CN106412575A - Method and device for detecting display - Google Patents
Method and device for detecting display Download PDFInfo
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- CN106412575A CN106412575A CN201610821285.4A CN201610821285A CN106412575A CN 106412575 A CN106412575 A CN 106412575A CN 201610821285 A CN201610821285 A CN 201610821285A CN 106412575 A CN106412575 A CN 106412575A
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- Prior art keywords
- display
- grid
- checkerboard image
- defect
- judging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
Abstract
The invention discloses a method and a device for detecting a display. The method is characterized by comprising the steps of controlling an image signal generator to generate a chessboard image, and controlling the image signal generator to send the chessboard image to the to-be-detected display, so that the display displays the received chessboard image; controlling a camera to shoot the chessboard image displayed on the display, and obtaining the chessboard image shot by the camera; judging whether the number of angular points of the obtained chessboard image is H, H=(N+1)*(M+1); if yes, judging the display does not exist an apparent display defect; and if no, judging the display exists the apparent display defect; and correspondingly, the invention further discloses a device for detecting the display. By adopting the method and the device disclosed by the embodiment of the invention, as an automation standard is adopted for detecting, the accuracy is high, and whether the display exists the display defect can be detected out accurately.
Description
Technical field
The present invention relates to electronic technology field, more particularly, to a kind of method and device of detection display.
Background technology
Usually, television set producing line has after group installs television set whether the display that individual test station is test TV has
Abnormal, detection content includes picture brightness, color saturation etc., also includes display screen picture and whether there is display extremely, such as bright
Point, dim spot, bright line, concealed wire, crackle, negative and positive screen, local offset etc. are abnormal.The way of most of television factories is at present：When
Streamline machine of coming on TV circulates after this test station, workman with connect in advance picture signal generator HDMI wire (or
Person's VGA line) other end be connected to television set, be then switched to corresponding passage with remote control, such as HDMI passage or VGA lead to
Road, television set display image signals generator input image, workman subsequently detect by an unaided eye television set display picture
Whether brightness, color saturation etc. normal, and judge display whether have bright spot, dim spot, bright line, concealed wire, crackle, negative and positive screen,
Local offset etc. is abnormal, and then workman is marked to this television set with the presence or absence of abnormal and specific abnormal conditions again.
There is following defect in the scheme of above-mentioned detection：By whether adopting the display picture brightness manually judging television set
Normally and the screen mode that whether has bright spot, dim spot, bright line, concealed wire, crackle, negative and positive screen, local offset etc. abnormal easily goes out
Now judge by accident, and for needing for the application scenarios that substantial amounts of display is detected, the detection efficiency of such scheme is low
Under.
Content of the invention
The embodiment of the present invention proposes a kind of method and device of detection display, is detected using automatization's standard, essence
Exactness is high, can detect that display whether there is display defect exactly.
In a first aspect, the embodiment of the present invention proposes a kind of method of detection display, including：
Control picture signal generator to generate checkerboard image, and control described image signal generator by described checkerboard image
It is sent to display to be detected, so that the described checkerboard image receiving is shown by described display；Wherein, described chess
Disk image includes N × M grid, and described checkerboard image includes at least two different grid colors, and in the horizontal or vertical
On the color of arbitrary neighborhood grid differ；
Control the checkerboard image that camera shooting shows on the display, and obtain the chessboard figure that described camera photographs
Picture；
Whether the angle point quantity of the checkerboard image accessed by judging is H, H=(N+1) × (M+1)；
If so, judge that described display does not have obvious display defect；
If it is not, judging that described display has obvious display defect.
In conjunction with a first aspect, in the first possible implementation of first aspect, receiving in described display
In checkerboard image, the color phase apart from all grid of identical of the central point of the checkerboard image receiving apart from described display
With then the method for described detection display also includes：
When judging that described display does not have obvious display defect, by apart from accessed checkerboard image
Central point apart from identical grid as same group of grid, and calculate the dispersion degree of the color of each group of grid；
Judge whether that the dispersion degree of the color of one group of grid is more than discrete threshold values；
If so, then judge that described display has negative and positive screen defect；
If it is not, then judging that described display does not have negative and positive screen defect.
