JP2003279971A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JP2003279971A JP2003279971A JP2002078656A JP2002078656A JP2003279971A JP 2003279971 A JP2003279971 A JP 2003279971A JP 2002078656 A JP2002078656 A JP 2002078656A JP 2002078656 A JP2002078656 A JP 2002078656A JP 2003279971 A JP2003279971 A JP 2003279971A
- Authority
- JP
- Japan
- Prior art keywords
- light
- liquid crystal
- guide plate
- light guide
- display device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、バックライト光源
を備えた液晶表示装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device having a backlight light source.
【０００２】[0002]
【従来の技術】近年、液晶セルを用いた表示装置は、時
計、電話機、パソコン等のあらゆる電子機器に搭載され
ている。このような電子機器にあって、特に時計や携帯
電話等は夜間や暗所においても使用されるため、液晶セ
ルを照明するバックライトを備えたものが多い。2. Description of the Related Art In recent years, display devices using liquid crystal cells have been installed in all kinds of electronic equipment such as watches, telephones and personal computers. Among such electronic devices, in particular, clocks, mobile phones and the like are used at night or in a dark place, and therefore, many of them have a backlight for illuminating a liquid crystal cell.
【０００３】図４は、バックライトを備えた従来の液晶
表示装置１の一般的な構造を示したものである。この液
晶表示装置１は、液晶セル部２とバックライト部３とを
備え、これらが同一枠体４内に積層された状態で収容さ
れている。前記液晶セル部２は、透明電極膜が形成され
た２枚のガラス基板の間に液晶物質を挟んだ構造の液晶
セル５と、この液晶セル５の上面及び下面に配設される
図示しない２枚の偏光板とで構成されている。バックラ
イト部３は、光源であるＬＥＤ７と、このＬＥＤ７で発
した光を導く導光板８とを備えている。前記導光板８
は、透明なアクリル材で形成され、その一端が液晶セル
５から突出した反射面１０を有する反射部９となってい
る。ＬＥＤ７は各種のＩＣや電子部品が実装される基板
６の先端部に配設され、前記反射部９の下方に発光面１
２を向けた状態で枠体４に固定されている。FIG. 4 shows a general structure of a conventional liquid crystal display device 1 having a backlight. The liquid crystal display device 1 includes a liquid crystal cell unit 2 and a backlight unit 3, which are housed in the same frame body 4 in a stacked state. The liquid crystal cell unit 2 includes a liquid crystal cell 5 having a structure in which a liquid crystal substance is sandwiched between two glass substrates on which a transparent electrode film is formed, and a liquid crystal cell 5 disposed on the upper and lower surfaces of the liquid crystal cell 5 (not shown). It is composed of one polarizing plate. The backlight unit 3 includes an LED 7 that is a light source and a light guide plate 8 that guides light emitted from the LED 7. The light guide plate 8
Is made of a transparent acrylic material, and one end thereof serves as a reflecting portion 9 having a reflecting surface 10 protruding from the liquid crystal cell 5. The LED 7 is arranged at the tip of the substrate 6 on which various ICs and electronic components are mounted, and the light emitting surface 1 is provided below the reflecting portion 9.
It is fixed to the frame body 4 with 2 facing.
【０００４】前記ＬＥＤ７で発した光は、図５に示すよ
うに、放射角αの広がりを持って上方に向かい反射部９
を透過して所定の角度で傾斜した反射面１０で反射され
る。そして、この反射された光は導光板８内に向けて拡
散する。前記反射面１０で反射される光は、ＬＥＤ７に
最も近いａ部では入射角が小さいので、導光板８の最も
ＬＥＤ７に近い下面を照らし、入射角の大きなｂ部で反
射された光はそれよりも遠くを照射する。このようにし
て、導光板８自体を発光させることで、上方に設置され
ている液晶セル５を照明する。なお、前記導光板８の上
面には光を均一に拡散させる光拡散シート１１が設けら
れる場合がある。The light emitted from the LED 7 is directed upward with a spread of the emission angle α, as shown in FIG.
