TWI250374B - Method for electronic adjustment of the geometry in a videoprojector used in back projection and a videoprojector utilizing the method thereof - Google Patents

Abstract

Method and videoprojector using such a method for adjusting the geometry of an image produced starting from a digital video signal projected on a screen by a videoprojector, in particular used in back projection, comprising: (a) entering a mode provided for electronic adjustment of the geometry of the image; (b) controlling, through control elements associated to the videoprojector, the electronic adjustment means that operate distortions on the digital video signal to be projected; (c) bringing each apex of the image to coincide with a respective apex of the screen by means of the distortions operated by said electronic adjustment means on the digital video signal.

Description

1250374 Case number 92134583

V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) [Technical Field] The present invention relates to a method for adjusting an image of a video, and a method for adjusting the image and the image projector using the same method. Shirt machine, special 柹 柹 影像 柹 柹 反向 反向 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 〈 X and the use of [prior art] mechanical miniaturization and semiconductor-specific technology of the π Feng ^ ! type electromechanical system manufacturing, this small electromechanical Li: v use has been led, Shi α 仗 日 日 日) and LCoS (reflection Liquid-based day-to-day projection display) is widely used in / 丨 4 4 ^ ^ 士 ^ ^ Ώ 用 in small and compact image projectors to ensure high-quality images. The image projector can be used in a forward projection or back projection, for example, by a single image projector or so-called projection display wall, heart (vi deowa 1 1, system) A large home screen (max i-screens) consisting of several back projectors that are horizontally and vertically formed with a 4 image wall (and thus a very large screen). In a reverse projector, images are projected onto a panel (eg dmd) On the component, a screen composed of an optical system and directly or by mirror transmission to a Fresnel lens. In the forward technique, the user and the light source are all on the same side facing the screen; in the back projection, the user and the light source are on the opposite side. When the image formed on the panel is displayed on the screen, it is usually affected by geometric distortions, such as: green ring

INVENT20031202PI34.ptc Rotation of vertical and/or horizontal axes 'Vertical and/or horizontal irregularities::

1250374 ---- Case No. Q2134583 V. Description of the invention (2) Unusual center point on the edge screen and the mirror orientation of the image size is too large or too small, the image projector j tolerance (tolerance), the aforementioned shirt rectangle The sides and vertices did not get the correct image orientation, and the image was adjusted, that is, three kinds of three-way two kinds of screens around the X, Y, and Z axes respectively displayed on the opposite side of the image, and the adjustment was made by one person manually at the rear of the machine. 'Another person directly looks at the firefly'. If there are more than four images, it will be a considerable complex. These distortions are basically due to the different manufacturing of the positioning device, the alignment of the lens panel of the screen and related fixtures, etc. The most obvious effect of distortion is due to the matching of the screen rectangle. In order to be able to perform on the screen of the reverse projector, the projector must be able to freely perform at least six orthogonal coordinate axes X, Y, Z axis movement and i rotation; since the image projector is positioned in the fire image, it is necessary to at least two Personal image projectors, such as locking or loosening the screw screen, give useful adjustment instructions. Such a projector (such as an image wall) needs to be adjusted for a complicated operation, which takes time and money. ^ According to Italian patent No. IT 1 3 0 88 64, the aforementioned drawbacks can be solved by a device device having six independent mechanical adjustments that are activated by a motor and operated remotely, with a single installer on the screen Before adjusting the image on the screen, this mechanical adjustment-based system still has some shortcomings worthy of consideration: such as high cost and the weight of the support base with three movable plates. Recently, some companies have proposed an adjustment system to process images by electronic means based on integrated circuits, such as LEXEGANG ELECTRONICS's 1^111 (1 and 3[:(^(^0? 3^1 of Ding 1乂; in order to obtain satisfactory geometric correction of the image on the screen, these systems need to count

INVENT20031202PI34.ptc Page 7 1250374

-t^J2m583 Description of invention (3) , :: In Ξ : ; ί Adjust each other's dependencies 'There must be repeated adjustments - owe [The content of the adjustment requires a considerable amount of complicated operations: number - human law, i :: ΐ ί is intended to provide the shortcomings of the electronic geometry of the geometry and to ensure that the image on the screen is caught quickly, and that the queen can be accurately positioned in the adjustment operation, and the other is the same as the present invention - Γ Γ 及 相当 及 及 及 及 及 及 及 及 相当 相当 相当 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投 投The signal starts, #includes the following steps: the digital visual geometry of the screen is electronically adjusted. · It is controlled by the input as the shadow control electronic adjustment hand: r; combined control element: deformation on the signal; finally According to the invention, the deformation is performed in each of the vertices of the image. The curtain is used in the reverse projection of the doped earth according to the invention: the adjustment of the projected image is to make the screen: cast: or alias, but Electronic processing of image digital signals and busy every ^ The parameters obtained by the appropriate steps in the method are achieved. According to the achievable ability, the number of buttons is monitored based on the implemented steps, and the operator is not required to have special adjustment methods of the present invention. The standard provided by the operating device is simple, fast deformation compensation or specific experience.

