WO2018061407A1 - Source de lumière et dispositif de rétroéclairage - Google Patents

Source de lumière et dispositif de rétroéclairage Download PDF

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Publication number
WO2018061407A1
WO2018061407A1 PCT/JP2017/025480 JP2017025480W WO2018061407A1 WO 2018061407 A1 WO2018061407 A1 WO 2018061407A1 JP 2017025480 W JP2017025480 W JP 2017025480W WO 2018061407 A1 WO2018061407 A1 WO 2018061407A1
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WO
WIPO (PCT)
Prior art keywords
light
lens
light source
notch
backlight device
Prior art date
Application number
PCT/JP2017/025480
Other languages
English (en)
Japanese (ja)
Inventor
雅之 伊藤
藤井　秀和
健一 村越
行秀 早瀬
幡　俊雄
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2018061407A1 publication Critical patent/WO2018061407A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources

Definitions

  • the included angle ⁇ 1 formed by the straight line 7 and the notch line is within a range of 132.2 degrees or more and less than 180 degrees when the material of the lens 1 is PMMA resin. That's fine.
  • the depression angle ⁇ 1 is set to 135 degrees, for example.
  • the straight line 7 is a straight line connecting the center of the lens 1 and the intersection of the notch lines when viewed from the optical axis direction of the LED 3.
  • the notch line means an outline of two surfaces (notch surfaces) forming the notch portion 2 that are indicated by oblique lines in FIG. 2B and are visible from the optical axis direction of the LED 3. Shall.
  • the depression angle ⁇ 1 is assumed to be the larger one of the smaller angle and the larger angle formed by the intersecting straight line 7 and the notch line.
  • FIG. 4 (b) is the same as the x direction and y direction shown in FIG. 4 (a).
  • the z direction shown in FIG. 4B is a direction from the back to the front when the light source 100 is viewed from above.
  • FIG. 7 is a diagram illustrating an angle formed by a line passing through the lens center in the light source 100a and a tangent line of the notch line.
  • the lens 1a having such a shape As shown in FIG. 8, light from the LED 3 is incident on the surface of the notch 2 at a critical angle or more at which total reflection occurs. The light is totally reflected on the surface 2a and is not emitted from the notch 2a. The light is totally reflected by the cutout portion 2a, so that the light is emitted from the arc portion 8 in the lens 1a. Furthermore, compared with the lens 1, the length of the circular arc part 8 of the lens 1a when viewed from above is shortened, and the light emission range can be narrowed.
  • the depression angle ⁇ 2 causes light emission from the arcuate portion 8 to the direction in which the two cutout portions 2a face each other than in the case of the lens 1. Can be inside.
  • the directivity of light viewed from above can be limited to the arc portion 8.
  • the arc portion 8 falls within a critical angle of 132.2 degrees or more and less than 180 degrees where total reflection occurs.
  • the cut-out surface is a curved surface
  • the cut-out surface is a convex surface (the cut-out portion 2a of the lens 1a)
  • the reflected light can be focused, and if the cut-out surface is a concave surface, the reflection is performed.
  • Light can be dispersed. By converging the reflected light, it is possible to irradiate a place away from the lens 1a more effectively. Further, by dispersing the reflected light, it is possible to irradiate a place near the lens 1a more effectively.
  • the cut-out surface is a concave surface.
  • the notch surfaces in the light sources 100, 100a, 100b of Embodiment 1 are provided symmetrically on the side surfaces of the lenses 1, 1a, 1b. Not only such a symmetrical structure, but also a notch part on one side or a notch part having an asymmetrical shape may be provided in the lenses 1, 1 a, 1 b depending on the required light directivity.
  • FIG. 10A is a top view showing a light source 100c according to Embodiment 2 of the present invention.
  • FIG. 10B is a side view showing the light source 100c viewed from the cutout portion 2 side of the lens 1c.
  • FIG. 10C is a side view showing the light source 100c viewed from the arc portion side of the lens 1c.
  • the light source 100c (first light source) according to the present embodiment replaces the lens 1 of the light source 100 with a cutout portion 2, an arc portion 8, and a light incident portion.
  • the light source 100 is the same as the light source 100 except that a lens 1c having 4a and a recess 18 is provided.
  • the lens 1c and the light incident part 4a are different from the lens 1 and the light incident part 4, respectively.
  • FIG. 11A is a top view showing a light source 100d according to Embodiment 3 of the present invention.
  • FIG. 11B is a side view showing the light source 100d viewed from the cutout portion 2 side of the lens 1.
  • FIG. 11C is a side view showing the light source 100d as viewed from the arc portion 8 side of the lens 1.
