JPS63293506A - Illuminating device for liquid crystal display element - Google Patents
Illuminating device for liquid crystal display elementInfo
- Publication number
- JPS63293506A JPS63293506A JP62129030A JP12903087A JPS63293506A JP S63293506 A JPS63293506 A JP S63293506A JP 62129030 A JP62129030 A JP 62129030A JP 12903087 A JP12903087 A JP 12903087A JP S63293506 A JPS63293506 A JP S63293506A
- Authority
- JP
- Japan
- Prior art keywords
- light
- liquid crystal
- crystal display
- display element
- light guide
- 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.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 76
- 238000005286 illumination Methods 0.000 claims abstract description 19
- 238000003780 insertion Methods 0.000 claims description 25
- 230000037431 insertion Effects 0.000 claims description 25
- 239000003973 paint Substances 0.000 claims description 12
- 239000012780 transparent material Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 4
- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、液晶表示素子の裏面側に配置され該液晶表示
素子に光を照射する液晶表示素子の照明装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an illumination device for a liquid crystal display element, which is arranged on the back side of a liquid crystal display element and irradiates the liquid crystal display element with light.
液晶表示素子を用いた表示装置の中には、該液晶表示素
子の裏面側に照明装置を配置し該照明装置によって液晶
表示素子に光を照射し、該液晶表示素子を透過した光で
文字・数字等を表示するように構成されたものがある。In a display device using a liquid crystal display element, an illumination device is arranged on the back side of the liquid crystal display element, and the illumination device irradiates light onto the liquid crystal display element, and the light transmitted through the liquid crystal display element is used to display characters and characters. Some are configured to display numbers, etc.
第８図はこのような従来の液晶表示素子を用いた表示装
置の概略構造を示す図である。同図に示すように、液晶
表示素子（ＬＣＤ）１０３の裏面側には照明装置１０１
が配置きれ、該液晶表示素子１０３を裏面側から照明す
る。この液晶表示素子の照明装置１０１は縦方向に所定
の長啓を有するケース１０１ａの開放された上面にカラ
ーフィルター１０１ｂを貼り付け、また該ケース１０１
ａの底面にランプ１０１ｃを挿入して構成されている。FIG. 8 is a diagram showing a schematic structure of a display device using such a conventional liquid crystal display element. As shown in the figure, a lighting device 101 is provided on the back side of a liquid crystal display element (LCD) 103.
are arranged, and the liquid crystal display element 103 is illuminated from the back side. This lighting device 101 for a liquid crystal display element includes a case 101a having a predetermined length in the vertical direction, and a color filter 101b attached to the open upper surface of the case 101a.
It is constructed by inserting a lamp 101c into the bottom surface of a.
なお１０３ａは前記液晶表示素子１０３を支えるともに
該液晶表示素子１０３に通電するための端子であり、１
０５は表示装置のフレームであり、１０７は前記液晶表
示素子１０３を保護する透明な保護カバーであり、１０
９は前記照明装置１０１を支持すると共に各種電子部品
を取り付ける基板である。Note that 103a is a terminal for supporting the liquid crystal display element 103 and for supplying electricity to the liquid crystal display element 103;
05 is a frame of the display device, 107 is a transparent protective cover that protects the liquid crystal display element 103, and 10
Reference numeral 9 denotes a board that supports the lighting device 101 and on which various electronic components are attached.
第９図は他の従来の液晶表示素子の照明装置を示す図で
ある。同図に示すようにこの照明装置１０２は薄板状の
乳白色樹脂からなるケース１０２ａの上面に所定形状の
穴を形成し、該穴の長手方向の両側面に発光ダイオード
１０２ｂを配置し、該穴の全体に透明樹脂１０２ｃを充
填する構造としている。この照明装置１０２にあっては
前記発光ダイオード１０２ｂが発する光が前記穴に充填
した透明樹［１１０２ｃの中を乱反射することにより、
該透明樹脂１０２ｃの全面を光らせることができる。FIG. 9 is a diagram showing another conventional illumination device for a liquid crystal display element. As shown in the figure, this lighting device 102 has a hole of a predetermined shape formed in the upper surface of a case 102a made of a thin plate-shaped milky white resin, and light emitting diodes 102b are arranged on both longitudinal sides of the hole. The entire structure is filled with transparent resin 102c. In this illumination device 102, the light emitted by the light emitting diode 102b is diffusely reflected inside the transparent tree [1102c filled in the hole,
The entire surface of the transparent resin 102c can be illuminated.
