JP4973260B2 - Presentation system and presentation method using projector having network function - Google Patents

Description

  The present invention uses a projector having a network function that, when giving a presentation using an image signal device typified by a personal computer, causes the projector to project presentation data output from the image signal device via an arbitrary network network. The present invention relates to a presentation system and a presentation method.

  2. Description of the Related Art In recent years, projector projection systems having a network function for transmitting an image displayed on a personal computer to a projector and projecting them using a network (particularly, a wireless LAN) without using an RGB cable are rapidly spreading. .

  On the other hand, in personal computers, the number of display pixels is increasing year by year and the resolution is accelerating as the basic components such as CPUs and liquid crystal panels become higher in performance and lower in price.

  A presentation system using a projector having a conventional network function will be described below.

  2. Description of the Related Art Conventionally, a presentation system using a projector having a network function is known as described in Patent Document 1.

  FIG. 8 shows a configuration diagram of the presentation system described in Patent Document 1. In FIG.

  In FIG. 8, 101 is an image signal device represented by a personal computer, 102 is a projector having a network function, 103 is an arbitrary network, and 104 is a screen that projects an image enlarged and projected from the projector 102.

  A conventional presentation system configured as described above will be described.

  When image data is transmitted from the image signal device 101 to the projector 102 via an arbitrary network 103, the bandwidth of the network network 103 is limited, so the amount of image data transmitted from the image signal device 101 to the projector 102 needs to be suppressed. There is.

  For this reason, if the image data is transmitted as it is, it takes time to transmit, the display speed of the projection by the projector is delayed, and it becomes difficult to faithfully reproduce the operation of the animation effect image such as wipe or fade. .

  Therefore, the image area displayed on the image signal device 101 is virtually divided into a plurality of blocks (4 × 4 = 16 divisions from A to P in the example of FIG. 8), and the change of the image data is changed for each block. Only the image data of the detected block and the detected change is transmitted to the projector 102.

Thereby, the amount of image data passing through the network 103 is suppressed, and the image projected from the projector 102 onto the screen 104 can be updated at high speed.
JP 2003-50694 (paragraph number “0010”)

  However, in the above-described conventional configuration, when the display resolution numbers of the image signal device 101 and the projector 102 are different, as shown in FIG. 8, when the number of blocks for virtually dividing both display image areas is made uniform, In some cases, the number of pixels included in one block is fractional, and as a result, the image projected from the projector 102 moves left and right or blinks in the vicinity of the boundary between the blocks due to a rounding error in coordinate calculation. Was produced.

For example, the number of display pixels in both horizontal directions is
Image signal device 101... 1400 dots Projector 102... 1024 dots At this time, if the number of blocks virtually dividing the display image area is 256 in the horizontal direction, the number of horizontal pixels included in each block is ,
Image signal device 101... 1400 ÷ 256 = 5.46875 dots Projector 102... 1024 ÷ 256 = 4 dots That is, since the number of horizontal pixels included in one block in the image signal device 101 is a fraction, The pixel data information of the block and the boundary between the blocks is reflected or not reflected in the image projected from the projector 102, so that the coordinate position of a part of the image data moves left and right by 1 dot on the projector 102. Alternatively, a phenomenon that the display of the image data blinks occurs.

  In order to solve the above problems, the image signal device 101 calculates the greatest common divisor between the display resolution numbers of the image signal device 101 and the projector 102, and based on the result, the display image area of each device is calculated. There is a method for calculating the number of blocks virtually divided.

  An operation flowchart of this method is shown in FIG.

  In FIG. 9, the display resolution numbers of the image signal device 101 and the projector 102 are compared to determine whether or not they match (step S101). If they match, a predetermined value is displayed. The number of blocks for virtually dividing the image area is set (step S102). If they do not match in step S101, the greatest common divisor of both is calculated (step S103), and the calculation result is set as the number of blocks for virtually dividing the display image area of each device (step S104).

For example, the number of display pixels in both horizontal directions is
Image signal device 101... 1400 dots Projector 102... 1024 dots At this time, since the greatest common divisor of both is 8, the number of horizontal pixels included in each block is
Since the image signal device 101... 1400 ÷ 8 = 175 dots and the projector 102... 1024 ÷ 8 = 128 dots are both integers, the above-described problems do not occur.

  However, since the number of pixels included in each block is extremely large, the amount of image data transmitted from the image signal device 101 to the projector 102 via the network 103 is inevitably large, and as a result, the image is projected from the projector 102. There has been a problem that the display speed of image data becomes slow.

  The present invention solves the above-described conventional problems, and even when the image signal apparatus and the projector connected via an arbitrary network have different display resolution numbers, the image projected from the projector is not between blocks. Presentation system and presentation method using a projector having a network function capable of increasing the display speed of image data displayed from the projector without causing a phenomenon such as moving left and right or blinking in the vicinity of the boundary The purpose is to provide.

