JP2007147852A - Multi-screen display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform automatic adjustment of reducing the differences of luminance and chromaticity between projection type display devices when constituting a multi-screen display device by combining the projection type display devices having different display characteristics. <P>SOLUTION: A master projection type display device 2m and a slave projection type display device 2s respectively have memories 11m and 11s for storing luminance/chromaticity data obtained by colorimetry when manufacturing, and the master device 2m obtains the luminance/chromaticity data DSTs of the slave device 2s from a communication cable 16, and arithmetically calculates the target luminance/chromaticity value Ct of the multi-screen display device 1. The target luminance/chromaticity value Ct is supplied to the slave device 2s through the communication cable 16. In the respective projection type display devices 2m and 2s, luminance/chromaticity correction factors CCGm and CCGs for the target luminance/chromaticity value Ct are arithmetically calculated to correct video signals DVSm and DVSs from the outside, whereby a multi-screen is adjusted to have the target luminance and chromaticity value. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a multi-screen display device that forms a larger display screen by combining the screens of a plurality of projection-type display devices, and in particular, automates operations for adjusting brightness and chromaticity when installing a multi-screen display device. The present invention relates to a multi-screen display device capable of performing the above.

  Projection type display devices have different characteristics for each product due to differences in light sources and spectral members. Therefore, when installing a multi-screen display device composed of a plurality of these, the brightness of the screen displayed between the projection display devices Therefore, it is necessary to adjust each projection type display device so as to reduce the difference in color.

In an example of a conventional multi-screen display device, after the installation, the adjuster adjusts the luminance / chromaticity of the multi-screen by operating the luminance / chromaticity conversion unit of each projection-type display device by visual sensation. In addition, after installing a multi-screen display device, the display color of each projection display device is measured by a sensor built in the projection display device, and there is also a device that corrects to a desired chromaticity by a colorimetric value (for example, patent Reference 1).
Japanese Patent Laid-Open No. 10-90645 (page 3-5, FIG. 1)

  In the adjustment based on the visual sensation of the adjuster as described above, there are problems in that the finish varies depending on the skill level of the adjuster and the adjustment time varies. In addition, after the multi-screen display device is installed, the display color of each projection display device is measured by a sensor built in the projection display device, and the method of correcting to a desired chromaticity by the colorimetric value is a multi-screen display device. It is necessary to provide a high-precision sensor for all the projection display devices that make up the projector, and this is expensive, and the desired chromaticity is outside the color reproducible range of the projection display device used. There was a case.

  The present invention solves the above problems and provides a multi-screen display device that automatically adjusts so that the difference in luminance and chromaticity between projection display devices is reduced by simply installing a multi-screen display device. For the purpose.

The present invention
In a multi-screen display device that configures a display screen by combining a plurality of projection display devices that modulate the intensity of light from a light source with a video signal using a light valve and project the video signal on a screen,
One of the plurality of projection display devices is a master projection display device, the other at least one projection display device is a slave projection display device,
Display characteristic storage means that is provided in each of the plurality of projection display devices and stores luminance / chromaticity data of the projection display device;
Means for transmitting the luminance / chromaticity data provided in the slave projection display device and stored in the display characteristic storage means to the master projection display device;
Based on the luminance / chromaticity data provided in the master projection display device and stored in the display characteristic storage means of the master projection display device, and the luminance / chromaticity data transmitted from the slave projection display device Target luminance / chromaticity calculation means for calculating the target luminance / chromaticity of the entire multi-screen,
Means for transmitting to the slave projection display device the target brightness and chromaticity of the entire multi-screen, which is provided in the master projection display device and calculated by the target brightness and chromaticity calculation means;
A correction coefficient that is provided in each of the plurality of projection display devices and calculates a correction coefficient for generating the target luminance / chromaticity in the projection display device based on the target luminance / chromaticity of the entire multi-screen. Computing means;
Luminance and color for a video signal provided to each of the plurality of projection type display devices, with the correction coefficient calculated by the correction coefficient calculation means in the projection type display device as an input. Brightness / chromaticity correction means for correcting the degree and outputting the corrected video signal,
In each of the plurality of projection display devices, an image that forms a multi-screen by supplying a corrected video signal output from the luminance / chromaticity correction means in the projection display device to the light valve. There is provided a multi-screen display device characterized in that control is performed so that the luminance and chromaticity of the display means are close to the target luminance and chromaticity.

  According to the present invention, the target luminance / chromaticity value can be automatically obtained from the luminance / chromaticity data of each projection display device, and the luminance / chromaticity can be automatically changed between multiple screens without adjustment by a human. Can be combined.

Embodiment 1 FIG.
FIG. 1 schematically shows a configuration of a multi-screen display device 1 according to a first embodiment of the present invention. The illustrated multi-screen display device 1 is configured by combining the screens of a plurality of projection display devices 2m and 2s to form a larger display screen (large screen). The illustrated multi-screen display device 1 includes two projection display devices. One projection display device 2m is a master projection display device, and the other projection display device 2s is a slave projection display device. .
The master projection display device 2m and the slave projection display device 2s generally have the same configuration. In the following description, the master projection display device 2m and the slave projection display device 2s may be simply referred to as “master device” and “slave device”.

  As shown in FIG. 2, in each of the master device 2m and the slave device 2s, the light from the light sources 4m and 4s is reflected by the mirrors 5m and 5s, and the intensity corresponding to the video signals DVSm and DVSs is obtained by the light valves 6m and 6s. Modulation is applied, and the images are projected onto the screens 8m and 8s through the projection lenses 7m and 7s. The modulation of light in the light valves 6m and 6s is controlled by the control drive means 10m and 10s.

