JPH04282614A - Liquid crystal display device and electronic appliance formed by using liquid crystal display device - Google Patents
Liquid crystal display device and electronic appliance formed by using liquid crystal display deviceInfo
- Publication number
- JPH04282614A JPH04282614A JP3046661A JP4666191A JPH04282614A JP H04282614 A JPH04282614 A JP H04282614A JP 3046661 A JP3046661 A JP 3046661A JP 4666191 A JP4666191 A JP 4666191A JP H04282614 A JPH04282614 A JP H04282614A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display device
- crystal display
- crystal cell
- light source
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 89
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 39
- 230000001678 irradiating effect Effects 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は液晶表示装置および液晶
表示装置を用いた電子機器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 and electronic equipment using the liquid crystal display device.
【０００２】0002
【従来の技術】従来の液晶表示装置は、液晶セルの両面
に偏光板を貼り付け、さらに、目視側と反対側の偏光板
には反射板を貼り付けた構造の反射型液晶表示装置と、
液晶セルの両面に偏光板を貼り付け、さらに、目視側と
反対側の偏光板の外側に平面状の発光体を有する構造を
して透過型液晶表示装置の２種類があり、反射型液晶表
示装置の場合、液晶セルを照らすための手段を設けたも
のは無く、また、この液晶表示装置を電子機器に組み込
んだ場合も同様に、電子機器に液晶表示装置の液晶セル
の部分を照らすための手段を設けたものはなかった。2. Description of the Related Art Conventional liquid crystal display devices include a reflective liquid crystal display device having a structure in which polarizing plates are attached to both sides of a liquid crystal cell, and a reflective plate is attached to the polarizing plate on the side opposite to the viewing side.
There are two types of LCD devices: transmissive LCD devices, which have a structure in which polarizing plates are pasted on both sides of the liquid crystal cell, and a planar light emitter is placed on the outside of the polarizing plates on the viewing side and the opposite side, and reflective LCD devices. In the case of devices, there are no devices equipped with a means for illuminating the liquid crystal cell, and similarly, when this liquid crystal display device is incorporated into electronic equipment, there is no means for illuminating the liquid crystal cell part of the liquid crystal display device. There was no means available.
【０００３】0003
【発明が解決しようとする課題】しかし、前述の透過型
の液晶表示装置を電子機器、特に携帯用パソコンなどに
組み込んで使用した場合、電子機器に外部より電源を供
給できるときは問題無いが、外部電源を使用せず、電子
機器内蔵のバッテリーを使用するときは、内蔵バッテリ
ーの容量が小さいため、電子機器の使用可能時間が短く
なってしまうという欠点を有していた。[Problems to be Solved by the Invention] However, when the above-mentioned transmissive liquid crystal display device is incorporated into an electronic device, particularly a portable personal computer, etc., there is no problem when power can be supplied to the electronic device from the outside. When using a battery built into an electronic device without using an external power source, the built-in battery has a small capacity, resulting in a disadvantage that the usable time of the electronic device is shortened.
【０００４】また、反射型の液晶表示装置を電子機器に
組み込んで使用した場合、暗い環境下で用いたときには
、液晶表示装置に入射する光の絶対量が低下するため、
表示が暗く、内容が認識しにくいという欠点を有してい
た。[0004] Furthermore, when a reflective liquid crystal display device is incorporated into an electronic device and used in a dark environment, the absolute amount of light incident on the liquid crystal display device decreases.
The disadvantage was that the display was dark and the contents were difficult to recognize.
【０００５】そこで、本発明は上記欠点を解決するため
に液晶表示装置に補助光源を備えたものであり、その目
的とするところは暗い環境下でも見やすい反射型液晶表
示装置を提供するところにある。In order to solve the above-mentioned drawbacks, the present invention provides a liquid crystal display device with an auxiliary light source, and its purpose is to provide a reflective liquid crystal display device that is easy to see even in a dark environment. .
【０００６】[0006]
【課題を解決するための手段】本発明の液晶表示装置は
、電極を有する一対の基板間に液晶層を挟持することに
より液晶セルを形成し、かつ前記液晶層を挟むように一
対の偏光層を有し、かつ前記一対の偏光層の目視側とは
反対側の偏光層の外側に反射層を設けた液晶セルを有す
る液晶表示装置において、前記液晶セルの周辺と前記液
晶表示装置の周辺の間の部分に、液晶セルを照射するた
めの光源と前記光源からの光を反射させて液晶セルに照
射するための反射板を設けたことを特徴とする。[Means for Solving the Problems] A liquid crystal display device of the present invention forms a liquid crystal cell by sandwiching a liquid crystal layer between a pair of substrates having electrodes, and a pair of polarizing layers sandwiching the liquid crystal layer. and a liquid crystal cell having a reflective layer on the outside of the polarizing layer on the side opposite to the viewing side of the pair of polarizing layers, the periphery of the liquid crystal cell and the periphery of the liquid crystal display device. A light source for irradiating the liquid crystal cell and a reflecting plate for reflecting the light from the light source and irradiating the liquid crystal cell are provided in the intermediate portion.