According to the first aspect of the present invention, a presentation using a projector having a network function including an image signal device represented by a personal computer and a projector connected to the image signal device through an arbitrary network network. In the system,
The image signal device comprises:
A display means A for displaying image data, an image acquisition means for obtaining the updated image data each time the image data is updated, and an image display area on the display means A are virtually divided into a plurality of blocks An image comparison unit that detects which block of the image display area divided by the calculation unit corresponds to the calculation unit that divides the image data into the image display unit, and the image comparison unit. Communication means A for transmitting the image data of the detected block to the projector via the network, and control means for controlling the display means A, the image comparison means, the calculation means, and the communication means A, respectively. A and
The projector is
Communication means P for receiving the image data transmitted from the image signal device, image development means for developing the image data received by the communication means P into an arbitrary format, and the image development means developed by the image development means The display means P, which receives image data as an input and enlarges and projects the image on the screen through a display element, and the communication means P, the image expansion means, and the control means P for controlling the display means P, respectively.
The computing means is
It is determined whether or not the display pixel numbers of the display unit A and the display unit P match. If they match, the displayable area in the display unit A is virtually divided by the set default value. If they do not match, the greatest common divisor of both resolution numbers is calculated in the horizontal direction and the vertical direction, respectively. If the greatest common divisor is greater than or equal to a predetermined value, the display means A displays with the greatest common divisor. the area is divided virtually, if the greatest common divisor is smaller than the predetermined value, and said display unit a on the display means the display number of display pixels is less than values determined from the resolution number of elements P And a function of virtually dividing a displayable area in the display means A and the display means P based on the value calculated by calculating a value in which the greatest common divisor is greater than the predetermined value. War Is obtained by a presentation system using a projector has a function,
Even when the number of resolutions of the image signal device and the projector connected via an arbitrary network is different, there is a problem that the image projected from the projector moves or blinks in the vicinity of the boundary between the blocks. It has the effect of increasing the display speed of the image projected from the projector without causing it.

Display invention according to claim 2, in said operation means, wherein when the greatest common divisor of the number of display pixels of the display unit A and the display means P is smaller than the predetermined value, included in the display unit P The display means P, which is calculated based on a value smaller than the number of display pixels determined by the number of resolutions of the elements and for which the greatest common divisor with the display means A is greater than the predetermined value. GCD virtual display pixel number, when ratio of the resolution number of display elements included in the display unit P is smaller than a predetermined threshold value, the number of display pixels of the display unit a and the display unit P in 2. The presentation system using a projector having a network function according to claim 1, wherein the displayable area in the display means A and the display means P is virtually divided by a number. And than,
Even when the number of resolutions of the image signal device and the projector connected via an arbitrary network is different, there is an effect of increasing the display speed without significantly narrowing the display area of the image projected from the projector.

According to a third aspect of the present invention, when the display means A and the display means P do not match in the arithmetic means, the display means A and the display means A and When a table in which values of the number of blocks for virtually dividing the displayable area in the display means P are described in advance and a combination of both is described in the table, the display means A and When the displayable area in the display means P is virtually divided and is not described, a desired greatest common divisor is calculated in the same manner as described above, and based on the value, the display means A and the display means P 3. The projector having a network function according to claim 1, wherein the displayable area is virtually divided and the value is overwritten and stored in the table. Is obtained by a presentation system,
Even when the number of resolutions of the image signal device and projector connected via an arbitrary network is different, the greatest common divisor required to increase the display speed of the image projected from the projector can be acquired immediately. It has the effect of.

According to a fourth aspect of the present invention, there is an arbitrary number of display pixels from the projector to the screen with a display pixel number smaller than the number of display pixels determined by the number of resolutions of the display elements included in the display unit P based on the calculation result in the calculation unit. 4. The network according to claim 1, wherein, when projecting image data, a display element included in the display unit P displays a black color for a display element not corresponding to the image data. 5. It is a presentation system that uses a projector with a function,
Even when the number of resolutions of the image signal apparatus and the projector connected via an arbitrary network is different, the display speed of the video projected from the projector is increased and the image quality is improved.

According to a fifth aspect of the present invention, there is an arbitrary number of display pixels from the projector to the screen with a display pixel number smaller than the display pixel number determined by the number of resolutions of the display elements included in the display unit P based on the calculation result in the calculation unit. The image enlargement means for enlarging the image data output from the image expansion means to the number of resolutions of display elements included in the display means P when projecting image data. A presentation system using a projector having the network function according to any one of 3;
Even when the number of resolutions of the image signal device and the projector connected via an arbitrary network is different, there is an effect of increasing the display speed without reducing the display area of the image projected from the projector.

