JP2012225978A - Projection type video display apparatus and multi-vision type video display apparatus - Google Patents

Abstract

An object of the present invention is to provide a projection display device capable of displaying an image with target luminance and target chromaticity even for a projection display device having a light source or the like used for a certain period. .
A projection display apparatus according to the present invention includes a light source 1, a light source characteristic storage means 9 for storing intrinsic light source characteristic data of the light source 1, and three primary color luminances as luminance sensors for measuring the luminance of the light source 1. Based on the sensor 8, the intrinsic light source characteristic data, and the temporal change in the luminance of the light source 1 measured by the three primary color luminance sensor 8, the characteristic data calculating means 18 for calculating the current light source characteristic data of the light source 1, and the current light source A correction coefficient calculation unit 15 that calculates a correction coefficient based on the characteristic data and a luminance and chromaticity correction unit 16 that corrects the luminance and chromaticity of the video signal using the correction coefficient are provided.
[Selection] Figure 1

Description

  The present invention relates to a projection-type video display device and a multi-vision projection-type video display device, and more particularly to a projection-type video display device that modulates the intensity of light from a light source using a video display device and projects a video signal on a screen. is there.

  Since the light source and the spectral member in the projection-type image display device have different characteristics for each product, the characteristic data indicating each characteristic is used to obtain the target luminance and target chromaticity for the video signal. It is necessary to determine the correction factor.

  When the light source or the spectral member is exchanged, it is necessary to change the correction coefficient for the video signal at the same time and adjust it so as to display the desired luminance and chromaticity on the screen.

  For example, regarding replacement of a light source, conventionally, in a projection type video display apparatus having a replaceable light source equipped with a light source characteristic storage unit, light source characteristic data of the replaced light source stored in the light source characteristic storage unit is set in advance. A projection-type video display device is known in which a correction coefficient is recalculated from the target luminance and target chromaticity data and displayed on the screen with the target luminance and target chromaticity (Patent Literature). 1).

Japanese Patent No. 4475886

  In the conventional configuration, the light source characteristic data held in the optical characteristic storage means is data indicating initial light source characteristics of each light source or the like.

  On the other hand, there has been a case where it is desired to change the target luminance and the target chromaticity after using the projection display apparatus for a certain period.

  If the initial light source characteristic data stored in the light source characteristic storage means differs from the current light source characteristic data used for a certain period due to changes in the light source over time, the initial light source characteristic data and the target luminance When the correction coefficient is calculated based on the target chromaticity data, there is a problem that the target luminance and target chromaticity cannot be corrected correctly.

  The present invention has been made to solve the above-described problems, and can display an image with target luminance and target chromaticity even on a projection display device having a light source or the like used for a certain period. An object of the present invention is to provide a projection display device that can be used.

  The projection display apparatus according to the present invention includes a light source, a light source characteristic storage unit that stores specific light source characteristic data that is light source characteristic data unique to the light source, a luminance sensor that measures the luminance of the light source, and the specific light source. Characteristic data calculating means for calculating current light source characteristic data indicating a current light source characteristic of the light source based on characteristic data and a change in luminance of the light source measured by the luminance sensor; and the current light source characteristic data And correction coefficient calculation means for calculating a correction coefficient for displaying a video with a preset target luminance and target chromaticity, and correction of the luminance and chromaticity of the video signal using the correction coefficient Luminance and chromaticity correction means, and a video display device that projects the video using the corrected video signal and light incident from the light source. And features.

  A multi-vision projection display apparatus according to the present invention includes a plurality of the projection display apparatuses, and sets the target luminance and the target chromaticity common to the projection display apparatuses. To do.

  According to the projection type image display apparatus of the present invention, the light source, the light source characteristic storage means for storing the specific light source characteristic data which is the light source characteristic data specific to the light source, the luminance sensor for measuring the luminance of the light source, Characteristic data calculating means for calculating current light source characteristic data indicating a current light source characteristic of the light source based on intrinsic light source characteristic data and a change in luminance of the light source measured by the luminance sensor, and the current light source Based on the characteristic data, correction coefficient calculation means for calculating a correction coefficient for displaying a video with preset target luminance and target chromaticity, and correction of luminance and chromaticity for the video signal using the correction coefficient Brightness and chromaticity correction means, and the video display device that projects the video using the corrected video signal and the light incident from the light source. It allows calculating a correction coefficient according to the change over time in the light source, it is possible to display an image at the target luminance and the target chromaticity.