【０００７】[0007]
【実施例】以下本発明の実施例を図を用いて説明する。[Embodiments] Examples of the present invention will be described below with reference to the drawings.
【０００８】〔実施例１〕図１は本発明の一実施例であ
る液晶表示装置の短辺方向の断面図である。１は液晶セ
ルであり、画素数は横方向６４０画素×縦方向４００画
素で、サイズは横２２ｃｍ×縦１４ｃｍである。また、
液晶セルは抑え枠２の中に納められている。３及び４は
冷陰極管であり直径３．５ｍｍ、長さ２３ｃｍのものを
用い、液晶表示装置の長辺の両端に配置されている。５
及び６は反射板であり冷陰極管からの光を反射させ、液
晶セルを照射する。[Embodiment 1] FIG. 1 is a sectional view in the short side direction of a liquid crystal display device according to an embodiment of the present invention. 1 is a liquid crystal cell, the number of pixels is 640 pixels in the horizontal direction x 400 pixels in the vertical direction, and the size is 22 cm in width x 14 cm in height. Also,
The liquid crystal cell is housed in a holding frame 2. Reference numerals 3 and 4 are cold cathode tubes having a diameter of 3.5 mm and a length of 23 cm, and are arranged at both ends of the long side of the liquid crystal display device. 5
and 6 is a reflecting plate that reflects the light from the cold cathode tube and illuminates the liquid crystal cell.
【０００９】本発明の液晶表示装置を明るい環境下で使
用する場合は、周囲より液晶セルに入射する光が充分量
有るため、冷陰極管は非点灯とする。一方、暗い環境下
で使用する場合には、冷陰極管を点灯状態として、冷陰
極管からの直接光及び反射板で反射した光により液晶セ
ルを照射する。これにより、暗い環境下でも充分な明る
さを得ることが可能となり、見やすい表示を得ることが
可能となる。When the liquid crystal display device of the present invention is used in a bright environment, the cold cathode tube is turned off because there is a sufficient amount of light incident on the liquid crystal cell from the surroundings. On the other hand, when used in a dark environment, the cold cathode tube is turned on and the liquid crystal cell is irradiated with direct light from the cold cathode tube and light reflected by the reflector. This makes it possible to obtain sufficient brightness even in a dark environment, making it possible to obtain an easy-to-read display.
【００１０】この液晶表示装置を電子機器、特に携帯用
パソコンに用いた場合、内臓のバッテリーを用いて使用
するときは、冷陰極管を非点灯状態にして使用すること
により、液晶表示装置の消費電力を抑えることができ、
特に明るい環境下で使用する場合に適している。一方、
暗い環境下で使用するときなどは冷陰極管を点灯させる
ことにより明るく見やすい表示が可能となる。従って、
電子機器に組み込んだ場合は、その時の使用状況により
冷陰極管の点灯、非点灯を切り替えることによりバッテ
リーの使用可能時間を延ばすことが可能となる。[0010] When this liquid crystal display device is used in electronic equipment, especially a portable personal computer, when using the built-in battery, the consumption of the liquid crystal display device can be reduced by using the cold cathode tube in a non-lit state. Can save power,
Especially suitable for use in bright environments. on the other hand,
When using in a dark environment, the cold cathode tubes can be turned on to provide a bright and easy-to-see display. Therefore,
When incorporated into electronic equipment, it is possible to extend the usable time of the battery by switching the cold cathode tube between lighting and non-lighting depending on the usage situation at the time.
