JP4681033B2 - Image correction data generation system, image data generation method, and image correction circuit - Google Patents

Image correction data generation system, image data generation method, and image correction circuit Download PDF

Info

Publication number
JP4681033B2
JP4681033B2 JP2008227139A JP2008227139A JP4681033B2 JP 4681033 B2 JP4681033 B2 JP 4681033B2 JP 2008227139 A JP2008227139 A JP 2008227139A JP 2008227139 A JP2008227139 A JP 2008227139A JP 4681033 B2 JP4681033 B2 JP 4681033B2
Authority
JP
Japan
Prior art keywords
image
data
signal
display panel
image correction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2008227139A
Other languages
Japanese (ja)
Other versions
JP2010057149A (en
JP2010057149A5 (en
Inventor
坂本  隆
明男 太田
哲彦 新保
浩 村瀬
重治 石川
Original Assignee
株式会社イクス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
Priority to JP2008197876 priority Critical
Application filed by 株式会社イクス filed Critical 株式会社イクス
Priority to JP2008227139A priority patent/JP4681033B2/en
Publication of JP2010057149A publication Critical patent/JP2010057149A/en
Publication of JP2010057149A5 publication Critical patent/JP2010057149A5/ja
Application granted granted Critical
Publication of JP4681033B2 publication Critical patent/JP4681033B2/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41610452&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JP4681033(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00Diagnosis, testing or measuring for television systems or their details
    • H04N17/02Diagnosis, testing or measuring for television systems or their details for colour television signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00Diagnosis, testing or measuring for television systems or their details
    • H04N17/04Diagnosis, testing or measuring for television systems or their details for receivers
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0233Improving the luminance or brightness uniformity across the screen
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0242Compensation of deficiencies in the appearance of colours
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0285Improving the quality of display appearance using tables for spatial correction of display data
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0693Calibration of display systems
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G09G2360/147Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals

Description

The present invention relates to an image correction data generation system for efficiently suppress the display unevenness, an image correction data generation side Ho及 beauty image correction circuit.

  Today, a production line for a display such as a liquid crystal panel is constructed so as to realize uniform quality. However, even in such a production line, manufacturing variations occur in individual displays. Therefore, various studies have been made to adjust a display that outputs a better image (see, for example, Patent Document 1). In the technique described in Patent Document 1, the image quality of the adjustment target device is adjusted to approximate the image quality of the target device. Therefore, the control unit of the image quality adjustment device includes a data storage unit that stores characteristic data of the reference device and the target device. The control unit calculates gamma / white balance conversion data based on the data stored in the data storage unit, and stores it in the gamma adjuster. Then, the control unit calculates color management setting profile data using the data stored in the data storage unit and the gamma / white balance conversion data, and stores the calculated color management setting profile data in the color management adjuster.

In addition, display unevenness may occur on the display. Such display unevenness is caused by uneven brightness of each pixel. If the RGB brightness of each pixel is partially equal on the display, uneven brightness occurs, and if the brightness of each pixel is different, color unevenness occurs. Moreover, both may occur simultaneously. Accordingly, a projector for correcting the color unevenness of the liquid crystal panel and at the same time removing the brightness unevenness caused by the integrator optical system to obtain a high-quality projected image quality has been studied (for example, see Patent Document 2). . In the technique disclosed in Patent Document 2, luminance unevenness correction generated using a luminance unevenness measuring camera with known shading is added to the color unevenness correcting LUT data by a normal color unevenness measuring camera used in the conventional method. Add LUT data. Thus, illuminance unevenness correction LUT data for correcting the two-dimensional color unevenness and luminance unevenness in the horizontal / vertical direction of the liquid crystal panel according to the illuminance level of the input video signal is generated. Using the illuminance unevenness correction data stored in the LUT in the liquid crystal projector apparatus, two-dimensional color unevenness and brightness unevenness are corrected and converted into a uniform image.
Japanese Patent No. 4109702 (first page, FIG. 1) JP 2006-153914 A (first page, FIG. 1)

  When a completely flat image (all pixels have the same value) is input to the display, ideally a completely flat image is output. In reality, however, the brightness of each pixel is slightly different, which appears as uneven display. The cause of such display unevenness in the liquid crystal panel depends on the unevenness of the cell gap and the brightness distribution of the backlight.