The invention according to claim 6 is a presentation method using a projector having a network function composed of an image signal device typified by a personal computer and a projector connected to the image signal device through an arbitrary network.
When the comparison result is the same in the resolution number comparison step for comparing the number of resolutions that can be displayed by the image signal device and the number of resolutions that can be displayed by the projector, and in the resolution number comparison step, the image signal The first block number setting step for setting a default value as a division number for virtually dividing the image display area of the apparatus into a plurality of blocks, and the comparison result in the resolution number comparison step, the image is not matched. a greatest common divisor calculation step the resolution number and the projector signal device is to be displayed is the greatest common divisor calculation horizontal and vertical directions, respectively of the resolution number to be displayed, calculated by the greatest common divisor calculation step In the greatest common divisor determination step for determining whether the value is equal to or greater than a predetermined value, and in the greatest common divisor determination step If output result is more than the predetermined value, and a second number of blocks setting step of setting the value as the division number for dividing the image display area of the image signal apparatus virtually plurality of blocks, said maximum If the calculated result in the common divisor determination step is smaller than the predetermined value, the projector is the greatest common divisor is a predetermined value of the resolution number said image signal apparatus is to be displayed by reducing the number of resolution that can be displayed A resolution number calculating step for calculating the number of resolutions as described above, and a division for virtually dividing the image display area of the image signal device and the projector into a plurality of blocks based on the value calculated in the resolution number calculating step A third block number setting step for setting the number as a number, and using a projector having a network function. Is obtained by the presentation method,
Even when the number of resolutions of the image signal device and the projector connected via an arbitrary network is different, there is a problem that the image projected from the projector moves or blinks in the vicinity of the boundary between the blocks. It has the effect of increasing the display speed of the image projected from the projector without causing it.

The invention according to claim 7 determines whether the ratio of the number of display pixels and which is determined by the display device wherein the resolution number calculated by the resolution number calculation step the projector has is greater than a predetermined threshold value When the ratio is greater than or equal to a predetermined value by the resolution ratio determining step and the resolution ratio determining step, the value calculated by the resolution number calculating step is virtually divided into a plurality of blocks in the image display area of the image signal device a fourth number of blocks setting step of setting a number of divisions for the resolution ratio when the ratio by decision step is smaller than the predetermined threshold value, a value calculated by the greatest common divisor calculation step the image signal A fifth block that is set as the number of divisions for virtually dividing the image display area of the apparatus and the projector into a plurality of blocks. Is obtained by a presentation method using a projector with a network function according to claim 6, characterized in that it includes a click number setting step, a
Even when the number of resolutions of the image signal device and the projector connected via an arbitrary network is different, there is an effect of increasing the display speed without significantly narrowing the display area of the image projected from the projector.

According to an eighth aspect of the present invention, when the comparison result does not match in the resolution number comparison step, the displayable area in the display means A and the display means P is virtually determined based on the combination of the display pixel numbers of both. A resolution conversion table reference step for referring to a table in which the value of the number of blocks to be divided in advance is stored, and when the desired value exists in the table, a plurality of image display areas of the image signal device and the projector are virtually provided. A sixth block number setting step that is set as a division number for dividing the block into a plurality of blocks, and the value set by the third block number setting step when there is no desired value in the table, the image signal device And the number of divisions for virtually dividing the image display area of the projector into a plurality of blocks and overwriting the table Further comprising a resolution conversion table storage step that exists is obtained by a presentation method using a projector with a network function according to claim 6 or claim 7, wherein,
Even when the number of resolutions of the image signal device and projector connected via an arbitrary network is different, the greatest common divisor required to increase the display speed of the image projected from the projector can be acquired immediately. It has the effect of.

  As described above, the present invention increases the display speed of the image projected from the projector onto the screen even when the image signal device and the projector connected via an arbitrary network have different display resolution numbers. It is possible to faithfully reproduce the operation of the animation effect image such as wipe or fade.

  Accordingly, it is possible to obtain an excellent effect that it is possible to realize an effective presentation using an animation effect image using a personal computer wirelessly connected to a wireless LAN compatible projector.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment 1)
FIG. 1 is a configuration diagram of a presentation system using a projector having a network function according to the present invention.

  In FIG. 1, 1 is an image signal device typified by a personal computer, 2 is a projector, 3 is an arbitrary network network that connects the image signal device 1 and the projector 2 via Ethernet (registered trademark) or the like, and 4 is a projector. 2 is a screen that projects an image enlarged and projected from 2;

  FIG. 2 is an internal configuration diagram of the image signal device 1 and the projector 2. In FIG. 2, 11 is a control means A, 12 represented by a CPU for controlling each block in the image signal device 1, and includes a display element represented by a liquid crystal panel, and arbitrary application software is provided on the display element. The display means A and 13 for displaying the image data generated by the above are image acquisition means for acquiring the image data displayed by the display means A12, and 14 is the number of resolutions that can be displayed by the image signal device 1 and the projector 2, respectively. Calculation means 15 for calculating the number of divisions for virtually dividing the displayable area on the image signal device 1 and the projector 2 based on the image acquisition means 13 for each block divided by the calculation means 14. The image comparison means 16 for detecting whether or not the image data that has been changed is connected to the projector 2 via an arbitrary network 3 The communication means A and 21 that transfer the image data of the entire block whose image data has been changed by the image comparison means 15 to the projector 2 via the network 3 are control represented by a CPU that controls each block in the projector 2. Means P and 24 are connected to the image signal device 1 via an arbitrary network 3, and the communication means P and 23 for receiving arbitrary image data transmitted from the image signal device 1 are received by the communication means P24. An image expansion means for expanding the image data into an arbitrary format, 22 includes a display element typified by a liquid crystal panel or a DLP panel, and a display for displaying the image data expanded by the image expansion means 23 on the display element Means P.

