TW469734B - Display characteristic measurement device for CRT and the calibration method therefor - Google Patents

Abstract

To reduce a time and labor in the case of calibration of a display characteristic measurement device for a CRT. In the case of calibrating a display characteristic measurement device 1, a color display device 4 of a measured object applies white light emission to a calibration chart to display a prescribed calibration pattern, an image pickup device 2 picks up the image to capture image data (luminance data). A control section 33 uses the image data and the calibration data stored in a calibration data storage section 34 to calculate a display characteristic and discriminates whether or not an error of the calculation result is within a prescribed permissible range. When the measured error is within a permissible range, the calibration data are set as new calibration data for measurement, and when the measured error is at the outside of the permissible range, calibration processing to newly set calibration data is conducted. When the measurement within a prescribed error range is possible by using known calibration data, the calibration processing can be omitted by using the calibration data.

Description

4 6 9 73 4 V. Description of the invention (1) [Technical field of the invention] The present invention relates to a test pattern of a color display device that is imaged and displayed on a color CRT (Cathode Ray Tube). A device for testing display characteristics such as convergence of an image signal, and in particular, a method for correcting the display characteristic test device. [Know-how] Display of the color component of the special test equipment, but the color will produce a positional display. This is due to the convergence of color display devices such as test monitors of known technology in graphics. Equivalent manifestation test devices are widely known. The display characteristic set includes: an imaging device that separates a test object display device into images of R (red), G (green), and β (blue) by using a predetermined test pattern in color and photographs them; an image processing device that processes A predetermined display special test such as parallel convergence of the images of the various color components taken by the camera; and a display device that displays the test results. Yes, because the display test characteristic device can capture the test pattern displayed by the camera with the imaging device and take in the test data, the optical characteristics of the device such as the spectral sensitivity and the difference between the imaging element and the geometric Test errors due to characteristics. :, In the case of testing a color display with calibration data different from the standard equipment (which is different from the luminous characteristics of the phosphor), the calibration data can be calibrated on the user side when testing the color display. Set the calibration data. 8 series display color display display test The slave of the Μ device is in the picture.

469 73 4 V. Description of the invention (2) The test system for the correction process when the device is used. As long as the color display 10 assembled during the assembly process of the manufacturing line is carried in the direction shown by the arrow R and set in a predetermined test area of the adjustment process, the imaging device 1 3 of the display characteristic test device 14 is configured to be The test area is visible from the test area side by leaving only a predetermined distance L. The field of view S of the imaging device j 3 is the display surface of the color display 1 0 even if it is arranged at any position in a predetermined test area so that it can be tested and set in a wide range. In the calibration process, the test object color display 10 or a color display 10 having the same light emission characteristics is arranged in a predetermined test area, and further, a diffusion plate u and a predetermined calibration chart are arranged in front of the display surface. 12, and the color display 10 is made to emit white in all colors to display a test pattern made of a plurality of white crosses. The diffusing plate 11 is used to diffuse the white light that is fully emitted by the color display 10 and uniformly illuminate the correction chart 12 from the back, and the correction chart 2 is formed from a rectangular light-shielding plate. For example, as shown in FIG. 9, When the plate surface is divided into 4 points, the center of each of the divided areas B1 to B4 and the center of the whole day surface are totaled at 5 intersections Q0, Q1 ', ..., Q4 to form a light-transmitting cross mark μ. As long as the color display 10 is fully white (ie, the phosphors of each color of r, G, and B are all illuminated), then the light of each color of R, G, and B can pass through the white light that is evenly mixed. A test pattern (cross pattern) made of a white cross can be displayed. Therefore, in the correction process, the position of the color display 10 is changed within the field of view of the imaging device 13, and five white cross-talks are recorded at each position.

Page 5 4 6 9 73 4

The display of the color display 10 can be calculated. 5. Description of the invention (3) Cross pattern 'and correction data for testing the characteristics of the camera image are used. The correction data in the convergence test is shown in Figure '. For example, in the field of view of the camera U, the upper and lower left and 11' are used to test the amount of error convergence, and the sum of these test values can be used to calculate the convergence. Calibration data during the test. Also, the error convergence amount is based on the horizontal center of gravity of each light emission of R, G, and B as Jrx, Jgx, Jbx. As long as the vertical center of gravity is Jrx 'JgX' Jbx ', for example, the horizontal direction is wrong. Convergence Crgx = 丨 Jrx-Jgx Cgbx = | JgX _ Jby, Cbrx = | Jbx _ Jrx False Convergence Crgy = | Jry-Jgy |, CgbyHJgy-Jby 丨 'Cbry = 丨 Jby-Jry 丨Define it. At each test position, you can calculate Qj (j = 〇, 1, ..., 4) about each intersection. 'You can calculate five error convergence amounts Crgxj, Cgbxj, Cbrxj, Cgbyj, Cbryj (j = 0, 1 4) 〇 The cross pattern shown in white by the color display 10, the diffuser plate 11, and the correction chart 12 is because the color components of R, G, and B are uniformly mixed, so it does not occur at the intersection Q The deviation between the R, G, and B color components of j. Therefore, the error convergence amounts Crgxj, Cgbxj, Cbrxj, Crgyj 'Cgbyj, Cbryj calculated using the cross-patterned camera image are calculated based on the error convergence amount of the imaging device 13 and the display characteristic test device 14' and are calculated based on the error convergence amount One set of calibration data was used in the convergence test. [Problems to be Solved by the Invention] In the CRT display characteristic device of the conventional technology, it is related to the test object.

