JP2535709B2 - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- JP2535709B2 JP2535709B2 JP4185667A JP18566792A JP2535709B2 JP 2535709 B2 JP2535709 B2 JP 2535709B2 JP 4185667 A JP4185667 A JP 4185667A JP 18566792 A JP18566792 A JP 18566792A JP 2535709 B2 JP2535709 B2 JP 2535709B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- cooling
- cooling unit
- layer
- 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.)
- Expired - Lifetime
Links
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
- Projection Apparatus (AREA)
Description
【0001】[0001]
【発明の技術分野】この発明は、透過型液晶表示体の背
面にバックライトを設け、そのバックライトの光を液晶
層に背面から照射し、その光の透過によって画像表示を
行う液晶テレビ、もしくは、液晶プロジェクターなどの
液晶表示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal television in which a backlight is provided on the back of a transmissive liquid crystal display, the liquid crystal layer is irradiated with light from the backlight from the back, and an image is displayed by transmitting the light. , A liquid crystal display device such as a liquid crystal projector.
【0002】[0002]
【従来技術とその問題点】従来、液晶プロジェクター装
置のような透過型液晶表示体を用いた液晶表示装置にお
いては、バックライトによる光の透過で画像表示を行っ
ている。ところが、画像のコントラストを向上させるた
めに高輝度・高光量のバックライトを用いると、バック
ライト用光源の発熱や、その光源の光に含まれる赤外線
によって液晶層の液晶材が熱せられ、その温度上昇によ
り液晶材が劣化されやすくなってしまう。よって液晶表
示体に上記熱が付加されると、画像に輝度むらやコント
ラストむらが生じやすくなってしまい、品質の良い画像
が得られなくなるという問題点があった。2. Description of the Related Art Conventionally, in a liquid crystal display device using a transmissive liquid crystal display such as a liquid crystal projector device, an image is displayed by transmitting light by a backlight. However, when a backlight with high brightness and high light intensity is used to improve the contrast of the image, the liquid crystal material of the liquid crystal layer is heated by the heat generated by the light source for the backlight and the infrared rays contained in the light from the light source, and The liquid crystal material is likely to be deteriorated due to the rise. Therefore, when the above-mentioned heat is applied to the liquid crystal display body, unevenness in brightness and unevenness in contrast are likely to occur in the image, and there is a problem in that a high-quality image cannot be obtained.
【0003】[0003]
【発明の目的】この発明は上述した事情に鑑みてなされ
たもので、その目的とするところは、液晶プロジェクタ
ー装置のような透過型液晶表示体を用いた液晶表示装置
において、バックライト用光源の発熱やその光源の光に
含まれる赤外線などにより液晶材が熱せられ、その温度
上昇による液晶材の劣化で輝度むらやコントラストむら
などが生じて、画像品質の低下が生じるのを阻止できる
ようにした液晶表示装置を提供しようとするものであ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a liquid crystal display device using a transmissive liquid crystal display device such as a liquid crystal projector device, in which a light source for a backlight is used. The liquid crystal material is heated by heat generation and infrared rays contained in the light of the light source, and it is possible to prevent the deterioration of the image quality due to the unevenness of the brightness and the contrast due to the deterioration of the liquid crystal material due to the temperature rise. A liquid crystal display device is provided.
【0004】[0004]
【発明の要点】この発明の液晶表示装置は上述した目的
を達成するために、液晶を内蔵する液晶層を持った表示
体と、この表示体に密接して設けられ冷媒を前記表示体
の表示領域に対応させて充填した冷却層を持った冷却部
と、この冷却部の前記表示体とは反対側に配置した偏光
板とを備え、前記冷却部は前記表示体の表示領域に対応
した部分を透明部材で構成したことを特徴とするもので
ある。SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the liquid crystal display device of the present invention has a display body having a liquid crystal layer containing a liquid crystal, and a refrigerant provided in close contact with the display body to display the display body. a cooling unit having a cooling layer which is Hama charge in correspondence to the region, this includes a polarizing plate arranged on the side opposite to the display body of the cooling unit, the cooling unit is in the display area of the display body It is characterized in that the portion is made of a transparent member.