If these display unevenness is uniformly removed, inconvenience may occur. In other words, the unevenness of the liquid crystal itself is 1% or less, and when it is large, it is about 5%. When correcting such display unevenness, the data value cannot be corrected for a complete white (100% gray) image and cannot be further brightened. Therefore, when the correction for uniformly removing the display unevenness is performed, the luminance near the central portion is lowered due to the influence of the peripheral dimming in the liquid crystal panel. That is, when it is large, the brightness of the panel is reduced by 30%.

In addition, when correction is performed for each individual display, it is desirable that correction can be performed as efficiently as possible.
The present invention has been made to solve the above problems, the image correction data generation system for efficiently suppress display unevenness, providing image correction data generation side Ho及 beauty image correction circuit There is to do.

In order to solve the above problems, the imaging invention according to claim 1, for taking a signal generating means for supplying to the display panel a signal for outputting the images, an output image displayed in the display panel and means, an image correction data generation system and a control means connected to said signal generating means and the imaging means, said control means, to said signal generating means, common to the entire surface of the display panel An instruction means for outputting a signal value supply instruction, an image acquisition means for acquiring output image data from the imaging means, and bandpass filtering for separating only intermediate frequency components from the output image data. by Ukoto, a bandpass filter means for calculating a band-pass data excluding high-frequency components and low frequency components from the output image data, the bandpass data And summarized in that and a correction data generating means for outputting a corresponding image correction table.

  According to a second aspect of the present invention, in the image correction data generation system according to the first aspect, the instruction unit outputs a signal value supply instruction common to the entire surface of the display panel for each gradation, and the image acquisition is performed. The gist is that the means acquires output image data for each gradation, and the correction data generation means outputs an image correction table for each gradation.

The invention according to claim 3, a signal generating means for supplying signals to the display panel for outputting the images, and imaging means for capturing an output image displayed in the display panel, said signal generating means and the with a control means connected to the imaging means, the image correction data generation system having a a method of producing an image correction data, said control means, to said signal generating means, the display panel entirely An instruction step for outputting a common signal value supply instruction, an image acquisition step for acquiring output image data from the imaging means, and bandpass filtering for separating only intermediate frequency components from the output image data. rows of a band-pass filtering step of calculating the band-pass data excluding high-frequency components and low frequency components from the output image data by Ukoto, said bar And summarized in that to perform the correction data generating step of outputting the image correction table corresponding to Dopasudeta.

According to a fourth aspect of the present invention, there is provided an image correction circuit storing an image correction table for adjusting an image signal supplied to a display panel, wherein the image correction table is generated corresponding to bandpass data. The band pass data is an intermediate frequency component with respect to output image data obtained by capturing an output image displayed on the display panel based on a common signal value supplied to the entire surface of the display panel. only bandpass filtering lines Do I to separate, obtained by the same output image data excluding high-frequency components and low frequency components, the image signal supplied to the display panel, based on the image correction table Te, by outputting a signal for correcting the output image, and gist and Turkey to adjust the output image of the display panel.

  According to a fifth aspect of the present invention, in the image correction circuit according to the fourth aspect, the image correction table is recorded for each gradation, and is linearly interpolated based on the coordinates of the image signal and the signal value to be output. The gist is to generate a signal for adjusting an image.

(Function)
According to the first or third aspect of the invention, the control means outputs a signal value supply instruction common to the entire surface of the display panel to the signal generating means. And output image data is acquired from an imaging means. Then, by the band-pass filtering of the rows Ukoto separating only intermediate frequency components to output image data, high frequency components and low frequency formed from the same output image data
Band pass data excluding the minute is calculated, and an image correction table corresponding to the band pass data is output. Thereby, an image correction table can be generated based on the photographed image. Here, by performing band-pass filtering, display unevenness that changes slowly and fine display unevenness are not corrected. Therefore, it is possible to eliminate the influence of peripheral dimming and reduce display unevenness easily and efficiently.

  According to the second aspect of the present invention, a signal value supply instruction common to the entire surface of the display panel is output for each gradation, output image data is acquired for each gradation, and an image correction table is stored for each gradation. Output. Thus, an accurate image correction table can be generated even when the display unevenness varies depending on the gradation.