4 b 9 734 V. Description of the invention (4) = When the luminous characteristics of the display 10 are different from those where the calibration is known, 'because the test device 10 is often used or the color display has the same luminous characteristics. $ &Amp; The subject's shirt color shows M, m C1. The shirt does not show 15 and it is necessary to obtain corrections. It takes time and techniques to correct the problem. Object ΐ In the case of the CRT manufacturing line, because the test position of test 2 = is in a certain test area, the first—make any color display in its test area configured can also test the display characteristics. The multiple position points in the test area 算出 = calculation of correction data 1 need to determine the final correction data by combining them, and the burden on the user for the correction process is very large. '^ The present invention is made in view of the above-mentioned problems. When a known calibration data is used, the calibration data is omitted by using the calibration data, and a CRT display characteristic test device and calibration capable of reducing the burden of calibration are provided. method. [Means for solving problems] The CRT display characteristic test device of the present invention has a calibration data storage device that can read and write the calibration data discarded by the calibration process, and `` uses a camera to display a predetermined test of the CRT of the test object The image of the scene 5 image obtained from the pattern and the calibration data stored in the calibration data storage device described above are used to calculate / explain the CRT display characteristics. 'Including: the computing device, before the regular calibration process, use the The CRT or the CRT is a CRT with the same light-emission characteristics, and the image signal obtained by illuminating a predetermined calibration chart formed by the camera to illuminate the `` phase calibration '' test pattern and the memory are stored in the above calibration times.

Memory device calibration data to calculate display characteristics; judgment device, I%

Page 7 aby 73 4 V. Explanation of the invention (5) The calculation result of the above calculation device is used to judge whether the correction data used for the calculation of the above display characteristics are appropriate; and the correction instruction device, as long as one judgment is made on the above correction which is split in the above judgment If the data is not suitable, it indicates the correction process (item 1 of the scope of patent application). In addition, the aforesaid display characteristics are characteristics concerning the convergence of the aforesaid CRT (item 6 in the scope of patent application). Further, "it further includes a display device", and the above-mentioned correction display device instructs the correction processing by promoting the display of the correction processing of the above-mentioned display device (item 2 of the scope of patent application). According to the above configuration, in the correction mode, a test pattern for correction formed by photographing and illuminating a predetermined correction pattern by a CRT having a light emission characteristic that is slightly the same as that of the test object CRT or the CRT, is used. The image signals constituting the j-camera image and the correction data stored in the correction data storage device can be used to calculate display characteristics such as the characteristics of convergence. Therefore, based on the calculation result (ie, the display characteristic test result), it is judged whether the correction data used for the calculation is appropriate as the correction data. As long as it is judged to be inappropriate, the crt display characteristic test for obtaining the test object is instructed. Correction processing of the correction data used. A display that causes correction processing to be performed on a display device, for example, is executed. Moreover, the present invention is in a CRT display characteristic test device, and further includes a correction data recording device. As long as the new correction data about the CRT of the test object is calculated according to the correction process according to the instruction of the correction instruction device, the correction data It is additionally recorded in the calibration data storage device, and the calibration instruction device only needs to judge that it is stored in the calibration data record.

469 73 4

If the full σ 卩 correction data of the hidden device is unsuitable, the correction process is instructed (item 3 of the patent scope). According to the above configuration, as long as new calibration data is calculated by the calibration process, the calibration data is additionally recorded in the calibration data storage device, and the calibration data is stored. Therefore, in the judgment of the appropriateness of the calibration data before the regular calibration process, all of the calibration data stored in the calibration data storage device are not suitable for testing the CRT display characteristics of the test object. When the data is positive, the instruction Correction processing for obtaining the calibration data for the crt display characteristic test of the test object. Moreover, the present invention is in a CRT display characteristic test device, and the above-mentioned determination means calculates whether the test value of the display characteristic calculated by the calculation device is within the allowable range of a preset error. When the allowable range is outside, it is judged that the correction data used in the calculation of the above-mentioned display characteristics is inappropriate (item 4 of the scope of patent application) ^ If the above constitution is used, the judgment of whether the correction data is appropriate is calculated by the calculation device. Whether the test value of the display characteristic is within the allowable range of the preset error, and when the test value is outside the allowable range, judge that the correction data used in the calculation of the display characteristic is inappropriate, and that the test value is within the allowable range At that time, the correction data is judged to be appropriate. Moreover, the present invention is in a CRT display characteristic test device, and includes a normal data setting device. As long as the judgment device judges that the correction data is appropriate, the test characteristic of the test object CRT will be judged as appropriate. The correction data is set as the correction data for the display characteristics (item 5 of the scope of patent application).

