JP2013020146A - Video projection device, control method for a plurality of light source, and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video projection device capable of controlling the whole light quantity of a plurality of light sources according to set brightness of a projection video.SOLUTION: The video projection device has: input means for inputting a video signal; optical modulation means which modulates the video signal to an optical signal and generates a projection video; light source lighting means for controlling each of lighting states of a plurality of light sources; brightness adjustment means for adjusting the brightness of the projection video; and control means which controls the light source lighting means so as to increase the whole light quantity of the light sources when the brightness of the projection video set by the brightness adjustment means increases.

Description

  The present invention relates to a video projection apparatus capable of setting the brightness of a projected video.

  The projector projects the video signal input to the video terminal by modulating light from the lamp with liquid crystal or the like. A projector using two lamps is used with both lamps lit so that a bright projection image can be obtained. However, depending on the projection environment, only one lamp is lit to use the projector with reduced brightness. Is possible. By switching to projection using only one lamp, power consumption can be suppressed and the life of the lamp can be extended, and the fan speed can be reduced due to a decrease in the amount of heat generated, thereby reducing noise. For example, Patent Document 1 discloses a configuration of a conventional projector.

JP 2000-338601 A

  The brightness of the projected image is determined by a combination of the lighting state of each lamp and the operation mode. However, in a conventional projector, the brightness of the projection image set by the user is associated with the lighting state and operation mode of each lamp. Not.

  Therefore, the present invention can provide a video projection apparatus, a control method for a plurality of light sources, and a control program that can control the total light amount of the plurality of light sources in accordance with the brightness of the set projection image.

  An image projection apparatus according to an aspect of the present invention includes an input unit that inputs an image signal, an optical modulation unit that generates a projection image by modulating the image signal into an optical signal, and lighting states of a plurality of light sources. A light source lighting unit for controlling, a brightness adjusting unit for adjusting the brightness of the projection image, and a brightness of the projection image set by the brightness adjustment unit, the total light amount of the plurality of light sources Control means for controlling the light source lighting means so as to increase.

  An image projection apparatus according to another aspect of the present invention includes an input unit that inputs an image signal, an optical modulation unit that generates a projection image by modulating the image signal into an optical signal, and a light amount of each of a plurality of light sources. When the brightness of the projection image set by the brightness adjustment unit, the brightness adjustment unit for adjusting the brightness of the projection image, and the brightness adjustment unit increases, the total light amount of the plurality of light sources And a control means for controlling the light quantity control means so as to increase.

  According to another aspect of the present invention, a method for controlling a plurality of light sources includes a step of inputting a video signal, a step of generating a projection video by modulating the video signal into an optical signal, and a brightness adjusting unit. And controlling the lighting state of each of the plurality of light sources so that the total light quantity of the plurality of light sources increases when the brightness of the projection image increases.

  According to another aspect of the present invention, a method for controlling a plurality of light sources includes a step of inputting a video signal, a step of generating a projection video by modulating the video signal into an optical signal, and a brightness adjusting unit. And controlling the amount of light of each of the plurality of light sources so that the total amount of light of the plurality of light sources increases when the brightness of the projected image increases.

  A control program according to another aspect of the present invention is a control program that can be executed by a video projection apparatus including a plurality of light sources, the step of inputting a video signal, and the projection of the video signal modulated into an optical signal. When the brightness of the projection video set by the brightness adjusting unit and the step of generating the video increases, the lighting state of each of the plurality of light sources is controlled so that the total light quantity of the plurality of light sources increases. Steps.

  A control program according to another aspect of the present invention is a control program that can be executed by a video projection apparatus including a plurality of light sources, the step of inputting a video signal, and the projection of the video signal modulated into an optical signal. When the brightness of the projection image set by the brightness adjusting means and the step of generating an image increases, the light amount of each of the plurality of light sources is controlled so that the total light amount of the plurality of light sources increases. Steps.

