JPS58191580A - Projective type television device - Google Patents

Projective type television device

Info

Publication number
JPS58191580A
JPS58191580A JP7624582A JP7624582A JPS58191580A JP S58191580 A JPS58191580 A JP S58191580A JP 7624582 A JP7624582 A JP 7624582A JP 7624582 A JP7624582 A JP 7624582A JP S58191580 A JPS58191580 A JP S58191580A
Authority
JP
Japan
Prior art keywords
screen
axis
projection
picture
cabinet
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
Application number
JP7624582A
Other languages
Japanese (ja)
Inventor
Osamu Sakai
修 酒井
Kazuki Maeda
前田　八起
Hideki Ishinaga
秀樹 石永
Katsumi Goto
勝美 後藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7624582A priority Critical patent/JPS58191580A/en
Publication of JPS58191580A publication Critical patent/JPS58191580A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

PURPOSE:To project a picture with the optimum lightness, in case of observing a screen from upward or downward accordingly, by shifting the projective axis of the picture downward or upward in reference to the axis of the screen, and tilting the screen of a CRT to the projective axis. CONSTITUTION:The front side of a cabinet 1 is provided with a transmission type screen 2, the back side of the screen 2 is provided with a projecting CRT3 projecting the TV picture, a lens system 4 and reflecting mirrors 5, 6, and the entire parts are contained in a cabinet 1. The position of the CRT3, the lens system 4 and the reflecting mirrors 5, 6 is set so as to shift a projecting axis 7 downward or upward by a prescribed angle alpha from the axis 8 of the screen 2. The screen of the CRT is tilted to the projecting axis 7 by alpha/m (where; m is the magnification factor of picture). In observing the screen 2 upward or downward, the picture with the optimum lightness is observed accordingly.

Description

【発明の詳細な説明】 本発明は、いわゆるリヤータイプの投写形テレビジョン
装置に関し、そのスクリーンを前方上方もしくは下方か
ら見る場合に明るい画像を得ることのできる装置を提供
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called rear-type projection television device, and provides a device that can provide a bright image when viewing the screen from above or below.

いわゆるリヤータイプといわれる投写形テレビジョン装
置は、従来には第１図に示すように構成されている。こ
こで、１はキャビネットであり、その前面上方位置に透
過形のスクリーン２を設けるとともに、スクリーン２に
対して裏面側からテレビジョン画像を投写するように、
投写用陰極線管３．レンズ系４および反射鏡６，６をキ
ャビネット１の内部に収納している。A so-called rear type projection television apparatus has conventionally been constructed as shown in FIG. Here, reference numeral 1 denotes a cabinet, and a transmissive screen 2 is provided above the front of the cabinet, and a television image is projected onto the screen 2 from the back side.
Cathode ray tube for projection3. A lens system 4 and reflecting mirrors 6, 6 are housed inside the cabinet 1.

ところが、このような従来の装置においては、投写用陰
極線管３からのテレビジョン画像の投写軸７をスクリー
ン２の軸８と合致させるように各部の構成や位置が設定
されていたため、視聴者がスクリーン２の前方でその軸
８の延長線上の位置からスクリーン２を見ているときに
は画像が明るく見えても、それよりも上方の位置や下方
の位置から見た場合には画像が暗くなってしまうという
欠点があった。たとえば、販売店において装置を床面に
置き、立った状態で前方上方からスクリーン２を見下ろ
す場合に暗く見えてしまうという不都合がある。However, in such conventional devices, the configuration and position of each part are set so that the projection axis 7 of the television image from the projection cathode ray tube 3 coincides with the axis 8 of the screen 2. Even if the image appears bright when viewing the screen 2 from a position in front of the screen 2 on the extension of the axis 8, the image becomes darker when viewed from a position above or below. There was a drawback. For example, when the device is placed on the floor at a store and one stands looking down at the screen 2 from above, there is an inconvenience that the screen 2 appears dark.

そこで、本発明はかかる従来の不都合を解消して、スク
リーンに対し上方あるいは下方からスクリーンを見た場
合に明るく見えるようにテレビジョン画像を投写映出す
ることのできるリヤータイプの投写形テレビジョン装置
を提供することを目的とするものである。SUMMARY OF THE INVENTION Accordingly, the present invention provides a rear-type projection television device capable of resolving such conventional inconveniences and projecting a television image so that the screen appears bright when viewed from above or below. The purpose is to provide the following.

