throbber
(19) Japan Patent Office (JP)
`
`(12) Publication of Utility Model Application (U)
`
`(11) Publication Number of Utility Model Application
`
`H5-25602
`
`(43) Date of Publication of Application
`
`April 2, 1993
`
`5
`
`----------------------------------------------------------
`
`(51) Int. Cl.5 ID Symbol
`
`Interoffice Reference Number FI
`
`Technology Indicating Section
`
`F 21 Q 1/00
`
`
`
`
`
`10
`
`F21 V 8/00
`
`
`
`
`
`
`
`G02 B 6/00 331
`
`G03 B 15/06
`
`
`
`
`
`
`
`
`
`
`
`
`
`E 9032-3K
`
`N 9032-3K
`
`M 2113-3K
`
` 9017-2K
`
` 7316-2K
`
`Request for Examination not made Number of Claims 1
`
`(3 pages in total) Continue to Final Page
`
`15
`
`----------------------------------------------------------
`
`(21) Utility Model Application Number H3-81873
`
`(22) Application Date September 13, 1991
`
`(71) Applicant Koito Manufacturing Co., Ltd.
`
`
`
`
`
`
`
`8-3, Takanawa 4-chome, Minato-ku, Tokyo
`
`20
`
`(72) Inventor Tomofumi KATASE
`
`
`
`
`
`
`
`
`
`c/o Koito Manufacturing Co., Ltd., Shizuoka Plant
`
`
`
`500, Kitawaki, Shimizu-shi, Shizuoka-ken
`
`(74) Agent
`
`Patent Attorney Akio SUZUKI
`
`----------------------------------------------------------
`
`25
`
`(54) Title of Invention Vehicle Lamp
`
`1
`
`Petitioners Koito et al. - Exhibit 1004 - Page 1
`
`PETITIONER EX. 1003 Page 1
`
`

`
`
`
`(57) [Abstract]
`
`[Object] To obtain a vehicle lamp capable of simplification of a structure, thinning,
`
`and uniform illumination.
`
`[Structure] Multiple optical fibers 31, each of which is integrally provided with a
`
`5
`
`light source (LED device) 33 at one end, are arranged in a planar shape, and a
`
`total reflection step for reflecting light transmitted through the inside of the optical
`
`fiber to the front is provided in a rear surface of each of the optical fibers 31 to
`
`constitute a light source unit 3 (3A, 3B), which is mounted in a lamp body 1, and to
`
`which a lens 2 is attached, thereby constituting a thin lamp.
`
`10
`
`15
`
`1: lamp body
`
`2: outer lens
`
`3 (3a, 3b): light source unit
`
`31: optical fiber
`
`
`
`2
`
`Petitioners Koito et al. - Exhibit 1004 - Page 2
`
`PETITIONER EX. 1003 Page 2
`
`

`
`
`
`[Scope of Claim for Utility Model Registration]
`
`[Claim 1]
`
`
`
`A vehicle lamp wherein plural optical fibers, each of which is integrally
`
`provided with a light source at one end, are arranged in a planar shape, a total
`
`5
`
`reflection step for reflecting light transmitted through the inside of the optical fiber
`
`to the front is provided in a rear surface of each of the optical fibers to constitute a
`
`light source unit, the light source unit is mounted in a lamp body, and a lens is
`
`disposed at a front position.
`
`[Brief Description of the Drawings]
`
`10
`
`
`
`[Fig. 1] It is a partially exploded perspective view of a first embodiment
`
`of a vehicle lamp of the invention.
`
`
`
`[Fig. 2] It is a perspective view for showing an overall configuration of
`
`the vehicle lamp in Fig. 1.
`
`
`
`[Fig. 3] It is an enlarged perspective view of main components of a light
`
`15
`
`source unit in Fig. 1.
`
`
`
`[Fig. 4] It is a cross-sectional view in a vicinity of an end of an optical
`
`fiber.
`
`
`
`[Fig. 5] It is a perspective view for showing the breakaway lamp in Fig. 1
`
`by breaking.
`
`20
`
`
`
`[Fig. 6] It is a partially exploded perspective view of a second
`
`embodiment of the invention.
`
`[Description of Reference Numerals]
`
`
`
`
`
`
`
`25
`
`1: lamp body
`
`2: outer lens
`
`3: (3A to 3C): light source unit
`
`3
`
`Petitioners Koito et al. - Exhibit 1004 - Page 3
`
`PETITIONER EX. 1003 Page 3
`
`