FIG. 3 shows the control drive means 10m, 10s of the master device 2m and the slave device 2s.
The control drive unit 10m of the master device 2m includes a display characteristic storage unit 11m, a communication interface unit 12m, a target luminance / chromaticity calculation unit 13m, a correction coefficient calculation unit 14m, and a luminance / chromaticity correction unit 15m. .
The control drive unit 10s of the slave device 2m includes a display characteristic storage unit 11s, a communication interface unit 12s, a correction coefficient calculation unit 14s, and a luminance / chromaticity correction unit 15m.

  The communication interface unit 12m of the master device 2m and the communication interface unit 12s of the slave device 2s are connected by a communication cable 16 such as RS422.

  The master device 2m and the slave device 2s are XYZ tristimulus values when the three primary colors red (R), green (G), blue (B), and black (BK) are displayed in the factory at the time of manufacture. (Depending on the characteristics of the light source and the spectral member in the apparatus) and luminance / chromaticity data (display characteristic data) DSTm, DSTs indicating the measured values are displayed in the display characteristic storage means in the master apparatus 2m and the slave apparatus 2s. Are stored in the memories 11m and 11s. That is, the XYZ tristimulus value DSTm of the master device 2m is stored in the memory 11m of the master device 2m, and the XYZ tristimulus value DSTs of the slave device 2s is stored in the memory 11s of the slave device 2s.

The communication interface means 12m and 12s of the master device 2m and the slave device 2s are used for communication of control data between the master device 2m and the slave device 2s.
For example, the communication interface unit 12s of the slave device 2s is used to transmit the luminance / chromaticity data DSTs stored in the display characteristic storage unit 11s of the slave device 2s to the master device 2m.

  The target luminance / chromaticity calculation means 13m is the slave apparatus supplied via the luminance / chromaticity data DSTm stored in the display characteristic storage means 11m of the master device 2m, the communication interface means 12s, 12m, and the communication cable 16. Based on the 2s luminance / chromaticity data DSTs, a common color reproduction range is calculated, and further, target luminance / chromaticity Ct of the entire multi-screen is calculated.

The correction coefficient calculation means 14m in the master device 2m receives the target luminance / chromaticity Ct from the target luminance / chromaticity calculation means 13m, and further receives the luminance / chromaticity data DSTm from the memory 11m. Based on these, the master device A correction coefficient CCGm for generating the target luminance / chromaticity Ct is calculated at 2 m.
The luminance / chromaticity correction unit 15m in the master device 2m receives the correction coefficient CCGm output from the correction coefficient calculation unit 14m, corrects the luminance and chromaticity of the video signal, and outputs the corrected video signal. To do.

The communication interface unit 12m of the master device 2m communicates the target luminance / chromaticity Ct of the entire multi-screen to the slave device 2s. The communication interface unit 12s of the slave device 2s receives the target luminance / chromaticity Ct of the entire multi-screen transmitted from the master device 2m.
The correction coefficient calculation means 14s in the slave device 2s receives the target luminance / chromaticity Ct from the target luminance / chromaticity calculation means 13m of the master device 2m, and further receives the luminance / chromaticity data DSTs from the memory 11s. Then, the correction coefficient CCGs for generating the target luminance / chromaticity Ct of the entire multi-screen is calculated in the slave device 2s.

  The luminance / chromaticity correction unit 15s in the slave device 2s receives the correction coefficient CCGs output from the correction coefficient calculation unit 14s, corrects the luminance and chromaticity of the video signal, and outputs the corrected video signal. To do.

  In each of the master device 2m and the slave device 2s, the corrected video signal output from the luminance / chromaticity correction means 15m, 15s is supplied to the light valves 6m, 6s, thereby the video display means constituting the multi-screen. Control is performed so that the luminance and chromaticity are close to the target luminance and chromaticity.

  Hereinafter, the calculation of the target luminance / chromaticity in the target luminance / chromaticity calculating means 13m will be described in detail.

  The luminance / chromaticity data DSTm and DSTs stored in the memories 11m and 11s of the master device 2m and the slave device 2s are measured XYZ tristimulus values (red (R), green (G) as primary colors) And XYZ tristimulus values when each of blue and blue (B) is displayed, and this is converted into data indicating the x and y coordinates of the vertices of the triangle on the xy chromaticity diagram showing the respective color reproduction ranges The data obtained by doing this is represented by symbols UTm and UTs. Data DSTm is a set of characteristic coefficients XMQr, YMQr, ZMQr, XMQg, YMQg, ZMQg, XMQb, YMQb, ZMQb, XMQk, YMQk, ZMQk, and data DSTs are characteristic coefficients XSQr, YSQr, QSg, SGSg, This is a set of ZSQg, XSQb, YSQb, ZSQb, XSQk, YSQk, and ZSQk.

  Two different examples of the color reproduction ranges of the master device 2m and the slave device 2s are shown in FIGS. 4 and 5, the triangle R1G1B1 indicates the color reproduction range of the master device 2m, and the triangle R2G2B2 indicates the color reproduction range of the slave device 2s. The target luminance / chromaticity calculating means 13m of the master device 2m calculates the coordinate value of the common area triangle RtGtBt from the coordinate values of the triangle R1G1B1 and the triangle R2G2B2. The common area triangle RtGtBt represents a range that can be reproduced (displayed) on both the master device 2m and the slave device 2s.