  The operation of the presentation system using the projector having the network function of the present embodiment configured as described above will be described below.

  First, the image signal device 1 and the projector 2 are connected on the network 3. As this connection method, for example, when Ethernet (registered trademark) is used as the network 3, there is a method of giving a fixed IP address of the same group to the image signal device 1 and the projector 2 in advance.

  An example is shown below.

Settings on the image signal device 1 side
IP: 192.168.16.1
Subnet mask: 255.255.255.0
Projector 2 settings
IP: 192.168.16.100
Subnet mask: 255.255.255.0
Further, either the image signal device 1 or the projector 2 serves as a DHCP (Dynamic Host Configuration Protocol) server, and connection can be made by a method of assigning an IP address to a device connected to an arbitrary network 3.

  Furthermore, when a wireless network is used as the network 3, the image signal device 1 and the projector 2 can be connected by ad hoc connection. Normally, when the projector 2 is started from the standby power supply state, the lamp is turned on. The drive circuit for turning on the lamp is a high voltage circuit, and noise propagates inside the projector 2 during driving. That is, there is a case where the two devices cannot be normally connected during the lamp lighting operation. Therefore, the image signal device 1 always detects the lighting operation of the lamp mounted on the projector 2, and connects both devices again after the lamp is turned on.

  Next, the display of the image data generated by the application software operated on the image signal device 1 is displayed on the display element included in the display unit A12 via the control unit A11. The image acquisition unit 13 acquires the image data displayed by the display unit A12 and outputs it to the image comparison unit 15. The image comparison unit 15 virtually divides the displayable area of the display element included in the display unit A12 into a plurality of blocks, and detects whether the image data included in the block has changed for each block. To do. For example, by comparing the image data acquired by the image acquisition unit 13 and the image data acquired by the image acquisition unit 13 at the next timing, the changed image data can be easily grasped.

  Further, the timing at which the image acquisition means 13 acquires the image data displayed by the display means A12 is at a fixed time interval or when the control means A11 detects a drawing command for drawing the image data on the display element in the display means A12. There are various methods.

  Here, when the timing at which the image acquisition unit 13 acquires the image data is set as a timing for issuing a drawing command for drawing the image data on the display element, it is possible to easily grasp which image data is updated. Therefore, the image acquisition unit 13 does not always have to acquire the entire image data displayed by the display unit A12, and the image acquisition time can be greatly shortened by acquiring only the updated image data.

  The image comparison unit 15 extracts the updated image data of the entire block including the pixel data determined to be updated, and transfers the extracted image data to the communication unit A16. At this time, the format of the image data transferred to the communication means A16 includes non-compressed or lossless compression format represented by PNG format or lossy compression format represented by JPEG format.

  In addition to the image data output from the image comparison unit 15, the communication unit A 16 includes position coordinate information indicating which block the image data corresponds to, an IP address for connecting to the projector 2 via the network 3, and a MAC. Data provided with connection information such as an address is transferred to the projector 2. At this time, the unit of data transferred from the image signal device 1 to the projector 2 may be in units of blocks, but adjacent blocks may be combined into one to increase transfer efficiency.

  As described above, the communication unit P24 that has received the data transferred from the image signal device 1 transfers the received image data to the image development unit 23, and expands the image data into an arbitrary format. Here, from the data received by the communication means P24, the control means P21 detects which block the image data corresponds to, and transmits the detection result to the image development means 23. The image development means 23 receives the information. Based on this, the expanded image data is arranged at a desired position.

  As described above, the display unit P22 that receives the image data expanded by the image expansion unit 23 displays the image data on a display element such as a liquid crystal panel or a DLP panel and enlarges and projects the image data on the screen 4.

  Here, the number of blocks for virtually dividing the displayable area of the display elements included in the display unit A12 and the display unit P22 into a plurality is calculated by the calculation unit 14. An operation flowchart of the computing means 14 is shown in FIG. 3, and the operation will be described below.

  After the image signal device 1 and the projector 2 are connected via the network 3, the image signal device 1 inquires of the projector 2 about the resolution number information of the display elements included in the projector 2. Receiving this inquiry information, the projector 2 notifies the image signal device 1 of the resolution number information of the display element via the network 3. The communication means A16 that has received this information transfers the information to the control means A11. The control unit A11 transfers the resolution number information of the display element included in the display unit A12 and the resolution number information of the projector 2 received as described above to the calculation unit 14. Receiving the resolution number information of each device, the computing means 14 compares the number of resolutions (step S1), and if the two resolution numbers match, the display unit A12 and the display means display preset default values. The number of blocks to virtually divide the displayable area of P22 is set (step S2). As the number of blocks to be divided increases, image update display can be performed at a higher speed. However, there is a disadvantage that the number of processes for management control increases.

