CN101493543A - Ring shaped light guide and electronic equipment with the same - Google Patents

Abstract

Translated fromChinese

本发明提供一种不需要较大的设置空间就可以均匀照明的环状光导件及具有该光导件的电子设备。便携式录音机包括主体盒和麦克风。在基板上安装有左LED芯片及右LED芯片。在主体盒上形成有显示窗。环状光导件包括左入射部、右入射部、光导部。左入射部与左LED芯片相对，右入射部与右LED芯片相对。光导部的射出端与显示窗嵌合。在光导部中形成有使在光导部内引导的光朝向射出端反射的射出用反射面。在光导部中形成有光导用反射面。射出用反射面被形成为，到各入射部的距离越长，倾斜角度越大，其宽度越大。

The invention provides a ring-shaped light guide that can illuminate uniformly without requiring a large installation space and electronic equipment with the light guide. A portable recorder consists of a main body box and a microphone. A left LED chip and a right LED chip are mounted on the substrate. A display window is formed on the main body case. The annular light guide includes a left incident part, a right incident part and a light guide part. The left incident part is opposite to the left LED chip, and the right incident part is opposite to the right LED chip. The emitting end of the light guide part is fitted with the display window. A reflective surface for emission that reflects light guided in the light guide toward an emission end is formed in the light guide. A reflective surface for a light guide is formed in the light guide part. The reflective surface for emission is formed such that the longer the distance to each incident portion, the larger the inclination angle, and the larger the width.

Description

Translated fromChinese

环状光导件及具有其的电子设备Annular light guide and electronic device with same

技术领域technical field

本发明涉及一种在示出电子设备的动作状态的显示装置等中使用、用于环状发光的环状光导件及具有该光导件的电子设备。The present invention relates to a ring-shaped light guide for use in a display device or the like showing an operating state of an electronic device for ring-shaped light emission, and an electronic device having the light guide.

背景技术Background technique

在录音装置、个人计算机、移动电话等电子设备中设置有各种显示装置，以显示电子设备的动作状态等。作为该显示装置的一例，例如包括以包围按压按钮的方式环状发光的装置。在该显示装置中，为了引导来自发光体的光，使用环状的光导件。Various display devices are installed in electronic equipment such as recording devices, personal computers, and mobile phones to display the operating status of the electronic equipment and the like. An example of such a display device includes, for example, a device that emits light in a ring so as to surround a push button. In this display device, an annular light guide is used to guide the light from the light emitter.

作为现有的光导件，如专利文献1所示公知有如下装置：在环状的光导件上设置向其切线方向延伸的2个入光部，在这些入光部配置光源。从各个入光部入射的光在光导件内反射，同时逆向进入大致整周，在其间从作为光导件的上表面的环状的射出端射出，产生光环。As a conventional light guide, as disclosed in Patent Document 1, there is known a device in which two light incident portions extending tangentially are provided on a ring-shaped light guide, and light sources are arranged in these light incident portions. The light incident from each light incident part is reflected in the light guide, and enters substantially the entire circumference in the reverse direction, and is emitted from the ring-shaped output end serving as the upper surface of the light guide to generate a halo.

此外，在专利文献2中记载了如下光导件：在环状的主体上连接大致直线状延伸的光导部，整体呈板状。主体由于内周的中心和外周的中心偏离而呈偏心的环状。在光导部的端面上配置有一个光源。In addition, Patent Document 2 describes a light guide in which a light guide portion extending substantially linearly is connected to a ring-shaped main body, and has a plate shape as a whole. The main body has an eccentric annular shape due to the offset of the center of the inner circumference and the center of the outer circumference. A light source is disposed on the end face of the light guide.