【００１１】〔実施例２〕図２は本発明の一実施例であ
る液晶表示装置の短辺方向の断面図である。１１は液晶
セルであり、実施例１と同じものを用い、押え枠１２の
中に納められている。１３は冷陰極管であり直径４ｍｍ
、長さ２３ｃｍのものを用い、液晶表示装置の長辺の片
側に配置されている。１４は反射板であり冷陰極管から
の光を反射させ、液晶セルを照射する。１５は液晶表示
装置の冷陰極管１３を有する側と反対側の辺に設置され
た反射板であり、冷陰極管１３からの直接光及び反射板
１４で反射された光を反射させ液晶セルを照射する。
本実施例の場合、冷陰極管が１本しかないため実施例１
と比較すると、若干明るさは低下するが、消費電力が実
施例１の約半分であり、また、液晶セルを照射するため
の部分の占める体積も実施例１より小さくなっている。[Embodiment 2] FIG. 2 is a cross-sectional view in the short side direction of a liquid crystal display device according to an embodiment of the present invention. Reference numeral 11 denotes a liquid crystal cell, which is the same as in Example 1 and is housed in a presser frame 12. 13 is a cold cathode tube with a diameter of 4 mm
, with a length of 23 cm, is placed on one of the long sides of the liquid crystal display device. A reflecting plate 14 reflects the light from the cold cathode tube and illuminates the liquid crystal cell. Reference numeral 15 denotes a reflector plate installed on the opposite side of the liquid crystal display device to the side where the cold cathode tube 13 is provided, and reflects the direct light from the cold cathode tube 13 and the light reflected by the reflector plate 14 to illuminate the liquid crystal cell. irradiate. In the case of this example, since there is only one cold cathode tube, Example 1
Although the brightness is slightly lower, the power consumption is about half that of Example 1, and the volume occupied by the portion for irradiating the liquid crystal cell is also smaller than that of Example 1.
【００１２】〔実施例３〕上記実施例１では冷陰極管及
び反射板からの光を直接液晶セルに照射しているが、こ
の場合液晶セル中心部での明るさが低下しがちである、
そのため、図３に示すように冷陰極管及び反射板と液晶
セルの間にレンズ２７，２８を挿入し、液晶セル中心部
に照射される光の量を増加させることにより場所によら
ず均一な明るさを得ることも可能である。これは、実施
例２の場合も同様であり、実施例１と同じ位置にレンズ
を設けることにより液晶セル全面において均一な明るさ
を得ることが可能であることはいうまでもなく明らかで
ある。[Embodiment 3] In the above embodiment 1, the liquid crystal cell is directly irradiated with light from the cold cathode tube and the reflector, but in this case, the brightness at the center of the liquid crystal cell tends to decrease.
Therefore, as shown in Figure 3, lenses 27 and 28 are inserted between the cold cathode tube, the reflector, and the liquid crystal cell to increase the amount of light irradiated to the center of the liquid crystal cell, thereby making it uniform regardless of the location. It is also possible to obtain brightness. This is the same in the case of the second embodiment, and it goes without saying that by providing the lens at the same position as in the first embodiment, it is possible to obtain uniform brightness over the entire surface of the liquid crystal cell.
【００１３】前述の実施例１及び２では、冷陰極管を液
晶表示装置の長辺側に設置したが、短辺側に設置した場
合も同様な効果が得られ、長辺側と短辺側の両側に設置
するとより明るい表示を得ることが可能となる。In the first and second embodiments described above, the cold cathode tube was installed on the long side of the liquid crystal display device, but the same effect can be obtained even if the cold cathode tube is installed on the short side. If installed on both sides of the screen, a brighter display can be obtained.
【００１４】また、光源としては、冷陰極管ばかりでな
く、熱陰極管、ＬＥＤ、電球など様々な光源が使用可能
である。Furthermore, various light sources such as not only cold cathode tubes but also hot cathode tubes, LEDs, and light bulbs can be used as the light source.
【００１５】〔実施例４〕上記実施例１〜３では、冷陰
極管及び反射板を液晶表示装置に設置しているが、電子
機器側に設置しても同様な効果が得られることは言うま
でもなく明らかである。[Example 4] In Examples 1 to 3 above, the cold cathode tube and the reflector are installed in the liquid crystal display device, but it goes without saying that the same effect can be obtained even if they are installed in the electronic device. It is very clear.
【００１６】[0016]
【発明の効果】以上述べたように本発明の液晶表示装置
は、液晶セルの両面に偏光板を貼り付け、さらに、目視
側と反対側の偏光板には反射板を貼り付けた液晶表示装
において、液晶表示装置の液晶セルの外側の部分に、液
晶セルを照射するための光源とその光源からの光を反射
させて液晶セルに照射するための反射板を設けることに
より、暗い環境下においても反射型液晶表示装置の表示
が見やすくなるという効果を有する。As described above, the liquid crystal display device of the present invention is a liquid crystal display device in which polarizing plates are attached to both sides of a liquid crystal cell, and a reflective plate is attached to the polarizing plate on the side opposite to the viewing side. In a liquid crystal display device, a light source for illuminating the liquid crystal cell and a reflector plate for reflecting the light from the light source and illuminating the liquid crystal cell are provided on the outside of the liquid crystal cell of the liquid crystal display device. This also has the effect of making the display of the reflective liquid crystal display device easier to see.
