Projection system, program and projection control method

Abstract

To enable suppression of quantity of heat at the time of projection even when a power button is depressed erroneously.SOLUTION: A projection system 100 is configured so that a commercial power supply and a battery power supply can be connected as a source power supply for a light source 131. The projection system 100 comprises: detection means for detecting whether the battery power supply is connected as the source power supply; determination means (quantity-of-heat calculation unit 111) that when it is determined that the battery power supply is connected, determines whether a degree of influence of a no-signal time projection image 121 on quantity of heat to be generated by the image being projected / displayed is larger than a predetermined threshold; processing means (image projection control unit 112) that when it is determined that the degree of influence is larger than the predetermined threshold, generates a processed image by processing the no-signal time projection image 121 so that the degree of influence is reduced; and projection control means (image projection control unit 112) for causing the generated processed image to be projected / displayed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a projection system, a program, and a projection control method. [Background technology]

[0002] Projectors have been developed for some time (for example, see Patent Document 1). In recent years, portable projectors that can be carried around have also been considered. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-198439 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, when carrying a portable projector in a bag, there is a possibility that the power button may be pressed by mistake due to being pushed by something. If projection starts inside the bag, power consumption will be unnecessary. In addition, problems may occur due to heat accumulation from the light source and the projection light.

[0005] The present invention has been made in consideration of the above background, and has an objective of providing a projection system, a program, and a projection control method that can suppress the amount of heat generated during projection even if the power button is pressed by mistake when carrying the projector. [Means for solving the problem]

[0006] In order to solve the above problems, a projection system according to the present invention is configured to be connectable to a commercial power source as an AC power source and a battery power source as a DC power source as a main power source for lighting a light source, and includes a detection means for detecting whether or not the battery power source is connected as the main power source, and a display means for displaying a display image on a predetermined projection surface when the detection means detects that the battery power source is connected, the display means displaying a display image on the predetermined projection surface when an image signal is not input from the outside. heat a determining means for determining whether the amount of heat is greater than a predetermined threshold, a processing means for processing the image so that the amount of heat becomes equal to or less than the predetermined threshold when the determining means determines that the amount of heat is greater than the predetermined threshold, thereby generating a processed image, and a projection control means for projecting and displaying the processed image generated by the processing means. The determining means derives the heat quantity based on the heat quantity emitted by the light source, the heat quantity of an image obtained by projecting pixels of a red component constituting the image, the heat quantity of an image obtained by projecting pixels of a green component constituting the image, and the heat quantity of an image obtained by projecting pixels of a blue component constituting the image. It is characterized by the above. Effect of the Invention

[0007] According to the present invention, it is possible to provide a projection system, a program, and a projection control method that are capable of suppressing the amount of heat generated during projection even if the power button is pressed by mistake. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a functional block diagram of a projection system according to an embodiment of the present invention. [Diagram 2] 1 is an external view of a projection system according to an embodiment of the present invention. [Diagram 3] FIG. 1 is a diagram showing a state in which the projection system according to the present embodiment projects an image onto a screen when no signal is present. [Figure 4] 1 is a graph (gamma curve) of a gamma function used for luminance correction during projection according to the present embodiment. [Diagram 5] 11 is a flowchart of a no-signal projection process when the power button is pressed according to the present embodiment. [Figure 6] 1A and 1B are diagrams illustrating an example of a projection image when no signal is present according to the present embodiment. [Figure 7] FIG. 1 is a diagram illustrating an example of a processed image according to the present embodiment. [Figure 8] FIG. 2 is a diagram illustrating a processed image according to the present embodiment. [Figure 9] FIG. 3 is a diagram illustrating a processed image according to the present embodiment. [Figure 10] FIG. 4 is a diagram illustrating a processed image according to the present embodiment. [Figure 11] FIG. 5 is a diagram illustrating a processed image according to the present embodiment. [Figure 12] 13 is a flowchart of a no-signal projection process when a power button is pressed according to Modification 1 of the present embodiment. [Figure 13] 13 is a flowchart of a no-signal projection process when the power button is pressed according to Modification 2 of the present embodiment. [Figure 14] 13 is a flowchart of a no-signal projection process when the power button is pressed according to Modification 3 of the present embodiment. [Figure 15] 13 is a diagram illustrating an example of a divided projected image according to Modification 3 of the present embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] First, a projection system (projector) in a form (embodiment) for carrying out the present invention will be described. A storage unit of the projection system stores an image to be projected when there is no signal and no image or video to be projected is input (no-signal projection image). The projection system receives the no-signal projection image from the storage unit, and calculates the amount of heat generated when the no-signal projection image is projected (also simply referred to as the amount of heat of the image). In other words, it is determined whether the degree of influence of the image on the amount of heat generated by projecting and displaying the image is greater than a predetermined threshold value. If the calculation result, which is the degree of influence determined by the determining means, exceeds a predetermined threshold, the projection system processes the image so that the amount of heat generated by projecting and displaying the image becomes equal to or less than the predetermined threshold (so that the degree of influence becomes small), and generates a processed image. Next, the processed image is projected by the projection system.

