TW450009B - Projection display system and device with high bandwidth wireless communication for projection display data - Google Patents

Projection display system and device with high bandwidth wireless communication for projection display data Download PDF

Info

Publication number
TW450009B
TW450009B TW088118781A TW88118781A TW450009B TW 450009 B TW450009 B TW 450009B TW 088118781 A TW088118781 A TW 088118781A TW 88118781 A TW88118781 A TW 88118781A TW 450009 B TW450009 B TW 450009B
Authority
TW
Taiwan
Prior art keywords
patent application
light
item
display
scope
Prior art date
Application number
TW088118781A
Other languages
Chinese (zh)
Inventor
Vaan Adrianus Johannes Step De
Marc Eugeen Adriaan Corthout
Franciscus Paulus Ma Budzelaar
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Application granted granted Critical
Publication of TW450009B publication Critical patent/TW450009B/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3105Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Projection Apparatus (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

A display system has projector means with image entering means that feed display panel means for generating one or more light beam channels for subsequent projection through optical imaging means. The system further has a screen subsystem for accommodating a projected image thereon, and also high-bandwidth light sensor means for immediate reception of projection display data from the image entering means. In particular, the light sensor means have been co-integrated with one or more solid-state display panels for receiving projection display data along one or more light beam channels within the projector means.

Description

450009 五、發明說明(1) 發明之背景 ,發明關於敘述於中請專利範圍第一項之前言之系統。 A1 484 5 7 1專利揭π 一供電視顯示之光學前投影系 丁U中之光學系統亦作為轉移紅外線信冑,該信號提供 旧號資訊至包含紅外㈣測器陣列之 ,#測器陣 =立:投影影像之外部。該參考亦提議經由空間分布之輸 送頻道發射RGB信號成份。 本發明人認為此種投影系統之逐漸 =有連續增加之可用轉移頻帶寬1此之:==造 4 Λ機二電Λ干擾效應日增關切,此點與被縮寫成為 及電磁相谷性相符。此一問題可 以減少至某一程度,但此種對策非常昂音3加連接之數目 之空間亦非常稀少投影機中 顯示器面板間之連接》 電子組件及 發明之概述 因此,在其他事中,本發明之一目的 顯示器面板之頻帶寬,同時避免不正當:二』投影機構至 計師自由將接收機零件置於投影機結構:祜=擾,使設 仍須避免接線問題。因此,根據本發明 2用空間,但 為根據申請專利範圍第丨項之特徵部份。、性,其特徵 …接收機陣列與一或多個顯示器面板共同統合 減設計師由E MC需求所加之負擔。事實 , 、1 ' 量不同轉換方向之光學元件可以被結合,* ',.涉及光能 統光軸目前已能實質上組合一致。一相同之光學系 相似之裝置係關於後450009 V. Description of the invention (1) Background of the invention. The invention is described in the first preface of the scope of the patent application. A1 484 5 7 1 Patent Unveiled An optical front projection system for TV display. The optical system in Ding U also serves as a transfer infrared signal. This signal provides old information to the array containing infrared detectors. # 测 器 阵 = Standing: the outside of the projected image. The reference also proposes transmitting RGB signal components via spatially distributed transmission channels. The inventor believes that the gradual = continuous increase of the available transfer frequency bandwidth of this projection system1 === 4 4 Λ machine two electric Λ interference effect is increasing, this point is consistent with the abbreviation and electromagnetic phase valley . This problem can be reduced to a certain degree, but this countermeasure is very vocal 3 plus the number of connections is very scarce. The connection between the display panels in the projector. Overview of electronic components and inventions. Therefore, among other things, this One purpose of the invention is to reduce the frequency bandwidth of the display panel, and at the same time to avoid improper: Second, the projection mechanism to the engineer to freely place the receiver parts in the projector structure: 祜 = interference, so the installation must still avoid wiring problems. Therefore, according to the present invention, a space is used, but it is a characteristic part according to the scope of the patent application. , Characteristics, characteristics ... The receiver array is integrated with one or more display panels to reduce the burden imposed by the designer on the needs of E MC. In fact, optical elements with different conversion directions of 1 and 1 'can be combined. *' ,. The optical axis of the light energy system can be substantially combined and matched at present. An identical optical system