しかしながら第８図に示す従来の液晶表示素子の照明装
置１０１にあっては、カラーフィルター１０１ｂの全面
を均一に光らせるためには、ランプ１０１Ｃとカラーフ
ィルター１０１ｂとの距離を長くする必要があり、照明
装置の厚み方向の寸法をかなり大きくシナければならな
いという問題点があった。However, in the conventional illumination device 101 for a liquid crystal display element shown in FIG. 8, in order to illuminate the entire surface of the color filter 101b uniformly, it is necessary to increase the distance between the lamp 101C and the color filter 101b, and the illumination There was a problem in that the dimension of the device in the thickness direction had to be considerably increased.
一方第９図に示す従来の液晶表示素子の照明装置１０２
は、薄板状のケース１０２ａで構成されているため照明
装置の縦方向の寸法を小さくできる。しかしながら、発
光ダイオード１０２ｂが発する光の内上方向即ち液晶表
示素子側に向かう光は少ない。このため照明装置１０２
の上面側に配置される液晶表示素子（図示せず）を照明
する光が不足するという問題点があった。On the other hand, a conventional illumination device 102 for a liquid crystal display element shown in FIG.
Since the lighting device is composed of a thin plate-like case 102a, the vertical dimension of the lighting device can be reduced. However, only a small amount of the light emitted by the light emitting diode 102b goes upward, that is, toward the liquid crystal display element. For this reason, the lighting device 102
There was a problem in that there was insufficient light to illuminate a liquid crystal display element (not shown) disposed on the upper surface side of the device.
本発明は上述の点に鑑みてなされたもので１．カラーフ
ィルターの全面を均一に且つ充分に光らせることができ
る薄型の液晶表示素子の照明装置を提供することにある
。The present invention has been made in view of the above points.1. An object of the present invention is to provide an illumination device for a thin liquid crystal display element that can illuminate the entire surface of a color filter uniformly and sufficiently.
上記問題点を解決するため本発明は、液晶表示素子の裏
面側に配置され該液晶表示素子に光を照射する液晶表示
素子の照明装置において、透明な材料で形成された導光
体と該導光体の所定部分に形成された発光素子挿入穴に
挿入された発光素子とを具備し、該発光素子から発射さ
れた光を前記導光体の少なくとも裏面で反射させ液晶表
示素子側に導くことによって構成した。In order to solve the above-mentioned problems, the present invention provides an illumination device for a liquid crystal display element that is arranged on the back side of a liquid crystal display element and irradiates light to the liquid crystal display element. and a light emitting element inserted into a light emitting element insertion hole formed in a predetermined portion of the light body, and the light emitted from the light emitting element is reflected on at least the back surface of the light guide and guided to the liquid crystal display element side. It was constructed by
上記の如く液晶表示素子の照明装置を構成すれば、発光
素子が発する光が直接液晶表示素子を照らさず反射によ
って間接的に液晶表示素子を照らすので、照明装置の縦
方向の寸法をかなり小さくでき、また、反射した光が液
晶表示素子に向かうため液晶表示素子の全面を均一に且
つ充分に光らせることができる。If the lighting device for a liquid crystal display element is configured as described above, the light emitted by the light emitting element does not directly illuminate the liquid crystal display element, but indirectly illuminates the liquid crystal display element by reflection, so the vertical dimension of the lighting device can be considerably reduced. Furthermore, since the reflected light is directed toward the liquid crystal display element, the entire surface of the liquid crystal display element can be uniformly and sufficiently illuminated.
以下、本発明の一実施例を図面に基づいて詳細に説明す
る。Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.
第１図は本発明に係る液晶表示素子の照明装置の一実施
例の断面図である。FIG. 1 is a sectional view of an embodiment of a lighting device for a liquid crystal display element according to the present invention.
同図においてこの液晶表示素子の照明装置１００は、透
明な材料で形成された板状の導光体１と該導光体１の裏
面同側近傍に穿設された発光素子挿入穴１ａ、ｌａに挿
入された発光素子５，５とを具備し、該発光素子５，５
から発射された光５０を前記導光体１の裏面に形成した
傾斜面１ｂ（発光素子５．５に近い側を下方へ傾斜させ
ている）で反射させ上側（液晶表示素子（図示せず）側
）に導くと共に、前記導光体１の表面側をカラーフィル
ター３で覆うことにより前記光５０を路光状に光らせる
ように構成されている。In the figure, a lighting device 100 for a liquid crystal display element includes a plate-shaped light guide 1 made of a transparent material, and light emitting element insertion holes 1a, la bored in the vicinity of the same side of the back surface of the light guide 1. The light emitting elements 5, 5 are inserted into the light emitting elements 5, 5.