  In addition, according to the multi-vision projection type video display device according to the present invention, by providing a plurality of the projection type video display devices, and setting the common target luminance and the target chromaticity in each projection type video display device. The brightness and chromaticity can be adjusted among a plurality of projection type video display devices, and an appropriate video can be displayed as a whole.

1 is a diagram illustrating an outline of a projection display apparatus according to a first embodiment. It is a figure which shows an example of the spectral sensitivity characteristic of each color of a 3 primary color luminance sensor. It is a figure which shows an example of the radiation intensity spectrum of a light source. It is a figure which shows an example of the target color reproduction range. It is a figure which shows the outline of the multivision projection type video display apparatus concerning Embodiment 2. FIG.

<A. Embodiment 1>
<A-1. Configuration>
FIG. 1 is a diagram showing an outline of a projection display apparatus according to the present invention. In FIG. 1, output light from a light source 1 such as a lamp is supplied to a spectral member 2 formed of a rotating color filter called a color wheel, and is converted into red (R), green (G), and blue (B) colors. Spectroscopy in time division. The light transmitted through the spectral member 2 is incident on the video display device 5 through the mirror 4 after the spatial luminance distribution is smoothed by the optical integrator 3.

  On the other hand, the video signal input from the outside is input to the luminance and chromaticity correction means 16 and is input to the driver 17 after undergoing luminance and chromaticity correction described later. The driver 17 performs signal conversion into a signal format required by the video display device 5 and outputs a signal to the video display device 5.

  The video display device 5 is configured by, for example, a DMD (Digital Micromirror Device). When the DMD is in an on-state, the DMD modulates the intensity of light from the optical integrator 3 according to the input signal, and passes through the projection lens 6. The image is displayed by being projected onto the screen 7.

  On the other hand, when the DMD is in the off state, the DMD reflects the light from the optical integrator 3 in the direction of the three primary color luminance sensor 8 as a luminance sensor. This DMD off-state is always present in the period of the vertical synchronizing signal of the video signal and in the period in which the light is divided into red (R), green (G), and blue (B) by the spectral member 2 in a time-division manner. Therefore, the reflected light is incident on the three primary color luminance sensor 8 so that the luminance change of each of the red (R), green (G), and blue (B) color components of the light source 1 can be monitored almost always. . Here, the three primary color luminance sensors have spectral sensitivity characteristics as shown in FIG. 2, for example, and output incident light as RGB luminance data. FIG. 2 shows the spectral sensitivity characteristics of the three primary color luminance sensors, with the horizontal axis representing the wavelength (nm) and the vertical axis representing the relative value.

The radiation intensity spectrum S ₀ (λ) of the light source 1 is stored in advance in the light source characteristic storage means 9 as inherent light source characteristic data. The radiation intensity spectrum S ₀ (λ) as the intrinsic light source characteristic data is, for example, a radiation intensity spectrum at the start of use of the light source 1, and is a spectrum unique to each light source.

  The light source characteristic storage means 9 is composed of, for example, an EEPROM (Electrically Erasable Programmable Read-Only Memory) which is a non-volatile memory, and can retain the stored contents even when there is no power supply. The light source characteristic storage means 9 integrally constitutes a lamp cartridge 10 so that it can be exchanged together with the light source 1.

  The red, green, and blue transmission characteristics Tr (λ), Tg (λ), and Tb (λ) of the RGB filters of the spectral member 2 are stored in the spectral member characteristic storage unit 11 in advance as spectral member characteristic data. Yes. The spectral member characteristic storage means 11 is also composed of, for example, an EEPROM which is a nonvolatile memory, and can retain the stored contents even when there is no power supply. The spectral member characteristic storage unit 11 integrally constitutes a color wheel unit 12 so that it can be exchanged together with the spectral member 2.

  Optical characteristic data representing optical characteristics O (λ) other than the light source 1 and the spectral member 2 in the projection type image display device is stored in the optical characteristic storage means 13.

The characteristic data calculation unit 18 stores the radiation intensity spectrum S ₀ (λ) as the intrinsic light source characteristic data before aging of the light source 1 stored in the light source characteristic storage unit 9 and the three primary color luminance sensors 8 before aging of the light source. The RGB luminance data Sr ₀ , Sg ₀ , Sb _{0 of} each of the red (R), green (G), and blue (B) colors and the current RGB luminance data Sr, Sg, Sb of the three primary color luminance sensors 8 The radiation intensity spectrum S (λ) as the current light source characteristic data indicating the current light source characteristic of 1 can be predicted as shown in FIG.