  Other objects and features of the present invention are illustrated in the following examples.

  ADVANTAGE OF THE INVENTION According to this invention, the video projection apparatus which can control the whole light quantity of a some light source according to the brightness of the set projection image | video, the control method of a some light source, and a control program can be provided.

FIG. 3 is a configuration diagram of a projector in Embodiments 1 to 3. It is a figure which shows the combination of the lamp lighting control in Example 1, 4 and lamp light quantity control. It is a figure which shows the combination of the lamp lighting control and lamp light quantity control in Example 1. FIG. It is a figure which shows the lamp lighting control in Example 2. FIG. It is a figure which shows the lamp lighting control in Example 2. FIG. It is a figure which shows the combination of the lamp lighting control in Example 3, lamp light quantity control, and video signal brightness correction. It is a flowchart when setting the lamp lighting state and lamp light quantity in Example 3. It is a flowchart when setting the lamp lighting state and lamp light quantity in Example 3. FIG. 10 is a configuration diagram of a projector in Embodiment 4. It is a figure which shows the relationship between the lamp cumulative lighting time in Example 4, 5 and estimated lamp brightness. FIG. 10 is a configuration diagram of a projector in Embodiment 5. FIG. 10 is a configuration diagram of a projector in Embodiment 5.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same members are denoted by the same reference numerals, and redundant description is omitted.

  First, a projector (video projection apparatus) in Embodiment 1 of the present invention will be described. FIG. 1 is a configuration diagram of a projector in the present embodiment. As for the video signal, the type of the video signal input to the input terminal 101 (input means) is determined by the video input circuit 102 and output to the video processing circuit 103. When the input video signal is an analog signal, the video processing circuit 103 performs A / D conversion on the video signal and then outputs it to the video processing circuit 103. The video processing circuit 103 performs resolution conversion so that the resolution of the video signal matches the display panel 105, and performs various processes such as keystone correction.

  The output of the video processing circuit 103 is separated into red, blue, and green signals in the display circuit 104, and the display panel 105 is driven so that the output luminance characteristic becomes a desired characteristic with respect to the input gradation. The Incident light from each of the lamps 107 and 108 (a plurality of light sources) is condensed on the condensing unit 120, and the condensed light is incident on the display panel 105. Incident light from the condensing unit 120 to the display panel 105 is driven by the display circuit 104 so as to have a reflectance corresponding to the video signal (transmittance in the case of a transmissive projector), and passes through the projection lens group 106. And projected onto the screen 2. The display circuit 104 and the display panel 105 are light modulation means for generating a projected image by modulating a video signal into an optical signal.

  The lamp light quantity controllers 110 and 112 perform lighting control of the lamps 107 and 108 by switching between the normal mode and the eco mode based on a command from the controller 109. In this way, the lamp light quantity control units 110 and 112 are light quantity control means for controlling the light quantities of the lamps 107 and 108, respectively. The normal mode is a mode in which the lamps 107 and 108 are driven with the maximum driving power. The eco mode is a mode in which the driving power is reduced with respect to the driving power in the normal mode, and the incident light amount (lamp light amount) from each of the lamps 107 and 108 to the light collecting unit 120 is reduced and the power consumption is suppressed. . In the present embodiment, when the lamp light amount in the normal mode is not necessary due to the plurality of mode configurations, the light amount incident on the display panel 105 can be reduced and the power consumption can be suppressed by switching to the eco mode. The lamp light amount control units 110 and 112 are respectively in a normal mode (first state) that is a first light amount for each of the lamps 107 and 108 and an eco mode (first state) that is a second light amount smaller than the first light amount. 2 state), and the total light quantity of the lamps 107 and 108 is adjusted.

