JPH04111585A - Projection television receiver - Google Patents
Projection television receiverInfo
- Publication number
- JPH04111585A JPH04111585A JP2229148A JP22914890A JPH04111585A JP H04111585 A JPH04111585 A JP H04111585A JP 2229148 A JP2229148 A JP 2229148A JP 22914890 A JP22914890 A JP 22914890A JP H04111585 A JPH04111585 A JP H04111585A
- Authority
- JP
- Japan
- Prior art keywords
- light
- projection
- light source
- screen
- television receiver
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 230000003321 amplification Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 239000004973 liquid crystal related substance Substances 0.000 description 24
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000009125 cardiac resynchronization therapy Methods 0.000 description 4
- 229910001507 metal halide Inorganic materials 0.000 description 3
- 150000005309 metal halides Chemical class 0.000 description 3
- 241000736839 Chara Species 0.000 description 2
- 231100000040 eye damage Toxicity 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Landscapes
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は小型の液晶型プロジェクタに用いて好適な投射
型テレビジョン受像機に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a projection television receiver suitable for use with a small liquid crystal projector.
本発明は小型の液晶型プロジェクタに用いて好適なもの
で光源から投射光学系を介してスクリーンに映像を投射
する様に成された投射型テレビジョン受像機に於いて、
投射光学系からスクリーンへの投射領域への移動体の侵
入を検知する検出手段と、検出手段からの検出出力に基
づいて光源の光出力を制御する制御手段とを有し、この
制御手段によって光源からの光出力を少なくとも低減或
は遮断させて光源の直視によって生ずる目の損傷を保護
する様に成したものである。The present invention is suitable for use in a small liquid crystal projector, and in a projection television receiver configured to project an image from a light source onto a screen via a projection optical system.
It has a detection means for detecting the intrusion of a moving object into the projection area from the projection optical system to the screen, and a control means for controlling the light output of the light source based on the detection output from the detection means. The light output from the light source is at least reduced or blocked to protect the eyes from damage caused by direct viewing of the light source.
従来から投射型テレビジョン受像機としてＣＲＴを用い
たものが多く使用されて来たが、最近では小型軽量で取
扱が容易な液晶型プロジェクタが提供されている。これ
ら液晶プロジェクタも背面投射型、前面投射型があるが
、前面投射型が多く利用され光学系を介して２０〜１０
０インチの範囲でスクリーンサイズが自由に変えられる
様に成されている。Conventionally, many projection television receivers using CRTs have been used, but recently, liquid crystal projectors have been provided which are small, lightweight, and easy to handle. These liquid crystal projectors also come in rear projection types and front projection types, but the front projection type is often used and uses an optical system to
The screen size can be changed freely within a range of 0 inches.
第６図は従来の前面投射型液晶プロジェクタの光学系を
示す路線図を示すもので、同図で（１）はスクリーン、
（２）は投射用レンズ、（３）は光源を示し、光源（３
）から出た光はＲ（赤）、Ｇ（緑）、Ｂ（青）全反射ミ
ラー（４）で反射し、Ｒダイクロイックミラー（５）で
Ｇ、 Ｂが透過してＲを反射する、この反射されたＲ
は全反射ミラー（８）で再び反射される。Ｒダイクロイ
ックミラー（５）を透過したＧ、ＢはＢダイクロイック
ミラー（６）でＧを透過し、Ｂを反射させＢダイクロイ
ックミラー（６）で透過したＧは全反射ミラー（７）で
反射される。全反射ミラー（８）で反射されたＲはコン
デンサレンズ（９）とＲ液晶パネル（１０）を介してＢ
ダイクロイックミラー（１１）を透過する。Ｂダイクロ
イックミラー（６）で反射したＢはコンデンサレンズ（
１２）とＢ液晶パネル（１３）を通してＢダイクロイッ
クミラー（１１）で反射する。全反射ミラー（７）で反
射したＧはコンデンサレンズ（１４）とＧ液晶パネル０
５）を介してＧダイクロイックミラー （１６）でＧを
反射させる。Ｂダイクロイックミラー （１１）を透過
したＲとこのミラーで反射したＢはＧダイクロイックミ
ラー０６）を透過し、Ｒ，Ｇ、Ｂの三原色信号成分は投
射用レンズ（２）に入射されて、スクリーン（１）上に
映像を投影する。Figure 6 shows a route map showing the optical system of a conventional front projection type liquid crystal projector, in which (1) is a screen;
(2) is the projection lens, (3) is the light source, and the light source (3) is the projection lens.