Hereinafter, a method for obtaining the common area triangle RtGtBt by the target luminance / chromaticity calculating means 13m of the master apparatus 2m will be described.
The target luminance / chromaticity calculating means 13m of the master device 2m first converts the red (R) XYZ tristimulus values DSTm stored in the memory 11m in the master device 2m into xy chromaticity coordinate values UTm. Find the coordinates of R1. Similarly, the coordinates of the vertices G1 and B1 are obtained from the XYZ tristimulus values of green (G) and blue (B). Next, the red (R), green (G), and blue (B) XYZ tristimulus values DSTs read and transmitted from the memory 11s of the slave device 2s are converted into XY chromaticity coordinate values UTs. The coordinates of the vertices R2, G2, and B2 are obtained.

Next, the coordinates of the common area triangle RtGtBt are calculated based on the coordinates of the vertices R1, G1, B1, R2, G2, and B2.
6 and 7 show a procedure for calculating the xy coordinate value of Rt.
In FIG. 6, first, it is determined whether R1 and R2 (coordinate values thereof) are equal to each other (S1). If equal, R1 = R2 (coordinate value) is assumed to be Rt (coordinate value) to be obtained (S2), and the process ends.
If they are not equal, it is determined whether or not each vertex of each triangle is included in the other triangle (S3, S4). If included, each vertex (R1 or R2) is the vertex of the common area. (Rt). That is, it is first determined whether or not the vertex R1 is included in the triangle R2G2B2 (S3), and if it is included, the vertex R1 is set to Rt (S5). If it is not included, it is next determined whether or not the vertex R2 is included in the triangle R1G1B1 (S4). If it is included, the vertex R2 is set to Rt (S6).

Determination of whether it is included is performed by the method shown to Fig.8 (a) and (b). FIGS. 8A and 8B show a method for determining whether or not the vertex R1 is included in the triangle R2G2B2 as an example. The vectors from vertex R1 to each vertex R2, G2, B2 are R2v, G2v, B2v,
R2v x G2v,
G2v x B2v,
B2v x R2v,
(× represents the outer product of vectors)
Are all positive, the vertex R1 is included in the triangle R2G2B2 as shown in FIG. If any of the above three products is negative, the vertex R1 is not included in the triangle R2G2B2 as shown in FIG. 8B, for example.

  If it is determined that neither of the steps S3 and S4 is included, then the intersection calculation shown in FIG. 7 is performed.

  In FIG. 7, it is determined whether or not the line segment R1G1 and the line segment R2B2 shown in FIG. 9 intersect (S11). When intersecting, the intersection is set to Rt (S12). When not intersecting at step S11, the intersection of line segment R2G2 and line segment R1B1 is set to Rt (S13). Such intersection calculation is based on the premise that R1 is closer to R2 than G2 and B2.

The determination whether or not the line segment R1G1 and the line segment R2B2 intersect at step S11 in FIG. 7 is performed by the following method, for example.
When the line segments R1G1 and R2B2 intersect at the intersection point Rt (the intersection point Rt exists on the line segment R1G1 and on the line segment R2B2),
Rtx = R1x + u (G1x−R1x) (1)
Rtx = R2x + v (B2x−R2x) (2)
Rty = R1y + u (G1y−R1y) (3)
Rty = R2x + v (B2y−R2y) (4)
Can be expressed as
(G1x−R1x) u + (R2x−B2x) v = R2x−R1x (5)
(G1y−R1y) u + (R2y−B2y) v = R2y−R1y (6)
And 0 ≦ u ≦ 1, 0 ≦ v ≦ 1 (7)
Holds.
Here, Rtx and Rty are the x and y coordinate values of the point Rt,
R1x and R1y are the x and y coordinate values of the point R1,
G1x and G1y are the x and y coordinate values of the point G1,
R2x and R2y are the x and y coordinate values of the point R2,
B2x and B2y are the x and y coordinate values of the point B2.

  Substituting the respective xy coordinate values into the above equation to obtain u and v, and if u and v satisfy the condition of the above equation (7), it can be seen that the line segment R1G1 and the line segment R2B2 intersect. .

  As described above, Rt is obtained. Gt and Bt are obtained by the same calculation. When the xy coordinate values of the common area triangles Rt, Gt, and Bt are obtained in this way, they are converted into XYZ tristimulus values, which are Ct as data representing target luminance / chromaticity values. As for the luminance, the minimum luminance data included in the luminance / chromaticity data DSTm and DSTs is set as the target luminance / chromaticity data.

The target luminance / chromaticity value Ct of the multi-screen obtained by the target luminance / chromaticity calculating unit 13m of the master device 2m is sent to the correction coefficient calculating unit 14m in the master device 2m and communicated by the communication interface means 12m. The data is sent to the slave device 2s via the cable 16 and received by the communication interface means 12s of the slave device 2s.
In each of the master device 2m and the slave device 2s, correction is performed so that the luminance / chromaticity of the displayed image approaches the target luminance / chromaticity value Ct.

  Hereinafter, calculation of the correction coefficient in the correction coefficient calculation means 14m of the master device 2m will be described. The calculation of the correction coefficient in the slave device 2s is performed in the same manner. In the following calculation of the correction coefficient, an additive color model display device that satisfies Equation (8) is assumed.

In Expression (8), α, β, and γ represent the strength of each component of red (R), green (G), and blue (B), which are the three primary colors in the display color represented by the input video signal DVSm. ,
XMa, YMa, and ZMa represent tristimulus values of colors corresponding to the mixed color ratio of the three primary colors R, G, and B in the display color.
XMQr, YMQr, ZMQr, XMQg, YMQg, ZMQg, XMQb, YMQb, ZMQb are characteristic coefficients of the master device 2m (luminance / chromaticity data DSTm stored in the memory 11m), and α, β, γ are respectively The ratio of the signal representing the R, G, and B components to the maximum value in the range of possible values (for example, when the signal representing each of the R, G, and B components can take a value in the range of 0 to 255, R XMQr, YMQr, and ZMQr are equal to the tristimulus values when displaying the primary color R, and XMQg, YMQg, and ZMQg are XMQb, YMQb, and ZMQb are equal to the tristimulus values when displaying the primary color G.
Hereinafter, the case where α, β, and γ are each expressed as a ratio to the maximum value as described above will be described.