According to the fourth aspect of the present invention, the image correction circuit stores an image correction table for adjusting an image signal supplied to the display panel. The image correction table is generated corresponding to the band pass data, and the band pass data captures an output image displayed on the display panel based on a common signal value supplied to the entire surface of the display panel. bandpass filtering to separate only intermediate frequency components relative-obtained output image data lines Do I, Ru obtained by the same output image data excluding high-frequency components and low frequency components. Then, a signal for correcting the output image is output based on the image correction table with respect to the image signal supplied to the display panel. As a result, the image quality of the display panel in which display unevenness occurs can be improved.

According to the invention described in claim 5, the image correction table is recorded for each gradation, and a signal for adjusting the output image is generated by performing linear interpolation based on the coordinates and signal values of the image signal. . Thereby, even when the display unevenness varies depending on the gradation, the image quality of the display panel can be improved.

According to the present invention, it is possible to provide the image correction data generation system for efficiently suppress the display unevenness, the image correction data generation side Ho及 beauty image correction circuit.

Hereinafter, the image correction data generation system of the present invention, the image correction data generating side Ho及 beauty image correction circuit will be described. In the present embodiment, it is assumed that image quality is improved by suppressing display unevenness (brightness unevenness) of the display panel to be adjusted. In the present embodiment, the liquid crystal panel 10 is used as a display panel to be adjusted.

  The liquid crystal panel 10 includes a liquid crystal (liquid crystal unit) sandwiched between transparent electrodes and a backlight that illuminates the liquid crystal from the back. Therefore, the liquid crystal panel 10 outputs an image in which the unevenness of the liquid crystal unit and the peripheral light reduction of the backlight are superimposed.

  In order to improve the image quality of the liquid crystal panel 10, a correction circuit 50 is used as shown in FIG. The correction circuit 50 includes a nonvolatile memory (ROM 51) for recording an image correction table.

  The ROM 51 stores data (image correction table) relating to correction values for adjusting the signal value of the input image signal. In the present embodiment, a planar distribution of correction values is recorded for each reference gradation.

  As shown in FIG. 1, the image correction data generation system for calculating the correction value includes an image quality adjustment device 20, a photographing camera 30, a test pattern generation device 40, and a ROM writer 60.

  Here, the imaging camera 30 as an imaging unit captures an image displayed on the liquid crystal panel 10 and supplies output image data to the image quality adjustment device 20. In the present embodiment, a monochrome camera having a CCD element is used as the photographing camera 30. Then, the image displayed on the liquid crystal panel 10 is taken.

  The test pattern generation device 40 as a signal generation means supplies a test pattern signal to the liquid crystal panel 10 based on an instruction from the image quality adjustment device 20. In the present embodiment, 8-bit RGB signals are supplied to the entire surface of the liquid crystal panel 10.

The ROM writer 60 writes correction value data output from the image quality adjustment device 20 in the ROM 51.
The image quality adjustment device 20 is a computer terminal that executes processing for calculating a correction value for adjusting the image quality of the liquid crystal panel 10.

  The image quality adjustment device 20 includes a control unit 21. The control unit 21 includes a CPU, a RAM, a ROM, and the like as control means, and will be described later (an instruction stage for outputting a common signal value supply instruction, an image acquisition stage, a bandpass filtering stage, a correction data generation stage) Etc.). By executing the correction table generation program for this purpose, the control unit 21 functions as a process management unit 211 and a band pass filter unit 212 as shown in FIG.

  The process management unit 211 functions as an instruction unit, an image acquisition unit, and a correction data generation unit. Specifically, a signal to be input to the liquid crystal panel 10 is controlled, and a process for calculating a correction value based on output image data displayed on the liquid crystal panel 10 is executed.

  The bandpass filter unit 212 generates bandpass data from which the gentle change component and the fine change component are deleted from the output image data acquired from the photographing camera 30. That is, bandpass filtering is performed to separate only intermediate frequencies.

(Correction data generation process)
Next, the correction data generation process will be described with reference to FIG.
Here, an image correction table for suppressing display unevenness is generated for each predetermined gradation. Specifically, the distribution of correction values on the liquid crystal panel 10 is calculated for each preset gradation (reference gradation). In the present embodiment, a predetermined number (for example, 10 levels) of reference gradations are used in a signal value expressed in 8 bits, and the adjustment target gradations corresponding to the reference gradations are sequentially changed and adjusted for each stage. An image correction table is generated for each target gradation.