The light 50 emitted from the light guide 1 is reflected by an inclined surface 1b (the side closer to the light emitting element 5.5 is inclined downward) formed on the back surface of the light guide 1, and the light 50 is reflected from the upper side (liquid crystal display element (not shown)). By covering the surface side of the light guide 1 with a color filter 3, the light 50 is illuminated in the form of a path light.
以下この実施例の各構成部分を詳細に説明する。Each component of this embodiment will be explained in detail below.
第２図は本実施例の導光体１を示す図で、同図（ａ）は
平面図、同図（ｂ）は同Ｑ（ａ）のＡ−Ａ線上断面矢視
図である。FIG. 2 is a diagram showing the light guide 1 of this embodiment, and FIG. 2(a) is a plan view, and FIG. 2(b) is a sectional view taken along the line A--A of Q(a).
同図において導光体１は、透明な合成樹脂からなる長方
形状の板体で構成されている。この導光体１の表面には
、この導光体１の表面と下記するカラーフィルター３と
の間に所定の間隔を持たせるための凹部１ｃが形成され
、また該凹部１ｃの回りには下記するカラーフィルター
３を貼り付けるための周縁１ｄとなっている。導光体１
の裏面の同側近傍には下記する発光素子５，５を導光体
１内に挿入する一対の発光素子挿入穴１ａ、ｌａが穿設
され、また導光体１の裏面の長手方向の中央部から前記
両売光素子挿入穴１ａ、ｌａに向かっては左右対称に傾
斜面１ｂ、ｌｂが形成されている。この傾斜面１ｂは導
光体１の中央部が薄く、発光素子挿入穴１ａ、ｌａへ向
かって厚くなり、きらに該発光素子挿入穴１ａ、ｌａか
ら外側に向かって薄くなるように傾斜している。発光素
子挿入穴１ａ、ｌａの両側には、導光体１を基板（下記
する）に固定するための突起１ｅ、ｌｅが形成されてい
る。In the figure, a light guide 1 is constituted by a rectangular plate made of transparent synthetic resin. A recess 1c is formed on the surface of the light guide 1 to provide a predetermined distance between the surface of the light guide 1 and a color filter 3, which will be described below. The peripheral edge 1d is for pasting the color filter 3. Light guide 1
A pair of light emitting element insertion holes 1a and 1a for inserting light emitting elements 5, 5 described below into the light guide 1 are bored near the same side of the back surface of the light guide 1. Slanted surfaces 1b, lb are formed symmetrically from the side toward the double optical element insertion holes 1a, la. The inclined surface 1b is thin at the center of the light guide 1, becomes thicker toward the light emitting element insertion holes 1a and la, and is sloped so that it becomes thinner toward the outside from the light emitting element insertion holes 1a and la. There is. Protrusions 1e and le for fixing the light guide 1 to a substrate (described below) are formed on both sides of the light emitting element insertion holes 1a and la.
次に導光体１に各種部材を取り付ける方法を説明する。Next, a method of attaching various members to the light guide 1 will be explained.
まず第３図に示すように導光体１の裏面の両売光素子挿
入穴１ａ、ｌａの間の傾斜面１ｂの全面に一対の発光素
子５，５が発する光５０を反射する反射部材７を取り付
ける。この反射部材７は光を反射する銀色のフィルムで
構成され、透明な接着剤により前記傾斜面１ｂの全面に
貼り付けられる。First, as shown in FIG. 3, a reflecting member 7 reflects the light 50 emitted by the pair of light emitting elements 5, 5 on the entire surface of the inclined surface 1b between the double-sided light element insertion holes 1a and la on the back surface of the light guide 1. Attach. The reflective member 7 is made of a silver film that reflects light, and is attached to the entire surface of the inclined surface 1b using a transparent adhesive.
次にこの反射部材７の裏面全面を含む導光体１の裏面全
面と側面全面に光を反射する不透光性の塗料１ｆを塗布
する。このとき前記発光素子挿入穴ｉａ、ｌａの内部に
もこの塗料１ｆを塗布する。この塗料１ｆは例えば白色
のものを用いる。Next, an opaque paint 1f that reflects light is applied to the entire back surface and side surfaces of the light guide 1, including the entire back surface of the reflecting member 7. At this time, this paint 1f is also applied inside the light emitting element insertion holes ia and la. For example, a white paint is used as this paint 1f.