For the prediction, for example, the following equation (1) is used. In FIG. 3, the spectrum indicated by the dotted line is the initial radiant intensity spectrum S ₀ (λ), and the spectrum indicated by the solid line is the expected radiant intensity spectrum S (λ). The horizontal axis indicates the wavelength (nm) and the vertical axis indicates the relative value.

  In the expression (1), the visible light wavelength range is 380 nm to 780 nm, the red (R) sensitivity wavelength range of the three primary color luminance sensor 8 is 610 nm or more, the green (G) sensitivity wavelength range is 490 nm to 610 nm, and the blue (B) The sensitivity wavelength range is set to 490 nm or less.

  The current light source characteristic data obtained by the equation (1), that is, the radiation intensity spectrum S (λ), the spectral member characteristic data stored in the spectral member characteristic storage unit 11, and the optical characteristic stored in the optical characteristic storage unit 13. The data is supplied to the characteristic coefficient calculation means 14.

  In the characteristic coefficient calculating means 14, the radiation intensity spectrum S (λ) obtained by the equation (1) and the red, green and blue transmission characteristics Tr (λ) and Tg (Tg ( λ), Tb (λ), and optical characteristics data other than the light source and the spectral member O (λ), which are optical characteristic data, are expressed by the following formula (2) as characteristic coefficients XLr, YLr, ZLr, XLg, YLg, ZLg, XLb, YLb, and ZLb are respectively obtained.

  In Expression (2), Kx, Ky, and Kz are predetermined constants, x (λ), y (λ), and z (λ) are color matching functions, and θr, θg, and θb are the colors of the rotating color filter of the spectral member 2. This is the effective split angle of the component. These data are stored in the memory 14 a in the characteristic coefficient calculation means 14. Here, the color matching function represents a spectral sensitivity curve of the human eye with respect to the equal energy spectrum.

  The characteristic coefficients XLr, YLr, ZLr, XLg, YLg, ZLg, XLb, YLb, ZLb obtained by the characteristic coefficient calculating means 14 are supplied to the correction coefficient calculating means 15 and further to the luminance and chromaticity correcting means 16.

  The correction coefficient calculation means 15 receives data representing target luminance and target chromaticity Ct set from the outside using serial communication, an infrared remote controller, a wireless device, or the like.

  For example, as shown in FIG. 4, the target luminance and the target chromaticity Ct are expressed by a triangular color reproduction range having Rt, Gt, and Bt as vertices, and Rt is the tristimulus values Xrt, Yrt, and Zrt. Gt is represented by the tristimulus values Xgt, Ygt, and Zgt, and Bt is represented by the tristimulus values Xbt, Ybt, and Zbt. In FIG. 4, R, G, and B represent the vertices of the triangular color reproduction range when correction is not performed.

  The correction coefficient calculation means 15 uses the target luminance and target chromaticity Ct and the characteristic coefficients XLr, YLr, ZLr, XLg, YLg, ZLg, XLb, YLb, ZLb, and the correction coefficients Xtr, Ytr, Ztr, Xtg, Ytg, Ztg, Xtb, Ytb, Ztb are obtained. A specific calculation method for obtaining the correction coefficient will be described later.

  In the luminance and chromaticity correction means 16, the input signal D, correction coefficients Xtr, Ytr, Ztr, Xtg, Ytg, Ztg, Xtb, Ytb, Ztb, characteristic coefficients XLr, YLr, ZLr, XLg, YLg, ZLg, XLb, YLb , ZLb, the following equation (3) is calculated, and signals representing the tristimulus values Xc, Yc, Zc obtained by this calculation are generated. In Expression (3), α, β, and γ represent the strengths of the three primary colors, red (R), green (G), and blue (B) in the display color represented by the input video signal.

  The luminance and chromaticity correction unit 16 further converts the signal representing the tristimulus values into signals Er, Eg, and Eb representing the R, G, and B color components and outputs the signals. The driver 17 receives the signals Er, Eg, and Eb and generates drive signals Fr, Fg, and Fb corresponding to the signals Er, Eg, and Eb, thereby driving the video display device 5.

  Hereinafter, the calculations in the characteristic coefficient calculation unit 14, the correction coefficient calculation unit 15, and the luminance and chromaticity correction unit 16 will be described in more detail. Here, a display device of an additive color mixture model in which the following formula (4) is established is assumed.