469734 V. Description of the invention (7) According to the above structure, in the judgment of the appropriateness of the correction data before the normal correction processing, as long as any of the correction data recorded by the correction data storage device is appropriate, the correction data It is set as the calibration data for testing crt, display = characteristic test, and the user can start the test of the CRT display characteristics of the test object without having to order the processing. In = Test ', as long as the camera is displayed on a predetermined test pattern of the test object, the image signal constituting the camera image and the correction data set in the judgment of correction judgment are used to calculate the display characteristics of the CRT. Furthermore, the calibration method of the CRT display characteristic test device of the present invention uses the image signal obtained by photographing a predetermined test pattern displayed on the CRT of the test object and the correction corresponding to the crt stored in the calibration data storage device to calculate the ατ display characteristic. 'Wherein' is a light test for the CRT with the correction data stored in the correction data storage device corresponding to the f correction data: CRTs with different luminous characteristics to obtain the correction data :: Calibration test 2 formed by a predetermined correction circle The correction data memorized by the positive data memory device is used to display the apparent characteristics, and based on the results of the compound pass, the judgment of the correctness of the correction data used for the operation of displaying the bismuth is displayed. Obtaining correction data (Patent application scope No. 7 and 1 Kui Huan Ϊ 乂 t display characteristics are about the convergence of the above-mentioned CRT characteristics (the scope of the patent scope No. 10).

According to the above-mentioned structure, on page 10, when the CRT with the light-emitting characteristics different from the light-emitting characteristics of the CRT corresponding to the correction data memorized in the correction data 469 73 4 V. Invention description (8) Memory device, Prior to this, a CRT with the CRT or a light-emission characteristic that is slightly the same as that of the CRT was used to take a picture to illuminate a predetermined calibration pattern " and formed a calibration test pattern ', and used the image signal and memory of the camera image The calibration data of the calibration data storage device can be used to calculate display characteristics such as convergence characteristics, and determine whether the calibration data used in the calculation of the display characteristics is appropriate or not based on the calculation results. Therefore, as long as it is judged that the correction data is not appropriate, it is instructed to obtain correction processing for the correction data of the CRT. In addition, the present invention is based on the CRT display characteristic test: 'the instruction to obtain the correction data of the root is corrected by the correction place = only = 2 off: test the new correction data for Jane, and then store the data in the school, and If all subsequent correction data is inappropriate, instruct school poverty 2 = item 8). Hoi Li (Shenqing Patent Scope Materials, constructing 'as long as the new calibration data is calculated by the calibration process; the materials are recorded in the calibration data storage device, and judged whether or not to go forward'. Calibration before the regular calibration process Correction of the data. Correction of the data. The correction data stored in the correction data storage device is not suitable for testing only correction data. It is instructed to use the CT display to correct the correction data. CRT display characteristics from .M or object Also, the present invention relates to a calibration method of a CRT display characteristic test device

469734

469734 V. Description of the Invention (ίο) Set the three-color decomposition 稜鏡 212 formed by dichroic 稜鏡 at the same time as the position of the emission surface of each color component of R, G, B of the three-color 稜鏡 212 A three-plate type color imaging device configured with solid-state imaging elements 213R, 213G, and 213B formed by a CCD area sensor of monochromatic light is used. The imaging camera 22 is also constructed using a three-plate type color imaging device similar to the imaging camera 21. In addition, the imaging device 2 is provided with an imaging control circuit 2 1 4 that controls the imaging operation of the solid-state imaging elements 213R, 213G, and 213B; and a signal processing circuit 216 that automatically adjusts the focus of the focus by driving the imaging lens 2 11 The image signals output from the control circuit 215 and the CCDs 213R, 213G, and 213B are subjected to predetermined image processing. The imaging control circuit 2 1 4 is controlled by an imaging control signal sent from the test device 3, and controls (: (; 1) 213R, 21 3G '21 3B's imaging operation (charge accumulation operation) based on the imaging control signal. Similarly, the imaging control circuit 224 is controlled by an imaging control signal sent from the test device 3, and controls the imaging operation of the CCDs 223R, 223G, and 223B based on the imaging control signal. Furthermore, the 'focus control circuit 2 1 5 is controlled by The focus f signal sent by the test device 3 is controlled, and based on the focus control signal, the photographic lens 2] 1 is moved to make a test chart displayed on the display surface of the color display 4, and the light image can be combined. In CC1) 213K, 213G, and 213β, the two focus control of each imaging surface is based on the focus control signal from the control section 33, and is performed by the formula π⑴ =. Similarly, the focus control circuit 225 is controlled by the focus control signal sent from the test device 3, and is based on the focus

The focus control signal moves the group 2 11 A before the photographic lens 211 so that the light image of the test pattern displayed on the display surface of the color display unit 4 can be imaged on each imaging surface of the CCDs 223R, 223G, and 223B. Although a three-plate type color imaging device is used in this embodiment, a single-plate type color imaging device may be used. In addition, although focus control can be performed using a captured image, if the range-finding sensor is set to, for example, the image-capturing cameras 2 1, 22, the image-capturing cameras 21, 22 and the color display 4 detected by the range-finding sensor are used. The distance data between the display surfaces can also be used for focus control of the photographic lenses 2 11, 2 21. The test device 3 is composed of: A / D converters 31A, 31B; frame memory 32A '32B; control section 33' calibration data storage section 34; ROM (Read Only Memory) 35; RAM (Random Access Memory) 36 A data input device 37; a data output device 38; and a display device 39. The A / D converters 31A and 31B convert the image signals (analog signals) input from the camera cameras 21 and 22 into image data of digital signals, respectively. The A / D converter 31A'31B has three A / D conversion circuits corresponding to the image signals of the respective color components of r, g, and β, and can convert the image data of each color component into an image signal.