In conjunction with a first aspect, in the possible implementation of the second of first aspect, the method for described detection display
Also include：
When judging that described display does not have obvious display defect, in accessed checkerboard image
Each grid, calculates the ratio shared by the corresponding frequency range of each color in this grid, and by each color in this grid
Ratio shared by corresponding frequency range is ranked up from big to small；
Judge that whether there is the ratio shared by frequency range having sequence second in the grid of described checkerboard image is more than ratio
Threshold value；
If so, then judge that described display has the defect of bright concealed wire or crackle；
If it is not, then judging that described display does not have the defect of bright concealed wire or crackle.
In conjunction with a first aspect, in the third possible implementation of first aspect, the method for described detection display
Also include：
The display brightness value of each grid is obtained from accessed checkerboard image；
For each grid, calculate the display brightness value of this grid and normal brightness value corresponding with this grid it
Between luminance difference；
Calculate the quadratic sum of the luminance difference of all grid, obtain the luminance deviation degree of described checkerboard image；
Judge whether described luminance deviation degree is more than luminance deviation threshold value；
If so, then judge that the brightness of described display is partially dark or partially bright, or judge described display exist local speck or
Skin dark stain；
If it is not, then judge described display brightness normal.
In conjunction with a first aspect, in the 4th kind of possible implementation of first aspect, the method for described detection display
Also include：
When judging that described display has obvious display defect, calculate every in accessed checkerboard image
The coordinate of one angle point；
According to the coordinate of each angle point, select the angle of the grid being not belonging in described checkerboard image from described angle point
The angle point of coordinate；
The angle point of selection is fallen grid region as there is obvious display defect in described display
Region.
Correspond in a first aspect, the embodiment of the present invention proposes a kind of device of detection display in second aspect, including：
Control display module, for controlling picture signal generator to generate checkerboard image, and control described image signal to send out
Described checkerboard image is sent to display to be detected, so that the described checkerboard image receiving is entered by described display by raw device
Row display；Wherein, described checkerboard image includes N × M grid, and described checkerboard image includes at least two different grid colors,
And the color of the arbitrary neighborhood grid in the horizontal or on vertical differs；
Control taking module, for the checkerboard image controlling camera shooting to show on the display, and obtain described
The checkerboard image that camera photographs；
Angle point judge module, whether the angle point quantity for judging accessed checkerboard image is H, H=(N+1) × (M
+1)；
First determination module, for when the angle point quantity of accessed checkerboard image is for H, judging described display
There is not obvious display defect；
Second determination module, for when the angle point quantity of accessed checkerboard image is not H, judging described display
There is obvious display defect.
In conjunction with second aspect, in the first possible implementation of second aspect, receive in described display
In checkerboard image, the color phase apart from all grid of identical of the central point of the checkerboard image receiving apart from described display
With then the device of described detection display also includes：
Dispersion degree computing module, for when judging that described display does not have obvious display defect, will be away from
With a distance from the central point of accessed checkerboard image, identical grid is as same group of grid, and calculates each group of grid
The dispersion degree of color；
Dispersion degree judge module, the dispersion degree for judging whether the color of one group of grid is more than discrete threshold
Value；
3rd determination module, for when there are the dispersion degree of color of one group of grid more than discrete threshold values, judging
There is negative and positive screen defect in described display；
4th determination module, for when not there are the dispersion degree of color of one group of grid more than discrete threshold values, sentencing
There is not negative and positive screen defect in fixed described display.
In conjunction with second aspect, in the possible implementation of the second of second aspect, the device of described detection display
Also include：
Color-ratio computing module, for judge described display there is not obvious display defect when, for
Each of accessed checkerboard image grid, calculates the ratio shared by the corresponding frequency range of each color in this grid,
And the ratio shared by the corresponding frequency range of each color in this grid is ranked up from big to small；
Color-ratio judge module, has the frequency of sequence second for judging to whether there is in the grid of described checkerboard image
The ratio of Duan Suozhan is more than proportion threshold value；
5th determination module, for when there are in the grid of described checkerboard image sequence second frequency range shared by ratio
During more than proportion threshold value, judge that described display has the defect of bright concealed wire or crackle；
6th determination module, for when not there are in the grid of described checkerboard image sequence second frequency range shared by ratio
When example is more than proportion threshold value, judge that described display does not have the defect of bright concealed wire or crackle.