次に発光素子挿入穴１ａ、ｌａにリーマを通し、該発光
素子挿入穴１ａ、ｌａの側面１ａ−１，１ａ−１に塗布
された塗料１ｆのみを除去し、該発光素子挿入穴１ａ、
ｌａの底面に反射膜９を形成する。Next, a reamer is passed through the light emitting element insertion holes 1a, la, and only the paint 1f applied to the side surfaces 1a-1, 1a-1 of the light emitting element insertion holes 1a, la is removed.
A reflective film 9 is formed on the bottom surface of la.
次に導光体１の上面に形成した周Ｊｌｉｌｄ上に、導光
体１の上面全面を覆う長方形状のカラーフィルター３が
貼り付けられている。このカラーフィルター３の材質は
導光体１から上に向かう光を路光状に乱反射して透過す
るフィルターで構成されている。Next, a rectangular color filter 3 that covers the entire upper surface of the light guide 1 is pasted on the circumference Jlild formed on the upper surface of the light guide 1 . The material of the color filter 3 is a filter that diffusely reflects the light directed upward from the light guide 1 in the form of a path light and transmits it.
このようにして各種部材が取り付けられた導光体１の発
光素子挿入穴１ａ、ｌａに第１図に示すように発光素子
５，５を挿入し、この実施例に係る液晶表示素子の照明
装置１００は完成する。なお導光体１は突起１ｅ、ｌｅ
を熱かしめすることによって基板１３（第４図に示す）
に取り付けられ、また発光素子５．５の端子も基板１３
上に取り付けられる。As shown in FIG. 1, the light emitting elements 5, 5 are inserted into the light emitting element insertion holes 1a, la of the light guide 1 with various members attached in this way, and the lighting device of the liquid crystal display element according to this embodiment is 100 is completed. Note that the light guide 1 has protrusions 1e and le.
By hot caulking the substrate 13 (shown in FIG. 4)
The terminals of the light emitting element 5.5 are also attached to the substrate 13.
mounted on top.
次にこの液晶表示素子の照明装置１００の配置位置を第
４図に示す、同図に示すように、液晶表示素子１１はケ
ース１５の窓１５ａの下部に配置され、基板１３上に固
定された照明装置１ｏ。Next, the arrangement position of the illumination device 100 of this liquid crystal display element is shown in FIG. Lighting device 1o.
は、この液晶表示素子１１の裏面に配置される。is arranged on the back surface of this liquid crystal display element 11.
なお１７は液晶表示素子１１の透明な保護カバー、１９
は該保護カバー１７上に取り付けられた静電シートであ
る。17 is a transparent protective cover for the liquid crystal display element 11; 19 is a transparent protective cover for the liquid crystal display element 11;
is an electrostatic sheet attached on the protective cover 17.
次にこの液晶表示素子の照明装置１００の作用を説明す
る。Next, the operation of the illumination device 100 using this liquid crystal display element will be explained.
第１図に示すように、導光体１の発光素子挿入穴１ａ、
ｌａに挿入した発光素子５，５を発光させる。ここで発
光素子挿入穴１ａ、ｌａの上面は塗料１ｆによって覆わ
れているので、発光素子５．５から発した光５０は、直
接上方向には行かず発光素子挿入穴１ａ、ｌａの側面１
ａ−１，１ａ−１から導光体１内部に導入される。As shown in FIG. 1, the light emitting element insertion hole 1a of the light guide 1,
The light emitting elements 5, 5 inserted in la are made to emit light. Here, since the upper surfaces of the light-emitting element insertion holes 1a and la are covered with the paint 1f, the light 50 emitted from the light-emitting elements 5.5 does not go directly upward, but the side surface 1 of the light-emitting element insertion holes 1a and la.
The light is introduced into the light guide 1 from a-1 and 1a-1.