In the above equation (8), when a certain color signal (α, β, γ) is input to a display device having a certain display characteristic DSTm, the tristimulus values of the displayed colors are XMa, YMa, ZMa. Indicates that Here, the actual projection display device must take into account the phenomenon of black floating. Black floating means that even when an input signal value (0, 0, 0) is input, that is, when black is to be displayed, light is actually emitted slightly due to dark current or the like.
When black float is taken into consideration, Equation (9) is obtained by correcting Equation (8).

  XMQr, YMQr, ZMQr, XMQg, YMQg, ZMQg, XMQb, YMQb, ZMQb, XMQk, YMQk, ZMQk are data representing the display characteristics specific to the master device 2m, and are the luminance and chromaticity data stored in the memory 11m. equal.

  When the primary color R, that is, the input signal value (1, 0, 0) is input, the expression (9) becomes the following expression (10).

  When formula (10) is arranged, formula (11) is obtained, and XMQr, YMQr, and ZMQr are equal to the XYZ tristimulus values of the display color when the primary color R, that is, the input signal value (1, 0, 0) is input.

  Similarly, XMQg, YMQg, ZMQg are equal to the XYZ tristimulus values when primary color G is displayed, XMQb, YMQb, ZMQb are primary color B, and XMQk, YMQk, ZMQk are black.

  When the input signal is subjected to correction for generating the target luminance and chromaticity, the relationship between the input signal and the display color is as shown by the following equation (12).

  In Expression (12), the components XMtr, YMtr, ZMtr, XMtg, YMtg, ZMtg, XMtb, YMtb, and ZMtb 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 luminance / chromaticity value Ct as a target 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 (13) is established.

  When formula (13) is rearranged, the following formula (14) is obtained.

  Equation (14) can be modified to obtain the following equation (15).

  Gt and Bt are made the same as in equation (15), and these are arranged to obtain the following equation (16).

  The correction coefficient calculation means 14m has a target brightness / chromaticity value Ct (Xrt, Yrt, Zrt, Xgt, Ygt, Zgt, Xbt, Ybt, Zbt) supplied from the target brightness / chromaticity calculation means 13m and the memory 11m. Using the stored luminance / chromaticity data DSTm, XMQr, YMQr, ZMQr, XMQg, YMQg, ZMQg, XMQb, YMQb, ZMQb, XMQk, YMQk, ZMQk, the equation (16) is calculated, and the correction coefficient XMtr, YMtr, ZMtr, XMtg, YMtg, ZMtg, XMtb, YMtb, ZMtb are obtained.

  The luminance / chromaticity correction unit 15m receives the correction coefficients XMtr, YMtr, ZMtr, XMtg, YMtg, ZMtg, XMtb, YMtb, ZMtb from the correction coefficient calculation unit 14m, and receives the video signal DVSm (α, β, γ) is corrected and output to the light valve 6m.

  In the light valve 6m, the signal input from the luminance / chromaticity correction means 15m is a characteristic represented by characteristic coefficients XMQr, YMQr, ZMQr, XMQg, YMQg, ZMQg, XMQb, YMQb, ZMQb, XMQk, YMQk, ZMQk. The intensity of the light is modulated, and the light modulated by the light valve 6m is projected onto the screen 8m through the projection lens 7m. As a result, an image in which the luminance and chromaticity are substantially corrected to the target value (corrected to be close to the target value) is obtained on the screen 8m.

  The master device 2m has been described above, but the same applies to the slave device 2s. However, for the slave device 2s, the symbols XMQr, YMQr, ZMQr, XMQg, YMQg, ZMQg, XMQb, YMQb, ZMQb, XMQk, YMQk, ZMQk, XMa, YMa, ZMa, XMtr, GMtrX, gMtXMt , XMtb, YMtb, ZMtb, instead of the data represented by the symbols XSQr, YSQr, ZSQr, XSQg, YSQg, ZSQg, XSQb, YSQb, ZSQb, XSQk, YSQk, ZSQk, XSa, YSa, ZSaSr, Sa , XStg, YStg, ZStg, XStb, YStb, and ZStb are used.

  As described above, the target luminance / chromaticity values that can be displayed on the entire multi-screen using the luminance / chromaticity data DSTm, DSTs stored in the memories 11m, 11s of the master device 2m and the slave device 2s in advance ( Ct) and correction coefficients CCGm (= XMtr, YMtr, ZMtr, XMtg, YMtg, ZMtg, XMtb, YMtb, ZMtb), CCGs in each projection display device (2m, 2s) constituting the multi-screen. (= XStr, YStr, ZStr, XStg, YStg, ZStg, XStb, YStb, ZStb) are generated, and luminance / chromaticity correction is performed using these correction coefficients. I can take it. Therefore, the adjuster can automatically match the multi-screens without newly measuring and adjusting the individual brightness and chromaticity of the multi-screens.

  In the above embodiment, the multi-screen display device is composed of two projection display devices, one of which is composed of a master device and the other is composed of a slave device. The display device may be composed of three or more projection display devices, one of which may be a master device, and the other two or more projection display devices may be slave devices.