【0005】[0005]
【実施例】次に、この発明の実施例を図面に基づいて説
明する。図1および図2で示すのは、冷却部付き液晶表
示体の第1の実施例を示す斜視図および側面図で、この
場合、液晶表示体1の背面に冷媒循環式の冷却部2が液
晶表示体1自身と一体に取り付けてある。Embodiments of the present invention will now be described with reference to the drawings. 1 and 2 are a perspective view and a side view showing a first embodiment of a liquid crystal display body with a cooling unit. In this case, a cooling unit 2 of a refrigerant circulation type is provided on the back surface of the liquid crystal display unit 1. It is attached integrally with the display body 1 itself.
【0006】液晶表示体1は正面より見て、上偏光板
3、上ガラス基板4、下ガラス基板5と、冷却部2の背
面(外面)に配置されている下偏光板6とで構成され、
上記上ガラス基板4と下ガラス基板5は後述する液晶層
をはさみ込んでいる。The liquid crystal display 1 is composed of an upper polarizing plate 3, an upper glass substrate 4, a lower glass substrate 5 and a lower polarizing plate 6 arranged on the back surface (outer surface) of the cooling section 2 when viewed from the front. ,
The upper glass substrate 4 and the lower glass substrate 5 sandwich a liquid crystal layer described later.
【0007】一方、冷却部2は、液晶表示体1の下ガラ
ス基板5の外面に設けられる冷却ガラス基板7と、図3
で示すように、この冷却ガラス基板7と上記下ガラス基
板5との間に形成される冷却層8と、この冷却層8内に
冷媒が循環供給される循環口9、10とで構成されてい
る。この循環口9、10は冷却ガラス基板7に対して溶
着もしくは接着などによって固着されている。また、こ
の循環口9、10は冷却層8に対して対角線方向に設け
てあるが、その位置や数は図示以外であってもよい。On the other hand, the cooling unit 2 includes a cooling glass substrate 7 provided on the outer surface of the lower glass substrate 5 of the liquid crystal display 1, and FIG.
The cooling layer 8 is formed between the cooling glass substrate 7 and the lower glass substrate 5, and the cooling ports 8 are circulated and supplied with a cooling medium. There is. The circulation ports 9 and 10 are fixed to the cooling glass substrate 7 by welding or adhesion. Further, although the circulation ports 9 and 10 are provided in a diagonal direction with respect to the cooling layer 8, the positions and the numbers thereof may be other than those shown in the drawing.
【0008】上記において、液晶表示体1は、図3で明
らかなように上ガラス基板4と下ガラス基板5との間に
液晶材を内蔵した液晶層11が介在していて、この液晶
層11はシール用接着剤12で密閉されている。また、
冷却部2の冷却層8はシール用接着剤13で同じく密閉
されている。なお、液晶表示体1のセグメント端子は周
知のように上ガラス基板4の突出端4aから外部と接続
できるようになされている。In the above, the liquid crystal display 1 has a liquid crystal layer 11 containing a liquid crystal material interposed between the upper glass substrate 4 and the lower glass substrate 5 as is apparent from FIG. Are sealed with a sealing adhesive 12. Also,
The cooling layer 8 of the cooling unit 2 is also sealed with a sealing adhesive 13. As is well known, the segment terminals of the liquid crystal display 1 can be connected to the outside from the protruding end 4a of the upper glass substrate 4.
【0009】よって、上記構成の冷却部2には、図示で
は省略してあるが、使用に際して冷媒循環装置から供給
される冷却用の冷媒(液体または気体)を循環口9、1
0を介して冷却層8内に充填し、冷媒循環装置によって
この冷媒を冷却層8内に循環させる。Therefore, although not shown in the figure, the cooling unit 2 having the above-described structure is provided with a cooling medium (liquid or gas) supplied from a cooling medium circulation device at the time of use.
It is filled in the cooling layer 8 through 0, and this refrigerant is circulated in the cooling layer 8 by the refrigerant circulation device.