`
`
`
`
`
`
`
`
`
`31: optical fiber
`
`33: light emitting device (light source)
`
`35: total reflection step
`
`
`
`4
`
`Petitioners Koito et al. - Exhibit 1004 - Page 4
`
`PETITIONER EX. 1003 Page 4
`
`

`
`
`
`
`
`----------------------------------------------------------
`
`Continuation of Front Page
`
`5
`
`(51) Int. Cl.5 ID Symbol
`
`Interoffice Reference Number FI
`
`
`
`Technology Indicating Section
`
`H 01 L 33/00
`
`
`
`M 8934-4M
`
`
`
`5
`
`Petitioners Koito et al. - Exhibit 1004 - Page 5
`
`PETITIONER EX. 1003 Page 5
`
`

`
`
`
`[Detailed Description of the Invention]
`
`
`
`
`
`
`
`[0001]
`
`[Industrial Field of Application]
`
`The invention relates to a vehicle lamp and, in particular, to a vehicle lamp,
`
`5
`
`thinning of which is realized.
`
`
`
`
`
`
`
`[0002]
`
`[Prior Art]
`
`A general vehicle lamp uses a bulb that is disposed in a lamp body as a
`
`light source. In addition, in order to obtain a required light distribution
`
`10
`
`characteristic, the general vehicle lamp is configured to diffuse light by being
`
`provided with a reflecting mirror as needed and by being further provided with a
`
`diffusion step in an inner lens and an outer lens, which are disposed on a front
`
`surface of the lamp body.
`
`15
`
`
`
`
`
`
`
`[0003]
`
`[Problems that the Invention is to Solve]
`
`Since such a vehicle lamp has to secure a volume for housing the bulb in
`
`the lamp body, a dimension of the lamp in a front-rear direction is inevitably
`
`increased, and an installation space in the front-rear direction of an automobile is
`
`needed for installation in the automobile or the like. In addition, due to a large
`
`20
`
`heating value of an incandescent bulb or the like as the light source, a structure
`
`for a measure against heat is needed to radiate the heat, and a structure of the
`
`lamp is consequently complicated. Furthermore, since the light cannot
`
`sufficiently be diffused only by the diffusion steps, which are provided in the
`
`reflecting mirror, the inner lens, and the outer lens, non-uniform illumination is
`
`25
`
`inevitable to a certain degree.
`
`6
`
`Petitioners Koito et al. - Exhibit 1004 - Page 6
`
`PETITIONER EX. 1003 Page 6
`
`

`
`
`
`
`
`An object of the invention is to provide a vehicle lamp that is thinned,
`
`whose structure is simplified, and that is further capable of uniform illumination.
`
`
`
`
`
`
`
`5
`
`[0004]
`
`[Means for Solving the Problems]
`
`In a vehicle lamp of the invention, plural optical fibers, each of which is
`
`integrally provided with a light source at one end, are arranged in a planar shape,
`
`and a total reflection step for reflecting light transmitted through the inside of the
`
`optical fiber to the front is provided in a rear surface of each of the optical fibers,
`
`thereby constituting a light source unit.
`
`10
`
`
`
`
`
`
`
`[0005]
`
`[Effect]
`
`According to the invention, a light source unit configured by plural optical
`
`fibers reflects light from a light source, which enters from one end and is
`
`transmitted through the inside of each of the optical fibers, to the front, thus is
`
`15
`
`configured as a planar light source, and is capable of thinning of the lamp and
`
`uniform illumination.
`
`
`
`
`
`
`
`[0006]
`
`[Embodiments]
`
`Next, the invention will be described with reference to the drawings. Fig.
`
`20
`
`1 is a partially exploded perspective view of an embodiment in which the invention
`
`is applied to a rear lamp of an automobile, and Fig. 2 is a perspective view of an
`
`assembled state thereof. In these drawings, 1 denotes a lamp body that is
`
`formed by molding a resin or the like in a partially curved shallow disc shape and
`
`that is configured to be attachable and removable along with a lateral surface of
`
`25
`
`an automobile body. In addition, 2 denotes an outer lens that is mounted on a
`
`7
`
`Petitioners Koito et al. - Exhibit 1004 - Page 7
`
`PETITIONER EX. 1003 Page 7
`
`