) is reflected by the R (red), G (green), and B (blue) total reflection mirror (4), and the R dichroic mirror (5) transmits G and B and reflects the R. reflected R
is reflected again by the total reflection mirror (8). G and B transmitted through the R dichroic mirror (5) are transmitted through the B dichroic mirror (6), which reflects B, and the G transmitted through the B dichroic mirror (6) is reflected by the total reflection mirror (7). . R reflected by the total reflection mirror (8) passes through the condenser lens (9) and the R liquid crystal panel (10) to B.
It passes through the dichroic mirror (11). The B reflected by the B dichroic mirror (6) is reflected by the condenser lens (
12) and the B liquid crystal panel (13) and is reflected by the B dichroic mirror (11). The G reflected by the total reflection mirror (7) is reflected by the condenser lens (14) and the G liquid crystal panel 0.
5) and reflect G at the G dichroic mirror (16). R transmitted through the B dichroic mirror (11) and B reflected by this mirror are transmitted through the G dichroic mirror 06), and the three primary color signal components of R, G, and B are incident on the projection lens (2) and projected onto the screen ( 1) Project the image onto the screen.
上述の如き液晶型プロジェクタではＣＲＴ型のプロジェ
クタに比べてＴ Ｆ Ｔ （Ｔｈｉｎ Ｆｉｌｍ Ｔｒ
ａｎ−ｓｉｓｔｏｒ）やＸＹ電極等が集積化されている
ために光の利用効率は悪く、面積的に全面積の半分以下
でしかシャッタとして利用出来ないだけでなく、２枚の
偏光板を用いるために光の利用率は１０％程度に低下す
る。この様な点を充分にカバー出来る様に光源（３）と
しては輝度の高いハロゲン、メタルハライドランプ等が
用いられている。例えばメタルハライドランプは高圧水
銀蒸気中に金属蒸気を混入させた放電灯で発光効率も高
く、極めて高輝度が得られる。The liquid crystal type projector as mentioned above has TFT (Thin Film Tr) compared to the CRT type projector.
Not only is the efficiency of light utilization poor because the an-sister) and XY electrodes are integrated, and less than half of the total area can be used as a shutter, but also because two polarizing plates are used. The light utilization rate drops to about 10%. In order to sufficiently cover such points, a high-luminance halogen lamp, metal halide lamp, or the like is used as the light source (3). For example, a metal halide lamp is a discharge lamp in which metal vapor is mixed into high-pressure mercury vapor, and has high luminous efficiency and can provide extremely high brightness.
上述の様な液晶型プロジェクタ等を用いてハイビジョン
映像信号を投影する場合などでは、更に明るい光源が要
求される。又、液晶型プロジェクタではＣＲＴ型に比べ
れば極めて小型化し易く、光源系も小口径レンズが利用
されているために投射用レンズ（２）近傍の光束密度（
照度）は極めて大きくなる傾向にあり、投射用レンズを
裸眼でのぞく等で直視する様な事があると眼に損傷を起
し、失明をまねく恐れもあり極めて危険を伴なう問題が
あった。この様な危険を防止するためにプロジェクタに
注意をうながす為の注意書を貼付けるにとどまっていた
。When a high-definition video signal is projected using a liquid crystal projector as described above, an even brighter light source is required. Furthermore, compared to CRT type projectors, liquid crystal projectors are much easier to downsize, and the light source system uses a small aperture lens, so the luminous flux density near the projection lens (2) is
The illuminance (illuminance) tends to be extremely high, and if you look directly into the projection lens with the naked eye, it can cause eye damage and even lead to blindness, creating an extremely dangerous problem. . In order to prevent such dangers, the only thing that has been done is to attach a cautionary note to the projector.
本発明は叙上の問題点を解消するために成されたもので
、その目的とするところは光源直視による危険を防止し
得る投射型テレビジョン受像機を提供するにある。The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a projection type television receiver that can prevent the danger of looking directly at a light source.