第5頁 450 00 9Page 5 450 00 9

五,發明說明(2) 投影系統° 本發明亦關於在此系 之其他優異特性欽迷於 圖式之簡略說明 統中產生光束 附屬申請專利 之投影裝置 範圍中。 本發明 本發明此等優點其特性將稍後 予以詳述; 參考較佳具體實例及附 圖 圖1為本發明之實施; 圖2為光閥面板中之接收機之位置; 圖3為具有三輸送面板之新穎具體實 圖4為有二反射面板之新穎具體實例; 圖5為一機械内聯之具體實例· 圖6為偵測螢幕上變化之CCD陣列。 較佳具體實例之詳細說明 时圖1顯示實施本發明之一透視影像,為清晰起見,僅以 單一頻道代表。此系統可為一黑白顯示器。或經由多彩色 顯示面板以彩色顯示器實施。左方為投影機之外殼及投影 透鏡及影像區。後者之光閥可由LCD顯示器,一LED面板, 一可變形鏡裝置構成’其可選擇性改變反射方向,或其 它,及功能而作為物體。此物體被成影像並在右方之6 〇 ,, 之二腳支架螢幕上放大。作為聲頻_視頻資訊之源,一να 及一PC ’如圖所示。影像之下方,四個發射機陣列在 光系統中作為物體作業’其在左方之光閥區之上立即 成像。除Λ之外,投影機可有一或多個第二資料發^入鏡 元以自發射機-接收機陣列反方向轉移信號,如'_機單V. Description of the invention (2) Projection system ° The present invention is also fascinated by the brief description of the drawings about other excellent characteristics of this system. It generates light beams in the system. The advantages and characteristics of the present invention will be described in detail later; Figure 1 is an implementation of the present invention with reference to the preferred specific examples and the drawings; Figure 2 is the position of the receiver in the light valve panel; Novel and concrete implementation of the conveying panel Figure 4 is a novel and specific example with two reflective panels; Figure 5 is a specific example of a mechanical inline · Figure 6 is a CCD array that detects changes on the screen. Detailed description of the preferred embodiment. Fig. 1 shows a perspective image embodying the present invention. For clarity, it is represented by a single channel. This system can be a black and white display. Alternatively, it can be implemented as a color display via a multi-color display panel. On the left is the housing of the projector, the projection lens and the image area. The latter light valve can be constituted by an LCD display, an LED panel, and a deformable mirror device, which can selectively change the reflection direction, or other, and function as an object. This object is imaged and magnified on the screen of the right foot bracket. As the source of audio_video information, a vα and a PC 'are shown in the figure. Below the image, the four transmitter arrays are operating as objects in the light system 'and they are immediately imaged above the light valve area on the left. In addition to Λ, the projector can send one or more second data to the mirror to transfer signals from the transmitter-receiver array in the opposite direction, such as' _machine list