Usually, the number of horizontal pixels included in one block is preferably between 4 and 16 dots. For example, when the resolution number of the display element of the projector 2 is XGA size (1024 dots × 768 lines), it is the default. As a value,
Setting is made so that the horizontal direction is divided into 128, with 1024 ÷ 8 = 128 blocks.

Similarly, calculate the vertical direction,
Since 768 ÷ 8 = 96 blocks, the total number of blocks virtually divided is
128 × 96 = 1288 blocks. That is, when it is determined in step S1 that the number of resolutions of the image signal device 1 is also the XGA size, in step S2, the calculation unit 14 displays the display included in the display unit included in the display unit A12 with respect to the image comparison unit 15. Commands the possible area to be virtually divided into 128 in the horizontal direction and 96 in the vertical direction.

  Furthermore, the calculation means 14 transmits the said division | segmentation information with respect to the projector 2 via the communication means A16 from the control means A11 (step S8). This is because the present presentation system uses a method of virtually dividing the displayable area of the image signal device 1 into a plurality of blocks and transferring the image data for each block in order to increase the image transfer speed. This is because the number of blocks virtually dividing each displayable area of the image signal device 1 on the transmission side and the projector 2 on the reception side is matched.

  On the other hand, when the image signal device 1 and the projector 2 have different resolution numbers in step S1, the calculation means 14 calculates the greatest common divisor of both resolution numbers (step S3), and the calculated greatest common divisor is predetermined. It is determined whether or not the value is larger than (step S4).

  In step S4, when the greatest common divisor obtained in step S3 is larger than the predetermined value, the displayable area of the display element included in the display means A12 is virtually divided by the greatest common divisor calculated in step S3. The number of blocks to be used is set (step S5).

  As a predetermined value used in step S4, about 50 is desirable from experience. Here, as the predetermined value is smaller, the number of pixels included in one block increases, so that the time for compressing the pixel data included in the block and the transfer time for transferring an arbitrary network 3 increase. Since there is a high probability that some pixel always changes in the block, there is a problem that all blocks must be transferred at all times.

On the other hand, if the predetermined value is increased too much, there arises a problem that the corresponding greatest common divisor cannot be obtained. An example in which the predetermined value is 50 is shown below. The number of horizontal display resolutions of each device
Image signal device 1 ... 1280 dots Projector 2 ... When there are 1024 dots, the greatest common divisor is 256,
Greatest common factor 256> 50
That is, in step S5, the number of blocks virtually dividing the displayable area of the display elements included in the display unit A12 and the display unit P22 is 256. At this time, the number of display pixels included in one block is
Image signal device 1... 1280 ÷ 256 = 5 dots Projector 2... 1024 ÷ 256 = 4 dots.

In step S1, the horizontal display resolution number of each device is
Image signal device 1 ... 1400 dots Projector 2 ... If there are 1024 dots, the greatest common divisor is 8,
Greatest common divisor 8 <50
It becomes.

  The calculating means 14 reduces the number of horizontal resolutions of the projector 2 from 1024 dots, and calculates a number with the greatest common divisor of 50 or more (step S6). The number may be lowered by one dot at a time, and the greatest common divisor may be calculated each time. However, the number of resolutions may be lowered by 4 dots or 8 dots.

In the case of the above example, when the horizontal resolution number of the projector 2 is 1000 dots, the greatest common divisor is 200,
Greatest common divisor 200> 50
Thus, the number of blocks virtually dividing the displayable area of the display elements included in the display unit A12 and the display unit P22 is set to 200 (step S7). At this time, the number of display pixels included in one block is
Image signal device 1... 1400 ÷ 200 = 7 dots Projector 2... 1000 ÷ 200 = 5 dots. Here, in the above example, in the conventional method, since the greatest common divisor 8 calculated in step S3 is applied, the number of display pixels included in one block at this time is
Image signal device 1... 1400 ÷ 8 = 175 dots Projector 2... 1024 ÷ 8 = 128 dots.

  Compared to this method, the block size is about 25 times larger, the calculation time for reducing the image data becomes longer, the amount of image data becomes larger, and the transfer time for transferring the network 3 also becomes longer. There was a problem that the display of the image data transferred from the apparatus 1 to the projector 2 was delayed, but by adopting this method, the capacity of the image data contained in one block can be greatly reduced, and the image signal Even when the number of resolutions of the device 1 and the projector 2 are different, an image display speed equivalent to that when the number of resolutions of the image signal device 1 and the projector 2 match is obtained.

  Similarly in the vertical direction, the number of divisions can be calculated by the calculation means 14, but the aspect ratio of the display element is limited to several types, and can be calculated as follows.