1250374 -SS_92134583 V. Description of invention (4) Method of implementation 曰 Correction history ^ The method of electronic adjustment of image geometry of the present invention, referring to the first picture, the image projection: the machine (not shown in the figure) is projected on the rectangular screen (丨) The image, because the geometrically true 'projected image (2) is distorted on the screen (1), the vertex A, B, c, D of the deformed image (2) corresponds to the screen (1) Vertices A, B, C, and D are inconsistent. The adjustment method according to the present invention provides the following steps: First, a _digital video signal is required. ^ Then 'Enter the geometry adjustment mode of the image projector according to the general procedure', for example, press a specific button on the remote monitor (rem〇te c〇ntrol) or call the directory on the screen and move the cursor to view the directory until it arrives. "Geometry adjustment" project. Press a specific button on the remote monitor of the image projector, for example, with the symbol "+" or the text "go" (go 0Π) to start the adjustment mode; a luminous indicator (3), one or more letters, A digital or graphical symbol consisting of a vertex near one of the images (2) (such as vertex A' in the first image) indicating where the operator should start the correction. Perform the adjustment by activating the direction buttons "High, Low, Right, Left" provided on the image projector or remote monitoring to maximize the vertex A of the image (2) and the corresponding vertex A of the screen (1). Coincident. As described above, since the video signal is digitized by the pre-distorted image frame, the vertex A' and the vertex A may coincide. Press the 『+』key again, the illuminating mark (3) will move to the other corner of the image (2), such as the vertex B, and the above direction button will be activated to make the vertex B coincide with the vertex B.

INVENT2003l202PI34.ptc Page 9 1250374 Case No. 92134583 千五、发明说明(5) Similarly, this adjustment can be obtained by the above-mentioned distortion used in the electronic adjustment means on the digital image to be projected. It is important to note how to make independent adjustments and only adjust the image once at each vertex; that is, in a single operation cycle, the vertices must be corrected according to the indication of the illuminated indication (3) preset command. In the event that the circuit used to deform the digital image will be able to perform the subsequent deformation without changing the previous deformation. Once the four vertices of A, B, C, and D are adjusted, the relevant information of the adjustment, that is, processing the image (2) and adapting it to the parameters of the screen (1), will be stored in the image projector. In a non-volatile memory (v^atile Memory), this data will be two after each startup. The material storage action can be automatically generated when the geometry adjustment is exited. 1 necessary adjustments, images formed on the screen (1) (7) library ΪΪΪϋ h # effect surface area is small; in fact, image (2) # screen (1) the same size, image (2) content is adjacent to the large image It fell outside the curtain of honor (1) and was lost. The same acuity may occur when w曰 is at the extended center point and rotated. As the first picture is near the vertices C, and D, the slash area is adjacent to the ', ', (1) part, and falls outside the screen (1) so that the operator can display the appropriate image for the inside of the image projector (4): The finer adjustment is easier. To achieve this, you can insert straight lines a, b, c, and d (see Figure 2), image (2) four straight lines a, b, C, d Obviously, it can also be combined with the = line area ---:--- into a quadrilateral.

INVENT2003l202Pl34.ptc Page 10 C' ’ Start the button to increase the line (a) falls outside the screen, to adjust the vertices

Use the adjustment of the image (2) that is formed on the panel, see the fourth 1250374 case number 92134583 5. The invention description (6) ^ two V.概要, f) is a schematic diagram, so that the subsequent / projection is free of distortion; the above adjustment can be obtained through the digital image of the processing panel, Rong l ^μ, _ s, as described in the middle of the makeup The program, /, 検 = and the DMD technology composed of pixels straight line together. Use i:: Shibuya is more concise, the number of reference numbers projected by the image processing on the panel layer. Brother, - Figure... (1) The sound of the image (2), vertical: 敫ϊ 敫ϊ Ϊ Define the starting vertex of the adjustment 'in the fourth picture a), let R: % HA, start, so in the fourth picture a) The vertices of A, and 曰 represent the images to be adjusted on the screen, while the vertices A, B, C, Γι u ^ J , γν points A, B, C, D, the screen TSD represents the correctness of the desired The image, that is, the top vertex A, pays the same as the vertex A. The error is caused by the movement of the entire image B, C, D, and the equal volume of the mouth ^, that is, the positioning of the vertex A will cause the vertex B, c, r, to move; to make the adjustment easier, these vertices A, has been selected as a private part, as explained later, is partially compensated. Since the vertices ","; then, all adjustments #% after the fourth figure b) to g) are generated in such a way that the position of the vertex A, remains unchanged. The bucket must be %, the fourth diagram b ) represents the horizontal steering, which keeps the positions of the vertices A and 6 in abundance and horizontally moves the vertices C ' and D, and the sides formed between them, this adjustment can be used to move the water, forming the pixels of the image: from the C, D, on the side of the "image, & prime", the maximum line is changed to the pixel arranged on the side of AB as the 〇 move. The fourth figure c) represents the vertical turn, which makes the vertices A and D Position is maintained and vertically moved ^ point B, and c, between the sides, this adjustment can be moved by =