第6頁 45000 9 五、發明說明(3) 此等第二發射 合。以此方式 話組織。 圖2顯示在^ 區2 0之中央清 顯示。在陣列 及行驅動器26 接收顯示信號 項目3 2為一 應面板,俾面 項目2 8代表供 改正及消除雜 部被構型為一 分佈至二或多 片上内聯圖案 考慮之非顯示 與圖1成對ti 具體實例。投 鏡及透鏡4 2。 鏡48 , 50將光 5 2 ’ 5 4,5 6 投 有另一透鏡。 6 6,以大箭頭 顯示螢幕上作 機單元可將與螢幕下方之對應之接收機結 1非顯示資料可雙向傳送,如一控制信號對 匕閥面板中一可能之接收機位置。光閥矩陣 楚顯示其單元22之一部份,該部份並以放大 之邊緣,顯示出光閥矩陣區2 0之列驅動器2 4 °項目3 4為三個源信號偵測器,其可為面板 及不同之控制信號。 太陽電池區,以經由接收附近或離散之光供 板之控制部份可與主電源或電池分別作業。 信號調整之電子组件,以調整如箝位,珈瑪 机等。面板之電力調整經由項目3〇。圖2全 單一積體電路面板。以其LCD及偵測器功能 個面板係可行的.為簡單起見,圖中消去晶 。全部構型為前圖之構型。為簡潔計,圖1 資料輸送,此處未加考慮。 二’圖3顯示本發明具有三個輸送顯示面板之 影裝置由劃線顯示並包括光源4〇及其拋物面 鏡44將白光束”摺疊"以得較佳之壓縮。分色 束分成三單色光束R ’G及B,其再由摺鏡 影至個別輪送顯示面板5 8,6 0,6 2,其各備 經由二色向稜鏡6 4,三光束被融成白色光束 表不。此舉使投影機經由投影透鏡系統6 8在 隨後之投影。影像資料源如VCR及代連接至 4 50 00 9 五、發明說明(4) 備有-内部發射機陣歹…之電子板。發 機子系統,每一供一彩色,俾每一顯示面板可接射 之影像及/或控制資科,而不需易受電干 朽、自已 石夕裘置:此發射機可為雷射基準,或Η投影二至其 之影像資料源之連接,可為一光源,如圖!所示。' Μ外 下,投影可自-經由全光聚焦系統之擴散光源 情况 貫及窄束立即光源,如自影相透鏡系統以外之泰2為一迷 料光束之插入機構外,圖3之元件為傳統者。田/除資 自螢幕子系統至投影裝置之反向資料傳送未示於:叶’ 圖4顯示有三反射面板之新穎具體實例。光源μ,。 透鏡68,發射機陣列70及影像資料源與同i投影 離器72與菲利浦稜鏡之結合先將白光束:為相三门。光束分 :別撞擊各別顯示面板74,76,78。此稜鏡接收^,其 陣列之光束以便在與顯示面板共同統合之接 X射機 俾其中之資料可用來調變顯示面板反射。由於,影, 器表面上,光極化之狀態隨圖像資訊而$在顯示 可使用對角線平面,如光自下方進入時作因而 反射光自右側返回之半反射平面。锋广鏡子,及當 稜鏡融合,並在投影透鏡系統68上 ^ :影像_貧料由 像資料源之連接可與圖3所討論 接如圖3所示:: ΐη 各元件均為傳統式。 圖5顯不供反射用之顯示器面板 … 體實例。積體電路本身由較暗段噸1 械連接之此機 陣列共同統合。自電路之電=不,其與右方之接收= 源連接,及由螺釘之機械内聯Page 6 45000 9 V. Description of the invention (3) These second launches are combined. Organize in this way. Figure 2 shows the clear display in the center of area 20. Receive the display signal at the array and line driver 26. Item 3 2 is a response panel, and surface item 2 8 represents non-display and figure 1 for correction and elimination of miscellaneous parts. Paired ti specific examples. Casting mirror and lens 4 2. Mirrors 48, 50 cast light 5 2 '5 4, 5 6 into another lens. 6 6. With a large arrow, the operating unit on the display screen can send the corresponding receiver to the bottom of the screen. Non-display data can be transmitted in both directions, such as a control signal to a possible receiver position in the dagger valve panel. The light valve matrix shows a part of its unit 22, and the part with the enlarged edge shows the column driver 20 of the light valve matrix area 2 4 ° Item 3 4 is three source signal detectors, which can be Panel and different control signals. The solar battery area can be operated separately from the main power supply or the battery by receiving the nearby or discrete light supply board. Signal adjustment electronics for adjustments such as clamps, gamma machines, etc. The power adjustment of the panel passed Item 30. Figure 2 All single integrated circuit panel. With its LCD and detector functions, a panel is possible. For simplicity, the crystal is eliminated in the figure. All configurations are the configurations of the previous figure. For simplicity, the data transfer in Figure 1 is not considered here. Fig. 3 shows that the shadow device of the present invention with three conveying display panels is displayed by scribing and includes a light source 40 and its parabolic mirror 44 to "fold" the white light beam for better compression. The color separation beam is divided into three monochrome colors. The light beams R 'G and B are reflected from the folding mirror to the individual rotating display panels 5 8, 6 0, 6 2, each of which passes through the two-color direction to the light beam 6 4, and the three light beams are fused into a white light beam. This allows the projector to be projected through the projection lens system 6 8 later. The image data sources such as VCR and generation are connected to 4 50 00 9 V. Description of the invention (4) Electronic board with internal transmitter array ... Machine subsystem, each for one color, each display panel can receive the image and / or control resources, without the need to be easily dried, self-exposed: this transmitter can be a laser reference, Or, the connection of projection image 2 to its image data source can be a light source, as shown in the picture! 'Outside, the projection can be from the diffuse light source through the all-light focusing system to a narrow beam of immediate light, such as The Tai 2 other than the self-photographic lens system is outside the insertion mechanism of a material beam. The components are traditional. The reverse data transmission from the screen subsystem to the projection device is not shown in: Ye 'Figure 4 shows a novel specific example of a three-reflective panel. Light source μ, lens 68, transmitter array 70 and The combination of the image data source and the same projector 72 and Phillips will first separate the white light beams into three gates. Beam points: Do n’t hit the respective display panels 74, 76, 78. This frame receives ^, its The light beam of the array can be used to adjust the reflection of the display panel in the X-ray projector integrated with the display panel. Because the surface of the device, the state of light polarization can be used in the display with the image information. Diagonal planes, such as the semi-reflective plane when the light enters from below and the reflected light returns from the right side. The front and wide mirrors, and when fused, are on the projection lens system 68 ^: The connection can be discussed with Figure 3 as shown in Figure 3: ΐη All components are traditional. Figure 5 shows the display panel for reflection ... Examples of integrated circuits. The integrated circuit itself is mechanically connected by the darker section This machine array is unified. = Not the circuit, its source connected to the receiver = right, and the machine by a screw inline