本発明の投射型テレビジョン受像機は、その例が第１図
に示されている様に、光源（３）から投射光学系（２）
を介してスクリーン（１）に映像を投射する様に成され
た投射型テレビジョン受像機に於いて、投射光学系（２
）から、スクリーン（１）への投射領域への移動体の侵
入を検知する検出手段（１８ａ） （１８ｂ）と、この
検出手段（１８ａ） （１８ｂ）からの検出出力に基づ
いて光源（３）の光出力を制御する制御手段（１９）と
を有し、この制御手段（１９）によって光源（３）から
の光出力を少くとも低減或は遮断させて成るものである
。As an example of the projection type television receiver of the present invention is shown in FIG.
In a projection type television receiver configured to project an image onto a screen (1) via a projection optical system (2), a projection optical system (2) is used.
), detecting means (18a) (18b) for detecting the intrusion of a moving object into the projection area of the screen (1), and a light source (3) based on the detection output from the detecting means (18a) (18b). A control means (19) for controlling the light output of the light source (3) is provided, and the light output from the light source (3) is at least reduced or cut off by the control means (19).
［作用］
本発明の投射型テレビジョン受像機によれば、プロジェ
クタの光学系からスクリーンへの投射領域に移動体の人
等が侵入すると、これを検知し光源を遮断又は減光した
り、液晶パネルの輝度信号を制御して遮断或は減衰させ
る様にしたので、光源を直視することで眼に損傷を受け
ることのない投射型テレビジョン受像機が得られる。[Function] According to the projection television receiver of the present invention, when a moving person or the like enters the projection area from the optical system of the projector to the screen, this is detected and the light source is shut off or dimmed, and the liquid crystal Since the luminance signal of the panel is controlled to be blocked or attenuated, a projection type television receiver that does not cause eye damage by looking directly at the light source can be obtained.
以下、本発明の投射型テレビジョン受像機を液晶型プロ
ジェクタ適用した例を第１図及び第２図によって説明す
る。本例の液晶プロジェクタ（２０）は従来の第６図で
説明した構成と同一の光学系であるので、これを簡略化
して第１図に示しである。An example in which the projection television receiver of the present invention is applied to a liquid crystal projector will be described below with reference to FIGS. 1 and 2. Since the liquid crystal projector (20) of this example has the same optical system as the conventional structure explained in FIG. 6, this is shown in FIG. 1 in a simplified manner.
スクリーン（１）の左右両側端にはコーナーキープ、キ
ャラアイ、コーナミラー等の反射部材（２１ａ）（２１
ｂ）が配設される。この反射部材（２１ａ） （２１ｂ
）はスクリーン（１）の前面に配設したものを示したが
、スクリーン（１）の左右側面に破線で示す様に並設し
てもよい。この反射部材（２１ａ） （２１ｂ）は光の
入射方向に反射されるキャラアイ等の光再帰性部材を板
材に多数貼着させたものを用いるを可とする。Reflective members (21a) (21a) such as corner keep, character eye, corner mirror etc.
b) is provided. This reflective member (21a) (21b
) are shown disposed on the front of the screen (1), but they may also be disposed side by side on the left and right sides of the screen (1) as shown by broken lines. The reflecting members (21a) and (21b) may be made by pasting a large number of light-reflecting members such as Chara's Eye, which reflect light in the direction of incidence, on a plate material.
液晶プロジェクタ（２０）の筐体（２２）の投射用レン
ズ（２）が配設される側に映像投射光に影響を与えない
赤外線等の非可視光を発光させ発光素子と、この赤外線
を受光するための受光素子とから成るフォトインクラブ
タの如き送受光検知装置（２２ａ）（２２ｂ）が配設さ
れている。送受光検知装置の１例を第２図に示す。第２
図で、（２３）はケーシングで、発光素子（２０）と受
光素子（２５）が内蔵され、発光素子（２４）からの赤
外光は反射ミラー（２６）で反射され、ケーシング（２
３）の窓部に設けたレンズ（２７）を介して、反射部材
（２１ａ） （２１ｂ）方向に出射され、この出射光を
移動体である人間が第１図示の矢印Ｂ方向から遮断すれ
ば、反射部材（２１ａ） （２１ｂ）からの反射光は窓
部のレンズ（２７）、反射ミラー（２６）を透過してレ
ンズ系（２８）でＰＩＮダイオード等の受光素子（２５
）の表面に焦点合せの行なわれている受光部に入射する
光が遮断され、人間が投射用レンズ（２）とスクリーン
（１）間の領域に侵入したことを検知する。A light emitting element is provided on the side of the housing (22) of the liquid crystal projector (20) on which the projection lens (2) is disposed to emit invisible light such as infrared light that does not affect the image projection light, and a light emitting element is provided to receive the infrared light. Light transmitting/receiving detecting devices (22a) (22b) such as photo ink actuators, which are composed of a light receiving element and a light receiving element, are provided. An example of a light transmission/reception detection device is shown in FIG. Second
In the figure, (23) is a casing in which a light emitting element (20) and a light receiving element (25) are built in, and infrared light from the light emitting element (24) is reflected by a reflecting mirror (26).