[0010] There are several methods for reducing the amount of heat generated below a certain threshold, including the following. The first method is to process the no-signal projection image to reduce the amount of heat generated (the degree to which the image affects the amount of heat generated by projecting and displaying the image). The second method is to reduce the amount of light (output) from the light source. Other methods include alternately projecting the no-signal projection image and a black image (projecting the no-signal projection image intermittently). The amount of heat generated is calculated from the amount of heat generated by the projection system itself and the amount of heat generated when the projection light of a projected image is converted into heat when no signal is present. The predetermined threshold is determined so that the case in which the projection system is placed, such as a bag, will not be damaged even if heat is accumulated due to the light source and projection light for a predetermined period of time. Even if the power button is pressed by mistake while the projection system is being carried in a bag and an image is projected when no signal is present because the amount of heat is below a predetermined threshold, no problem occurs in the case of the bag or the like.

[0011] Configuration of the projection system in this embodiment Fig. 1 is a functional block diagram of a projection system 100 according to this embodiment. Fig. 2 is an external view of the projection system 100 according to this embodiment. The projection system 100 is a DLP (Digital Light Processing) (registered trademark) type projector. Fig. 3 is a diagram showing a state in which the projection system 100 according to this embodiment projects a no-signal projection image 121 (see Fig. 1) onto a screen 290. The projection system 100 includes a projection image processing unit (scaler) 110, a storage unit 120, a light source 131, a projection element 132, a projection lens 133, and an input / output unit 140. The input / output unit 140 outputs one of the signals input from a VGA (Video Graphics Array) terminal, an HDMI (High-Definition Multimedia Interface) (registered trademark) terminal, an RCA terminal, or the like to the projection image processing unit 110 as a digital image.

[0012] The light source 131 is a light source of red light, blue light, and green light constituted by, for example, an LD (Laser Diode), an LED (Light Emitting Diode), etc. The light source 131 emits the red light, blue light, and green light to the projection element 132. The projection element 132 reflects the incident light in the direction of the projection lens 133 to form an optical image. The formed optical image is projected by the projection lens 133 onto a projection target such as a screen. The projection element 132 is, for example, a micromirror element. The micromirror element has micromirrors arranged in an array (for example, 1280×800). Each micromirror is controlled by the projection image processing unit 110 described later and performs on / off operation at high speed, and forms an optical image by reflecting the light incident from the light source 131 in the direction of the projection lens 133 or diverting it away from the direction of the projection lens 133.

[0013] The projection image processing unit 110 (scaler) constitutes a main CPU (Central Processing Unit) of the projection system 100, and controls the light source 131 and the projection element 132. The projection image processing unit 110 also includes a heat quantity calculation unit 111 and an image projection control unit 112. The heat quantity calculation unit 111 calculates the heat quantity W when the no-signal projection images 121 are continuously projected, using formula (1).

[0014] W = S + Σ(W R ×C R (P R )+W G ×C G (P G )+W B ×C B (P B ))···(1) S is the amount of heat emitted by the light source 131. Σ is the sum for pixels P that make up the image. P R is the luminance of the red component of pixel P. R is the gamma function of the red component used for brightness correction during projection (see Figure 4 below). R is a constant that indicates the heat quantity of the projected image. W R ×C R(P R ) indicates the heat quantity of the image projected by pixel P for the red component. W G ×C G (P G ) and W B ×C B (P B ) are similarly shown, and respectively indicate the heat quantity of an image projected by pixel P for the green component and the heat quantity of an image projected by pixel P for the blue component.

