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JP3644476B2 - Portable electronic devices - Google Patents

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Publication number
JP3644476B2
JP3644476B2 JP13596998A JP13596998A JP3644476B2 JP 3644476 B2 JP3644476 B2 JP 3644476B2 JP 13596998 A JP13596998 A JP 13596998A JP 13596998 A JP13596998 A JP 13596998A JP 3644476 B2 JP3644476 B2 JP 3644476B2
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JP
Japan
Prior art keywords
light
guide member
light guide
liquid crystal
portable electronic
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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
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JP13596998A
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Japanese (ja)
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JPH11316553A (en
Inventor
賢三 堀江
孝幸 高橋
宗弘 鳥居
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.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Priority to JP13596998A priority Critical patent/JP3644476B2/en
Priority to GB9910125A priority patent/GB2336933B/en
Publication of JPH11316553A publication Critical patent/JPH11316553A/en
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Publication of JP3644476B2 publication Critical patent/JP3644476B2/en
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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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133616—Front illuminating devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、液晶表示デバイスを有する携帯用電子機器に関する。
【０００２】
【従来の技術】
近年、コンピュータや携帯端末機器に使用されるディスプレイデバイスとしての液晶表示デバイスがある。そして、この液晶表示デバイスに使用される液晶は、タイプから透過型、半透過型、反射型に分けることができる。
【０００３】
透過型の液晶を用いた液晶表示デバイスはノートＰＣや大型の端末機器に用いられており、冷陰極管によるバックライトで表示を明るく見易くしている。しかしながら、この透過型の液晶を用いた液晶表示デバイスは消費電力が大きく且つ部品が大きいため携帯型には向かない。
【０００４】
また、半透過型の液晶を用いた液晶表示デバイスを備えた携帯用電子機器としては、図６に示すものがある。この携帯用電子機器は、照明有り無しの両方の状態で表示が見えるようにしたものであり、照明には面発光体としてのＥＬが用いられている。
【０００５】
すなわち、この携帯用電子機器は、下ケース４１内に基板４２が収納してあって、この基板４２の上方には液晶パネルホルダー４３が収納してあり、この液晶パネルホルダー４３には面発光体としてのＥＬ４４と液晶パネル４５とが載せてあり、そして、液晶パネル４５上にはスペーサ４６を介してタッチパネル４７が重ねてあり、その上に上ケース４８が重ねてあって、この上ケース４８を下ケース４１に係脱可能に係合することにより、液晶パネルホルダー４３と、ＥＬ４４と、液晶パネル４５と、タッチパネル４７とが上下方向に挟圧保持された状態になっている。
【０００６】
上記したように、半透過型の液晶を用いた液晶表示デバイスは、照明の入切りの切換え操作をすることにより消費電力を抑えることが可能なため携帯型の端末にも見られるが、液晶表示の文字とベースのコントラストが落ちるという難点がある。また、バックライトとしてのＥＬ４４は寿命が短くメンテナンス性を考慮しなければならないという欠点があった。
【０００７】
また、反射型は、外光を反射させて液晶表示を見るというやり方であり、消費電力が低く押さえられ、コントラストも有り見やすいという特徴がある。
【０００８】
【発明が解決しようとする課題】
しかしながら、上記したように反射型液晶を使用した液晶表示ディバイスは画面の文字と周囲のコントラストがよいが、外光により表示の視認を行うため暗い所では表示が見えないという問題点があった。
【０００９】
本発明は、上記の問題点に着目して成されたものであって、その目的とするところは、反射型液晶を用いて高コントラストを生かし暗い場所では容易に照明を外光として与えることが可能になって、表示の視認が良好になると共に、消費電力を極力抑え得る携帯用電子機器を提供することにある。