3) is emitted in the direction of the reflecting members (21a) and (21b) through the lens (27) provided in the window, and if a moving person blocks this emitted light from the direction of arrow B shown in the first figure. , the reflected light from the reflecting members (21a) and (21b) passes through the window lens (27) and the reflecting mirror (26), and passes through the lens system (28) to a light receiving element (25) such as a PIN diode.
) The light incident on the light receiving section, which is focused on the surface of the projection lens (2), is blocked, and it is detected that a person has entered the area between the projection lens (2) and the screen (1).
これら送受光検知装置（２２ａ） （２２ｂ）の受光素
子（２５）からの光を電気信号に変換した検知出力は各
々増幅回路（１７ａ） （１７ｂ）に供給されて増幅さ
れ、各々検出回路（１８ａ） （１８ｂ）で遮断状態を
検知し、この検知出力に基づいて光制御回路（１９）に
供給される。光制御回路（１９）では検知出力に応して
光源（３）を駆動する光源駆動回路（３０）を「オフ」
状態にするか、光源（３）の光を減光する様にに制御す
る。かくすれば、光源（３）のハロゲンランプ又はメタ
ルハライドランプは消灯されるかその発光輝度が著しく
弱められ、もし、光源を直視する様なことがあっても眼
に損傷を与える様なことのない投射型テレビジョン受像
機が得られる。The detection outputs obtained by converting the light from the light receiving elements (25) of these light transmitting/receiving detection devices (22a) (22b) into electrical signals are supplied to the amplifier circuits (17a) (17b) and amplified, respectively. ) (18b) detects the cut-off state, and supplies the light control circuit (19) based on this detection output. The light control circuit (19) turns off the light source drive circuit (30) that drives the light source (3) according to the detection output.
control the light source (3) so as to reduce the light from the light source (3). In this way, the halogen lamp or metal halide lamp serving as the light source (3) will be turned off or its luminance will be significantly weakened, so that even if you look directly at the light source, there will be no damage to your eyes. A projection television receiver is obtained.
第３図は本発明の投射型テレビジョン受像機の他の実施
例を示すもので、第１図との対応部分には同一符号を付
して重複説明を省略する。本例の液晶プロジェクタ（２
０）の投射用レンズ（２）側に取り付けられる送受光検
知装置は第４図に示す様に構成させる。第４図で、ケー
シング（２３）内には発光素子（２４）と受光素子（２
５）が配設されている。発光素子（２４）からの赤外光
はコンデンサレンズ（３３）及びハーフミラ−（３４）
を通して回転鏡（３５）に焦点を結び、回転鏡（３５）
で反射された光はパラポーラ状の鏡（３６）上に細長い
帯状の焦点を結ぶ、回転鏡（３５）が回転することでパ
ラポーラ状の鏡（３６）に沿って矢印Ａ−Ａ方向に反射
光（３７）は移動する。この反射光（３７）はスクリー
ン（１）の左右側部に紙面方向に縦長に配設された反射
部材（２１ａ） （２１ｂ）に沿ってＡ−Ａ方向に移動
する。この反射光（３７）はキャラアイ等の光再帰性部
材によって入射方向に再反射し、この再反射光（３８）
は窓（３９）を介してパラポーラ状の鏡（３６）で反射
し回転鏡（３５）を介してハーフミラ−（３３）に至り
、このハーフミラ−（３３）で反射された再反射光（３
８）はレンズ系（２８）を介して受光素子（２５）に焦
点を結び、光信号は電気信号に変換される。即ち、本例
では送受光検知装置（２２ｃ）（２２ｄ）から出射され
た赤外光はスクリーンの左右側部に上側から下側に向っ
て配設した縦長の反射部材（２１ａ） （２１ｂ）上を
上側から下側に高速に走査し、スクリーン（１）と投射
用レンズ（２）間の領域に矢印Ｂ方向から入って来た人
間を検知する。即ち再帰性部材で反射された再反射光（
３８）は人の侵入によって遮断される。この遮断状態を
示す検知信号は受光素子（２５）から増幅回路（１７ａ
） （１７ｂ）、検出回路（１８ａ） （１８ｂ）に供
給されて検出回路（１８ａ） （１８ｂ）からの遮断状
態検出出力は映像制御回路（３１）に供給され液晶駆動
回路（３２）の駆動状態を制御する。その結果、液晶パ
ネルのシャッタを閉じた状態としたり、輝度信号成分を
弱くする様な制御を行なう様にする。FIG. 3 shows another embodiment of the projection type television receiver of the present invention, and parts corresponding to those in FIG. 1 are denoted by the same reference numerals and redundant explanation will be omitted. The LCD projector in this example (2
The light transmitting/receiving detection device attached to the projection lens (2) side of 0) is constructed as shown in FIG. In Fig. 4, inside the casing (23) there is a light emitting element (24) and a light receiving element (2).