  • the lens reinforcing plate 19 is fixed on the printed circuit board 6 by these feet 5. Further, the shape of the lens reinforcing plate 19 may be circular or quadrangular, and may be any shape as long as the lens 1 can be reinforced.
  • the lens reinforcing plate 19 is bonded to the lower surface of the lens 1 with an adhesive or the like. Thus, the strength of the lens 1 can be increased by bonding the lens reinforcing plate 19 to the lower surface of the lens 1.
  • the backlight device 200 includes a diffusion plate 21, an optical sheet 22, and a housing 23. Moreover, the housing
  • the backlight device 200 has a rectangular shape.
  • the light reflecting surface of the housing 23 is formed on a curved surface so that the central portion along the longitudinal direction of the backlight device 200 is lowest and both side edges are highest.
  • a diffusion plate 21 is provided on the housing 23 so as to cover the entire light reflection surface.
  • An optical sheet 22 having the same size as the diffusion plate 21 is provided on the upper surface of the diffusion plate 21.
  • the printed circuit board 6a has an elongated rectangular shape. Further, the printed circuit board 6a is disposed at the lowest central portion of the light reflecting surface at a portion extending over the entire length of the light reflecting surface. On the printed circuit board 6a, a plurality of light sources 100 are arranged at intervals so as to be arranged in a line. The light source 100 may be arranged on the printed circuit board 6a so as to be arranged in a plurality of rows.
  • One reflection sheet 20 is provided on each side of the printed board 6a on the light reflection surface.
  • the sides of the two reflection sheets 20 that are not in contact with the printed circuit board 6a are in contact with the highest side edges of the light reflection surface.
  • the reflection sheet 20 reflects the light emitted from the light source 100 to the diffusion plate 21.
  • the diffusion plate 21 and the optical sheet 22 adjust the dispersion and directivity of the light emitted from the light source 100 to improve the luminance of the surface of the backlight device 200 or improve the uniformity of the luminance of the surface.
  • the material constituting the diffusion plate 21 and the optical sheet 22 is selected, and the diffusion plate 21 and the optical sheet 22 are provided in the light source 100, thereby dispersing the emitted light. And adjusting the directivity.
  • the diffusion plate 21 diffuses incident light.
  • the thickness of the diffusion plate 21 is about 1 to 2 mm, and the diffusion plate 21 has mechanical strength. Further, the diffusion plate 21 plays a role of assisting the mechanical strength of the optical sheet 22. If the diffusion plate 21 is not provided, the optical sheet 22 will bend.
  • the optical sheet 22 has a prism and microlens structure, and has a function of increasing directivity and increasing the luminance of the backlight device 200, or a diffusion type.
  • the optical sheet 22 is used by stacking a plurality of sheets having respective functions.
  • the light emitted from the LEDs 3 of the light source 100 in the column direction of the plurality of light sources 100 is emitted to the arc portion 8 without loss by being totally reflected by the notch portion 2 of the lens 1 in the light source 100.
  • luminance of surfaces other than the center part of the backlight apparatus 200 can be improved efficiently. Therefore, the luminance of the surface of the backlight device 200 can be improved uniformly.
  • the backlight device 200 only one printed circuit board 6a on which the LED 3 and the lens 1 are mounted can be provided. Thereby, the cost of the printed circuit board 6a, the cost of the connector and wiring which are the connection parts which electrically connect the printed circuit board 6a, the man-hour at the time of the assembly of the backlight apparatus 200, etc. can be reduced. Therefore, an inexpensive backlight device 200 can be provided.
  • FIG. 13 (a) is a front view showing the backlight device 200a
  • FIG. 13 (b) is a cross-sectional view showing the backlight device 200a.
  • the light source 100 and the light source 100e (second light source) having no notches are alternately spaced on the printed circuit board 6a.
  • the light source 100 and the light source 100e may be regularly arrange
  • the backlight device 200a In order to ensure light in a direction perpendicular to the printed circuit board 6a, the printed circuit board 6a is disposed by the light source 100e having no notch. Light is emitted from the center. Further, the light source 100 irradiates light to the peripheral portion of the backlight device 200a where the reflection sheet 20 is disposed. As a result, even when the light source 100 that emits less light from the upper surface of the lens is used, a large amount of light is emitted from the upper part of the plurality of light sources 100 or 100e. The brightness can be made uniform.