  Further, the controller 109 controls the lamp lighting control units 111 and 113 so as to switch between driving to turn on both the lamps 107 and 108 and driving to turn on one and turn off the other. When the lamp light amount by the two lamps 107 and 108 is not necessary, turning off one of the lamps 107 and 108 reduces the incident light amount (lamp light amount) to the display panel 105 and suppresses power consumption. be able to. In this manner, the lamp lighting states (on / off) of the lamps 107 and 108 can be switched by the lamp lighting control units 111 and 113, respectively. The lamp lighting control units 111 and 113 are light source lighting means for controlling the lighting states of the lamps 107 and 108, respectively.

  Further, the projector according to the present embodiment includes a brightness adjustment operation unit 114 (brightness adjustment means). The user can adjust the brightness of the projected video by operating the brightness adjustment operation unit 114. The controller 109 controls the lamp light amount control units 110 and 112 and the lamp lighting control units 111 and 113 in an integrated manner according to the set value by the brightness adjustment operation unit 114. At this time, the controller 109 (control means) controls the lighting state and light amount control state of each lamp in combination as shown in FIG. 2, for example, according to the set value by the brightness adjustment operation unit 114. Specifically, when the brightness of the projected image set by the brightness adjustment operation unit 114 increases, the controller 109 controls the lamp lighting control units 111 and 113 so that the total light amount of the lamps 107 and 108 increases. Control.

  FIG. 2 is a diagram showing a combination of lamp lighting control and lamp light quantity control in the present embodiment. In the present embodiment, the total light amount of the lamps 107 and 108 is controlled in five steps (five levels) by integrated control of the lamp light amount control units 110 and 112 and the lamp lighting control units 111 and 113. More specifically, when the projection light quantity is minimized (when it is the darkest), the lamp 107 is turned on in the eco mode and the lamp 108 is turned off. As described above, the on / off control and mode control of the lamps 107 and 108 change (increase) the projection light quantity stepwise, and when the projection light quantity is maximized (when it is brightest), both the lamps 107 and 108 are turned on. Turn on in normal mode.

  As illustrated in FIG. 2, the brightness adjustment operation unit 114 may display that power consumption, noise (fan rotation speed), life, and the like change according to the brightness setting value. When the brightness is set to be dark (when the projection light quantity is reduced), the power consumption is reduced, the noise (fan rotation speed) is reduced, and the life of the light source is increased. On the other hand, when the brightness is set to be bright (when the projection light quantity is increased), power consumption and noise increase, and the life of the light source is shortened.

  In the present embodiment, the controller 109 controls the lamp light amount control units 110 and 112 and the lamp lighting control units 111 and 113 based on the set value by the brightness adjustment operation unit 114. However, the present embodiment is not limited to this. For example, the brightness adjustment operation unit 114 may directly control the lamp light amount control units 110 and 112 and the lamp lighting control units 111 and 113 without using the controller 109.

  When only one of the lamps 107 and 108 is on, the lighting state of each lamp can be set according to the cumulative lighting time of each lamp in addition to a method of controlling lighting alternately at every setting or starting. The lighting state may be determined. Similarly, when one lamp is turned on in the normal mode and the other lamp is turned on in the eco mode, the light quantity control state of each lamp can be changed by changing the light quantity control state alternately at every setting or at startup. Alternatively, it may be determined by the cumulative lighting time of each lamp. For example, the remaining life of the two lamps is averaged by determining the lighting state and light intensity control state of the two lamps so that the lamps with short cumulative lighting time are preferentially turned on and preferentially driven in the normal mode. The lamp replacement time can be made the same, and the number of maintenance can be reduced. Alternatively, when only one of the lamps is in a lighting state, the lighting lamp may be selected so as to avoid a lamp that is not at a temperature at which lighting processing is possible, for example, immediately after the lamp is turned off. By performing the control as described above, each lamp can be set to an optimal lighting state and light amount control state by a simple UI (user interface) associated with brightness.