Frame memory Zhao 32A and 32B will memorize the image data output from the A / D converters 31A and 31B, respectively. The frame memories 32A and 32B also have three frames of memory corresponding to the day image signal of each color component of R, G ′ B, and each color component can store image data. Since the control unit 33 controls the test operation of the convergence test device collectively, it is constituted by a microcomputer. The control section 33 is a functional block diagram as shown in FIG. 2

Page 14 4 6 9 734 5. In the description of the invention (12), there are: a test control section 331; an operation control section 332; a brightness center of gravity position calculation section 333; an error convergence amount calculation section 334; No judgment section 3 3 5. The test control section 3 31 controls a series of processing procedures related to the convergence test. The test control unit 3 31 is a series of controls that can display the calculation of the test pattern displayed on the color display 4 and the error convergence amount of the camera and the captured image based on the test pattern of the test device 3, and display the calculation result to one of the display device 39, etc. Test processing. Moreover, the processing can be controlled even with respect to the correction mode described later. Since the arithmetic control unit 3 3 2 controls various calculations related to the convergence test, it has: a test arithmetic control unit 33 2a that controls the operations in a normal convergence test; and a correction arithmetic control unit 3 3 2 b that controls the correction data The obtained operation. The brightness center of gravity position calculation unit 333 calculates the position of the brightness center of gravity of the test pattern at the time of calculating the error convergence amount for each R, G, and B color component. In addition, the error convergence amount calculation section 3 34 calculates the error convergence amount using the positions of the brightness centers of gravity of the R, G, and B colors calculated by the brightness center of gravity position calculation section 333 and the correction data stored in the correction data storage section 34. Here, the test about the amount of error convergence will be briefly explained. The amount of error convergence is shown in FIG. 3. The mesh shadow pattern 6 is displayed on the color display 4 of the test object, and the test area A (l) ~ A (n ) At any position in the display surface 41a, and in each test area A (r) (r = 1, 2, ...), test the horizontal and vertical directions. Error in horizontal direction (X direction of XY coordinates)

Page 15 469734 V. Explanation of the invention (13) Convergence amounts Crgx, Cgbx, Cbrx are calculated using the camera image of the vertical line included in the test area A (r), and the error convergence in the vertical direction (Y direction of the XY coordinates) The amount Crgy, Cgby 'Cbry is calculated using a camera image of a horizontal line included in the test area A (r). That is, the error convergence amount Crgx, Cgbx 'Cbrx in the horizontal direction is shown in Fig. 4 to calculate the position of the center of gravity center of gravity Jrx, Jgx, Jbx' in the horizontal direction of the vertical line of each color of R, G, and B according to the following Formula. Crgx-| Jrx-Jgx I-(1)

Cgbx =! Jgx-Jbx I (2)

Cbrx = I Jbx-Jrx 1… (3) and ‘Added Word r’ g ′ b represents red, green, and blue, respectively, and x represents the X direction. Moreover, the error convergence amounts Crgy, Cgby, and Cbry in the vertical direction are shown in FIG. 5 'to calculate the position of the center of gravity center of gravity Jry, Jgy' Jby in the vertical direction of the horizontal line of each color of R'G'B, and according to the following Formula.

Crgy = 丨 Jry-Jgy |… ⑷

Cgby Cbry (5) (6)

Jgy-Jby I Jby-Jry | Also, the y-line of the word addition is expressed as the γ direction. In the above formulas (1) to (6), the calculation formulas at the positions of the gravity center of gravity Jqx, Jqy (q < r, g, b) include parameters that can correct errors caused by the position deviation (hereinafter, (Referred to as the number of gates for image parameters of geometric photography) and parameters (so called optical parameters) that can correct errors due to the wavelength characteristics of the imaging lens. Therefore, the position X of the center of gravity of the brightness can be calculated,

< ο 9 7 3 4 V. Description of the invention (14) ~ " —.

The specific data of these parameters of Jqy are recorded as correction data in Zhengzi = Memory 34. In addition, since the geometrical parameters and the optical gravity center of gravity positions JqX, J (iy are shown in Japanese Patent Application Laid-Open No. U-41628, detailed details are omitted here.) In the convergence test, the position of the center of gravity of the brightness Jqx ,, Jqy, is calculated using the image signal captured by the test pattern of the test device 3 (the position of the center of gravity of the brightness Jqx ', Jqy, which is shown in the formulas 0) to (6). Center of gravity

Jqx and Jqy are different and contain errors on the 3 side of the test device. ), Using this and the correction data corresponding to the geometric parameters and optical parameters stored in the correction data storage unit 34, the correction can be calculated according to the equations 0) to (6) due to the test device 3 in the error convergence amount calculation unit 334. The correct error convergence amount Crgx of the measurement error of the geometrical characteristics and optical characteristics of the composition, etc.,

Cgbx, Cbrx ·, Crgy, Cgby, Cbry. The _calibration necessity judgment section 335 judges whether it is necessary to obtain new calibration data corresponding to the color display 4 of the test object. The ^ convergence test device related to this embodiment is the color display 4_ of each test object as described later. The luminous characteristics of the display are different, so calibration data is often not taken. First, use the calibration data that has been obtained for convergence. Test and determine whether the calibration data can be used based on the test results. As long as it is impossible to use any calibration data, you can obtain the calibration data for the color display 4 of the test object. 3 5 is to determine whether it is necessary to obtain new calibration data. Calibration data memory 34 series memory can be corrected due to convergence test device