[0015] FIG. 4 is a graph (gamma curve) of a gamma function used for brightness correction during projection according to this embodiment. The horizontal axis is brightness before correction (input value), and the vertical axis is brightness after correction (output value). Curves 161, 162, and 163 are curves showing the gamma functions of red, green, and blue, respectively. When the projection system 100 has multiple projection modes, there is a gamma curve for each projection mode. C included in formula (1) R is the gamma function (gamma curve) of the red component that has the highest value among multiple projection modes. C G Or C B The same applies to the gamma function when calculating the amount of heat using the formula (1), may be configured using a lookup table or other methods.

[0016] In this way, the amount of heat is an integrated value of the luminance. Also, the amount of heat is the amount of heat at an unintended predetermined projection surface. The unintended predetermined projection surface is located in an enclosed space where the projection system 100 is placed, or in a space surrounded by the mounting surface where the projection system 100 is placed and the peripheral side surface. Also, the distance from the projection lens 133 to the projection surface is equal to or less than a predetermined threshold, that is, it is a special environment where the distance between the projection lens 133 and the projection surface is close.

[0017] 1, when the amount of heat calculated by heat amount calculation unit 111 exceeds a predetermined threshold, that is, when the degree of influence of the image on the amount of heat generated by projecting and displaying the image exceeds the predetermined threshold, image projection control unit 112 processes and projects no-signal projection image 121 stored (registered and specified) in storage unit 120 so that the degree of influence of the image on the amount of heat generated by projecting and displaying the image becomes equal to or less than the predetermined threshold. If the amount of heat is equal to or less than the predetermined threshold, image projection control unit 112 projects no-signal projection image 121 as is without processing it.

[0018] The storage unit 120 is composed of, for example, an EEPROM (Electrically Erasable Programmable Read-Only Memory) or a flash memory. The storage unit 120 stores a program 122 for controlling the projection system 100, setting values, a no-signal projection image 121, and the like. The program 122 includes a description (processing procedure) of the no-signal projection process (see FIG. 5 described later) executed by the projection image processing unit 110.

[0019] <No signal projection processing> 5 is a flowchart of the no-signal projection process when the power button according to this embodiment is pressed. The process of the projection image processing unit 110 when the input / output unit 140 is not receiving a projection image (when there is no signal) will be described with reference to FIG.

[0020] The projection system 100 can operate with either a battery power supply as a DC power supply or a power supply other than a battery power supply (commercial power supply as an AC power supply) as the main power supply. The power supply type detection unit (detection means) can detect whether or not the projection system is being driven by a battery power supply, for example, from the voltage value input from the power supply. Alternatively, when the projection system is being driven by a battery power supply, a pulse signal is output from the battery power supply, which is different from when the projection system is being driven by an AC power supply, and therefore it is possible to determine whether or not the projection system is being driven by a battery power supply. The result detected by the power supply type detection unit, which detects whether or not the projection system is being driven by a battery power supply, is acquired by an acquisition means.

[0021] When the projection system 100 is carried in a case such as a bag, it is assumed that it will operate on battery power as a DC power source as the primary power source, and it is unlikely that it will operate on anything other than battery power (commercial power as an AC power source). Therefore, only when the power source type detection unit detects that the projection system 100 is driven by a battery power source as the primary power source, it calculates the amount of heat when continuously projecting images to be projected when there is no signal, and if the calculated amount of heat is greater than a predetermined threshold, it executes control to reduce the amount of heat of the image when projecting the image so that it is equal to or less than the predetermined threshold.

[0022] Specifically, when the power button is pressed, first, in step S11, the image projection control unit 112 (projection control means) detects whether or not an image signal is input from the outside before the light source 131 (light source for projection) starts to light up. If it is detected that an image signal is being input from the outside (not that there is no signal) (step S11→NO), the process proceeds to step S16, where the image of the input signal is projected. If there is no image signal being input from the outside (step S11→YES), the process proceeds to step S12.