In conjunction with second aspect, in the third possible implementation of second aspect, the device of described detection display
Also include：
Display brightness acquisition module, for obtaining the display brightness of each grid from accessed checkerboard image
Value；
Luminance difference computing module, for for each grid, calculate this grid display brightness value and with this grid
Corresponding normal brightness value luminance difference between the two；
Luminance deviation computing module, for calculating the quadratic sum of the luminance difference of all grid, obtains described checkerboard image
Luminance deviation degree；
Luminance deviation judge module, for judging whether described luminance deviation degree is more than luminance deviation threshold value；
7th determination module, for when described luminance deviation degree is more than luminance deviation threshold value, judging described display
Brightness partially dark or partially bright, or judge described display there is local speck or skin dark stain；
8th determination module, for when described luminance deviation degree is not more than luminance deviation threshold value, judging described display
The brightness of device is normal.
In conjunction with second aspect, in the 4th kind of possible implementation of second aspect, the device of described detection display
Also include：
Angular coordinate computing module, for when judging that described display has obvious display defect, calculating institute
The coordinate of each of checkerboard image getting angle point；
Angle point chooses module, for the coordinate according to each angle point, selects and be not belonging to described chess from described angle point
The angle point of the angular coordinate of the grid in disk image；
Defect area determining module, for the angle point of selection is fallen grid region deposit as in described display
Region in obvious display defect.
Implement the embodiment of the present invention, have the advantages that：
The method of detection display provided in an embodiment of the present invention, generates checkerboard image by controlling picture signal generator
And it is sent to display to be detected, so that the described checkerboard image receiving is shown by described display, and adopt phase
Machine shoots to the image that display shows；Because described checkerboard image includes N × M grid, described checkerboard image includes
At least two different grid colors, and the color of the arbitrary neighborhood grid in the horizontal or on vertical differs, can be accurate
Really determine position and the quantity of grid angle point, and then can be by judging the angle point quantity of checkerboard image that gets from camera whether
To judge that described display whether there is obvious display defect for grid angle quantity, accuracy is high.In addition, this method can
Directly by computing device, detect that the process of display has unified examination criteria, objectivity is by force it is adaptable to show to substantial amounts of
Show the application scenarios that device is detected.And, the device of detection display provided in an embodiment of the present invention is had with said method
Identical technical characteristic, thus the technique effect with said method that this device reaches is consistent.
Brief description
Fig. 1 is the structural representation of the embodiment of system of detection display that the present invention provides；
Fig. 2 is the schematic flow sheet of the embodiment of method of detection display that the present invention provides；
Fig. 3 is the enforcement that in the method for detection display that the present invention provides, detection display whether there is negative and positive screen
The schematic flow sheet of example；
Fig. 4 is that the image of the embodiment of checkerboard image in the method for detection display that the present invention provides is illustrated
Figure；
Fig. 5 is that in the method for detection display that the present invention provides, detection display whether there is lacking of bright concealed wire or crackle
The schematic flow sheet of a sunken embodiment；
Fig. 6 is the flow process of the embodiment of brightness detecting display in the method for detection display that the present invention provides
Schematic diagram；
Fig. 7 is the structural representation of the embodiment of device of detection display that the present invention provides.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Because the method detecting display that the present invention provides needs display to carry out luminescence display, then when in shooting
During the image that display shows, external light source can affect the image captured by camera, therefore the process of detection display all exists below
Detect in dark place, processor 01, picture signal generator 02 and camera 04 are all placed in dark place, as shown in figure 1, Fig. 1 is this
Structural representation, processor 01 and the picture signal generator 02 of the embodiment of system of detection display that invention provides
Connect, the image signal line (HDMI wire or VGA line) of picture signal generator 02 is connected to the port (HDMI of tested display 03
Port or VGA port)；Then, after processor 01 receives detection request signal, following detection will be executed：
Referring to Fig. 2, it is the schematic flow sheet of the embodiment of method of detection display that the present invention provides, the method
Executed by processor 01, including step S1 to S3, specially：
S1, processor 01 controls picture signal generator 02 to generate checkerboard image, and controls described image signal generator
Described checkerboard image is sent to display 03 to be detected by 02, so that described display 03 is by the described checkerboard image receiving
Shown；Wherein, described checkerboard image includes N × M grid, and described checkerboard image includes at least two different grid face
Color, and the color of the arbitrary neighborhood grid in the horizontal or on vertical differs；
S2, processor 01 controls camera 04 to shoot the checkerboard image of display on described display 03, and obtains described phase
The checkerboard image that machine 04 photographs；
S3, processor 01 judges whether the angle point quantity of accessed checkerboard image is H, H=(N+1) × (M+1)；If
It is to judge that described display 03 does not have obvious display defect；If it is not, judging that described display 03 exists obviously
Display defect.