Page 17 469 734

V. Description of the invention (15) The memory of the school error of the test error (1), as shown in the figure. The memory section 34 is composed of readable 1 > 丨 ~ correction data D, and correction data with recordable complex array. The correction data η. * At least one set is memorized when the device is manufactured today. Because the correction information J) is for the color display of the luminous characteristics of 逋 (the following fluorescent light = display: quasi-color display has slightly the same luminous characteristics of the color 'is the user without using new calibration information to use The calibration data h is tested. Characteristic ΐϊ: Gu has the same light emission as a standard color display, for example. = 2 In the convergence test, the corresponding geometric parameters and optical parameters are read from the calibration data memory 34. A set of correction data, and ^ is calculated from the image of the vertical line or horizontal line taken on the test device 3, the horizontal or vertical brightness center of gravity position Jqx ', Jqy, and the correction data D, by substituting Calculate the correct error convergence amount Crgx, Cgbx 'Cbrx or Crgy, Cgbv, Cbry using the above formulas (0 ~ (6)) to correct the error convergence of the color display with a light emitting characteristic different from the standard color display. In the case of measurement, it is necessary to obtain the calibration data for the color display, but the calibration data is the same as the calibration process described in the conventional technology. By performing the correction process on the color display, calculation is performed, and the calculation result is additionally stored in the correction data storage section 34. The amount 34 is collected and recalled. Use} Pros: Can 'Test 2 Test 1 > After II i with <) ί D and expected to be correct

Page 18 73d 5. In the description of the invention (16), the correction data Dr that is applicable to the indicator stored in the correction data memory section 34 is used, and any corrections stored in the correction data memory section 3-4 cannot be used. As for the data Di, as long as a new correction is obtained ^, the positive data Di + 1 is successively accumulated in the correction data storage section 34. The method of obtaining and using the correction data D1 + | will be described later. The ROM 35 series storage is feasible Convergence test processing (including a series of processing of optical system motion, camera, image data operations, etc.) programs and the data (correction values and data conversion tables, etc.) required for its operation. In addition, it is feasible to provide 36 The data area and working area of the various calculations of the test are described. Because the data input device 37 is used as a convergence test to input various data: two pounds: it is composed of, for example, a keyboard. From the data input device 37, for example, the color display 4 is input. The arrangement interval of the glorious body, the arrangement interval of the pixels of the CCD 213 and 223, and the test points on the display surface of the color display 4. And so on. The test mode and the modal setting of the correction modal that takes out the correction data are also set by the data input device 3? Line 0 is the same with regard to the S-light characteristics-group color display $ 4, although it can be set to correspond to The color display shows the correction data of J4, but the correction mode is used to set the correction data; in the mode, it can be judged whether the existing μ ~ positive data can be used as described above, and the correction can be used. Use the correction data «• 疋" for data. When the correction data cannot be used, get the latest data and set the positive data for testing. ^

4 6 9 73 4 V. Description of the invention (17) The data output device 38 outputs the tested error convergence amount to externally connected devices (printer and external memory device). Moreover, since the display device 39 displays the amount of error convergence tested, the reason is:

CRT, LCD (Liquid Crystal Panel), and PDP (P1 asma Display Panel), etc. The error convergence amount (test result) calculated by the control unit 33 is stored in the RAM 36 'and output to the display device 39 at the same time. A predetermined display format set in advance is displayed. The data is output to the printer and the external memory device through the data output device 38 as needed. Returning to Fig. I ', the color display 4 of the test object is composed of: a color CRT41' as a display image; and a drive control circuit 42 for controlling the driving of the color CRT41. The driving control circuit 42 in the color display 4 inputs the image signal of the test pattern generated by the pattern generator 5, and the driving control circuit 42 drives the bias circuit of the color CRT4i based on the image signal and displays it on the display surface. As shown in FIG. 3, a test pattern showing a mesh shadow is displayed. Next, the processing in the correction mode of the convergence test device 1 will be described with reference to the flowchart shown in FIG. This processing sequence is as shown in Fig. 8. After the calibration test is installed, the calibration mode is activated as soon as the calibration mode is set. In the following, the calibration process will be described based on this flowchart, but only the case where N sets of calibration data have been accumulated in the calibration data storage section 34 will be described here. First, initialize the variables i, min E, and min I (# 1, # 3). 'Variable 1 is a variable that counts the number of known correction data N and is initialized.