`
`
`
`front edge of the lamp body 1, and defines a thin space in a front-rear direction
`
`between the lamp body 1 and the outer lens 2. A required diffusion step is
`
`formed on an inner surface of the outer lens 2, and is configured in this
`
`embodiment such that a number of vertically directed columnar steps 21 (see Fig.
`
`5
`
`5) are disposed in a lateral direction, for example.
`
`
`
`
`
`[0007]
`
`A light source unit 3 is mounted in the space defined by the lamp body 1
`
`and the outer lens 2. As partially shown in an enlarged state in Fig. 3,
`
`the light source unit 3 has an optical fiber structure in which a number of optical
`
`10
`
`conductors, each of which is formed of a transparent resin and has a circular
`
`cross section, that is, a number of relatively thick optical fibers 31 of 2 to 6 φ, each
`
`of which is formed of an acrylic resin or the like, for example, are vertically
`
`superimposed and integrated by an adhesive or the like, so as to have a front
`
`shape corresponding to the lamp body 1 and the outer lens 2. An end of the
`
`15
`
`each optical fiber 31 for constituting the optical fiber structure is disposed to face
`
`a vertically extended printed board 32, and a number of light emitting devices
`
`(LED devices) 33 mounted in the printed board 32 are each embedded in an end
`
`of the each optical fiber 31.
`
`
`
`In this embodiment, as shown in Fig. 4, a transparent short column 34 in
`
`20
`
`which the LED device 33 is integrally embedded is adhered to the end of the each
`
`optical fiber 31 by a transparent adhesive. In addition, the LED device 33 is
`
`configured that an LED chip 33a is mounted in a lead electrode 33b and, together
`
`with the lead electrode 33b, integrally embedded in the transparent short column
`
`34. The lead electrode 33b is provided with an ellipsoidal reflecting mirror 33c,
`
`25
`
`and the light emitted by the LED chip 33a is reflected by the ellipsoidal reflecting
`
`8
`
`Petitioners Koito et al. - Exhibit 1004 - Page 8
`
`PETITIONER EX. 1003 Page 8
`
`

`
`
`
`mirror 33c and projected to the other end of the optical fiber 31.
`
`
`
`
`
`[0008]
`
`As shown in Fig. 4, on a rear surface of the each optical fiber 31,
`
`wedge-shaped total reflection steps 35, each having an inclined surface inclined
`
`5
`
`at 45 degrees with respect to an optical axis, are formed to be aligned in a
`
`longitudinal direction of the optical fiber 31. The total reflection step 35 can
`
`totally reflect a portion of the light transmitted through the inside of the optical fiber
`
`31 by the inclined surface, and can reflect the portion of the light to a front surface
`
`side of the optical fiber, that is, to a front surface side of the optical fiber structure.
`
`10
`
`
`
`In this embodiment, as shown in Fig. 1, the light source unit 3 is
`
`configured by two light source units 3A, 3B, and the light source unit 3A is
`
`configured as a stop & tail lamp while the light source unit 3B is configured as a
`
`turn signal lamp. Accordingly, the LED device 33 corresponding to the stop & tail
`
`lamp is configured by a red LED while the LED device 33 corresponding to the
`
`15
`
`turn signal lamp is configured by a yellow LED.
`
`
`
`
`
`[0009]
`
`According to this configuration, as partially shown in a breakaway manner
`
`in Fig. 5, the light emitted by the LED device 33 is transmitted through the inside
`
`of the optical fiber 31, is sequentially reflected to a front direction of the optical
`
`20
`
`fiber 31 by the total reflection steps 35, and is emitted from the front surface of the
`
`optical fiber structure. The total reflection is carried out at a number of positions
`
`in the each optical fiber in the longitudinal direction thereof, and is carried out in
`
`the each optical fiber. Consequently, the light is emitted from the substantially
`
`entire front surface of the optical fiber structure.
`
`25
`
`
`
`[0010]
`
`9
`
`Petitioners Koito et al. - Exhibit 1004 - Page 9
`
`PETITIONER EX. 1003 Page 9
`
`