導光体１内部に導入された横方向の光５０は導光体１の
裏面に形成された傾斜面１ｂによって反射され上方向へ
向かう光５０となる。また導光体１の側面に向かった光
５０も反射されて上方向の光５０となる。このとき導光
体１の全裏面と金側面には塗料１ｆが塗布され、また導
光体１の裏面には反射部材７が貼り付けられているので
、傾斜面１ｂによる光５０の反射はより良好となる。The lateral light 50 introduced into the light guide 1 is reflected by the inclined surface 1b formed on the back surface of the light guide 1, and becomes light 50 directed upward. Further, the light 50 directed toward the side surface of the light guide 1 is also reflected and becomes light 50 directed upward. At this time, since the paint 1f is applied to the entire back surface and the gold side surface of the light guide 1, and the reflective member 7 is attached to the back surface of the light guide 1, the reflection of the light 50 by the inclined surface 1b is further reduced. Becomes good.
このように発光素子５，５が発する光５０を直接カラー
フィルター３に向かわせず、導光体１の傾斜面１ｂによ
り各種方向に反射させた光５０をカラーフィルター３に
向かわせることとしたため、カラーフィルタ−３全体を
均一に光らせることができる。In this way, the light 50 emitted by the light emitting elements 5, 5 is not directed directly to the color filter 3, but the light 50 reflected in various directions by the inclined surface 1b of the light guide 1 is directed to the color filter 3. The entire color filter 3 can be illuminated uniformly.
第５図は本発明に係る液晶表示素子の照明装置の他の実
施例を示す図であり、第６図はこの実施例に用いられる
ケース２１を示す図で、同図（ａ）は平面図、同図（ｂ
）は同図（ａ）のＢ−Ｂ線上断面矢視図である。FIG. 5 is a diagram showing another embodiment of the lighting device for a liquid crystal display element according to the present invention, and FIG. 6 is a diagram showing a case 21 used in this embodiment, and FIG. 6(a) is a plan view. , the same figure (b
) is a cross-sectional view taken along line B-B in FIG.
この実施例における導光体１は第２図に示す導光体１と
同一であるが、その裏面と側面を覆う構造が相違してい
る。即ち、この実施例においては、導光体１に塗装を施
す代わりに、該導光体１の裏面と側面とを光を反射する
不透光性のケース２１で覆うこととしている。このケー
ス２１は第６図に示すように導光体１に密着して導光体
１の全裏面と全側面とを覆う形状に構成され、その長手
方向の両端近傍には発光素子５，５を挿入するとともに
前記導光体１の突起１ｅを挿入する穴２１ａ、２１ａが
形成されている。The light guide 1 in this embodiment is the same as the light guide 1 shown in FIG. 2, but the structure that covers the back and side surfaces is different. That is, in this embodiment, instead of painting the light guide 1, the back and side surfaces of the light guide 1 are covered with an opaque case 21 that reflects light. As shown in FIG. 6, this case 21 is configured in a shape that closely fits the light guide 1 and covers the entire back surface and all side surfaces of the light guide 1, and the case 21 has light emitting elements 5, 5 near both ends in the longitudinal direction. Holes 21a, 21a are formed into which the protrusion 1e of the light guide 1 is inserted.
次にこの実施例における液晶表示素子の照明装置の組立
て方法を説明する。Next, a method of assembling a lighting device for a liquid crystal display element in this embodiment will be explained.
まず導光体１の発光素子挿入穴１ａ、ｌａの上面に反射
紙２３を貼る。この反射紙２３は光を反射する不透光性
の材料で形成きれている。First, reflective paper 23 is pasted on the upper surface of the light emitting element insertion holes 1a and la of the light guide 1. The reflective paper 23 is made of an opaque material that reflects light.
次に導光体１の裏面側からケース２１を嵌合し、さらに
導光体１の上面から第３図に示すと同様なカラーフィル
ター３を貼り付ける。次に前記導光体１の発光素子挿入
穴１ａ、ｌａ内に第１図に示す発光素子５，５を挿入・
配置してこの液晶表示素子の照明装置が完成する。本実
施例のようにケース２１と反射紙２３により導光体１の
裏面側を覆えば、導光体１の裏面側に塗料を塗る実施例
に比べその組立て作業が容易となる。Next, a case 21 is fitted from the back side of the light guide 1, and a color filter 3 similar to that shown in FIG. 3 is attached from the top of the light guide 1. Next, insert the light emitting elements 5, 5 shown in FIG. 1 into the light emitting element insertion holes 1a, la of the light guide 1.
By arranging the liquid crystal display elements, a lighting device for this liquid crystal display element is completed. If the back side of the light guide 1 is covered with the case 21 and the reflective paper 23 as in this embodiment, the assembly work will be easier than in the embodiment in which the back side of the light guide 1 is coated with paint.