【0010】かくして、液晶表示体1は、これの後方に
配置されるバックライト用光源の発熱などによってその
液晶層11が温度上昇を受ける状態に至っても、冷却部
2内に循環させる冷媒によって液晶層11の液晶材が熱
せられて劣化するのを的確に阻止できる。Thus, in the liquid crystal display 1, even if the liquid crystal layer 11 reaches a state in which the temperature of the liquid crystal layer 11 is increased due to the heat generation of the light source for the backlight disposed behind the liquid crystal display 1, the liquid crystal is circulated in the cooling section 2 by the liquid crystal. It is possible to properly prevent the liquid crystal material of the layer 11 from being heated and deteriorated.
【0011】図4は、第2の実施例を示す。この実施例
は、冷却部2を備える液晶表示体1において、冷却部2
の冷却層8内に金属メッシュで構成されている放熱部材
14を内蔵させた場合である。この放熱部材14は、例
えば非常に細い線材で形成されていて、下ガラス基板5
と冷却ガラス基板7の間に介在させてある。そして、そ
の縁部が、例えば図5で示すようにシール用接着剤13
から外部に露出させてある。FIG. 4 shows a second embodiment. In this embodiment, in the liquid crystal display 1 including the cooling unit 2, the cooling unit 2
This is a case where the heat dissipation member 14 made of a metal mesh is built in the cooling layer 8. The heat dissipating member 14 is formed of, for example, a very thin wire rod, and the lower glass substrate 5
And the cooling glass substrate 7 are interposed. Then, as shown in FIG. 5, the edge portion has a sealing adhesive 13
It is exposed to the outside from.
【0012】上記において、放熱部材14のメッシュは
液晶表示体1の画質を損わない程度のものを用い、シー
ル用接着剤13から露出させてある部分は適宜な外部放
熱部材(図示せず)に組み付けられる。なお、この実施
例の場合の冷却層8は、上記放熱部材14が介入される
分シール用接着剤13の厚み寸法を適宜調整して構成さ
れる。In the above description, the mesh of the heat radiating member 14 is such that the image quality of the liquid crystal display 1 is not deteriorated, and the portion exposed from the sealing adhesive 13 is an appropriate external heat radiating member (not shown). Be assembled into. The cooling layer 8 in this embodiment is configured by appropriately adjusting the thickness dimension of the sealing adhesive 13 in which the heat dissipation member 14 is interposed.
【0013】なお、液晶表示体1に対する冷却部2の取
り付けは、前記第1の実施例および第2の実施例では冷
却部2を液晶表示体1の背面に一体に取り付けて示して
あるが、この冷却部2は液晶表示体1の正面に取り付け
て液晶表示体1と一体に設けてもよい。よって、この場
合の冷却層8は上ガラス基板4と冷却ガラス基板7とで
形成されることになり、かつ、上偏光板3は前記位置に
所在させるか、または、正面に配置される冷却ガラス基
板7の外面(前面)に設けるものとする。Although the cooling unit 2 is attached to the liquid crystal display body 1 in the first and second embodiments, the cooling unit 2 is integrally attached to the back surface of the liquid crystal display body 1. The cooling unit 2 may be attached to the front surface of the liquid crystal display body 1 and provided integrally with the liquid crystal display body 1. Therefore, in this case, the cooling layer 8 is formed by the upper glass substrate 4 and the cooling glass substrate 7, and the upper polarizing plate 3 is located at the above-mentioned position or the cooling glass placed on the front surface. It is provided on the outer surface (front surface) of the substrate 7.