以下、本発明につき、その一実施例を示す第２図、第３
図を参照して詳細に説明する。この実施例は、販売店に
おいて前方上方からスクリーンを見下ろす場合に適した
装置である。なお、第１図中と対応する部分には同一番
号を付して説明する。Below, FIGS. 2 and 3 show one embodiment of the present invention.
This will be explained in detail with reference to the drawings. This embodiment is a device suitable for looking down on the screen from above at the front in a store. Note that parts corresponding to those in FIG. 1 will be described with the same numbers.

この装置においては、スクリーン２に対して、その軸８
よりも所定角度αだけ下方の投写軸７からテレビジョン
画像を投写するように、投写用陰極線管３．レンズ系４
および反射鏡６，６の位置を設定した点に特徴がある、
このように投写軸７を所定角度αだけ下方に移動させる
と、スクリーン２の前方からテレビジョン画像を見る場
合にその中心軸（光量最大の軸）方向がαだけＬ向きに
なり、従って、販売店において前方上方からスクリーン
２を見下ろした場合に最も明るい画像を得ることができ
る。In this device, the axis 8 of the screen 2 is
The projection cathode ray tube 3. Lens system 4
and the position of the reflecting mirrors 6, 6 is set.
When the projection axis 7 is moved downward by a predetermined angle α in this way, when viewing the television image from the front of the screen 2, the direction of the center axis (the axis with the maximum amount of light) will be oriented L by α, and therefore the sales The brightest image can be obtained when looking down on the screen 2 from above in front of the store.

ただし、このように投写軸７をスクリーン２のｌＱｌ＋
　ｓからずらせた場合にはスクリーン２上で画面の−Ｆ
部と下部にフォーカスずれを生じる場合があるので、第
３図に示すように、投写用陰極線管３の画像面９を投写
軸７に対してβ＝シｊ（ただし、ｍは投写画像の拡大率
）だけ傾けるようにする必四がある。However, if the projection axis 7 is set to lQl+ of the screen 2 in this way
If you shift it from s, press -F on screen 2.
As shown in FIG. There is a need to make sure that it is tilted by the same amount.

なお、以上の実施例はスクリーン２をその前方上方から
見下ろす場合について説明したが、逆に、本装置を和室
に置いて畳の上に座ったり寝ころんだりしてスクリーン
２をその前方下方から見−トげる場合には、投写軸７を
スクリーン２の軸８よりも所定角度だけ上方から投写す
るように設定すればよい。Although the above embodiment has been described with reference to the case where the screen 2 is viewed from above and in front of it, conversely, when the device is placed in a Japanese-style room, sitting or lying down on tatami mats, and the screen 2 is viewed from below and in front of it. In the case of raising the screen, the projection axis 7 may be set to project from above the axis 8 of the screen 2 by a predetermined angle.

このように、本発明の投写形テレビジョン装置によれば
、スクリーンへのテレビジョン画像の投写軸をスクリー
ンの軸に対して上方もしくは下方に所定角度αだけずら
せ、かつ、投写用陰極線管の画像面を投写軸に対してα
ｈだけ傾けるようにしたので、スクリーンを前方から見
下ろしたり見上げる場合にそれに応じて最適な明るい画
像を得ることができるものである。As described above, according to the projection television apparatus of the present invention, the axis of projection of the television image onto the screen is shifted upward or downward by the predetermined angle α with respect to the axis of the screen, and the image of the projection cathode ray tube is α to the projection axis
Since the screen is tilted by h, an optimum bright image can be obtained when looking down or looking up at the screen from the front.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の投写形テレビジョン装置の断側面図、第
２図は本発明の一実施例における投写形テレビジョン装
置の断側面図、第３図はその要部の側断面図である。 １・・・・・・キャビネット、２・・・・・・スクリー
ン、３・・・・・・投写用陰極線管、４・・・・・レン
ズ系、６，６・・・・・・反射鏡、７・・・・・・投写
軸、８・・・・・・スクリーンの軸、９・・・・・・画
像面。FIG. 1 is a cross-sectional side view of a conventional projection television device, FIG. 2 is a cross-sectional side view of a projection television device according to an embodiment of the present invention, and FIG. 3 is a side cross-sectional view of the main parts thereof. . 1... Cabinet, 2... Screen, 3... Cathode ray tube for projection, 4... Lens system, 6, 6... Reflector , 7...Projection axis, 8... Screen axis, 9... Image plane.