INVENT20031202PI34.ptc Page 11 1250374 Case No. 92134583 V. Invention description (7) The monthly correction gold is formed directly into the pixel of the image. The pixel is changed from the pixel of the ^ to the maximum line. # A n /丨I恻远致致仃的进行进行#. The pixels that are arranged in the upper direction of the A-D side are the four-dimensional graph d), and the horizontal perspective in which the vertices A, R, and η are only moved by 4 ft. This kind of 敫 、, 々 亚 亚 顶点 顶点 C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C And the technique of reducing the skill is known in digital, so the details are not repeated here. ...虮 in the field of processing, the fourth figure e) stands for vertical perspective, 盥B, D remain unchanged and moves vertically, owing: perspective is similar, vertex A, lower line increases in each line (ie insert In $example, from top to top: with the side AD-induced line ^ change) /, the prime ^ remove (ie, lower) line is subject to the largest pixel change. U-edge B-C'-induced-fourth image f) represents the change in the horizontal size of the image, the parent column is increased (ie inserted for expansion) and the error is reduced by the same number of pixels in the image, but the hold-solid ^ f (ie, for the reduction, the side between A and D is not moved to. 疋 ε is the first column and thus the vertices last 'fourth image g) represents each line of the image vertical image is increased (ie, for the expansion to insert the intersection, is borrowed The same number of pixels are reduced by zooming out, but the top 々 3 is reduced (ie, to start, so the positions of vertices A and B will remain unchanged as described above, fourth figure b), c), d), ^ # 4皮it# Μ ^The initial vertex of the adjustment is adjusted to the position of 』), /), so that the 1 ^, the load does not change. Page 12 INVENT20031202PI34.pt (1250374 Case No. 92134583 V. Inventive Note (8) Obviously choose different starting vertices, the fourth figure b should be changed appropriately) C), d), e), f) 1) Adjust to avoid the selected vertices from interacting and interfering with each other. ",, £ position as the first step of the adjustment, by starting the movement as shown in the fourth figure a)

曰 a 7 No / Comment Straight muscle double 7 as shown in Figure 4) is loose to its correct position A, but as mentioned earlier, this adjustment must be followed by a vertex. The vertex B adjacent to the vertex A is moved in the horizontal direction by the vertical shift of the fourth graph c) and the horizontal shift of the fourth map f) to bring the vertex B to the position of B. In this way, the adjustment of the vertex B' does not cause the vertices A and 〇 to move, but moves the vertices. Similarly, the vertex D adjacent to the vertex A can be vertically moved by the horizontal sugar of the fourth figure b) and vertically moved by the vertical magnification of the fourth figure g) to bring it to the position of D. The adjustment of the vertex d does not cause any movement of the vertex b, and the vertex C' is moved. Finally, the horizontal perspective of the fourth figure d) is used for the vertical movement of the water and the vertical perspective of the fourth figure e) is moved vertically, and will be brought to the position of C with the start. The adjustment of the vertex c will not make any noise to the other top U. Therefore, in accordance with: 1) pre-selected vertices, such as A in the embodiment; 2) vertices B adjacent to A', and D,; 3) and A, opposite vertices. When the order of the vertices is adjusted, the single vertices are combined.

Before adjusting the blind li / six π θ ~ I ten > top", έ position, you can adjust the image geometry by performing a single Hu effect of each vertex. σ 正ϋ, to adjust the vertices When making the previous III 丨丨丨丨丨— ----------

The adjustment affects the subsequent movement of the vertices to be adjusted [this is the case; for: 1250374 Case No. 92134583 月 Amendment V. Invention Description (9) The adjusted vertices remain basically unchanged. In particular, when the starting vertex A' is moved, all the vertices B', C', D' will undergo almost the same amount of movement as applied to the vertex A', and thus almost remain stationary, vertex B The 'adjustment' produces an equal amount of movement opposite the vertex C'; this also applies to the adjustment of the vertex D'. In fact, when performing the compensation, the operator will only see the vertices in the adjustment, which further simplifies the operator's work. It is apparent that many variations of the method of the present invention can be made using the method of the present invention without departing from the novel principles of the present invention. For example, the correction of the apex in the third figure can be obtained by the small quadrilateral (4), and in the small quadrilateral (4) the important angle is indicated by the illuminating reference point (5). If the small quadrilateral (4) is placed in the center of the image (2), the vertex correction indication will not fall outside the screen, which means that the indication will always be in the visible area, making adjustment easier. Correction instructions for vertices can also be represented by text, such as "upper right corner", "lower left corner", and so on. The above adjustment method can also be performed in an image projector that is not used for back projection. The simple method employed by the present invention is in fact also advantageous for use in image projectors having a forward structure.

INVENT20031202PI34.ptc Page 14 1250374 Case No. 92134583 Yearly correction diagram Simple description First diagram: A schematic diagram of adjusting the image geometry projected on the screen according to the image geometric electronic adjustment method of the present invention. Second diagram: Image geometry electron according to the present invention FIG. 3 is a schematic view of a further embodiment of an image geometric electronic adjustment method according to the present invention. FIG. 4 is a schematic diagram showing the possible intermediate steps of the image geometric electronic adjustment method of the present invention. : [Invention] (2) Imagery (4) Small quadrilateral (A, B, C, D) screen vertex (1) Screen (3) Illuminated sign (5) Illumination reference point (A', B', C', D') image vertex (a, b, c, d) straight line

INVENT20031202PI34.ptc Page 15

Claims (1)

1250374 1_No. 92134583 VI. Patent Application 1 · A "projection machine" is used especially for the reverse digital video signal, 1) enters the supply as a shadow 2) via the image projector segment, the electronic adjustment means The deformation of the system; 3) by the digital video letterer image - each vertex and 2 · according to the patent application scope law, which is characterized by each of the top memory, and used in the image 3 · according to the patent application scope law The feature is that it is deformed by digits, and each vertex and the corresponding vertex of the screen according to a preset order. 4 According to the patent application scope method, the image is characterized by an image neutron symbol. 5 · According to the patent application scope method, it is characterized by an image.曰 '二'?·:; :r . / V., ·, how to adjust the image projector projected onto the screen from an image projection projection. The method includes the following steps: a mode like geometric electronic adjustment; The combined control element controls the electronic adjustment hand to operate the projected digital video signal on the first point of the projector The distortion trajectories operated by the video signal adjustment means coincide. The geometric adjustment parameters of the projected image are stored in each start after the non-volatile period. The vertices used in the electronic adjustment means on the geometric adjustment square of the projection image are only operated once, so that the geometric adjustment angle of the adjusted projection image of each of the first items of the image is composed of one or more letters or numbers of items 1 The adjustment angle of the geometric adjustment side of the projected image is one or more graphic symbols. 6. The geometrical adjustment method of the projected image according to the fourth or fifth aspect of the patent application is characterized in that the symbol is located near the vertex to be adjusted. °° positive INVENT20031202PI34_2.ptc 1250374 Case No. 92134583 月 修正 Amendment VI. Patent application scope 7. The geometric adjustment method of the projected image according to item 1 of the patent application scope is characterized in that the adjustment means includes four indications. 8. The geometric adjustment method of the projected image according to claim 7 of the patent application, characterized in that the indication is transmitted to the image projector via a remote control mode. 9. The geometric adjustment method of the projected image according to the first application of the patent scope is characterized in that the image contains a signal generated inside the image projector to make adjustment easier. 1 . The geometric adjustment method of the projected image according to claim 9 of the patent application, characterized in that the signal is composed of a straight line parallel to the side of the image. 1 1. The geometric adjustment method of the projected image according to the first application of the patent scope is characterized in that the image projector uses DMD (Digital Micromirror Element) technology. 1 2. The geometric adjustment method of the projected image according to the first application of the patent scope is characterized in that the image projector uses an LCD (Liquid Crystal Display) technology. 1 3. The geometric adjustment method of the projected image according to the first application of the patent scope is characterized in that the image projector uses the LC〇S (reflective liquid crystal projection display) technology. 1 4. A method of geometrically adjusting a projected image according to claim 1 of the patent application, characterized in that the adjusted vertex is indicated by a letter, a number or an image signal located near the center of the image. 1 5. An image projector, which implements patent range 1 to INVENT20031202PI34-2.ptc Page 17 1250374 INVENT20031202PI34-2.ptc Page 18