  In the lamp lighting control and lamp light quantity control shown in FIG. 2, the brightness when both the lamps 107 and 108 are driven in the eco mode is such that one lamp is driven in the normal mode and the other lamp is turned off. This is true if it is designed to be brighter than when When the brightness when one lamp is driven in the normal mode and the other lamp is turned off is brighter than when both lamps are driven in the eco mode, the control needs to be different from that in FIG. In this case, according to the set value of the brightness adjustment operation unit 114, the controller 109 performs lamp lighting control and lamp light amount control as shown in FIG. 3, for example. FIG. 3 is a diagram showing a combination of lamp lighting control and lamp light quantity control in this case. In the control of FIG. 3, the lamp lighting control and the lamp light quantity control at level 2 and level 3 are opposite to the control of FIG. With the above configuration, the effect of the present embodiment can be obtained.

  Next, a projector according to a second embodiment of the invention will be described. The basic configuration of the projector according to the present embodiment is the same as that of the projector according to the first embodiment shown in FIG. However, in the present embodiment, the lamp light amount control units 110 and 112 control the lamp light amounts to change continuously instead of switching the driving modes of the lamps 107 and 108 between the normal mode and the eco mode. .

  The controller 109 controls the lighting states of the lamps in combination as shown in FIG. 4, for example, according to the set value by the brightness adjustment operation unit 114. FIG. 4 is a diagram illustrating lamp lighting control in the present embodiment. The controller 109 controls the lamp light quantity control units 110 and 112 and the lamp lighting control units 111 and 113 based on the set value (brightness) of the brightness adjustment operation unit 114. Specifically, in accordance with the brightness setting value of the brightness adjustment operation unit 114, the light amount of the lamp that is lit and the lighting control of each lamp are performed so that the light amount of the entire lamp continuously changes. When the set brightness L is darker than the predetermined brightness Ls, the lamp 107 is turned on and the lamp 108 is turned off. When the set brightness L is brighter than the predetermined brightness Ls, both the lamps 107 and 108 are turned on.

  When the controller 109 controls the lamp lighting control units 111 and 113 so as to turn on only the lamp 107, the lamp light quantity control unit 110 continuously changes according to the set value (brightness) of the brightness adjustment operation unit 114. The amount of light of the lamp 107 is changed. In other words, the lamp light amount control unit 110 performs control so that the light amount of the lamp 107 continuously increases as the set value of the brightness adjustment operation unit 114 increases.

  When the controller 109 controls the lamp lighting control units 111 and 113 to turn on both the lamps 107 and 108, the lamp light amount control unit 110 makes the light amount of the lamp 107 constant (for example, a maximum value). Control. On the other hand, the lamp light amount control unit 112 continuously changes the light amount of the lamp 108 according to the set value (brightness) of the brightness adjustment operation unit 114. That is, the lamp light quantity control unit 110 performs control so that the light quantity of the lamp 108 increases continuously as the set value of the brightness adjustment operation unit 114 increases. By such control, the entire light quantity of the lamp can be continuously changed as shown in FIG.

  The controller 109 may control the lighting states of the lamps in combination as shown in FIG. 5, for example, according to the set value by the brightness adjustment operation unit 114. FIG. 5 is a diagram showing another form of lamp lighting control in the present embodiment.

  When the set brightness L is darker than the predetermined brightness Ls, the same control as in FIG. 4 is performed. On the other hand, when the set brightness L is brighter than the predetermined brightness Ls, both the lamps 107 and 108 are turned on. At this time, the lamp light amount control units 110 and 112 continuously change the light amounts of the lamps 107 and 108 according to the set value (brightness) of the brightness adjustment operation unit 114, respectively. That is, the lamp light amount control units 110 and 112 perform control so that the light amounts of both the lamps 107 and 108 continuously increase as the set value of the brightness adjustment operation unit 114 increases. Also by such control, the whole light quantity of the lamp can be continuously changed as shown in FIG.