[0023] In step S12, the power supply type detection unit (detection means) detects whether the original power supply that drives the projection system 100 is a predetermined power supply, i.e., whether the projection system 100 is driven by a battery power supply as a DC power supply. If the power supply type detection unit (detection means) detects that the projection system 100 is driven by a power supply other than a battery power supply (a commercial power supply as an AC power supply) (step S12→NO), the process proceeds to step S16, and the no-signal projection image 121 is projected. If the power supply type detection unit (detection means) detects that the projection system 100 is driven by a battery power supply (step S12→YES), the process proceeds to step S13.

[0024] In step S13, the heat amount calculation unit 111 (determination means) uses formula (1) to calculate the amount of heat when projecting the no-signal projection image 121. That is, the heat amount calculation unit 111 (determination means) determines whether the degree of influence of the image projected and displayed when no image signal is input from the outside on the amount of heat generated by the image being projected and displayed is greater than a predetermined threshold value. In step S14, if the amount of heat calculated in step S13 is equal to or less than the threshold value (step S14→YES), the image projection control unit 112 proceeds to step S16, and if it exceeds the threshold value (step S14→NO), the image projection control unit 112 proceeds to step S15.

[0025] In step S15, the image projection control unit 112 (processing means) processes the no-signal projection image 121 so that the amount of heat is equal to or less than the threshold, and stores the processed image (processed no-signal projection image 121) in the storage unit 120. That is, when the degree of influence determined by the heat amount calculation unit 111 (determination means) is determined to be greater than a predetermined threshold, the image projection control unit 112 (processing means) processes the image so that the degree of influence is smaller, thereby generating a processed image. The processing technique will be described later with reference to FIGS. In step S16, the image projection control unit 112 projects the input image (if step S11→NO), the processed image (if step S14→NO), or the no-signal projection image 121 (if step S12→NO, step S14→YES).

[0026] <Example of processing projected images when no signal is present> Below, several methods are shown for the image projection control unit 112 (processing means) in step S15 to process the no-signal projection image 121. Fig. 6 is a diagram illustrating the no-signal projection image 121 according to this embodiment. The no-signal projection image 121 is an image in which the owner's company name is written in white letters on a plain background.

[0027] 7 is a diagram (1) illustrating a processed image 310 according to this embodiment. This processing method is a method for reducing the luminance of each pixel of the no-signal projection image 121. The image projection control unit 112 may reduce the luminance at a constant rate, or may reduce the luminance at a higher rate for pixels with higher luminance.

[0028] 8 is a diagram (2) illustrating a processed image 320 according to this embodiment. This processing method reduces the luminance of the pixel with the largest number of pixels of the same color. In the no-signal projection image 121, the background has the same color and the largest number of pixels (area), so the image projection control unit 112 reduces the luminance of the background.

[0029] 9 is a diagram (3) illustrating a processed image 330 according to this embodiment. This processing method reduces the luminance of pixels that have a luminance value higher than a predetermined luminance value among the pixels that make up the no-signal projection image 121. In the no-signal projection image 121, the luminance of the pixels that make up the company name in white characters is high, and the image projection control unit 112 reduces the luminance of the pixels of the company name.

[0030] 10 is a diagram (4) illustrating a processed image 340 according to this embodiment. This processing method is a method for reducing the no-signal projection image 121 and reducing the luminance of a part or all of the area other than the reduced image. The image projection control unit 112 reduces the no-signal projection image 121 to 1 / 2 and places it in the center, while reducing the luminance of the periphery to 0 (black).

[0031] 11 is a diagram (5) illustrating a processed image 350 according to this embodiment. This processing method is a method for reducing the luminance in a predetermined pattern area of ​​the no-signal projection image 121. The image projection control unit 112 reduces the luminance of the diamond pattern to 0 (black).

[0032] <Features of No Signal Projection Processing> The projection system 100 projects the no-signal projection image 121 when there is no signal and no projection image is input. More specifically, the projection system 100 calculates the amount of heat when projecting the no-signal projection image 121. If the amount of heat exceeds a predetermined threshold, the projection system 100 processes and projects the no-signal projection image 121 so that the amount of heat is equal to or less than the predetermined threshold. In other words, if the degree of influence of the image on the amount of heat generated by projecting and displaying the no-signal projection image 121 exceeds a predetermined threshold, the projection system 100 processes and projects the no-signal projection image 121 so that the degree of influence is equal to or less than the predetermined threshold.