For example, as shown in the above example, when the resolution of the image signal device 1 is SXGA + (1400 dots × 1050 lines) and the resolution number of the projector 2 is XGA (1024 dots × 768 lines), the aspect ratio is
Image signal device 1... 1400: 1050 = 4: 3
Projector 2... 1024: 768 = 4: 3
Both are 4: 3.

In step S6, when the number of horizontal resolutions of the projector 2 is 1000 dots, the number of vertical resolutions is maintained by maintaining the aspect ratio.
1000 × (3 ÷ 4) = 750 dots may be used. At this time, since the greatest common divisor in the vertical direction is 150, the number of display pixels in the vertical direction included in one block is
Image signal device 1... 1050/150 = 7 dots Projector 2... 750/150 = 5 dots That is, the size of one block is:
Image signal device 1... 7 dots × 7 dots Projector 2... 5 dots × 5 dots.

Here, although the projector 2 has a display element having the XGA resolution number, the number of resolutions that can be displayed on the projector 2 by the computing means 14 is
If 1000 dots x 750 dots,
Horizontal direction: 1024-1000 = 24 dots Vertical direction: 768-750 = 18 dots display area is not used.

In step S8, the control means P21 is notified from the image signal device 1 that the image area to be displayed from the projector 2 is 1000 dots × 750 dots, and therefore, for example, as shown in FIG. In addition,
Display of an image projected from the projector 2 onto the screen 4 by controlling the image area of 24 dots ÷ 2 = 12 dots in the vertical direction to be black in the left / right or up / down direction. It becomes possible to display without losing quality.

  Of course, the same effect can be obtained even if display image data is not arranged in the center of the screen 4.

Further, as shown in FIG. 5, by providing the image enlargement means 25 for enlarging the image data output from the image development means 23 by the control means P21 at an arbitrary enlargement ratio, the resolution of the display elements included in the display means P22 is provided. Thus, the enlarged display can be performed from the projector 2. For example, in the above example, for a display element having XGA resolution,
When projecting image data from the projector 2 with a resolution of 1000 dots × 750 dots, the control means P21
Horizontal direction: 1024/1000 = 1.024 times Vertical direction: 768/750 = 1.024 times and the desired magnification information is transmitted, so that the number of resolutions of image data projected from the projector 2 to the screen 4 is always XGA. It becomes possible to make it a size.

  Here, the control means P21 calculates the enlargement ratio in the horizontal and vertical directions when the aspect ratio of the image data that can be displayed by the image signal device 1 and the aspect ratio that can be displayed by the projector 2 are different. This is because the horizontal and vertical enlargement rates are different. In this case, it is common to match the enlargement ratio to the smaller enlargement ratio. This is to avoid the problem that when the enlargement ratio is set higher, the number of resolutions in the other direction exceeds the number of resolutions of the projector 2, and as a result, part of the image data is lost.

  As described above, according to the present embodiment, when the number of resolutions of the image display elements included in the image signal device 1 and the projector 2 are different, the greatest common divisor of the number of resolutions of both the image display elements is more than a predetermined value. In the case of being small, a value that is smaller than the number of resolutions of the display elements of the projector 2 and the greatest common divisor with the number of resolutions of the display elements of the image signal device 1 is larger than the predetermined value is calculated. Even if the number of resolutions of the image signal device 1 and the projector 2 connected via an arbitrary network 3 are different by calculating the number of blocks that virtually divide both displayable areas in the projector 2, the projector 2. Thus, it is possible to increase the image display speed of the image data displayed.

(Embodiment 2)
FIG. 6 is an explanatory diagram of the operation of the presentation system using the projector having the network function of the present invention. In addition, the same code | symbol is used about the same structure as Embodiment 1 mentioned above, and description is abbreviate | omitted.

  In the first embodiment, the displayable area of the projector 2 is made small in order to minimize the number of pixels per block virtually divided into a plurality of blocks in step S6. However, depending on the combination of the resolution numbers of the image signal device 1 and the projector 2, the displayable area of the projector 2 may be greatly narrowed in order to satisfy the condition of step S4. In that case, if the area that is not displayed on the screen 4 is black as shown in FIG. 4, there arises a problem that the expectation of the presenter who wants to make a presentation on the large screen using the projector 2 cannot be met.

  Further, even when the image data is enlarged by the image enlargement means 25 shown in FIG. 5, the enlargement ratio becomes large, so that the image projected on the screen 4 is blurred.

  In order to solve such a problem, in the second embodiment, as shown in FIG. 6, the percentage of resolution of the projector 2 calculated in step S 6 is what percentage of the resolution number of the display element the projector 2 has. It is calculated whether or not the value is greater than or equal to a predetermined threshold (step S9). It is desirable to set a value between 85% and 90% as this threshold value.