And is reflected by the reflecting surface 10 inclined at a predetermined angle. Then, the reflected light is diffused toward the inside of the light guide plate 8. The light reflected by the reflection surface 10 has a small incident angle at the portion a closest to the LED 7, so the lower surface of the light guide plate 8 closest to the LED 7 is illuminated, and the light reflected at the portion b having a large incident angle is smaller than that. Irradiate far away. In this way, the liquid crystal cell 5 installed above is illuminated by causing the light guide plate 8 itself to emit light. A light diffusion sheet 11 that evenly diffuses light may be provided on the upper surface of the light guide plate 8.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来の液晶表示装置１にあっては、ＬＥＤ７から発せられ
る光が放射角αの広がりを持っているのに対して反射面
１０の傾斜角が一定であるために導光板８の上面あるい
は下面に対して平行な光（以下、平行光という）が得に
くく、反射光が反射部９の近傍を強く照射する傾向にあ
ることから発光ムラが生じるおそれがあった。前記反射
面１０の傾斜角を大きくすることである程度遠くまで光
を到達させることが可能となるが、液晶表示装置のよう
に、非常に薄型の装置にあっては、導光板８の厚み自体
が制限されるため、前記反射面１０の傾斜角が十分確保
できない。このため、導光板８のＬＥＤ７の近傍では発
光輝度が高く、導光板８の先端部では発光輝度が低くな
って、液晶セル５に輝度の明暗差が現れていた。However, in the above-mentioned conventional liquid crystal display device 1, the light emitted from the LED 7 has a wide emission angle α, whereas the inclination angle of the reflecting surface 10 is constant. Therefore, it is difficult to obtain light parallel to the upper surface or the lower surface of the light guide plate 8 (hereinafter referred to as parallel light), and the reflected light tends to strongly irradiate the vicinity of the reflecting portion 9, which may cause uneven light emission. was there. By increasing the inclination angle of the reflection surface 10, it is possible to allow light to reach a certain distance. However, in a very thin device such as a liquid crystal display device, the thickness of the light guide plate 8 itself is small. Due to the limitation, the inclination angle of the reflecting surface 10 cannot be sufficiently secured. Therefore, the light emission brightness is high in the vicinity of the LED 7 of the light guide plate 8, and the light emission brightness is low at the tip portion of the light guide plate 8, and the brightness difference between the brightness appears in the liquid crystal cell 5.
【０００６】そこで、本発明の目的は、ＬＥＤ等のバッ
クライト用の光源を導光板の周囲に備えた液晶表示装置
にあって、前記光源の光を効率よく薄型の導光板内の隅
々まで導くことのできる液晶表示装置を提供するもので
ある。Therefore, an object of the present invention is to provide a liquid crystal display device provided with a light source for a backlight such as an LED around the light guide plate, and to efficiently transmit the light of the light source to every corner of the thin light guide plate. A liquid crystal display device which can be guided.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に、本発明の請求項１に係る液晶表示装置は、導光板
と、この導光板を保持する枠体と、前記導光板に向けて
発光する光源とを備え、前記導光板には光源から入射し
た光を導光板内に導くための反射部が形成されてなるバ
ックライト付の液晶表示装置において、前記導光板の反
射部が曲面構造であることを特徴とする。In order to solve the above problems, a liquid crystal display device according to claim 1 of the present invention is directed toward a light guide plate, a frame body for holding the light guide plate, and the light guide plate. A liquid crystal display device with a backlight, comprising: a light source that emits light; wherein the light guide plate is formed with a reflection part for guiding the light incident from the light source into the light guide plate, wherein the reflection part of the light guide plate has a curved structure. Is characterized in that.
【０００８】この発明によれば、前記反射面を曲面構造
としたので、前記光源から発せられる光の放射角に対応
して反射光の角度を平行光に近づけ易くなった。また、
立ち上がり角度も大きくとれる部分が作られることから
も平行光が得られ易い。そのために、光源から遠い導光
板の先端部まで均等に光を行き渡らせることができると
共に、反射が滑らかで反射ムラの少ないソフトな発光が
得られる。According to the present invention, since the reflecting surface has a curved surface structure, the angle of the reflected light can be easily approximated to the parallel light corresponding to the emission angle of the light emitted from the light source. Also,
It is easy to obtain parallel light because a part with a large rising angle can be formed. Therefore, light can be evenly distributed from the light source to the distal end portion of the light guide plate, and soft light emission with smooth reflection and less uneven reflection can be obtained.