[0033] It is sufficient that the degree of influence of the image processed by the processing means is smaller than the degree of influence of the original image, the no-signal projection image 121. Therefore, it is sufficient that the predetermined threshold value is smaller than the value of the degree of influence of the original image, the no-signal projection image 121. By doing so, even if the power button is turned on by mistake while the projection system 100 is in a bag and the no-signal projection image 121 is projected, the no-signal projection image 121 is processed and projected, so that the amount of heat generated is equal to or less than the predetermined threshold, and the amount of heat generated is suppressed.

[0034] Next, the following modified examples 1 to 3 will be described regarding a projection control means for controlling the projection of an image to be displayed so as to reduce the degree of influence when the determining means determines that the degree of influence is greater than a predetermined threshold value. <Modification 1: Projection with reduced light> In the above embodiment, when the amount of generated heat exceeds a threshold (i.e., when the degree of influence of an image on the amount of heat generated by projecting and displaying the image exceeds a predetermined threshold), the image projection control unit 112 processes and projects the no-signal projection image 121. The image projection control unit 112 may reduce the amount of light from the light source 131 before projecting.

[0035] 12 is a flowchart of the no-signal projection process when the power button is pressed according to Modification 1 of the present embodiment. The process of the projection image processing unit 110 in Modification 1 when the input / output unit 140 is not receiving a projection image (when there is no signal) will be described with reference to FIG. Steps S21 to S24 and S26 are similar to steps S11 to S14 and S16 shown in FIG. 5, respectively. In step S25, the image projection control unit 112 reduces the amount of light from the light source 131 so that the amount of heat generated when projecting the no-signal projection image 121 (i.e., the degree to which the image affects the amount of heat generated by projecting and displaying the image) is below a predetermined threshold.

[0036] By reducing the light amount of the light source 131, the image projection control unit 112 can reduce the amount of heat generated by the light source 131 itself and the amount of heat generated by the projection light to below a predetermined threshold. Compared to the above-mentioned embodiment, the amount of image processing can be reduced, and the load on the projection image processing unit 110 (main CPU) can be reduced.

[0037] <Variation 2: Alternating projection with black image> In the above embodiment, when the amount of heat generated exceeds a predetermined threshold (i.e., when the degree of influence of an image on the amount of heat generated by projecting and displaying the image exceeds a predetermined threshold), the image projection control unit 112 processes and projects the no-signal projection image 121. The image projection control unit 112 may project the no-signal projection image 121 and a black image (an image in which the previous pixel is black (luminance 0)).

[0038] 13 is a flowchart of the no-signal projection process when the power button is pressed according to Modification 2 of the present embodiment. The process of the projection image processing unit 110 in Modification 2 when the input / output unit 140 is not receiving a projection image (when there is no signal) will be described with reference to FIG.

[0039] Steps S31 and S32 are similar to steps S11 and S12, respectively, shown in FIG. In step S33, the heat amount calculation unit 111 calculates the heat amount when the no-signal projection image 121 is projected using formula (1). In step S34, if the amount of heat calculated in step S33 is equal to or less than a predetermined threshold (step S34→YES), the image projection control unit 112 proceeds to step S35, and if it exceeds the predetermined threshold (step S34→NO), the image projection control unit 112 proceeds to step S36.

[0040] In step S35, the image projection control unit 112 projects the no-signal projection image 121. In step S36, the image projection control unit 112 alternately projects the no-signal projection image 121 and a black image.

[0041] The image projection control unit 112 alternately projects the no-signal projection image 121 and a black image, thereby reducing the amount of heat generated from the projection light to a predetermined threshold or less. Compared to the above-described embodiment, in the second modification, the amount of image processing can be reduced, and the load on the projection image processing unit 110 (main CPU) can be reduced. In the second modification, the image projection control unit 112 may set the amount of light from the light source 131 to zero instead of projecting a black image. Also, the image is not limited to a black image, and may be an image that generates a small amount of heat.

[0042] <<Variation 3: Splitting and projecting the projection image when there is no signal>> In the above embodiment, when the amount of generated heat exceeds a predetermined threshold, the image projection control unit 112 processes and projects the no-signal projection image 121. The image projection control unit 112 may also divide the no-signal projection image 121 and project it.