第７図は本発明に係る液晶表示素子の照明装置のさらに
他の実施例を示す側断面図である。FIG. 7 is a side sectional view showing still another embodiment of the lighting device for a liquid crystal display element according to the present invention.
この実施例における液晶表示素子の照明装置は、透明で
平板形状の導光体１゛と該導光体１′の裏面中央に形成
された発光素子挿入穴１’ａに挿入された発光素子５゛
とを具備し、該発光素子５′から発射された光５０’を
前記導光体１゛の裏面に形成した傾斜面１’ｂで反射さ
せ上側（液晶表示素子（図示せず）側）に導くと共に前
記導光体１′の表面側を平板形のカラーフィルター３′
で覆うことにより前記光５０゛を路光状に光らせるよう
に構成されている。なおここでｌ’ｆは塗料、７゛は反
射部材である。The lighting device for a liquid crystal display element in this embodiment includes a transparent flat plate-shaped light guide 1' and a light emitting element 5 inserted into a light emitting element insertion hole 1'a formed at the center of the back surface of the light guide 1'. The light 50' emitted from the light emitting element 5' is reflected by the inclined surface 1'b formed on the back surface of the light guide 1' to the upper side (liquid crystal display element (not shown) side). and a flat color filter 3' on the front side of the light guide 1'.
The structure is such that the light 50° is illuminated in the form of a path light. Here, l'f is paint and 7' is a reflective member.
液晶表示素子の照明装置をこのように構成すれば、１個
の発光素子５゛のみでカラーフィルタ−３′全体（ひい
ては液晶表示素子全体）を均等に照明することができる
。By configuring the illumination device for a liquid crystal display element in this manner, the entire color filter 3' (and by extension, the entire liquid crystal display element) can be uniformly illuminated with only one light emitting element 5'.
以上本発明に係る液晶表示素子の照明装置の実施例を詳
細に説明したが、本発明はこれに限定されるものではな
く、要は透明な材料で形成された導光体１と該導光体１
の所定部分に形成された発光素子挿入穴１ａに挿入され
た発光素子５とを具備し、該発光素子５から発射された
光を前記導光体１の少なくとも裏面で反射させ液晶表示
素子側に導く構造であればどのように構成してもよいの
である。従って例えば、
■導光体１の傾斜面１ｂに梨地処理を施してもよく、こ
のように構成すれば前記発光素子５が発する光を傾斜面
１がより効果的に乱反射しカラーフィルター３を茫光状
に照らしだせ、また、■前記導光体１の表面に梨地処理
を施してもよく、このように構成すれば導光体１から液
晶表示素子側に導き出した光がより効果的に乱反射し、
カラーフィルター３を茫光状に照らしだせ、また、
■上記実施例においては導光体１に設けた発光素子挿入
穴１ａ、ｌａの上面に塗料１ｆ（第１図）を塗ったり反
射紙２３（第５図）を貼ったりして直接カラーフィルタ
ー３側に光５０が向かわないように構成したが、これら
の代わりにこの発光素子挿入穴１ａ、ｌａの上面に多数
の凹凸を設ける等して、この面に向かう光５０を乱反射
させるように構成してもよく、また、
■カラーフィルター３は有彩色のフィルターでなくても
よく、乳白色その他のものでもよい、等種々の変形が可
能である。Although the embodiments of the lighting device for a liquid crystal display element according to the present invention have been described in detail above, the present invention is not limited thereto. body 1
A light emitting element 5 is inserted into a light emitting element insertion hole 1a formed in a predetermined portion of the light emitting element 5, and the light emitted from the light emitting element 5 is reflected on at least the back surface of the light guide 1 toward the liquid crystal display element side. Any structure can be used as long as it can lead to this. Therefore, for example, (1) the sloped surface 1b of the light guide 1 may be subjected to a matte finish; with this configuration, the sloped surface 1 more effectively reflects the light emitted by the light emitting element 5, and the color filter 3 is shaded; (2) The surface of the light guide 1 may be treated with a matte finish. With this configuration, the light guided from the light guide 1 toward the liquid crystal display element can be more effectively diffused. death,
The color filter 3 can be illuminated in a dazzling manner, and (1) In the above embodiment, the upper surface of the light emitting element insertion holes 1a and la provided in the light guide 1 may be coated with paint 1f (Fig. 5) so that the light 50 does not go directly to the color filter 3 side, but instead of this, a large number of irregularities are provided on the upper surface of the light emitting element insertion holes 1a, la, etc. It may be constructed so that the light 50 directed toward this surface is diffusely reflected, and (1) the color filter 3 does not need to be a chromatic filter, but may be milky white or other. Various modifications are possible.