`
`
`
`
`
`Accordingly, since the light source unit 3 is configured by the optical fibers
`
`in this vehicle lamp, a dimension of the lamp in the front-rear direction is sufficient
`
`if it corresponds to a radial dimension of the optical fiber. Therefore, compared
`
`to a lamp in which a bulb is used as the light source, the vehicle lamp can be
`
`5
`
`configured as a thin lamp. In addition, since the light source uses the light
`
`emitted by the LED device, the heat value thereof is small, there is hardly any
`
`necessity to consider heat radiation, and thus the complicated structure for the
`
`heat radiation is unnecessary. Furthermore, since the light source unit uses the
`
`reflection light of the total reflection step, which is provided in the optical fiber, the
`
`10
`
`uniform illumination can be realized.
`
`
`
`In addition, in this embodiment, since the columnar steps 21 are arranged
`
`in the lateral direction in the outer lens 2, the light from the light source unit 3 can
`
`be diffused to a right and left direction in the outer lens 2.
`
`
`
`
`
`15
`
`[0011]
`
`Fig. 6 is an exploded perspective view for showing a second embodiment
`
`of the invention, and equivalent portions thereof to the first embodiment are
`
`denoted by the same reference numerals. In this embodiment, as in the first
`
`embodiment, a tail & stop lamp and a tail lamp are respectively configured by the
`
`light source units 3A, 3B, in each of which the optical fibers are vertically
`
`20
`
`superimposed. The red LEDs are used for these light source units 3A, 3B. In
`
`addition, a light source unit 3C, in which the plural vertically directed optical fibers
`
`are disposed in a horizontal direction, is disposed in an overlapping manner in a
`
`front surface side of the light source unit 3B as the tail lamp, and this light source
`
`unit 3C is configured as the turn signal lamp. The yellow LEDs are used for the
`
`25
`
`light source unit 3C.
`
`10
`
`Petitioners Koito et al. - Exhibit 1004 - Page 10
`
`PETITIONER EX. 1003 Page 10
`
`

`
`
`
`
`
`
`
`[0012]
`
`In this configuration, particularly in portions as the tail lamp and the turn
`
`signal lamp, the light source units 3A, 3B are lit by lighting the red LEDs, so as to
`
`allow the tail lamp to be lit, and the light source unit 3C is lit by lighting the yellow
`
`5
`
`LEDs, so as to allow the turn signal lamp to be lit.
`
`
`
`Here, in the portions as the tail lamp and the turn signal lamp, the two light
`
`source units 3B, 3C are overlapped in the front-rear direction. However, since
`
`each of the light source units is configured to be thin, even with overlapping of
`
`both of the light source units, thinning of the lamp can still be achieved in
`
`10
`
`comparison with the conventional configuration.
`
`
`
`
`
`
`
`[0013]
`
`[Advantage of the Invention]
`
`As it has been described so far, the plural optical fibers, each of which is
`
`integrally provided with the light source at the one end, are arranged in the planar
`
`15
`
`shape, and the rear surface of the each optical fiber is provided with the total
`
`reflection step, which reflects the light transmitted through the inside of the optical
`
`fiber to the front, thereby configuring the light source unit. Accordingly, the light
`
`source unit can be configured as a planar light source by reflecting the light from
`
`the light source, which is transmitted through the inside of the optical fiber, to the
`
`20
`
`front. Therefore, the invention has an effect of realizing thinning of the lamp and
`
`the uniform illumination.
`
`11
`
`Petitioners Koito et al. - Exhibit 1004 - Page 11
`
`PETITIONER EX. 1003 Page 11
`
`

`
`CERTIFICATE OF TRANSLATION 
`
`I, Takuya  Takahashi, of  Tokyo, Japan, hereby certify that I am conversant 
`
`in  both  Japanese  and  English  and  the  following  is,  to  the  best  of  my 
`
`knowledge  and  belief,  a  true  and  accurate  translation  of  the  original 
`
`document from Japanese to English. 
`
`I hereby acknowledge that any willful false statements and the like made in 
`
`this Declaration are punishable by fine or imprisonment, or both (18 U.S.C. 
`
`1001).  Furthermore,  I  declare  that  all  statements  made  of  my  own 
`
`knowledge are true and  all statements made on  information and belief are 
`
`believed to be true. 
`
`Translated Material: JP H5­25602U 
`
`Executed on this 29th day of December, 2014 at Tokyo, Japan. 
`
`Takuya Takahashi 
`
`Petitioners Koito et al. - Exhibit 1004 - Page 12
`
`PETITIONER EX. 1003 Page 12
`
`