  In that case, each operation of the slave device is the same as that of the slave 2s of the first embodiment. The master device calculates the common color reproduction range of the plurality of slave devices and the master device based on the luminance / chromaticity data (corresponding to DSTs) from the plurality of slave devices, and the target luminance of the entire multi-screen. Calculate chromaticity Ct and send it to each of the plurality of slave devices.

The reproduction range common to all the projection display devices constituting the multi-screen display device is, for example, common to the arbitrarily selected first and second projection display devices (whether master-slave devices or slave devices). A color reproduction range (first common color reproduction range) is obtained, and then a common color reproduction range (second common color) between the first common color reproduction range and the color reproduction range of the third projection display device The reproduction range is obtained, and thereafter, the same process is repeated.
The correction coefficient calculation means of each slave device independently calculates a correction coefficient and performs correction using the calculated correction coefficient.

Embodiment 2. FIG.
In the first embodiment, the master device 2m calculates the target luminance / chromaticity value Ct, and the projection display device calculates the correction coefficient for correcting the target luminance / chromaticity value Ct. The correction coefficient calculation device 14m of the master device 2m calculates the correction coefficients of all the projection type display devices (2m, 2s) constituting the multi-screen display device, and transmits the calculated correction coefficient to the slave device 2s. good.

The configuration of the control drive means 10m and 10s of the master device 2m and slave device 2s in that case is shown in FIG. As shown in the figure, the control driving means 10m of the master device 2m is similar to the first embodiment described with reference to FIG. 2 in that the memory 11m, the target luminance / chromaticity calculating means 13m, the correction coefficient calculating means 14m, , Luminance / chromaticity correction means 15m and communication interface means 12m. However, unlike FIG. 2, the correction coefficient calculation means 14m is connected to the communication interface means 12m.
The control drive means 10s of the slave device 2s is generally the same as that of FIG. 2, but does not include the correction coefficient calculation means 14s of FIG. 2, and the interface means 12s is connected to the luminance / chromaticity correction means 15s.

The correction coefficient calculation device 14m of the master device 2m is a projection / display device constituting the multi-screen display device, that is, the luminance / chromaticity data DSTs of the slave device 2s in addition to the luminance / chromaticity data DSTm of the master device 2m. The correction coefficients CCGm and CCGs of the master device 2m and the slave device 2s are calculated, and the calculated correction coefficient CCGs for the slave device 2s is obtained via the communication interface means 12m, the cable 16, and the communication interface means 12s. To the luminance / chromaticity correction means 15s.
The luminance / chromaticity correction unit 15s corrects the luminance and chromaticity of the video signal using the correction coefficient CCGs transmitted from the master device 2m, and outputs the corrected video signal.

Embodiment 3 FIG.
The present invention is also applicable to a multi-screen display device configured by combining a projection display device having a function of automatically replacing a built-in replacement light source in the projection display device.

The overall configuration of the multi-screen display device of the present embodiment is as shown in FIG. 1, and the configurations of the master device 2m and the slave device 2s are as shown in FIG. As shown in FIG. 11, each of the master device 2m and the slave device 2s includes one replacement light source 4bm and 4bs in addition to the main light source 4am and 4as, and further includes the main light source 4am and 4as and the replacement light source 4bm, Exchange means 9m, 9s for automatically exchanging 4bs, and common luminance / chromaticity calculation means 18m, 18s are provided. The configuration of the control drive means 10m, 10s of the master device 2m and the slave device 2s of the third embodiment is shown in FIG.
The exchange means 9m and 9s output signals CULm and CULs indicating whether the light source currently used is the main light sources 4am and 4as or the replacement light sources 4bm and 4bs.

  The master device 2m is an XYZ tristimulus value when the primary colors red (R), green (G), blue (B), and black (BK) are displayed by the main light source 4am in the factory at the time of manufacture, and the replacement light source 4bm. Measure the XYZ tristimulus values when each of the primary colors red (R), green (G), blue (B) and black (BK) is displayed, and store them in the memory 11m as (DSTm1, DSTm2). Yes.

  Similarly, the slave device 2s exchanges XYZ tristimulus values when the primary colors red (R), green (G), blue (B), and black (BK) are displayed by the main light source 4as in the factory at the time of manufacture. XYZ tristimulus values are measured when primary colors red (R), green (G), blue (B), and black (BK) are displayed by the light source 4bs, respectively, and luminance / chromaticity data (DSTs1, DSTs2) is stored in the memory 11s.

  The common luminance / chromaticity calculation means 18m is based on the luminance / chromaticity data DSTm1 when the main light source 4am is used and the luminance / chromaticity data DSTm2 when the replacement light source 4bm is used in the master device 2m. The luminance / chromaticity data common to 4bm is calculated as the luminance / chromaticity data DSTm of the master device 2m. The calculation of the common luminance / chromaticity data DSTm can be performed by the same method as described with reference to FIGS. However, in this case, the color reproduction range when the main light source 4am is used is represented by a triangle R1G1B1, and the color reproduction range when the replacement light source 4bm is used is treated as a triangle R2G2B2.

  The common luminance / chromaticity calculation means 18m stores the XYZ tristimulus values corresponding to the common color reproduction region RtGtBt obtained as described above in the memory 11m as the common luminance / chromaticity data DSTm of the master device 2m. To do.

The common luminance / chromaticity calculation means 18s of the slave device 2s uses the luminance / chromaticity data DSTs1 when the main light source 4as is used and the luminance / chromaticity data DSTs2 when the replacement light source 4bs is used in the slave device 2s. Based on this, luminance / chromaticity data common to the light sources 4as and 4bs is calculated as luminance / chromaticity data DSTs of the slave device 2s. The calculation of the common luminance / chromaticity data DSTs is performed in the same manner as the calculation of the common luminance / chromaticity data DSTm.
The calculated common luminance / chromaticity data DSTs is stored in the memory 11s, and further supplied to the target luminance / chromaticity calculating unit 13m of the master device 2m via the communication interface unit 12s, the cable 16, and the interface unit 12m. .