专利文献1：JP特许第3770154号Patent Document 1: JP Patent No. 3770154

专利文献2：JP特开2006-179379号公报Patent Document 2: JP Unexamined Publication No. 2006-179379

为了降低成本而使用一个或两个光源，但此时也需要使光环的各部保持均匀的亮度。在上述专利文献1的光导件中，为了形成均匀亮度的光环，在光导件内混入了漫反射物质，或以预定的间距形成越远离光源越长的倾斜的狭缝，通过各个狭缝将在圆周方向进入的光向射出端反射。但是，光的强度与距离的乘方成反比地衰减，因此仅通过混入漫反射物质难以获得均匀的照明。此外在形成狭缝的情况下，由于多个狭缝并排，因此如果经过几个狭缝反射，则经过狭缝部分的光的强度会急剧下降。因此还是难以获得均匀的照明。In order to reduce costs, one or two light sources are used, but at this time it is also necessary to maintain uniform brightness in each part of the light ring. In the light guide of the above-mentioned Patent Document 1, in order to form a halo of uniform brightness, a diffuse reflective material is mixed in the light guide, or inclined slits are formed at predetermined intervals and become longer as they are farther away from the light source. The light entering in the circumferential direction is reflected toward the exit end. However, the intensity of light attenuates inversely proportional to the power of the distance, so it is difficult to obtain uniform illumination only by mixing diffuse reflective substances. In addition, when forming slits, since a plurality of slits are arranged side by side, the intensity of the light passing through the slit portion will drop sharply if it is reflected by several slits. It is therefore still difficult to obtain uniform illumination.

此外在专利文献2中使用偏心的板状的环，到光源的距离越长，环的宽度越窄，光密度越高。但是在该专利文献2中，需要使光导部附近的宽度非常大，因此需要很大的设置空间，在配置上受到制约。In addition, in Patent Document 2, an eccentric plate-shaped ring is used, and the longer the distance to the light source, the narrower the ring width and the higher the optical density. However, in this patent document 2, since the width near the light guide part needs to be made very large, a large installation space is required, and arrangement|positioning is restricted.

发明内容Contents of the invention

本发明为了解决上述问题，其目的在于提供一种不需要较大的设置空间的环状光导件及具有该光导件的电子设备。In order to solve the above-mentioned problems, the present invention aims to provide an annular light guide that does not require a large installation space, and an electronic device including the light guide.

为了实现上述目的，本发明的环状光导件，将来自发光体的光向形成于外装面板的显示窗引导，其特征在于，包括：入射部，与上述发光体相对；环状的光导部，引导从上述入射部入射的光；射出端，使经过了上述光导部的光从上述显示窗射出；和射出用反射面，在上述光导部的整周形成，使在上述光导部内部引导的光朝向上述射出端反射，并且与到上述入射部的距离相对应地扩大宽度。另外，作为构成环状光导件的材料，包括丙烯、AS(丙烯腈苯乙烯)等。In order to achieve the above object, the ring-shaped light guide of the present invention guides the light from the illuminant to the display window formed on the exterior panel, and is characterized in that it includes: an incident part, opposite to the above-mentioned illuminant; an annular light guide part, guide the light incident from the above-mentioned incident part; emit the light passing through the above-mentioned light-guiding part from the above-mentioned display window; It is reflected toward the above-mentioned emission end, and the width is enlarged according to the distance from the above-mentioned incident portion. In addition, as a material constituting the annular light guide, acrylic, AS (acrylonitrile styrene), and the like are included.

此外优选的是，上述射出用反射面通过增大倾斜角度来扩大宽度。In addition, it is preferable that the width of the reflection surface for emission is increased by increasing the inclination angle.

进而优选的是，向上述入射部入射来自上述发光体的光，该发光体设置在上述显示窗的外侧，向与来自上述显示窗的射出方向大致平行的方向发光，在上述光导部中形成有使入射到上述入射部的光朝向上述射出用反射面反射的光导用反射面。Further preferably, light from the illuminant is incident on the incident portion, the illuminant is disposed outside the display window, emits light in a direction approximately parallel to the direction of emission from the display window, and a light guide is formed in the light guide portion. A reflective surface for a light guide that reflects light incident on the incident portion toward the reflective surface for emission.

此外优选的是，在上述光导部中形成有用于收纳按压按钮的按钮用开口。Furthermore, it is preferable that an opening for a button for accommodating a push button is formed in the light guide portion.