  First, the control unit 21 of the image quality adjustment apparatus 20 executes a test pattern generation process (step S1). Specifically, the process management unit 211 of the control unit 21 instructs the test pattern generation device 40 to output an RGB signal for outputting an image of the gradation to be adjusted. Here, in the gradation to be adjusted, signals having the same R signal value, G signal value, and B signal value (common signal values) are used for the entire surface of the liquid crystal panel 10. In response to this instruction, the test pattern generator 40 supplies the liquid crystal panel 10 with an 8-bit RGB signal that is the gradation to be adjusted.

  In response to this, the liquid crystal panel 10 outputs a gray image of the adjustment target gradation. In this case, when the liquid crystal has uneven cell gaps or uneven backlights, the liquid crystal panel 10 has display unevenness in which these unevennesses are superimposed. Here, the photographing camera 30 is photographing an image on which display unevenness is superimposed.

  And the control part 21 of the image quality adjustment apparatus 20 performs the acquisition process of an output image (step S2). Specifically, the process management unit 211 of the control unit 21 captures output image data obtained by photographing the liquid crystal panel 10 from the photographing camera 30. Then, the process management unit 211 converts the output image data into a luminance distribution for each block composed of 8 × 8 pixels, and supplies it to the bandpass filter unit 212.

  Next, the control unit 21 of the image quality adjustment apparatus 20 performs a bandpass filtering process (step S3). Specifically, the bandpass filter unit 212 of the control unit 21 calculates bandpass data by performing bandpass filtering on the acquired output image data. This band pass data is composed of a distribution excluding high frequency components and low frequency components according to the in-plane luminance distribution of the liquid crystal panel 10. The bandpass filter unit 212 supplies the generated bandpass data to the process management unit 211.

  Next, the control unit 21 of the image quality adjustment apparatus 20 executes a correction value calculation process (step S4). Specifically, the process management unit 211 of the control unit 21 generates an image correction table in which bandpass data is inverted. Further, the process management unit 211 temporarily stores an image correction table in the memory in association with an identifier that specifies the adjusted reference gradation.

And the control part 21 of the image quality adjustment apparatus 20 repeats the process mentioned above about the following adjustment object gradation.
When the calculation of the correction data for all the reference gradations is completed, the control unit 21 of the image quality adjustment device 20 executes a ROM writing process (step S5). Specifically, the process management unit 211 of the control unit 21 writes the temporarily stored image correction table in the ROM 51. As a result, the distribution of correction values is recorded in the ROM 51 with respect to the block position (xy coordinates) in the plane of the liquid crystal panel 10 for each reference gradation.

(Image display processing)
The ROM 51 generated corresponding to the liquid crystal panel 10 is incorporated in the correction circuit 50. This correction circuit is a circuit for adjusting the image signal supplied to the liquid crystal panel 10. Specifically, an image signal (RGB signal) for displaying an image on the liquid crystal panel 10 is supplied to the correction circuit 50 together with the liquid crystal panel 10.

As shown in FIG. 3, the correction circuit 50 includes a selection / interpolation unit 52 and an addition unit 53 in addition to the ROM 51.
The selection / interpolation means 52 refers to the image correction table recorded in the ROM 51 for each RGB signal. Here, the selection / interpolation means 52 is a correction determined by four block grid points surrounding the pixel position (xy coordinate) of the image signal in the image correction table of two reference gradations adjacent to each RGB signal value of the image signal. A value (2 × 4 = 8) is acquired. Then, the selection / interpolation means 52 performs linear interpolation on the acquired correction value according to the distance between the signal value of the image signal and each grid point.

  Then, the adding unit 53 adds the correction value acquired from the selecting / interpolating unit 52 to the input image signal. The liquid crystal panel 10 acquires the corrected image signal and displays an image.

According to this embodiment, the following effects can be obtained.
In the present embodiment, the correction circuit 50 includes a ROM 51, a selection / interpolation unit 52, and an addition unit 53. In the ROM 51, an image correction table generated from display unevenness in an image photographed by the photographing camera 30 is recorded. Display unevenness occurs because the brightness of each pixel is different from the ideal value. If the deviation from the ideal value of each pixel is measured in advance, the input image value to each pixel is corrected according to the deviation. The display unevenness can be canceled with.

  In the present embodiment, an image correction table is recorded in the ROM 51 for each reference gradation. The occurrence of display unevenness is not constant with respect to the input level even for the same pixel. For example, a pixel in which 19% gray is displayed when 20% gray is input may change such that 51% gray is displayed in 50% gray and 83% gray is displayed in 80% gray. . Since an image correction table is recorded in the ROM 51 for each reference gradation, correction according to the signal value of each pixel can be performed.

  In this embodiment, an image correction table is generated using a distribution obtained by performing bandpass filtering. Thereby, correction is not performed for a gradual change in luminance. The unevenness of the liquid crystal itself may be about 1% or less, and about 5% even when there are many, whereas the backlight peripheral dimming may be about 30% when there are many. If correction is performed without removing low frequency components (low cut), the luminance near the center is reduced due to the influence of the peripheral dimming on the liquid crystal panel 10 for a complete white (100% gray) image. I will let you.

  In such a case, a gentle change in the amount of light on the entire screen is difficult to be detected by the human eye, and only a drop in the brightness of the liquid crystal panel 10 due to the correction without performing the low cut is noticeable.

  In addition, very fine unevenness (a component having a high spatial frequency) is hardly detected by human eyes. Further, in order to correct very fine display unevenness (high frequency component), it is necessary to accurately correlate the measurement image and the pixel position of the liquid crystal. If even a slight deviation occurs, display unevenness is created. Therefore, an image correction table can be generated easily and efficiently by removing high frequency components (high cut).

Moreover, you may change the said embodiment as follows.
In the above embodiment, the luminance unevenness is corrected using a monochrome camera. The display unevenness to be suppressed is not limited to luminance, and can be applied to correction of color unevenness. When correcting both luminance unevenness and color unevenness, output images are acquired by the imaging means using RGB three optical filters. Then, a correction value is calculated from each image by the bandpass filtering process (step S3) and the correction value calculation process (step S4). Then, three types of image correction tables for R signal, G signal, and B signal are created and recorded in the ROM 51. As a result, the RGB data value of the input image can be corrected to suppress color unevenness.

  In the above embodiment, the luminance nonuniformity is corrected by evaluating an image in which RGB signal values are matched. When correcting the color unevenness, an optical filter is not used, but a single color R signal, G signal, and B signal are independently supplied to the liquid crystal panel 10 to obtain an output image (step S2). It is also possible to generate an image correction table by bandpass filtering processing (step S3) and correction value calculation processing (step S4).

  In the above embodiment, the present invention is applied to suppress the display unevenness of the liquid crystal panel 10, but the display panel to be adjusted is not limited to this. The present invention can also be applied to an image output device such as a plasma display (PDP), a projection projector, or the like.

In the above embodiment, the test pattern generation process (step S1) to the ROM writing process (step S5) are executed for each liquid crystal panel 10 to be adjusted. Instead, a typical correction value may be calculated by executing a test pattern generation process (step S1) to a correction value calculation process (step S4) on a typical display panel to be adjusted. Good. Then, a ROM in which this representative correction value is written is manufactured and incorporated in the correction circuit 50.

  For example, the present invention can be applied when correcting luminance unevenness (display unevenness) for a light source (backlight) in a typical liquid crystal panel. In the liquid crystal panel, when the number of backlights is reduced, the diffusion sheet is removed, or the distance between the diffusion plate and the lamp is shortened, uneven brightness due to the backlight occurs. By performing the image correction of the present invention on the liquid crystal panel in which the luminance unevenness due to the backlight occurs in this way, the display unevenness can be suppressed. As a result, by reducing the number of parts constituting the display panel, such as by reducing the number of lamps, the cost can be reduced and a high-quality display panel can be manufactured. In addition, when the number of lamps is reduced, the amount of light from the backlight decreases. However, by removing the optical sheet, etc., or by reducing the distance between the lamp and the diffuser, uniform brightness can be achieved while adjusting the amount of light. Can be maintained.

  Furthermore, it is also possible to apply the image correction of the present invention individually for each panel to such a representative correction value. Then, ROM writing processing is executed for each correction value. In this case, display unevenness based on the characteristics of the individual display panels can be suppressed, and a higher quality display panel can be manufactured. That is, rough correction is performed by typical image correction, and further fine adjustment is performed for each display panel, whereby image correction can be performed efficiently.

Explanatory drawing of the image correction data generation method of one Embodiment of this invention. Explanatory drawing of a correction data generation process. Explanatory drawing of the correction circuit of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Liquid crystal panel, 20 ... Image quality adjusting device, 21 ... Control part, 211 ... Process management means, 212 ... Band pass filter means, 30 ... Imaging camera, 40 ... Test pattern generator, 50 ... Correction circuit, 51 ... ROM.

Claims (5)

  1. Signal generating means for supplying a signal for outputting an image to the display panel;
    Imaging means for capturing an output image displayed on the display panel;
    An image correction data generation system comprising: the signal generation unit and a control unit connected to the imaging unit;
    The control means is
    Instruction means for outputting a signal value supply instruction common to the entire surface of the display panel to the signal generating means;
    Image acquisition means for acquiring output image data from the imaging means;
    Bandpass filter means for calculating bandpass data obtained by removing high frequency components and low frequency components from the output image data by performing bandpass filtering for separating only intermediate frequency components for the output image data;
    An image correction data generation system comprising correction data generation means for outputting an image correction table corresponding to the bandpass data.
  2. The instruction means outputs a signal value supply instruction common to the entire surface of the display panel for each gradation,
    The image acquisition means acquires output image data for each gradation,
    The image correction data generation system according to claim 1, wherein the correction data generation unit outputs an image correction table for each gradation.
  3. Signal generating means for supplying a signal for outputting an image to the display panel;
    Imaging means for capturing an output image displayed on the display panel;
    A method of generating image correction data using an image correction data generation system comprising: the signal generation means and a control means connected to the imaging means;
    The control means is
    An instruction step of outputting a signal value supply instruction common to the entire surface of the display panel to the signal generating means;
    An image acquisition step of acquiring output image data from the imaging means;
    A bandpass filtering step of calculating bandpass data obtained by removing high frequency components and low frequency components from the output image data by performing bandpass filtering for separating only intermediate frequency components for the output image data;
    And a correction data generation step of outputting an image correction table corresponding to the bandpass data.
  4. An image correction circuit storing an image correction table for adjusting an image signal supplied to a display panel,
    The image correction table is generated corresponding to bandpass data, and the bandpass data captures an output image displayed on the display panel based on a common signal value supplied to the entire surface of the display panel. It is obtained by performing band-pass filtering that separates only intermediate frequency components from the output image data obtained by removing high frequency components and low frequency components from the output image data,
    An image correction circuit for adjusting an output image of the display panel by outputting a signal for correcting an output image based on the image correction table with respect to an image signal supplied to the display panel.
  5.   5. The image correction table is recorded for each gradation, and a signal for adjusting an output image is generated by performing linear interpolation based on a coordinate and a signal value of an image signal. Image correction circuit.
JP2008227139A 2008-07-31 2008-09-04 Image correction data generation system, image data generation method, and image correction circuit Active JP4681033B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2008197876 2008-07-31
JP2008227139A JP4681033B2 (en) 2008-07-31 2008-09-04 Image correction data generation system, image data generation method, and image correction circuit

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP2008227139A JP4681033B2 (en) 2008-07-31 2008-09-04 Image correction data generation system, image data generation method, and image correction circuit
CN201410370128.7A CN104217666B (en) 2008-07-31 2009-07-29 Image quality adjustment device, image correction circuit and display panel
PCT/JP2009/063511 WO2010013753A1 (en) 2008-07-31 2009-07-29 Image correction data generation system, image correction data generation method, image correction data generation program, and image correction circuit
CN200980119693.3A CN102150197B (en) 2008-07-31 2009-07-29 Image correction data generation system, image correction data generation method, image correction data generation program, and image correction circuit
KR20107025226A KR101165026B1 (en) 2008-07-31 2009-07-29 Image correction data generation system, image correction data generation method, image correction data generation program, and image correction circuit
TW101119774A TWI520126B (en) 2008-07-31 2009-07-30 Image correction data generating system, image correction data generating method, image correction data generating program and image correction circuit
TW098125754A TWI485695B (en) 2008-07-31 2009-07-30 Image correction data generating system, image correction data generating method, image correction data generating program and image correction circuit

Publications (3)

Publication Number Publication Date
JP2010057149A JP2010057149A (en) 2010-03-11
JP2010057149A5 JP2010057149A5 (en) 2010-11-11
JP4681033B2 true JP4681033B2 (en) 2011-05-11

Family

ID=41610452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008227139A Active JP4681033B2 (en) 2008-07-31 2008-09-04 Image correction data generation system, image data generation method, and image correction circuit

Country Status (5)

Country Link
JP (1) JP4681033B2 (en)
KR (1) KR101165026B1 (en)
CN (2) CN104217666B (en)
TW (2) TWI520126B (en)
WO (1) WO2010013753A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013250570A (en) * 2008-07-31 2013-12-12 Iix Inc Image quality adjusting device and image correction data generation program

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4777472B1 (en) * 2010-08-24 2011-09-21 株式会社イクス Image correction data generation system, display correction data generation method, and image correction data generation program for display panel using non-polished glass
JP2012053579A (en) * 2010-08-31 2012-03-15 Iix Inc Production management system and production management method
JP5113232B2 (en) * 2010-09-08 2013-01-09 株式会社イクス Panel evaluation system and panel evaluation method
JP2012085225A (en) * 2010-10-14 2012-04-26 Iix Inc Image quality adjustment system and image quality adjustment method
KR101784216B1 (en) 2011-02-14 2017-10-12 삼성디스플레이 주식회사 Compensation table generating system, display apparatus having brightness compensating table and method of generating compensation table
JP2012048206A (en) * 2011-06-27 2012-03-08 Iix Inc Image correction data generation system for display panel using unpolished glass, image correction data generation method, and image correction data generation program
JPWO2013038560A1 (en) * 2011-09-16 2015-03-23 Necディスプレイソリューションズ株式会社 Display device and method for correcting unevenness of display device
JP5919370B2 (en) 2012-03-01 2016-05-18 株式会社日本マイクロニクス Method and apparatus for detecting display unevenness of display device
CN104160439B (en) 2012-03-01 2017-03-01 日本麦可罗尼克斯股份有限公司 The uneven detection method of display of display device and its device
JP2012186825A (en) * 2012-04-24 2012-09-27 Iix Inc Image quality adjustment device, image quality adjustment system, and image quality adjustment method
WO2014050222A1 (en) * 2012-09-25 2014-04-03 株式会社イクス Image quality adjustment device, correction data generation method, and image quality adjustment technique utilizing same
JP5634473B2 (en) * 2012-10-11 2014-12-03 株式会社イクス Panel evaluation system and panel evaluation method
JP2014086996A (en) 2012-10-26 2014-05-12 Iix Inc Picture quality adjustment device, picture quality adjustment circuit (ic), and display panel
CN105103539A (en) * 2013-02-19 2015-11-25 宜客斯股份有限公司 Correction data generation method, correction data generation system, and image quality adjustment technique using correction data generation method and correction data generation system
WO2014128821A1 (en) 2013-02-19 2014-08-28 株式会社イクス Pattern position detection method, pattern position detection system, and image quality adjustment technique using pattern position detection method and pattern position detection system
JP5952811B2 (en) * 2013-04-08 2016-07-13 株式会社イクス Luminance measuring method, luminance measuring apparatus, and image quality adjustment technology using them
JP6243030B2 (en) * 2014-07-15 2017-12-06 株式会社イクス Image processing method and image processing apparatus for executing the image processing method
JP6588700B2 (en) 2014-12-09 2019-10-09 株式会社メガチップス Correction data generation method, image correction apparatus, image correction method, and image correction system
KR102040746B1 (en) 2015-03-20 2019-11-05 후아웨이 테크놀러지 컴퍼니 리미티드 Display Mura calibration method, apparatus, and system
CN106612355A (en) * 2015-10-23 2017-05-03 宁波舜宇光电信息有限公司 Mobile phone camera module monomer correction production line production method and system thereof
EP3435055A4 (en) * 2016-04-28 2019-08-21 Iix Inc Irregularity evaluating method and irregularity evaluating device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001324960A (en) * 2000-03-10 2001-11-22 Ngk Insulators Ltd Display system and display management method
WO2003071794A1 (en) * 2002-02-19 2003-08-28 Olympus Corporation Image correction data calculation method, image correction data calculation device, and projection system
JP2007086581A (en) * 2005-09-26 2007-04-05 Seiko Epson Corp Image processing apparatus, electrooptical device, electronic equipment, and data generating method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3672586B2 (en) * 1994-03-24 2005-07-20 株式会社半導体エネルギー研究所 Correction system and operation method thereof
JPH1141629A (en) * 1997-07-15 1999-02-12 Minolta Co Ltd Calibration pattern display device and display characteristics measuring device for a color display device applied with the calibration pattern display device
JP2000181407A (en) * 1998-12-10 2000-06-30 Fujitsu Ltd Liquid crystal display device
TWI220689B (en) * 2002-12-27 2004-09-01 Ind Tech Res Inst An inspection system and method for the inspection of a display device
TWM244536U (en) * 2003-08-21 2004-09-21 Etoms Electronics Corp 2D detection and displacement judging architecture having neural network
JP2006074155A (en) * 2004-08-31 2006-03-16 Mitsubishi Electric Corp Device and method for image processing, and image display device
TWI273232B (en) * 2004-09-27 2007-02-11 Kubotek Corp Optical inspection system and method thereof for operating a plurality of defect inspection operations to a substrate
JP4438696B2 (en) * 2005-06-15 2010-03-24 セイコーエプソン株式会社 Image display apparatus and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001324960A (en) * 2000-03-10 2001-11-22 Ngk Insulators Ltd Display system and display management method
WO2003071794A1 (en) * 2002-02-19 2003-08-28 Olympus Corporation Image correction data calculation method, image correction data calculation device, and projection system
JP2007086581A (en) * 2005-09-26 2007-04-05 Seiko Epson Corp Image processing apparatus, electrooptical device, electronic equipment, and data generating method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013250570A (en) * 2008-07-31 2013-12-12 Iix Inc Image quality adjusting device and image correction data generation program