`
`(57)【要約】
`【目的】 構造の簡略化、薄型化、及び均一照明を可能
`にした車両用灯具を得る。
`【構成】 一端部に夫々光源（ＬＥＤ素子）３３を一体
`的に設けた複数本の光ファイバ３１を面状に配列し、か
`つ各光ファイバ３１の背面には光ファイバ内を伝達され
`る光を前面に向けて反射させる全反射ステップを設けて
`光源ユニット３（３Ａ，３Ｂ）を構成し、これを灯具ボ
`ディ１内に内装し、かつレンズ２を取着して薄型の灯具
`を構成する。
`
`PETITIONER EX. 1003 Page 13
`
`

`
`1
`【実用新案登録請求の範囲】
`【請求項１】 一端部に光源を一体的に設けた複数本の
`光ファイバを面状に配列し、かつ各光ファイバの背面に
`は光ファイバ内を伝達される光を前面に向けて反射させ
`る全反射ステップを設けて光源ユニットを構成し、この
`光源ユニットを灯具ボディ内に内装し、前面位置にはレ
`ンズを配設したことを特徴とする車両用灯具。
`【図面の簡単な説明】
`【図１】本考案の車両用灯具の第１実施例の部分分解斜
`視図である。
`【図２】図１の車両用灯具の全体構成を示す斜視図であ
`る。
`【図３】図１の光源ユニットの要部の拡大斜視図であ
`
`＊
`
`(2)
`
`＊
`
`1010
`
` 実開平５−２５６０２
`2
`
`る。
`【図４】光ファイバの一端部近傍の断面図である。
`【図５】図１の灯具の一部を破断して示す斜視図であ
`る。
`【図６】本考案の第２実施例の部分分解斜視図である。
`【符号の説明】
`１ 灯具ボディ
`２ アウターレンズ
`３（３Ａ〜３Ｃ） 光源ユニット
`３１ 光ファイバ
`３３ 発光素子（光源）
`３５ 全反射ステップ
`
`【図１】
`
`【図２】
`
`【図３】
`
`【図４】
`
`【図５】
`
`PETITIONER EX. 1003 Page 14
`
`

`
`(3)
`
` 実開平５−２５６０２
`
`【図６】
`
`
`
`─────────────────────────────────────────────────────
`フロントページの続き
`
`(51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所
` Ｈ０１Ｌ 33/00 Ｍ 8934−4Ｍ
`
`PETITIONER EX. 1003 Page 15
`
`

`
`(4)
`
` 実開平５−２５６０２
`
`【考案の詳細な説明】
` 【０００１】
` 【産業上の利用分野】
` 本考案は車両用灯具に関し、特に薄型化を図った車両用灯具に関する。
` 【０００２】
` 【従来の技術】
` 一般の車両用灯具は、灯具ボディの内部に配設した電球を光源として用いてい
`る。又、所要の配光特性を得るために、必要に応じて灯具ボディ内に反射鏡を設
`け、更には灯具ボディの前面に配設したインナーレンズやアウターレンズに拡散
`ステップを設けて光を拡散させる構成とされている。
` 【０００３】
` 【考案が解決しようとする課題】
` このような車両用灯具は、灯具ボディ内に電球を収納するための容積を確保す
`る必要があるため、必然的に灯具の前後方向の寸法が大きくなり、自動車等に装
`備するときに自動車の前後方向の装備スペースが必要とされる。又、光源として
`の白熱電球等は発熱量が大きいため、熱を放散させるための熱対策構造が必要と
`なり、灯具の構造が複雑になる。更に、反射鏡、インナーレンズ、アウターレン
`ズに設けた拡散ステップのみでは充分に光を拡散させることができず、多少の照
`明ムラが生じることは避けられない。
` 本考案の目的は、薄型化を図るとともに構造の簡略化を図り、更に均一照明を
`可能にした車両用灯具を提供することにある。
` 【０００４】
` 【課題を解決するための手段】
` 本考案の車両用灯具は、一端部に夫々光源を一体的に設けた複数本の光ファイ
`バを面状に配列し、かつ各光ファイバの背面には光ファイバ内を伝達される光を
`前面に向けて反射させる全反射ステップを設けて光源ユニットを構成する。
` 【０００５】
` 【作用】
` 本考案によれば、複数本の光ファイバで構成される光源ユニットは、一端部か
`
`PETITIONER EX. 1003 Page 16
`
`