  When it is determined in step S9 that the threshold value is equal to or greater than the predetermined threshold value, the calculation unit 14 can display the highest common divisor calculated in step S6 with respect to the image comparison unit 15 in the display elements included in the display unit A12 and the display unit P22. This is set as the number of blocks for virtually dividing the area (step S7).

  On the other hand, if it is determined in step S9 that it is smaller than the predetermined threshold, the displayable area of the display elements included in the display means A12 and the display means P22 is virtually divided using the greatest common divisor calculated in step S3. The number of blocks is set (step S10).

  As described above, according to the present embodiment, in step S9, means for calculating the percentage of the resolution number of the projector 2 calculated in step S6 with respect to the resolution number of the display element included in the projector 2 is provided. As a result, the number of blocks to be divided can be set appropriately depending on the combination of the resolution numbers of the image signal device 1 and the projector 2, and the problem that the image display area projected from the projector 2 onto the screen 4 is greatly reduced can be easily solved. It becomes possible to do.

(Embodiment 3)
FIG. 7 is an operation flowchart of the presentation system using the projector having the network function of the present invention. In addition, the same code | symbol is used about the same structure as Embodiment 1 and Embodiment 2 mentioned above, and description is abbreviate | omitted.

  In FIG. 7, when it is determined in step S1 that the number of resolutions of the image signal device 1 and the projector 2 are different, the control unit A11 virtually displays the displayable areas of the display elements included in the display unit A12 and the display unit P22. Whether or not there is combination information of a desired number of resolutions in a table in which the value of the number of blocks to be divided in advance is searched (step S11). If the desired information exists, a value based on the table information Is the number of blocks for virtually dividing the displayable area of the display means A12 and the display means P22 (step S12).

  In step S11, if the desired information does not exist in the table, the number of blocks for virtually dividing the displayable areas of the display means A12 and the display means P22 through steps S3 to S7 as shown in the first embodiment Is calculated, the value is overwritten on the table, and the table information is updated (step S13).

  As described above, according to the present embodiment, by providing a table that depends on the combination of the resolution numbers of the image signal device 1 and the projector 2, when the resolution numbers of the image signal device 1 and the projector 2 are different, an arbitrary It is possible to reduce the time required for the processes from step S3 to step S7 each time the network 3 is connected, and to obtain an effect of quickly starting up an image projected from the projector 2 to the screen 4. it can.

  The presentation system using a projector having a network function according to the present invention has the effect of increasing the transfer speed of transferring image data via an arbitrary network even when the image signal device and the projector have different resolution numbers. It is useful as a presentation system using a projector having a network function.

Configuration diagram of a presentation system using a projector having a network function in Embodiment 1 of the present invention Internal configuration diagram of a presentation system using a projector having a network function in the first embodiment Operation explanatory diagram of the presentation system using the projector having the network function in the first embodiment Operation explanatory diagram of the presentation system using the projector having the network function in the first embodiment Internal configuration diagram of a presentation system using a projector having a network function in the first embodiment Operation explanatory diagram of a presentation system using a projector having a network function in Embodiment 2 of the present invention Operation explanatory diagram of a presentation system using a projector having a network function in Embodiment 3 of the present invention Configuration diagram of a presentation system using a conventional projector Operational diagram of a presentation system using a conventional projector

Explanation of symbols

DESCRIPTION OF SYMBOLS 11, 21 Control means 12, 22 Display means 13 Image acquisition means 14 Calculation means 15 Image comparison means 16, 24 Communication means 23 Image expansion means 25 Image expansion means 101 Image signal apparatus 102 Projector 103 Arbitrary network network 104 Screen

Claims (8)

