WO2012124052A1 - 電子装置及び電子装置における導光方法 - Google Patents
電子装置及び電子装置における導光方法 Download PDFInfo
- Publication number
- WO2012124052A1 WO2012124052A1 PCT/JP2011/056016 JP2011056016W WO2012124052A1 WO 2012124052 A1 WO2012124052 A1 WO 2012124052A1 JP 2011056016 W JP2011056016 W JP 2011056016W WO 2012124052 A1 WO2012124052 A1 WO 2012124052A1
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- WIPO (PCT)
- Prior art keywords
- light
- light guide
- electronic device
- optical axis
- guide plate
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/145—Housing details, e.g. position adjustments thereof
Definitions
- the present invention relates to a light guide method in an electronic apparatus and an electronic device, to a structure for guiding light, especially from a light source to the display section of the housing.
- Electronic devices are provided with a plurality of display units that emit light in order to inform the user of the operating state.
- a light source for causing the display unit to emit light a liquid crystal, an organic EL element, a light emitting diode (LED), or the like is used.
- the display unit is provided on an upper surface or a front surface of the electronic device.
- a light source for causing the display unit to emit light can be provided in the vicinity of the display unit.
- the installation of a plurality of light sources in the vicinity of the display units may be restricted from the viewpoints of layout in the housing, ease of assembly, and the like. Therefore, it provided away light source from the display unit, sometimes configured to guide from there to the display section light in the light guide plate is adopted.
- Patent Document 1 the light emitted from the light source through a plurality of light guide plates, techniques guided to the display portion is disclosed.
- the display unit is provided so as to be exposed on the outer surface of the housing.
- the box is often not a strict cuboid.
- electronic devices such as a projector device
- rounded housing In consideration of design property, are often employed rounded housing.
- the relative positional relationship between the light source and the display unit may be different for each display unit, and the amount of light reaching the display unit may be different for each display unit.
- the brightness differs for each display unit, making it difficult to provide good visibility.
- An object of the present invention is to provide brightness of light emitted from an emission part in an electronic device that guides light emitted from a plurality of light sources provided in a housing by a plurality of light guide plates and emits the light from the emission part of the light guide plate.
- An object of the present invention is to provide an electronic device capable of suppressing the variation of the above.
- Another object of the present invention is to provide a light guide method capable of suppressing variations in the brightness of light emitted from an emission part in such an electronic device.
- an electronic device in a housing, a housing, a plurality of light sources each emitting light along an optical axis facing the same direction, and the housing. And a plurality of light guide plates that respectively guide light emitted from the plurality of light sources.
- Each light guide plate has an incident surface on which light emitted from the light source is incident, and a light emitting portion that is exposed on the outer surface of the housing.
- Any of the light guide plates has an incident surface angle that is a narrow angle formed by the normal of the incident surface and the optical axis of the light incident on the incident surface so that the optical axis of the light guided through the light guide plate passes through the emitting portion. And any other light guide plate.
- a light guide method in an electronic device emits light from a plurality of light sources provided in a housing along an optical axis directed in the same direction,
- the light emitted from the light source is incident on the incident surfaces of a plurality of light guide plates provided inside the housing, the inside of each light guide plate is guided, and the light is emitted from the exit portion provided exposed on the outer surface of the housing; ,have.
- the light emitted from the light source is an incident surface angle that is a narrow angle formed by the normal of the incident surface and the optical axis of the light incident on the incident surface so that the optical axis of the light guided through the light guide plate passes through the emitting unit.
- the incident surface angle is adjusted to be different between any of the light guide plates and any of the other light guide plates so that the optical axis of the light guided through the light guide plate passes through the emitting portion. The For this reason, the variation in the brightness of the light emitted from the emission part can be suppressed.
- an electronic device that guides light emitted from a plurality of light sources provided inside a housing with a plurality of light guide plates and emits the light from the exit portion of the light guide plate, the brightness of the light emitted from the exit portion It is possible to provide an electronic device capable of suppressing the variation of the above. Further, according to the present invention, in such an electronic device, it is possible to provide a light guide method that can suppress variation in brightness of light emitted from the emission unit.