  In the luminance / chromaticity calculation means 13m of the master device 2m, as in the first embodiment, the luminance / chromaticity DSTs transmitted from the slave device 2s and the luminance / color data stored in the memory 11m in the master device 2m. Based on the DSTm, the target luminance / chromaticity Ct of the entire multi-screen is calculated and supplied to the correction coefficient calculation means 14m in the master device 2m, and the slave via the communication interface means 12m, the cable 16, and the communication interface means 12s. It is sent to the correction coefficient calculation means 14s in the apparatus 2s.

  Based on the target luminance / chromaticity Ct of the entire multi-screen, the correction coefficient calculating means 14m in the master device 2m further indicates a signal CULm indicating whether the currently used light source is the main light source 4am or the replacement light source 4bm. In response to (supplied from the exchange means 9m in the master device 2m), the luminance / chromaticity data (DSTm1 or DSTm2) of the light source currently used is read from the memory 11m, and based on these, the master device 2m A correction coefficient CCGm for generating the target luminance / chromaticity Ct is calculated. In this way, by supplying the corrected video signal output from the luminance / chromaticity correcting means 15m to the light valve 6m, the luminance and chromaticity of the projection display device constituting the multi-screen can be changed with the light source 4am. Regardless of which of the light sources 4bm is used, control is performed so as to be close to the target luminance and chromaticity.

  Similarly, the correction coefficient calculation means 14s in the slave device 2s determines whether the currently used light source is the main light source 4as or the replacement light source 4bs based on the target luminance / chromaticity Ct of the entire multi-screen. In response to the signal CULs (supplied from the exchange means 9s in the slave device 2s), the luminance / chromaticity data (DSTs1 or DSTs2) of the light source currently used is read from the memory 11s and based on these, the slave The correction coefficient CCGs for generating the target luminance / chromaticity Ct is calculated in the apparatus 2s. In this way, by supplying the corrected video signal output from the luminance / chromaticity correction means 15s to the light valve 6s, the luminance and chromaticity of the projection display device constituting the multi-screen can be changed with the light source 4as. Regardless of which light source 4bs is used, control is performed so as to be close to the target luminance and chromaticity.

  With such a configuration, in the state where the main light sources 4am and 4as are used in each of the master device 2m and the slave device 2s, the correction coefficient matching the main light sources 4am and 4as is calculated, while the replacement light source is used for replacement. In a state where the light sources 4bm and 4bs are used, correction coefficients matching the replacement light sources 4bm and 4bs are calculated. For example, in the master device 2m, when the light source is exchanged by the operation of the exchange means 9m and the state where the main light source 4am is used is switched to the state where the replacement light source 4bm is used, this is the correction coefficient calculation means. 14m, and the correction coefficient calculation means 14m switches the correction coefficient according to the change in the state. Similarly, in the slave device 2s, when the light source is exchanged by the operation of the exchange means 9s and the state where the main light source 4as is used is switched to the state where the replacement light source 4bs is used, this is the correction coefficient. The correction coefficient calculation means 14s switches the correction coefficient according to the change in the state.

  As described above, the target luminance that can be displayed on the entire multi-screen using the luminance and chromaticity data when using the main light source and the replacement light source stored in the memories 11m and 11s of the master device 2m and the slave device 2s in advance. -Since the chromaticity value Ct is calculated and the luminance and chromaticity correction is performed in each projection display device constituting the multi-screen, the luminance and chromaticity of the entire multi-screen can be matched. In this case, the target brightness and chromaticity values that can be displayed with the replacement light source are also automatically corrected after the light source is automatically replaced due to the life of the light source, etc., and the brightness displayed before and after replacement. The chromaticity is almost equal to the common target value, and the adjuster can automatically maintain the matching of the multi-screen without newly measuring and adjusting the individual luminance and chromaticity of the multi-screen.

  In the above example, it has been described that both the master device 2m and the slave device 2s can automatically replace the light source. However, only one of the master device 2m and the slave device automatically supplies the light source. If the apparatus is configured so that it can be replaced, the apparatus that can be automatically replaced can be automatically replaced by performing the processing described in Embodiment 3 as the configuration described in Embodiment 3. For devices that are not, the processing described in the first embodiment may be performed with the same configuration as that described in the first embodiment.

  In the above example, the correction coefficient calculation means 14m and 14s receive the signals CULm and CULs indicating the light source currently used, and the luminance and chromaticity corresponding to the light source currently used from the memories 11m and 11s. Data (DSTm1 or DSTm2, DSTs1 or DSTs2) is read out, but the signals CULm and CULs are supplied as control signals to the memories 11m and 11s, and luminance / chromaticity data (DSTm1) corresponding to the light source currently used. Alternatively, DSTm2, DSTs1, or DSTs2) may be output.

Embodiment 4 FIG.
In the third embodiment, the target brightness / chromaticity calculation means 13m of the master device 2m calculates the target brightness / chromaticity value Ct, and the correction coefficient calculation means 14s of the master device 2m and slave device 2s performs the correction of the slave device. Although the correction coefficient CCGs is calculated, as in the second embodiment, the correction coefficient calculation means 14s in the slave device 2s is omitted, and the correction coefficient CCGs of the slave device 2s is calculated by the correction coefficient calculation means 14m of the master device 2m. May be calculated and sent to the luminance / chromaticity correction means 15s of the slave device 2s.
An example of the configuration of the control drive means 10m and 10s in this case is shown in FIG.

