JP4011339B2 - Light guide plate for lighting - Google Patents

Light guide plate for lighting Download PDF

Info

Publication number
JP4011339B2
JP4011339B2 JP2001388839A JP2001388839A JP4011339B2 JP 4011339 B2 JP4011339 B2 JP 4011339B2 JP 2001388839 A JP2001388839 A JP 2001388839A JP 2001388839 A JP2001388839 A JP 2001388839A JP 4011339 B2 JP4011339 B2 JP 4011339B2
Authority
JP
Japan
Prior art keywords
light guide
guide plate
illumination
light
panel
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
JP2001388839A
Other languages
Japanese (ja)
Other versions
JP2003187606A (en
Inventor
賢紀 玉井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kenwood KK
Original Assignee
Kenwood KK
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 Kenwood KK filed Critical Kenwood KK
Priority to JP2001388839A priority Critical patent/JP4011339B2/en
Publication of JP2003187606A publication Critical patent/JP2003187606A/en
Application granted granted Critical
Publication of JP4011339B2 publication Critical patent/JP4011339B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Liquid Crystal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Description

【0001】
【発明の属する技術分野】
この発明は電子機器等のパネルを内部から照明するためのパネル照明用導光板に関する。
【0002】
【従来の技術】
従来のパネルを内部から照明するためのパネル照明用導光板の例を図5により説明する。図に示す光源3、3…から放射された光が導光板10によりパネル9の照明部9a方向に導かれて照明部9aを照明する。
【0003】
光源3、3…は長方形の導光板10の1側面に1列に配置されている。導光板10には光源3、3…からの光の放射方向に対して直角方向に延びるV字形溝10a、10a…が設けられており、これにより均一に拡散された光が照明部9aを照明する。なお、図5において、V字形溝10a、10a…は簡略化されて描かれている。
【0004】
【発明が解決しようとする課題】
上記した従来の導光板では、パネルの照明される面の部分が円形であっても、導光板として長方形または正方形のものを使用する必要があり、パネル内部に大きいスペースが必要となっていた。
【0005】
また、導光板の側面に光源を配置するために、広い面を均一に照明するためには多数の光源を必要としていた。
【0006】
この発明は上記した点に鑑みてなされたものであって、その目的とするところは、少い光源により広い面を均一に照明することが可能であり、照明する面の形状に合わせて省スペース化された照明用導光板を提供することにある。
【0007】
【課題を解決するための手段】
この発明の照明用導光板は、電子機器のパネルの円形または楕円形の照明部を内部から照明するための照明用導光板であって、前記パネルの内側に配置されるプリント基板上に載置され、導光部の周囲が非方形に形成され、前記導光部下面中央部に光源を配置し、前記導光部上面は上方に凸状または球面状に形成され、前記光源からの光を前記照明部に向けて均一に拡散する同心形状の断面V字形の切り込みが設けられたものである。
【0008】
また、前記照明用導光板において、前記導光部の周囲につまみのボスを案内する案内部を設けたものである。
【0009】
【発明の実施の形態】
この発明の実施例である導光板を図面に基づいて説明する。図1はこの発明の第1の実施例である導光板の使用状態を示す断面図、図2は同使用状態を示す正面図である。
【0010】
図に示す2はプリント基板であり、プリント基板2の上には導光板1が配置されており、導光板1には上面が球面状の導光部1aが形成されている。導光部1aの下面中心部には凹み1cが形成されており、その凹み1cにはプリント基板2に設けられた光源3が配置されている。導光部1aの上面には同心円のV字形溝1b、1b…が形成されている。
【0011】
光源3から導光部1a内に放射された光はV字形溝1b、1b…により均一に拡散されパネル4の円形の照明部4aを照明する。なお、図2において、V字形溝10a、10a…は簡略化されて描かれている。
【0012】
導光部1aの周辺の形状は照明部4aに合わせて円形に形成されているために余分のスペースを必要とせず、また、導光部1aの下面の中心部に光源を1個配置するだけで円形の導光部1aを均一に照明することができる。
【0013】
図3はこの発明の第2の実施例である導光板の使用状態を示す正面図、図4は図3におけるA−A断面図である。この例では第1の実施例と同様にプリント基板2の上には導光板5が配置されており、導光板5には上面が球面状の導光部5aが形成されている。導光部5aの下面中心部には凹み5cが形成されており、その凹み5cにはプリント基板2に設けられた光源3が配置されている。導光部5aの上面には同心円のV字形溝5b、5b…が形成されている。
【0014】
光源3から導光部5a内に放射された光はV字形溝5b、5b…により均一に拡散されパネル6の円形の照明部6aとつまみ7、7…を照明する。すなわち、この例ではつまみ7、7…も内部から照明される。つまみ7、7…は図示していないヒンジにより弾性的に変位可能に支持されている。
【0015】
つまみ7、7…の下部に設けられたボス7a、7a…がプリント基板2の設けられたスイッチ8、8…を作動させる。ボス7aは導光板5に設けられた穴5d、5d…を挿通しており、つまみ7、7…は導光板5に案内されて動く。このように、導光板5をスイッチのガイドとして用い部品点数を削減することができる。
【0016】
実施例は以上のように構成されているが発明はこれに限られず、例えば、円形の導光部により円形の照明部を照明する代わりに楕円形の導光部により楕円形の照明部を照明してもよい。
【0017】
【発明の効果】
この発明の導光板によれば、導光部の形状をパネルの照明部の形状に合わせることができるので、パネル内部のスペースを有効に利用できる。
【0018】
また、長方形の導光板のように導光板側面に多数の光源を配列される必要がなく、1つの光源で均一な照明が可能となる。さらに、つまみやパネルだけでなく、LCDの照明にも用いることができる。
【図面の簡単な説明】
【図1】この発明の第1の実施例である導光板の使用状態を示す断面図である。
【図2】同使用状態を示す正面図である。
【図3】この発明の第2の実施例である導光板の使用状態を示す正面図である。
【図4】図3におけるA−A断面図である。
【図5】従来の導光板の使用状態の例を示す斜視図である。
【符号の説明】
1 導光板、1a 導光部、1b V字形溝、1c 凹み
2 プリント基板
3 光源
4 パネル、4a 照明部