[0043] Fig. 14 is a flowchart of the no-signal projection process when the power button is pressed according to Modification 3 of this embodiment. Fig. 15 is a diagram illustrating divided projection images 360, 370 according to Modification 3 of this embodiment. The process of the projection image processing unit 110 in Modification 3 when the input / output unit 140 is not receiving a projection image (when there is no signal) will be described with reference to Figs. 14 and 15.

[0044] Steps S41 to S45 are similar to steps S31 to S35 shown in FIG. In step S46, the image projection control unit 112 divides the no-signal projection image 121. The projection images 360, 370 shown in Fig. 14 are images obtained by dividing the no-signal projection image 121 into rectangular shapes. When the projection images 360, 370 are superimposed, excluding the black areas, the no-signal projection image 121 is restored. In step S46, the image projection control unit 112 divides the no-signal projection image 121 into the projection images 360, 370. In step S47, the image projection control unit 112 repeatedly projects the projection images 360 and 370 one by one.

[0045] Half of the projected images 360 and 370 are black, reducing the amount of heat generated by the projection light. The image projection control unit 112 alternately projects the projected images 360 and 370, thereby reducing the amount of heat generated by the projection light to a predetermined threshold or less. Furthermore, the areas filling the divided images (areas not included in the original image) are not limited to being black, and may be filled with pixels of low luminance. In the third modification, the image projection control unit 112 divides the no-signal projection image 121 into vertical strips, but may divide it into other shapes. Also, instead of dividing the no-signal projection image 121 into two images, the image projection control unit 112 may divide the no-signal projection image 121 into more images.

[0046] Other Modifications Although several embodiments and modifications of the present invention have been described above, these are merely examples and do not limit the technical scope of the present invention. For example, if the amount of heat generated by the light source 131 is low and negligible, the amount of heat may be calculated by setting S in formula (1) to 0. The present invention can take various other embodiments, and further, various modifications such as omissions and substitutions can be made without departing from the gist of the present invention. These embodiments and modifications are included in the scope and gist of the invention described in this specification, etc., and are included in the scope of the invention described in the claims and their equivalents.

[0047] The inventions described in the claims originally attached to this application are set forth below. The claim numbers in the appended claims are the same as those in the claims originally attached to this application.