【００１０】
【課題を解決するための手段】
上記の目的を達成するために、請求項１の発明に係る携帯用電子機器は、表示デバイスとして反射型液晶パネルを用いた携帯用電子機器であって、機器本体内に、入射光を反射型液晶パネル側に導く導光部材と、光源と、光源からの光を導光部材に導くリフレクターと、リフレクターにより導かれた光が入射する導光部材の入射部に設けた光を一様に拡散させる拡散シートと、導光部材の表側に配置した透明な板状体とを有したことを特徴とする。
【００１１】
また、上記の目的を達成するために、請求項２の発明の係る携帯用電子機器は、請求項１に記載の携帯用電子機器において、板状体がタッチパネルである。
【００１５】
また、上記の目的を達成するために、請求項３の発明に係る携帯用電子機器は、請求項１に記載の携帯用電子機器において、入射部と直線上で無い位置関係に配置した光源である発光ダイオードと、発光ダイオードが他の電子部品と同一平面上に位置させてメイン基板に実装し、発光ダイオードと入射部との間に設けた入射部に対して角度を持って設けたリフレクターとを有するようにした。
【００１７】
かかる構成により、反射型液晶パネルを用いて高コントラストを生かし暗い場所では容易に照明を外光として与えることが可能になって、表示の視認が良好になると共に、消費電力を極力抑え得るし、また、導光部材の上部に装着した透明な板状体またはタッチパネルにより、導光部材の表面を傷付けたり汚れから保護することができ、照明機能を維持することができる。
【００１８】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
【００１９】
請求項１の発明に係る携帯用電子機器は、表示デバイスとして反射型液晶パネルを用いた携帯用電子機器であって、機器本体内に、入射光を反射型液晶パネル側に導く導光部材と、光源と、光源からの光を導光部材に導くリフレクターと、リフレクターにより導かれた光が入射する導光部材の入射部に設けた光を一様に拡散させる拡散シートと、導光部材の表側に配置した透明な板状体とを有したことを特徴とする。
【００２０】
かかる構成により、反射型液晶パネルを用いて高コントラストを生かし暗い場所では容易に照明を外光として与えることが可能になって、表示の視認が良好になると共に、消費電力を極力抑え得るし、また、導光部材の上部に装着した透明な板状体により、導光部材の表面を傷付けたり汚れから保護することができ、照明機能を維持することができる。
【００２１】
また、請求項２の発明に係る携帯用電子機器は、請求項１に記載の携帯用電子機器において、板状体がタッチパネルである。
【００２２】
かかる構成により、上記した請求項１の発明の作用効果と同様な作用効果を奏し得るばかりか、導光部材の上部に装着したタッチパネルにより、導光部材の表面を傷付けたり汚れから保護することができ、照明機能を維持することができる。
【００２９】
また、上記の目的を達成するために、請求項３の発明に係る携帯用電子機器は、請求項１に記載の携帯用電子機器において、入射部と直線上で無い位置関係に配置した光源である発光ダイオードと、発光ダイオードが他の電子部品と同一平面上に位置させてメイン基板に実装し、発光ダイオードと入射部との間に設けた入射部に対して角度を持って設けたリフレクターとを有するようにした。
【００３０】
かかる構成により、上記した請求項１の発明の作用効果と同様な作用効果を奏し得るばかりか、光源基板やケーブル、コネクタを廃止することが可能になり、安価で且つ機器の小形化を図りながら機能を実現することができる。
【００３３】
（実施の形態例１）
本発明に係る携帯用電子機器の実施の形態例１を図１乃至図３に示す。
【００３４】
本発明に係る携帯用電子機器は、下ケース１と、メイン基板２と、液晶パネルホルダー３と、反射型液晶パネル４と、導光部材５と、リフレクター６と、透明な板状体としてのタッチパネル７と、上ケース８とから構成してある。そして、上、下ケース１、８で機器本体を構成している。
【００３５】
そして、前記下ケース１は、長方形状の底面部１ａの周部に周壁部１ｂを立ちあげて構成されたケース本体１Ａを有しており、このケース本体１Ａの一隅には電池収容部１９が形成してあり、また、底面部１ａには３つの隅部及び電池収容部１９の隅部側に寄せて取付座２０が形成してあり、また、底面部１ａの周壁部１ｂ寄りには、周方向に所定の間隔をおいて複数のスペーサ９が設けてあり、これらのスペーサ９は底面部１ａから周壁部１ｂの内面に跨がるリブから構成してある。
【００３６】
また、メイン基板２は、下ケース１の底面部１ａの形状に相似する基板本体２Ａを有しており、この基板本体２Ａの各隅角部には取付用穴１０が設けてあり、また、基板本体２Ａの実装面には多数の電子部品１１が実装してあり、また、基板本体２Ａの実装面には、その長手方向の一方の辺縁部２ａ寄りに、複数の光源である発光ダイオード（ＬＥＤ）１２が、長手方向に所定の間隔をおいて実装してある。
【００３７】
また、前記液晶パネルホルダー３は、下ケース１の底面部１ａの形状に相似するホルダー本体３Ａを有しており、このホルダー本体３Ａは、長方形状の面部１３と、この面部１３の周囲に設けられてこの面部１３より一段高くされたパネル支持部１４と、このパネル支持部１４の外にある枠部１５とを有しており、面部１３の長手方向の一方の辺縁部１３ａには、この面部１３より一段低くリフレクター設置部１６が形成してあり、このリフレクター設置部１６には、その長手方向に所定の間隔で複数の光源用窓部１７が形成してある。また、ホルダー本体３Ａの面部１３には複数の開口部１８が形成してある。
【００３８】
また、前記反射型液晶パネル４は、２枚のガラス板２１、２２の対向側に配置した対向電極板間の隙間に液晶を充填させたものである。
【００３９】
また、前記導光部材５は、厚さが１〜２ｍｍ程度の透明なアクリル樹脂の板（長方形の板）より構成してあり、その表面５ｅには、導光部材５の長手方向に沿うＶ型の溝３１が導光部材５の短手方向に多数形成してある。これらの溝３１は、導光部材５の長手方向の一方の辺縁部５ａ、すなわち光の入射部イ側の傾斜面が、この入射部イから入射した光ハを略直角方向に反射させる反射面３１Ａに成されている。
