JP4549502B2 - Liquid crystal display backlight structure - Google Patents

Liquid crystal display backlight structure Download PDF

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Publication number
JP4549502B2
JP4549502B2 JP2000263185A JP2000263185A JP4549502B2 JP 4549502 B2 JP4549502 B2 JP 4549502B2 JP 2000263185 A JP2000263185 A JP 2000263185A JP 2000263185 A JP2000263185 A JP 2000263185A JP 4549502 B2 JP4549502 B2 JP 4549502B2
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Japan
Prior art keywords
guide plate
wedge
light guide
light
light source
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JP2000263185A
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JP2002072204A (en
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勝彦 諏訪
忠 松延
榮三郎 樋口
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Panasonic Corp
Nitto Jushi Kogyo Co Ltd
Panasonic Holdings Corp
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Panasonic Corp
Nitto Jushi Kogyo Co Ltd
Matsushita Electric Industrial Co Ltd
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【０００１】
【発明の属する技術分野】
本発明は、液晶表示体装置のバックライト構造の高輝度化に関するものである。
【０００２】
【従来の技術】
従来、パーソナルコンピュータ等に使用されていた液晶表示体バックライト構造では、表示体画面とほぼ同一面積を有した導光板を使用していた。
【０００３】
以下、従来の液晶表示体バックライト構造について図６を用いて説明する。
【０００４】
図６は、液晶表示体バックライト構造の斜視図である。
【０００５】
図６において、１１は液晶表示体、１２は液晶表示体１１とほぼ同一面積である導光板、１３は導光板１２とほぼ同一面積である反射シート、１４は導光板１２の入光面に配置される光源、１５は光源１４を包括する金属反射板である。
【０００６】
【発明が解決しようとする課題】
上記従来の液晶表示体バックライト構造では、輝度を向上させようとした場合、光源１４を明るくする以外に方法は無かった。光源１４を１本使用した場合、その輝度は１２０ｃｄ〜２５０ｃｄ程度である。
【０００７】
しかしながら、近年、アウトドアで使用される液晶表示体を有した電子機器
、例えば、ビデオムービーやデジタルカメラ、携帯電話等の普及が著しい。
【０００８】
また、カーナビゲーション等も普及しつつある。
【０００９】
こういった外光が強いところでの使用においては、外光に液晶表示体の明るさが負けてしまって画面が見難いといった問題があった。
【００１０】
本発明は、液晶表示体バックライト構造において、高輝度化を可能にすることを目的とする。
【００１１】
【課題を解決するための手段】
上記課題を解決するために本発明の液晶表示体バックライト構造体は、液晶表示体の縦又は横方向の長さを複数個に分割した長さのくさび型導光板と、前記くさび型導光板の前記液晶表示体と反対側に配置される反射シートと、前記くさび型導光板の入光面側に配置される光源と、前記光源を包み前記くさび型導光板の入光面幅よりも開口面が小さい金属反射板ａと、前記くさび型導光板の入光面と前記金属反射板ａと前記反射シートとを内側に配置する金属反射板ｂと、前記金属反射板ａと前記金属反射板ｂとの間に配置される前記光源のリード線と、前記くさび型導光板と前記反射シートと前記光源と前記リード線と前記金属反射板ａと前記金属反射板ｂとで構成される導光板ブロックが複数個取付けられ、取付けられた複数個の前記導光板ブロックに沿った形状の波型形状フレームとを有しており、前記反射シートはマット状の銀コーティングされ、前記くさび型導光板の入光面より前記光源側に飛び出しており、前記くさび型導光板の面に対応する部分は銀コーティングされ、前記くさび型導光板の入光面よりも前記光源側に飛び出している部分は白色反射シートであるものである。
【００１２】
【発明の実施の形態】