  Next, a projector according to a third embodiment of the invention will be described. The basic configuration of the projector according to the present embodiment is the same as that of the projector according to the first embodiment shown in FIG. However, the video processing circuit 103 (video signal processing means) of this embodiment can perform video signal processing so as to reduce the brightness of the projected video. The controller 109 according to the present embodiment controls the lamp lighting control units 111 and 113, the lamp light amount control units 110 and 112, and the video processing circuit 103 according to the set value by the brightness adjustment operation unit 114, and performs appropriate projection. Set the light intensity. The lamp lighting control units 111 and 113 control the lamp lighting state, and the lamp light amount control units 110 and 112 control the lamp light amount in either the normal mode or the eco mode. In addition, the video processing circuit 103 performs video signal brightness correction by signal processing.

  In the projector of this embodiment, the lamp lighting state, the lamp light amount, and the video signal brightness correction are controlled in combination as shown in FIG. FIG. 6 is a diagram showing a combination of lamp lighting control, lamp light quantity control, and video signal brightness correction in the present embodiment.

  In this embodiment, the controller 109 adjusts the brightness of the video signal so as to correspond to a change in brightness that is smaller than the change in brightness of the lamp lighting state and the lamp light amount with respect to the adjustment of the brightness adjustment operation unit 114. Determine the correction value. Specifically, the controller 109 controls the video processing circuit 103 so that the video processing circuit 103 performs a desired video signal brightness correction (calculates a video signal brightness correction value). As described above, the controller 109 controls the lamp light amount control units 110 and 112, the lamp lighting control units 111 and 113, and the video processing circuit 103 in accordance with the set value (set brightness) of the brightness adjustment operation unit 114. Control. For this reason, as shown in FIG. 6, even when the lamp light quantity control units 110 and 112 control between the normal mode and the eco mode, the brightness of the projected image can be continuously changed.

  As shown in FIG. 6, when the setting value (brightness of the projected image) of the brightness adjustment operation unit 114 increases in the lamp lighting state and the lamp light amount within the respective ranges of levels 1 to 5, the image processing circuit 103. The brightness of the projected image is adjusted by the signal processing by. That is, the video processing circuit 103 controls the light modulation means (display circuit 104, display panel 105) so that the brightness of the projected video increases. In the present embodiment, the controller 109 controls the brightness of the projected video by a combination of the lamp lighting control units 111 and 113, the lamp light quantity control units 110 and 112, and the video processing circuit 103. As described above, in this embodiment, by performing brightness correction by signal processing by the video processing circuit 103 in addition to lamp lighting control and lamp light quantity control, it is possible to easily finely adjust the brightness of the projected video. Become. In this embodiment, the lamp light amount control by the lamp light amount control units 110 and 112 may not be performed. Even in the combination of the lamp lighting control units 111 and 113 and the video processing circuit 103, the brightness of the projected video can be continuously changed.

  In general, the lamp cannot be turned on unless the lamp falls below a certain temperature, and is not at a temperature at which the lamp can be lit immediately after it is turned off. There is a need. If the user uses the brightness adjustment operation unit 114 while looking at the projected image and trial and error, a large processing time is required, and it is desirable that the lighting state and the light amount be changed as little as possible. For this reason, at the time of brightness adjustment, for example, control is performed as shown in FIG.

  FIG. 7 is a flowchart for setting the lamp lighting state and the lamp light quantity in this embodiment. First, in step S101, the controller 109 determines whether or not the set value by the brightness adjustment operation unit 114 is accompanied by a change in lamp lighting state or lamp light quantity. When the lamp lighting state or the lamp light quantity is not changed, the controller 109 performs the video signal brightness correction setting in step S102. On the other hand, when the lamp lighting state or the lamp light amount is changed, the controller 109 displays a UI for inquiring the user whether the lamp lighting state or the lamp light amount can be changed in step S103. When the user permits the change, the controller 109 changes the lamp lighting state or the lamp light amount together with the video signal brightness correction in step S104. On the other hand, if the user does not permit this change, the controller 109 ends the setting flow without making this change.