以上詳細に説明したように、本発明に係る液晶表示素子
の照明装置によれば、発光素子から発射された光を導光
体の少なくとも裏面で反射させ液晶表示素子側に導くよ
うに構成したので、発光素子が発する光が直接液晶表示
素子を照らさず、反射した光が間接的に液晶表示素子を
照らすので、照明装置の縦方向の寸法をかなり小さくで
きるとともに液晶表示素子の全面を均一に光らせること
ができるという優れた効果を有する。As described above in detail, the lighting device for a liquid crystal display element according to the present invention is configured so that the light emitted from the light emitting element is reflected on at least the back surface of the light guide and guided toward the liquid crystal display element. Since the light emitted by the light emitting element does not directly illuminate the liquid crystal display element, but the reflected light illuminates the liquid crystal display element indirectly, the vertical dimension of the lighting device can be considerably reduced, and the entire surface of the liquid crystal display element can be illuminated uniformly. It has the excellent effect of being able to
また、導光体内で反射された光が該導光体内にこもらず
、液晶表示素子に向かって行くため液晶表示素子の全面
を充分に光らせることができるという優れた効果をも有
する。Furthermore, since the light reflected within the light guide is not trapped in the light guide and goes toward the liquid crystal display element, it has the excellent effect that the entire surface of the liquid crystal display element can be sufficiently illuminated.
第１図は本発明に係る液晶表示素子の照明装置の一実施
例の断面図、第２図は本実施例の導光体１を示す図で、
同図（ａ）は平面図、同図（ｂ）は同図（ａ）のＡ−Ａ
線上断面矢視図、第３図は導光体１に各種部材を取り付
ける方法を説明するための図、第４図は液晶表示素子の
照明装置の配置位置を示す図、第５図は本発明に係る液
晶表示素子の照明装置の他の実施例を示す図、第６図は
ケース２１を示す図で、同図（ａ）は平面図、同図（ｂ
）は同図（ａ）のＢ−Ｂ線上断面矢視図、第７図は本発
明に係る液晶表示素子の照明装置のさらに他の実施例を
示す側断面図、第８図は従来の液晶表示素子の照明装置
を示す図、第９図は他の従来の液晶表示素子の照明装置
を示す図である。
図中、１・・・導光体、１ａ・・・発光素子挿入穴、１
ｂ・・・傾斜面、１ｆ・・・塗料、３・・・カラーフィ
ルター、５・・・発光素子、７・・・反射部材、１１・
・・液晶表示素子、２１・・・ケース、である。FIG. 1 is a sectional view of an embodiment of a lighting device for a liquid crystal display element according to the present invention, and FIG. 2 is a diagram showing a light guide 1 of this embodiment.
Figure (a) is a plan view, Figure (b) is A-A in Figure (a).
3 is a diagram for explaining the method of attaching various members to the light guide 1, FIG. 4 is a diagram showing the arrangement position of the illumination device of the liquid crystal display element, and FIG. 5 is a diagram showing the arrangement of the lighting device of the liquid crystal display element. FIG. 6 is a diagram showing the case 21, and FIG. 6A is a plan view and FIG.
) is a cross-sectional view taken along the line B--B in FIG. FIG. 9 is a diagram showing an illumination device for a display element, and FIG. 9 is a diagram showing another conventional illumination device for a liquid crystal display element. In the figure, 1... Light guide, 1a... Light emitting element insertion hole, 1
b... Slanted surface, 1f... Paint, 3... Color filter, 5... Light emitting element, 7... Reflective member, 11...
...Liquid crystal display element, 21...case.
Claims (8)
に光を照射する液晶表示素子の照明装置において、透明
な材料で形成された導光体と該導光体の所定部分に形成
された発光素子挿入穴に挿入された発光素子とを具備し
、該発光素子から発射された光を前記導光体の少なくと
も裏面で反射させ液晶表示素子側に導くことを特徴とす
る液晶表示素子の照明装置。(1) In a lighting device for a liquid crystal display element that is placed on the back side of a liquid crystal display element and irradiates light to the liquid crystal display element, a light guide made of a transparent material and a predetermined portion of the light guide are formed. a light emitting element inserted into a light emitting element insertion hole, the light emitted from the light emitting element is reflected at least on the back surface of the light guide and guided to the liquid crystal display element side. lighting equipment.