Page 20 469734 V. Description of the invention (18) becomes "0". In addition, the variable min £ is a variable that can be used to calculate the judgment data in the judgment of whether the correction is required, and is set to a very large value that cannot be obtained as the judgment data at the initial setting (for example, 〖01D). The correction is based on the known correction data Dj (i = 1, 2, ... N) and the reference value when calculating the error convergence amount Crgx, Cgbx, Cbrx, Crgy, Cgby, and the index i indicating the degree of error is given. Calculate the key; all correct the data Di, and perform judgment to determine whether the minimum value in their indicators is within the allowed range ^. The minimum value Ein is the internal judgment data, and the judgment data is calculated each time the variable minE mi nE 2 is calculated as the index E of the correction data Di. The ratio E is stored in the variable when i is replaced with the finger. To calculate. Also, Timing = Explanation ,, 4 simplifies the symbol, so it is appropriate to

CrSX, Cr / Dream is changed to "P" to "P", and "> Υ" and so on are "CPX" and "Cpy". 1, " .4) 1 The index Ei of the positive data Di is about 1 test point with '(] · = 〇, c plus J to calculate the five errors received Aohong such as, (: coffee, ~ Q4 — execute'), Γχι, Cbryi, as long as the test is performed on 5 test points Q0 Cpxi j, c 丨, because a total of 30 error convergence amount = convergence amount CPXU'CPy " can be calculated to calculate the positive data Di to perform: the index Ei of the data Dl is done In order to evaluate the test error from the benchmark value when using the school index,

In Cpx ", cpyij 'is defined as, for example, the maximum value of 30 error convergence amounts -1 as an index Ei. 469734

Also, in the test system shown in FIG. 8, the error convergence amount Cpxij, Cpyij · of the intersection Qj shown in white is "0", so the reference value is "0", and the known correction data Di is used. The calculated error convergence amount Cpxi j, Cpyi j becomes the absolute value of the error from the reference value. Therefore, the correction data Di is used to calculate the error convergence amounts Cpxi j, cpyij, and the maximum value Cmaxi is calculated to calculate the index Ei for the correction material h. Moreover, in the form of this embodiment, it is used as an index & for the correction data &, although the maximum error convergence amount Cpxij is used ^

Cmaxi, but it is not limited to this. For example, regarding the 30 error convergence amounts Cpxi j and Cpyi j as shown in the following formula (7) and the test points qj at each test point qj shown in the following formula (8), calculate 6 error convergence amounts Cpxi j, Cpyi] 's standard deviation σ · "· = 0,1, ... 4), or the average σ avei (= Σ σ" · / 6) can be used as Ε ;. = [Σ {Crgxi jHCrgy i j2 + CgbxijHCgbyij2 + Cbrxij2 + Cbryij2} / 30]. 5 (j = 〇, 1, ... 4) ... (7) crave ^ ti Σ (Crgxi j2) / 5} 0 · 5 + {KCrgyi j2) / 5} 0 · 5 + {S (Cgbxij2) / 5 } 0-5 + {KCgbyi j2) / 5} 0 · 5 + {Σ (Cbrxi j2) / 5} 0.5 + {E (Cbryij2) / 5}. 5 (j = 〇, i,. "4) ... (8) The variable m i η I can be calculated to correspond to the index Ej stored in m i n E

469734 V. Description of invention (20) Positive data organization variables. Therefore, it is set to "0" in the initial setting. Continuing the 'variable i' is only in "1" step (# 5), the white light emission of the color display device 4 of the measurement target is measured by the test pattern composed of the five intersections made by the lighting correction figure 12 to Use the imaging device 2 to take an image (# 7). After the image signal recorded in the camera 2 is subjected to predetermined image processing such as noise reduction and level adjustment performed by the signal processing circuit 216 '226, it is output to the test device 3, and is output to the A / D converter 31A. After the 31B is converted into the image data of the digital signal, it is temporarily stored in the frame memory 32A, 32B. Continued ’using the i-th correction data D i and testing 6 error convergence amounts Crgxi for each test point Q j in the correction graph 丨 2, crgyi j,

Cgbxij ’Cgbyij’ Cbrxij, Cbryij (a total of 30 error convergence amounts Cpxij ’Cpyij) (# 9). That is, the image data is read out from the frame memories 3U, 31B for each color component, and the brightness center of gravity position calculation unit 333 calculates the positions of the brightness center of gravity of the vertical and horizontal lines Jr X ij for each intersection point Qj. , Jr yij '' j gX ij ,, jgyij ,, j bX ij, '

Jbyi j '° Therefore, in the error convergence amount calculation section 3 34 to use the brightness center of gravity position Jpxi j' 'Jpyi j, (p = r, g, b) and correction data Di by the above (1) ~ (6 ) To calculate the error sensitivity Cpxij, Cpyij. Because i = 1 this time, for the first correction data Di, the error convergence amount Cpxl j, Cpy 1 j (j = 0, 1, ... 4) can be calculated. Continuing, from the calculated error convergence amounts CPX1 j and Cpyl j 褢, the maximum value Cmaxl (#ll) can be calculated, and it is further determined whether the maximum value Cmaxl is smaller than the index value stored in the variable min E (# 13). Min E > Cmaxl