进而本发明的电子设备，其特征在于，包括：具有开口的外装面板；嵌合到上述开口内的上述环状光导件；和能够按压地收纳在上述环状光导件内的按压按钮。另外，作为上述电子设备，包括录音机、个人计算机、CD播放器、DVD播放器等。Furthermore, the electronic device of the present invention is characterized by comprising: an exterior panel having an opening; the ring-shaped light guide fitted into the opening; and a push button housed in the ring-shaped light guide so as to be depressible. Moreover, as said electronic equipment, a recorder, a personal computer, a CD player, a DVD player, etc. are included.

根据本发明的环状光导件，形成于光导部并向射出端反射的射出用反射面的宽度，与到入射部的距离相对应地扩大，因此可以在整周使来自显示窗的射出量均匀。此外在狭窄的设置中间中也可以设置。According to the ring-shaped light guide of the present invention, the width of the reflection surface for emission formed on the light guide portion and reflected toward the emission end is enlarged corresponding to the distance from the entrance portion, so that the amount of emission from the display window can be made uniform over the entire circumference. . In addition, it can also be installed in the middle of a narrow setting.

此外，射出用反射面通过增大倾斜角度来扩大宽度，因此光导部在直径方向上的厚度不变。In addition, since the width of the reflection surface for emission is increased by increasing the inclination angle, the thickness of the light guide portion in the radial direction does not change.

附图说明Description of drawings

图1是表示实施了本发明的便携式录音机的平面图。Fig. 1 is a plan view showing a portable recorder embodying the present invention.

图2是表示录音/录音暂时停止按钮、左LED芯片、右LED芯片和环状光导件的分解透视图。2 is an exploded perspective view showing a recording/recording temporary stop button, a left LED chip, a right LED chip, and a ring-shaped light guide.

图3(A)是图1的A-A分解剖视图，(B)是组装状态的A-A剖视图。Fig. 3(A) is an exploded cross-sectional view of A-A in Fig. 1, and (B) is a cross-sectional view of A-A in an assembled state.

图4(A)是图1的B-B剖视图，(B)是C-C剖视图，(C)是D-D剖视图。Fig. 4(A) is a B-B sectional view of Fig. 1 , (B) is a C-C sectional view, and (C) is a D-D sectional view.

具体实施方式Detailed ways

如图1所示，便携式录音机2包括主体盒3和麦克风4。麦克风4设置有两个。麦克风4中，用于将收集到的声音变换为电信号的变换器5被收纳在麦克盒6中。As shown in FIG. 1 , the portable recorder 2 includes amain body case 3 and a microphone 4 . Microphone 4 is provided with two. In the microphone 4 , atransducer 5 for converting collected sound into an electric signal is accommodated in a microphone case 6 .

在主体盒3的内部设置有基板7，在基板7上安装有用于控制便携式录音机2的驱动的CPU 8。The inside of themain body box 3 is provided with asubstrate 7, and aCPU 8 for controlling the driving of the portable recorder 2 is installed on thesubstrate 7.

在主体盒3的内部可装卸地收纳有SD卡9，来自麦克风4的电信号作为声音数据记录在SD卡9中。AnSD card 9 is detachably housed inside themain body case 3, and an electric signal from the microphone 4 is recorded in theSD card 9 as voice data.

在主体盒3上设置有LCD 11、录音/录音暂时停止按钮(以下称为录音按钮)12、重放/重放暂时停止按钮(以下称为重放按钮)13、停止按钮14、菜单按钮15、轻推转盘(Jog Dial)16、输出端子17。另外，各按钮12～15由按压方式的按钮构成。LCD 11, recording/recording temporary stop button (hereinafter referred to as recording button) 12, replay/replaying temporary stop button (hereinafter referred to as replay button) 13,stop button 14,menu button 15 are provided onmain body box 3 , Jog Dial (Jog Dial) 16,output terminal 17. In addition, each of thebuttons 12 to 15 is constituted by a push-type button.

按压重放按钮13后，进行SD卡9内记录的声音数据的重放控制，在重放控制中按压重放按钮13后，进行重放暂时停止控制。重放的录音数据被传输到输出端子17。如果在输出端子17安装扬声器，则可以听到重放的声音。When theplayback button 13 is pressed, playback control of the audio data recorded in theSD card 9 is performed, and when theplayback button 13 is pressed during the playback control, playback pause control is performed. The reproduced recorded data is transmitted to theoutput terminal 17 . If a speaker is installed at theoutput terminal 17, the reproduced sound can be heard.