  The control drive means 15m shown in FIG. 13 is the same as that shown in FIG. 12, but the correction coefficient calculation means 14m of the master device 2m is changed from the memory 11s of the slave device 2s to the currently used light source (4am or 4bm). ) Corresponding to the brightness / chromaticity data (DSTs1 or DSTs2), and the correction coefficient CCGs for the slave device 2s is calculated based on this data and the target brightness / chromaticity Ct.

  The process of supplying luminance / chromaticity data (DSTs1 or DSTs2) corresponding to the currently used light source (4am or 4bm) from the memory 11s to the correction coefficient calculation means 14m is, for example, as shown in FIG. A signal CULs indicating the light source is supplied to the memory 11s of the slave device 2s, and luminance / chromaticity data (DSTs1 or DSTs2) corresponding to the currently used light source is output from the memory 11s, and this is output in the master device 2m. This may be realized by supplying to the correction coefficient calculating means 14m.

  Instead, the signal CULs indicating the light source that is currently used is sent from the slave device 2s to the correction coefficient calculation means 14m of the master device 2m, and the control signal is sent from the correction coefficient calculation means 14m to the memory 11s and is actually sent from the memory 11s. This may be realized by outputting luminance / chromaticity data (DSTs1 or DSTs2) corresponding to the light source being used and supplying it to the correction coefficient calculation means 14m in the master device 2m.

  Furthermore, when the master device 2m and the slave device 2s are connected, or when the light source is exchanged, the slave device 2s to the master device 2m will newly use the light source (and thus “used in practice”). Luminance / chromaticity data (DSTs1 or DSTs2) corresponding to “light source”) may be transmitted and stored in the memory 11m, and the correction coefficient calculation means 14m may read out from the memory 11m as necessary.

  The correction coefficient CCGs calculated by the correction coefficient calculation means 14m of the master device 2m is supplied to the luminance / chromaticity correction means 15s of the slave device 2s, and the luminance / chromaticity calculation means 15s uses the correction coefficient CCGs for the video signal DVSb. Make corrections.

Embodiment 5. FIG.
In the third embodiment and the fourth embodiment, the luminance / chromaticity data DSTm1 (or DSTs1) and the replacement light source 4bm when the main light source 4am (or 4as) is used in the master device 2m and the slave device 2s. Based on the luminance / chromaticity data DSTm2 (or DSTs2) when (or 4bs) is used, the luminance / chromaticity data DSTm (or DSTs) common to a plurality of light sources is converted into the luminance / chromaticity of the projection display device. The common luminance / chromaticity calculating means 18m (or 18s) is calculated and stored in the display characteristic storage means 11m (or 11s) of the projection type display device. , 18s instead of using the main light sources 4am and 4as, luminance and chromaticity data DSTm1 and DSTs1 and replacement light sources 4bm and 4bs are used. The luminance / chromaticity data DSTm2 and DSTs2 are sent to the target luminance / chromaticity calculating means 13m of the master device 2m, and the target luminance / chromaticity calculating means 13m is used in all cases (that is, the master device 2m uses the main light source 4am Is used, the master device 2m uses the replacement light source 4bm, the slave device 2s uses the main light source 4as, and the slave device 2s uses the replacement light source 4bs). The chromaticity Ct may be calculated.

It is the schematic which shows the structure of the multi-screen display apparatus 1 of Embodiment 1 of this invention. 1 is a diagram showing an outline of a projection display device according to a first embodiment. FIG. 3 is a block diagram illustrating a control driving unit of the projection display device according to the first embodiment. It is a figure which shows an example of two mutually different color reproduction ranges. It is a figure which shows the other example of two different color reproduction ranges. It is a flowchart which shows the method of calculating | requiring one vertex of the target color reproduction range. It is a flowchart which shows the method of calculating | requiring one vertex of the target color reproduction range. (A) And (b) is a figure explaining the method of the inclusion determination of FIG. It is a figure explaining the method of intersection determination of FIG. It is a block diagram which shows the control drive means of the projection type display apparatus of Embodiment 2 of this invention. It is a figure which shows the outline of the projection type display apparatus incorporating the light source for replacement | exchange of Embodiment 3 of invention. FIG. 10 is a block diagram illustrating a control drive unit of a projection display device according to a third embodiment. FIG. 10 is a block diagram illustrating a control drive unit of a projection display device according to a fourth embodiment.

Explanation of symbols

1 multi-screen display device, 2m master projection display device, 2s slave projection display device, 4m, 4s light source, 4am, 4as main light source, 4bm, 4bs replacement light source, 5m, 5s mirror, 6m, 6s light valve, 7m 7s projection lens, 8m, 8s screen, 9m, 9s exchange means, 10m, 10s control drive means, 11m, 11s memory, 12m, 12s communication interface means, 13m, 13s target luminance / chromaticity value calculation means, 14m, 14s Correction coefficient calculation means, 15m, 15s luminance / chromaticity correction means, 16 communication cable, 18m, 18s common luminance / chromaticity calculation means.