It should be noted that whole display picture one can be divided into multiple regions, chessboard by display display checkerboard image
Image is due to including at least two different grid colors, and the color of the arbitrary neighborhood grid in the horizontal or on vertical is not
Identical, then the angle point on checkerboard image on the other hand can be calculated by existing angle point algorithm, and due to chessboard figure
Seem prefabricated by picture signal generator 02 in advance, then on the premise of display 03 does not have display defect, shown
The angle point quantity of checkerboard image be to determine, if the angle point quantity detecting is different from the angle point quantity of former checkerboard image,
Illustrate that display 03 has obvious relatively large-area display defect, and now process controllable alarm module, for example
Alarm lamp 05 is reported to the police.
In addition, the detection process of above-mentioned steps S1 to S3 can detect that display 03 whether there is obviously exactly
Defect, and for excessively tiny defect by the method that above-mentioned angle point judges be cannot detect in addition it is also necessary to carry out after
Continuous local accurately checks, can check non-obvious defect, for example little bright line, concealed wire, little crackle, little bright
The defects such as speckle, skin dark stain.Thus when judge display 03 there is not obvious display defect it is likely that exist non-aobvious and
During the display defect seen, the situation that following detection display 03 whether there is negative and positive screen can be executed：
Due to display 03 be usually LED LCD CRT construction, thus display 03 display when using backlight photograph
Bright mode, thus judging the problem of display 03 whether negative and positive screen, carry out on the basis of needing the central point to show or axis
The color distortion of the comparison grid of symmetrical expression.So when display 03 is shown, received based on above-mentioned control display 03
To the picture that will show be the checkerboard image of above-mentioned requirements in addition it is also necessary to the checkerboard image that receives in described display 03
In, show described in command range that the color apart from all grid of identical of the central point of the checkerboard image receiving is identical
, then specific detection process can be found in Fig. 3, and Fig. 3 is that in the method for detection display that the present invention provides, detection display is
The schematic flow sheet of the no embodiment that there is negative and positive screen, including step S4 and S5, specially：
S4, processor 01 (judges described aobvious when judging that described display 03 does not have obvious display defect
Show that device 03 there may exist display defect that is non-aobvious and seeing), by the distance phase of the central point apart from accessed checkerboard image
Same grid is as same group of grid, and calculates the dispersion degree of the color of each group of grid；
It should be noted that as shown in figure 4, Fig. 4 is the checkerboard image in the method for detection display of present invention offer
An embodiment image schematic diagram, the checkerboard image in Fig. 4 includes 5 × 5 grid, with horizontal coded system for chessboard figure
As being numbered, and by above-mentioned " apart from accessed checkerboard image central point apart from identical grid as same group
The requirement of grid " is grouped, then the grid of numbering 1,5,21 and 25 is same group of grid, numbering 2,4,6,10,16,20,22
It is same group of grid with 25 grid, so can carry out analogizing being classified.
Below by taking one group of grid of numbering 1,5,21 and 25 as a example, description calculates the discrete journey of the color of this group grid
Degree, can be described in the way of variance or standard deviation：If the color of numbering 1,5,21 and 25 grid be divided into R1.G1.B1,
R5.G5.B5, R21.G21.B21 and R25.G25.B25, then the color of this group grid of the dispersion degree of the color of this group grid
Variance D (1,5,21,25) or standard deviation
S5, processor 01 judges whether that the dispersion degree of the color of one group of grid is more than discrete threshold values；If so, then
Processor 01 judges that described display 03 has negative and positive screen defect；If it is not, then processor 01 judges that described display 03 does not exist
Negative and positive screen defect.