Also Published As

Publication number Publication date
TW201011731A (en) 2010-03-16
CN102150197A (en) 2011-08-10
TWI520126B (en) 2016-02-01
TWI485695B (en) 2015-05-21
CN104217666A (en) 2014-12-17
KR101165026B1 (en) 2012-07-13
CN102150197B (en) 2014-08-20
JP2010057149A (en) 2010-03-11
TW201239870A (en) 2012-10-01
WO2010013753A1 (en) 2010-02-04
CN104217666B (en) 2017-01-11
KR20110002474A (en) 2011-01-07

Similar Documents

Publication Publication Date Title
CN100589583C (en) Method for correcting multi-screen connected wall
JP3659065B2 (en) Image display device
US6804406B1 (en) Electronic calibration for seamless tiled display using optical function generator
CN101861618B (en) Image display device and image display method
DE69812696T2 (en) Method and device for adjusting one or more projectors
JP2007034251A (en) Display apparatus and display method
CN101286300B (en) Display apparatus and method for adjusting brightness thereof
RU2471214C2 (en) Apparatus for controlling liquid crystal display, liquid crystal display, method of controlling liquid crystal display, program and data medium
CN1231805C (en) Image display means
US9135864B2 (en) Systems and methods for accurately representing high contrast imagery on high dynamic range display systems
CN100498433C (en) Flat display panel, manufacturing method thereof, and manufacturing apparatus thereof
US20080043117A1 (en) Method and Apparatus for Compensating Image Sensor Lens Shading
JP3766672B2 (en) Image correction data calculation method
EP2285125A2 (en) Display device, display method and computer program
JP3719317B2 (en) Interpolation method, interpolation circuit, and image display device
US20120044277A1 (en) Brightness control apparatus and brightness control method
US8777418B2 (en) Calibration of a super-resolution display
US8442316B2 (en) System and method for improving color and brightness uniformity of backlit LCD displays
US7614753B2 (en) Determining an adjustment
JP2008102379A (en) Image display device and method
US20080036872A1 (en) Image processing system, display device, program, and information recording medium
KR20080080040A (en) Image display apparatus and electronic apparatus
US8497872B2 (en) White balance correction method
CN101692326B (en) System and method for on-site point-by-point calibration of brightness and chrominance of the whole screen of LED display screen
WO2004111989A1 (en) Tone reproduction characteristics measuring device for color monitor

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100924

A871 Explanation of circumstances concerning accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A871

Effective date: 20100924

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20100924

A975 Report on accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A971005

Effective date: 20101013

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101026

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101206

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110104

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110203

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140210

Year of fee payment: 3

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: R3D02

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140210

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250