第8頁 4 50 00 9 五 '發明說明(5) 亦示於圖中。光輸送平板8 6形成防漏之密封。如圖所示, 接故機陣列位於防漏保護密封之外。一特別優異之結Z使 接收機陣列位於較中央處並在保護密封之内。以此f 可以更為緊密形狀及降低成本,如圖2之構 " 為簡略起見’圖2令顯示之其他電路特性均未 5 。 不。其可位於保護密封内。 T ^ 像”圖^示1測榮幕之改變之CCD陣列,其位於圖S中之"影 Ϊ之改變二用全螢幕為一或多個控制-,以控制影 器:3;:變或其他。可於⑽之位置放 以上之揭示在二=或類似機構般地操,。通常, 簡潔化。 零件本身可被認為-般技藝常識而予以Page 8 4 50 00 9 Five 'Explanation (5) of the invention is also shown in the figure. The light-transporting plate 86 forms a leak-proof seal. As shown in the figure, the relay array is located outside the leakproof protection seal. A particularly excellent knot Z places the receiver array more centrally and within a protective seal. With this f, the shape can be more compact and the cost can be reduced, as shown in the structure of Figure 2 " For the sake of brevity ' Do not. It can be located inside a protective seal. T ^ "Image" shows the change of the CCD array for measuring the glory screen, which is located in Figure S. "The change of the shadow screen" uses the full screen as one or more controls to control the projector: 3 ;: Or other. You can put the above disclosure in the position of ⑽ to operate in the same way as two or similar institutions. Generally, simplification. The part itself can be considered as general technical knowledge.