The color of same group of grid in the checkerboard image that will be shown being received due to described display 03 is
Identical, then shoot same group of chess in the checkerboard image obtaining for after display 03 display image and using camera 04
Lattice it is only necessary to comparison mutual color performance difference, you can judge display 03 whether there is negative and positive screen phenomenon.Because
If the dispersion degree value of the color of same group of grid in shooting the image obtaining is excessive, illustrate that this group grid has color
The excessive grid of difference, because display 03 shows that this this grid is to be shown based on same color, then the difference mistake showing
Greatly, then prove that display 03 has the phenomenon of negative and positive screen.
On the other hand, when judging that display 03 does not have obvious defect, can also continue to execute following inspection
Survey display 03 and whether there is bright concealed wire or the defect compared with crackle, as shown in figure 5, Fig. 5 is the detection that the present invention provides showing
In the method for device 03, detection display 03 whether there is the schematic flow sheet of an embodiment of defect of bright concealed wire or crackle, tool
Body is：
S6, processor 01 (judges described aobvious when judging that described display 03 does not have obvious display defect
Show that device 03 there may exist display defect that is non-aobvious and seeing), for each of accessed checkerboard image grid, calculate
Ratio shared by the corresponding frequency range of each color in this grid, and by shared by the corresponding frequency range of each color in this grid
Ratio is ranked up from big to small；
S7, processor 01 judges to whether there is in the grid of described checkerboard image the ratio shared by frequency range of sequence second
Example is more than proportion threshold value；If so, then processor 01 judges that described display 03 has the defect of bright concealed wire or crackle；If it is not, then
Processor 01 judges that described display 03 does not have the defect of bright concealed wire or crackle.
It should be noted that when getting checkerboard image, each grid in this image can be divided as color histogram
Analysis, in color histogram in figure, such as this grid should be the color lump of black, but produces the bright line of green in the color lump of black,
Then the green frequency range in this color histogram in figure has projection, then can determine that this grid has the defect of bright concealed wire or crackle.False
If the unified image showing same color of the picture of whole display 03, rather than above-mentioned grid, then detect in this picture
Ratio shared by each of shown color corresponding frequency band is it is more likely that the ratio shared by frequency range of sequence second is simultaneously little
(projection is inconspicuous) it is more likely that being judged as normal phenomenon, but due to this projection be limited to a certain in this checkerboard image
In individual grid, e.g. 5 × 5 checkerboard image, for same ratio threshold value, degree of accuracy improves 25 times, therefore the present invention
Embodiment carries out detecting the defect degree of accuracy height of bright concealed wire or crackle using checkerboard image.
While detecting that display 03 whether there is obvious defect, also can detect the brightness (bag of display 03
Include entirety or the brightness of local) display whether normally, as shown in fig. 6, in the method for detection display that Fig. 6 is the present invention to be provided
The schematic flow sheet of one embodiment of brightness of detection display, including step S8 to S11, specially：
S8, processor 01 obtains the display brightness value of each grid from accessed checkerboard image；
S9, processor 01, for each grid, calculates the display brightness value of this grid and standard corresponding with this grid
Brightness value luminance difference between the two；
S10, processor 01 calculates the quadratic sum of the luminance difference of all grid, obtains the luminance deviation of described checkerboard image
Degree；
S11, processor 01 judges whether described luminance deviation degree is more than luminance deviation threshold value；If so, then judge described
The brightness of display 03 is partially dark or partially bright, or judges that described display has local speck or skin dark stain；If it is not, then judging described aobvious
Show that the brightness of device 03 is normal.
It should be noted that before aforementioned display device 03 is detected, taking one to show that normal display is carried out
Sample collection, that is, control this normal displays to show above-mentioned checkerboard image, and control camera 04 to shoot the checkerboard image of display, from
The normal brightness value as this grid for the display brightness value of each grid is obtained in the checkerboard image that camera 04 collects.For one
Being defined as of the display brightness value of individual grid：The color of this grid be color range respectively shared in red-green-blue (0～
255) quantity, is display brightness value after the color range of three primary colours is added and divided by the 3 color range values being obtained.