[0048] <Additional Notes> 《Claim 1》 It is configured to be able to connect a commercial power source as an AC power source and a battery power source as a DC power source as the main power source for lighting the light source, a detection means for detecting whether the battery power source is connected as the primary power source; a determining means for determining whether or not an influence of an image projected and displayed in a state where no image signal is input from outside on the amount of heat generated by the image projected and displayed is greater than a predetermined threshold value when the detecting means detects that the battery power source is connected; a processing means for processing the image so as to reduce the degree of influence when the determining means determines that the degree of influence is greater than the predetermined threshold value, thereby generating a processed image; a projection control means for projecting and displaying the processed image generated by the processing means; 1. A projection system comprising: 《Claim 2》 It is configured to be able to connect a commercial power source as an AC power source and a battery power source as a DC power source as the main power source for lighting the light source, a detection means for detecting whether the battery power source is connected as the primary power source; a determining means for determining whether or not an influence of an image projected and displayed in a state where no image signal is input from outside on the amount of heat generated by the image projected and displayed is greater than a predetermined threshold value when the detecting means detects that the battery power source is connected; a projection control means for controlling the projection of the image so as to reduce the degree of influence when the determination means determines that the degree of influence is greater than the predetermined threshold value; and 1. A projection system comprising: 《Claim 3》 The heat quantity is an integrated value of the luminance 3. A projection system according to claim 1 or 2. 《Claim 4》 The heat quantity is a heat quantity on a predetermined unintended projection surface, The predetermined projection surface is located within a sealed space in which the projection system is placed, or within a space surrounded by a placement surface on which the projection system is placed and a peripheral side surface. 4. A projection system according to claim 1, wherein the projection system comprises: 《Claim 5》 The projection control means includes: Reduce the amount of light from the light source to project 3. The projection system of claim 2. 《Claim 6》 The projection control means includes: Dividing the image into a plurality of regions and projecting each of the regions one by one; When projecting the relevant area, the brightness of the area other than the relevant area is reduced. 3. The projection system of claim 2. 《Claim 7》 The projection control means includes: The image and an image whose heat amount is equal to or less than a predetermined threshold value when projected successively are alternately projected. 3. The projection system of claim 2. 《Claim 8》 The processing means is The image is processed so that the amount of heat when continuously projected is equal to or less than the predetermined threshold. 2. The projection system of claim 1 . 《Claim 9》 The processing means is The brightness of the pixels constituting the image is reduced and processed. 9. The projection system of claim 8. 《Claim 10》 The processing means is The image is processed by reducing the luminance of pixels that have a luminance value greater than a predetermined luminance value among the pixels that make up the image. 9. The projection system of claim 8. 《Claim 11》 The processing means is The luminance of the pixel with the largest number of pixels among the pixels of the same color that constitute the image is reduced and processed. 9. The projection system of claim 8. 《Claim 12》 The processing means is The image is reduced, and a part or all of the brightness in the area other than the reduced image is reduced and processed. 9. The projection system of claim 8. 《Claim 13》 The processing means is The image is processed by reducing the brightness of a predetermined pattern area. 9. The projection system of claim 8. 《Claim 14》 A projection unit is provided, A computer configured to be connectable to a commercial power source as an AC power source and a battery power source as a DC power source as a power source for lighting the light source of the projection unit, a detection means for detecting whether the battery power source is connected as the primary power source; a determining means for determining, when the detecting means detects that the battery power source is connected, whether or not a degree of influence of an image projected and displayed in a state where no image signal is input from the outside on the amount of heat generated by the image projected and displayed is greater than a predetermined threshold value; a processing means for processing the image so as to reduce the degree of influence, when the determination means determines that the degree of influence is greater than the predetermined threshold value, thereby generating a processed image; a projection control means for projecting and displaying the processed image generated by the processing means; A program to function as a 《Claim 15》 A projection control method for a control unit of a projection system configured to be connectable to a commercial power source as an AC power source and a battery power source as a DC power source as a main power source for lighting a light source, comprising: detecting whether the battery power source is connected as the primary power source; a step of determining whether or not an influence of an image projected and displayed in a state where no image signal is input from outside on the amount of heat generated by the image projected and displayed is greater than a predetermined threshold value when the battery power source is detected to be connected; generating a processed image by processing the image so as to reduce the degree of influence when it is determined that the degree of influence is greater than the predetermined threshold value; projecting and displaying the processed image; A projection control method comprising the steps of: [Explanation of symbols]

[0049] 100 Projection System 110 Projection image processing unit 111 Calorie calculation unit (judgment means) 112 Image projection control unit (projection control means, processing means) 120 Storage section 121 No signal projection image 122 Programs 140 Input / output section 310,320,330,340,350 Edited images 360,370 projected images

Claims

1. The light source is configured to be connectable to a commercial power source as an AC power source and a battery power source as a DC power source as a main power source for lighting the light source. a detection means for detecting whether the battery power source is connected as the primary power source; a determination means for determining, when the detection means detects that the battery power source is connected, whether or not an amount of heat generated on a predetermined projection surface by projecting and displaying an image on the predetermined projection surface when no image signal is input from the outside is greater than a predetermined threshold value; a processing means for processing the image so that the amount of heat becomes equal to or less than the predetermined threshold value when the determining means determines that the amount of heat is greater than the predetermined threshold value, thereby generating a processed image; a projection control means for projecting and displaying the processed image generated by the processing means; Equipped with The determination means derives the heat quantity based on the heat quantity emitted by the light source, the heat quantity of an image obtained by projecting pixels of a red component constituting the image, the heat quantity of an image obtained by projecting pixels of a green component constituting the image, and the heat quantity of an image obtained by projecting pixels of a blue component constituting the image.

1. A projection system comprising:

2. The light source is configured to be connectable to a commercial power source as an AC power source and a battery power source as a DC power source as a main power source for lighting the light source. a detection means for detecting whether the battery power source is connected as the primary power source; a determination means for determining, when the detection means detects that the battery power source is connected, whether or not an amount of heat generated on a predetermined projection surface by projecting and displaying an image on the predetermined projection surface when no image signal is input from the outside is greater than a predetermined threshold value; a projection control means for controlling the projection of the image to be displayed so that the amount of heat becomes equal to or less than the predetermined threshold value when the determination means determines that the amount of heat is greater than the predetermined threshold value; Equipped with The determination means derives the heat quantity based on the heat quantity emitted by the light source, the heat quantity of an image obtained by projecting pixels of a red component constituting the image, the heat quantity of an image obtained by projecting pixels of a green component constituting the image, and the heat quantity of an image obtained by projecting pixels of a blue component constituting the image.

