the member 5 and that fits into the convex portion.
- a positioning mechanism is provided. By this positioning mechanism, the LED 21 and the lens unit 501 are positioned in the long side direction and the short side direction.
- the number of LEDs 21 mounted on the LED substrate 2 of the present embodiment is the least common multiple of the number of LED units determined for each different type of LED 21.
- the different types of LEDs 21 include not only LEDs having different wavelengths of emitted light, but also LEDs having different numbers of LED elements disposed in the package 211 even if the wavelengths of emitted light are the same. Including. In any case, it is desirable that the packages 211 of the different types of LEDs 21 have the same shape. Further, the method for determining the number of LEDs 21 mounted on the LED substrate 2 is effective only when the voltages of the plurality of LEDs 21 are controlled.
- the “number of LED units” means the difference (V E ⁇ V f ⁇ N) between the power supply voltage V E and the total forward voltage V f (V f ⁇ N) when the LED 21 is connected in series. is the number of LED21 as a predetermined allowable range, a number of LED21 connected in series to the power supply voltage V E.
- the forward voltage V f of this embodiment is a forward voltage for each packaged LED 21.
- the “predetermined allowable range” means that a desired irradiation area is realized by one or a plurality of LED substrates 2 when the LEDs 21 are mounted on the LED substrate 2 by a common multiple of the number of LED units determined for different types of LEDs 21. Conditions (more specifically, conditions for reducing the least common multiple of the number of LED units determined for each type of LED 21 as much as possible) and increasing the number of LED units for each type of LED 21 as much as possible It depends on the conditions.
- the forward voltage V f of the red LED21 about 2.2V, the number of possible series connection the red LED21 to the power supply voltage V E is 10. That is, the number of LED units of the red LED 21 is ten.
- the forward voltage V f of the white LED21 is approximately 3.3V
- the number can be connected in series to the white LED21 to the power supply voltage V E is a six. That is, the number of LED units of the white LED 21 is six.
- the number which can connect white LED21 in series is also considered, it is set as the value which makes the least common multiple as small as possible in relation to the number of LED units of other types of LED21.
- the forward voltage V f of the infrared LED21 about 1.5V, the number can be connected in series with the infrared LED21 to the power supply voltage V E is 15. That is, the infrared LED 21 has 15 LED units.
- the LED unit number of the red LED 21 (10 pieces), the LED unit number of the white LED 21 (6 pieces), and the LED unit number of the infrared LED 21 (15 pieces), which is the least common multiple, 30 pieces are assigned to each color LED board 2.
- the number of LEDs 21 to be mounted is used.
- each LED 21 on the circuit As a connection method of each LED 21 on the circuit, a number of LEDs 21 corresponding to the number of LED units are connected in series, and the LED groups connected in series are connected in parallel so as to be the least common multiple. That is, in the case of the red LED 21, as shown in FIG. 4, ten red LEDs 21 are connected in series to form a red LED group, and the total number of red LEDs 21 is 30 (that is, the red LED group). Are connected in parallel in three rows. Further, in the case of the white LED 21, as shown in FIG. 5, six white LEDs 21 are connected in series to form a white LED group, and the total number of white LEDs 21 is 30 (that is, the white LED group). In parallel). Furthermore, in the case of the infrared LED 21, as shown in FIG. 6, 15 infrared LEDs 21 are connected in series to form an infrared LED group, and the total number of infrared LEDs 21 is 30 (that is, The infrared LED groups are connected in parallel in two rows.
- the arrangement of the LEDs 21 on the LED substrate 2 is the same for each color LED substrate 2, and as described above, as shown in FIG. 3, the LED 21 is linear in the long side direction with the optical axis aligned in a substantially constant direction. In this manner, they are arranged in a plurality of rows (three rows in FIG. 3).