【００４０】
また、導光部材５の長手方向の一方の辺縁部５ａを除く他の辺縁部５ｂ、５ｃ、５ｄには枠部２３が設けてあり、一方の辺縁部５ａの端面２４には拡散シート２５が取り付けてある。また、この導光部材５の一方の辺縁部５ａにはリフレクター６が取り付けてある。
【００４１】
すなわち、このリフレクター６は、内側反射板２６と、外側反射板２７と、２つの端部反射板２８とを備えており、内側反射板２６は、その取付部２６Ａに対して略直角に反射面部２６Ｂを形成して構成してあり、また、外側反射板２７は、その取付部２７Ａに対して鈍角に反射面部２７Ｂを形成して構成してある。そして、内、外側反射板２６、２７は、その取付部２６Ａ、２７Ａが平行するように、その両端部を端部反射板２８を介して互いに連結してある。
【００４２】
そして、リフレクター６は、その取付部２６Ａ、２７Ａ間に導光部材５の長手方向の一方の辺縁部５ａが挿入されるようにして、この導光部材５に取り付けてある。
【００４３】
また、タッチパネル７はその周部の枠部２９を有しており、また、上ケース８は、その面部８Ａに長方形状の開口窓部３０を有している。そして、タッチパネル７の上、下電極（図示せず）はフィルムで構成してある。
【００４４】
そして、前記下ケース１内にメイン基板２が収納してあって、このメイン基板２は、取付用穴１０に挿通したビス（図示せず）を取付座２０にねじ込んで下ケース１に固定してあり、スペーサ９はメイン基板２の周部を支えている。また、下ケース１内には、メイン基板２に重ねて液晶パネルホルダー３が収納してあり、この液晶パネルホルダー３のリフレクター設置部１６の裏面部１６Ａがメイン基板２に当接していて、複数の発光ダイオード（ＬＥＤ）１２の一つ一つがリフレクター設置部１６の光源用窓部１７内に挿入してある。また、液晶パネルホルダー３の面部１３に設けた開口部１８にメイン基板２に実装された電子部品１１が挿入してある。
【００４５】
また、液晶パネルホルダー３のパネル支持部１４には反射型液晶パネル４が載せてあり、そして、反射型液晶パネル４上には導光部材５が重ねてあり、この導光部材５に装着されたリフレクター６の先部分が液晶パネルホルダー３のリフレクター設置部１６内に挿入してある。また、導光部材５上にはタッチパネル７が重ねてあり、その上に上ケース８が重ねてあって、この上ケース８を下ケース１に係脱可能に係合することにより、液晶パネルホルダー３と、反射型液晶パネル４と、導光部材５と、タッチパネル７とが上下方向に挟圧保持された状態になっている。
【００４６】
この場合、光源である複数の発光ダイオード（ＬＥＤ）１２の軸線ニに対して導光部材５は直角に配置されており、リフレクター６が発光ダイオード（ＬＥＤ）１２が発した光Ｒを、導光部材５の長手方向一方の辺縁部５ａ、すなわち光の入射部イに導いている。
【００４７】
また、液晶パネルホルダー３のリフレクター設置部１６の上面１６ａ及びこのリフレクター設置部１６の光源用窓部１７の周壁面１７ａには光が反射する反射手段、すなわち、白色の印刷または塗装が施してある。
【００４８】
次の上記のように構成された液晶表示装置における光の挙動を説明する。
光源である複数の発光ダイオード（ＬＥＤ）１２を点灯させると、これらの発光ダイオード（ＬＥＤ）１２が発した光Ｒは、リフレクター６の内、外側反射板２６、２７及び２つの端部反射板２８に当たり、反射を繰り返して、導光部材５の長手方向一方の辺縁部５ａに設けた拡散シート２５に入射して拡散され、導光部材５の長手方向一方の辺縁部５ａである光の入射部イに入射される。
【００４９】
この導光部材５に入射した光Ｒの一部ハは、図３に示すように、導光部材５の表面に形成した多数の溝３１の反射面３１Ａに当たって反射され、この反射光ハは反射型液晶パネル４に略直角に入射する。
【００５０】
このように、複数の発光ダイオード（ＬＥＤ）１２が発した光を外光の代りをさせることにより、暗い所でも、反射型液晶パネル４を用いた表示デバイスの表示の視認が可能になる。
【００５１】
しかも、発光ダイオード（ＬＥＤ）１２は点光源であるが、使用個数を増やし、導光部材５への入射時に拡散シート２５で入射光を拡散させることで、一様な光を作り、導光部材５の反射の光むらをなくすことが可能になる。しかも、発光ダイオード（ＬＥＤ）１２を用いることで、安価で小形化、光源部品の長寿命化が図れる照明構造を構成できる。また、低消費電力による電池寿命の長時間化が図れる。
【００５２】
また、導光部材５の上部に装着したタッチパネル７により、導光部材５の表面の溝３１を傷付けたり汚れから保護することができ、導光部材５の照明機能を維持することができる。
【００５３】
また、導光部材５は、透明なアクリル樹脂製の板であり、上部から外力を受けても導光部材５が撓み変形して液晶面に負荷が加わらないように、ある程度の剛性を有するように厚さは１〜２ｍｍで作成されているために、従来のタッチパネルの下電極に使用されているガラス板の剛性機能を兼ねさせ、タッチパネル７を表面から押下しても液晶面には負荷が加わらず、また、タッチパネル７及び導光部材５の総合厚みを抑え、液晶点灯時の表示視差(奥行き感)を小さく(軽減)することができる。
【００５４】
光源である複数の発光ダイオード（ＬＥＤ）１２の軸線ニに対して導光部材５は直角に配置されており、リフレクター７に角度を付けて導光部材５の端面５ａと発光ダイオード（ＬＥＤ）１２からの光を導いている。このように、リフレクター６に角度を付けることで発光ダイオード（ＬＥＤ）１２を実装するメイン基板２の位置が奥行き方向だけでなく高さ方向に配置することで装置の小形化を図れる。
【００５５】
また、液晶パネルホルダー３のリフレクター設置部１６の上面１６ａ及びこのリフレクター設置部１６の光源用窓部１７の周壁面１７ａには光が反射するように白く印刷または塗装が施してあるために、リフレクター７から導光部材５に入射されず発光ダイオード（ＬＥＤ）１２近くまで、逆に反射してきた光を再度、導光部材５に入射させることができ、入射効率を向上させることができる。
【００５６】