- FIG. 1 is an overall perspective view of a projection display device according to an embodiment of the present invention. It is an enlarged view of the display part vicinity.
- FIG. 3 is a top view seen from the line 3A-3A in FIG.
- FIG. 3 is a side view seen from the line 3B-3B in FIG. 2.
- It is a partial top view inside an apparatus (illustration of a light-guide plate is abbreviate
- FIG. 6 is a side view of the light source substrate and the light guide plate as viewed from line 6-6 in FIG. It is sectional drawing of a light-guide plate. It is a top view of a light-guide plate.
- An embodiment of an electronic apparatus of the present invention will be described by taking a projection display device as an example.
- the present invention is applicable to all kinds of electronic devices as long as the light emitted from the plurality of light sources provided inside the housing is guided by the plurality of light guide plates and the light is emitted from the light emission portion of the light guide plate. Can be applied.
- FIG. 1 is an overall perspective view of a projection display device according to an embodiment of the present invention.
- Projection display device 1 has an overall housing 2 between the surfaces are connected by gentle curves cuboid.
- the front surface 3 is provided with a projection lens 4 for projecting an image.
- the ridge line 6 of the housing 2 that defines the boundary between the front surface 3 and the upper surface 5 of the housing 2 is gradually lowered toward the left and right side surfaces 7 of the projection display device 1, and the projection type becomes closer to the left and right side surfaces 7. It is located behind the display device 1.
- the front surface 3 of the projection display device 1 is highest at the central portion, gradually lowers toward the side surface 7, and the central portion protrudes forward most.
- the xyz coordinates shown in each figure are a projection display device in which the width direction when the projection display device 1 is viewed from the front is the x direction, the height direction (vertical direction) is the z direction, and is orthogonal to the x direction and the z direction.
- the depth direction of 1 is the y direction.
- FIG. 2 is an enlarged view of part A of FIG. 1, showing the vicinity of the display part in detail.
- 3A and 3B are a partial top view and a partial side view of the housing as seen from the lines 3A-3A and 3B-3B in FIG. 2, and conceptually show the position of the display unit.
- a plurality of, here, four display units (first to fourth display units 8a to 8d) are arranged along the ridgeline 6 of the housing 2.
- the first to fourth display portions 8a to 8d are formed by an emission portion 16 of light guide plates 11a to 11d to be described later, and display the operation state of the projection display device 1 by emitting light.
- the ridgeline 6 of the projection display device 1 is a three-dimensional curve, and the positions of the first to fourth display units 8a to 8d are different from each other both in the horizontal direction and in the vertical direction. That is, the y-coordinates (depth direction) of the first to fourth display units 8a to 8d are different from each other, and the z-coordinates (vertical direction) of the first to fourth display units 8a to 8d are also different from each other.
- the y coordinates of some or all of the display units 8a to 8d may match, and the z coordinates of some or all of the display units 8a to 8d may match.
- the front display 3 and the upper surface 5 of the projection display device 1 are also provided. In addition, all the display portions 8a to 8d can be visually recognized.
- FIG. 4 is a partial top view of the projection display device.
- the light source substrate 21 is provided near the bottom surface (not shown) of the projection display device 1. Since the front 3 of the housing 2 is curved, forward edge 22 of the light source substrate 21 is inclined with respect to the x-axis.
- the housing 2 is provided with openings 23a to 23d to which the first to fourth display portions 8a to 8d are attached. The openings 23a to 23d correspond to the positions of the first to fourth display portions 8a to 8d. ing.
- the light source substrate 21 is provided with first to fifth light sources 24a to 24e.
- the first to third light sources 24a to 24c correspond to the first to third display portions 8a to 8c.
- Fourth, fifth light source 24d, 24e corresponds to the fourth display section 8d, y coordinates are the same are different x coordinates. Since the fourth display unit 8d can emit light with higher luminance than the other display units 8a to 8c by the light from the two light sources 24d and 24e, it can be used, for example, for power on / off display.
- As the light sources 24a to 24e surface-emitting light emitting diodes are used. However, the present invention is not limited to this, and any illumination means such as a liquid crystal or an organic EL element can be used.
- the light source substrate 21 is preferably a single substrate where all the light sources 24a ⁇ 24e is mounted, it may be divided into two or more substrates.
- the light source substrate 21 is disposed substantially parallel to the bottom surface of the projection display device 1, that is, substantially horizontally in the housing 2, and the z-direction coordinates of the light sources 24a to 24e are the same.
- the light sources 24a ⁇ 24e, each optical axis is mounted on the light source substrate 21 so as to face the vertical direction (y-direction) upward.
- the optical axis does not have to be directed upward in the vertical direction, but all the light sources 24a to 24e each emit light along the optical axis directed in the same direction.
- FIG. 5 is a partial top view of the projection display device similar to FIG. In the figure, a plurality of light guide plates are also shown in addition to the light source substrate.
- FIG. 6 is a side view of the light source substrate and the plurality of light guide plates as seen from line 6-6 in FIG.
- Each of the plurality of light guide plates includes first to fourth light guide plates 11a to 11d for guiding light emitted from the light source, and the first to fourth light guide plates 11a to 11d are connected to each other by a holding member 12.
- the first to fourth light guide plates 11a to 11d are provided for the respective display portions 8a to 8d.
- the first to fourth light guide plates 11a to 11d are formed of polycarbonate and are fixed inside the housing 2 via the holding member 12.
- the holding member 12 is integrally formed with the first to fourth light guide plates 11a to 11d, but may be formed as a separate member.
- the first light guide plate 11a is located in the center of the projection display device 1, the fourth light guide plate 11d is on the side surface 7 side of the projection display device 1.
- the distance from the projection lens 4 attached to the front surface 3 of the projection display device 1 is the smallest for the first light guide plate 11a and the largest for the fourth light guide plate 11d.
- FIG. 7 shows a cross-sectional view of the light guide plate. Since the basic configuration is common to the first to fourth light guide plates 11a to 11d, the first to fourth light guide plates 11a to 11d are simply referred to as the light guide plate 11 in the following description. Similarly, the light sources 24a to 24e are simply referred to as the light source 24.
- the light guide plate 11 includes a lower light guide plate 13 (see also FIG. 5) having an incident surface 15 on which light from the light source 24 is incident, and an upper light guide plate 14 connected to the lower light guide plate 13 and having an output portion 16 (FIG. 5). See also).
- the emission part 16 of the upper light guide plate 14 is exposed to the outer surface of the casing 2 through the openings 23a to 23d of the casing 2, and constitutes the respective display sections 8a to 8d.
- the incident surface 15 of the lower light guide plate 13 is configured as a plane opposite to the light source 24 formed on the light source substrate 21 so that light emitted from the light source 24 is incident thereon.
- Figure 7 is a path of the light emitted from the emitting unit 16 is guided to the light guide plate 11 is emitted from the light source 24 shown schematically.
- the incident surface angle ⁇ i is equal to the incident angle ⁇ i of the light incident from the light source 24 on the incident surface 15.
- the incident surface angle ⁇ i is set to other than 0 degree, and the light incident on the incident surface 15 is refracted at the refraction angle ⁇ r and changes its traveling direction.
- the light whose traveling direction has been changed travels straight through the lower light guide plate 13 and the upper light guide plate 14 and is emitted from the emission portion 16 of the upper light guide plate 14, that is, the display portions 8a to 8d.
- the form included angle between the optical axis 26 of the light guided within the optical axis 25 and the light guide plate 11 of the incident light and the total refraction angle [theta] g. ⁇ g ⁇ i + ⁇ r. Further, the distance between the z coordinate of the incident position on the incident surface 15 of the optical axis 25 of the incident light and the z coordinate of the central portion 16a of the emitting portion 16 is dz, and y of the incident position on the incident surface 15 of the optical axis 25 of the incident light.
- the interval between the coordinate and the y coordinate of the central portion 16a of the emitting portion 16 is dy, and the interval between the z coordinate of the incident position on the incident surface 15 of the optical axis 25 of the incident light and the z coordinate of the emitting surface of the light source 25 is d0.
- the interval d0 is the same for all the light guide plates in the present embodiment, but may be different from each other.
- FIGS. 9A to 9D are cross-sectional views of the light guide plate 11 taken along lines AA, BB, CC, and DD in FIG. ing. Since the display portions 8a to 8d are located along the ridgeline 6, the distance dz is the largest in the first light guide plate 11a and the smallest in the fourth light guide plate 11d. For this reason, the z coordinates of the first to fourth display portions 8a to 8d are different from each other. On the other hand, since the light sources 25a to 25e are provided on the same light source substrate 21 installed horizontally, the relative positional relationship between the light sources 25a to 25e, the incident surface 15 of the light guide plate 11, and the emitting portion 16 is as follows.
- the first to fourth light guide plates 11a to 11d are all different.
- the interval dy is substantially the same in the first to fourth light guide plates 11a to 11d in the present embodiment, but differs in the y direction depending on the arrangement of the light sources.
- the ridge line 6 passing through each of the display portions 8a to 8d is indicated by a broken line.
- the first to fourth light guide plates 11a to 11d having the same shape are installed in the same direction, light does not pass through the display portions of some of the light guide plates, resulting in variations in brightness between the display portions.
- the first to third display units 8a to 8c shine with the same brightness
- the fourth display unit 8d shine with twice the brightness of the first to third display units 8a to 8c. Therefore, it is necessary to adjust the output for each of the light sources 25a to 25e.
- the incident surface angle ⁇ i is made different for each of the light guide plates 11a to 11d so that the optical axis 26 of the light guided through the light guide plates 11a to 11d passes through the emitting portion 16.
- the total refraction angle ⁇ g formed by the optical axis 25 of the incident light and the optical axis 26 of the light guided inside the light guide plate 11 is set to the first to fourth light guide plates 11a to 11d. For ⁇ g1, ⁇ g2, ⁇ g3, and ⁇ g4, respectively.
- the emitting portion 16 of the first light guide plate 11a projects forward, it is at the highest position, so the total refraction angle ⁇ g1 of the first light guide plate 11a needs to be minimized.
- the emission part 16 of the fourth light guide plate 11d is located at the rearmost position, it is at the lowest position, so the total refraction angle ⁇ g4 of the fourth light guide plate 11d needs to be maximized.
- the relationship of ⁇ g1 ⁇ g2 ⁇ g3 ⁇ g4 needs to be established.
- the first to fourth light guide plates 11a to 11d are configured such that the incident surface angle ⁇ i satisfies the relationship ⁇ i1 ⁇ i2 ⁇ i3 ⁇ i4.
- ⁇ i1 ⁇ ⁇ i4 are incident surface angle ⁇ i of the first to fourth light guide plate 11a-11d, respectively.
- the first incident surface angle ⁇ i1 is 14 degrees
- the second incident surface angle ⁇ i2 is 16 degrees
- the third incident surface angle ⁇ i3 is 18 degrees
- the fourth incident surface angle ⁇ i4 is 22 degrees.
- the incident surface angle ⁇ i is smaller and to increase the incident surface angle ⁇ i as the interval dy is larger. More generally, it is preferable to increase the incident surface angle ⁇ i as the total refraction angle ⁇ g, which is the included angle between the optical axis 25 of the incident light and the optical axis 26 of the light guided inside the light guide plate 11, increases. .
- the light incident on the incident surface 15 can be refracted at a predetermined refraction angle so that the optical axis 26 passes through the display portions 8a to 8d, and the display portions 8a to 8d can emit light with uniform brightness.
- the incident surface angle ⁇ i is determined by the relative positional relationship between the light sources 25a to 25e, the incident surfaces 15 of the light guide plates 11a to 11d, and the display units 8a to 8d, the incident surface angles ⁇ i of all the light guide plates 11a to 11d are determined. In some cases, the light guide plates 11a to 11d may differ from each other only in the incident surface angle ⁇ i.
- the total refraction angle ⁇ g is obtained for each of the light guide plates 11a to 11d from the positions of the light sources 25a to 25e, the positions of the display portions 8a to 8d, and the like.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
2 筺体
6 稜線
8a~8d 第1~第4の表示部
11,11a~11d 導光板
15 入射面
16 出射部
21 光源基板
24、24a~24e 第1~第5の光源
25,26 光軸
θg 総屈折角
θi 入射面角度(入射角)
Claims (10)
- 筐体と、
前記筺体の内部に設けられ、同一の方向を向いた光軸に沿って各々光を出射する複数の光源と、
前記筺体の内部に設けられ、前記複数の光源から出射した光を各々案内する複数の導光板と、を有し、
各前記導光板は、前記光源から出射した光が入射する入射面と、前記筺体の外面に露出して設けられた光の出射部と、を有し、
前記導光板を案内される光の光軸が前記出射部を通るように、前記入射面の法線と前記入射面に入射する光の光軸とがなす挟角である入射面角度が、いずれかの前記導光板と他のいずれかの前記導光板とで異なっている、電子装置。 - 前記入射面に入射する光の前記光軸と前記導光板内を案内される光の前記光軸とのなす挟角が大きいほど、前記入射面角度が大きい、請求項1に記載の電子装置。
- 前記複数の光源は同一の基板に取り付けられている、請求項1または2に記載の電子装置。
- 前記光軸は鉛直方向を向いている、請求項1から3のいずれか1項に記載の電子装置。
- 前記光源は面発光型の発光ダイオードである、請求項1から4のいずれか1項に記載の電子装置。
- 前記導光板はポリカーボネイトで形成されている、請求項1から5のいずれか1項に記載の電子装置。
- 複数の前記出射部は、投射レンズを備えた前記筺体の前面と前記筺体の上面との境界を画定する前記筺体の稜線に沿って配列している、請求項1から6のいずれか1項に記載の電子装置。
- 前記出射部は、前記稜線を跨いで、前記前面と前記上面とに面して設けられている、請求項7に記載の電子装置。
- 複数の前記出射部は、鉛直方向と前記筺体の奥行き方向のいずれかまたは双方で、互いに異なる位置に設けられている、請求項7または8に記載の電子装置。
- 筺体の内部に設けられた複数の光源から、同一の方向を向いた光軸に沿って各々光を出射させることと、
前記光源から出射した光を前記筺体の内部に設けられた複数の導光板の入射面で入射させ、各導光板の内部を案内し、前記筺体の外面に露出して設けられた出射部で出射させることと、を有し、
前記光源から出射した光は、前記導光板を案内される光の光軸が前記出射部を通るように、前記入射面の法線と前記入射面に入射する光の光軸とがなす挟角である入射面角度が、いずれかの前記導光板と他のいずれかの前記導光板とで異なるように入射される、電子装置における導光方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CN201180069289.7A CN103430228B (zh) | 2011-03-15 | 2011-03-15 | 电子装置和在电子装置中引导光的方法 |
PCT/JP2011/056016 WO2012124052A1 (ja) | 2011-03-15 | 2011-03-15 | 電子装置及び電子装置における導光方法 |
JP2013504441A JP5765789B2 (ja) | 2011-03-15 | 2011-03-15 | 電子装置及び電子装置における導光方法 |
US14/002,093 US20130335998A1 (en) | 2011-03-15 | 2011-03-15 | Electronic device and method of guiding light in the same |
Applications Claiming Priority (1)
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PCT/JP2011/056016 WO2012124052A1 (ja) | 2011-03-15 | 2011-03-15 | 電子装置及び電子装置における導光方法 |
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JP2016180933A (ja) * | 2015-03-25 | 2016-10-13 | アルプス電気株式会社 | 表示装置 |
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- 2011-03-15 CN CN201180069289.7A patent/CN103430228B/zh not_active Expired - Fee Related
- 2011-03-15 US US14/002,093 patent/US20130335998A1/en not_active Abandoned
- 2011-03-15 WO PCT/JP2011/056016 patent/WO2012124052A1/ja active Application Filing
- 2011-03-15 JP JP2013504441A patent/JP5765789B2/ja not_active Expired - Fee Related
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CN103430228B (zh) | 2015-12-16 |
CN103430228A (zh) | 2013-12-04 |
JPWO2012124052A1 (ja) | 2014-07-17 |
JP5765789B2 (ja) | 2015-08-19 |
US20130335998A1 (en) | 2013-12-19 |
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