  In general, when the brightness adjustment value can be set on the UI displayed on the screen using a remote controller or an operation panel, the brightness adjustment starts and ends when the dedicated UI starts and ends. The end is specified. Therefore, by controlling as in the flowchart shown in FIG. 8, changes in the lamp lighting state and the lamp light quantity can be minimized.

  FIG. 8 is a flowchart for setting the lamp lighting state and the lamp light quantity according to another embodiment of the present embodiment. First, in step S201, when the start of brightness adjustment is clearly indicated, the lamp lighting state and the lamp light amount that can output the maximum light amount of the projector are changed. The controller 109 sets the video signal brightness correction value in the video processing circuit 103 so that the brightness is the same as that at the start of the brightness adjustment with respect to the change of the lamp lighting state and the lamp light amount. Subsequently, in step S202, the controller 109 controls the projection light amount only by setting the video signal brightness correction value with respect to the setting of the brightness adjustment operation unit 114. That is, the controller 109 controls the projection light amount without changing the lamp lighting state and the lamp light amount. When the end of the brightness adjustment is clearly indicated, or when a certain time has elapsed after the end, the controller 109 determines the optimal lighting state of each lamp, the light amount of each lamp, and the video signal brightness. Set the correction value.

  When the brightness of the projected image is reduced, the controller 109 of this embodiment controls the lamp lighting control units 111 and 113 after controlling the light modulation means by the image processing circuit 103. By performing the control as described above, it is possible to set an optimal lamp lighting state and lamp light amount while minimizing changes in the lamp lighting state and lamp light amount.

  Next, a projector according to a fourth embodiment of the invention will be described. FIG. 9 is a configuration diagram of the projector in the present embodiment. The projector according to the present embodiment is different from the projector according to the first embodiment shown in FIG. 1 in that a lamp cumulative lighting time storage unit 115 (storage means) that stores the cumulative lighting times of the lamps 107 and 108 is stored. Since the other basic configuration is the same as that of the first embodiment, the description thereof is omitted.

  FIG. 10 is a diagram showing the relationship between the lamp cumulative lighting time and the estimated lamp brightness in this embodiment. In general, the brightness of the lamp decreases with the cumulative lighting time as shown in FIG. In this embodiment, the lamp cumulative lighting time is stored in the lamp cumulative lighting time storage unit 115. Then, the controller 109 performs processing for displaying a UI for notifying the user of the lamp life, processing for displaying a UI for prompting lamp replacement, and the like according to the value stored in the lamp cumulative lighting time storage unit 115.

  Further, when driving in the eco mode, the load on the lamp is small, and similarly, the deterioration of brightness is less than that in the normal mode. Therefore, compared to driving in the normal mode, the amount of addition due to the lighting time may be converted into a value smaller than the cumulative lighting time in the normal mode and integrated to obtain the lamp cumulative lighting time. When the lamp is replaced with a new one, the cumulative lighting time is reset to the initial value. In addition, if it is information which can estimate the extent of deterioration with respect to a new lamp, it may not be the lamp cumulative lighting time and can be estimated using other parameters.

  As shown in FIG. 10, the controller 109 can estimate the current brightness of each lamp based on the lamp cumulative lighting time stored in the lamp cumulative lighting time storage unit 115. Based on the estimated brightness of each lamp, the controller 109 drives both lamps 107 and 108 in the eco mode and drives one lamp in the normal mode to turn off the other lamp. Compare the brightness of the time. Here, if both lamps are brighter when driven in the eco mode, the controller 109, as shown in FIG. 2, sets the setting value of the brightness adjustment operation unit 114, the lamp light quantity control units 110 and 112, and the lamps. The lighting control units 111 and 113 are controlled in association with each other. On the other hand, when one of the lamps is off, the controller 109 is brighter, as shown in FIG. 3, the controller 109 sets the set value of the brightness adjustment operation unit 114, the lamp light quantity control units 110 and 112, and the lamp lighting. Control units 111 and 113 are associated with each other and controlled.

