JP5617310B2 - Projection apparatus, projection method, and program - Google Patents

Description

  The present invention relates to a projection apparatus, a projection method, and a program for inputting and projecting various image signals.

  In general, in a data projector, as means for discriminating the screen size of an input analog image signal, including the effective period and blanking period of the video, the time interval of the horizontal synchronization signal and the horizontal synchronization signal between the vertical synchronization signals Number (number of lines).

  FIG. 5 is a diagram for explaining the determination of the screen size for one frame of non-interlaced images. Compared to the entire area indicated by the total horizontal time and the total number of vertical lines shown in FIG. 5A, an area effective for displaying (projecting) an image indicated by the number of horizontal effective pixels and the number of vertical effective pixels is It is reduced by the area corresponding to the blanking period.

  As shown in FIG. 5B, an image having an effective pixel number of 1,400 pixels in width × 1,050 pixels in height, which is also called SXGA + (Super eXtended Graphics Array plus) size, is displayed at a frequency of 60 [Hz]. In this case, the horizontal total time is 15310 [nsec] (frequency is 65.32 [kHz]), and the total number of vertical lines is 1089 [lines].

  On the other hand, as shown in FIG. 5C, an image having an effective number of pixels of 1,680 pixels in width × 1,050 pixels in height, which is also called WSXGA + (Wide Super Extended Graphics Array plus) size, is 60 Hz. In the case of display at a frequency of 1, the horizontal total time is 15316 [n seconds] (frequency is 65.29 [kHz]), and the total number of vertical lines is 1089 [lines].

  As described above, when any one of the analog image signals having the same resolution of the total horizontal time and the total number of vertical lines is input, there is a possibility that the screen size is erroneously determined on the data projector side.

  In recent years, there are many variations in the screen aspect ratio and there are many combinations of screen sizes. As described above, there is an increased possibility of erroneous determination when determining the screen size based on the total horizontal time and the total number of vertical lines. ing.

  When the screen size is erroneously determined, the data projector correctly projects the image, for example, by projecting an image that originally represents a perfect circle as an ellipse, or by projecting an image whose position is shifted in line units. I can't do that.

In order to avoid such a situation, conventionally, the screen size to be prioritized by the user is selected in advance in the menu setting of the projector.
However, for example, the standard name indicating the screen size such as “SXGA +” and “WSXGA +” or the screen size notation by the number of pixels such as “1,400 pixels × 1,050 pixels” and “1,680 pixels × 1,050 pixels” It is difficult for a user unaccustomed to handling a personal computer or the like to cause a selection error.

  Also in the patent literature, the frequency of the synchronizing signal of the video signal is examined, the resolution of the video signal is determined from the frequency, and the video represented by the video signal is enlarged / reduced, so that the resolution of the video signal can be adjusted. It is possible to see the technology that has been converted to match the resolution and displayed on the display device. (For example, Patent Document 1)

JP 2007-058234 A

  In the above-mentioned patent document, for example, in FIG. 4 of the patent document, the horizontal resolution frequency is “24.8 [kHz]”, “37.5 [kHz]”, “31.5 [kHz]”, and so on. “The frequency is examined at the first decimal place of the order. On the other hand, if the two screen resolutions shown in FIG. 5B and FIG. 5C are expressed by the first decimal place in the “kHz” order, both are “65.3 [kHz]”.

  As described above, the techniques described in the above-mentioned patent documents do not assume that screen sizes having very similar frequencies are discriminated, and it is difficult to reliably avoid erroneous discrimination.

  In general, including the above-mentioned patent documents, it is often referred to as “(screen) resolution”. However, the resolution is originally the number of pixels per unit length (usually inches). Therefore, in the present invention, it is referred to as “screen size”.

  In addition, in order to simplify the description, one pixel (pixel) is assumed to be a square pixel having a vertical / horizontal ratio of 1: 1, and the ratio of the vertical pixel number to the horizontal pixel number becomes the screen aspect ratio as it is. And

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a projection device, a projection method, and a program capable of accurately setting the screen size of an analog image signal. It is in.