このために、導光部材５に入射されるはずの光がリフレクター６や導光部材５の形状、拡散シート２５の貼り付け条件等で入射されず、光源近くまでに返ってきた場合に、光源周囲を反射色に染めることで、再度、リフレクター６を通過し導光部材５に入射されるため、入射光が増加し導光部材５の発光効率が向上する。
【００５７】
また、光源としての発光ダイオード（ＬＥＤ）１２を他の電子部品１１を実装したメイン基板２に実装するようにしたために、光源基板やケーブル、コネクタを廃止することが可能になり、安価で且つ機器の小形化を図りながら機能を意実現することができる。
【００５８】
（実施の形態例２）
本発明に係る携帯用電子機器の実施の形態例２を図４に示す。
【００５９】
本発明に係る携帯用電子機器の実施の形態例２にあっては、発光ダイオード（ＬＥＤ）１２をメイン基板２に直接実装せずに、このメイン基板２とは別体のＬＥＤ基板３１に発光ダイオード（ＬＥＤ）１２を実装するようにしたものであり、他の構成は上記した携帯用電子機器の実施の形態例１と同様であるために説明を省略する。
【００６０】
この場合、前記液晶パネルホルダー３には、リフレクター設置部１６はなく、基板保持部３２が形成してあって、この基板保持部３２にＬＥＤ基板３１が、メイン基板２と平行に保持されており、このＬＥＤ基板３１とメイン基板２とは、コネクタ３３及びケーブル３４により接続される。そして、導光部材５に装着されたリフレクター６−１は、実施の形態例１におけるリフレクター６と同構成であり、このリフレクター６−１の先部分はＬＥＤ基板３１の上面に当接しており、リフレクター６−１内に発光ダイオード（ＬＥＤ）１２を収納している。
【００６１】
（実施の形態例３）
本発明に係る携帯用電子機器の実施の形態例３を図５に示す。
【００６２】
本発明に係る携帯用電子機器の実施の形態例３にあっては、発光ダイオード（ＬＥＤ）１２をメイン基板２に直接実装せずに、このメイン基板２とは別体のＬＥＤ基板３１−１に発光ダイオード（ＬＥＤ）１２を実装するようにしたものであり、この場合、前記液晶パネルホルダー３には、リフレクター設置部１６はなく、基板保持部３２が形成してあって、この基板保持部３２にＬＥＤ基板３１−１がメイン基板２に対して垂直に保持されており、このＬＥＤ基板３１とメイン基板２とは、コネクタ３３及びケーブル３４により接続される。
【００６３】
また、導光部材５に装着されたリフレクター６−２は直線状であって、水平の配置してあり、このリフレクター６−２の先部分はＬＥＤ基板３１の上面に当接しており、リフレクター６−２内に発光ダイオード（ＬＥＤ）１２を収納している。
【００６４】
【発明の効果】
以上、説明したように、本発明の係る携帯用電子機器によれば、反射型液晶パネルを用いて高コントラストを生かし暗い場所では容易に照明を外光として与えることが可能になって、表示の視認が良好になると共に、消費電力を極力抑え得るし、また、導光部材の上部に装着した透明な状体板により、導光部材の表面を傷付けたり汚れから保護することができ、照明機能を維持することができる。
【００６５】
また、導光部材に光を入射させるための光源に発光ダイオードを用い、リフレクターにより導かれた光が入射する導光部材の端面に光を一様に拡散させる拡散シートを配したことにより、発光ダイオードは点光源であるが、使用個数を増やし、導光部材への入射時に拡散シートで入射光を拡散させることで一様な光を作り、導光部材の反射の光むらをなくすことが可能となる。発光ダイオードを上記構成で用いることにより、安価で小形化、光源部品の長寿命化が図れる照明構造を構成できる。また、低消費電力による電池寿命の長時間化が図れる。
【００６６】
また、導光部材を、ある程度の剛性を有する厚さの透明なアクリル樹脂板で構成して、この導光部材の表面に、入射光を反射型液面パネル側に導く反射面を形成し、且つ、導光部材の厚みを、ある程度の剛性を有する厚さ、例えば１〜２ｍｍにすることで、従来のタッチパネルの下電極に使用されているガラス板の剛性機能を兼ねさせ、タッチパネルを表面から押下しても液晶面には負荷が加わらず、また、タッチパネル及び導光部材の総合厚みを抑え、液晶点灯時の表示視差(奥行き感)を小さく(軽減)することができる。
【００６７】
また、リフレクターに角度を付けて、導光部材の端面と、発光ダイオードを実装した基板との位置関係を直線上に配置しないようにしたことにより、リフレクターに角度付けることで光源となる基板の位置が奥行き方向だけでなく高さ方向に配置することで装置の小形化を図れる。
【００６８】
また、発光ダイオードを、他の電子部品と同一平面上に位置させてメイン基板に実装するようにしたことにより、光源基板やケーブル、コネクタを廃止することが可能になり、安価で且つ機器の小形化を図りながら機能を実現することができる。
【００６９】
また、発光ダイオードの周囲に、光が反射する反射手段を講じて、リフレクターから導光部材に入射されずに発光ダイオード近くまで逆に反射してきた光を、再度、導光部材に入射させるようにしたことにより、導光部材に入射されるはずの光がリフレクターや導光部材の形状、拡散シートの貼り付け条件等で入射されず、光源近くまでに返ってきた場合に、光源周囲を反射色に染めることで、再度リフレクターを通過し導光部材に入射されるため、入射光が増加し導光部材の発光効率が向上する。
【図面の簡単な説明】
【図１】本発明に係る携帯用電子機器（実施の形態例１）の分解状態の斜視図
【図２】同携帯用電子機器（実施の形態例１）の一部省略した断面図
【図３】同携帯用電子機器（実施の形態例１）における導光部材の光の入射及び反射の説明図
【図４】本発明に係る携帯用電子機器（実施の形態例２）の一部省略した断面図
【図５】本発明に係る携帯用電子機器（実施の形態例３）の一部省略した断面図
【図６】従来の携帯用電子機器の一部省略した断面図
【符号の説明】
１ 下ケース（機器本体）
２ メイン基板
３ 液晶パネルホルダー
４ 反射型液晶パネル
５ 導光部材
６ リフレクター
７ タッチパネル
８ 上ケース（機器本体）
１２ 発光ダイオード（光源）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a portable electronic device having a liquid crystal display device.