按压菜单按钮15后，在LCD 11上显示用于进行各种设定的设定画面。在LCD 11上除了显示设定画面之外，还显示用于选择重放的声音数据的选择画面。操作轻推转盘16进行设定及选择。此外在主体盒3上设置有快进按钮、倒退按钮等各种按钮。When themenu button 15 is pressed, a setting screen for performing various settings is displayed on theLCD 11. In addition to displaying the setting screen on theLCD 11, a selection screen for selecting audio data to be reproduced is also displayed. Operate thejog dial 16 for setting and selection. In addition, various buttons such as a fast-forward button and a rewind button are provided on themain body box 3 .

如图2及图3所示，在基板7上安装有左LED芯片21及右LED芯片22。各LED芯片21、22设置在显示窗3a的外侧，向与来自显示窗3a的射出方向大致平行的方向发光。As shown in FIGS. 2 and 3 , theleft LED chip 21 and theright LED chip 22 are mounted on thesubstrate 7 . EachLED chip 21, 22 is provided outside thedisplay window 3a, and emits light in a direction substantially parallel to the direction of emission from thedisplay window 3a.

各LED芯片21、22可变化为点灯状态、闪烁状态、熄灯状态，通过CPU 8单独地控制。作为这些LED芯片21、22，可以使用发出白色光的，也可以使用发出3原色光中的一个的。EachLED chip 21, 22 can be changed into a lighting state, a blinking state, and a light-off state, which are controlled separately by theCPU 8. As theseLED chips 21 and 22, those emitting white light may be used, and those emitting light of one of three primary colors may be used.

在基板7上安装有录音开关23。按压录音按钮12后，录音开关23接通，向CPU 8输入接通信号。CPU 8从录音开关23输入接通信号后，进行开始麦克风4的录音的控制，如果在录音控制中输入接通信号，则进行录音暂时停止控制。Arecording switch 23 is mounted on thesubstrate 7 . After pressing therecording button 12, therecording switch 23 is connected, and the connection signal is input to theCPU 8. After theCPU 8 inputs an ON signal from therecording switch 23, it performs control to start the recording of the microphone 4, and if the ON signal is input during the recording control, it performs a temporary stop control of the recording.

CPU 8在录音控制中使各LED芯片21、22点灯，在录音暂时停止控制中使各LED芯片21、22闪烁。TheCPU 8 turns on eachLED chip 21, 22 during recording control, and blinks eachLED chip 21, 22 during recording pause control.

在主体盒3上形成有显示窗3a，在该显示窗3a中插入环状光导件25。在主体盒3的内面设置有两个用于安装环状光导件25的安装凸台3b。Adisplay window 3 a is formed on themain body case 3 , and an annularlight guide 25 is inserted into thedisplay window 3 a. Twoinstallation bosses 3 b for installing the ring-shapedlight guide 25 are provided on the inner surface of themain body box 3 .

环状光导件25包括左入射部25a、右入射部25b、光导部25c，通过透过光的透明树脂(例如丙烯)成形。左入射部25a与左LED芯片21相对，右入射部25b与右LED芯片22相对。在光导部25c的上表面设置射出端25d，射出端25d与主体盒3的显示窗3a嵌合。The annularlight guide 25 includes a left incident portion 25a, a right incident portion 25b, and alight guide portion 25c, and is formed of a transparent resin (for example, acrylic) that transmits light. The left incident part 25 a faces theleft LED chip 21 , and the right incident part 25 b faces theright LED chip 22 . Anemission end 25d is provided on the upper surface of thelight guide portion 25c, and theemission end 25d is fitted into thedisplay window 3a of themain body case 3 .

光导部25c形成为环状，对向各入射部25a、25b入射的光进行反射的同时，沿着环状的形状在圆周方向上导光。在光导部25c的内周面上形成有射出用反射面25e，以使在光导部25c的内部在圆周方向上引导的光朝向射出端25d反射。入射到射出端25d的光从显示窗3a射出。Thelight guide part 25c is formed in an annular shape, and guides the light in the circumferential direction along the annular shape while reflecting the light incident on the respective incident parts 25a and 25b. An emissionreflective surface 25e is formed on the inner peripheral surface of thelight guide portion 25c so as to reflect light guided in the circumferential direction inside thelight guide portion 25c toward theemission end 25d. The light incident on theoutput end 25d is output from thedisplay window 3a.

在光导部25c的外周面上形成有光导用反射面25f。光导用反射面25f形成在各入射部25a、25b的上方，对入射到各入射部25a、25b的光进行反射。形成有各入射部25a、25b的部分的射出用反射面25e的宽度比光导用反射面25f的宽度窄，因此由光导用反射面25f反射的光中仅一部分光入射到形成有各入射部25a、25b的部分的射出用反射面25e上。由光导用反射面25f反射的光中、没有入射到形成有各入射部25a、25b的部分的射出用反射面25e上的光，在光导部25c的内部在圆周方向上导光。25 f of reflection surfaces for light guides are formed in the outer peripheral surface of thelight guide part 25c. Thereflective surface 25f for a light guide is formed above each incident part 25a, 25b, and reflects the light incident into each incident part 25a, 25b. Since the width of thereflection surface 25e for emission at the portion where the incident portions 25a and 25b are formed is narrower than that of thereflective surface 25f for the light guide, only a part of the light reflected by thereflective surface 25f for the light guide is incident on the portion where the respective incident portions 25a are formed. , 25b on thereflective surface 25e for emission. Of the light reflected by the light guidereflective surface 25f, the light that does not enter the outputreflective surface 25e where the incident portions 25a, 25b are formed is guided in the circumferential direction inside thelight guide portion 25c.

在光导部25c上设置：形成有安装凹部25g的安装凸台25h、和定位凸台25i。安装凸台25h设置两个，在各自的安装凹部25g中插入主体盒3的安装凸台3b。Thelight guide part 25c is provided with: the attachment boss|hub 25h in which the attachment recessedpart 25g was formed, and the positioning boss|hub 25i. Two mountingbosses 25h are provided, and the mountingbosses 3b of themain body case 3 are inserted into the respective mountingrecesses 25g.

在光导部25c上形成有开口25j。将录音按钮12插入到开口25j中后，录音按钮12可按压地收纳在环状光导件25内。Anopening 25j is formed in thelight guide portion 25c. After therecording button 12 is inserted into theopening 25j, therecording button 12 is housed in the annularlight guide 25 so as to be depressible.

如图3及图4所示，射出用反射面25e被形成为，如果到各入射部25a、25b的距离变长(图4(A)→图4(B)→图4(C))，则倾斜角度变大，其宽度变大。更详细地说，射出用反射面25e被形成为，随着从各入射部25a、25b离开，倾斜角度变陡，射出用反射面25e的面积变大。另外，图3是图1的A-A剖视图，图4(A)是B-B剖视图，图4(B)是C-C剖视图，图4(C)是D-D剖视图。另外图3(B)、图4(A)～(C)在环状光导件25处没有画阴影。As shown in Fig. 3 and Fig. 4, thereflective surface 25e for emission is formed so that if the distance to each incident part 25a, 25b becomes longer (Fig. 4(A) → Fig. 4(B) → Fig. 4(C)), Then the inclination angle becomes larger, and its width becomes larger. More specifically, thereflective surface 25e for emission is formed such that the inclination angle becomes steeper as the distance from each incident portion 25a, 25b increases, and the area of thereflective surface 25e for emission becomes larger. In addition, FIG. 3 is a sectional view of A-A of FIG. 1 , FIG. 4(A) is a sectional view of B-B, FIG. 4(B) is a sectional view of C-C, and FIG. 4(C) is a sectional view of D-D. In addition, FIG. 3(B) and FIG. 4(A)-(C) do not draw shadows at the annularlight guide 25 .

如图2及图3所示，将环状光导件25安装到主体盒3上时，将安装凸台3b插入到安装凹部25g中。将安装凸台3b插入到安装凹部25g中后，环状光导件25在上下方向(E方向)及左右方向(F方向)被定位，射出端25d嵌合到主体盒3的显示窗3a中。并且，在开口25j中插入录音按钮12。As shown in FIGS. 2 and 3 , when mounting the annularlight guide 25 to themain body case 3 , the mountingboss 3 b is inserted into the mountingrecess 25 g. After theinstallation boss 3b is inserted into theinstallation recess 25g, the annularlight guide 25 is positioned in the up-down direction (E direction) and the left-right direction (F direction), and theemitting end 25d is fitted into thedisplay window 3a of themain body case 3 . And, therecording button 12 is inserted into theopening 25j.

如图4(A)所示，将基板7安装到主体盒3上后，安装凸台25h及定位凸台25i与基板7抵接，环状光导件25在前后方向(图4中的上下方向)被定位。As shown in FIG. 4(A), after thesubstrate 7 is installed on themain body box 3, the mountingboss 25h and thepositioning boss 25i abut against thesubstrate 7, and the ring-shapedlight guide 25 is positioned in the front-back direction (the up-down direction in FIG. 4 ). ) is positioned.

接下来说明便携式录音机2的作用。录音按钮12被按压后，从录音开关23向CPU 8输入接通信号。CPU 8响应接通信号被输入，开始麦克风4的录音，并且使左LED芯片21及右LED芯片22点灯。Next, the operation of the portable recorder 2 will be described. After therecording button 12 is pressed, an ON signal is input from therecording switch 23 to theCPU 8. TheCPU 8 responds to the input of the ON signal, starts recording by the microphone 4, and lights up theleft LED chip 21 and theright LED chip 22.

如图3(B)所示，从各LED芯片21、22入射到各入射部25a、25b的光被光导用反射面25f反射。As shown in FIG. 3(B), the light incident from eachLED chip 21, 22 to each incident portion 25a, 25b is reflected by the light guidereflective surface 25f.

被光导用反射面25f反射的光中仅一部分光入射到形成有各入射部25a、25b的部分的射出用反射面25e上。因此，从形成有各入射部25a、25b的部分的射出端25d射出的光量，与来自各LED芯片21、22的光量相比减少。被光导用反射面25f反射的光中、没有入射到形成有各入射部25a、25b的部分的射出用反射面25e上的光，在光导部25c的内部在圆周方向上被导光。Of the light reflected by thereflective surface 25f for a light guide, only a part of the light is incident on thereflective surface 25e for emission at the portion where the incident portions 25a and 25b are formed. Therefore, the amount of light emitted from theoutput end 25d of the portion where the respective incident portions 25a, 25b are formed is smaller than the amount of light from therespective LED chips 21, 22 . Of the light reflected by the light guidereflective surface 25f, the light that does not enter the outputreflective surface 25e where the incident portions 25a and 25b are formed is guided in the circumferential direction inside thelight guide portion 25c.

如图4(A)～(C)所示，在光导部25的内部在圆周方向上引导的光，被射出用反射面25e朝向射出端25d反射。并且从射出端25d射出的光从显示窗3a射出。As shown in FIGS. 4(A) to (C), the light guided in the circumferential direction inside thelight guide 25 is reflected toward theemission end 25d by thereflection surface 25e for emission. And the light emitted from the emittingend 25d is emitted from thedisplay window 3a.

射出用反射面25e的宽度，到各入射部25a、25b的距离越长(图4(A)→图4(B)→图4(C))则越大。在本实施方式中，从各入射部25a、25b离开最远的图4(C)的部分，即图1中的D-D剖面的部分的射出用反射面25e，倾斜角度最大，宽度也最大。The width of thereflective surface 25e for emission becomes larger as the distance to each incident portion 25a, 25b becomes longer ( FIG. 4(A) → FIG. 4(B) → FIG. 4(C)). In this embodiment, the portion of FIG. 4(C) farthest from each incident portion 25a, 25b, that is, the portion of the D-D section in FIG.