請求項１記載の発明は、液晶表示体の縦又は横方向の長さを複数個に分割した長さのくさび型導光板と、くさび型導光板の液晶表示体と反対側に配置される反射シートと、くさび型導光板の入光面側に配置される光源と、光源を包みくさび型導光板の入光面幅よりも開口面が小さい金属反射板ａと、くさび型導光板の入光面と金属反射板ａと反射シートとを内側に配置する金属反射板ｂと、金属反射板ａと金属反射板ｂとの間に配置される光源のリード線と、くさび型導光板と反射シートと光源とリード線と金属反射板ａと金属反射板ｂとで構成される導光板ブロックが複数個取付けられ、取付けられた複数個の導光板ブロックに沿った形状の波型形状フレームとを有しており、前記反射シートはマット状の銀コーティングされて、くさび型導光板の入光面より光源側に飛び出しており、くさび型導光板の面に対応する部分は銀コーティングされ、くさび型導光板の入光面よりも光源側に飛び出している部分は白色反射シートである液晶表示体バックライト構造体であり、光源の効率を最もロス無く活用できると共に、銀コーティングの表面がマット状であるため、光源から発せられくさび型導光板に入光した光が反射シート側に出光した光がマット状になっている銀コーティング面で乱反射され輝度の向上が図れ、金属反射板とくさび型導光板との境界の隙間から漏れてしまう光が反射シートの白色反射シート部分で反射させてくさび型導光板に入光されるために輝度の向上が図れる。
【００１３】
請求項２記載の発明は、液晶表示体の縦又は横方向の長さを複数個に分割した長さのくさび型導光板と、くさび型導光板の液晶表示体と反対側に配置される反射シートと、くさび型導光板の入光面側に配置される光源と、くさび型導光板の入光面と光源と反射シートを内側に配置する金属反射板と、くさび型導光板と反射シートと光源と金属反射板とで構成される導光板ブロックが複数個取付けられ、取付けられた複数個の導光板ブロックに沿った形状の波型形状フレームとを有し、導光板ブロックと波型形状フレームとの間に光源のリード線が配置されており、反射シートはマット状の銀コーティングされ、くさび型導光板の入光面より光源側に飛び出しており、くさび型導光板の面に対応する部分は銀コーティングされ、くさび型導光板の入光面よりも光源側に飛び出している部分は白色反射シートである液晶表示体バックライト構造体であり、光源から発せられ、くさび型導光板に入光し反射シート側に出光した光が、反射シートの銀コーティングのマット状表面で乱反射されることで輝度の向上が図れ、複数個の導光板ブロックを波型形状フレームに容易に並べて組立てでき、金属反射板とくさび型導光板との境界の隙間から漏れてしまう光が反射シートの白色反射シート部分で反射させてくさび型導光板に入光されるために輝度の向上が図れる。
【００１４】
請求項３記載の発明は、液晶表示体の縦又は横方向の長さを複数個に分割した長さのくさび型導光板と、くさび型導光板の液晶表示体と反対側に配置される反射シートと、くさび型導光板の入光面側に配置される光源と、光源のリード線と、くさび型導光板の入光面と光源とリード線と反射シートとを内側に配置する金属反射板と、くさび型導光板と反射シートと光源とリード線と金属反射板とで構成される導光板ブロックが複数個取付けられ、取付けられた複数個の導光板ブロックに沿った形状の波型形状フレームとを有しており、反射シートはマット状の銀コーティングされ、くさび型導光板の入光面より光源側に飛び出しており、くさび型導光板の面に対応する部分は銀コーティングされ、くさび型導光板の入光面よりも光源側に飛び出している部分は白色反射シートである液晶表示体バックライト構造体であり、光源から発せられ、くさび型導光板に入光し反射シート側に出光した光が、反射シートの銀コーティングのマット状表面で乱反射されることで輝度の向上が図れ、複数個の導光板ブロックを波型形状フレームに容易に並べて組立てでき、かつ、光源を液晶表示体バックライト構造体を側面から挿抜できることで分解・組立の作業効率の向上が図れ、金属反射板とくさび型導光板との境界の隙間から漏れてしまう光が反射シートの白色反射シート部分で反射させてくさび型導光板に入光されるために輝度の向上が図れる。
【００１５】
以下、本発明の実施の形態について図１〜５を用いて説明する。
【００１６】
（実施の形態１）
図１は、本実施の形態における液晶表示体バックライト構造を示す断面図である。
【００１７】
図１において、１は液晶表示体、２は液晶表示体１の画面に対して縦方向又は横方向に複数個分割した長さを有するくさび型導光板、３はくさび型導光板２の液晶表示体１と反対側に配置される反射シート、４はくさび型導光板２の入光面側に配置される光源、５は光源４を包みくさび型導光板２の入光面の幅よりも開口面が小さい金属反射板ａ、６は金属反射板ａ５を包みくさび型導光板２の入光面幅よりも広くくさび型導光板２に配置された反射シート３も内側に配置する金属反射板ｂ、４ａは金属反射板ａ５と金属反射板ｂ６との間にくさび型導光板２の入光面と反対側に配置される光源４のリード線、７はくさび型導光板２、反射シート３、光源４、金属反射板ａ５、金属反射板ｂ６から成る導光板ブロックを複数個取付けられるくさび型導光板の形状に沿った形状の波型形状フレームである。
【００１８】
図２は、本実施の形態における液晶表示体バックライト構造の反射シート３を示す平面図である。
【００１９】
反射シート３は、くさび型導光板２の長手方向の両端付近２箇所で固定部材３ａで固定・保持されている。
【００２０】