【0014】[0014]
【発明の効果】以上詳細に説明したように、この発明の
液晶表示装置は、液晶を内蔵する液晶層を持った表示体
と、この表示体に密接して設けられ冷媒を前記表示体の
表示領域に対応させて充填した冷却層を持った冷却部
と、この冷却部の前記表示体とは反対側に配置した偏光
板とを備え、前記冷却部は前記表示体の表示領域に対応
した部分を透明部材で構成したので、冷却層と液晶表示
体が密接するので冷却層は液晶表示体を効率よく冷却で
きるし、また熱をおびやすい偏光板の1つを液晶表示体
から離せるので液晶表示体が過熱されにくく、冷却部に
冷媒を充填したので冷媒による表示のムラが起こりにく
いという効果もあわせ持つ。As described above in detail, in the liquid crystal display device of the present invention, a display body having a liquid crystal layer containing a liquid crystal, and a coolant provided in close contact with the display body to display the display body. a cooling unit having a cooling layer which is Hama charge in correspondence to the region, this includes a polarizing plate arranged on the side opposite to the display body of the cooling unit, the cooling unit is in the display area of the display body Since the part is composed of a transparent member, the cooling layer and the liquid crystal display are in close contact with each other, so that the cooling layer can efficiently cool the liquid crystal display, and one of the polarizing plates that easily absorb heat can be separated from the liquid crystal display. hardly liquid crystal display body is overheated, even with combined effect hardly occurs display unevenness due to refrigerant since Hama refrigerant charge in the cooling section.
【図1】この発明の一実施例を示す液晶表示装置の斜視
図。FIG. 1 is a perspective view of a liquid crystal display device showing an embodiment of the present invention.
【図2】同液晶表示装置の側面図。FIG. 2 is a side view of the liquid crystal display device.
【図3】一部を欠截して示す同液晶表示装置の平面図。FIG. 3 is a plan view of the liquid crystal display device showing a part of the liquid crystal display device.
【図4】他の実施例で示す液晶表示装置の一部欠截の平
面図。FIG. 4 is a partially cutaway plan view of a liquid crystal display device according to another embodiment.
【図5】同上の斜視図。FIG. 5 is a perspective view of the same.
【符号の説明】 1 液晶表示体 2 冷却部 8 冷却層 9、10 循環口 11 液晶層[Explanation of reference numerals] 1 liquid crystal display 2 cooling unit 8 cooling layer 9 10 circulation port 11 liquid crystal layer
Claims (1)
示領域に対応させて充填した冷却層を持った冷却部と、 この冷却部の前記表示体とは反対側に配置した偏光板と
を備え、 前記冷却部は前記表示体の表示領域に対応した部分を透
明部材としたことを特徴とする液晶表示装置。1. A display element having a liquid crystal layer having a built-in liquid crystal, is provided in close contact with the display body, the cooling unit having a cooling layer which is Hama charged by the refrigerant in correspondence to the display area of the display body And a polarizing plate arranged on the side of the cooling unit opposite to the display body, wherein the cooling unit has a transparent member in a portion corresponding to the display region of the display body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4185667A JP2535709B2 (en) | 1992-06-22 | 1992-06-22 | Liquid crystal display |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4185667A JP2535709B2 (en) | 1992-06-22 | 1992-06-22 | Liquid crystal display |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60173034A Division JPS6232422A (en) | 1985-08-06 | 1985-08-06 | Liquid crystal display device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05188361A JPH05188361A (en) | 1993-07-30 |
JP2535709B2 true JP2535709B2 (en) | 1996-09-18 |
Family
ID=16174767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4185667A Expired - Lifetime JP2535709B2 (en) | 1992-06-22 | 1992-06-22 | Liquid crystal display |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2535709B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006017786A (en) * | 2004-06-30 | 2006-01-19 | Hitachi Ltd | Liquid crystal projector and liquid-cooling device for liquid crystal panel thereof |
WO2022044730A1 (en) * | 2020-08-31 | 2022-03-03 | ソニーグループ株式会社 | Liquid crystal display device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6056025U (en) * | 1983-09-24 | 1985-04-19 | シャープ株式会社 | liquid crystal display device |
JPS6159316A (en) * | 1984-08-30 | 1986-03-26 | Seiko Instr & Electronics Ltd | Temperature control method of liquid crystal panel |
-
1992
- 1992-06-22 JP JP4185667A patent/JP2535709B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH05188361A (en) | 1993-07-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |