JP4810944B2 - Luminance unevenness and / or color unevenness correction data calculation method, brightness unevenness and / or color unevenness correction method, and display device - Google Patents

Description

  The present invention relates to a luminance unevenness and / or color unevenness correction data calculation method, luminance unevenness and / or color unevenness correction method, brightness unevenness and / or color unevenness correction data calculation device, display device, brightness unevenness and / or color unevenness correction data. The present invention relates to a calculation program and a luminance unevenness and / or color unevenness correction program.

  In recent years, high-performance display devices such as large-screen televisions and projectors are becoming popular. In these display devices, luminance unevenness and color unevenness generated in a display image greatly affect the image quality. Therefore, it is important to appropriately correct luminance unevenness and color unevenness.

FIG. 12 is a diagram for explaining a conventional display device 900 capable of correcting color unevenness among such brightness unevenness and color unevenness. FIG. 13 is a diagram for explaining the principle of correcting the color unevenness in the conventional display device 900.
As shown in FIG. 12, a conventional display device 900 uses a color separation optical system 920 to separate light from a light source into three primary color lights of red light, green light, and blue light, and these three primary color lights are separated. This is a three-plate liquid crystal projector that modulates using three liquid crystal devices 950a, 950b, and 950c, combines the obtained three modulated lights by a cross dichroic prism 960, and then projects the resultant light onto a projection surface.

  In the conventional display device 900, as shown in FIG. 12, the red light and blue light emitted from the color separation optical system 920 are respectively supplied to the red light liquid crystal device 950a in the red light path and the blue light path. In addition, relay optical systems 930a and 930b for guiding the light to the liquid crystal device 950c for blue light are installed. On the other hand, such a relay optical system is not installed in the green light path. Therefore, in the conventional display device 900, in-plane light of each primary color light irradiated between the liquid crystal device 950a for red light, the liquid crystal device 950c for blue light, and the liquid crystal device 950b for green light. Since the intensity distribution is inverted, when the in-plane light intensity distribution of each primary color light has a large inclination, color unevenness may occur due to this (FIG. 13 (C- (See the solid line in 2).)

  However, according to the conventional display device 900, the primary color light liquid crystal devices 950a, 950b, and 950c are supplied so that the slopes of the in-plane luminance distributions of the primary color lights are substantially equal on the exit surface of the cross dichroic prism 920. Since the adjustment unit for adjusting the image signal to be adjusted is provided, color unevenness caused by the installation of the relay optical system can be reduced (see the broken line in FIG. 13C-2).

JP 2002-13934 A

  However, in the conventional display device 900, the adjustment unit described above adjusts the image signal so that the slopes of the in-plane luminance distributions of the respective primary color lights become substantially equal, and thus the luminance unevenness itself in the display image is reduced. And there is a first problem that fine color unevenness cannot be reduced. Further, in the conventional display device 900, since the image signal is adjusted to reduce the transmittance of each liquid crystal device, there is a second problem that the luminance of the display device is lowered or the gradation characteristics are lowered. There's a problem.

  Accordingly, the present invention has been made to solve the above-described two problems, and can reduce luminance unevenness and fine color unevenness in a display image, and can also be attributed to adjustment of luminance unevenness and color unevenness. Brightness unevenness and / or color unevenness correction data calculation method, brightness unevenness and / or color unevenness correction method, brightness unevenness and / or color unevenness correction data calculation device, display It is an object of the present invention to provide a device, a luminance unevenness and / or color unevenness correction data calculation program, and a luminance unevenness and / or color unevenness correction program.

  As a result of intensive efforts to achieve the above-mentioned object, the present inventor has found that “in-plane light intensity distribution of the in-plane light intensity distribution that is not noticeable from the human eye” We have found that there is “non-uniformity”. For example, when an all-white image is projected from the projector onto the screen, the “in-plane light intensity distribution non-uniformity” in which the light intensity is the highest at the center of the screen and the light intensity is the lowest at the four corners of the screen. May exist. However, “inhomogeneity of the in-plane light intensity distribution” within a certain range is not noticed by human eyes.

  The reason why such “in-plane light intensity distribution non-uniformity” is not obvious to the human eye is not clear, but a) the light intensity gradually decreases from the center to the four corners of the screen. B) Since the central part of the display image is regarded as important for human consciousness, the above-mentioned “non-uniformity of the in-plane light intensity distribution” is difficult for humans to feel unnatural. It is estimated that.

  Therefore, the present inventor does not correct the image data so as to completely remove the “non-uniformity of the in-plane light intensity distribution” based on the above knowledge, but instead of correcting the image data. If the image data is corrected so that the `` character '' is within the range that is not noticeable to the human eye, the illumination light may be partially reduced or the image signal may be corrected to correct the in-plane light intensity distribution. It is possible to sufficiently reduce the non-uniformity of the in-plane light intensity distribution in the illumination light to a range that is not noticeable to the human eye while consuming the minimum amount of gradation resources. As a result, it is possible to sufficiently reduce luminance unevenness and fine color unevenness in the display image, and to suppress luminance deterioration and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness. Possible brightness unevenness and / or color unevenness correction data calculation How conceive that it can be realized, and have completed the present invention.

(1) That is, the color unevenness and / or brightness unevenness correction data calculation method of the present invention is a brightness unevenness for calculating brightness unevenness and / or color unevenness correction data for correcting the brightness unevenness and / or color unevenness in the display device. And / or a color unevenness correction data calculation method, wherein a display screen when a predetermined evaluation image is displayed on the display device is photographed to obtain a luminance distribution and / or a chromaticity distribution on the display screen. A luminance distribution and / or chromaticity distribution acquisition step, and an ideal luminance distribution and / or ideal chromaticity distribution calculation for calculating an ideal luminance distribution and / or ideal chromaticity distribution in the display device from the luminance distribution and / or chromaticity distribution. The luminance unevenness and / or color unevenness correction data is calculated based on the ideal luminance distribution and / or ideal chromaticity distribution and the luminance distribution and / or chromaticity distribution. And having a luminance unevenness and / or color unevenness correction data calculation step.

  Here, the ideal luminance distribution and / or ideal chromaticity distribution is a luminance distribution in which “in-plane light intensity distribution non-uniformity” occurs due to illumination light or the like within a range that is unnoticeable to human eyes. And / or chromaticity distribution. By performing luminance unevenness and / or color unevenness correction with the ideal luminance distribution and / or ideal chromaticity distribution as a target, the illumination light is partially reduced to correct the in-plane light intensity distribution. It is possible to minimize the consumption of gradation resources. For example, exemplifying a luminance distribution with “non-uniformity of in-plane light intensity distribution” in which the luminance gradually decreases from the center to the four corners of the display screen in a range that is not noticeable to the human eye. Can do.

  Therefore, according to the luminance unevenness and / or color unevenness correction data calculation method of the present invention, the luminance unevenness and / or color unevenness correction data is calculated based on the ideal luminance distribution and / or ideal chromaticity distribution as described above. As a result, it is possible to correct the image data within the minimum necessary range so that the “non-uniformity of the in-plane light intensity distribution” falls within a range that is not noticeable to the human eye. In this way, the in-plane light in the illumination light is reduced to the minimum necessary to partially reduce the illumination light or to consume the gradation resources of the image signal in order to correct the in-plane light intensity distribution. It is possible to sufficiently reduce the non-uniformity of the intensity distribution to a range that is not noticeable from the human eye. As a result, it is possible to sufficiently reduce luminance unevenness and fine color unevenness in the display image, and it is possible to suppress deterioration in luminance and gradation characteristics due to adjustment of color unevenness and luminance unevenness. .

(2) In the luminance unevenness and / or color unevenness correction data calculation method of the present invention, in the ideal luminance distribution and / or ideal chromaticity distribution calculation step, the luminance distribution and / or chromaticity distribution is smoothed and smoothed. Calculating a smoothed luminance distribution and / or a smoothed chromaticity distribution, and then reducing and / or reducing the luminance and / or chromaticity for the smoothed luminance distribution and / or the smoothed chromaticity distribution and / or It is preferable to calculate an ideal luminance distribution and / or an ideal chromaticity distribution in the display device by performing a chromaticity shift process.

  As a result, the ideal luminance distribution and / or the ideal color in which local luminance unevenness and fine color unevenness that are easily noticed from the human eye by the smoothed luminance distribution and / or smoothed chromaticity distribution are effectively suppressed. The aspect of the degree distribution is set. The luminance inherent in the display device is obtained by performing luminance and / or chromaticity reduction scaling processing and / or luminance and / or chromaticity shift processing on the smoothed luminance distribution and / or the smoothed chromaticity distribution. It is possible to calculate an ideal luminance distribution and / or ideal chromaticity distribution that does not require a significant change in the distribution and / or chromaticity distribution.

  Note that the reduction scaling process of luminance and / or chromaticity is a range between the maximum value of luminance and / or chromaticity and the minimum value of luminance and / or chromaticity in the smoothed luminance distribution and / or smoothed chromaticity distribution. The smoothing luminance distribution and / or smoothing chromaticity distribution is reduced according to a predetermined rule, and the luminance and / or chromaticity is reduced and scaled to perform the smoothing luminance distribution and / or smoothing. An ideal luminance distribution and / or ideal chromaticity distribution having a gentler distribution than the chromaticity distribution is obtained.

  In addition, the luminance and / or chromaticity shift processing is a smoothed luminance distribution and / or smoothed chromaticity distribution, or a smoothed luminance distribution and / or smoothing to which a reduction scaling process of luminance and / or chromaticity is applied. The process of raising or lowering the chromaticity distribution with respect to the luminance and / or chromaticity, and by performing the luminance and / or chromaticity shift processing, the luminance distribution and / or the chromaticity distribution and the ideal luminance distribution and / or Alternatively, the difference from the ideal chromaticity distribution can be adjusted.

  As a specific example of the luminance and / or chromaticity reduction scaling processing and / or luminance and / or chromaticity shift processing, the maximum value of the smoothed luminance distribution and / or smoothed chromaticity distribution subjected to the reduction scaling processing is the original value. A first reduced scaling process and a shift process for raising the smoothed luminance distribution and / or the smoothed chromaticity distribution subjected to the reduced scaling process so as to be equal to the maximum value of the smoothed luminance distribution and / or the smoothed chromaticity distribution; Smoothed luminance subjected to reduction scaling processing so that the minimum value of the smoothed luminance distribution and / or smoothed chromaticity distribution subjected to the reduction scaling processing is equal to the minimum value of the original smoothed luminance distribution and / or smoothed chromaticity distribution. Second reduced scaling process and shift process for lowering the distribution and / or smoothed chromaticity distribution, reduced smoothed brightness distribution and / or smoothed process Smoothed luminance distribution that has been reduced and scaled so that the range between the maximum value and the minimum value of the degree distribution is included in the range of the original smoothed luminance distribution and / or the maximum value and minimum value of the smoothed chromaticity distribution. And / or a third reduction scaling process and a shift process for raising or lowering the smoothed chromaticity distribution.

(3) In the luminance unevenness and / or color unevenness correction data calculation method of the present invention, in the luminance distribution and / or chromaticity distribution acquisition step, the luminance distribution and / or chromaticity distribution is acquired for each primary color, In the ideal luminance distribution and / or ideal chromaticity distribution calculation step, based on the luminance distribution and / or chromaticity distribution acquired for one primary color among the luminance distribution and / or chromaticity distribution acquired for each primary color. Calculating an ideal luminance distribution and / or ideal chromaticity distribution relating to one primary color, and relating to other primary colors other than the one primary color based on the ideal luminance distribution and / or ideal chromaticity distribution relating to the one primary color An ideal luminance distribution and / or ideal chromaticity distribution is calculated, and in the luminance unevenness and / or color unevenness correction data calculation step, the ideal luminance distribution and / or ideal chromaticity component for the one primary color is calculated. And on the basis of the ideal brightness distribution and / or the ideal chromaticity distribution according to another primary colors other than the one primary color, it is preferable to calculate the luminance unevenness and / or color unevenness correction data for each primary color.

  Thus, by calculating the ideal luminance distribution and / or ideal chromaticity distribution related to other primary colors other than the one primary color based on the ideal luminance distribution and / or ideal chromaticity distribution related to one primary color, The aspect of the ideal luminance distribution and / or the ideal chromaticity distribution can be made uniform between the primary color and other primary colors other than the primary color. This makes it possible to calculate luminance unevenness and / or color unevenness correction data for each primary color, which can suppress the difference in the aspect of the luminance distribution and / or chromaticity distribution between the primary colors.

(4) In the luminance unevenness and / or color unevenness correction data calculation method of the present invention, in the ideal luminance distribution and / or ideal chromaticity distribution calculating step, the luminance distribution and / or chromaticity acquired for the one primary color. The distribution is smoothed to calculate a smoothed luminance distribution and / or a smoothed chromaticity distribution related to the one primary color, and then a luminance for the smoothed luminance distribution and / or the smoothed chromaticity distribution related to the one primary color is calculated. It is preferable to calculate the ideal luminance distribution and / or the chromaticity ideal chromaticity distribution relating to the one primary color by performing a scaling scaling process of chromaticity and / or a shift process of luminance and / or chromaticity.

  As a result, the ideal luminance distribution and / or the ideal color in which local luminance unevenness and fine color unevenness that are easily noticed from the human eye by the smoothed luminance distribution and / or smoothed chromaticity distribution are effectively suppressed. The aspect of the degree distribution is set. The luminance inherent in the display device is obtained by performing luminance and / or chromaticity reduction scaling processing and / or luminance and / or chromaticity shift processing on the smoothed luminance distribution and / or the smoothed chromaticity distribution. It is possible to calculate an ideal luminance distribution and / or ideal chromaticity distribution that does not require a significant change in the distribution and / or chromaticity distribution.

(5) In the luminance unevenness and / or color unevenness correction data calculation method of the present invention, in the ideal luminance distribution and / or ideal chromaticity distribution calculation step, the ideal luminance distribution and / or ideal color related to the one primary color. By performing luminance and / or chromaticity scaling processing and / or luminance and / or chromaticity shift processing on the degree distribution, ideal luminance distribution and / or ideal chromaticity distribution related to other primary colors other than the one primary color Is preferably calculated.

  In this way, one primary color is obtained by performing luminance and / or chromaticity scaling processing and / or luminance and / or chromaticity shift processing on the ideal luminance distribution and / or ideal chromaticity distribution relating to one primary color. By calculating the ideal luminance distribution and / or ideal chromaticity distribution related to other primary colors, the ideal luminance distribution and / or ideal chromaticity distribution between one primary color and another primary color other than one primary color is calculated. Aspects can be aligned. This makes it possible to calculate luminance unevenness and / or color unevenness correction data for each primary color, which can suppress the difference in the aspect of the luminance distribution and / or chromaticity distribution between the primary colors. In this case, the scaling process of luminance and / or chromaticity includes a reduction scaling process, an enlargement scaling process, and an equal scaling process. The brightness and / or chromaticity shift processing includes brightness and / or chromaticity bottom-up processing, bottom-down processing, and the like.

(6) In the luminance unevenness and / or color unevenness correction data calculation method of the present invention, the one primary color is a primary color having the highest visibility among the primary colors, a primary color having the highest light intensity among the primary colors, or each primary color. Of these, the primary color having the smallest dispersion of the luminance distribution or chromaticity distribution is preferable.

  As a result, when one primary color is the primary color having the highest visibility among the primary colors or the primary color having the highest light intensity among the primary colors, the luminance reduction and gradation characteristics due to the adjustment of the color unevenness and the brightness unevenness Degradation can be minimized. In addition, when one primary color is a primary color having the smallest luminance distribution or chromaticity distribution among the primary colors, the ideal luminance distribution and / or ideal chromaticity distribution related to the one primary color becomes gentle, Luminance unevenness and / or color unevenness correction data in which unevenness in luminance and / or color unevenness is strongly suppressed is calculated.

(7) In the luminance unevenness and / or color unevenness correction data calculation method of the present invention, it is preferable that the predetermined evaluation image is an image having the same pixel value on the entire screen.

  By adopting such a method, it is possible to obtain the luminance distribution and / or chromaticity distribution with high accuracy. In this case, it is preferable to use an achromatic image (for example, an all-white image or an all-grey image) as an image having the same pixel value on the entire screen.

(8) In the luminance unevenness and / or color unevenness correction data calculation method of the present invention, it is preferable to use a plurality of images having different pixel values as the predetermined evaluation image.

  By adopting such a method, it is possible to obtain the luminance distribution and / or chromaticity distribution with high accuracy for each predetermined gradation. In this case, for example, it is preferable to use a plurality of achromatic images having different luminances as the plurality of images.

(9) In the luminance unevenness and / or color unevenness correction data calculation method of the present invention, the luminance unevenness and / or color unevenness correction data is calculated for each pixel in the luminance unevenness and / or color unevenness correction data calculation step. It is preferable to do.

  Accordingly, by calculating the luminance unevenness and / or color unevenness correction data for each pixel, it is possible to obtain a display image in which the luminance unevenness and / or color unevenness is corrected for each pixel.

(10) The brightness unevenness and / or color unevenness correction method of the present invention is a brightness unevenness and / or color unevenness correction method for correcting the brightness unevenness and / or color unevenness in the display device. A luminance distribution and / or chromaticity distribution acquisition step of capturing a luminance distribution and / or chromaticity distribution on the display screen by photographing a display screen when the evaluation image is displayed; and the luminance distribution and / or An ideal luminance distribution and / or ideal chromaticity distribution calculating step for calculating an ideal luminance distribution and / or ideal chromaticity distribution in the display device from the chromaticity distribution; the ideal luminance distribution and / or ideal chromaticity distribution and the luminance distribution; And / or luminance unevenness and / or color unevenness correction data calculating step for calculating the luminance unevenness and / or color unevenness correction data based on the chromaticity distribution, and the luminance unevenness and / or On the basis of the color unevenness correction data, and having an image data correction step of correcting the image data.

  Therefore, according to the luminance unevenness and / or color unevenness correction method of the present invention, based on the luminance unevenness and / or color unevenness correction data calculated based on the ideal luminance distribution and / or ideal chromaticity distribution as described above. By correcting the image data, it is possible to correct the image data within the minimum necessary range so that the “non-uniformity of the in-plane light intensity distribution” falls within the range that is not noticeable to the human eye. It becomes possible. In other words, in-plane light intensity in the illumination light while partially reducing the illumination light and consuming the gradation resources of the image signal to correct the in-plane light intensity distribution. It is possible to sufficiently reduce the non-uniformity of the distribution to a range that is not noticeable from the human eye. As a result, luminance unevenness and fine color unevenness on the display screen are sufficiently reduced, and luminance reduction and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness are suppressed.

(11) The luminance unevenness and / or color unevenness correction data calculation device according to the present invention is a luminance unevenness for calculating luminance unevenness and / or color unevenness correction data for correcting the luminance unevenness and / or color unevenness in the display device. And / or a color unevenness correction data calculation device that captures a display screen when a predetermined evaluation image is displayed on the display device, and obtains a luminance distribution and / or a chromaticity distribution on the display screen. An ideal luminance distribution and / or ideal chromaticity distribution calculation for calculating an ideal luminance distribution and / or ideal chromaticity distribution in the display device from the luminance distribution and / or chromaticity distribution acquisition means and the luminance distribution and / or chromaticity distribution Brightness unevenness for calculating the brightness unevenness and / or color unevenness correction data based on the means and the ideal brightness distribution and / or ideal chromaticity distribution and the brightness distribution and / or chromaticity distribution. And having a beauty / or color unevenness correction data calculating means.

  Therefore, according to the luminance unevenness and / or color unevenness correction data calculation apparatus of the present invention, the luminance unevenness and / or color unevenness correction data is calculated based on the ideal luminance distribution and / or ideal chromaticity distribution as described above. Image data can be corrected within the minimum necessary range so that the “non-uniformity of the in-plane light intensity distribution” is within the range that is not noticeable to the human eye. . In this way, the in-plane light in the illumination light is reduced to the minimum necessary to partially reduce the illumination light or to consume the gradation resources of the image signal in order to correct the in-plane light intensity distribution. It is possible to sufficiently reduce the non-uniformity of the intensity distribution to a range that is not noticeable from the human eye. As a result, luminance unevenness and fine color unevenness on the display screen are sufficiently reduced, and luminance reduction and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness are suppressed.

(12) The display device of the present invention is a display device having a function of correcting luminance unevenness and / or color unevenness, and shoots a display screen when a predetermined evaluation image is displayed on the display device. A luminance distribution and / or chromaticity distribution acquisition means for acquiring a luminance distribution and / or chromaticity distribution in the display screen, and an ideal luminance distribution and / or ideal color in the display device from the luminance distribution and / or chromaticity distribution. Based on the ideal luminance distribution and / or ideal chromaticity distribution calculating means for calculating the degree distribution, and the ideal luminance distribution and / or ideal chromaticity distribution and the luminance distribution and / or chromaticity distribution, the luminance unevenness and / or Alternatively, luminance unevenness and / or color unevenness correction data calculation means for calculating color unevenness correction data, and luminance unevenness and / or color unevenness compensation calculated by the brightness unevenness and / or color unevenness correction data calculation means. A storage device for storing data,
An image data correction unit that corrects image data based on the luminance unevenness and / or color unevenness correction data and an image display unit are provided.

  Therefore, according to the display device of the present invention, the image data is corrected based on the luminance unevenness and / or color unevenness correction data calculated based on the ideal luminance distribution and / or the ideal chromaticity distribution as described above. Therefore, it is possible to correct the image data within the minimum necessary range so that the “non-uniformity of the in-plane light intensity distribution” falls within a range that is not noticeable to the human eye. In this way, the in-plane light in the illumination light is reduced to the minimum necessary to partially reduce the illumination light or to consume the gradation resources of the image signal in order to correct the in-plane light intensity distribution. It is possible to sufficiently reduce the non-uniformity of the intensity distribution to a range that is not noticeable from the human eye. As a result, luminance unevenness and fine color unevenness on the display screen are sufficiently reduced, and luminance reduction and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness are suppressed.

(13) The display device of the present invention is a display device having a function of correcting luminance unevenness and / or color unevenness, and the luminance unevenness calculated by the luminance unevenness and / or color unevenness correction data calculating device of the present invention. And / or a storage device that stores color unevenness correction data, an image data correction unit that corrects image data based on the brightness unevenness and / or color unevenness correction data, and an image display unit. .

  Therefore, according to the display device of the present invention, the image data is corrected based on the luminance unevenness and / or color unevenness correction data calculated based on the ideal luminance distribution and / or the ideal chromaticity distribution as described above. Therefore, it is possible to correct the image data within the minimum necessary range so that the “non-uniformity of the in-plane light intensity distribution” is within the range that is not noticeable from the human eye. . In this way, the in-plane light in the illumination light is reduced to the minimum necessary to partially reduce the illumination light or to consume the gradation resources of the image signal in order to correct the in-plane light intensity distribution. It is possible to sufficiently reduce the non-uniformity of the intensity distribution to a range that is not noticeable from the human eye. As a result, luminance unevenness and fine color unevenness on the display screen are sufficiently reduced, and luminance reduction and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness are suppressed.

(14) In the display device of the present invention, it is preferable that the display device is a projector.

  In general, when an all-white image is projected from a projector onto a screen, the “in-plane light intensity distribution non-uniformity” is such that the light intensity is the highest at the center of the screen and the light intensity is the lowest at the four corners of the screen. Exists. However, as described above, within a certain range, “inhomogeneity of the in-plane light intensity distribution” is not noticed by human eyes. Therefore, by applying the present invention to such a projector, minimum luminance unevenness and / or color unevenness correction data that does not greatly change the luminance distribution and / or chromaticity distribution inherent in the display device can be obtained. As a result, in order to correct the in-plane light intensity distribution, it is necessary to partially reduce illumination light and consume gradation resources of the image signal to the minimum necessary. However, the non-uniformity of the in-plane light intensity distribution in the illumination light can be sufficiently reduced to a range that is not noticeable from the human eye. As a result, luminance unevenness and fine color unevenness on the display screen are sufficiently reduced, and luminance reduction and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness are suppressed.

(15) The brightness unevenness and / or color unevenness correction data calculation program of the present invention includes a brightness distribution and / or chromaticity distribution acquisition means, an ideal brightness distribution and / or ideal chromaticity distribution calculation means, brightness unevenness and / or A brightness unevenness and / or color unevenness correction data calculation program for calculating brightness unevenness and / or color unevenness correction data in a color unevenness correction data calculating device having color unevenness correction data calculating means, Photographing a display screen when a predetermined evaluation image is displayed on the display device for calculating the luminance unevenness and / or color unevenness correction data on the luminance unevenness and / or color unevenness correction data calculating device, A luminance distribution and / or chromaticity distribution acquisition step for acquiring a luminance distribution and / or chromaticity distribution on a display screen, and the display from the luminance distribution and / or chromaticity distribution An ideal luminance distribution and / or ideal chromaticity distribution calculating step for calculating an ideal luminance distribution and / or ideal chromaticity distribution in the position, the ideal luminance distribution and / or ideal chromaticity distribution and the luminance distribution and / or chromaticity distribution And a luminance non-uniformity and / or color non-uniformity correction data calculation step for calculating the non-uniform luminance and / or non-uniform color correction data.

  For this reason, according to the luminance unevenness and / or color unevenness correction data calculation program of the present invention, the above-described ideal luminance distribution and / or ideal nonuniformity correction data calculation device of the present invention is added to the above-described luminance unevenness and / or color unevenness correction data calculation device. Since it is possible to calculate luminance unevenness and / or color unevenness correction data based on the chromaticity distribution, the “non-uniformity of the in-plane light intensity distribution” falls within a range that is not noticeable to the human eye. It is possible to correct the image data within the minimum necessary range. In this way, the in-plane light in the illumination light is reduced to the minimum necessary to partially reduce the illumination light or to consume the gradation resources of the image signal in order to correct the in-plane light intensity distribution. It is possible to sufficiently reduce the non-uniformity of the intensity distribution to a range that is not noticeable from the human eye. As a result, luminance unevenness and fine color unevenness on the display screen are sufficiently reduced, and luminance reduction and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness are suppressed.

(16) The luminance unevenness and / or color unevenness correction program of the present invention includes a luminance distribution and / or chromaticity distribution acquisition means, an ideal luminance distribution and / or ideal chromaticity distribution calculation means, and luminance unevenness and / or color unevenness. A brightness unevenness and / or color unevenness correction program for correcting brightness unevenness and / or color unevenness in a display device having a correction data calculation means, an image data correction means, and an image display unit, which is stored in the display device. A luminance distribution and / or chromaticity distribution acquisition step of photographing a display screen when a predetermined evaluation image is displayed on the display device and acquiring a luminance distribution and / or chromaticity distribution on the display screen; An ideal luminance distribution and / or ideal chromaticity distribution calculating step of calculating an ideal luminance distribution and / or ideal chromaticity distribution in the display device from the luminance distribution and / or chromaticity distribution; A luminance unevenness and / or color unevenness correction data calculating step for calculating the luminance unevenness and / or color unevenness correction data based on the ideal luminance distribution and / or ideal chromaticity distribution and the luminance distribution and / or chromaticity distribution; An image data correction step of correcting image data based on the luminance unevenness and / or color unevenness correction data is included.

  Therefore, according to the brightness unevenness and / or color unevenness correction program of the present invention, the brightness unevenness calculated based on the ideal brightness distribution and / or ideal chromaticity distribution as described above is added to the display device of the present invention. In addition, since it is possible to correct the image data based on the color unevenness correction data, it is necessary that the “non-uniformity of the in-plane light intensity distribution” falls within a range that is unnoticeable to the human eye. Image data can be corrected within a minimum range. In this way, the in-plane light in the illumination light is reduced to the minimum necessary to partially reduce the illumination light or to consume the gradation resources of the image signal in order to correct the in-plane light intensity distribution. It is possible to sufficiently reduce the non-uniformity of the intensity distribution to a range that is not noticeable from the human eye. As a result, luminance unevenness and fine color unevenness on the display screen are sufficiently reduced, and luminance reduction and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness are suppressed.

  Hereinafter, luminance unevenness and / or color unevenness correction data calculation method, brightness unevenness and / or color unevenness correction method, brightness unevenness and / or color unevenness correction data calculation device, display device, brightness unevenness and / or color unevenness correction of the present invention A data calculation program and a luminance unevenness and / or color unevenness correction program will be described based on the embodiments shown in the drawings.

[Embodiment 1]
The first embodiment is an embodiment related to a luminance unevenness and / or color unevenness correction data calculation method, a luminance unevenness and / or color unevenness correction data calculation device, and a display device.

FIG. 1 is a diagram for explaining the luminance unevenness and / or color unevenness correction data calculation device 200 and the display device 100 according to the first embodiment.
The luminance unevenness and / or color unevenness correction data calculation apparatus 200 according to the first embodiment calculates the luminance unevenness and / or color unevenness correction data for correcting the luminance unevenness and / or color unevenness in the display device 100. This is a nonuniformity and / or color nonuniformity correction data calculation device. As shown in FIG. 1, the imaging device 210, the luminance distribution and / or chromaticity distribution acquisition unit 220, the luminance distribution and / or chromaticity distribution storage unit 230, and the ideal luminance distribution and / or ideal chromaticity distribution The calculation unit 240, the ideal luminance distribution and / or ideal chromaticity distribution storage unit 250, and the luminance unevenness and / or color unevenness correction data calculation unit 260 are provided.

  On the other hand, the display device 100 according to the first embodiment includes an image display unit 110, a luminance unevenness and / or color unevenness correction data storage unit 120, and an image data correction unit 130. The display device 100 according to the first embodiment is configured to receive either predetermined image data for evaluation or input image data. The display device 100 according to the first embodiment is a projector, and is configured to project a projected image on a screen.

FIG. 2 is a diagram for explaining the luminance unevenness and / or color unevenness correction data calculation method according to the first embodiment.
As shown in FIG. 2, the luminance unevenness and / or color unevenness correction data calculation method according to the first embodiment includes a luminance distribution and / or chromaticity distribution acquisition step S10 and an ideal luminance distribution and / or ideal chromaticity distribution calculation step. S20 and luminance unevenness and / or color unevenness correction data calculating step S30 for calculating unevenness in brightness and / or uneven color correction data. Hereinafter, each step will be described in detail.

1. Luminance distribution and / or chromaticity distribution acquisition step S10
In the luminance distribution and / or chromaticity distribution acquisition step S10, the display screen when the predetermined image for evaluation is displayed on the display device 100 is photographed by the imaging device 210, and the luminance distribution on the display screen is obtained from the obtained photographing data. And / or a step of acquiring a chromaticity distribution, which is performed by the luminance distribution and / or chromaticity distribution acquisition means 220.

FIG. 3 is a diagram for explaining the luminance distribution and / or chromaticity distribution acquisition step S10 in the first embodiment.
As shown in FIG. 3, the luminance distribution and / or chromaticity distribution acquisition step S10 includes a step S11 for displaying a predetermined evaluation image on the display device 100, and a display screen displaying the predetermined evaluation image. Step S12 for obtaining image data by photographing with the imaging device 210 and step S13 for obtaining the luminance distribution and / or chromaticity distribution in the display image by processing the obtained image data.

In the luminance distribution and / or chromaticity distribution acquisition step S10, as a predetermined evaluation image, as shown in FIG. 3, an image in which luminance values and / or chromaticity values equal to all the pixels on the display screen are set ( For example, an all white image or an all gray image) is used.
In the luminance distribution and / or chromaticity distribution acquisition step S10, as shown in FIG. 3, processing such as noise removal, lens distortion removal, geometric correction, luminance and / or chromaticity calculation operations is performed on the obtained shooting data. Thus, the luminance and / or chromaticity distribution is acquired for each pixel.
The acquired luminance distribution and / or chromaticity distribution is stored in the luminance distribution and / or chromaticity distribution storage unit 230 as shown in FIG.

2. Ideal luminance distribution and / or ideal chromaticity distribution calculating step S20
The ideal luminance distribution and / or ideal chromaticity distribution calculating step S20 is a step of calculating the ideal luminance distribution and / or ideal chromaticity distribution in the display device 100 from the luminance distribution and / or chromaticity distribution, / Or ideal chromaticity distribution calculating means 240
Here, the ideal luminance distribution and / or ideal chromaticity distribution is a luminance distribution in which “in-plane light intensity distribution non-uniformity” occurs due to illumination light or the like within a range that is unnoticeable to human eyes. And / or chromaticity distribution. By performing luminance unevenness and / or color unevenness correction with the ideal luminance distribution and / or ideal chromaticity distribution as a target, the illumination light is partially reduced to correct the in-plane light intensity distribution. It is possible to minimize the consumption of gradation resources. For example, exemplifying a luminance distribution with “non-uniformity of in-plane light intensity distribution” in which the luminance gradually decreases from the center to the four corners of the display screen in a range that is not noticeable to the human eye. Can do.

FIG. 4 is a diagram for explaining the ideal luminance distribution and / or ideal chromaticity distribution calculating step S20 in the first embodiment. 5-7 is a figure shown in order to demonstrate the example of a process in ideal brightness distribution and / or ideal chromaticity distribution calculation step S20 of Embodiment 1. FIG.
As shown in FIG. 4, the ideal luminance distribution and / or ideal chromaticity distribution calculating step S20 includes a step S21 of acquiring the luminance distribution and / or chromaticity distribution from the luminance distribution and / or chromaticity distribution storage unit 230, and the luminance. Smoothing the distribution and / or chromaticity distribution to calculate the smoothed luminance distribution and / or the smoothed chromaticity distribution, and the maximum and minimum values of the smoothed luminance distribution and / or the smoothed chromaticity distribution. And S24 for calculating the ideal luminance distribution from the maximum value / minimum value of the smoothed luminance distribution and / or the smoothed chromaticity distribution, the smoothed luminance distribution and / or the smoothed chromaticity distribution. ing.

  The calculated smoothed luminance distribution and / or smoothed chromaticity distribution is stored in the smoothed luminance distribution and / or smoothed chromaticity distribution storage unit 232, and the calculated smoothed luminance distribution and / or smoothed color is stored. The maximum value / minimum value of the degree distribution is stored in the smoothed luminance distribution and / or the smoothed chromaticity distribution maximum value / minimum value storage unit 234, and the ideal luminance distribution and / or ideal chromaticity distribution is calculated. In S24, the smoothed luminance distribution stored in the smoothed luminance distribution and / or the smoothed chromaticity distribution storage unit 232 and the smoothed luminance distribution and / or the maximum value / minimum value storage unit 234 of the smoothed chromaticity distribution. The ideal luminance distribution and / or the ideal chromaticity distribution is calculated using the smoothed chromaticity distribution and the smoothed luminance distribution and / or the maximum value / minimum value of the smoothed chromaticity distribution. The calculated ideal luminance distribution and / or ideal chromaticity distribution is stored in the ideal luminance distribution and / or ideal chromaticity distribution storage unit 250.

In the ideal luminance distribution and / or ideal chromaticity distribution calculation step S20, as shown in FIGS. 5 to 7, the luminance and / or chromaticity reduction scaling processing and / or the luminance distribution and / or chromaticity distribution are performed. An ideal luminance distribution and / or ideal chromaticity distribution in the display device 100 is calculated by performing a shift process of luminance and / or chromaticity.
As an example of luminance and / or chromaticity scaling processing and / or luminance and / or chromaticity shift processing for the luminance distribution and / or chromaticity distribution, a smoothed luminance distribution subjected to reduction scaling processing as shown in FIG. And / or the smoothed luminance distribution and / or smoothed chromaticity subjected to the reduction scaling processing so that the maximum value of the smoothed chromaticity distribution becomes equal to the original smoothed luminance distribution and / or the maximum value of the smoothed chromaticity distribution. The first reduced scaling process and shift process (Processing Example 1) for raising the distribution, and the smoothed luminance distribution and / or the minimum value of the smoothed chromaticity distribution subjected to the reduced scaling process as shown in FIG. Second reduced scaling that lowers the smoothed luminance distribution and / or smoothed chromaticity distribution that has been subjected to the reduced scaling processing so as to be equal to the minimum value of the distribution and / or smoothed chromaticity distribution The range between the maximum value and the minimum value of the smoothed luminance distribution and / or the smoothed chromaticity distribution subjected to the reduction scaling process as shown in FIG. 7 is the original smoothed luminance distribution. And / or a third reduced scaling process that raises or lowers the smoothed luminance distribution and / or the smoothed chromaticity distribution that has been reduced and scaled so as to be included in the range between the maximum value and the minimum value of the smoothed chromaticity distribution. Any of the shift processing (processing example 3) can be preferably used.

3. Brightness unevenness and / or color unevenness correction data calculation step S30
The brightness unevenness and / or color unevenness correction data calculation step S30 calculates brightness unevenness and / or color unevenness correction data based on the ideal brightness distribution and / or ideal chromaticity distribution and the brightness distribution and / or chromaticity distribution. This step is performed by the luminance unevenness and / or color unevenness correction data calculation means 260.

  The brightness unevenness and / or color unevenness correction data calculated in the brightness unevenness and / or color unevenness correction data calculation step S30 is stored in the brightness unevenness and / or color unevenness correction data storage unit 120 in the display device 100. As a result, in the display device 100, the input image is input based on the luminance unevenness and / or color unevenness correction data stored in the luminance unevenness and / or color unevenness correction data storage unit 120 by the image data correcting unit 130 afterwards. By correcting the data, a projected image with corrected luminance unevenness and / or color unevenness is projected from the image display unit.

  As described above, according to the luminance unevenness and / or color unevenness correction data calculation method according to the first embodiment, based on the ideal luminance distribution and / or ideal chromaticity distribution calculated as described above, luminance unevenness and Since the color unevenness correction data is calculated, the image data is corrected within the minimum necessary range so that the “non-uniformity of the in-plane light intensity distribution” falls within a range that is not noticeable to the human eye. It becomes possible to do. In this way, the in-plane light in the illumination light is reduced to the minimum necessary to partially reduce the illumination light or to consume the gradation resources of the image signal in order to correct the in-plane light intensity distribution. It is possible to sufficiently reduce the non-uniformity of the intensity distribution to a range that is not noticeable from the human eye. As a result, luminance unevenness and fine color unevenness on the display screen are sufficiently reduced, and luminance reduction and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness are suppressed.

  Also, according to the luminance unevenness and / or color unevenness correction data calculation method according to the first embodiment, in the ideal luminance distribution and / or ideal chromaticity distribution calculation step S20, the luminance distribution and / or chromaticity distribution is smoothed. Calculating a smoothed luminance distribution and / or a smoothed chromaticity distribution, and then reducing and / or reducing the luminance and / or chromaticity for the smoothed luminance distribution and / or the smoothed chromaticity distribution and / or By calculating the ideal luminance distribution and / or ideal chromaticity distribution in the display device 100 by performing the chromaticity shift process, the smoothed luminance distribution and / or the smoothed chromaticity distribution is anxious from the human eyes. The ideal luminance distribution and / or ideal chromaticity distribution in which local unevenness of brightness and fine color unevenness are effectively suppressed are set, and the smoothed luminance distribution and / or the smoothed chromaticity distribution are brightened. And / or ideal that does not require a significant change in the luminance distribution and / or chromaticity distribution inherent in the display device 100 by performing scaling reduction processing of chromaticity and / or shift processing of luminance and / or chromaticity. It is possible to calculate a luminance distribution and / or an ideal chromaticity distribution.

  Further, according to the luminance unevenness and / or color unevenness correction data calculation method according to the first embodiment, the predetermined evaluation image has a plurality of luminance values equal to the pixels of the display screen having different luminance and / or chromaticity and / or Since an image for setting a chromaticity value (for example, an all-white image or an all-grey image) is used, it is possible to acquire a luminance distribution with high accuracy for each predetermined gradation.

  Furthermore, in the luminance unevenness and / or color unevenness correction data calculation method according to the first embodiment, the luminance unevenness and / or color unevenness correction data is calculated for each pixel in the luminance unevenness and / or color unevenness correction data calculation step S30. Therefore, a display image in which luminance unevenness and / or color unevenness is corrected for each pixel can be obtained.

  Note that, as described above, the display device 100 according to the first embodiment stores the luminance unevenness and / or color unevenness correction data calculated by the color unevenness and / or luminance unevenness correction data calculating device 200 according to the first embodiment. The storage device 120 includes image data correction means 130 that corrects image data based on luminance unevenness and / or color unevenness correction data.

  Therefore, according to the display device 100 according to the first embodiment, the image data is based on the luminance unevenness and / or color unevenness correction data calculated based on the ideal luminance distribution and / or the ideal chromaticity distribution as described above. Therefore, it is possible to correct the image data within the minimum necessary range so that the “non-uniformity of the in-plane light intensity distribution” is within the range that is unnoticeable to the human eye. It becomes possible. In this way, the in-plane light in the illumination light is reduced to the minimum necessary to partially reduce the illumination light or to consume the gradation resources of the image signal in order to correct the in-plane light intensity distribution. It is possible to sufficiently reduce the non-uniformity of the intensity distribution to a range that is not noticeable from the human eye. As a result, luminance unevenness and fine color unevenness on the display screen are sufficiently reduced, and luminance reduction and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness are suppressed.

As described above, the display device 100 according to the first embodiment is a projector.
As described above, in general, when an all white image is projected from a projector onto a screen, the “in-plane light intensity distribution is such that the light intensity is the highest at the center of the screen and the light intensity is the lowest at the four corners of the screen. Non-uniformity ”. However, as described above, “inhomogeneity of the in-plane light intensity distribution” within a certain range has a property that is less likely to be noticed by human eyes. Accordingly, in such a projector, it is possible to calculate minimum luminance unevenness and / or color unevenness correction data without greatly changing the aspect of the luminance distribution and / or color distribution inherent in the display device. As a result, in order to correct the in-plane light intensity distribution, it is possible to partially reduce the illumination light and consume the gradation resources of the image signal while minimizing the surface of the illumination light. It is possible to sufficiently reduce the non-uniformity of the internal light intensity distribution to a range that is not noticeable from the human eye. As a result, luminance unevenness and fine color unevenness on the display screen are sufficiently reduced, and luminance reduction and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness are suppressed.

[Embodiment 2]
As in the case of the first embodiment, the second embodiment is an embodiment related to a luminance unevenness and / or color unevenness correction data calculation method, a luminance unevenness and / or color unevenness correction data calculation device, and a display device.
The brightness unevenness and / or color unevenness correction data calculation method according to the second embodiment is a color unevenness and / or brightness unevenness correction data calculation method for calculating color unevenness and / or brightness unevenness correction data for each primary color. Since the method is the same as the luminance unevenness and / or color unevenness correction data calculation method according to the first embodiment except that the luminance unevenness correction data is calculated for each primary color, the luminance unevenness and / or color unevenness according to the first embodiment. Only differences from the correction data calculation method will be described.

  The luminance unevenness and / or color unevenness correction data calculation method according to the second embodiment is the same as the luminance unevenness and / or color unevenness correction data calculation method according to the first embodiment. S10, ideal luminance distribution and / or ideal chromaticity distribution calculating step S20, and luminance unevenness and / or color unevenness correction data calculating step S30.

In the luminance distribution and / or chromaticity distribution acquisition step S10, the luminance distribution and / or chromaticity distribution is acquired for each primary color (for example, red, green, and blue).
In the ideal luminance distribution and / or ideal chromaticity distribution calculating step S20, one of the luminance distribution and / or chromaticity distribution acquired for each primary color is obtained based on the luminance distribution and / or chromaticity distribution acquired for one primary color. Calculating an ideal luminance distribution and / or ideal chromaticity distribution related to the primary colors, and an ideal luminance distribution related to other primary colors other than the one primary color based on the ideal luminance distribution and / or ideal chromaticity distribution related to one primary color, and // Calculate ideal chromaticity distribution.
In the luminance unevenness and / or color unevenness correction data calculation step S30, one ideal color is obtained from the ideal luminance distribution and / or ideal chromaticity distribution related to one primary color and the luminance distribution and / or chromaticity distribution related to one primary color. The luminance unevenness and / or color unevenness correction data is calculated, and the ideal luminance distribution and / or ideal chromaticity distribution related to other primary colors other than one primary color and / or the luminance distribution related to other primary colors other than one primary color and / or Luminance unevenness and / or color unevenness correction data related to other primary colors other than one primary color are calculated from the chromaticity distribution.

FIG. 8 is a diagram for explaining the ideal luminance distribution and / or ideal chromaticity distribution calculating step S20 in the second embodiment. FIG. 9 is a diagram for explaining a processing example of the ideal luminance distribution and / or ideal chromaticity distribution calculating step according to the second embodiment.
In the ideal luminance distribution and / or ideal chromaticity distribution calculation step S20, as shown in FIG. 8, the luminance distribution and / or chromaticity distribution for each primary color is acquired from the luminance distribution and / or chromaticity distribution storage unit 230a of each primary color. The luminance distribution and / or chromaticity distribution acquisition step S121 of each primary color and the smoothing of the luminance distribution and / or chromaticity distribution of each primary color to obtain a smoothed luminance distribution and / or smoothed chromaticity distribution for each primary color. Smoothing luminance distribution and / or smoothing chromaticity distribution calculating step S122 of each primary color to be calculated, and smoothing of each primary color for calculating the maximum value / minimum value of the smoothing luminance distribution and / or smoothing chromaticity distribution of each primary color Step S123 for calculating the maximum / minimum value of the smoothed luminance distribution and / or the smoothed chromaticity distribution, and the smoothed luminance distribution for selecting one of the smoothed luminance distribution and / or the smoothed chromaticity distribution of each primary color, and / Or smoothing color The distribution selection step S124, the smoothed luminance distribution and / or smoothed chromaticity distribution related to the selected one primary color, and the maximum value of the smoothed luminance distribution and / or smoothed chromaticity distribution related to the selected one primary color An ideal luminance distribution and / or ideal chromaticity distribution calculating step S125 relating to one primary color to calculate an ideal luminance distribution and / or ideal chromaticity distribution relating to one primary color selected from the minimum value, and the one primary color The ideal luminance distribution and / or the ideal chromaticity distribution and the smoothed luminance distribution related to other primary colors other than one primary color and / or the smoothed luminance distribution and the smoothed luminance distribution related to other primary colors other than one primary color And / or ideal luminance distribution related to other primary colors other than one primary color and / or ideal luminance related to other primary colors other than one primary color for calculating the ideal chromaticity distribution from the maximum and minimum values of the smoothed chromaticity distribution Distribution and / or ideal chromaticity distribution calculation -Up S126 and a (see FIG. 9.).

  The calculated smoothed luminance distribution and / or smoothed chromaticity distribution of each primary color, the calculated smoothed luminance distribution of each primary color and / or the maximum / minimum value of the smoothed chromaticity distribution, and the smoothed of each primary color. The smoothed luminance distribution and / or smoothed chromaticity distribution relating to one primary color selected from the normalized luminance distribution, and the ideal luminance distribution and / or ideal chromaticity distribution relating to the selected one primary color are respectively the respective primary colors. Smoothed luminance distribution and / or smoothed chromaticity distribution storage unit 232a, smoothed luminance distribution of each primary color and / or maximum / minimum value storage unit 234a of the smoothed chromaticity distribution, smoothed luminance distribution related to one primary color And / or the smoothed chromaticity distribution storage unit 236a, the ideal luminance distribution related to one primary color and / or the ideal chromaticity distribution storage unit 251a, and the ideal luminance distribution related to other primary colors other than the primary color and / or Step S for calculating ideal chromaticity distribution 26, the smoothed luminance distribution and / or smoothed chromaticity distribution storage unit of each primary color, the smoothed luminance distribution of each primary color and / or the maximum / minimum value storage unit of the smoothed chromaticity distribution, and one primary color. Smoothing luminance distribution and / or smoothing chromaticity distribution related to other primary colors other than one primary color stored in the ideal luminance distribution and / or ideal chromaticity distribution storage unit, and other primary colors other than one primary color Based on the smoothed luminance distribution and / or the maximum / minimum value of the smoothed chromaticity distribution, the ideal luminance distribution and / or ideal chromaticity distribution related to one primary color, the ideal luminance related to other primary colors other than the primary color Distribution and / or ideal chromaticity distribution is calculated. Ideal luminance distribution and / or ideal chromaticity distribution calculating step S20 The ideal luminance distribution and / or ideal chromaticity distribution related to one primary color and the ideal luminance distribution and / or ideal color related to other primary colors other than the primary color The degree distribution is stored in the ideal luminance distribution and / or ideal chromaticity distribution storage unit 250.

  For this reason, according to the luminance unevenness and / or color unevenness correction data calculation method according to the second embodiment, other primary colors other than the primary color are obtained based on the ideal luminance distribution and / or ideal chromaticity distribution related to the primary color. By calculating such ideal luminance distribution and / or ideal chromaticity distribution, it is possible to align the ideal luminance distribution and / or ideal chromaticity distribution between one primary color and another primary color other than one primary color. . Accordingly, it is possible to calculate luminance unevenness and / or color unevenness correction data for each primary color, which can suppress a difference in luminance distribution and / or chromaticity distribution between the primary colors.

  In the luminance unevenness and / or color unevenness correction data calculation method according to the second embodiment, in the ideal luminance distribution and / or ideal chromaticity distribution calculation step, the luminance distribution and / or chromaticity distribution acquired for one primary color is used. The smoothed luminance distribution and / or the smoothed chromaticity distribution relating to one primary color is calculated by smoothing, and then the luminance and / or color for the smoothed luminance distribution and / or the smoothed chromaticity distribution relating to one primary color is calculated. The ideal luminance distribution and / or ideal chromaticity distribution relating to one primary color is calculated by performing the degree-reduction scaling process and / or the brightness and / or chromaticity shift process.

  For this reason, according to the luminance unevenness and / or color unevenness correction data calculation method according to the second embodiment, local luminance that is likely to be noticed from the human eye by the smoothed luminance distribution and / or the smoothed chromaticity distribution. An aspect of an ideal luminance distribution and / or an ideal chromaticity distribution in which unevenness and fine color unevenness are effectively suppressed is set. The luminance inherent in the display device is obtained by performing luminance and / or chromaticity reduction scaling processing and / or luminance and / or chromaticity shift processing on the smoothed luminance distribution and / or the smoothed chromaticity distribution. It is possible to calculate an ideal luminance distribution and / or ideal chromaticity distribution that does not require a significant change in the distribution and / or chromaticity distribution.

  Further, in the luminance unevenness and / or color unevenness correction data calculation method according to the second embodiment, in the ideal luminance distribution and / or ideal chromaticity distribution calculation step, the ideal luminance distribution and / or ideal chromaticity distribution related to one primary color. By calculating luminance and / or chromaticity scaling processing and / or luminance and / or chromaticity shift processing, the ideal luminance distribution and / or ideal chromaticity distribution relating to other primary colors other than one primary color is calculated. To do.

  Therefore, according to the luminance unevenness and / or color unevenness correction data calculation method according to the second embodiment, the luminance and / or chromaticity scaling processing is performed on the ideal luminance distribution and / or ideal chromaticity distribution related to one primary color. And / or calculating the ideal luminance distribution and / or ideal chromaticity distribution related to other primary colors other than one primary color by performing a shift process of luminance and / or chromaticity, so that one primary color and other than one primary color are calculated. The aspect of the ideal luminance distribution and / or the ideal chromaticity distribution can be made uniform with other primary colors. Accordingly, it is possible to calculate luminance unevenness and / or color unevenness correction data for each primary color, which can suppress a difference in luminance distribution and / or chromaticity distribution between the primary colors. In this case, scaling processing includes not only reduction scaling processing but also enlargement scaling processing and equal scaling processing.

  Further, in the luminance unevenness and / or color unevenness correction data calculation method according to the second embodiment, green, which is the primary color with the highest visibility among the primary colors, is used as one primary color.

  For this reason, according to the luminance unevenness and / or color unevenness correction data calculation method according to the second embodiment, it is possible to minimize the decrease in luminance and gradation characteristics due to the adjustment of the uneven color and the uneven luminance.

[Embodiment 3]
The third embodiment is an embodiment related to a luminance unevenness and / or color unevenness correction method and a display device.

FIG. 10 is a diagram for explaining the display device 104 according to the third embodiment.
As shown in FIG. 10, the display device 104 according to the third embodiment includes the luminance unevenness in which the luminance unevenness and / or color unevenness correction data calculation device 200 according to the first embodiment is added to the display device 100 according to the first embodiment. And / or a display device having a function of correcting color unevenness. That is, the display device 104 according to the third embodiment shoots a display screen when a predetermined evaluation image is displayed on the display device, and acquires a luminance distribution and / or a chromaticity distribution on the display screen. / Or chromaticity distribution acquisition means 220; ideal luminance distribution and / or ideal chromaticity distribution calculation means 240 for calculating the ideal luminance distribution and / or ideal chromaticity distribution in the display device from the luminance distribution and / or chromaticity distribution; Brightness unevenness and / or color unevenness correction data calculating means 260 for calculating brightness unevenness and / or color unevenness correction data based on the ideal brightness distribution and / or ideal chromaticity distribution and the brightness distribution and / or chromaticity distribution; Storage device 120 for storing brightness unevenness and / or color unevenness correction data calculated by brightness unevenness and / or color unevenness correction data calculation means, and brightness unevenness and / or color unevenness compensation Based on the data, the image data correcting means 130 for correcting the image data, and an image display unit 110.

FIG. 11 is a diagram for explaining the luminance unevenness and / or color unevenness correction method according to the third embodiment.
As shown in FIG. 11, the luminance unevenness and / or color unevenness correction method according to the third embodiment is similar to the luminance unevenness and / or color unevenness correction data calculation method according to the first embodiment. A chromaticity distribution acquisition step S10, an ideal luminance distribution and / or ideal chromaticity distribution calculation step S20, and a luminance unevenness and / or color unevenness correction data calculation step S30 for calculating luminance unevenness and / or color unevenness correction data. In addition, an image data correction step S40 is provided.

  In the image data correction step S40, the input image data is corrected based on the luminance unevenness and / or color unevenness correction data calculated in the luminance unevenness / color unevenness correction data calculation step S30. As a result, a projected image in which luminance unevenness and / or color unevenness is corrected is projected from the image display unit 110.

  Therefore, according to the display device according to the third embodiment and the color unevenness and / or luminance unevenness correction method according to the third embodiment, the luminance calculated based on the ideal luminance distribution and / or the ideal chromaticity distribution as described above. Since the image data can be corrected based on the unevenness and / or uneven color correction data, the “non-uniformity of the in-plane light intensity distribution” falls within a range that is not noticeable to the human eye. Image data can be corrected within the minimum necessary range. In this way, the in-plane light in the illumination light is reduced to the minimum necessary to partially reduce the illumination light or to consume the gradation resources of the image signal in order to correct the in-plane light intensity distribution. It is possible to sufficiently reduce the non-uniformity of the intensity distribution to a range that is not noticeable from the human eye. As a result, luminance unevenness and fine color unevenness on the display screen are sufficiently reduced, and luminance reduction and gradation characteristic deterioration due to adjustment of color unevenness and luminance unevenness are suppressed.

  The brightness unevenness and / or color unevenness correction data calculation method, brightness unevenness and / or color unevenness correction method, brightness unevenness and / or color unevenness correction data calculation device, and display device of the present invention are based on the above embodiments. Although described, the present invention is not limited to the above-described embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

(1) In the second embodiment, the example using the primary color having the highest visibility among the primary colors has been described as one primary color, but the present invention is not limited to this. For example, a primary color having the highest light intensity among the primary colors and a primary color having the smallest variance in luminance distribution or chromaticity distribution among the primary colors can be used.

(2) In each of the above-described embodiments, the example in which the projector is used as the display device to which the present invention is applied has been described. However, the present invention is not limited to this. For example, a direct-view display device (for example, CRT, plasma display, liquid crystal display, organic EL display, SED) can be used.

(3) In each of the above embodiments, the present invention is used as a luminance unevenness and / or color unevenness correction data calculation method, luminance unevenness and / or color unevenness correction method, luminance unevenness and / or color unevenness correction data calculation device, and display device. Although described, the present invention is not limited to this. For example, it may be a program in which processing procedures for realizing the present invention are described, or a recording medium on which such a program is recorded.

FIG. 3 is a diagram for explaining the luminance unevenness and / or color unevenness correction data calculation device 200 and the display device 100 according to the first embodiment. FIG. 3 is a diagram for explaining a luminance unevenness and / or color unevenness correction data calculation method according to the first embodiment. The figure shown in order to demonstrate the luminance distribution and / or chromaticity distribution acquisition step S10 in Embodiment 1. FIG. The figure shown in order to demonstrate ideal luminance distribution and / or ideal chromaticity distribution setting step S20 in Embodiment 1. FIG. The figure shown in order to explain the example of processing in ideal luminance distribution and / or ideal chromaticity distribution calculation step S20 of Embodiment 1 (processing example 1). The figure shown in order to demonstrate the example of a process in ideal luminance distribution and / or ideal chromaticity distribution calculation step S20 of Embodiment 1 (process example 2). The figure shown in order to demonstrate the example of a process in ideal luminance distribution and / or ideal chromaticity distribution calculation step S20 of Embodiment 1 (process example 3). The figure shown in order to demonstrate ideal luminance distribution and / or ideal chromaticity distribution setting step S20 in Embodiment 2. FIG. The figure shown in order to demonstrate ideal luminance distribution and / or ideal chromaticity distribution setting step S20 in Embodiment 2. FIG. FIG. 6 is a diagram for explaining a display device 104 according to a third embodiment. The figure shown in order to demonstrate the process example in ideal luminance distribution and / or ideal chromaticity distribution setting step S120 of Embodiment 3. The figure shown in order to demonstrate the conventional display apparatus 900. FIG. The figure shown in order to demonstrate the principle which correct | amends the color nonuniformity in the conventional display apparatus 900. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100,104 ... Display apparatus, 110 ... Image display part, 120 ... Luminance unevenness and / or color unevenness correction data calculation storage part, 130 ... Image data correction means, 200 ... Brightness unevenness and / or color unevenness correction data calculation apparatus, 210 DESCRIPTION OF SYMBOLS ... Imaging device, 220 ... Luminance distribution and / or chromaticity distribution acquisition means, 230 ... Luminance distribution and / or chromaticity distribution storage part, 240 ... Ideal luminance distribution and / or ideal chromaticity distribution calculation means, 250 ... Ideal luminance distribution And / or ideal chromaticity distribution storage unit, 260 ... luminance unevenness and / or color unevenness correction data calculation means, 310 ... evaluation image data, 320 ... input image data, 900 ... conventional display device, 920 ... color separation optical system , 930a, 930b ... relay optical system, 950a, 950b, 950c ... liquid crystal device, 960 ... cross dichroic prism, S ... screen

Claims (10)

A brightness unevenness and / or color unevenness correction data calculation method for calculating brightness unevenness and / or color unevenness correction data for correcting brightness unevenness and / or color unevenness in a display device,
A luminance distribution and / or chromaticity distribution acquisition step of capturing a luminance distribution and / or chromaticity distribution in the display screen by photographing a display screen when a predetermined evaluation image is displayed on the display device;
An ideal luminance distribution and / or ideal chromaticity distribution calculating step of calculating an ideal luminance distribution and / or ideal chromaticity distribution in the display device based on the luminance distribution and / or chromaticity distribution;
Luminance unevenness and / or color unevenness correction data calculation step for calculating the luminance unevenness and / or color unevenness correction data based on the ideal luminance distribution and / or ideal chromaticity distribution and the luminance distribution and / or chromaticity distribution. It has a door,
The ideal luminance distribution and / or ideal chromaticity distribution calculating step includes:
Smoothing the luminance distribution and / or chromaticity distribution to calculate a smoothed luminance distribution and / or smoothed chromaticity distribution;
Performing a reduction scaling process of luminance and / or chromaticity on the smoothed luminance distribution and / or smoothed chromaticity distribution;
Performing luminance and / or chromaticity shift processing on the smoothed luminance distribution and / or smoothed chromaticity distribution subjected to the reduction scaling process, and luminance unevenness and / or color unevenness correction data, Calculation method. In the luminance unevenness and / or color unevenness correction data calculation method according to claim 1,
In the luminance distribution and / or chromaticity distribution acquisition step, the luminance distribution and / or chromaticity distribution is acquired for each primary color,
In the ideal luminance distribution and / or ideal chromaticity distribution calculation step, based on the luminance distribution and / or chromaticity distribution acquired for one primary color among the luminance distribution and / or chromaticity distribution acquired for each primary color. Calculating an ideal luminance distribution and / or ideal chromaticity distribution relating to one primary color, and relating to other primary colors other than the one primary color based on the ideal luminance distribution and / or ideal chromaticity distribution relating to the one primary color Calculate the ideal luminance distribution and / or ideal chromaticity distribution,
In the luminance unevenness and / or color unevenness correction data calculation step, the ideal luminance distribution and / or ideal chromaticity distribution related to the one primary color and the ideal luminance distribution and / or ideal related to other primary colors other than the one primary color. A luminance unevenness and / or color unevenness correction data calculation method, wherein the luminance unevenness and / or color unevenness correction data is calculated for each primary color based on a chromaticity distribution. In the luminance unevenness and / or color unevenness correction data calculation method according to claim 2 ,
In the ideal luminance distribution and / or ideal chromaticity distribution calculating step, the luminance distribution and / or ideal chromaticity distribution acquired for the one primary color is smoothed, and the smoothed luminance distribution and / or smoothing related to the one primary color is obtained. A smoothed luminance distribution and / or a reduced scaling process of luminance and / or chromaticity and / or luminance and / or chromaticity for the one primary color A luminance unevenness and / or color unevenness correction data calculation method characterized by calculating an ideal luminance distribution and / or ideal chromaticity distribution related to the one primary color by performing a shift process. In the luminance unevenness and / or color unevenness correction data calculation method according to claim 3 ,
In the ideal luminance distribution and / or ideal chromaticity distribution calculating step, luminance and / or chromaticity scaling processing and / or luminance and / or chromaticity distribution for the ideal luminance distribution and / or ideal chromaticity distribution related to the one primary color. Alternatively, the luminance unevenness and / or color unevenness correction data calculation method for calculating an ideal luminance distribution and / or an ideal chromaticity distribution related to another primary color other than the one primary color by performing a chromaticity shift process . In the luminance unevenness and / or color unevenness correction data calculation method according to claim 3 or 4 ,
The primary color is a primary color having the highest visibility among the primary colors, a primary color having the highest light intensity among the primary colors, or a primary color having the smallest variance in luminance distribution or chromaticity distribution among the primary colors. Brightness unevenness and / or color unevenness correction data calculation method. In the luminance unevenness and / or color unevenness correction data calculation method according to any one of claims 1 to 5 ,
The method for calculating luminance unevenness and / or color unevenness correction data, wherein the predetermined evaluation image is an image having the same pixel value on the entire screen. In the luminance unevenness and / or color unevenness correction data calculation method according to claim 6 ,
A luminance unevenness and / or color unevenness correction data calculation method, wherein a plurality of images having different pixel values are used as the predetermined evaluation image. In the luminance unevenness and / or color unevenness correction data calculation method according to any one of claims 1 to 7 ,
In the luminance unevenness and / or color unevenness correction data calculation step, the luminance unevenness and / or color unevenness correction data is calculated for each pixel. A brightness unevenness and / or color unevenness correction method for correcting brightness unevenness and / or color unevenness in a display device,
A luminance distribution and / or chromaticity distribution acquisition step of capturing a luminance distribution and / or chromaticity distribution in the display screen by photographing a display screen when a predetermined evaluation image is displayed on the display device;
An ideal luminance distribution and / or ideal chromaticity distribution calculating step of calculating an ideal luminance distribution and / or ideal chromaticity distribution in the display device from the luminance distribution and / or chromaticity distribution;
Luminance unevenness and / or color unevenness correction data calculation step for calculating the luminance unevenness and / or color unevenness correction data based on the ideal luminance distribution and / or ideal chromaticity distribution and the luminance distribution and / or chromaticity distribution. When,
On the basis of the luminance unevenness and / or color unevenness correction data, have a image data correcting step of correcting the image data,
The ideal luminance distribution and / or ideal chromaticity distribution calculating step includes:
Smoothing the luminance distribution and / or chromaticity distribution to calculate a smoothed luminance distribution and / or smoothed chromaticity distribution;
Performing a reduction scaling process of luminance and / or chromaticity on the smoothed luminance distribution and / or smoothed chromaticity distribution;
Performing a luminance and / or chromaticity shift process on the smoothed luminance distribution and / or the smoothed chromaticity distribution subjected to the reduction scaling process, and a method for correcting luminance unevenness and / or color unevenness, . A display device having a function of correcting luminance unevenness and / or color unevenness,
Luminance distribution and / or chromaticity distribution acquisition means for photographing a display screen when a predetermined evaluation image is displayed on the display device and acquiring the luminance distribution and / or chromaticity distribution on the display screen;
Ideal luminance distribution and / or ideal chromaticity distribution calculating means for calculating an ideal luminance distribution and / or ideal chromaticity distribution in the display device from the luminance distribution and / or chromaticity distribution;
Luminance unevenness and / or color unevenness correction data calculation means for calculating the luminance unevenness and / or color unevenness correction data based on the ideal luminance distribution and / or ideal chromaticity distribution and the luminance distribution and / or chromaticity distribution. When,
A storage device for storing brightness unevenness and / or color unevenness correction data calculated by the brightness unevenness and / or color unevenness correction data calculating means;
Image data correction means for correcting image data based on the luminance unevenness and / or color unevenness correction data;
Possess an image display unit,
The ideal luminance distribution and / or ideal chromaticity distribution calculating means includes:
Smoothing the luminance distribution and / or chromaticity distribution to calculate a smoothed luminance distribution and / or smoothed chromaticity distribution;
A reduction scaling process of luminance and / or chromaticity is performed on the smoothed luminance distribution and / or the smoothed chromaticity distribution,
A display device characterized by performing luminance and / or chromaticity shift processing on the smoothed luminance distribution and / or smoothed chromaticity distribution subjected to the reduction scaling processing .