Claims (1)

45〇Ο 〇 9 六、申請專利範团 '一·' " 1 ‘一種顯示系統,具有備有影像進入機構之投影器裝 ’ 其了饋送顯示面板機構以產生一或多個光束頻道供隨 $經^光影像機構之投影,該系統尚具有螢幕子系統以接 投影之影像於其上,該系統尚含高頻帶寬光偵感器機 構供立即接收自影像進入機構之投影顯示資料, 其特徵為光偵感器機構與—或多個固態顯示面板共同統 合’以便在該投影機構内之—或多個光束頻道接收投影顯 示資料》 ,2^如申請專利範圍第1項之系統,其中該光偵感器機構 被安排與光發射機機構合作,亦安排在該投影器機構中。 、3. ^申請專利範圍第丨項之系統,其中該光偵感器機構 並被安排接收控制信號,以控制該顯示面板裝置。 4·如申請專利範圍第1項之系統,其中該螢幕子系統具 有遙控無線發射機機構,以饋送該光影像機構外部之偵感 器機構》 5.如申清專利範圍第1項之系統’其中該螢幕子系統具 有配置在螢幕平面中之該遙控無線發射機機構。 6·如申請專利範圍第1項之系統,其t該螢幕子系統有 一影像及/或控制資料發射機機構β 7 ·如申请專利範圍第1項之系統,其中該顯示面板裝置 備有電力太陽電池機構。 8‘如申請專利範圍第1項之系統’其中該顯示面板裝置 備有信號ψ整電路。 9.如申請專利範圍第1項之系統,其中該偵感器機構與45〇〇 〇6. Patent application group 'a ·' " 1 'A display system with a projector equipped with an image entry mechanism' It feeds the display panel mechanism to generate one or more beam channels for subsequent The projection of the light imaging mechanism, the system also has a screen subsystem to receive the projected image on it, the system also contains a high-frequency bandwidth light sensor mechanism for immediate reception of the projection display data from the image entering the mechanism, which The feature is that the light sensor mechanism is integrated with—or a plurality of solid-state display panels ’in order to receive projection display data in one or more of the beam channels in the projection mechanism.” 2 ^ The system of item 1 in the scope of patent application, where The light detector mechanism is arranged in cooperation with the light transmitter mechanism and is also arranged in the projector mechanism. 3. The system of item 丨 in the scope of patent application, wherein the light sensor mechanism is arranged to receive a control signal to control the display panel device. 4. If the system of item 1 of the patent scope is applied, wherein the screen subsystem has a remote control wireless transmitter mechanism to feed the sensor mechanism outside the optical imaging mechanism "5. If the system of item 1 of the patent scope is declared The screen subsystem has the remote wireless transmitter mechanism arranged in the screen plane. 6. If the system of the scope of patent application is applied for, the screen subsystem has an image and / or control data transmitter mechanism β 7 · For the system of the scope of patent application, the display panel device is equipped with electric sun Battery body. 8 'The system as claimed in item 1 of the patent application range', wherein the display panel device is provided with a signal ψ entire circuit. 9. The system according to item 1 of the scope of patent application, wherein the detector mechanism and the O:\61\61090.PTD 第10頁 系統中生 構以產生 影,及該 影像進入 板共同統 收投影顯 感器機構 〇 感器機構 面板機構 面板機構 450009 六、申請專利範圍 一或多個固態顯示面板在保護也封中共同統合。 i 〇. —種投影裝置,供於申請專利範圍第1項之 產光束,備有影像進入機構’供饋送顯示面板機 一或多個光束頻道以備經由光影像機構隨後之投 裝置尚含高頻帶寬光偵感器機構以立即接收自該 機構之顯示資料, μ 其特光福感器機構與一或多 合,以便在投影器機;^ t ^ 囬 示資料。 气傅τ之或多個光束頻道接 1 1.如申請專利範蘭 與光發射機機構合作,I j之裝置,其中該光偵 12.如申請專利㉟圍’第並9::2校影機機構中 尚被安排接收控制作^項之裝置,其中該光偵 1 3.如申請專利範^以控制該顯示面板機構。 備有電力太陽電池機構^項之裝置,其中該顯示 14.如申請專利範固 備有信號調整電路。 哨&装置’其中該顯不O: \ 61 \ 61090.PTD Page 10 The system generates a shadow in the system, and the image enters the board to collectively receive the projection sensor mechanism. The sensor mechanism panel mechanism panel mechanism 450009 6. Application scope for one or more patents The solid-state display panel is integrated in protection and sealing. i 〇. — a projection device for the production of light beams in the scope of patent application No. 1 with an image entry mechanism 'for feeding one or more beam channels of the display panel machine for subsequent investment device through the optical imaging mechanism The frequency-band optical sensor mechanism can immediately receive the display data from the mechanism, μ its special light sensor mechanism and one or more, in order to display the data in the projector; ^ t ^. Qi Fu τ or multiple beam channels are connected 1 1. If the patent application Fan Lan cooperates with the optical transmitter mechanism, I j device, where the light detection 12. If the patent application is applied, 'Band 9 :: 2 school film The device is still arranged to receive the control device as item ^, where the light detection device is used to control the display panel mechanism. Equipped with electric solar cell device ^ item, where the display 14. If a patent application is applied, a signal adjustment circuit is provided. Whistle & device ’
TW088118781A 1998-09-18 1999-10-29 Projection display system and device with high bandwidth wireless communication for projection display data TW450009B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98203145 1998-09-18