  In Expression (4), Xa, Ya, and Za represent tristimulus values of colors corresponding to the mixing ratio of the three primary colors R, G, and B in the display color. XLr, YLr, ZLr, XLg, YLg, ZLg, XLb, YLb, and ZLb are characteristic coefficients of the display device.

  The ratio of α, β, and γ to the maximum value in the range of possible values of the signal representing the R, G, and B components (for example, the signal representing each of the R, G, and B components is in the range of 0 to 255) When the values of R, G, and B are expressed by the ratio of the signal values of the R, G, and B components to “255”, XLr, YLr, and ZLr are tristimulus values for displaying the primary color R. be equivalent to. XLg, YLg, and ZLg are equal to the tristimulus values when displaying the primary color G. XLb, YLb, and ZLb are equal to tristimulus values when displaying the primary color B. Hereinafter, the case where α, β, and γ are each expressed as a ratio to the maximum value as described above will be described.

  Equation (4) indicates that when a certain color signal (α, β, γ) is input to a display device having a certain characteristic (M), the tristimulus values of the display color of the color displayed at that time are Xa, Ya , Za. As shown in Expression (4), the color space of the display device in which the additive color mixture is established is a linear space in which each display color is obtained by the linear sum of the tristimulus values XYZ of the three primary colors “R, G, B”.

  When the input signal is subjected to correction for generating the target luminance and the target chromaticity, the relationship between the input signal and the display color is expressed by Expression (3).

  In Expression (3), the components Xtr, Ytr, Ztr, Xtg, Ytg, Ztg, Xtb, Ytb, and Ztb of the second matrix on the right side are correction coefficients, and are determined as follows, for example.

  As described above, it is assumed that the target color reproduction range Ct is represented by a triangle having vertices Rt, Gt, and Bt as shown in FIG. When the tristimulus values of Rt are Xrt, Yrt, and Zrt, the following equation (5) is established.

  When the second matrix and the third matrix on the right side of Expression (5) are rearranged, the following Expression (6) is obtained.

  The following equation (7) can be obtained by modifying the equation (6).

  The following formulas (8) and (9) are obtained in the same manner as formula (7).

  In Expressions (8) and (9), Xgt, Ygt, and Zgt are Gt tristimulus values, and Xbt, Ybt, and Zbt are Bt tristimulus values. Nine coefficients constituting the second matrix on the right side of Expression (3) are obtained from Expression (7), Expression (8), and Expression (9).

  The correction coefficient calculation means 15 in FIG. 1 is provided with target luminance and target chromaticity Ct (Xrt, Yrt, Zrt, Xgt, Ygt, Zgt, Xbt, Ybt, Zbt) from the outside, and characteristic coefficients XLr, YLr, ZLr, XLg, YLg, ZLg, XLb, YLb, and ZLb are given from the characteristic coefficient calculation means 14. Based on these, the calculations of Expressions (7), (8), and (9) are performed to obtain correction coefficients Xtr, Ytr, Ztr, Xtg, Ytg, Ztg, Xtb, Ytb, and Ztb.

  1 receives correction coefficients Xtr, Ytr, Ztr, Xtg, Ytg, Ztg, Xtb, Ytb, Ztb from the correction coefficient calculation means 15, and receives input signals D (α, β, γ). Furthermore, the characteristic coefficients XLr, YLr, ZLr, XLg, YLg, ZLg, XLb, YLb, ZLb are received from the characteristic coefficient calculating means 14. With respect to these, the calculation of the above equation (3) is performed to obtain Xc, Yc, Zc, and further converted into signals Er, Eg, Eb of the R, G, B components, which are converted into the driver 17. To supply.

  The driver 17 generates drive signals Fr, Fg, and Fb corresponding to the signals Er, Eg, and Eb, and modulates the video display device 5 thereby, so that the luminance and chromaticity are almost targeted on the screen 7. An image corrected to the value is obtained.

  As described above, the current light source characteristic data is estimated from the intrinsic light source characteristic data held in the light source characteristic storage means 9 incorporated in the light source 1 and the luminance change of the light source 1 measured by the three primary color luminance sensor 8. Can do.

  Based on the current light source characteristic data and the spectral member characteristic data held in the spectral member characteristic storage means 11, a correction coefficient for generating the target luminance and the target chromaticity Ct can be automatically obtained. It is possible to display an image corrected so as to achieve the luminance and target chromaticity.