【０００９】また、本発明の請求項２に係る液晶表示装
置は、導光板と、この導光板を保持する枠体と、前記導
光板に向けて発光する光源とを備え、前記導光板には光
源から入射した光を導光板内に導くための反射部が形成
されてなるバックライト付の液晶表示装置において、前
記導光板の反射部が多角面構造であることを特徴とす
る。A liquid crystal display device according to a second aspect of the present invention includes a light guide plate, a frame body that holds the light guide plate, and a light source that emits light toward the light guide plate. In a liquid crystal display device with a backlight in which a reflecting portion for guiding the light incident from the light source into the light guide plate is formed, the reflecting portion of the light guide plate has a polygonal structure.
【００１０】この発明によれば、導光板の反射部が複数
の傾斜角を備えた多角面構造となっているので、これら
多角面の傾斜角を調整することで、光源から発せられる
光の放射角に対応して平行光が得られ易くなった。According to the present invention, since the reflecting portion of the light guide plate has a polygonal surface structure having a plurality of inclination angles, by adjusting the inclination angles of these polygonal surfaces, the radiation of the light emitted from the light source is radiated. It became easier to obtain parallel light according to the angle.
【００１１】[0011]
【発明の実施の形態】以下、添付図面に基づいて本発明
に係る液晶表示装置を詳細に説明する。図１は本発明に
係る第１実施形態の液晶表示装置の断面図、図２は前記
液晶表示装置の反射部の要部断面図である。DETAILED DESCRIPTION OF THE INVENTION A liquid crystal display device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a sectional view of a liquid crystal display device according to a first embodiment of the present invention, and FIG. 2 is a sectional view of a main part of a reflection part of the liquid crystal display device.
【００１２】図１及び図２に示すように、本発明の第１
実施形態の液晶表示装置２１は、バックライト部２３と
液晶セル部２２とを備え、枠体２４にバックライト部２
３、液晶セル部２２の順に積載された構造となってい
る。また、前記枠体２４の最下部には先端部に発光源と
なるＬＥＤ２７が配設された基板２６が組み込まれてい
る。As shown in FIGS. 1 and 2, the first aspect of the present invention is as follows.
The liquid crystal display device 21 of the embodiment includes a backlight unit 23 and a liquid crystal cell unit 22, and the backlight unit 2 is provided in a frame body 24.
3 and the liquid crystal cell section 22 are stacked in this order. At the lowermost part of the frame 24, a substrate 26 having an LED 27, which is a light emitting source, at the tip thereof is incorporated.
【００１３】前記バックライト部２３は、導光板２８
と、ＬＥＤ２７と、このＬＥＤ２７が配設された基板２
６とで構成される。前記導光板２８は、透明なアクリル
板で形成され、液晶セル部２２が載置される本体部２９
ａと液晶セル２５から突出して設けられる反射部２９ｂ
とで一体形成されている。前記本体部２９ａには光拡散
シート３１を挟んで液晶セル２５が載置される。一方の
反射部２９ｂは前記本体部２９ａから突出形成した反射
面３０が形成されている。この反射面３０は、液晶セル
２５の端部から反射部２９ｂの底面の端部に向けて延び
る略１／４円状の曲面形状となっており、前記反射面３
０の略中間部に接する接線ｇと反射部２９ｂの底面から
延びる水平線ｈとが交わる立上り角度βが約４５度とな
っている。このように反射面３０が曲面状に形成され、
且つ立上り角度βも約４５度と大きいので、ＬＥＤ２７
から発せられる光が放射角αの広がりを持っているとし
ても、それぞれの発光角度に応じて平行光に近い反射角
度で反射させることができる。そのために、従来のよう
に反射光が反射部２９ｂの近傍を強く照射することな
く、反射光の多くが導光板２８内をこの導光板２８の上
面あるいは下面に対して略平行に伝播することから、導
光板２８の先端でも十分な輝度が得られると共に、導光
板２８の全体に発光ムラが生じない。なお、本実施形態
では、白色系の塗料を塗布したり、白色系の顔料あるい
は染料を混合した樹脂材で成形した枠体２４が前記反射
面３０に密着しているので、ＬＥＤ２７の光を外部に漏
らさずに反射させることができるが、反射効率をさらに
高めるために、前記反射面３０と枠体２４との間に銀
（Ａｇ）やアルミニウム（Ａｌ）蒸着シート等の高反射
率を有する反射シートが設けられる場合もある。The backlight unit 23 includes a light guide plate 28.
And the LED 27 and the substrate 2 on which the LED 27 is arranged
6 and 6. The light guide plate 28 is formed of a transparent acrylic plate and has a body 29 on which the liquid crystal cell unit 22 is mounted.
a and a reflecting portion 29b provided so as to project from the liquid crystal cell 25
And are integrally formed. The liquid crystal cell 25 is placed on the body portion 29a with the light diffusion sheet 31 interposed therebetween. On one of the reflecting portions 29b, a reflecting surface 30 formed so as to project from the main body portion 29a is formed. The reflecting surface 30 has a curved surface shape of approximately 1/4 circle extending from the end of the liquid crystal cell 25 toward the end of the bottom surface of the reflecting portion 29b.
The rising angle β at which the tangent line g contacting the substantially middle portion of 0 and the horizontal line h extending from the bottom surface of the reflecting portion 29b intersect is about 45 degrees. In this way, the reflecting surface 30 is formed into a curved surface,
Moreover, since the rising angle β is as large as about 45 degrees, the LED 27
Even if the light emitted from the device has a spread of the emission angle α, it can be reflected at a reflection angle close to parallel light according to the respective emission angles. Therefore, unlike the conventional case, most of the reflected light propagates in the light guide plate 28 substantially parallel to the upper surface or the lower surface of the light guide plate 28 without strongly irradiating the vicinity of the reflecting portion 29b with the reflected light. In addition, sufficient brightness can be obtained even at the tip of the light guide plate 28, and uneven light emission does not occur in the entire light guide plate 28. In the present embodiment, since the frame 24 formed by applying a white paint or molding a resin material mixed with a white pigment or dye is in close contact with the reflection surface 30, the light from the LED 27 is emitted to the outside. However, in order to further improve the reflection efficiency, a reflection having a high reflectance such as a silver (Ag) or aluminum (Al) vapor-deposited sheet between the reflection surface 30 and the frame 24 can be reflected. A seat may be provided.
【００１４】ＬＥＤ２７は、前記導光板２８と略同じ大
きさの基板２６の先端部に実装され、発光面３２を前記
反射部２９ｂの下面に向けて配設される。なお、この基
板２６にはＬＥＤ２７の他に、液晶セル部２２を駆動す
るためのＩＣや電子部品が実装される。The LED 27 is mounted on the tip of the substrate 26 having substantially the same size as the light guide plate 28, and is arranged with the light emitting surface 32 facing the lower surface of the reflecting portion 29b. In addition to the LEDs 27, ICs and electronic components for driving the liquid crystal cell unit 22 are mounted on the substrate 26.
【００１５】前記液晶セル部２２は、２枚の図示しない
偏光板によって挟まれた液晶セル２５を備えている。こ
の液晶セル２５は周知のように、相対して配設された上
ガラス基板及び下ガラス基板の内側に上透明電極と下透
明電極及び上配向膜と下配向膜が設けられ、封止部材で
一定の間隔をおいて封止し、その中に液晶物質が封入さ
れた構造となっている。前記偏光板は前記液晶セル２５
の上ガラス基板及び下ガラス基板のそれぞれ外側に一体
に形成されている。The liquid crystal cell section 22 includes a liquid crystal cell 25 sandwiched by two polarizing plates (not shown). As is well known, this liquid crystal cell 25 is provided with an upper transparent electrode, a lower transparent electrode, an upper alignment film and a lower alignment film on the inside of an upper glass substrate and a lower glass substrate, which are arranged opposite to each other, and is a sealing member. It has a structure in which a liquid crystal substance is enclosed in a space which is sealed at regular intervals. The polarizing plate is the liquid crystal cell 25.
They are integrally formed on the outer sides of the upper glass substrate and the lower glass substrate, respectively.
【００１６】なお、本実施形態では、前記反射面３０を
構成する立上り角度βを４５度近辺に設定したが、導光
板２８の厚みが十分確保できない場合は、３０〜４５度
の範囲で設定すれば大きな効果を得ることが可能であ
る。In the present embodiment, the rising angle β constituting the reflecting surface 30 is set to around 45 degrees, but if the thickness of the light guide plate 28 cannot be sufficiently secured, it may be set within the range of 30 to 45 degrees. It is possible to obtain a great effect.
【００１７】図３は第２実施形態の液晶表示装置４１に
おける反射部３９ｂの構成を示したものである。この実
施形態は、導光板３８の反射部３９ｂの反射面４０を多
角面形状としたものである。ＬＥＤ２７からは上記図２
で示したように放射角αの広がりを持って発光するの
で、この発光角度に応じて様々な角度の反射面を形成す
ることによって、平行光に近い反射光をより多く得やす
くなる。この反射面４０は少なくとも傾斜角の異なる２
つの面を持っていることが必要であるが、平行光をより
多く得るためには、３面以上の多角面で構成されるのが
望ましい。また、前記反射面４０を構成する際の傾斜面
の数によって反射角が微妙に変化するので、導光板３８
の厚みや形状に応じて適した多角面数が選択可能であ
る。なお、前記反射面４０の形成角度は４５度近辺に設
定するのが好ましいが、導光板３８の厚みや反射部２９
ｂのスペース等が限られている場合は、３０〜４５度の
範囲でも大きな効果が得られる。FIG. 3 shows the structure of the reflecting portion 39b in the liquid crystal display device 41 of the second embodiment. In this embodiment, the reflecting surface 40 of the reflecting portion 39b of the light guide plate 38 has a polygonal shape. From the LED 27, see FIG.
Since the light is emitted with the spread of the emission angle α as shown in, it becomes easier to obtain a larger amount of reflected light that is close to parallel light by forming reflecting surfaces of various angles according to the emission angle. This reflecting surface 40 has at least 2 different tilt angles.
It is necessary to have three surfaces, but in order to obtain more parallel light, it is desirable to have three or more polygonal surfaces. In addition, since the reflection angle slightly changes depending on the number of inclined surfaces when forming the reflection surface 40, the light guide plate 38.
A suitable number of polygonal faces can be selected according to the thickness and shape of the. It is preferable that the formation angle of the reflection surface 40 is set to about 45 degrees, but the thickness of the light guide plate 38 and the reflection portion 29.
When the space etc. of b is limited, a large effect can be obtained even in the range of 30 to 45 degrees.
【００１８】このように、ＬＥＤ２７からの光が直接当
たる導光板２８，３８の反射面３０，４０が曲面あるい
は多角面構造となるように形成することによって、反射
光が導光板２８，３８の下面や上面に偏ることなく略平
行に導光板２８内に導くことができ、従来光が届きにく
かった導光板２８，３８の先端まで均等に発光させるこ
とができる。また、反射面３０，４０が曲面あるいは多
角面形状にしているので、液晶表示装置２１，４１の薄
型化に伴って導光板２８，３８の厚みが制限されている
場合にも、ある程度導光板２８，３８に平行に反射させ
て均等発光させることが可能である。As described above, by forming the reflecting surfaces 30 and 40 of the light guide plates 28 and 38, which the light from the LEDs 27 directly impinges, to have a curved surface or a polygonal structure, the reflected light is the lower surface of the light guide plates 28 and 38. The light can be guided into the light guide plate 28 substantially in parallel without being biased to the upper surface, and the light can be evenly emitted up to the tips of the light guide plates 28 and 38, which are difficult for the conventional light to reach. In addition, since the reflecting surfaces 30 and 40 are curved or polygonal, even if the thickness of the light guide plates 28 and 38 is limited due to the thinning of the liquid crystal display devices 21 and 41, the light guide plate 28 is to some extent. , 38 to be reflected in parallel with each other so that the light can be uniformly emitted.
【００１９】また、枠体２４の内壁面、特に前記反射面
３０，４０が接する面には白色系の塗料が塗布され、反
射効率を高めているが、さらに反射率を向上させるため
に、前記反射面３０，４０と枠体２４との間に銀（Ａ
ｇ）やアルミニウム（Ａｌ）等の高反射率を有する反射
シートを配設するといった構成もとられる。Further, a white paint is applied to the inner wall surface of the frame body 24, particularly the surface where the reflecting surfaces 30 and 40 are in contact with each other to enhance the reflection efficiency. Between the reflecting surfaces 30 and 40 and the frame 24, silver (A
g) or aluminum (Al) or the like, a reflective sheet having a high reflectance is provided.
【００２０】[0020]
【発明の効果】以上説明したように、本発明に係る液晶
表示装置によれば、導光板の反射面を曲面構造としたの
で、光源から発せられる光の放射角に対応して反射光の
角度を平行光に近づけ易くなった。また、立ち上がり角
度も大きくとれることからも平行光が得られ易い。その
ために、光源から遠い導光板の先端部まで均等に光を行
き渡らせることができると共に、反射が滑らかで反射ム
ラの少ないソフトな発光が得られる。As described above, according to the liquid crystal display device of the present invention, since the reflecting surface of the light guide plate has a curved structure, the angle of the reflected light corresponds to the emission angle of the light emitted from the light source. It became easier to approach the parallel light. Further, since the rising angle can be made large, it is easy to obtain parallel light. Therefore, light can be evenly distributed from the light source to the distal end portion of the light guide plate, and soft light emission with smooth reflection and less uneven reflection can be obtained.
【００２１】また、前記反射面を傾斜角が様々に変化す
る多角面構造とした場合は、これら多角面の傾斜角を調
整することで、光源から発せられる光の放射角に対応し
て平行光が得られ易くなった。Further, when the reflecting surface has a polygonal structure in which the inclination angle changes variously, by adjusting the inclination angles of these polygonal surfaces, the parallel light is emitted corresponding to the emission angle of the light emitted from the light source. Became easier to obtain.
【図１】本発明の第１実施形態における液晶表示装置の
断面図である。FIG. 1 is a cross-sectional view of a liquid crystal display device according to a first embodiment of the present invention.
【図２】上記図１の液晶表示装置の反射部の要部断面図
である。FIG. 2 is a cross-sectional view of a main part of a reflecting portion of the liquid crystal display device of FIG.
【図３】本発明の第２実施形態における液晶表示装置の
反射部の要部断面図である。FIG. 3 is a cross-sectional view of a main part of a reflecting portion of a liquid crystal display device according to a second embodiment of the present invention.
【図４】従来の液晶表示装置の断面図である。FIG. 4 is a cross-sectional view of a conventional liquid crystal display device.
【図５】上記従来の液晶表示装置のバックライト部の要
部断面図である。FIG. 5 is a cross-sectional view of a main part of a backlight unit of the conventional liquid crystal display device.
２１，４１ 液晶表示装置 ２２ 液晶セル部 ２３ バックライト部 ２５ 液晶セル ２７ ＬＥＤ ２８，３８ 導光板 ２９ａ，３９ｂ 本体部 ２９ｂ，３９ｂ 反射部 ３０，４０ 反射面 21,41 Liquid crystal display device 22 Liquid crystal cell section 23 Backlight part 25 liquid crystal cell 27 LEDs 28,38 Light guide plate 29a, 39b Main body 29b, 39b Reflector 30,40 reflective surface
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｆ２１Ｙ 101:02 Ｆ２１Ｙ 101:02 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 Identification code FI theme code (reference) // F21Y 101: 02 F21Y 101: 02
Claims (2)
と、前記導光板に向けて発光する光源とを備え、前記導
光板には光源から入射した光を導光板内に導くための反
射部が形成されてなるバックライト付の液晶表示装置に
おいて、 前記導光板の反射部が曲面構造であることを特徴とする
液晶表示装置。1. A light guide plate, a frame body that holds the light guide plate, and a light source that emits light toward the light guide plate, wherein the light guide plate guides light incident from the light source into the light guide plate. A liquid crystal display device with a backlight having a reflection portion formed therein, wherein the reflection portion of the light guide plate has a curved structure.