  • FIG. 14 (a) is a front view showing the backlight device 200b
  • FIG. 14 (b) is a cross-sectional view showing the backlight device 200b.
  • the plurality of light sources 100 are arranged in a short direction of the backlight device 200b so as to form a plurality of parallel rows (two rows in the example shown in FIGS. 14A and 14B). Further, the light sources 100 in each column are arranged in a state where the positions in the respective columns are shifted in the column direction so as not to line up in a direction orthogonal to the columns. More specifically, in the light source 100, in two rows adjacent to each other, the center position between the two light sources 100 in one row and the position of one light source 100 in the other row are orthogonal to the row. It arrange
  • the light source 100 is arranged at a position shifted so as not to line up in the lateral direction of the backlight device 200b. For this reason, the light sources 100 can complement each other with less irradiation, and can irradiate light in a direction perpendicular to the printed circuit board 6b disposed at the center of the backlight device 200b. Therefore, the luminance of the surface of the backlight device 200b can be made uniform.
  • the light reflected by the notch part of the lens is emitted from the part without the notch part, whereby the light can be guided in a desired direction. Therefore, it is possible to provide a backlight device that has uniform surface brightness and is inexpensive.
  • the light sources 100, 100b, and 100c according to aspect 2 of the present invention are the above-described aspect 1, in which the optical axis of the light emitting unit (LED 3) and the center of the lenses 1, 1a, 1b, and 1c coincide with each other, A straight line connecting the intersection of the outlines seen from the optical axis direction of the light emitting part and the centers of the lenses 1, 1 a, 1 b, 1 c, of the two notch surfaces forming the notches 2, 2 a, 2 b,
  • the angle of the depression angle ⁇ 1 formed with the outline may be 132.2 degrees or more and less than 180 degrees.
  • the angle formed by the points on the outer peripheral portion of the lens becomes larger. Therefore, it is possible to widen the numerical range of the incident angle of the light that does not exit from the notch. As a result, the directivity of light viewed from the upper surface can be reduced to a portion having no notch.
  • the light source 100b according to the fourth aspect of the present invention is the light source 100b according to the first, second, or third aspect, wherein the notch portion 2b is located with respect to the optical axis of the light emitting unit when the lens 1b is viewed from the light emitting side. It may have an inclined surface 2b1 inclined.
  • the cutout portion since the cutout portion has the inclined surface, the incident angle is increased in more light emitted from the light emitting portion. Therefore, total reflection occurs at the notch with more light.
  • the lens 1c may be formed with a concave portion whose area decreases from the light emitting end toward the light emitting part.
  • the light incident on the notch part is totally reflected by the notch part and travels toward the part without the notch part. Therefore, light is not emitted from the upper surface of the lens, but is emitted from the side surface of the lens at a portion where there is no notch.
  • the light source 100, 100a, 100b according to the sixth aspect of the present invention is the light source 100, 100a, 100b according to any one of the first to fifth aspects, wherein the lenses 1, 1a, 1b are reinforcing plates (lens reinforcing plates) that reinforce the lenses 1, 1a, 1b. 19) It may be formed on the top.
  • the strength of the lens can be increased.
  • the backlight devices 200, 200a, and 200b according to the seventh aspect of the present invention reflect the light sources 100, 100a, and 100b according to any one of the first to sixth aspects and the light emitted from the light sources 100, 100a, and 100b.
  • a plurality of light sources 100, 100a, 100b arranged in a line on a single substrate, and the notches 2, 2a, 2b of the light sources 100, 100a, 100b are respectively You may face the row direction where the light sources 100, 100a, 100b are arranged.
  • the backlight device 200a according to aspect 8 of the present invention does not include the light sources 100, 100a, and 100b as the first light source and the notches 2, 2a, and 2b on the substrate in the aspect 7.
  • a plurality of second light sources (light sources 100e) may be regularly arranged.
  • the brightness of the entire surface of the backlight device can be made uniform.
  • the light sources 100, 100a, and 100b are arranged in a plurality of rows on the substrate and do not line up in a direction perpendicular to the row direction. It may be arranged.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)