In a presentation system using a projector having a network function composed of an image signal device represented by a personal computer and a projector connected to the image signal device through an arbitrary network network,
The image signal device comprises:
A display means A for displaying image data, an image acquisition means for obtaining the updated image data each time the image data is updated, and an image display area on the display means A are virtually divided into a plurality of blocks An image comparison unit that detects which block of the image display area divided by the calculation unit corresponds to the calculation unit that divides the image data into the image display unit, and the image comparison unit. Communication means A for transmitting the image data of the detected block to the projector via the network, and control means for controlling the display means A, the image comparison means, the calculation means, and the communication means A, respectively. A and
The projector is
Communication means P for receiving the image data transmitted from the image signal device, image development means for developing the image data received by the communication means P into an arbitrary format, and the image development means developed by the image development means The display means P, which receives image data as an input and enlarges and projects the image on the screen through a display element, and the communication means P, the image expansion means, and the control means P for controlling the display means P, respectively.
The computing means is
It is determined whether or not the display pixel numbers of the display unit A and the display unit P match. If they match, the displayable area in the display unit A is virtually divided by the set default value. If they do not match, the greatest common divisor of both resolution numbers is calculated in the horizontal direction and the vertical direction, respectively. If the greatest common divisor is greater than or equal to a predetermined value, the display means A displays with the greatest common divisor. the area is divided virtually, if the greatest common divisor is smaller than the predetermined value, and said display unit a on the display means the display number of display pixels is less than values determined from the resolution number of elements P And a function of virtually dividing a displayable area in the display means A and the display means P based on the value calculated by calculating a value in which the greatest common divisor is greater than the predetermined value. War Presentation system using a projector has a function. In the arithmetic unit, displaying the display unit A and the greatest common divisor of the number of display pixels of the display unit P is when the smaller than a predetermined value, which is determined from the resolution number of display elements included in the display unit P A value that is smaller than the number of pixels and a number in which the greatest common divisor with the display means A is greater than the predetermined value is calculated, and the virtual display pixel number of the display means P calculated based on the value is If ratio resolution number of display elements included in the display unit P is smaller than a predetermined threshold value, at the greatest common divisor of the number of display pixels of the display unit a and the display unit P, the display unit a and the 2. A presentation system using a projector having a network function according to claim 1, wherein a displayable area in the display means P is virtually divided. When the display means A and the display means P do not match the display pixel number in the calculation means, the displayable areas in the display means A and the display means P are determined based on the combination of the display pixel numbers of both. When a table in which values of the number of blocks to be virtually divided are described in advance and a combination of both is described in the table, displayable areas in the display means A and the display means P are determined based on the values. If it is virtually divided and not described, the desired greatest common divisor is calculated in the same manner, and based on the value, the displayable area in the display means A and the display means P is virtually divided. 3. A presentation system using a projector having a network function according to claim 1, wherein the value is overwritten and stored in the table. In the case where arbitrary image data is projected from the projector onto the screen with a display pixel number smaller than the display pixel number determined by the resolution number of the display element included in the display unit P according to the calculation result in the calculation unit, the display 4. A presentation system using a projector having a network function according to claim 1, wherein, in the display element included in the means P, the display element to which the image data does not correspond is displayed in black. . When projecting arbitrary image data from the projector to the screen with a display pixel number smaller than the number of display pixels determined by the number of resolutions of the display elements included in the display unit P according to the calculation result in the calculation unit, the image 4. The network function according to claim 1, further comprising image enlarging means for enlarging the image data output from the expanding means up to the number of resolutions of display elements included in the display means P. Presentation system using a projector having In a presentation method using a projector having a network function composed of an image signal device represented by a personal computer, and a projector connected to the image signal device through an arbitrary network network,
A resolution number comparison step of comparing the number of resolutions that can be displayed by the image signal device and the number of resolutions that can be displayed by the projector;
A first block number setting that sets a default value as a division number for virtually dividing the image display area of the image signal device into a plurality of blocks when the comparison results in the resolution number comparison step match Steps,
When the comparison result does not match in the resolution number comparison step, the maximum common divisor between the resolution number that can be displayed by the image signal device and the resolution number that can be displayed by the projector is calculated in the horizontal direction and the vertical direction, respectively. A common divisor calculation step;
A greatest common divisor determining step for determining whether or not the value calculated in the greatest common divisor calculating step is a predetermined value or more;
If the calculated result is equal to or larger than the prescribed value in the greatest common divisor determination step, a second block to set the value as the division number for dividing the image display area of the image signal apparatus virtually plurality of blocks Number setting step,
If the calculated result in the greatest common divisor determination step is smaller than the predetermined value, the greatest common divisor of the resolution number said image signal apparatus is to be displayed by reducing the number of resolutions the projector is to be displayed is given A resolution number calculating step for calculating the number of resolutions equal to or greater than the value of
A third block number setting step for setting the value calculated in the resolution number calculating step as a division number for virtually dividing the image display area of the image signal device and the projector into a plurality of blocks;
A presentation method using a projector having a network function. And resolution ratio determining step of determining the ratio of the number of display pixels and to be determined whether greater than a predetermined threshold value by a display device included in the calculated number of resolution as the projector by the resolution number calculation step,
When the ratio is greater than or equal to a predetermined value by the resolution ratio determining step, the value calculated by the resolution number calculating step is used as the division number for virtually dividing the image display area of the image signal device into a plurality of blocks. A fourth block number setting step to be set;
Dividing wherein when the ratio by resolution ratio judging step is smaller than the predetermined threshold value, a value calculated by the greatest common divisor calculation step an image display area of the image signal device and the projector in virtually plurality of blocks A fifth block number setting step to be set as the number of divisions for
A presentation method using a projector having a network function according to claim 6. When the comparison result does not match in the resolution number comparison step, the value of the number of blocks for virtually dividing the displayable area in the display means A and the display means P based on the combination of the number of display pixels of both. A resolution conversion table reference step for referring to a table described in advance;
A sixth block number setting step for setting a division number for virtually dividing the image display area of the image signal device and the projector into a plurality of blocks when a desired value exists in the table;
Division for virtually dividing the image display area of the image signal device and the projector into a plurality of blocks based on the value set in the third block number setting step when there is no desired value in the table And a resolution conversion table storage step of overwriting and storing the table,
8. A presentation method using a projector having a network function according to claim 6 or 7.

Images