5) is provided. Infrared light from the light emitting element (24) is transmitted through a condenser lens (33) and a half mirror (34).
Focus the rotating mirror (35) through the rotating mirror (35).
The light reflected by the mirror (36) focuses on a long strip on the parapolar mirror (36).As the rotating mirror (35) rotates, the light is reflected along the parapolar mirror (36) in the direction of arrow A-A. (37) moves. This reflected light (37) moves in the A-A direction along reflection members (21a) (21b) arranged vertically in the plane of the paper on the left and right sides of the screen (1). This reflected light (37) is re-reflected in the incident direction by a light-reflecting member such as Chara Eye, and this re-reflected light (38)
The light is reflected by the parapolar mirror (36) through the window (39), reaches the half mirror (33) through the rotating mirror (35), and the re-reflected light (3) reflected by the half mirror (33)
8) focuses on a light receiving element (25) via a lens system (28), and the optical signal is converted into an electrical signal. That is, in this example, the infrared light emitted from the light transmission/reception detection devices (22c) (22d) is reflected on the vertically long reflecting members (21a) (21b) disposed on the left and right sides of the screen from the top to the bottom. is scanned at high speed from the upper side to the lower side, and a person entering the area between the screen (1) and the projection lens (2) from the direction of arrow B is detected. In other words, the re-reflected light (
38) is blocked by human intrusion. A detection signal indicating this cutoff state is transmitted from the light receiving element (25) to the amplifier circuit (17a).
) (17b), and the cutoff state detection output from the detection circuits (18a) (18b) is supplied to the video control circuit (31) to determine the drive state of the liquid crystal drive circuit (32). control. As a result, control is performed such as closing the shutter of the liquid crystal panel or weakening the luminance signal component.
上述の実施例では発光素子として赤外線を用いた例を説
明したが、これは超音波等であってもよい。又、送受光
検知装置（２２ａ） （２２ｂ） （２２ｃ） （２２
ｄ）をスクリーン（１）の左右側部側に設け、液晶プロ
ジェクタ（２０）側に反射部材（２１ａ） （２１ｂ）
を設ける様にしてよい。又、第１図及び第３図で矢印Ｂ
方向から人が侵入して来て、検知装置（２２ａ） （２
２ｃ）で光源（３）又は液晶パネル（１０） （１３）
（１５）等を「オフ」する様に制御し、次に投射領域
を通過して、検知装置（２２ｂ） （２２ａ）で人の通
過を確認した時には光源（３）又は液晶パネル（１０）
（１３） （１５）をＵオン」する様に自動的に制御
することも出来る。この様な侵入者の方向を検知するた
めには受光素子（２５）を複数個、矢印Ｂ方向に沿って
並べて配設することで容易に検知出来る。In the above-described embodiment, an example was explained in which infrared rays were used as the light emitting element, but ultrasonic waves or the like may also be used. In addition, light transmission/reception detection devices (22a) (22b) (22c) (22
d) are provided on the left and right sides of the screen (1), and reflective members (21a) (21b) are provided on the liquid crystal projector (20) side.
It may be possible to provide Also, in Figures 1 and 3, arrow B
If a person enters from any direction, the detection device (22a) (2
2c) with light source (3) or LCD panel (10) (13)
(15) etc., and then when the person passes through the projection area and the detection device (22b) (22a) confirms the passage of the person, the light source (3) or the liquid crystal panel (10) is turned off.