`
`(5)
` 実開平５−２５６０２
`ら入射されて光ファイバ内を伝達される光源からの光を前面に向けて反射させる
`ことで、面光源として構成され、灯具の薄型化、均一照明を可能とする。
` 【０００６】
` 【実施例】
` 次に、本考案について図面を参照して説明する。図１は本考案を自動車のリア
`ランプに適用した実施例の部分分解斜視図、図２はその組立状態の斜視図である
`。これらの図において、１は灯具ボディであり、樹脂等を成形して一部が湾曲さ
`れた浅皿状に形成し、これを自動車のボディ側面に沿って取着可能な構成とする
`。又、２はアウターレンズであり、前記灯具ボディ１の前側縁に装着され、灯具
`ボディ１との間に前後方向に薄い空間を画成する。このアウターレンズ２の内面
`には所要の拡散ステップを形成しており、例えば本実施例では縦方向に向けた多
`数個の円柱ステップ２１（図５参照）を横方向に配設した構成としている。
` 【０００７】
` 前記灯具ボディ１とアウターレンズ２で画成される空間内には光源ユニット３
`が内装される。この光源ユニット３は、図３に一部を拡大図示するように、断面
`が円形をした透明樹脂からなる光伝導体、例えばアクリル樹脂等からなる２〜６
`φの比較的に太い光ファイバ３１を上下方向に多数本重ねて接着剤等で一体化さ
`せ、かつ前記灯具ボディ１及びアウターレンズ２に対応する正面形状とした光フ
`ァイバ構体を有する。光ファイバ構体を構成する各光ファイバ３１の一端は上下
`に延設したプリント基板３２に対向配置され、プリント基板３２に搭載した多数
`個の発光素子（ＬＥＤ素子）３３が各光ファイバ３１の一端部に埋設されるよう
`にする。
` 尚、この実施例では図４に示すように、各光ファイバ３１の一端に、ＬＥＤ素
`子３３を一体的に埋設した透明短円柱３４を透明接着剤で接着している。又、Ｌ
`ＥＤ素子３３はＬＥＤチップ３３ａをリード電極３３ｂに搭載した構成とされて
`おり、このリード電極３３ｂと共に一体的に前記透明短円柱３４に埋設されてい
`る。このリード電極３３ｂには楕円反射鏡３３ｃが設けられ、ＬＥＤチップ３３
`ａで発光された光は楕円反射鏡３３ｃで反射されて光ファイバ３１の他端側に向
`けて投射される。
`
`PETITIONER EX. 1003 Page 17
`
`

`
`(6)
`
` 実開平５−２５６０２
`
` 【０００８】
` 又、各光ファイバ３１の背面には、図４に示すように、斜面が光軸に対して４
`５度傾斜された楔型をした全反射ステップ３５を光ファイバ３１の長さ方向に並
`んで形成する。この全反射ステップ３５は光ファイバ３１内を伝達される光の一
`部をその斜面で全反射させ、光ファイバの正面側、即ち光ファイバ構体の正面側
`に向けて反射させることができる。
` 尚、この実施例では、図１のように光源ユニット３を二つの光源ユニット３Ａ
`，３Ｂとして構成し、一方の光源ユニット３Ａをストップ＆テールランプとして
`構成し、他方の光源ユニット３Ｂをターンシグナルランプとして構成しているも
`のとする。したがって、前記ＬＥＤ素子３３は、ストップ＆テールランプに相当
`するものを赤色ＬＥＤで構成し、ターンシグナルランプに相当するものを黄色Ｌ
`ＥＤで構成する。
` 【０００９】
` この構成によれば、図５に一部を破断して示すように、ＬＥＤ素子３３で発光
`された光は、光ファイバ３１内を伝達され、全反射ステップ３５によって順次光
`ファイバ３１の正面方向に向けて反射され、光ファイバ構体の正面から射出され
`る。この全反射は各光ファイバにおいてその長さ方向の多数箇所で行われ、しか
`も各光フイァバにおいて行われるため、結果として光ファイバ構体はその正面の
`略全面から光が射出されることになる。
` 【００１０】
` したがって、この車両用灯具では光源ユニット３が光ファイバで構成されるた
`め、灯具の前後方向の寸法は光ファイバの径寸法程度でよく、光源に電球を用い
`たものに比較して薄型の灯具として構成することができる。しかも、この光源は
`ＬＥＤ素子で発光される光を利用しているため、発熱が少なく、放熱を考慮する
`必要は殆どなく、そのために構造が複雑化することもない。更に、光源ユニット
`は光ファイバに設けた全反射ステップの反射光を利用するため、均一な照明が可
`能となる。
` 又、この実施例ではアウターレンズ２に円柱ステップ２１を横方向に配列して
`いるため、光源ユニット３からの光をアウターレンズ２において左右方向に拡散
`
`PETITIONER EX. 1003 Page 18
`
`