Publications (1)

Publication Number Publication Date
TW450009B true TW450009B (en) 2001-08-11

Family

ID=8234135

Family Applications (1)

Application Number Title Priority Date Filing Date
TW088118781A TW450009B (en) 1998-09-18 1999-10-29 Projection display system and device with high bandwidth wireless communication for projection display data

Country Status (5)

Country Link
EP (1) EP1046305A1 (en)
JP (1) JP2002525695A (en)
KR (1) KR20010032185A (en)
TW (1) TW450009B (en)
WO (1) WO2000018140A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6104802A (en) 1997-02-10 2000-08-15 Genesys Telecommunications Laboratories, Inc. In-band signaling for routing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59009699D1 (en) * 1990-11-06 1995-10-26 Itt Ind Gmbh Deutsche Projection television system.

Also Published As

Publication number Publication date
WO2000018140A1 (en) 2000-03-30
JP2002525695A (en) 2002-08-13
EP1046305A1 (en) 2000-10-25
KR20010032185A (en) 2001-04-16

Similar Documents

Publication Publication Date Title
US5865521A (en) Projection-type display apparatus
CN101304539B (en) Optical equipment, image indicator and colour changing method
US5451103A (en) Projector system
CN100483248C (en) Optical device and projector comprising it
ATE49496T1 (en) COLOR IMAGE PROJECTION SYSTEM.
US6530663B2 (en) Projecting device for displaying electrical images
US6905213B2 (en) Projection apparatus and projection-type image display apparatus
US7611249B2 (en) Projector
TW450009B (en) Projection display system and device with high bandwidth wireless communication for projection display data
US10185209B2 (en) Image projection apparatus and illumination optical system
US8132923B2 (en) Cooling device and image projection apparatus having the same
US9935381B2 (en) Connector, wireless communication module, wireless communication device, and electronic apparatus
US20060187417A1 (en) Projector
KR20020043665A (en) Optical System Of Liquid Crystal Projector
US7794089B2 (en) Liquid crystal projection system
CN100460997C (en) Projector
CN107111217A (en) Projection display unit
WO2011035551A1 (en) Laser television
US6788377B1 (en) Liquid crystal device and projector using the same
US6805451B1 (en) Horizontal/vertical dual-mode LCD projector
WO2015045133A1 (en) Projector unit
JP4806912B2 (en) Image projection device
JPH10123622A (en) Amplifying and light-emitting screen
JP2009288662A (en) Image projection apparatus
JP2012118173A (en) Projector

Legal Events

Date Code Title Description
GD4A Issue of patent certificate for granted invention patent
MM4A Annulment or lapse of patent due to non-payment of fees