1. A projection system comprising:

3. The predetermined projection surface is located within a sealed space in which the projection system is placed, or within a space surrounded by a placement surface on which the projection system is placed and a peripheral side surface.

3. A projection system according to claim 1 or 2.

4. The determination means: deriving a heat quantity of an image obtained by projecting a pixel for a red component constituting the image by multiplying a gamma function of the red component used for luminance correction at the time of projection by a first constant; deriving a heat quantity of an image obtained by projecting a pixel for a green component constituting the image by multiplying a gamma function of the green component used for luminance correction at the time of projection by a second constant; The heat quantity of an image obtained by projecting a pixel for a blue component constituting the image is derived by multiplying a gamma function of the blue component used for luminance correction during projection by a third constant.

3. A projection system according to claim 1 or 2.

5. The projection control means includes: Reduce the amount of light from the light source to project 3. The projection system of claim 2.

6. The projection control means includes: The image and an image whose heat amount is equal to or less than a predetermined threshold value when projected successively are alternately projected.

3. The projection system of claim 2.

7. The processing means is The image is processed so that the amount of heat when continuously projected is equal to or less than the predetermined threshold.

2. The projection system of claim 1.

8. The processing means is The brightness of the pixels constituting the image is reduced and processed.

8. The projection system of claim 7.

9. The processing means is The image is processed by reducing the luminance of pixels that have a luminance value greater than a predetermined luminance value among the pixels that make up the image.

8. The projection system of claim 7.

10. The processing means is The luminance of the pixel with the largest number of pixels among the pixels of the same color that constitute the image is reduced and processed.

8. The projection system of claim 7.

11. The processing means is The image is reduced, and a part or all of the brightness in the area other than the reduced image is reduced and processed.

8. The projection system of claim 7.

12. The processing means is The image is processed by reducing the brightness of a predetermined pattern area.

8. The projection system of claim 7.

13. A projection unit is provided, A computer configured to be connectable to a commercial power source as an AC power source and a battery power source as a DC power source as a main power source for lighting the light source of the projection unit, a detection means for detecting whether the battery power source is connected as the primary power source; a determination means for determining, when the detection means detects that the battery power source is connected, whether or not an amount of heat generated on a predetermined projection surface by an image projected and displayed on the predetermined projection surface in a state in which no image signal is input from the outside is greater than a predetermined threshold value; a processing means for processing the image so that the amount of heat becomes equal to or less than the predetermined threshold value when the determination means determines that the amount of heat is greater than the predetermined threshold value, thereby generating a processed image; a projection control means for projecting and displaying the processed image generated by the processing means; Function as a The determination means derives the heat quantity based on the heat quantity emitted by the light source, the heat quantity of an image obtained by projecting pixels of a red component constituting the image, the heat quantity of an image obtained by projecting pixels of a green component constituting the image, and the heat quantity of an image obtained by projecting pixels of a blue component constituting the image. program.

14. A projection control method for a control unit of a projection system configured to be connectable to a commercial power source as an AC power source and a battery power source as a DC power source as a main power source for lighting a light source, comprising: a detection step of detecting whether the battery power source is connected as the primary power source; a determination step of determining whether or not an amount of heat generated on a predetermined projection surface by projecting and displaying an image on a predetermined projection surface when no image signal is input from the outside is greater than a predetermined threshold value when the battery power source is detected to be connected; a generating step of generating a processed image by processing the image so that the amount of heat is equal to or less than the predetermined threshold when it is determined that the amount of heat is greater than the predetermined threshold; a projection step of projecting and displaying the processed image; Run The determining step derives the heat quantity based on the heat quantity emitted by the light source, the heat quantity of an image obtained by projecting pixels of a red component constituting the image, the heat quantity of an image obtained by projecting pixels of a green component constituting the image, and the heat quantity of an image obtained by projecting pixels of a blue component constituting the image. A projection control method comprising:

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