When display 03 is gone out by above-mentioned Corner Detection there is obvious display defect, can also further determine that
The concrete region of this display defect, the method for determination is specific as follows：
Processor 01, when judging that described display 03 has obvious display defect, calculates accessed chessboard
The coordinate of each of image angle point；
Processor 01, according to the coordinate of each angle point, selects from described angle point and is not belonging in described checkerboard image
The angle point of the angular coordinate of grid；
Processor 01 angle point of selection is fallen grid region apparent as existing in described display 03
Display defect region.
In addition, differentiation result is shown in one after drawing any of the above-described differentiation result by processor 01 being placed on outside dark place
In result display, and, when detecting exception, processor 01 can also control the alarm module being placed on outside dark place, for example
Alarm lamp 05, carries out alert process.
The method of detection display provided in an embodiment of the present invention, generates checkerboard image by controlling picture signal generator
And it is sent to display to be detected, so that the described checkerboard image receiving is shown by described display, and adopt phase
Machine shoots to the image that display shows；Because described checkerboard image includes N × M grid, described checkerboard image includes
At least two different grid colors, and the color of the arbitrary neighborhood grid in the horizontal or on vertical differs, can be accurate
Really determine position and the quantity of grid angle point, and then can be by judging the angle point quantity of checkerboard image that gets from camera whether
To judge that described display whether there is obvious display defect for grid angle quantity, accuracy is high.In addition, this method can
Directly by computing device, detect that the process of display has unified examination criteria, objectivity is by force it is adaptable to show to substantial amounts of
Show the application scenarios that device is detected.
Referring to Fig. 7, it is the structural representation of the embodiment of device of detection display that the present invention provides, this device
For floppy disk system, it is arranged in above-mentioned processor, whole flow processs of the method for detection display of above-mentioned offer, this device can be provided
Specifically include：
Control display module 11, for controlling picture signal generator to generate checkerboard image, and control described image signal
Described checkerboard image is sent to display to be detected by generator, so that described display is by the described checkerboard image receiving
Shown；Wherein, described checkerboard image includes N × M grid, and described checkerboard image includes at least two different grid face
Color, and the color of the arbitrary neighborhood grid in the horizontal or on vertical differs；
Control taking module 12, for the checkerboard image controlling camera shooting to show on the display, and obtain institute
State the checkerboard image that camera photographs；
Angle point judge module 13, whether the angle point quantity for judging accessed checkerboard image is H, H=(N+1) ×
(M+1)；
First determination module 14, for when the angle point quantity of accessed checkerboard image is for H, judging described display
There is not obvious display defect in device；
Second determination module 15, for when the angle point quantity of accessed checkerboard image is not H, judging described display
There is obvious display defect in device.
In conjunction with second aspect, in the first possible implementation of second aspect, receive in described display
In checkerboard image, the color phase apart from all grid of identical of the central point of the checkerboard image receiving apart from described display
With then the device of described detection display also includes：
Dispersion degree computing module 16, for when judging that described display does not have obvious display defect, inciting somebody to action
Apart from accessed checkerboard image central point apart from identical grid as same group of grid, and calculate each group of grid
Color dispersion degree；
Dispersion degree judge module 17, the dispersion degree for judging whether the color of one group of grid is more than discrete
Threshold value；
3rd determination module 18, for when there are the dispersion degree of color of one group of grid more than discrete threshold values, sentencing
There is negative and positive screen defect in fixed described display；
4th determination module 19, for when not there are the dispersion degree of color of one group of grid be more than discrete threshold values when,
Judge that described display does not have negative and positive screen defect.