(13) It is also possible to automatically control so that (15) is turned on. The direction of such an intruder can be easily detected by arranging a plurality of light receiving elements (25) in line along the direction of arrow B.
第５図は本発明の投射型テレビジョン受像機の更に他の
実施例を示すものである。第５図の場合は液晶プロジェ
クタ（２０）の投射用レンズ（２）の前面には受光素子
或は光電素子（４０ａ） （４０ｂ）が取り付けられ、
スクリーン（１）の前面には光再帰性部材等より成る反
射部材（２１ａ） （２１ｂ）が配設されている。投射
用レンズ（２）を介してスクリーン（１）に投射される
映像信号の反射光（４１）を受光素子或は光電素子（４
０ａ） （４０ｂ）が検知し、その遮断状態の検出信号
を増幅回路（１７ａ） （１７ｂ）で増幅した後に検出
回路（１８ａ）（１８ｂ）で検出し、シャッタ制御回路
（４２）に供給することで、シャッタ駆動回路（４３）
を制御する。シャッタ駆動回路（４３）は光源（３）と
コンデンサレンズ（９） （１２） （１４）間に配設
されている機械的なシャッタ（４４）を回動させて、光
源（３）からの光を遮断する様に成したものである。FIG. 5 shows still another embodiment of the projection type television receiver of the present invention. In the case of FIG. 5, a light receiving element or photoelectric element (40a) (40b) is attached to the front surface of the projection lens (2) of the liquid crystal projector (20).
Reflection members (21a) (21b) made of a light-reflecting member or the like are arranged in front of the screen (1). The reflected light (41) of the video signal projected onto the screen (1) via the projection lens (2) is transmitted to a light receiving element or a photoelectric element (4).
0a) (40b) detects, and the detection signal of the cutoff state is amplified by the amplifier circuit (17a) (17b), and then detected by the detection circuit (18a) (18b) and supplied to the shutter control circuit (42). And the shutter drive circuit (43)
control. The shutter drive circuit (43) rotates a mechanical shutter (44) disposed between the light source (3) and the condenser lenses (9), (12), and (14) to block the light from the light source (3). It was designed to block the
本例の各実施例では液晶型プロジェクタについて説明し
たが、通常のＣＲＴを用いたプロジェクタに本発明を適
用し得ることは勿論であり、投射領域への人間の侵入検
出は光に限らず電波やＣＣＤリニアセンサを用いる等、
本発明の要旨を逸脱しない範囲で種々変更し得ることは
明白である。In each of the embodiments, a liquid crystal projector has been described, but it goes without saying that the present invention can be applied to a projector using a normal CRT, and the detection of human intrusion into the projection area is not limited to light, but can also be performed using radio waves. Using CCD linear sensor, etc.
It is obvious that various changes can be made without departing from the spirit of the invention.
本発明の投射型テレビジョン受像機によれば光源の直視
によって目の損傷を生ずることのない安全なプロジェク
タを得ることが出来る。According to the projection type television receiver of the present invention, it is possible to obtain a safe projector that does not cause damage to the eyes due to direct viewing of the light source.
第１図は本発明の投射型テレビジョン受像機の一実施例
を示す系統図、第２図は本発明の第１図に用いる送受信
検知装置の一実施例を示す構成図、第３図は本発明の投
射型テレビジョン受像機の他の実施例を示す系統図、第
４図は第３図に用いる送受信検知装置の構造図、第５図
は本発明の投射型テレビジョン受像機の更に他の実施例
を示す系統図、第６図は従来の前面投射型液晶プロジェ
クタの光源系を示す路線図である。
（１）はスクリーン、（２）は投射用レンズ、（３）は
光源、（１０） （１３） （１５）は液晶パネル、（
２ｏ）は液晶プロジェクタ、（２２ａ）〜（２２ｄ）は
送受光検知装置である。FIG. 1 is a system diagram showing an embodiment of the projection type television receiver of the present invention, FIG. 2 is a configuration diagram showing an embodiment of the transmission/reception detection device used in FIG. 1 of the present invention, and FIG. A system diagram showing another embodiment of the projection television receiver of the present invention, FIG. 4 is a structural diagram of the transmission/reception detection device used in FIG. 3, and FIG. 5 is a system diagram showing another embodiment of the projection television receiver of the present invention. A system diagram showing another embodiment, FIG. 6 is a route diagram showing a light source system of a conventional front projection type liquid crystal projector. (1) is the screen, (2) is the projection lens, (3) is the light source, (10) (13) (15) is the liquid crystal panel, (
2o) is a liquid crystal projector, and (22a) to (22d) are light transmission/reception detection devices.