5 導光板、5a 導光部、5b V字形溝、5c 凹み、5d 穴
6 パネル、6a 照明部、6b 穴
7 つまみ、7a ボス
8 スイッチ
9 パネル、9a 照明部
10 導光板、10a V字形溝
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a panel illumination light guide plate for illuminating a panel of an electronic device or the like from the inside.
[0002]
[Prior art]
An example of a panel light guide plate for illuminating a conventional panel from the inside will be described with reference to FIG. The light emitted from the light sources 3, 3... Shown in the drawing is guided by the light guide plate 10 toward the illumination unit 9a of the panel 9 to illuminate the illumination unit 9a.
[0003]
The light sources 3, 3... Are arranged in one row on one side of the rectangular light guide plate 10. The light guide plate 10 is provided with V-shaped grooves 10a, 10a,... Extending in a direction perpendicular to the radiation direction of the light from the light sources 3, 3,. To do. In FIG. 5, the V-shaped grooves 10a, 10a,...
[0004]
[Problems to be solved by the invention]
In the above-described conventional light guide plate, it is necessary to use a rectangular or square light guide plate even if the illuminated portion of the panel is circular, and a large space is required inside the panel.
[0005]
Further, since the light source is disposed on the side surface of the light guide plate, a large number of light sources are required to uniformly illuminate a wide surface.
[0006]
The present invention has been made in view of the above points, and an object of the present invention is to uniformly illuminate a wide surface with a small number of light sources, and to save space according to the shape of the illuminating surface. An object is to provide a light guide plate for illumination.
[0007]
[Means for Solving the Problems]
An illumination light guide plate according to the present invention is an illumination light guide plate for illuminating a circular or elliptical illumination portion of a panel of an electronic device from the inside, and is placed on a printed circuit board disposed inside the panel. is, around the light guide portion is formed on a non-rectangular, the light source is disposed on the light guide lower surface central portion, the light guide portion upper surface is formed in a convex or spherical upward, the light from the light source A concentric cross-section V-shaped cut is provided that diffuses uniformly toward the illumination section .
[0008]
In the illumination light guide plate, a guide portion for guiding a boss of a knob is provided around the light guide portion.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A light guide plate according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a use state of a light guide plate according to a first embodiment of the present invention, and FIG. 2 is a front view showing the use state.
[0010]
2 shown in the figure is a printed circuit board. A light guide plate 1 is disposed on the printed circuit board 2, and a light guide portion 1 a having a spherical upper surface is formed on the light guide plate 1. A recess 1c is formed at the center of the lower surface of the light guide portion 1a, and a light source 3 provided on the printed circuit board 2 is disposed in the recess 1c. Concentric V-shaped grooves 1b, 1b,... Are formed on the upper surface of the light guide portion 1a.
[0011]
The light emitted from the light source 3 into the light guide portion 1a is uniformly diffused by the V-shaped grooves 1b, 1b, etc., and illuminates the circular illumination portion 4a of the panel 4. In FIG. 2, the V-shaped grooves 10a, 10a,...
[0012]
Since the shape of the periphery of the light guide 1a is circular to match the illumination unit 4a, no extra space is required, and only one light source is disposed at the center of the lower surface of the light guide 1a. Thus, the circular light guide 1a can be illuminated uniformly.
[0013]
FIG. 3 is a front view showing a use state of a light guide plate according to a second embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line AA in FIG. In this example, the light guide plate 5 is disposed on the printed circuit board 2 as in the first embodiment, and the light guide plate 5 is formed with a light guide portion 5a having a spherical upper surface. A recess 5c is formed at the center of the lower surface of the light guide 5a, and the light source 3 provided on the printed circuit board 2 is disposed in the recess 5c. Concentric V-shaped grooves 5b, 5b,... Are formed on the upper surface of the light guide portion 5a.
[0014]
The light emitted from the light source 3 into the light guide portion 5a is uniformly diffused by the V-shaped grooves 5b, 5b... Illuminates the circular illumination portion 6a of the panel 6 and the knobs 7, 7. That is, in this example, the knobs 7, 7... Are also illuminated from the inside. The knobs 7, 7... Are supported by a hinge (not shown) so as to be elastically displaceable.
[0015]
The bosses 7a, 7a ... provided below the knobs 7, 7 ... operate the switches 8, 8 ... provided on the printed circuit board 2. The boss 7a is inserted through holes 5d, 5d... Provided in the light guide plate 5, and the knobs 7, 7. Thus, the number of parts can be reduced by using the light guide plate 5 as a switch guide.
[0016]
The embodiment is configured as described above, but the invention is not limited to this. For example, instead of illuminating the circular illumination unit with the circular light guide unit, the elliptical illumination unit is illuminated with the elliptical light guide unit. May be.
[0017]
【The invention's effect】
According to the light guide plate of the present invention, the shape of the light guide portion can be matched with the shape of the illumination portion of the panel, so that the space inside the panel can be used effectively.
[0018]
Further, it is not necessary to arrange a large number of light sources on the side surface of the light guide plate as in the case of a rectangular light guide plate, and uniform illumination is possible with one light source. Furthermore, it can be used not only for knobs and panels but also for LCD lighting.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a usage state of a light guide plate according to a first embodiment of the present invention.
FIG. 2 is a front view showing the same use state.
FIG. 3 is a front view showing a usage state of a light guide plate according to a second embodiment of the present invention.
4 is a cross-sectional view taken along line AA in FIG.
FIG. 5 is a perspective view showing an example of a usage state of a conventional light guide plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Light guide plate, 1a Light guide part, 1b V-shaped groove, 1c Indentation 2 Printed circuit board 3 Light source 4 Panel, 4a Illumination part 5 Light guide plate, 5a Light guide part, 5b V-shaped groove, 5c Indentation, 5d hole 6 Panel, 6a Illumination part, 6b hole 7 knob, 7a boss 8 switch 9 panel, 9a illumination part 10 light guide plate, 10a V-shaped groove

Claims (2)

電子機器のパネルの円形または楕円形の照明部を内部から照明するための照明用導光板であって、
前記パネルの内側に配置されるプリント基板上に載置され、
導光部の周囲が非方形に形成され、前記導光部下面中央部に光源を配置し、前記導光部上面は上方に凸状または球面状に形成され、
前記光源からの光を前記照明部に向けて均一に拡散する同心形状の断面V字形の切り込みが設けられた照明用導光板。
An illumination light guide plate for illuminating a circular or elliptical illumination part of an electronic device panel from the inside,
Placed on a printed circuit board placed inside the panel,
The periphery of the light guide part is formed in a non-square shape, a light source is disposed in the center part of the lower surface of the light guide part, and the upper surface of the light guide part is formed in a convex or spherical shape upward,
An illumination light guide plate provided with concentric V-shaped cuts that uniformly diffuse light from the light source toward the illumination unit .
前記導光部の周囲につまみのボスを案内する案内部を設けた請求項1の照明用導光板。The light guide plate for illumination according to claim 1, wherein a guide portion for guiding a boss of a knob is provided around the light guide portion.
JP2001388839A 2001-12-21 2001-12-21 Light guide plate for lighting Expired - Fee Related JP4011339B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001388839A JP4011339B2 (en) 2001-12-21 2001-12-21 Light guide plate for lighting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001388839A JP4011339B2 (en) 2001-12-21 2001-12-21 Light guide plate for lighting

Publications (2)

Publication Number Publication Date
JP2003187606A JP2003187606A (en) 2003-07-04
JP4011339B2 true JP4011339B2 (en) 2007-11-21

Family

ID=27597217

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001388839A Expired - Fee Related JP4011339B2 (en) 2001-12-21 2001-12-21 Light guide plate for lighting

Country Status (1)

Country Link
JP (1) JP4011339B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109270735B (en) * 2018-10-25 2021-08-17 厦门天马微电子有限公司 Backlight module and display device

Also Published As

Publication number Publication date
JP2003187606A (en) 2003-07-04

Similar Documents

Publication Publication Date Title
JP6367308B2 (en) Key module for keyboard key and method for manufacturing the same
US7432460B2 (en) Button assembly with status indicator and programmable backlighting
US5130897A (en) Light guide for a telephone dial
US7067753B1 (en) Keypad light guide
EP2664979A1 (en) Illumination module and illuminated keyboard having the same
KR960032270A (en) Control panel
US7629547B2 (en) Illuminating of an electrical device
JP2006236853A (en) Light guide and lighting system equipped with light guide
JP2005032703A (en) Lighting device, and light input device
JP2015022799A (en) Switch device
JP4011339B2 (en) Light guide plate for lighting
WO2013102996A1 (en) Vehicle interior illumination device
US7690828B2 (en) Illumination device
JP6925373B2 (en) Operation unit structure and electronic devices equipped with this
JP2005268165A (en) Lighted key switch
JPH02155136A (en) Lighting type push-button switch
JP4446844B2 (en) Push button device in electronic equipment
JPH11338394A (en) Illuminator of electronic equipment and case structure thereof
JP2633925B2 (en) Keyboard character lighting device
JP2001251401A (en) Portable terminal
JP2004227897A (en) Light guide structure of push-button switch
JPH05128934A (en) Display structure of key switch
JPS6123227A (en) Keyboard device
JPH05167659A (en) Lighting device for key operation section
JP2003257283A (en) Structure of operation element for operation panel

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20040402

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070109

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20070309

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20070807

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20070905

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100914

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110914

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120914

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120914

Year of fee payment: 5

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120914

Year of fee payment: 5

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120914

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130914

Year of fee payment: 6

LAPS Cancellation because of no payment of annual fees