Page 23 469734 V. In the description of the invention (21) (YES in # 13), the content of min E is replaced with the maximum value Cmaxl, and the content of variable i (that is, "1") is set to the variable minl ( # 15). On the one hand, when min E < Cmaxl (NO in # 13), the processing of step # 15 is skipped. Regarding the first correction data Di, since the initial value of the variable mi i η E is min Ε > Cmaxl, the content of the variable min Ε is replaced with Cmaxl 'and the content of the variable min I is changed to "1". Continuing, if it is judged whether the count value of the variable i is consistent with the number N of correction data (# 17), if i < N (NO in # 17), return to step # 5, regarding the next correction data Di + 1. Do the same as above (# 5 ~ # 15) ° This is based on i = 1 'Because it is smaller than N, return to step # 5, and do the same for the second correction data D2' The same treatment. Therefore, 'As long as all the correction data 込 ~ DN — complete the above-mentioned processing (YES in # 17), the content of min E in the correction necessity judgment section 335 is compared with the allowable range of a predetermined error ε ( For example, 〇 仁 m) 'If min Ε 2 ε (YES in # 1 9), the test control unit 331 displays a text message such as "Need to make a correction" on the display device 39 (# 21), and is completed. deal with. On the one hand, if min £ < ε (NO in # 19), the test control unit 331 displays the message 'for example,' such as Γ〇κ 'on the display device 39 (# 23)' and stores it in a variable. The correction data of the number i is set as the correction data for the convergence test of the color display 4 in the arithmetic control unit 332 (# 25), and the processing is completed. If the user needs to make the piano according to the display content of the display device 39, he can continue to use the above-mentioned conventional knowledge in the test system for current calibration.

Page 24 469734 V. Description of the invention (22) The technology is the same method to calculate the correction data. Therefore, as long as the calibration data is calculated, the calibration data is recorded as (N + 1) calibration data D, and is recorded in the calibration data storage unit 34, and used as a calibration for the convergence test of the color display 4 of the test object. The data is set in the arithmetic control unit 332. And if the correction is not required according to the display content of the display device 39, the user can perform the convergence test of the color display 4 by switching to the test mode by the mode of the Jiang test device without performing the correction process. FIG. 7 is a flowchart showing a second embodiment of the correction modal processing. The flowchart shown in the figure is in the flowchart shown in FIG. 6, because step # 7 is moved before step # 1 ', so step # 0 corresponds to step # 7. That is, the processing of the correction mode in the second embodiment is to take a test pattern and start taking in image data before starting the calculation processing. As mentioned in the first paragraph, the overall coverage of the method is related to the correction mode in the second embodiment. The processing of the correction mode in the second embodiment is only relevant—the processing order of the correction mode in the implementation mode is not the same because of the arithmetic processing. Therefore, detailed description is omitted here. In addition, in the above-mentioned correction processing, the field of view S of the helmet f imaging device 2 having a smaller size in FIG. 12 is corrected to adjust the color display 4, the diffuser U, and the correction chart 12 in the #image range. And by performing the judgment of whether to correct or not in bit two, the correct judgment can also be considered. The color test is as described above. In the correction mode, the correction pattern of the color display 4 and the error in its test result ( That is, a convergence test is performed using known correction data that causes the test object to be displayed according to the known correction data used

469 73 4 V. The error of the description of the invention (23)) is the correction data used for the convergence test of the color display 4 of the test object when the calibration data is within the predetermined allowable range ε, because the color display 4 can be omitted The acquisition of calibration data can significantly reduce the burden of the calibration process compared to the conventional technique of performing calibration when the light emitting characteristics of the color display 4 of the test object are different each time. In addition, since the light emission characteristics are all different, since W does not need to obtain calibration data and is stored in the calibration data storage unit 34, the memory capacity of the calibration data storage unit 34 can be reduced. In addition, although in the above embodiment, although Explain about the convergence test, but even for the amount of geometric distortion of the display characteristic test device (such as the distance between the crossing points Qj or the parallelogram between the crossing points Qj, and the distance / ghost distortion amount or the true distortion amount Equal correction; = Reduce the correction process by using known correction data. In this case, 'the three-dimensional coordinate tester and other tests are used to test and correct the position of the intersection of Figure 12 and the point Qj, and then set the reference for the above-mentioned geometric distortion amount. In the process of deciding whether to perform correction before correction, the above-mentioned geometric distortion amount is calculated by using the image signal obtained by imaging the correction map with the imaging device 2 and comparing the calculation result with a preset reference value to Determine whether to correct. [Effects of the invention] ^ As explained above, if according to the present invention, use the The image CRT or the m is slightly the same and the light is extremely steep. The CRT is used to record the calibration test pattern formed by illuminating a predetermined calibration chart to form the image signal of the image and the calibration stored in the calibration data storage device. f data to calculate the display characteristics' and based on its operation

4 69 73 4 V. Description of the invention (24) The calculation results to determine the correction data for the correction are not suitable for having and corresponding to the known ones, often without correction, and any correction data accumulated by the correction department. You can also use the capacity of the accumulated correction funds. Whether the material is suitable for the CRT = of the test object, because the correction process can be instructed, the CRT of the positive data is a CRT with different luminous characteristics, which can reduce the time and labor of the correction process. If you add new calibration data, you cannot use the new calibration data for the appropriateness of the judged calibration data, so in addition to being effective, you can also reduce the memory of the calibration data and use the accumulated Calibration data can be applied to test preparation for testing that does not require calibration. … When any of the calibration data is used, it is possible to test the CRT display characteristics of the image, so it is possible to quickly perform the display characteristics 469 73 4 Simple description of the model's figure 'Figure 1 is a schematic configuration diagram of the CRT display characteristic test device of the present invention . Fig. 2 is a functional block diagram showing the operation functions of the control section. FIG. 3 is a diagram showing a mesh shading pattern of a color display. Fig. 4 is a diagram for separating the vertical lines included in the test field into lines of R, g, and B color components. Fig. 5 is a diagram for separating the horizontal lines included in the test field into lines of each color component of R'G, B. Fig. 6 is a flowchart showing a first embodiment of the correction modal processing. FIG. 7 is a flowchart showing a second embodiment of the correction modal processing. Fig. 8 is a perspective view showing the structure of a test system for correction processing in a CRT display characteristic test device. Figure 9 is a front view of the correction chart. [Symbol description] 1 ~ convergence test device; 2 ~ camera device; 21,22 ~ camera camera; 211,22 camera lens; 212,222 ~ tri-color resolution 稜鏡; 213R, 213G '213B ~ solid-state imaging element; 223R , 22 3G, 2 23B ~ solid-state imaging element; 2 1 4 '2 2 4 ~ camera control circuit; 21 5, 2 2 5 ~ focus control circuit; 216, 226 ~ signal processing circuit;