According to the first aspect of the present invention, there is provided an input means for inputting an image signal, a scaling processing means for generating image data having a preset screen size using the image signal input by the input means, and the scaling processing means. A projection unit for forming and projecting a light image from the image data obtained in step (b), a measurement unit for measuring the screen size of the image signal input by the input unit, and a screen size corresponding to the measurement result of the measurement unit. Candidate storage means for grouping and storing a plurality of candidates, and referring to the candidate storage means based on the measurement result of the measurement means, input by the input means based on each of the plurality of candidates constituting the corresponding group and the reduced sample image using the image signal is generated by the scaling processing unit, a plurality of reduced sample images generated by the projection means A sample image projection means for projecting a multi-screen against Ri, a selection receiving means one from an image obtained by projecting the multi-screen is for accepting from being selected by the projection means by the sample image projection means, by the selection receiving means A setting unit configured to generate image data by setting a screen size candidate corresponding to the received selection result image in the scaling processing unit;

  According to a second aspect of the present invention, in the first aspect of the present invention, the candidate storage means groups and stores a plurality of candidates including a screen size and frequency information.

  According to a third aspect of the present invention, in the first aspect of the invention, the sample image projecting means includes the plurality of candidates on a screen obtained by dividing one screen into vertical n × horizontal n (n: a natural number of 2 or more). A multi-screen to which a reduced sample image is assigned is generated by the scaling processing means and projected by the projection means.

According to a fourth aspect of the present invention, an input unit for inputting an image signal, a scaling processing unit for generating image data of a preset screen size using the image signal input by the input unit, and the scaling processing unit A projection method in a projection apparatus including a projection unit that forms and projects a light image from the obtained image data, the measurement step for measuring the screen size of the image signal input by the input unit, and the measurement step The candidate information obtained by grouping a plurality of screen size candidates corresponding to the measurement results in the memory is stored in advance in the memory, and the candidate information is referred to by the measurement results in the measurement process, and the plurality of candidates constituting the corresponding group based on the respective candidate, the reduced sample image using the image signal input by the input unit is generated by the scaling processing unit, it is generated by the projection unit A sample image projection step for projecting a multi-screen by assigning a plurality of reduced sample images, a selection acceptance step of accepting the one from an image obtained by projecting the multi-screen by the projection unit in the sample image projection step is selected, And a setting step for generating image data by setting a screen size candidate corresponding to the image of the selection result received in the selection receiving step in the scaling processing unit .

According to a fifth aspect of the present invention, an input unit for inputting an image signal, a scaling processing unit for generating image data of a preset screen size using the image signal input by the input unit, and the scaling processing unit A program executed by a computer built in a projection apparatus including a projection unit that forms and projects a light image from the obtained image data, and measures the screen size of an image signal input from the input unit. Measuring means, candidate storage means for grouping and storing a plurality of screen size candidates corresponding to the measurement results in the measurement means, referring to the candidate storage means by the measurement results in the measurement means, Based on each of a plurality of candidates, a reduced sample image using the image signal input by the input unit is converted by the scaling processing unit. Is generated, the sample image projection means for projecting a multi-screen by assigning a plurality of reduced sample images generated by the projection unit, one from the image which had been projected as multi-screen by the projection unit in the sample image projection means is selected And a selection accepting unit that accepts image data, and a setting unit that sets image size candidates corresponding to the image of the selection result accepted by the selection accepting unit in the scaling processing unit.

  According to the present invention, it is possible to accurately set the screen size of an analog image signal.

The block diagram which shows the structure of the functional circuit of the data projector apparatus which concerns on one embodiment of this invention. 6 is a flowchart showing processing details of resolution setting at the time of image signal input according to the embodiment. The figure which shows the group of the screen size of several candidates with which the horizontal total time and the number of vertical total lines approximated previously memorize | stored in the program memory which concerns on the same embodiment. The figure which shows the state which formed and projected the 4 division | segmentation screen by the candidate of three screen sizes which concern on the embodiment. The figure explaining the discrimination method of the resolution with respect to an image.

  An embodiment in which the present invention is applied to a data projector apparatus of DLP (Digital Light Processing) (registered trademark) system will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a functional circuit of a data projector device 10 according to the present embodiment.
The data projector device 10 includes an A / D conversion unit 11, a video decoder 12, and a USB (Universal Serial Bus) interface (I / F) 13 as input units.

  The A / D converter 11 digitizes an analog RGB signal input from a personal computer or the like via a D-sub15 type RGB input terminal.

  The video decoder 12 digitizes an analog composite video signal input via, for example, a pin jack (RCA) type video input terminal after Y / C separation.

  The USB interface 13 inputs streaming data of a moving image input by isochronous transfer from a USB host device such as a personal computer connected via a USB cable (not shown) via a USB-B terminal, for example.

  The image signal input from any of the input units 11 to 13 is sent to the projection image processing unit 14 via the system bus SB.

  The projection image processing unit 14 unifies the input image signal into an image signal of a predetermined format suitable for projection, writes the image signal to the display video memory 15 as appropriate, and then writes the written image signal from the video memory 15. Read out and send to the projection image drive unit 16.

  At this time, data such as symbols indicating various operation states for OSD (On Screen Display) are also superimposed on the image signal by the video memory 15 by the projection image processing unit 14 as necessary, and the processed image signal is read out. To the projection image drive unit 16.

  The projection image driving unit 16 multiplies a frame rate according to a predetermined format, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations, in accordance with the transmitted image signal. The micromirror element 17 that is a spatial light modulation element (SLM) is driven to display by high-speed time-division driving.

  The micromirror element 17 individually performs high-speed on / off operations on each tilt angle of a plurality of micromirrors arranged in an array, for example, WXGA (Wide eXtended Graphics Array) (1280 horizontal pixels × 800 vertical pixels). By performing the display operation, an optical image is formed by the reflected light.

  On the other hand, R, G, B primary color lights are emitted cyclically from the light source unit 18 in a time division manner. The primary color light from the light source unit 18 is totally reflected by the mirror 19 and applied to the micromirror element 17.

  Then, an optical image is formed by the reflected light from the micromirror element 17, and the formed optical image is projected and displayed on a screen (not shown) to be projected via the projection lens unit 20.

  The light source unit 18 includes a light emitting diode (hereinafter referred to as “R-LED”) 21 that emits red (R) light, a light emitting diode (hereinafter referred to as “G-LED”) 22 that emits green (G) light, and blue ( B) It has a light emitting diode (hereinafter referred to as “B-LED”) 23 that emits light.

  The red light emitted from the R-LED 21 passes through the dichroic mirror 24, is converted into a luminous flux having a substantially uniform luminance distribution by the integrator 25, and is then sent to the mirror 19.

  The green light emitted from the G-LED 22 is reflected by the dichroic mirror 26, then reflected by the dichroic mirror 24, and sent to the mirror 19 through the integrator 25.

The blue light emitted from the B-LED 23 is reflected by the mirror 27, passes through the dichroic mirror 26, is then reflected by the dichroic mirror 24, and is sent to the mirror 19 through the integrator 25.
The dichroic mirror 24 transmits red light while reflecting green light and blue light. The dichroic mirror 26 reflects green light while transmitting blue light.

  The projection light driving unit 28 controls the light emission timing of each of the LEDs 21 to 23 of the light source unit 18 and the waveform of the driving signal. The projection light drive unit 28 controls the light emission operations of the LEDs 21 to 23 according to the timing of the image data given from the projection image drive unit 16 and the control of the CPU 29 described later.

  The CPU 29 controls all the operations of the above circuits. The CPU 29 is directly connected to the main memory 30 and the program memory 31. The main memory 30 is composed of a DRAM and functions as a work memory for the CPU 29. The program memory 31 is composed of an electrically rewritable nonvolatile memory, and stores an operation program executed by the CPU 29, various fixed data, screen size determination table data described later, and the like.

  The CPU 29 reads out the operation program data and the like stored in the program memory 31 and develops and stores the operation program data in the main memory 30 and then executes the program to control the data projector device 10 in an integrated manner. To do.

The CPU 29 executes various projection operations in accordance with key operation signals from the operation / display unit 32.
The operation / display unit 32 includes a key operation unit and an indicator unit provided in the main body of the data projector device 10, and a laser light receiving unit that receives infrared light from a remote controller (not shown) dedicated to the data projector device 10. . The operation / display unit 32 outputs to the CPU 29 a key operation signal based on a key operated by the user with the key operation unit of the main body or the remote controller.

  Specifically, the power key, input switch key, focus up / down key, zoom up / down key, menu key, cursor ("↑" "↓") “←” “→”) key, set key, cancel key and the like.

  The CPU 29 is further connected to the sound processing unit 33 via the system bus SB. The sound processing unit 33 includes a sound source circuit such as a PCM sound source, converts the sound data given during the projection operation into an analog signal, drives the speaker unit 34 to emit a loud sound, or generates a beep sound or the like if necessary.

Next, the operation of the above embodiment will be described.
As described above, the projection image processing unit 14 creates an image to be displayed on the micromirror element 17 using the video memory 15, and the projection image driving unit 16 displays the created image on the micromirror element 17. The projection light drive unit 28 drives the LEDs 21 to 23 to emit light in accordance with the display on the element 17.

  The projection image processing unit 14, the video memory 15, the projection image driving unit 16, and the projection light driving unit 28 all operate under the control of the CPU 29. The CPU 29 reads out an operation program, fixed data, and the like stored in the program memory 31 including the following processing, loads them into the main memory 30, and executes control processing.

  FIG. 2 is a flowchart showing the processing contents for setting the screen size at the time when an analog image signal in the moving image format is input to either the A / D conversion unit 11 or the video decoder 12.

  At the beginning of the process, the CPU 29 performs a process of determining the screen size of the RGB signal input to the A / D converter 11 or the video signal input to the video decoder 12 (step S101).

  As described above with reference to FIG. 5, the time between the horizontal synchronizing signals is measured as the horizontal total time, and the number of horizontal synchronizing signals between the vertical synchronizing signals is counted as the number of vertical total lines, and is obtained per second. This is realized by counting the number of vertical synchronizing signals as a frequency.

  Based on the horizontal total time, the number of vertical total lines, and the frequency thus obtained, the corresponding candidate is compared with the horizontal total time, the number of vertical total lines and the frequency for each screen size stored in advance in the program memory 31. It is determined whether there are a plurality (step S102).

  FIG. 3 shows a group of a plurality of candidates that are stored in advance in the program memory 31 as described above and approximate to the total horizontal time and the total number of vertical lines. Here, an example is shown in which a total of seven groups, group (gr.) “A” to group “G”, are registered as values approximated by the total horizontal time and the total number of vertical lines.

  As a result of determining whether or not the CPU 29 corresponds to the plurality of candidates shown in FIG. 3 above, if the CPU 29 determines that there is a single screen size candidate instead of a plurality of candidates, the CPU 29 determines the screen size and frequency. Therefore, the projection image processing unit 14 is set to execute normal scaling processing (step S103).

  When the setting of the scaling process is thus completed, the projection operation based on the input image signal is started (step S104), and the process related to the setting of the screen size in FIG. Transition.

  If it is determined in step S102 that one of the groups shown in FIG. 3 corresponds to a plurality of candidates, a sample image corresponding to each screen size in the corresponding group is created.

  That is, after confirming that there is a candidate that is not ready for display (step S105), the screen size and frequency are read out, and a sample image of 1/4 size of normal scaling is created according to the read contents (step S105). S106), display coordinates on the screen, for example, display coordinates corresponding to the upper left quarter are set (step S107).

  Thereafter, the process returns to step S105 again to determine whether there is a candidate that has not yet been prepared for display. If it is determined that there is a candidate, the process proceeds to step S106 in the same manner as described above for other screen size candidates. Playback of the sample image and setting of the coordinate position on the screen are executed.

  Then, when it is determined in step S105 that there are no other candidates that are not ready for display, a four-divided screen using sample images having a plurality of screen sizes created by repeating the processes in steps S106 and S107 is displayed. Projection is performed (step S108).

  FIG. 4 shows a state in which a quadrant screen is formed and projected using the three screen size candidates indicated by the group “A” in FIG. Naturally, since there are four screen areas divided for the three candidates, the sample image is not displayed in the “4” th lower right quarter area, and a black screen is displayed.

  Thus, by assigning and projecting each candidate to a divided screen obtained by equally dividing the entire screen into n (n: natural number of 2 or more) equally, a sample image having the same screen aspect ratio as the original image can be projected.

  That is, in the present embodiment, the micromirror element 17 has a screen size of 1280 pixels by 800 pixels vertically, but by setting each sample image to a screen size of 640 pixels by 400 pixels vertically, both vertical and horizontal A sample image having the same screen aspect ratio as the screen size originally projected when the number of pixels is exactly halved can be displayed by the micromirror element 17.

  In each group shown in FIG. 5, the maximum number of candidates in the group is “3” of group “A”. Therefore, by dividing the entire screen into four with a division ratio n = 2, the maximum number of candidates is Even when a group is applicable, sample images can be created and projected for all candidates with the same screen aspect ratio.

  Therefore, for example, when the number of screen size candidates in the same group is “5” or more, it is necessary to divide the entire screen into three equal parts both vertically and horizontally to create a sample image as a total of nine divided screens.

However, in a state where the quadrant screen shown in FIG.
"Select the correct screen with the cursor keys and operate the set key"
Such a guide message is output from the speaker unit 34 by the voice processing unit 33 to prompt the user to perform a selection operation by the operation / display unit 32 (step S109).

  According to this guide message, it waits for the user to select one of the plurality of projected candidates (step S110).

  In this case, even if the user does not have knowledge about the screen size of the image signal handled by a personal computer or the like, the user can easily see and not visually distort or deviate from the projected screen. By selecting a sample image for depiction and performing an operation as instructed, correct selection can be performed.

  When the user selects a screen size candidate by operating the cursor key and the set key on the operation / display unit 32, the determination is made in step S110, and projection is performed according to the screen size and frequency of the selected candidate. The image processing unit 14 is set to execute scaling processing (step S103).

  When the setting of the scaling process is thus completed, the projection operation based on the input image signal is started (step S104), and the process related to the setting of the screen size in FIG. Transition.

  As described above in detail, according to the present embodiment, when there are a plurality of approximate candidates as a result of the screen size determination, a plurality of sample images reduced in a state in which the projected screen aspect ratio is maintained are projected on the divided screen. By encouraging the user to select the correct screen size, the selection of the correct screen size is left to the user's selection, the scaling process is performed again according to the selected screen size candidate, and the projection operation is started. It becomes possible to set the size accurately.

  Further, in the above embodiment, since not only the screen size but also the frequency is taken into consideration, a plurality of favorable catches approximated by the horizontal total time and the number of vertical lines are grouped. Screen size candidates can be selected.

  In the above embodiment, the screen is equally divided vertically and horizontally to generate and project a multi-screen to which a plurality of candidate reduced sample images are assigned, so that the screen aspect ratio is the same as the screen aspect ratio after setting. One of the candidates can be selected, and an image having a correct screen aspect ratio can be reliably projected after setting.

  In addition, although the said embodiment demonstrated the case where it applied to the data projector apparatus of a DLP (trademark) system, this invention is a display system for forming the projection system of a projector, a light source element, a light image, or a display element. Is not limited to a single-plate type / multi-plate type or the like, and a projection device that projects an image according to the stored contents after temporarily storing an image signal in a memory, or a projection method or projection used in the projection device Any program for operating the apparatus can be applied.

  In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the functions executed in the above-described embodiments may be combined as appropriate as possible. The above-described embodiment includes various stages, and various inventions can be extracted by an appropriate combination of a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, if the effect is obtained, a configuration from which the constituent requirements are deleted can be extracted as an invention.

  DESCRIPTION OF SYMBOLS 10 ... Data projector apparatus, 11 ... A / D conversion part, 12 ... Video decoder, 13 ... USB interface (I / F), 14 ... Projection image processing part, 15 ... Video memory, 16 ... Projection image drive part, 17 ... Micromirror element, 18 ... light source, 19 ... mirror, 20 ... projection lens, 21 ... R-LED, 22 ... G-LED, 23 ... B-LED, 24 ... dichroic mirror, 25 ... integrator, 26 ... dichroic mirror , 27 ... mirror, 28 ... projection light drive unit, 29 ... CPU, 30 ... main memory, 31 ... program memory, 32 ... operation / display unit, 33 ... sound processing unit, 34 ... speaker unit, SB ... system bus.

Claims (5)

An input means for inputting an image signal;
Scaling processing means for generating image data of a preset screen size using the image signal input by the input means;
Projection means for forming and projecting a light image from the image data obtained by the scaling processing means;
Measuring means for measuring the screen size of the image signal input by the input means;
Candidate storage means for grouping and storing a plurality of screen size candidates corresponding to the measurement results of the measurement means;
Based on the result of measurement by the measurement means, the candidate storage means is referred to, and based on each of a plurality of candidates constituting the corresponding group, a reduced sample image using the image signal input by the input means is converted to the scaling processing means. Sample image projecting means for generating a multi-screen by assigning a plurality of reduced sample images generated by the projecting means,
Selection accepting means for accepting that one of the images projected as a multi-screen by the projecting means is selected by the sample image projecting means;
A projection apparatus comprising: setting means for setting screen size candidates corresponding to an image of a selection result received by the selection receiving means to the scaling processing means to generate image data.   The projection apparatus according to claim 1, wherein the candidate storage unit groups and stores a plurality of candidates including a screen size and frequency information.   The sample image projecting means causes the scaling processing means to generate a multi-screen in which the plurality of candidate reduced sample images are assigned to a screen obtained by dividing one screen into vertical n × horizontal n (n: a natural number of 2 or more), The projection apparatus according to claim 1, wherein projection is performed by the projection unit. An input unit for inputting an image signal, a scaling processing unit for generating image data of a preset screen size using the image signal input by the input unit, and an optical image by the image data obtained by the scaling processing unit A projection method using a projection apparatus having a projection unit for forming and projecting,
A measurement step of measuring the screen size of the image signal input by the input unit;
The candidate information obtained by grouping a plurality of screen size candidates corresponding to the measurement results in the measurement process is stored in a memory in advance, the candidate information is referred to by the measurement results in the measurement process, and the corresponding group is selected. Based on each of a plurality of constituting candidates, a reduced sample image using the image signal input by the input unit is generated by the scaling processing unit, and a plurality of reduced sample images generated by the projecting unit are assigned to the multi- sample. A sample image projection process for projecting as a screen;
A selection accepting step of accepting that one of the images projected as a multi-screen by the projection unit in the sample image projecting step is selected;
A projection method comprising: a setting step of generating image data by setting a screen size candidate corresponding to an image of a selection result received in the selection reception step in the scaling processing unit . An input unit for inputting an image signal, a scaling processing unit for generating image data of a preset screen size using the image signal input by the input unit, and an optical image by the image data obtained by the scaling processing unit A program executed by a computer built in a projection apparatus including a projection unit that forms and projects,
The above computer
Measuring means for measuring the screen size of the image signal input at the input unit,
Candidate storage means for grouping and storing a plurality of screen size candidates corresponding to the measurement results of the measurement means;
Based on the result of measurement by the measurement unit, the candidate storage unit is referred to, and based on each of a plurality of candidates constituting the corresponding group, a reduced sample image using an image signal input by the input unit is obtained by the scaling processing unit. Sample image projection means for generating and assigning a plurality of reduced sample images generated by the projection unit to project as a multi-screen;
Selection accepting means for accepting that one of the images projected as a multi-screen by the projecting unit by the sample image projecting means is selected, and screen size candidates corresponding to the selection result image accepted by the selection accepting means. A program for causing the scaling processing unit to function as setting means for generating image data.

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