【図１】本発明の液晶表示装置を示す断面図。FIG. 1 is a sectional view showing a liquid crystal display device of the present invention.
【図２】本発明の液晶表示装置を示す断面図。FIG. 2 is a sectional view showing a liquid crystal display device of the present invention.
【図３】本発明の液晶表示装置を示す断面図。FIG. 3 is a sectional view showing a liquid crystal display device of the present invention.
１．液晶セル ２．押え枠 ３．冷陰極管 ４．冷陰極管 ５．反射板 ６．反射板 １１．液晶セル １２．押え枠 １３．冷陰極管 １４．反射板 １５．反射板 ２１．液晶セル ２２．押え枠 ２３．冷陰極管 ２４．冷陰極管 ２５．反射板 ２６．反射板 ２７．レンズ ２８．レンズ 1. lcd cell 2. Presser frame 3. cold cathode tube 4. cold cathode tube 5. a reflector 6. a reflector 11. lcd cell 12. Presser frame 13. cold cathode tube 14. a reflector 15. a reflector 21. lcd cell 22. Presser frame 23. cold cathode tube 24. cold cathode tube 25. a reflector 26. a reflector 27. lens 28. lens
Claims (3)
挟持することにより液晶セルを形成し、かつ前記液晶層
を挟むように一対の偏光層を有し、かつ前記一対の偏光
層の目視側とは反対側の偏光層の外側に反射層を設けた
液晶セルを有する液晶表示装置において、前記液晶セル
の周辺と前記液晶表示装置の周辺の間の部分に、液晶セ
ルを照射するための光源と前記光源からの光を反射させ
て液晶セルに照射するための反射板を設けたことを特徴
とする液晶表示装置。1. A liquid crystal cell is formed by sandwiching a liquid crystal layer between a pair of substrates having electrodes, a pair of polarizing layers are sandwiched between the liquid crystal layers, and the pair of polarizing layers are visually observed. In a liquid crystal display device having a liquid crystal cell in which a reflective layer is provided on the outside of a polarizing layer on the opposite side, a method for irradiating the liquid crystal cell to a portion between the periphery of the liquid crystal cell and the periphery of the liquid crystal display device. A liquid crystal display device comprising a light source and a reflecting plate for reflecting light from the light source and irradiating a liquid crystal cell.
を特徴とする液晶表示装置を用いた電子機器。2. An electronic device using a liquid crystal display device, characterized in that it has the liquid crystal display device according to claim 1.
挟持することにより液晶セルを形成し、かつ前記液晶層
を挟むように一対の偏光層を有し、かつ前記一対の偏光
層の目視側とは反対側の偏光層の外側に反射層を設けた
液晶セルを具備する液晶表示装置を有する電子機器にお
いて、液晶セルを照射するための光源と前記光源からの
光を反射させて液晶セルに照射するための反射板を設け
たことを特徴とする液晶表示装置を用いた電子機器。3. A liquid crystal cell is formed by sandwiching a liquid crystal layer between a pair of substrates having electrodes, and a pair of polarizing layers are sandwiched between the liquid crystal layers, and the pair of polarizing layers are visually observed. In an electronic device having a liquid crystal display device including a liquid crystal cell provided with a reflective layer on the outside of a polarizing layer on the opposite side, a light source for irradiating the liquid crystal cell and a light source for reflecting the light from the light source are used to display the liquid crystal cell. An electronic device using a liquid crystal display device characterized by being provided with a reflecting plate for irradiating light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3046661A JPH04282614A (en) | 1991-03-12 | 1991-03-12 | Liquid crystal display device and electronic appliance formed by using liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3046661A JPH04282614A (en) | 1991-03-12 | 1991-03-12 | Liquid crystal display device and electronic appliance formed by using liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04282614A true JPH04282614A (en) | 1992-10-07 |
Family
ID=12753522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3046661A Pending JPH04282614A (en) | 1991-03-12 | 1991-03-12 | Liquid crystal display device and electronic appliance formed by using liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04282614A (en) |
-
1991
- 1991-03-12 JP JP3046661A patent/JPH04282614A/en active Pending
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