Claims (1)
る様に成された投射型テレビジョン受像機に於いて、 上記投射光学系から上記スクリーンへの投射領域への移
動体の侵入を検知する検出手段と、該検出手段からの検
出出力に基づいて上記光源の光出力を制御する制御手段
とを有し、 上記制御手段によって上記光源からの光出力を少なくと
も低減或は遮断させて成ることを特徴とする投射型テレ
ビジョン受像機。[Scope of Claims] In a projection type television receiver configured to project an image from a light source onto a screen via a projection optical system, a moving object moves from the projection optical system to the projection area on the screen. and a control means for controlling the light output of the light source based on the detection output from the detection means, wherein the control means at least reduces or blocks the light output from the light source. A projection type television receiver characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2229148A JPH04111585A (en) | 1990-08-30 | 1990-08-30 | Projection television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2229148A JPH04111585A (en) | 1990-08-30 | 1990-08-30 | Projection television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04111585A true JPH04111585A (en) | 1992-04-13 |
Family
ID=16887528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2229148A Pending JPH04111585A (en) | 1990-08-30 | 1990-08-30 | Projection television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04111585A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001249399A (en) * | 1999-12-28 | 2001-09-14 | Sony Corp | Image-projecting method and apparatus |
| WO2003104892A1 (en) * | 2002-06-10 | 2003-12-18 | ソニー株式会社 | Image projector and image projecting method |
| JP2004070298A (en) * | 2002-06-10 | 2004-03-04 | Sony Corp | Image projector and image projecting method |
| JP2004354502A (en) * | 2003-05-27 | 2004-12-16 | Sony Corp | Projection type image display device and screen |
| JP2005173097A (en) * | 2003-12-10 | 2005-06-30 | Sony Corp | Image display apparatus and method of controlling the same |
| US7018055B2 (en) | 2003-07-09 | 2006-03-28 | Sony Corporation | Image projecting device and image projecting method |
| JP2006098789A (en) * | 2004-09-29 | 2006-04-13 | Casio Comput Co Ltd | Projecting apparatus, projecting method and program |
| JP2006330447A (en) * | 2005-05-27 | 2006-12-07 | Mitsubishi Electric Corp | Front projector |
| JP2007233076A (en) * | 2006-03-01 | 2007-09-13 | Seiko Epson Corp | Projection device and program |
| US7976174B2 (en) | 2007-02-26 | 2011-07-12 | Z-Laser Optoelektronik Gmbh | Method and apparatus for projecting an optical projection onto a projection surface |
-
1990
- 1990-08-30 JP JP2229148A patent/JPH04111585A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001249399A (en) * | 1999-12-28 | 2001-09-14 | Sony Corp | Image-projecting method and apparatus |
| WO2003104892A1 (en) * | 2002-06-10 | 2003-12-18 | ソニー株式会社 | Image projector and image projecting method |
| JP2004070298A (en) * | 2002-06-10 | 2004-03-04 | Sony Corp | Image projector and image projecting method |
| US7364309B2 (en) | 2002-06-10 | 2008-04-29 | Sony Corporation | Image projector and image projecting method |
| JP2004354502A (en) * | 2003-05-27 | 2004-12-16 | Sony Corp | Projection type image display device and screen |
| JP4513279B2 (en) * | 2003-05-27 | 2010-07-28 | ソニー株式会社 | Image display device |
| US7018055B2 (en) | 2003-07-09 | 2006-03-28 | Sony Corporation | Image projecting device and image projecting method |
| JP2005173097A (en) * | 2003-12-10 | 2005-06-30 | Sony Corp | Image display apparatus and method of controlling the same |
| JP2006098789A (en) * | 2004-09-29 | 2006-04-13 | Casio Comput Co Ltd | Projecting apparatus, projecting method and program |
| JP2006330447A (en) * | 2005-05-27 | 2006-12-07 | Mitsubishi Electric Corp | Front projector |
| JP2007233076A (en) * | 2006-03-01 | 2007-09-13 | Seiko Epson Corp | Projection device and program |
| US7976174B2 (en) | 2007-02-26 | 2011-07-12 | Z-Laser Optoelektronik Gmbh | Method and apparatus for projecting an optical projection onto a projection surface |
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