Claims (1)

【特許請求の範囲】[Claims] キャビネットの前面に透過形のスクリーンを設け、上記
スクリーンに裏面側からテレビジョン画像を投写する投
写用陰極線管、レンズ系および反射鏡を上記キャビネッ
ト内に収納して設けるとともに、上記スクリーンに対し
てその軸よりも所定角度αだけ下方もしくは上方の投写
軸から上記テレビジョン画像を投写するように上記投写
用陰極線管、レンズ系および反射鏡の位置を設定し、か
つ、上記投写用陰極線管の画像面をα／１（ただし、ｍ
は画像拡大率）だけ投写軸に対して傾けるようにしたこ
とを特徴とする投写形テレビジョン’８８１Ｊ！。A transmission type screen is provided in the front of the cabinet, and a projection cathode ray tube, a lens system, and a reflector for projecting a television image onto the screen from the back side are housed in the cabinet, and a transmission type screen is provided in the cabinet. The positions of the projection cathode ray tube, lens system, and reflector are set so that the television image is projected from a projection axis that is a predetermined angle α below or above the axis, and the image plane of the projection cathode ray tube is α/1 (where m
Projection type television '881J, which is characterized by being tilted with respect to the projection axis by an amount (image magnification ratio)! .
JP7624582A 1982-05-06 1982-05-06 Projective type television device Pending JPS58191580A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7624582A JPS58191580A (en) 1982-05-06 1982-05-06 Projective type television device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7624582A JPS58191580A (en) 1982-05-06 1982-05-06 Projective type television device

Publications (1)

Publication Number Publication Date
JPS58191580A true JPS58191580A (en) 1983-11-08

Family

ID=13599792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7624582A Pending JPS58191580A (en) 1982-05-06 1982-05-06 Projective type television device

Country Status (1)

Country Link
JP (1) JPS58191580A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60129780U (en) * 1984-02-10 1985-08-30 パイオニア株式会社 projection television
JPS60129781U (en) * 1984-02-10 1985-08-30 パイオニア株式会社 projection television
US4672458A (en) * 1984-12-28 1987-06-09 North American Philips Corporation Projection television systems having lens tilt compensation member

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60129780U (en) * 1984-02-10 1985-08-30 パイオニア株式会社 projection television
JPS60129781U (en) * 1984-02-10 1985-08-30 パイオニア株式会社 projection television
US4672458A (en) * 1984-12-28 1987-06-09 North American Philips Corporation Projection television systems having lens tilt compensation member

Similar Documents

Publication Publication Date Title
JP2001215642A (en) Multi-display device
US4918535A (en) Television projection system
JP3371654B2 (en) Projection display device
JPH0519346A (en) Projection type image display device
US6388810B1 (en) Rear-projection mirror arrangement
JPS58191580A (en) Projective type television device
US4202015A (en) Video projection system
US2474297A (en) Combination televeision receiver and picture projector
JP2659542B2 (en) Rear projection type projection TV
JPS6051087A (en) Projection type television receiver
JPS6160636B2 (en)
JP2005031270A (en) Video image projection device for dome screen
JPH05196888A (en) Front projection type display device
JP2511945B2 (en) Transparent screen
JPH10123976A (en) Large sized screen projection type display device
JPH04172436A (en) Liquid crystal projection device
JP3133051B2 (en) Projection display device
JP2723585B2 (en) Projection type liquid crystal display
KR100343964B1 (en) Projective Screen of Rear Projection Display Apparatus
JPH11149124A (en) Rear projection type display device
JPS58161480A (en) Projective type television receiver
JPH0470082A (en) Back projection type projector
JPH08227053A (en) Paintings and calligraphic works camera device
JPH0527328A (en) Rear projection type display device
JPH0678252A (en) Projection television receiver