`
`(7)
`
` 実開平５−２５６０２
`
`させることができる。
` 【００１１】
` 図６は本考案の第２実施例を示す分解斜視図であり、第１実施例と等価な部分
`には同一符号を付してある。この実施例では、第１実施例と同様に光ファイバを
`上下に重ねた光源ユニット３Ａ，３Ｂで夫々テール＆ストップランプとテールラ
`ンプを構成する。これらの光源ユニット３Ａ，３Ｂには赤色ＬＥＤが用いられる
`。又、テールランプとしての光源ユニット３Ｂの正面側には、上下方向に向けた
`複数本の光ファイバを水平方向に配設した光源ユニット３Ｃを重ねて配設し、こ
`の光源ユニット３Ｃをターンシグナルランプとして構成する。この光源ユニット
`３Ｃには黄色ＬＥＤが用いられる。
` 【００１２】
` この構成では、特にテールランプ及びターンシグナルランプの部位においては
`、赤色ＬＥＤを点灯することで光源ユニット３Ａ，３Ｂを点灯させてテールラン
`プを点灯させ、黄色ＬＥＤを点灯することで光源ユニット３Ｃを点灯させてター
`ンシグナルランプを点灯させることができる。
` 尚、ここでは、テールランプとターンシグナルランプの部位で２つの光源ユニ
`ット３Ｂ，３Ｃを前後方向に重ねているが、各光源ユニットはそれぞれ薄く構成
`されているため、両光源ユニットを重ねても従来構成に比較して薄型化を図るこ
`とができる。
` 【００１３】
` 【考案の効果】
` 以上説明したように本考案は、夫々一端部に光源を一体的に設けた複数本の光
`ファイバを面状に配列し、かつ各光ファイバの背面には光ファイバ内を伝達され
`る光を前面に向けて反射させる全反射ステップを設けて光源ユニットを構成して
`いるので、光源ユニットは光ファイバ内を伝達される光源からの光を前面に向け
`て反射させることで面光源として構成でき、灯具の薄型化を実現するとともに、
`均一な照明を行うことができる効果がある。
`
`PETITIONER EX. 1003 Page 19

This document is available on Docket Alarm but you must sign up to view it.


Or .

Accessing this document will incur an additional charge of $.

After purchase, you can access this document again without charge.

Accept $ Charge
throbber

Still Working On It

This document is taking longer than usual to download. This can happen if we need to contact the court directly to obtain the document and their servers are running slowly.

Give it another minute or two to complete, and then try the refresh button.

throbber

A few More Minutes ... Still Working

It can take up to 5 minutes for us to download a document if the court servers are running slowly.

Thank you for your continued patience.

This document could not be displayed.

We could not find this document within its docket. Please go back to the docket page and check the link. If that does not work, go back to the docket and refresh it to pull the newest information.

Your account does not support viewing this document.

You need a Paid Account to view this document. Click here to change your account type.

Your account does not support viewing this document.

Set your membership status to view this document.

With a Docket Alarm membership, you'll get a whole lot more, including:

  • Up-to-date information for this case.
  • Email alerts whenever there is an update.
  • Full text search for other cases.
  • Get email alerts whenever a new case matches your search.

Become a Member

One Moment Please

The filing “” is large (MB) and is being downloaded.

Please refresh this page in a few minutes to see if the filing has been downloaded. The filing will also be emailed to you when the download completes.

Your document is on its way!

If you do not receive the document in five minutes, contact support at support@docketalarm.com.

Sealed Document

We are unable to display this document, it may be under a court ordered seal.

If you have proper credentials to access the file, you may proceed directly to the court's system using your government issued username and password.


Access Government Site

We are redirecting you
to a mobile optimized page.





Document Unreadable or Corrupt

Refresh this Document
Go to the Docket

We are unable to display this document.

Refresh this Document
Go to the Docket