Claims (4)

In a multi-screen display device that configures a display screen by combining a plurality of projection display devices that modulate the intensity of light from a light source with a video signal using a light valve and project the video signal on a screen,
One of the plurality of projection display devices is a master projection display device, the other at least one projection display device is a slave projection display device,
Display characteristic storage means that is provided in each of the plurality of projection display devices and stores luminance / chromaticity data of the projection display device;
Means for transmitting the luminance / chromaticity data provided in the slave projection display device and stored in the display characteristic storage means to the master projection display device;
Based on the luminance / chromaticity data provided in the master projection display device and stored in the display characteristic storage means of the master projection display device, and the luminance / chromaticity data transmitted from the slave projection display device Target luminance / chromaticity calculation means for calculating the target luminance / chromaticity of the entire multi-screen,
Means for transmitting to the slave projection display device the target brightness and chromaticity of the entire multi-screen, which is provided in the master projection display device and calculated by the target brightness and chromaticity calculation means;
A correction coefficient that is provided in each of the plurality of projection display devices and calculates a correction coefficient for generating the target luminance / chromaticity in the projection display device based on the target luminance / chromaticity of the entire multi-screen. Computing means;
Luminance and color for a video signal provided to each of the plurality of projection type display devices, with the correction coefficient calculated by the correction coefficient calculation means in the projection type display device as an input. Brightness / chromaticity correction means for correcting the degree and outputting the corrected video signal,
In each of the plurality of projection display devices, an image that forms a multi-screen by supplying a corrected video signal output from the luminance / chromaticity correction means in the projection display device to the light valve. A multi-screen display device, characterized in that control is performed so that the luminance and chromaticity of the display means are close to the target luminance and chromaticity. In a multi-screen display device that configures a display screen by combining a plurality of projection display devices that modulate the intensity of light from a light source with a video signal using a light valve and project the video signal on a screen,
One of the plurality of projection display devices is a master projection display device, the other at least one projection display device is a slave projection display device,
Display characteristic storage means that is provided in each of the plurality of projection display devices and stores luminance / chromaticity data of the projection display device;
Means for transmitting the luminance / chromaticity data provided in the slave projection display device and stored in the display characteristic storage means to the master projection display device;
Based on the luminance / chromaticity data provided in the master projection display device and stored in the display characteristic storage means of the master projection display device, and the luminance / chromaticity data transmitted from the slave projection display device Target luminance / chromaticity calculation means for calculating the target luminance / chromaticity of the entire multi-screen,
A plurality of the plurality of projection-type display devices that are provided in the master projection-type display device and generate the target luminance-chromaticity in each of the plurality of projection-type display devices based on the target luminance / chromaticity of the entire multi-screen. Correction coefficient calculation means for calculating a correction coefficient for each of the projection display devices;
Means for transmitting the correction coefficient for the slave projection display device calculated by the correction coefficient calculation means to the slave projection display device;
Luminance for a video signal provided to each of the plurality of projection type display devices, using the correction coefficient for the projection type display device calculated by the correction coefficient calculating means as an input. And luminance / chromaticity correction means for correcting the chromaticity and outputting the corrected video signal,
In each of the plurality of projection display devices, an image that forms a multi-screen by supplying a corrected video signal output from the luminance / chromaticity correction means in the projection display device to the light valve. A multi-screen display device, characterized in that control is performed so that the luminance and chromaticity of the display means are close to the target luminance and chromaticity. At least one projection display device of the plurality of projection display devices includes a main light source, a replacement light source, an exchange means for automatically replacing the main light source and the replacement light source, and the main light source. Luminance / chromaticity data common to a plurality of light sources of the projection display device based on the luminance / chromaticity data when used and the luminance / chromaticity data when the replacement light source is used. A common luminance / chromaticity calculation unit that calculates the luminance / chromaticity data of the device and stores it in the display characteristic storage unit of the at least one projection display device;
The display characteristic storage means provided in the at least one projection type display device has the luminance and chromaticity data when the main light source is used and the luminance when the replacement light source is used in the projection type display device.・ Memorize chromaticity data,
The correction coefficient calculating means provided in the at least one projection display device is based on the target brightness / chromaticity of the entire multi-screen, and further the brightness / chromaticity of the light source currently used from the display characteristic storage means Data is read out, and based on this, the correction coefficient for causing the target luminance and chromaticity in the projection display device is calculated,
By supplying the corrected video signal output from the luminance / chromaticity correction means to the light valve, the luminance and chromaticity of the projection display device constituting the multi-screen can be set to the main light source and the replacement light source. 2. The multi-screen display device according to claim 1, wherein control is performed so as to be close to a target luminance and chromaticity regardless of which of the above is used. At least one projection display device of the plurality of projection display devices includes a main light source, a replacement light source, an exchange means for automatically replacing the main light source and the replacement light source, and the main light source. Luminance / chromaticity data common to a plurality of light sources of the projection display device based on the luminance / chromaticity data when used and the luminance / chromaticity data when the replacement light source is used. A common luminance / chromaticity calculation unit that calculates the luminance / chromaticity data of the device and stores it in the display characteristic storage unit of the at least one projection display device;
The display characteristic storage means provided in the at least one projection type display device has the luminance and chromaticity data when the main light source is used and the luminance when the replacement light source is used in the projection type display device.・ Memorize chromaticity data,
The correction coefficient calculation means of the master projection display device is actually used based on the target luminance / chromaticity of the entire multi-screen and is read from the display characteristic storage means of the at least one projection display device. Based on the luminance and chromaticity data of the light source, the correction coefficient for causing the target luminance and chromaticity in the projection display device is calculated,
The brightness / chromaticity correction means provided in the at least one projection display device is based on the correction coefficient for the projection display device calculated by the correction coefficient calculation means of the master projection display device. Correcting the luminance and chromaticity of the video signal supplied to the projection display device, and outputting the corrected video signal;
By supplying the corrected video signal output from the luminance / chromaticity correction means to the light valve, the luminance and chromaticity of the projection display device constituting the multi-screen can be controlled by the main light source and the replacement light source. The multi-screen display device according to claim 2, wherein control is performed so as to be close to a target luminance and chromaticity regardless of which is used.

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