Page 28 4 6 9 73 4 Schematic description of 3 to test device; 31A, 31B to A / D converter: 32A, 32B to frame memory; 3 3 to control section; 3 31 to test control section (calibration (Indicating device, calibration data recording device, calibration data setting device); 332 ~ operation control unit (operation device); 333 ~ brightness center position calculation unit; 334 ~ error convergence amount calculation unit; 335 ~ correction judgment unit; 34 ~ Calibration data memory (determining Pei Zhi); 35-ROM; 36 ~ RAM; 37 ~ data input device; 38 ~ data output device; 39 ~ display device; 4 ~ color display; 4bu color CRT; 42 ~ drive control circuit ; 5 ~ pattern generator.

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Claims (1)

469734 VI. The scope of patent application is positive and 1 virtual: a display test device with a correction data storage device that can read and write the correction data and read the predetermined test pattern displayed on the CRT of the test object using camera = memory Based on the calibration data of the calibration data storage device, the calculation: LK i display characteristics, which are characterized by:, computing device, before the regular calibration process, use the CRT with the test object or the CRT is slightly the same The luminous characteristics are shown in the image. The image signal obtained from the calibration test pattern formed by the predetermined calibration chart and the calibration operation display characteristics stored in the calibration data storage device; the judgment device is based on the calculation results of the computing device. To determine whether the correction data used for the calculation of the display characteristics are appropriate; and the correction instructing device, as long as it is judged that the correction data in the determination device is unsuitable, instruct the correction processing. 2_ The CRT display characteristic test device ′ described in item 1 of the scope of patent application further includes a display device, and the above-mentioned correction instruction device instructs the correction processing by promoting the display of the correction processing of the display device. 3. The crt display characteristic test device according to item 1 of the scope of patent application, which further includes a calibration data recording device, as long as the new calibration of the above-mentioned test target CRT is calculated according to the calibration process according to the instruction of the calibration instruction device. “Data” will additionally record the calibration data in the calibration data storage device, and the calibration instruction device means that as long as it judges that all the calibration data stored in the calibration data storage device is inappropriate, it means that Page 30 4 69 734 VI. Scope of patent application The correction process is shown. 4. The CRT display characteristic test device as described in item 1 of the scope of the patent application, wherein the above-mentioned determination device calculates whether the test value of the display characteristic calculated by the calculation device is within the allowable range of the preset error. When the test value is outside the allowable range, it is judged that the correction data used in the calculation of the above characteristics is inappropriate. * No 5. If the CRT display characteristic test described in item 1 of the scope of the patent application is included, it also includes a calibration data setting device. As long as the above judgment is made to determine that the calibration data is appropriate, the above test will be tested on the CRT. When displaying the display characteristics, it is judged that the appropriate correction data is set as the correction data for the characteristic. Β '' No 6. The CRT display characteristic test described in item 丨 of the scope of patent application =, where the above display characteristics are Regarding the convergence characteristics of the above-mentioned CRT, the calibration method of the τ display characteristic test device is such that the image signal obtained from the predetermined test pattern of the CRT of the test object should be stored in the CRT stored in the calibration data storage device The display characteristics of CRT are as follows: f. Before the luminous characteristics of the material samples corresponding to the calibration data described above are different from the calibration data, use the CRT with the luminous characteristics to obtain the luminous characteristics. Established image of camera lighting = image signals obtained from the same test pattern Memory device 469734 Calculate the correction data that has been recalled, and judge the correction used in the calculation of its display characteristics. "Come:] if the correction data is not suitable, then instruct the CRT's correction data. The CRT display characteristics test described in item 7 above, calibration method, in which, according to the CRT calibration data acquisition instructions,]: By installing the board to be processed, as long as a new calibration data about the CRT of the test object is calculated, The correction data is additionally recorded in the correction data storage device, and in the subsequent judgment of the suitability of the correction data, as long as it is judged that all the correction data stored in the correction data storage device is unsuitable, the correction processing is instructed. The method for calibrating a CRT display characteristic test device described in item 7 of the scope of the patent application, wherein, as long as it is judged that the correction data is appropriate, the correction data when it is judged that the display characteristic is suitable for the CRT is used as the display characteristic test Set the calibration data to be used. 10. The calibration method of the CRT display characteristic test device described in item 7, 8 or 9 of the scope of patent application, , The display characteristics based on the convergence characteristic of the CRT described above. Page 32