  As described above, the controller 109 acquires the brightness of each of the lamps 107 and 108, and changes the control method of the lamp lighting control units 111 and 113 and the lamp light amount control units 110 and 112 based on the acquired brightness. Specifically, the projector of this embodiment has a lamp cumulative lighting time storage unit 115 that stores the cumulative lighting times of the lamps 107 and 108, and the controller 109 stores the cumulative lighting time stored in the lamp cumulative lighting time storage unit 115. From the above, the brightness of the lamps 107 and 108 is estimated.

  According to the present embodiment, even when the order of brightness by the combination of the lighting state of the two lamps 107 and 108 and the light quantity control state depends on the lamp cumulative lighting time, the order of brightness of the projected light quantity of the two lamps is It is possible to effectively prevent replacement.

  Next, a projector according to a fifth embodiment of the invention will be described. FIG. 11 is a configuration diagram of the projector in the present embodiment. The projector according to the present embodiment includes a measuring unit 116 that measures incident light from the lamp 107 to the condensing unit 120 and a measuring unit 117 that measures incident light from the lamp 108 to the condensing unit 120. 1 is different from the projector of the first embodiment shown in FIG. Since the other basic configuration is the same as that of the first embodiment, the description thereof is omitted.

  In general, the brightness of the lamp decreases with the cumulative lighting time as shown in FIG. For this reason, in this embodiment, the controller 109 acquires the brightness of the lamp 107 measured by the measuring unit 116 and the brightness of the lamp 108 measured by the measuring unit 117, and the brightness of the lamps 107 and 108 is obtained. Each lamp is controlled based on the actual measurement value. As described above, the measuring units 116 and 117 are luminance measuring units that measure the luminance of the lamps 107 and 108, respectively, and the controller 109 determines the brightness of the lamps 107 and 108 based on the luminance measured by the measuring units 116 and 117. Get it. At the time of measurement of each lamp, the normal mode and the eco mode may be switched to measure each, or the other measurement value may be estimated from the measurement value of one lamp.

  Subsequently, the controller 109 determines the brightness when both the lamps 107 and 108 are driven in the eco mode and the brightness when one lamp is turned on and the other lamp is turned off based on the measurement values obtained by the measurement units 116 and 117. Compare brightness. Here, if both lamps are brighter when driven in the eco mode, the controller 109, as shown in FIG. 2, sets the setting value of the brightness adjustment operation unit 114, the lamp light quantity control units 110 and 112, and the lamps. The lighting control units 111 and 113 are controlled in association with each other. On the other hand, when one of the lamps is off, the controller 109 is brighter, as shown in FIG. 3, the controller 109 sets the set value of the brightness adjustment operation unit 114, the lamp light quantity control units 110 and 112, and the lamp lighting. Control units 111 and 113 are associated with each other and controlled.

  FIG. 12 is a configuration diagram of a projector according to another embodiment of the present embodiment. As shown in FIG. 12, instead of the measuring units 116 and 117, a measuring unit 118 (luminance measuring unit) that measures the amount of light at the subsequent stage of the light collecting unit 120 may be provided. In this case, the light quantity of each lamp can be measured by measuring the measurement value of the measurement unit 118 when one of the lamps to be measured is turned on and the other lamp is turned off. is there. Or, based on the measured value of the measuring unit 118 when both lamps are turned on and the measured value of the measuring unit 118 when one lamp is turned on and the other lamp is turned off, the calculation is performed for each lamp. The amount of light can also be measured. Such control may be configured such that each lamp is turned on with a time difference when the power is turned on, and the light amount is sequentially measured by the measurement unit 118.

  According to the present embodiment, even when the order of brightness by the combination of the lighting state of the two lamps 107 and 108 and the light quantity control state depends on the lamp cumulative lighting time, the order of brightness of the projected light quantity of the two lamps is It is possible to effectively prevent replacement.