射出用反射面25e的宽度变大时，入射到射出用反射面25e的光量增加，因此射出用反射面25e的反射量增加。从而，在到各入射部25a、25b的距离变长、在光导部25c的内部在圆周方向上引导的光的强度衰减的部分，也可以抑制从射出端25d射出的光量的减少。通过使射出用反射面25e的形状为适当的形状，可以使从射出端25d射出的光量在整周均匀。When the width of thereflective surface 25e for emission increases, the amount of light incident on thereflective surface 25e for emission increases, so the reflection amount of thereflective surface 25e for emission increases. Therefore, the decrease in the amount of light emitted from theoutput end 25d can also be suppressed at a portion where the distance to each incident portion 25a, 25b becomes longer and the intensity of light guided in the circumferential direction inside thelight guide portion 25c attenuates. By setting the shape of thereflective surface 25e for emission to an appropriate shape, the amount of light emitted from theemission end 25d can be made uniform over the entire circumference.

此外，从射出端25d射出的光量均匀时，与形成有各入射部25a、25b的部分的射出端25d的光量一致。在本实施方式中，使该部分的射出用反射面25e的倾斜角度最小，使其宽度最窄，从而从射出端25d射出的光量与从各LED芯片21、22入射的光量相比减少，因此可以容易地进行均匀化。In addition, when the amount of light emitted from theoutput end 25d is uniform, it is equal to the amount of light at theoutput end 25d of the portion where the incident portions 25a and 25b are formed. In this embodiment, the angle of inclination of thereflective surface 25e for emission in this part is minimized, and its width is narrowed, so that the amount of light emitted from the emittingend 25d is reduced compared with the amount of light incident from eachLED chip 21, 22, so Homogenization can be easily performed.

另外在上述实施方式中，通过增大倾斜角度来扩大射出用反射面25e的宽度，但也可以不改变倾斜角度，通过增加光导部25c在直径方向上的厚度来扩大宽度。In the above embodiment, the width of theemission reflection surface 25e is increased by increasing the inclination angle, but the width may be increased by increasing the thickness of thelight guide portion 25c in the radial direction without changing the inclination angle.

此外，使来自LED芯片的光以与基板7平行的朝向入射到环状光导件25时，也可以实施本发明。此时，可以不设置光导用反射面25f。In addition, the present invention can also be implemented when the light from the LED chip is made to enter the ring-shapedlight guide 25 in a direction parallel to thesubstrate 7 . In this case, thereflective surface 25f for a light guide may not be provided.

进而，LED芯片的个数也可以为1个或3个。对应于其个数，射出用反射面25e的形状也改变。Furthermore, the number of LED chips may be one or three. The shape of thereflective surface 25e for emission also changes according to the number.

Claims (5)

1. ring shaped light guide, the light of the self-luminous body display window of adorning panel to being formed at outside guides in the future, it is characterized in that, comprising:

The incident section, relative with above-mentioned luminophor;

The light guide portion of ring-type, guiding is from the light of above-mentioned incident section incident;

Ejecting end makes the light that has passed through above-mentioned light guide portion penetrate from above-mentioned display window; With

Penetrate and use reflecting surface, form, make at the inner light that guides of above-mentioned light guide portion and reflect, and enlarge width accordingly with distance to above-mentioned incident section towards above-mentioned ejecting end at the complete cycle of above-mentioned light guide portion.

2. ring shaped light guide according to claim 1 is characterized in that,

Above-mentioned ejaculation enlarges width with reflecting surface by increasing the angle of inclination.

3. ring shaped light guide according to claim 1 and 2 is characterized in that,

To the light of above-mentioned incident section incident from above-mentioned luminophor, this luminophor is arranged on the outside of above-mentioned display window, to luminous with direction from the ejaculation direction almost parallel of above-mentioned display window,

In above-mentioned light guide portion, be formed with and make the light that incides above-mentioned incident section towards the photoconduction reflecting surface of above-mentioned ejaculation with the reflecting surface reflection.

4. according to each the described ring shaped light guide in the claim 1～3, it is characterized in that, in above-mentioned light guide portion, be formed with the button opening that is used to take in pressing button.

5. an electronic equipment is characterized in that, comprising:

Outer dress panel with opening;

Be fitted to the described ring shaped light guide of claim 4 in the above-mentioned opening; With

Can be accommodated in the pressing button in the above-mentioned ring shaped light guide with pushing.

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