- the number of the LEDs 21 mounted on the LED substrate 2 is the LED 21 of different types, with the least common multiple of the number of LED units of the different types of LEDs 21. Therefore, the sizes of the LED boards 2 on which the different types of LEDs 21 are mounted can be made the same. Moreover, when manufacturing the light irradiation apparatus 1 using different types of LEDs 21, the same housing 3 that houses the LED substrate 2 can be used. For this reason, in the manufacture of the light irradiation device 1, components such as the LED substrate 2 and the housing 3 can be shared, the number of components can be reduced, and the manufacturing cost can be reduced. .
- the position of the LED 21 on the LED substrate 2 can be made the same for each color LED 21, and a lens member (book) is placed in front of the LED 21.
- the same lens member (pressing member 5) can be used regardless of the type of the LED 21, and the lens member (pressing member 5) has versatility. The number of parts can be reduced, and the manufacturing cost can be reduced.
- the size of the LED substrate 2 is made as small as possible to improve versatility. Can do.
- the pressing member 5 of the embodiment includes a plurality of lens portions 501
- the LED 21 mounted on the LED substrate 2 is a bullet type
- the member 5 may have a through-hole 502 provided corresponding to each of the plurality of LEDs 21.
- the mold part 213 of the bullet-type LED 21 can be inserted into the through hole 502, and the light emitted from the mold part 213 can be emitted to the outside as it is.
- light emitted from the surface-mounted LED 21 can be emitted as it is.
- the light irradiation device 1 of the embodiment may include a diffusion plate that diffuses light from the LED 21 or an optical filter that selects and transmits only a predetermined wavelength.
- the length of the light irradiation device may be changed by associating the LED substrate with the pressing member and changing the number of the LED substrate and the pressing member in series.
- the number of LEDs is the least common multiple, but other common multiples may be used.
- the light irradiation device of the above embodiment has a substantially rectangular parallelepiped shape, and the LED substrate has a long shape, but is not limited thereto.
- the LED substrate may have a partial circular shape.
- the size of the LED substrate can be made the same, and the number of parts and the manufacturing cost can be reduced.
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
本実施形態に係る光照射装置1は、例えば検査物(ワーク)の所定照射領域にライン状の光を照射するもので、撮像装置(図示しない)で前記所定照射領域を撮影し、得られた画像データを、画像処理装置(図示しない)で取り込んで傷等の有無の自動表面検査を行う製品検査システム等に用いられる。
このように構成した本実施形態に係る光照射装置1によれば、LED基板2に搭載されるLED21の個数を、種類の異なるLED21のLED単位数の最小公倍数として、種類の異なるLED21であっても同じにしているので、種類の異なるLED21が搭載されたLED基板2同士の大きさを同じすることができる。また、種類の異なるLED21を用いた光照射装置1を製造する場合に、LED基板2を収容する筐体3として同一のものを用いることができる。このようなことから、光照射装置1の製造において、LED基板2及び筐体3などの部品を共通化することができ、部品点数を削減することができるとともに、製造コストを削減することができる。
なお、本発明は前記実施形態に限られるものではない。以下の説明において前記実施形態に対応する部材には同一の符号を付すこととする。
21 ・・・LED
2 ・・・LED基板
301・・・収容凹部(基板収容空間)
3 ・・・筐体
VE ・・・電源電圧
Vf ・・・順方向電圧
Claims (3)
- 複数の同一のLEDを搭載したLED基板と、
前記LED基板を収容する基板収容空間を有する筐体と、を備えた光照射装置であって、
電源電圧とLEDを直列に接続したときの順方向電圧の合計との差が所定の許容範囲となるLEDの個数をLED単位数とし、
前記LED基板に搭載されるLEDの個数を、種類の異なるLED毎に定まるLED単位数の公倍数としている光照射装置。 - 前記LED基板に搭載されるLEDの個数を、種類の異なるLED毎に定まるLED単位数の最小公倍数としている請求項1記載の光照明装置。
- 前記LEDが、表面実装型LEDである請求項1記載の光照射装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09802785.7A EP2306069B1 (en) | 2008-07-30 | 2009-06-01 | Light irradiating device |
US13/054,921 US8777450B2 (en) | 2008-07-03 | 2009-06-01 | Light irradiation device |
CN2009801299910A CN102105738B (zh) | 2008-07-30 | 2009-06-01 | 光照射装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008197040A JP4366431B1 (ja) | 2008-07-30 | 2008-07-30 | 光照射装置 |
JP2008-197040 | 2008-07-30 |
Publications (1)
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WO2010013540A1 true WO2010013540A1 (ja) | 2010-02-04 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2009/059979 WO2010013540A1 (ja) | 2008-07-03 | 2009-06-01 | 光照射装置 |
Country Status (5)
Country | Link |
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US (1) | US8777450B2 (ja) |
EP (1) | EP2306069B1 (ja) |
JP (1) | JP4366431B1 (ja) |
CN (1) | CN102105738B (ja) |
WO (1) | WO2010013540A1 (ja) |
Cited By (4)
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WO2012032925A1 (ja) * | 2010-09-07 | 2012-03-15 | シーシーエス株式会社 | Led配線基板及び光照射装置 |
JP2012133929A (ja) * | 2010-12-20 | 2012-07-12 | Mibu Denki Industrial Co Ltd | 盤内照明器具の取付構造 |
WO2013065146A1 (ja) * | 2011-11-02 | 2013-05-10 | 株式会社パトライト | 発光装置 |
WO2017170092A1 (ja) * | 2016-04-01 | 2017-10-05 | シーシーエス株式会社 | 光照射装置 |
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WO2011067426A1 (es) * | 2009-12-03 | 2011-06-09 | Kokoh Investigación, S.L. | Dispositivo de iluminación |
US8567986B2 (en) * | 2011-03-21 | 2013-10-29 | Component Hardware Group, Inc. | Self-contained LED tubular luminaire |
FR2974671B1 (fr) * | 2011-04-28 | 2013-04-12 | Saint Gobain | Module a diodes électroluminescentes et vitrage lumineux avec un tel module a diodes |
DE202011051669U1 (de) * | 2011-10-19 | 2013-01-21 | Zumtobel Lighting Gmbh | Leuchte |
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- 2009-06-01 US US13/054,921 patent/US8777450B2/en active Active
- 2009-06-01 CN CN2009801299910A patent/CN102105738B/zh active Active
- 2009-06-01 EP EP09802785.7A patent/EP2306069B1/en active Active
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JPH11162233A (ja) * | 1997-11-25 | 1999-06-18 | Matsushita Electric Works Ltd | 光源装置 |
JP2007507115A (ja) * | 2003-10-01 | 2007-03-22 | エナートロン, インコーポレイテッド | Led光エンジン用の方法および装置 |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012032925A1 (ja) * | 2010-09-07 | 2012-03-15 | シーシーエス株式会社 | Led配線基板及び光照射装置 |
JP2012059793A (ja) * | 2010-09-07 | 2012-03-22 | Ccs Inc | Led配線基板及び光照射装置 |
CN103081146A (zh) * | 2010-09-07 | 2013-05-01 | Ccs株式会社 | Led配线基板及光照射装置 |
JP2012133929A (ja) * | 2010-12-20 | 2012-07-12 | Mibu Denki Industrial Co Ltd | 盤内照明器具の取付構造 |
WO2013065146A1 (ja) * | 2011-11-02 | 2013-05-10 | 株式会社パトライト | 発光装置 |
JPWO2013065146A1 (ja) * | 2011-11-02 | 2015-04-02 | 株式会社パトライト | 発光装置 |
WO2017170092A1 (ja) * | 2016-04-01 | 2017-10-05 | シーシーエス株式会社 | 光照射装置 |
Also Published As
Publication number | Publication date |
---|---|
CN102105738A (zh) | 2011-06-22 |
EP2306069A1 (en) | 2011-04-06 |
JP4366431B1 (ja) | 2009-11-18 |
US8777450B2 (en) | 2014-07-15 |
EP2306069B1 (en) | 2017-03-29 |
JP2010033974A (ja) | 2010-02-12 |
EP2306069A4 (en) | 2014-12-03 |
US20110122623A1 (en) | 2011-05-26 |
CN102105738B (zh) | 2013-08-14 |
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