  According to each of the above embodiments, it is possible to provide a video projection apparatus and a control method for a plurality of light sources that can control the total light quantity of the plurality of light sources in accordance with the brightness of the set projection video. Further, such a control method can be realized by a control program that can be executed by an image projection apparatus including a plurality of light sources.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

101: input terminal 103: video processing circuit 104: display circuit 109: controller 114: brightness adjustment operation unit

Claims (12)

An input means for inputting a video signal;
Light modulating means for modulating the video signal into an optical signal to generate a projected video;
Light source lighting means for controlling the lighting state of each of the plurality of light sources;
Brightness adjusting means for adjusting the brightness of the projected image;
Control means for controlling the light source lighting means so that the total light quantity of the plurality of light sources is increased when the brightness of the projection image set by the brightness adjustment means is increased. Video projection device. An input means for inputting a video signal;
Light modulating means for modulating the video signal into an optical signal to generate a projected video;
A light amount control means for controlling the light amount of each of the plurality of light sources;
Brightness adjusting means for adjusting the brightness of the projected image;
Control means for controlling the light quantity control means so that the total light quantity of the plurality of light sources is increased when the brightness of the projection image set by the brightness adjustment means is increased. Video projection device. A light amount control means for controlling the light amount of each of the plurality of light sources;
The control means controls the light source lighting means and the light quantity control means so that the total light quantity of the plurality of light sources increases when the brightness of the projection image set by the brightness adjustment means increases. The video projection apparatus according to claim 1, wherein: When the brightness of the projection video set by the brightness adjustment unit increases, the video signal processing unit further controls the light modulation unit so as to increase the brightness of the projection video,
The video projection apparatus according to claim 1, wherein the control unit controls the brightness of the projected video by a combination of the light source lighting unit and the video signal processing unit.   5. The video according to claim 4, wherein, when the brightness of the projection video is reduced, the control unit controls the light source lighting unit after controlling the light modulation unit by the video signal processing unit. 6. Projection device.   6. The control unit according to claim 3, wherein the control unit acquires brightness of the plurality of light sources and changes a control method of the light source lighting unit and the light amount control unit based on the acquired brightness. The video projection apparatus of any one of Claims. A storage means for storing cumulative lighting times of the plurality of light sources;
The video projection apparatus according to claim 6, wherein the control unit estimates brightness of the plurality of light sources from the cumulative lighting time stored in the storage unit. A luminance measuring means for measuring the luminance of the plurality of light sources;
The video projection apparatus according to claim 6, wherein the control unit obtains brightness of the plurality of light sources based on the luminance measured by the luminance measurement unit. Inputting a video signal;
Modulating the video signal into an optical signal to generate a projected video;
Controlling the lighting state of each of the plurality of light sources so that the total light quantity of the plurality of light sources is increased when the brightness of the projected video set by the brightness adjusting means is increased. A control method for a plurality of light sources. Inputting a video signal;
Modulating the video signal into an optical signal to generate a projected video;
And controlling the light quantity of each of the plurality of light sources so that the total light quantity of the plurality of light sources increases when the brightness of the projection image set by the brightness adjusting means increases. A control method for a plurality of light sources. A control program that can be executed by a video projection device including a plurality of light sources,
Inputting a video signal;
Modulating the video signal into an optical signal to generate a projected video;
Controlling the lighting state of each of the plurality of light sources so that the total light quantity of the plurality of light sources is increased when the brightness of the projected video set by the brightness adjusting means is increased. A characteristic control program. A control program that can be executed by a video projection device including a plurality of light sources,
Inputting a video signal;
Modulating the video signal into an optical signal to generate a projected video;
And controlling the light quantity of each of the plurality of light sources so that the total light quantity of the plurality of light sources increases when the brightness of the projection image set by the brightness adjusting means increases. A characteristic control program.