Abstract

La présente invention concerne une source de lumière (100) qui est pourvue d'une DEL (3), et d'une lentille (1) qui guide la lumière vers la direction prédéterminée, ladite lumière ayant été émise par la DEL (3). La lentille (1) présente un évidement (2) formé par découpe d'une surface latérale dans une plage angulaire prédéterminée, ladite surface latérale étant orthogonale à la direction d'axe optique de la section électroluminescente.
PCT/JP2017/025480 2016-09-30 2017-07-13 Source de lumière et dispositif de rétroéclairage WO2018061407A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-194558 2016-09-30
JP2016194558 2016-09-30

Publications (1)

Publication Number Publication Date
WO2018061407A1 true WO2018061407A1 (fr) 2018-04-05

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PCT/JP2017/025480 WO2018061407A1 (fr) 2016-09-30 2017-07-13 Source de lumière et dispositif de rétroéclairage

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WO (1) WO2018061407A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022044389A (ja) * 2020-09-07 2022-03-17 岩崎電気株式会社 投光器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI703387B (zh) * 2019-08-07 2020-09-01 友達光電股份有限公司 光學透鏡、發光裝置及背光模組

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012101715A1 (fr) * 2011-01-25 2012-08-02 パナソニック株式会社 Dispositif de rétroéclairage et dispositif d'affichage à cristaux liquides
JP2012231023A (ja) * 2011-04-26 2012-11-22 Enplas Corp 光束制御部材、この光束制御部材を備えた発光装置およびこの発光装置を備えた面光源装置。
JP2013157258A (ja) * 2012-01-31 2013-08-15 Canon Inc 光源装置および表示装置
WO2013157243A1 (fr) * 2012-04-17 2013-10-24 株式会社エンプラス Elément de commande de flux lumineux, appareil émetteur de lumière et appareil d'éclairage
JP2016162685A (ja) * 2015-03-04 2016-09-05 パナソニックＩｐマネジメント株式会社 レンズ、レンズユニット及び照明器具

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012101715A1 (fr) * 2011-01-25 2012-08-02 パナソニック株式会社 Dispositif de rétroéclairage et dispositif d'affichage à cristaux liquides
JP2012231023A (ja) * 2011-04-26 2012-11-22 Enplas Corp 光束制御部材、この光束制御部材を備えた発光装置およびこの発光装置を備えた面光源装置。
JP2013157258A (ja) * 2012-01-31 2013-08-15 Canon Inc 光源装置および表示装置
WO2013157243A1 (fr) * 2012-04-17 2013-10-24 株式会社エンプラス Elément de commande de flux lumineux, appareil émetteur de lumière et appareil d'éclairage
JP2016162685A (ja) * 2015-03-04 2016-09-05 パナソニックＩｐマネジメント株式会社 レンズ、レンズユニット及び照明器具

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022044389A (ja) * 2020-09-07 2022-03-17 岩崎電気株式会社 投光器
JP7424254B2 (ja) 2020-09-07 2024-01-30 岩崎電気株式会社 投光器

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