[0002]
[Prior art]
In recent years, there is a liquid crystal display device as a display device used for a computer or a portable terminal device. And the liquid crystal used for this liquid crystal display device can be divided into a transmission type, a semi-transmission type, and a reflection type.
[0003]
A liquid crystal display device using a transmissive liquid crystal is used in a notebook PC or a large terminal device, and the display is bright and easy to see with a backlight using a cold cathode tube. However, the liquid crystal display device using the transmissive liquid crystal is not suitable for a portable type because of high power consumption and large parts.
[0004]
As a portable electronic device provided with a liquid crystal display device using a transflective liquid crystal, there is the one shown in FIG. In this portable electronic device, the display can be seen both in the presence and absence of illumination, and an EL as a surface light emitter is used for illumination.
[0005]
That is, in this portable electronic device, a substrate 42 is accommodated in a lower case 41, and a liquid crystal panel holder 43 is accommodated above the substrate 42. The liquid crystal panel holder 43 has a surface light emitter. EL 44 and a liquid crystal panel 45 are placed, and a touch panel 47 is overlaid on the liquid crystal panel 45 via a spacer 46, and an upper case 48 is overlaid thereon. By engaging with the lower case 41 in a detachable manner, the liquid crystal panel holder 43, the EL 44, the liquid crystal panel 45, and the touch panel 47 are held in the vertical direction.
[0006]
As described above, a liquid crystal display device using a transflective liquid crystal can be seen in a portable terminal because it can reduce power consumption by switching on / off of illumination. There is a drawback that the contrast between the character and the base drops. Further, the EL 44 as a backlight has a drawback that it has a short life and must be considered for maintenance.
[0007]
In addition, the reflective type is a method in which external light is reflected to view a liquid crystal display, and has features that power consumption is kept low and contrast is easy to see.
[0008]
[Problems to be solved by the invention]
However, as described above, the liquid crystal display device using the reflective liquid crystal has a good contrast between the characters on the screen and the surroundings. However, since the display is visually recognized by external light, there is a problem that the display cannot be seen in a dark place.
[0009]
The present invention has been made paying attention to the above-mentioned problems, and the object of the present invention is to easily provide illumination as outside light in a dark place by utilizing a high-contrast by using a reflective liquid crystal. An object of the present invention is to provide a portable electronic device capable of improving visual recognition of a display and suppressing power consumption as much as possible.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a portable electronic device according to the invention of claim 1 is a portable electronic device using a reflective liquid crystal panel as a display device, and the incident light is reflected in the device body. a light guide member for guiding the liquid crystal panel side, a light source and a reflector for guiding light from the light source to the light guide member, the uniform light is guided light is provided to the incident part of the light guide member enters the reflector a diffusion sheet for diffusing, characterized in that have a transparent plate-like body disposed on the front side of the light guide member.
[0011]
In order to achieve the above object, a portable electronic device according to a second aspect of the present invention is the portable electronic device according to the first aspect, wherein the plate-like body is a touch panel.
[0015]
In order to achieve the above object, a portable electronic device according to a third aspect of the present invention is a portable electronic device according to the first aspect , wherein the portable electronic device is a light source arranged in a positional relationship that is not linear with the incident portion. and certain light emitting diode, a reflector emitting diodes by positioning on another electronic component flush mounted on the main board, provided at an angle relative to the incident portion provided between the light-emitting diode and the entrance portion It was to be closed.
[0017]
With such a configuration, it is possible to easily give illumination as external light in a dark place by using a reflective liquid crystal panel, making it possible to easily display the display, and to suppress power consumption as much as possible. Moreover, the surface of the light guide member can be protected from being scratched or soiled by a transparent plate or touch panel mounted on the light guide member, and the illumination function can be maintained.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
A portable electronic device according to the invention of claim 1 is a portable electronic device using a reflective liquid crystal panel as a display device, and a light guide member that guides incident light to the reflective liquid crystal panel side in the device main body. , light source, a reflector for guiding light from the light source to the light guide member, the diffusion sheet uniformly diffuses the light is guided light is provided to the incident part of the light guide member enters the reflector, the light guide member characterized in that of have a transparent plate-like body disposed on the front side.
[0020]
With such a configuration, it is possible to easily give illumination as external light in a dark place by using a reflective liquid crystal panel, making it possible to easily display the display, and to suppress power consumption as much as possible. In addition, the transparent plate-like body mounted on the upper portion of the light guide member can protect the surface of the light guide member from being damaged or dirty, and the illumination function can be maintained.
[0021]
A portable electronic device according to a second aspect of the present invention is the portable electronic device according to the first aspect, wherein the plate-like body is a touch panel.
[0022]
With this configuration, not only the operational effects similar to the operational effects of the first aspect of the invention described above can be achieved, but also the touch panel mounted on the upper portion of the light guide member can protect the surface of the light guide member from being damaged or soiled. And the lighting function can be maintained.
[0029]
In order to achieve the above object, a portable electronic device according to a third aspect of the present invention is a portable electronic device according to the first aspect , wherein the portable electronic device is a light source arranged in a positional relationship that is not linear with the incident portion. and certain light emitting diode, a reflector emitting diodes by positioning on another electronic component flush mounted on the main board, provided at an angle relative to the incident portion provided between the light emitting diode and the entrance portion It was to be closed.
[0030]
With such a configuration, not only can the operational effects similar to the operational effects of the first aspect of the invention described above be achieved, but it becomes possible to eliminate the light source board, the cable, and the connector, while reducing the size of the device at low cost. Function can be realized.
[0033]
(Embodiment 1)
Embodiment 1 of a portable electronic device according to the present invention is shown in FIGS.
[0034]
The portable electronic device according to the present invention includes a lower case 1, a main substrate 2, a liquid crystal panel holder 3, a reflective liquid crystal panel 4, a light guide member 5, a reflector 6, and a transparent plate-like body. The touch panel 7 and the upper case 8 are configured. The upper and lower cases 1 and 8 constitute a device body.
[0035]
The lower case 1 has a case main body 1A configured by raising a peripheral wall portion 1b around a rectangular bottom surface portion 1a. A battery housing portion 19 is provided at one corner of the case main body 1A. In addition, a mounting seat 20 is formed on the bottom surface portion 1a so as to be close to the three corner portions and the corner portion side of the battery housing portion 19, and near the peripheral wall portion 1b of the bottom surface portion 1a, A plurality of spacers 9 are provided at predetermined intervals in the circumferential direction, and these spacers 9 are constituted by ribs that straddle the bottom surface 1a and the inner surface of the peripheral wall 1b.
[0036]
The main board 2 has a substrate body 2A similar to the shape of the bottom surface portion 1a of the lower case 1, and mounting holes 10 are provided in each corner of the substrate body 2A. A large number of electronic components 11 are mounted on the mounting surface of the substrate body 2A, and the mounting surface of the substrate body 2A is a light emitting diode as a plurality of light sources near one edge 2a in the longitudinal direction. (LED) 12 is mounted at a predetermined interval in the longitudinal direction.
[0037]
The liquid crystal panel holder 3 has a holder main body 3A similar to the shape of the bottom surface portion 1a of the lower case 1. The holder main body 3A is provided with a rectangular surface portion 13 and a periphery of the surface portion 13. The panel support part 14 is made one step higher than the surface part 13 and the frame part 15 outside the panel support part 14, and one side edge part 13 a in the longitudinal direction of the surface part 13 includes A reflector installation portion 16 is formed one step lower than the surface portion 13, and a plurality of light source window portions 17 are formed at predetermined intervals in the longitudinal direction of the reflector installation portion 16. A plurality of openings 18 are formed in the surface portion 13 of the holder main body 3A.
[0038]
The reflective liquid crystal panel 4 is a liquid crystal filled in the gap between the counter electrode plates arranged on the opposite side of the two glass plates 21 and 22.
[0039]
The light guide member 5 is made of a transparent acrylic resin plate (rectangular plate) having a thickness of about 1 to 2 mm, and the surface 5e has V along the longitudinal direction of the light guide member 5. A number of mold grooves 31 are formed in the short direction of the light guide member 5. These grooves 31 are reflections in which one side edge portion 5a of the light guide member 5 in the longitudinal direction, that is, the inclined surface on the light incident portion A side, reflects light C incident from the incident portion A in a substantially perpendicular direction. It is formed on the surface 31A.
[0040]
Moreover, the frame part 23 is provided in the other edge parts 5b, 5c, and 5d except for one edge part 5a in the longitudinal direction of the light guide member 5, and diffusion is performed on the end surface 24 of the one edge part 5a. A sheet 25 is attached. A reflector 6 is attached to one edge portion 5 a of the light guide member 5.
[0041]
That is, the reflector 6 includes an inner reflection plate 26, an outer reflection plate 27, and two end reflection plates 28. The inner reflection plate 26 has a reflection surface portion substantially perpendicular to the mounting portion 26A. 26B is formed, and the outer reflection plate 27 is formed by forming the reflection surface portion 27B at an obtuse angle with respect to the mounting portion 27A. The inner and outer reflectors 26 and 27 are connected to each other through end reflectors 28 so that the mounting portions 26A and 27A are parallel to each other.
[0042]
The reflector 6 is attached to the light guide member 5 such that one side edge portion 5a in the longitudinal direction of the light guide member 5 is inserted between the attachment portions 26A and 27A.
[0043]
The touch panel 7 has a frame portion 29 around the periphery thereof, and the upper case 8 has a rectangular opening window 30 on the surface portion 8A. And the lower electrode (not shown) on the touch panel 7 is made of a film.
[0044]
A main board 2 is accommodated in the lower case 1, and the main board 2 is fixed to the lower case 1 by screwing screws (not shown) inserted into the mounting holes 10 into the mounting seats 20. The spacer 9 supports the peripheral portion of the main board 2. In the lower case 1, a liquid crystal panel holder 3 is accommodated on the main substrate 2, and a back surface portion 16 </ b> A of the reflector installation portion 16 of the liquid crystal panel holder 3 is in contact with the main substrate 2. Each light emitting diode (LED) 12 is inserted into a light source window portion 17 of the reflector installation portion 16. The electronic component 11 mounted on the main board 2 is inserted into the opening 18 provided in the surface portion 13 of the liquid crystal panel holder 3.
[0045]
A reflective liquid crystal panel 4 is placed on the panel support portion 14 of the liquid crystal panel holder 3, and a light guide member 5 is stacked on the reflective liquid crystal panel 4, and is attached to the light guide member 5. The tip portion of the reflector 6 is inserted into the reflector installation portion 16 of the liquid crystal panel holder 3. Further, a touch panel 7 is overlaid on the light guide member 5, and an upper case 8 is overlaid thereon, and the upper case 8 is detachably engaged with the lower case 1, whereby a liquid crystal panel holder is obtained. 3, the reflective liquid crystal panel 4, the light guide member 5, and the touch panel 7 are held in the vertical direction.
[0046]
In this case, the light guide member 5 is disposed at a right angle with respect to the axis line D of the plurality of light emitting diodes (LEDs) 12 that are light sources, and the reflector 6 guides the light R emitted from the light emitting diodes (LEDs) 12. The member 5 is led to one side edge portion 5a in the longitudinal direction, that is, the light incident portion a.
[0047]
Reflecting means for reflecting light, that is, white printing or painting, is applied to the upper surface 16a of the reflector installation portion 16 of the liquid crystal panel holder 3 and the peripheral wall surface 17a of the light source window portion 17 of the reflector installation portion 16. .
[0048]
Next, the behavior of light in the liquid crystal display device configured as described above will be described.
When a plurality of light emitting diodes (LEDs) 12 that are light sources are turned on, light R emitted from these light emitting diodes (LEDs) 12 is reflected from the outer reflectors 26 and 27 and the two end reflectors 28 in the reflector 6. In this case, reflection is repeated, and the light enters the diffusion sheet 25 provided on one side edge 5a in the longitudinal direction of the light guide member 5 and is diffused, and the light that is one side edge 5a in the longitudinal direction of the light guide member 5 is reflected. It is incident on the incident part a.
[0049]
As shown in FIG. 3, a part of the light R incident on the light guide member 5 is reflected by the reflection surfaces 31A of the numerous grooves 31 formed on the surface of the light guide member 5, and the reflected light C is reflected. Is incident on the liquid crystal panel 4 at a substantially right angle.
[0050]
As described above, by replacing the light emitted from the plurality of light emitting diodes (LEDs) 12 with the outside light, the display of the display device using the reflective liquid crystal panel 4 can be visually recognized even in a dark place.
[0051]
Moreover, although the light emitting diodes (LEDs) 12 are point light sources, the number of the light emitting diodes (LEDs) 12 is increased, and the incident light is diffused by the diffusion sheet 25 when entering the light guide member 5, thereby creating uniform light, and the light guide member. It becomes possible to eliminate the light unevenness of reflection of 5. In addition, by using the light emitting diode (LED) 12, it is possible to configure an illumination structure that is inexpensive and can be downsized and the life of the light source component can be extended. In addition, the battery life can be extended due to low power consumption.
[0052]
In addition, the touch panel 7 mounted on the upper portion of the light guide member 5 can protect the groove 31 on the surface of the light guide member 5 from being damaged or dirty, and the illumination function of the light guide member 5 can be maintained.
[0053]
In addition, the light guide member 5 is a transparent acrylic resin plate and has a certain degree of rigidity so that the light guide member 5 is bent and deformed even when an external force is applied from above, and a load is not applied to the liquid crystal surface. Since the thickness is 1 to 2 mm, the liquid crystal surface is loaded even when the touch panel 7 is pressed down from the surface. applied without also reducing the overall thickness of the motor touch panel 7 and the light guide member 5, the display parallax (depth feeling) at the time of the liquid crystal lighting can be reduced (alleviated).
[0054]
The light guide member 5 is disposed at right angles to the axis of the plurality of light emitting diodes (LEDs) 12 that are light sources, and the reflector 7 is provided with an angle to the end surface 5a of the light guide member 5 and the light emitting diodes (LEDs) 12. Guiding light from. As described above, the angle of the reflector 6 makes it possible to reduce the size of the apparatus by arranging the position of the main board 2 on which the light emitting diode (LED) 12 is mounted not only in the depth direction but also in the height direction.
[0055]
Further, since the upper surface 16a of the reflector installation portion 16 of the liquid crystal panel holder 3 and the peripheral wall surface 17a of the light source window portion 17 of the reflector installation portion 16 are white printed or painted so that light is reflected, the reflector is provided. From 7, the light reflected back from the light guide member 5 to the vicinity of the light emitting diode (LED) 12 can be made incident again on the light guide member 5, and the incident efficiency can be improved.
[0056]
For this reason, when the light that should be incident on the light guide member 5 is not incident on the reflector 6 or the shape of the light guide member 5, the bonding condition of the diffusion sheet 25, etc. By dyeing the surroundings in a reflective color, the light passes through the reflector 6 again and is incident on the light guide member 5, so that incident light increases and the light emission efficiency of the light guide member 5 is improved.
[0057]
In addition, since the light emitting diode (LED) 12 as the light source is mounted on the main board 2 on which the other electronic components 11 are mounted, the light source board, the cable, and the connector can be abolished. The function can be realized while miniaturization of the system.
[0058]
(Embodiment 2)
Embodiment 2 of the portable electronic device according to the present invention is shown in FIG.
[0059]
In the second embodiment of the portable electronic device according to the present invention, the light emitting diode (LED) 12 is not directly mounted on the main board 2 but is emitted on the LED board 31 separate from the main board 2. The diode (LED) 12 is mounted, and the other configuration is the same as that of the first embodiment of the portable electronic device, and the description thereof is omitted.
[0060]
In this case, the liquid crystal panel holder 3 does not have the reflector installation portion 16 but has a substrate holding portion 32, and the LED substrate 31 is held in parallel with the main substrate 2 by the substrate holding portion 32. The LED board 31 and the main board 2 are connected by a connector 33 and a cable 34. And the reflector 6-1 with which the light guide member 5 was mounted | worn is the same structure as the reflector 6 in Embodiment 1, and the front part of this reflector 6-1 is contacting the upper surface of the LED board 31, A light emitting diode (LED) 12 is housed in the reflector 6-1.
[0061]
(Embodiment 3)
Embodiment 3 of the portable electronic device according to the present invention is shown in FIG.
[0062]
In the third embodiment of the portable electronic device according to the present invention, the light emitting diode (LED) 12 is not directly mounted on the main board 2, but the LED board 31-1 separate from the main board 2. In this case, the liquid crystal panel holder 3 does not have the reflector installation part 16 but is formed with a substrate holding part 32, and this substrate holding part is provided with the light emitting diode (LED) 12. The LED board 31-1 is held vertically to the main board 2 by 32, and the LED board 31 and the main board 2 are connected by a connector 33 and a cable 34.
[0063]
Further, the reflector 6-2 attached to the light guide member 5 is linear and is horizontally arranged, and the tip portion of the reflector 6-2 is in contact with the upper surface of the LED substrate 31. -2 houses a light emitting diode (LED) 12.
[0064]
【The invention's effect】
As described above, according to the portable electronic device of the present invention, it is possible to easily provide illumination as external light in a dark place by utilizing a high-contrast by using a reflective liquid crystal panel. The visual recognition is good and power consumption can be suppressed as much as possible, and the transparent body plate mounted on the top of the light guide member can protect the surface of the light guide member from being scratched and dirty, and the illumination function Can be maintained.
[0065]
In addition, a light emitting diode is used as a light source for making light incident on the light guide member, and a diffusion sheet for uniformly diffusing the light is disposed on the end surface of the light guide member on which the light guided by the reflector is incident. Although the diode is a point light source, it can increase the number used and diffuse the incident light with the diffusion sheet when entering the light guide member, making uniform light and eliminating the uneven light reflection of the light guide member It becomes. By using the light emitting diode with the above configuration, it is possible to configure an illumination structure that is inexpensive and can be downsized and the life of the light source component can be extended. In addition, the battery life can be extended due to low power consumption.
[0066]
Further, the light guide member is made of a transparent acrylic resin plate having a certain degree of rigidity, and a reflective surface for guiding incident light to the reflective liquid surface panel is formed on the surface of the light guide member. and the thickness of the light guide member, the thickness having a certain degree of rigidity, for example, by a 1 to 2 mm, serve as the stiffness function of the glass plate used in the lower electrode of the conventional touch panel, a touch panel from a surface load is not applied even to the liquid crystal surface by pressing, and can suppress the overall thickness of capacitor touch panel and the light guide member, displays parallax when the liquid crystal lighting (depth feeling) decrease (reduction).
[0067]
In addition, the angle of the reflector and the positional relationship between the end face of the light guide member and the substrate on which the light emitting diode is mounted are not arranged on a straight line, so that the position of the substrate serving as the light source can be obtained by angling the reflector. However, it is possible to reduce the size of the apparatus by arranging them in the height direction as well as the depth direction.
[0068]
In addition, since the light emitting diode is mounted on the main board on the same plane as other electronic components, it is possible to eliminate the light source board, the cable, and the connector, which is inexpensive and small in size. Functions can be realized while realizing
[0069]
In addition, a reflecting means for reflecting the light is provided around the light emitting diode so that the light reflected from the reflector to the vicinity of the light emitting diode without entering the light guiding member is incident again on the light guiding member. As a result, when the light that should be incident on the light guide member is not incident due to the shape of the reflector or the light guide member, the conditions for attaching the diffusion sheet, etc. By being dyed, the light passes through the reflector again and enters the light guide member, so that incident light increases and the light emission efficiency of the light guide member is improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a portable electronic device (Embodiment 1) according to the present invention. FIG. 2 is a cross-sectional view in which the portable electronic device (Embodiment 1) is partially omitted. 3 is an explanatory diagram of light incidence and reflection of a light guide member in the portable electronic device (embodiment 1). FIG. 4 is a part of the portable electronic device (embodiment 2) according to the present invention. FIG. 5 is a partially omitted sectional view of a portable electronic device according to the present invention (Embodiment 3). FIG. 6 is a partially omitted sectional view of a conventional portable electronic device. ]
1 Lower case (equipment main unit)
2 Main board 3 Liquid crystal panel holder 4 Reflective liquid crystal panel 5 Light guide member 6 Reflector 7 Touch panel 8 Upper case (equipment main body)
12 Light emitting diode (light source)

Claims (3)

表示デバイスとして反射型液晶パネルを用いた携帯用電子機器であって、
機器本体内に、入射光を反射型液晶パネル側に導く導光部材と、光源と、前記光源からの光を導光部材に導くリフレクターと、
前記リフレクターにより導かれた光が入射する前記導光部材の入射部に設けた光を一様に拡散させる拡散シートと、
前記導光部材の表側に配置した透明な板状体と
を有したことを特徴とする携帯用電子機器。A portable electronic device using a reflective liquid crystal panel as a display device,
In the device body, a light guide member for guiding incident light to the reflection type liquid crystal panel side, a reflector for guiding a light source, the light from the light source to the light guide member,
A diffusion sheet for uniformly diffusing the light provided in the incident portion of the light guide member on which the light guided by the reflector is incident;
Transparent and plate-like body disposed on the front side of the light guide member
Portable electronic device is characterized in that have a. 前記板状体がタッチパネルである請求項１に記載の携帯用電子機器。The portable electronic device according to claim 1, wherein the plate-like body is a touch panel. 前記入射部と直線上で無い位置関係に配置した前記光源である発光ダイオードと、
前記発光ダイオードが他の電子部品と同一平面上に位置させてメイン基板に実装し、前記発光ダイオードと前記入射部との間に設けた前記入射部に対して角度を持って設けたリフレクターとを有する請求項１に記載の携帯用電子機器。 A light emitting diode that is the light source disposed in a positional relationship that is not linear with the incident portion;
The light emitting diode is mounted on the main board on the same plane as the other electronic components, and a reflector provided at an angle with respect to the incident portion provided between the light emitting diode and the incident portion. portable electronic device according to claim 1 having.
JP13596998A 1998-04-30 1998-04-30 Portable electronic devices Expired - Fee Related JP3644476B2 (en)

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JP13596998A JP3644476B2 (en) 1998-04-30 1998-04-30 Portable electronic devices
GB9910125A GB2336933B (en) 1998-04-30 1999-04-30 Portable electronic apparatus having liquid crystal display device

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GB2336933A (en) 1999-11-03
GB2336933B (en) 2000-12-06
JPH11316553A (en) 1999-11-16

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