発する光を反射する少なくとも１面以上の傾斜面を有し
ていることを特徴とする特許請求の範囲第（１）項記載
の液晶表示素子の照明装置。(2) The light guide is plate-shaped and has at least one inclined surface on its back surface that reflects light emitted from the light emitting element. lighting equipment for liquid crystal display elements.
光素子挿入穴は前記導光体裏面の同側近傍に設けられ、
前記傾斜面は導光体の裏面中央から左右対称の山型状に
形成されたことを特徴とする特許請求の範囲第（２）項
記載の液晶表示素子の照明装置。(3) the plate-shaped light guide is formed in a rectangular shape, and the light emitting element insertion hole is provided near the same side of the back surface of the light guide;
2. The illumination device for a liquid crystal display element according to claim 2, wherein the inclined surface is formed in a symmetrical mountain shape from the center of the back surface of the light guide.
ルターで覆ったことを特徴とする特許請求の範囲第（１
）項、第（２）項又は第（３）項一記載の液晶表示素子
の照明装置。(4) The surface side of the light guide is covered with a filter that transmits light in a dazzling manner.
), (2), or (3).
を不透光性部材で覆ったことを特徴とする特許請求の範
囲第（１）項、第（２）項、第（３）項又は第（４）項
記載の液晶表示素子の照明装置。(5) The back surface of the light guide excluding the side surface inside the light emitting element insertion hole is covered with a non-transparent member. ) or (4), the lighting device for a liquid crystal display element.
を特徴とする特許請求の範囲第（５）項記載の液晶表示
素子の照明装置。(6) The lighting device for a liquid crystal display element according to claim (5), wherein the non-transparent member is a non-transparent paint.
覆う不透光性のケースであることを特徴とする特許請求
の範囲第（５）項記載の液晶表示素子の照明装置。(7) Illumination for a liquid crystal display element according to claim (5), wherein the non-transparent member is a non-transparent case that covers the back and side surfaces of the light guide. Device.
反射部材を取り付けたことを特徴とする特許請求の範囲
第（２）項記載の液晶表示素子の照明装置。(8) The lighting device for a liquid crystal display element according to claim (2), characterized in that a reflecting member for reflecting light emitted from the light emitting element is attached to the inclined surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62129030A JPH0621884B2 (en) | 1987-05-26 | 1987-05-26 | Liquid crystal display lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62129030A JPH0621884B2 (en) | 1987-05-26 | 1987-05-26 | Liquid crystal display lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63293506A true JPS63293506A (en) | 1988-11-30 |
| JPH0621884B2 JPH0621884B2 (en) | 1994-03-23 |
Family
ID=14999386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62129030A Expired - Lifetime JPH0621884B2 (en) | 1987-05-26 | 1987-05-26 | Liquid crystal display lighting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0621884B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02208631A (en) * | 1989-02-08 | 1990-08-20 | Copal Co Ltd | Surface light emission body device for lighting liquid crystal display element |
| JPH0337402U (en) * | 1989-08-21 | 1991-04-11 | ||
| US5404277A (en) * | 1993-02-16 | 1995-04-04 | Lindblad; Edward W. | Apparatus for backlighting LCD |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62235905A (en) * | 1986-04-07 | 1987-10-16 | Dainippon Printing Co Ltd | Plane optical source |
| JPS638703U (en) * | 1986-07-04 | 1988-01-21 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5822566A (en) * | 1981-07-29 | 1983-02-09 | Matsushita Electric Works Ltd | Fixing of magnet for stator of motor |
-
1987
- 1987-05-26 JP JP62129030A patent/JPH0621884B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62235905A (en) * | 1986-04-07 | 1987-10-16 | Dainippon Printing Co Ltd | Plane optical source |
| JPS638703U (en) * | 1986-07-04 | 1988-01-21 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02208631A (en) * | 1989-02-08 | 1990-08-20 | Copal Co Ltd | Surface light emission body device for lighting liquid crystal display element |
| JPH0337402U (en) * | 1989-08-21 | 1991-04-11 | ||
| US5404277A (en) * | 1993-02-16 | 1995-04-04 | Lindblad; Edward W. | Apparatus for backlighting LCD |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0621884B2 (en) | 1994-03-23 |
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