また、反射シート３は、くさび型導光板２の入光面より光源４側に飛び出しており、その飛び出し量は金属反射板ａ５の開口部端面とくさび型導光板２の入光面との隙間区間以上の十分長いものである。
【００２１】
また、反射シート３は、くさび型導光板２の面に対応する部分が銀コーティング３ｂされており、くさび型導光板２の入光面よりも光源４側に飛び出している部分は白色の反射シート３ｃになっている。
【００２２】
なお、銀コーティング３ｂの表面は平滑な鏡面ではなく、１０μｍから５０μｍの凹凸の有るマット状になっている。
【００２３】
図３は、ユニット化された光源４の断面図である。
【００２４】
図３において、４ｂおよび４ｃは光源４の両端部分にあり金属反射板ａ５で挟んで保持されるゴム部材ａおよびゴム部材ｂである。
【００２５】
以上のように構成された液晶表示体バックライト構造において、光源４から発せられた光はくさび型導光板２の入光面より入るが、くさび型導光板２の反対側に発せられた光は金属反射板ａ５により反射してくさび型導光板２の入光面よりくさび型導光板２内に入る為、光源４の発した光が損失をすることなく、効率良く入り、かつ入光面から入った光が、反射シート３のマット状の部分で乱反射して、再度くさび型導光板２内に効率良く入る。
【００２６】
さらに、液晶表示体１の画面に対して縦方向又は横方向に複数個に分割して導光板ブロックを形成する為、光源４の数により異なるが輝度が３００ｃｄ〜１３００ｃｄの輝度を達成することができる。
【００２７】
また、反射シート３がくさび型導光板２に固定されていることにより、金属反射板ａ５に挿入する際にも、反射シート３はくさび型導光板２との位置が変化せず一定になって挿入しやすくなっている。
【００２８】
また、くさび型導光板２は金属反射板ａ５に挿入されることで、波型形状フレーム７に安定して挿入可能である。
【００２９】
また、光源４を金属反射板ｂ６とユニット化することにより、液晶表示体バックライトブロックの横方向又は縦方向の複数個の光源４の組立てが容易となる。
【００３０】
さらに、液晶表示体バックライトブロックの側面方向からの複数個の光源４の交換が容易になる。
【００３１】
さらに、光源４と金属反射板ａ５との距離が一定となって、安定した輝度を常に確保できる。
【００３２】
さらに、金属反射板ｂ６で光源４を包括することで、光源４を挿入する際の光源４の破損を減少することもできる。
【００３３】
（実施の形態２）
図４は、本実施の形態の液晶表示体バックライトブロック構造を示す断面図である。
【００３４】
図４において、第１の実施の形態と同じものは、同一の番号を付し説明を省略する。
【００３５】
図４において、第１の実施の形態と異なるところは、金属反射板ａ５を無くして光源４のリード線４ａを金属反射板ｂ６の外側に配置させたことである。
【００３６】
以上のように構成された液晶表示体バックライト構造において、光源４を交換しない仕様の液晶表示体の場合、組立性が第１の実施の形態の液晶表示体バックライト構造よりも向上し、量産性が３０％程度向上する。
【００３７】
また、部品点数も削減できることより、製造コストも削減できる。
【００３８】
（実施の形態３）
図５は、本実施の形態の液晶表示体バックライトブロック構造を示す断面図である。
【００３９】
図５において、第１の実施の形態と同じものは、同一の番号を付し説明を省略する。
【００４０】
図５において、第２の実施の形態と異なるところは、光源４のリード線４ａを光源４と金属反射板ｂ６との間に配置させたことである。
【００４１】
以上のように構成された液晶表示体バックライト構造において、光源４を交換する仕様の液晶表示体の場合、光源４が液晶表示体バックライト構造の側面方向より挿抜できることで光源４の交換性が第２の実施の形態の液晶表示体バックライト構造より向上し、サービス性が５０％程度向上する。
【００４２】
【発明の効果】
以上のように、本発明によれば、液晶表示体バックライト構造をくさび型導光板と反射シート、光源、金属反射板ａ、金属反射板ｂから成る導光板ブロックを縦方向又は横方向に複数個取付けられる様にすることで、個数分の輝度が向上される。
【００４３】
また、液晶表示体バックライトブロックの側面方向から複数個の光源の組立てや交換が容易にできるため、作業効率の向上、及び、サービス性の向上が図れる。
【図面の簡単な説明】
【図１】 本発明の第１の実施の形態における液晶表示体バックライト構造の断面図
【図２】 本発明の第１の実施の形態における液晶表示体バックライト構造の反射シートの平面図
【図３】 本発明の第１の実施の形態における液晶表示体バックライト構造の光源ユニットの断面図
【図４】 本発明の第２の実施の形態における液晶表示体バックライト構造の断面図
【図５】 本発明の第３の実施の形態における液晶表示体バックライト構造の断面図
【図６】 従来の液晶表示体バックライト構造の断面図
【符号の説明】
１ 液晶表示体
２ くさび型導光板
３ 反射シート
４ 光源
４ａ リード線
５ 金属反射板ａ
６ 金属反射板ｂ
７ 波型形状フレーム[0001]
BACKGROUND OF THE INVENTION
The present invention relates to increasing the brightness of a backlight structure of a liquid crystal display device.
[0002]
[Prior art]
Conventionally, in a liquid crystal display backlight structure used in a personal computer or the like, a light guide plate having substantially the same area as the display screen is used.
[0003]
Hereinafter, a conventional liquid crystal display backlight structure will be described with reference to FIG.
[0004]
FIG. 6 is a perspective view of a liquid crystal display backlight structure.
[0005]
In FIG. 6, 11 is a liquid crystal display, 12 is a light guide plate having substantially the same area as the liquid crystal display 11, 13 is a reflection sheet having substantially the same area as the light guide plate 12, and 14 is disposed on the light incident surface of the light guide plate 12. The light source 15 is a metal reflector including the light source 14.
[0006]
[Problems to be solved by the invention]
In the conventional liquid crystal display backlight structure described above, there was no method other than brightening the light source 14 in order to improve the luminance. When one light source 14 is used, the luminance is about 120 cd to 250 cd.
[0007]
However, in recent years, electronic devices having a liquid crystal display used in the outdoors, such as video movies, digital cameras, mobile phones, etc., have become very popular.
[0008]
Car navigation and the like are also becoming popular.
[0009]
When used in such a place where the external light is strong, there has been a problem that it is difficult to see the screen because the brightness of the liquid crystal display is lost by the external light.
[0010]
An object of the present invention is to enable high luminance in a liquid crystal display backlight structure.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, a liquid crystal display backlight structure according to the present invention includes a wedge-shaped light guide plate having a length obtained by dividing a length of a liquid crystal display body in a vertical or horizontal direction into a plurality, and the wedge-shaped light guide plate. a reflection sheet disposed the liquid crystal display of the opposite side, a light source that will be placed on the light incident surface side of the wedge-type light guide plate, than the incident surface width of the wedge-type light guide plate wrapped the light source A metal reflector a having a small opening surface, a light incident surface of the wedge-shaped light guide plate, a metal reflector b in which the metal reflector a and the reflector sheet are disposed inside, the metal reflector a and the metal reflector The light source lead arranged between the plate b, the wedge-shaped light guide plate, the reflection sheet, the light source, the lead wire, the metal reflection plate a, and the metal reflection plate b. A plurality of optical plate blocks are attached, and a plurality of attached light guide blocks are attached. Has a corrugated shape frame shape along the plate block, the reflective sheet is matted silver coating, said and jump out to the light source side of the incident surface of the wedge-type light guide plate, the wedge type portion corresponding to the surface of the light guide plate is silver coating, a portion which protrudes to the light source side than the light incident surface of the wedge-type light guide plate is a white reflecting sheet der shall.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, there is provided a wedge-shaped light guide plate having a length obtained by dividing the vertical or horizontal length of the liquid crystal display body into a plurality of pieces, and a reflection disposed on the opposite side of the wedge-shaped light guide plate from the liquid crystal display body. A sheet, a light source disposed on the light incident surface side of the wedge-shaped light guide plate, a metal reflector a that wraps the light source and has a smaller opening surface than the light incident surface width of the wedge-shaped light guide plate, and light incident on the wedge-shaped light guide plate A metal reflecting plate b in which the surface, the metal reflecting plate a and the reflecting sheet are arranged inside, a lead wire of a light source arranged between the metal reflecting plate a and the metal reflecting plate b, a wedge-shaped light guide plate and a reflecting sheet A plurality of light guide plate blocks each including a light source, a lead wire, a metal reflector a, and a metal reflector b, and a corrugated frame having a shape along the plurality of light guide plate blocks. and is, the reflection sheet is matted silver coating, wedge The part that corresponds to the surface of the wedge-shaped light guide plate is silver-coated, and the part that protrudes from the light incident surface of the wedge-shaped light guide plate to the light source side is a white reflective sheet. Oh Ru is a liquid crystal display element backlight structural body, with the efficiency of the light source can be utilized most without loss, since the surface of the silver coating is matted, light entering the wedge light guide plate is emitted from the light source reflection sheet Light reflected from the side is diffusely reflected by the matte silver coating surface to improve brightness, and the light that leaks from the gap between the metal reflector and the wedge-shaped light guide plate is reflected in the white reflector sheet in Ru model improves brightness in order to be incident on the wedge light guide plate is reflected.
[0013]
According to a second aspect of the present invention, there is provided a wedge-shaped light guide plate having a length obtained by dividing the vertical or horizontal length of the liquid crystal display body into a plurality of pieces, and a reflection disposed on the opposite side of the wedge-type light guide plate from the liquid crystal display body. A sheet, a light source disposed on the light incident surface side of the wedge-shaped light guide plate, a metal reflective plate in which the light incident surface of the wedge-shaped light guide plate, the light source, and the reflective sheet are disposed on the inside, a wedge-shaped light guide plate, and a reflective sheet, light source and the metallic reflecting plate and attached plurality light guide plate blocks is composed of, and a corrugated shape frame shape along the plurality of light guide plate blocks attached, the light guide plate block and wave-shaped frame partial light sources of the lead lines are disposed, the reflection sheet is matted silver coating, and jump out to the light source side of the incident surface of the wedge-type light guide plate, which correspond to the surfaces of the wedge-type light guide plate between the Is silver coated and wedge-shaped light guide plate Portion which pop out to the light source side than the light incident surface is a liquid crystal display element backlight structural body is a white reflecting sheet, emitted from the light source, the wedge-shaped incident on the light guide plate light exiting the reflector sheet side, Brightness is improved by irregular reflection on the silver-coated matte surface of the reflective sheet, and a plurality of light guide plate blocks can be easily arranged and assembled in a corrugated frame. The boundary between the metal reflector and the wedge-shaped light guide plate improved light leaks from the gap of the brightness to be incident on the white reflective sheet part is reflected wedge light guide plate of the reflection sheet is Ru Hakare.
[0014]
According to a third aspect of the present invention, there is provided a wedge-shaped light guide plate having a length obtained by dividing the vertical or horizontal length of the liquid crystal display body into a plurality of pieces, and a reflection disposed on the opposite side of the wedge-type light guide plate from the liquid crystal display body. sheet and a light source disposed on the incident surface side of wedge-shaped light guide plate, the metal reflector and the lead wire of the light source, the a light incident surface and the light source and the leads of the wedge-type light guide plate and the reflection sheet is disposed on the inner side A plurality of light guide plate blocks each including a wedge-shaped light guide plate, a reflection sheet, a light source, a lead wire, and a metal reflection plate, and a corrugated frame having a shape along the plurality of light guide plate blocks. The reflective sheet is coated with a mat-shaped silver and protrudes from the light incident surface of the wedge-shaped light guide plate to the light source side. The portion corresponding to the surface of the wedge-shaped light guide plate is coated with silver, and is wedge-shaped. Jumps to the light source side from the light incident surface of the light guide plate To which portion is a liquid crystal display element backlight assembly Ru white reflecting sheets der, emitted from the light source, the light exiting a light incident to the reflective sheet side wedge light guide plate, the silver coating of the reflective sheet mat Brightness can be improved by irregular reflection on the surface, multiple light guide plate blocks can be easily arranged and assembled in a corrugated frame, and the light source can be disassembled by inserting and removing the liquid crystal display backlight structure from the side・ As the assembly work efficiency can be improved , the light leaking from the gap between the metal reflector and the wedge-shaped light guide plate is reflected by the white reflective sheet portion of the reflector sheet and enters the wedge-shaped light guide plate. Ru model improves brightness to.
[0015]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0016]
(Embodiment 1)
FIG. 1 is a cross-sectional view showing a liquid crystal display backlight structure in the present embodiment.
[0017]
In FIG. 1, reference numeral 1 denotes a liquid crystal display, 2 denotes a wedge-shaped light guide plate having a length divided in the vertical or horizontal direction with respect to the screen of the liquid crystal display 1, and 3 denotes a liquid crystal display of the wedge-shaped light guide plate 2. Reflective sheet disposed on the opposite side of the body 1, 4 is a light source disposed on the light incident surface side of the wedge-shaped light guide plate 2, and 5 is a light source 4 that encloses the light source 4 and is wider than the width of the light incident surface of the wedge-shaped light guide plate 2. The metal reflectors a and 6 having a small surface wrap around the metal reflector a5 and are wider than the light incident surface width of the wedge-shaped light guide plate 2 and the metal reflector b arranged on the inside of the wedge-shaped light guide plate 2 as well. 4a is a lead wire of the light source 4 disposed on the side opposite to the light incident surface of the wedge-shaped light guide plate 2 between the metal reflector a5 and the metal reflector b6, 7 is a wedge-shaped light guide plate 2, a reflective sheet 3, A plurality of light guide plate blocks including the light source 4, the metal reflector a5, and the metal reflector b6 can be attached. A wave shape frame shape along the shape of the beauty type light guide plate.
[0018]
FIG. 2 is a plan view showing the reflective sheet 3 having a liquid crystal display backlight structure in the present embodiment.
[0019]
The reflection sheet 3 is fixed and held by fixing members 3 a at two locations near both ends in the longitudinal direction of the wedge-shaped light guide plate 2.
[0020]
The reflection sheet 3 protrudes from the light incident surface of the wedge-shaped light guide plate 2 toward the light source 4, and the amount of protrusion is the gap between the end surface of the opening of the metal reflective plate a 5 and the light incident surface of the wedge-shaped light guide plate 2. It is long enough for the section.
[0021]
The reflective sheet 3 has a silver coating 3b at a portion corresponding to the surface of the wedge-shaped light guide plate 2, and a portion that protrudes toward the light source 4 from the light incident surface of the wedge-shaped light guide plate 2 is a white reflective sheet. It is 3c.
[0022]
In addition, the surface of the silver coating 3b is not a smooth mirror surface, but has a mat shape with unevenness of 10 μm to 50 μm.
[0023]
FIG. 3 is a cross-sectional view of the unitized light source 4.
[0024]
In FIG. 3, 4b and 4c are a rubber member a and a rubber member b that are held at both ends of the light source 4 and held between the metal reflectors a5.
[0025]
In the liquid crystal display backlight structure configured as described above, the light emitted from the light source 4 enters from the light incident surface of the wedge-shaped light guide plate 2, but the light emitted to the opposite side of the wedge-shaped light guide plate 2 Since the light is reflected by the metal reflector a5 and enters the wedge-shaped light guide plate 2 from the light incident surface of the wedge-shaped light guide plate 2, the light emitted from the light source 4 enters efficiently without loss and from the light incident surface. The incident light is irregularly reflected by the mat-like portion of the reflection sheet 3 and efficiently enters the wedge-shaped light guide plate 2 again.
[0026]
Furthermore, since the light guide plate block is formed by dividing the screen of the liquid crystal display 1 into a plurality of portions in the vertical direction or the horizontal direction, the luminance of 300 cd to 1300 cd can be achieved although it varies depending on the number of the light sources 4. it can.
[0027]
Further, since the reflection sheet 3 is fixed to the wedge-shaped light guide plate 2, the position of the reflection sheet 3 with respect to the wedge-shaped light guide plate 2 does not change even when it is inserted into the metal reflection plate a5. Easy to insert.
[0028]
Further, the wedge-shaped light guide plate 2 can be stably inserted into the corrugated frame 7 by being inserted into the metal reflecting plate a5.
[0029]
Further, by unitizing the light source 4 with the metal reflector b6, it is easy to assemble a plurality of light sources 4 in the horizontal direction or the vertical direction of the liquid crystal display backlight block.
[0030]
Furthermore, it becomes easy to replace the plurality of light sources 4 from the side surface direction of the liquid crystal display backlight block.
[0031]
Furthermore, the distance between the light source 4 and the metal reflecting plate a5 is constant, and stable brightness can always be secured.
[0032]
Furthermore, by including the light source 4 with the metal reflector b6, it is possible to reduce damage to the light source 4 when the light source 4 is inserted.
[0033]
(Embodiment 2)
FIG. 4 is a cross-sectional view showing the liquid crystal display backlight block structure of the present embodiment.
[0034]
In FIG. 4, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
[0035]
In FIG. 4, the difference from the first embodiment is that the metal reflection plate a5 is eliminated and the lead wire 4a of the light source 4 is arranged outside the metal reflection plate b6.