と、前記導光板に向けて発光する光源とを備え、前記導
光板には光源から入射した光を導光板内に導くための反
射部が形成されてなるバックライト付の液晶表示装置に
おいて、 前記導光板の反射部が多角面構造であることを特徴とす
る液晶表示装置。2. A light guide plate, a frame body that holds the light guide plate, and a light source that emits light toward the light guide plate, wherein the light guide plate guides light incident from the light source into the light guide plate. A liquid crystal display device with a backlight, wherein a reflective portion is formed, wherein the reflective portion of the light guide plate has a polygonal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002078656A JP2003279971A (en) | 2002-03-20 | 2002-03-20 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002078656A JP2003279971A (en) | 2002-03-20 | 2002-03-20 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003279971A true JP2003279971A (en) | 2003-10-02 |
Family
ID=29228491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002078656A Pending JP2003279971A (en) | 2002-03-20 | 2002-03-20 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003279971A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202005004676U1 (en) * | 2005-03-22 | 2006-08-03 | Aeg Gesellschaft für Moderne Informationssysteme mbH | Transreflective LCD device, has diffusing panel arranged behind LCD-unit, LED arranged in border area surrounding panel and unit, and light reflecting device having reflector concavely curved from LED to reflect light to panel/unit |
| GB2443215A (en) * | 2006-10-24 | 2008-04-30 | Sharp Kk | An illumination system having a light source and a light guide |
| KR100834980B1 (en) * | 2006-01-03 | 2008-06-03 | 포워드 일렉트로닉스 컴퍼니 리미티드 | Backlight Module for Flat Panel Display Device |
| JP2011113752A (en) * | 2009-11-25 | 2011-06-09 | Panasonic Electric Works Co Ltd | Backlight unit and display device using this |
| CN102621744A (en) * | 2012-04-16 | 2012-08-01 | 深圳市华星光电技术有限公司 | Liquid crystal display device |
| CN102865516A (en) * | 2012-09-28 | 2013-01-09 | 广州创维平面显示科技有限公司 | Backlight module and light-emitting diode (LED) display |
| JP2014086405A (en) * | 2012-10-26 | 2014-05-12 | Panasonic Corp | Lighting equipment |
| JP2014154349A (en) * | 2013-02-08 | 2014-08-25 | Panasonic Corp | Lighting fixture |
| US11757063B2 (en) | 2019-12-27 | 2023-09-12 | Nichia Corporation | Method for manufacturing linear light source |
-
2002
- 2002-03-20 JP JP2002078656A patent/JP2003279971A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202005004676U1 (en) * | 2005-03-22 | 2006-08-03 | Aeg Gesellschaft für Moderne Informationssysteme mbH | Transreflective LCD device, has diffusing panel arranged behind LCD-unit, LED arranged in border area surrounding panel and unit, and light reflecting device having reflector concavely curved from LED to reflect light to panel/unit |
| KR100834980B1 (en) * | 2006-01-03 | 2008-06-03 | 포워드 일렉트로닉스 컴퍼니 리미티드 | Backlight Module for Flat Panel Display Device |
| US8136955B2 (en) | 2006-10-24 | 2012-03-20 | Sharp Kabushiki Kaisha | Illumination system and display including same |
| EP2100184A1 (en) * | 2006-10-24 | 2009-09-16 | Sharp Kabushiki Kaisha | Illumination system and display including same |
| GB2443215A (en) * | 2006-10-24 | 2008-04-30 | Sharp Kk | An illumination system having a light source and a light guide |
| EP2100184A4 (en) * | 2006-10-24 | 2012-05-09 | Sharp Kk | Illumination system and display including same |
| JP2011113752A (en) * | 2009-11-25 | 2011-06-09 | Panasonic Electric Works Co Ltd | Backlight unit and display device using this |
| CN102141219A (en) * | 2009-11-25 | 2011-08-03 | 松下电工神视株式会社 | Backlight unit and display device using same |
| CN102621744A (en) * | 2012-04-16 | 2012-08-01 | 深圳市华星光电技术有限公司 | Liquid crystal display device |
| CN102865516A (en) * | 2012-09-28 | 2013-01-09 | 广州创维平面显示科技有限公司 | Backlight module and light-emitting diode (LED) display |
| JP2014086405A (en) * | 2012-10-26 | 2014-05-12 | Panasonic Corp | Lighting equipment |
| JP2014154349A (en) * | 2013-02-08 | 2014-08-25 | Panasonic Corp | Lighting fixture |
| US11757063B2 (en) | 2019-12-27 | 2023-09-12 | Nichia Corporation | Method for manufacturing linear light source |
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