  On the other hand, since the specific light source characteristic data held in the light source characteristic storage unit 9 differs from the current light source characteristic data due to changes over time, when the correction coefficient is calculated based on the specific light source characteristic data, the target luminance is correctly set. In addition, it is not possible to display an image corrected to achieve the target chromaticity.

  Further, by always storing the estimated current light source characteristic data in the light source characteristic storage means 9, even if the light source 1 after the change with time is used in another projection type video display device, it is based on the current light source characteristic data. An image that achieves the target luminance and the target chromaticity can be displayed. In addition, when another projection type video display device using the light source 1 includes a luminance sensor corresponding to the three primary color luminance sensors 8 and can refer to RGB luminance data, the projection type video display device is used for the other projection type video display device. Thus, an appropriate correction coefficient can be calculated even with respect to a change with time.

  Further, even when the light source 1 or the spectral member 2 (or both) is replaced with a new one, the intrinsic light source characteristic data in the light source characteristic storage means 9 corresponding to the replaced light source 1 or the spectral member characteristics corresponding to the spectral member 2 By referring to the spectral member characteristic data in the storage unit 11, a correction coefficient corresponding to the characteristic of each product can be automatically obtained.

  If an identification code or the like for each part is assigned to the storage means attached to the light source 1 or the spectroscopic member 2 serving as a replacement part, it is automatically determined that the replacement has been made due to the difference in the identification code. It is also easy to automate the adjustment of chromaticity.

  It is also possible to visually adjust appropriate luminance and chromaticity by changing the correction coefficient while viewing the video displayed on the screen 7 without inputting the target luminance chromaticity as data.

  In this case, the target luminance and the target chromaticity Ct can be calculated back by using the correction coefficient that can be changed, the current light source characteristic data, the spectral member characteristic data, and the optical characteristic data (formulas). (See (3)). Even in such a case, the luminance and chromaticity can be appropriately adjusted when the light source 1 changes over time or the light source 1 and / or the spectral member 2 is replaced.

  In the above embodiment, the light source characteristic storage unit 9 and the spectral member characteristic storage unit 11 store the radiation intensity spectrum and the transmittance at each wavelength, respectively. However, the color specification represented by the XYZ color system or the like is used. There is no particular limitation as long as the tristimulus value of the system can be calculated.

  In the present embodiment, the light source 1 and the spectroscopic member 2 are each provided with a storage means. However, the storage means may be provided only for the light source 1 depending on variations in characteristics.

<A-2. Effect>
According to the embodiment of the present invention, in the projection type image display device, the light source 1, the light source characteristic storage means 9 that holds the intrinsic light source characteristic data of the light source 1, and the luminance sensor that measures the luminance of the light source 1 are used. Three primary color luminance sensors 8, characteristic light source characteristic data, and characteristic data calculation means 18 for calculating the current light source characteristic data of the light source 1 based on the temporal change of the luminance of the light source 1 measured by the three primary color luminance sensor 8. A correction coefficient calculation means 15 for calculating a correction coefficient based on the current light source characteristic data, and a luminance and chromaticity correction means 16 for correcting the luminance and chromaticity of the video signal using the correction coefficient, Even if the luminance and chromaticity of the light source 1 change with time, a correction coefficient can be calculated in accordance with the change, and an image can be displayed so as to achieve the target luminance and target chromaticity.

  According to the embodiment of the present invention, in the projection display apparatus, the light source 1 and the light source characteristic storage means 9 are provided in an integrally replaceable manner, so that even when the light source is replaced. By referring to the light source characteristic storage means 9 that stores the light source characteristic specific to the light source, it is possible to calculate a correction coefficient that takes into account the change over time.

  Further, according to the embodiment of the present invention, in the projection type video display device, the video is displayed in a mode in which the correction coefficient can be changed, and the correction coefficient when the video becomes a specific display is designated, A correction coefficient, current light source characteristic data, spectral member characteristic data, and optical characteristic data that can be changed by setting target luminance and target chromaticity corresponding to the specified correction coefficient. Thus, the target luminance and the target chromaticity Ct can be calculated backward.

  Further, according to the embodiment of the present invention, in the projection type video display device, the spectral member 2 that splits the light incident from the light source 1 and enters the video display device 5 and the characteristic data of the spectral member 2 are used. A spectral member characteristic storage unit 11 for holding certain spectral member characteristic data; and a correction coefficient calculation unit 15 that captures an image with a target luminance and a target chromaticity based on the current light source characteristic data and the spectral member characteristic data. By calculating the correction coefficient for display, the correction coefficient can be calculated in consideration of the spectral member characteristic data of the spectral member 2.