[0036]
In the liquid crystal display backlight structure configured as described above, in the case of a liquid crystal display having a specification in which the light source 4 is not replaced, the assemblability is improved as compared with the liquid crystal display backlight structure of the first embodiment, and mass production is performed. The property is improved by about 30%.
[0037]
Further, since the number of parts can be reduced, the manufacturing cost can also be reduced.
[0038]
(Embodiment 3)
FIG. 5 is a cross-sectional view showing the liquid crystal display backlight block structure of the present embodiment.
[0039]
In FIG. 5, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
[0040]
In FIG. 5, the difference from the second embodiment is that the lead wire 4a of the light source 4 is arranged between the light source 4 and the metal reflector b6.
[0041]
In the liquid crystal display backlight structure configured as described above, in the case of a liquid crystal display body with specifications for replacing the light source 4, the light source 4 can be inserted and removed from the side surface direction of the liquid crystal display backlight structure, so that the light source 4 can be exchanged. Compared to the liquid crystal display backlight structure of the second embodiment, the serviceability is improved by about 50%.
[0042]
【The invention's effect】
As described above, according to the present invention, a liquid crystal display backlight structure includes a plurality of light guide plate blocks each including a wedge-shaped light guide plate and a reflection sheet, a light source, a metal reflection plate a, and a metal reflection plate b in a vertical direction or a horizontal direction. By attaching the individual pieces, the luminance for the number is improved.
[0043]
In addition, since a plurality of light sources can be easily assembled and replaced from the side surface direction of the liquid crystal display backlight block, work efficiency and serviceability can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a liquid crystal display backlight structure according to a first embodiment of the present invention. FIG. 2 is a plan view of a reflective sheet of a liquid crystal display backlight structure according to the first embodiment of the present invention. 3 is a cross-sectional view of a light source unit having a liquid crystal display backlight structure according to a first embodiment of the present invention. FIG. 4 is a cross-sectional view of a liquid crystal display backlight structure according to a second embodiment of the present invention. 5 is a cross-sectional view of a liquid crystal display backlight structure according to a third embodiment of the present invention. FIG. 6 is a cross-sectional view of a conventional liquid crystal display backlight structure.
DESCRIPTION OF SYMBOLS 1 Liquid crystal display body 2 Wedge-type light-guide plate 3 Reflective sheet 4 Light source 4a Lead wire 5 Metal reflector a
6 Metal reflector b
7 Wave shape frame

Claims (3)

液晶表示体の縦又は横方向の長さを複数個に分割した長さのくさび型導光板と、前記くさび型導光板の前記液晶表示体と反対側に配置される反射シートと、前記くさび型導光板の入光面側に配置される光源と、前記光源を包み前記くさび型導光板の入光面幅よりも開口面が小さい金属反射板ａと、前記くさび型導光板の入光面と前記金属反射板ａと前記反射シートとを内側に配置する金属反射板ｂと、前記金属反射板ａと前記金属反射板ｂとの間に配置される前記光源のリード線と、前記くさび型導光板と前記反射シートと前記光源と前記リード線と前記金属反射板ａと前記金属反射板ｂとで構成される導光板ブロックが複数個取付けられ、取付けられた複数個の前記導光板ブロックに沿った形状の波型形状フレームとを有しており、前記反射シートはマット状の銀コーティングされ、前記くさび型導光板の入光面より前記光源側に飛び出しており、前記くさび型導光板の面に対応する部分は銀コーティングされ、前記くさび型導光板の入光面よりも前記光源側に飛び出している部分は白色反射シートである液晶表示体バックライト構造体。A wedge-shaped light guide plate having a length obtained by dividing the vertical or horizontal length of the liquid crystal display body into a plurality of pieces, a reflective sheet disposed on the opposite side of the wedge-shaped light guide plate from the liquid crystal display body, and the wedge type A light source disposed on the light incident surface side of the light guide plate, a metal reflector a that encloses the light source and has a smaller opening surface than a light incident surface width of the wedge light guide plate, and a light incident surface of the wedge light guide plate; A metal reflector b in which the metal reflector a and the reflector sheet are disposed inside, a lead wire of the light source disposed between the metal reflector a and the metal reflector b, and the wedge-shaped guide A plurality of light guide plate blocks each including a light plate, the reflection sheet, the light source, the lead wire, the metal reflection plate a, and the metal reflection plate b are attached, and the plurality of light guide plate blocks are attached. And a corrugated frame of a different shape. The sheet is matted silver coating, said and jump out to the light source side of the incident surface of the wedge-type light guide plate, the portion corresponding to the surface of the wedge-type light guide plate is silver coating, entrance of the wedge-type light guide plate liquid crystal layer backlight structural body portion that protrudes to the light source side than the light plane Ru white reflecting sheet der. 液晶表示体の縦又は横方向の長さを複数個に分割した長さのくさび型導光板と、前記くさび型導光板の液晶表示体と反対側に配置される反射シートと、前記くさび型導光板の入光面側に配置される光源と、前記くさび型導光板の入光面と前記光源と前記反射シートとを内側に配置する金属反射板と、前記くさび型導光板と前記反射シートと前記光源と前記金属反射板とで構成される導光板ブロックが複数個取付けられ、取付けられた複数個の前記導光板ブロックに沿った形状の波型形状フレームとを有し、前記導光板ブロックと前記波型形状フレームとの間に前記光源のリード線が配置されており、前記反射シートはマット状の銀コーティングされ、前記くさび型導光板の入光面より前記光源側に飛び出しており、前記くさび型導光板の面に対応する部分は銀コーティングされ、前記くさび型導光板の入光面よりも前記光源側に飛び出している部分は白色反射シートである液晶表示体バックライト構造体。A wedge-shaped light guide plate having a length obtained by dividing the vertical or horizontal length of the liquid crystal display body into a plurality of pieces, a reflective sheet disposed on the opposite side of the wedge-shaped light guide plate from the liquid crystal display body, and the wedge-shaped guide A light source disposed on a light incident surface side of a light plate, a light reflecting surface of the wedge-shaped light guide plate, a metal reflective plate disposed inside the light source and the reflective sheet, the wedge-shaped light guide plate, and the reflective sheet A plurality of light guide plate blocks each composed of the light source and the metal reflector are attached, and each of the light guide plate blocks has a corrugated frame having a shape along the plurality of attached light guide plate blocks. The lead wire of the light source is disposed between the corrugated frame, the reflective sheet is coated with a mat-like silver, and protrudes from the light incident surface of the wedge-shaped light guide plate to the light source side, On the surface of the wedge-shaped light guide plate Portions response is silver coating, a liquid crystal display element backlight structural body portion that protrudes to the light source side than the light incident surface of the wedge-type light guide plate is a white reflecting sheet. 液晶表示体の縦又は横方向の長さを複数個に分割した長さのくさび型導光板と、前記くさび型導光板の液晶表示体と反対側に配置される反射シートと、前記くさび型導光板の入光面側に配置される光源と、前記光源のリード線と、前記くさび型導光板の入光面と前記光源と前記リード線と前記反射シートとを内側に配置する金属反射板と、前記くさび型導光板と前記反射シートと前記光源と前記リード線と前記金属反射板とで構成される導光板ブロックが複数個取付けられ、取付けられた複数個の前記導光板ブロックに沿った形状の波型形状フレームとを有しており、前記反射シートはマット状の銀コーティングされ、前記くさび型導光板の入光面より前記光源側に飛び出しており、前記くさび型導光板の面に対応する部分は銀コーティングされ、前記くさび型導光板の入光面よりも前記光源側に飛び出している部分は白色反射シートである液晶表示体バックライト構造体。A wedge-shaped light guide plate having a length obtained by dividing the vertical or horizontal length of the liquid crystal display body into a plurality of pieces, a reflective sheet disposed on the opposite side of the wedge-shaped light guide plate from the liquid crystal display body, and the wedge-shaped guide A light source disposed on the light incident surface side of the light plate, a lead wire of the light source, a light incident surface of the wedge-shaped light guide plate, a metal reflecting plate that disposes the light source, the lead wire, and the reflection sheet on the inner side; The wedge-shaped light guide plate, the reflective sheet, the light source, the lead wire, and the metal reflective plate are attached to a plurality of light guide plate blocks, and the shape along the attached light guide plate blocks The reflection sheet is coated with a mat-like silver, and protrudes from the light incident surface of the wedge-shaped light guide plate to the light source side, and corresponds to the surface of the wedge-shaped light guide plate. Parts to be coated with silver It is the portion that protrudes to the light source side than the light incident surface of the wedge-type light guide plate Ru white reflecting sheet der LCD body backlight structural body.
JP2000263185A 2000-08-31 2000-08-31 Liquid crystal display backlight structure Expired - Fee Related JP4549502B2 (en)

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