<B. Second Embodiment>
<B-1. Configuration>
In the second embodiment, a multi-vision projection-type video display device formed by combining a plurality of projection-type video display devices described in the first embodiment will be described.

  FIG. 5 is a diagram showing, as an example, a multivision projection type video display device in which two projection type video display devices are combined.

  In FIG. 5, a first projection type video display device 111 and a second projection type video display device 112 are combined to form a multivision projection type video display device. The first projection display apparatus 111 and the second projection display apparatus 112 receive a common target luminance and target chromaticity Ct, and operate in the same manner as described in the first embodiment, respectively. A correction coefficient is calculated so as to obtain luminance and target chromaticity.

  For example, even when the first projection display apparatus 111 and the second projection display apparatus 112 include light sources that have started to be used at different timings, a common target for a plurality of projection display apparatuses By giving values (target luminance and target chromaticity), it is possible to correct the target luminance and target chromaticity in each projection type video display device, and to keep the luminance and chromaticity between a plurality of screens uniform.

  In addition, even when the light source of the first projection type video display device 111 or the second projection type video display device 112 or both is replaced with a new light source, the inherent light source characteristic data is stored from the light source characteristic storage means 9 after the replacement. By automatically calculating the correction coefficient with reference to, it is possible to correct the target luminance and chromaticity, and the uniformity of the luminance and chromaticity is maintained among the screens of a plurality of projection type video display devices.

  In the second embodiment, the multi-vision system with two screens has been described. However, the number of screens is not particularly limited.

  The target luminance and the target chromaticity Ct may be input to each projection type video display device from the outside with a computer or the like, or may be input to each projection type video display device with an infrared remote controller or the like.

<B-2. Effect>
According to the embodiment of the present invention, the multi-vision projection type video display device includes a plurality of the projection type video display devices described in the first embodiment, and the target brightness and the target color common to each projection type video display device. By setting the degree, uniformity of luminance and chromaticity can be maintained between the screens of a plurality of projection type video display devices.

  DESCRIPTION OF SYMBOLS 1 Light source, 2 Spectroscopic member, 3 Optical integrator, 4 Mirror, 5 Image display device, 6 Projection lens, 7 Screen, 8 Three primary color luminance sensor, 9 Light source characteristic storage means, 10 Lamp cartridge, 11 Spectral member characteristic storage means, 12 Color wheel unit, 13 optical characteristic storage means, 14 characteristic coefficient calculation means, 14a memory, 15 correction coefficient calculation means, 16 brightness and chromaticity correction means, 17 driver, 18 characteristic data calculation means, 111 first projection type image display 112, a second projection type image display device.

Claims (6)

A light source;
Light source characteristic storage means for holding unique light source characteristic data which is light source characteristic data unique to the light source;
A luminance sensor for measuring the luminance of the light source;
A characteristic data calculation means for calculating current light source characteristic data indicating a current light source characteristic of the light source based on the intrinsic light source characteristic data and a change in luminance of the light source measured by the luminance sensor;
Correction coefficient calculation means for calculating a correction coefficient for displaying an image with preset target luminance and target chromaticity based on the current light source characteristic data;
Luminance and chromaticity correction means for correcting the luminance and chromaticity of the video signal using the correction coefficient;
A video display device that projects the video using the corrected video signal and light incident from the light source,
Projection-type image display device. The light source and the light source characteristic storage means are provided in an integrally exchangeable manner,
The projection type image display device according to claim 1. The video is displayed in a manner in which the correction coefficient can be changed, the correction coefficient when the video is in a specific display is designated, and the target luminance and the target color are corresponding to the designated correction coefficient. The degree is set,
The projection type video display apparatus according to claim 1 or 2. A spectroscopic member that splits light incident from the light source and enters the image display device;
A spectral member characteristic storage means for holding spectral member characteristic data which is characteristic data of the spectral member;
The correction coefficient calculation means calculates a correction coefficient for displaying the video with the target luminance and the target chromaticity based on the current light source characteristic data and the spectral member characteristic data. ,
The projection type video display device according to claim 1. The spectroscopic member and the spectroscopic member characteristic storage means are provided in an integrally exchangeable manner,
The projection type video display device according to claim 1. A plurality of the projection-type image display devices according to any one of claims 1 to 5,
The common target brightness and the target chromaticity are set in each projection type video display device,
Multi-vision projection type image display device.

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