In conjunction with second aspect, in the possible implementation of the second of second aspect, the device of described detection display
Also include：
Color-ratio computing module 20, for when judging that described display does not have obvious display defect, right
In each of accessed checkerboard image grid, calculate the ratio shared by the corresponding frequency range of each color in this grid
Example, and the ratio shared by the corresponding frequency range of each color in this grid is ranked up from big to small；
Color-ratio judge module 21, has sequence second for judging to whether there is in the grid of described checkerboard image
Ratio shared by frequency range is more than proportion threshold value；
5th determination module 22, for when there are in the grid of described checkerboard image sequence second frequency range shared by ratio
When example is more than proportion threshold value, judge that described display has the defect of bright concealed wire or crackle；
6th determination module 23, for when not there are in the grid of described checkerboard image sequence second frequency range shared by
When ratio is more than proportion threshold value, judge that described display does not have the defect of bright concealed wire or crackle.
In conjunction with second aspect, in the third possible implementation of second aspect, the device of described detection display
Also include：
Display brightness acquisition module 24, for obtaining the display brightness of each grid from accessed checkerboard image
Value；
Luminance difference computing module 25, for for each grid, calculate this grid display brightness value and with this chess
Lattice corresponding normal brightness value luminance difference between the two；
Luminance deviation computing module 26, for calculating the quadratic sum of the luminance difference of all grid, obtains described chessboard figure
The luminance deviation degree of picture；
Luminance deviation judge module 27, for judging whether described luminance deviation degree is more than luminance deviation threshold value；
7th determination module 28, for when described luminance deviation degree is more than luminance deviation threshold value, judging described display
The brightness of device is partially dark or partially bright, or judges that described display has local speck or skin dark stain；
8th determination module 29, described aobvious for when described luminance deviation degree is not more than luminance deviation threshold value, judging
Show that the brightness of device is normal.
In conjunction with second aspect, in the 4th kind of possible implementation of second aspect, the device of described detection display
Also include：
Angular coordinate computing module 30, for when judging that described display has obvious display defect, calculating
The coordinate of each of accessed checkerboard image angle point；
Angle point chooses module 31, for the coordinate according to each angle point, selects described in being not belonging to from described angle point
The angle point of the angular coordinate of the grid in checkerboard image；
Defect area determining module 32, for the angle point of selection is fallen grid region as in described display
There is the region of obvious display defect.
The device of detection display provided in an embodiment of the present invention, generates checkerboard image by controlling picture signal generator
And it is sent to display to be detected, so that the described checkerboard image receiving is shown by described display, and adopt phase
Machine shoots to the image that display shows；Because described checkerboard image includes N × M grid, described checkerboard image includes
At least two different grid colors, and the color of the arbitrary neighborhood grid in the horizontal or on vertical differs, can be accurate
Really determine position and the quantity of grid angle point, and then can be by judging the angle point quantity of checkerboard image that gets from camera whether
To judge that described display whether there is obvious display defect for grid angle quantity, accuracy is high.In addition, in this device
Be placed in processor, to the process of display detection, there is unified examination criteria, objectivity strong it is adaptable to substantial amounts of display
The application scenarios being detected.
One of ordinary skill in the art will appreciate that realizing all or part of flow process in above-described embodiment method, it is permissible
Instruct related hardware to complete by computer program, described program can be stored in a computer read/write memory medium
In, this program is upon execution, it may include as the flow process of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The above is the preferred embodiment of the present invention it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of method of detection display is it is characterised in that include：
Control picture signal generator to generate checkerboard image, and control described image signal generator to send described checkerboard image
To display to be detected, so that the described checkerboard image receiving is shown by described display；Wherein, described chessboard figure
As including N × M grid, described checkerboard image includes at least two different grid colors, and in the horizontal or on vertical
The color of arbitrary neighborhood grid differs；
Control the checkerboard image that camera shooting shows on the display, and obtain the checkerboard image that described camera photographs；
Whether the angle point quantity of the checkerboard image accessed by judging is H, H=(N+1) × (M+1)；
If so, judge that described display does not have obvious display defect；
If it is not, judging that described display has obvious display defect.
2. the method for detection display as claimed in claim 1 is it is characterised in that the chessboard figure that receives in described display
In picture, the color apart from all grid of identical of the central point of the checkerboard image receiving apart from described display is identical, then
The method of described detection display also includes：
When judging that described display does not have obvious display defect, by the center apart from accessed checkerboard image
Point apart from identical grid as same group of grid, and calculate the dispersion degree of the color of each group of grid；
Judge whether that the dispersion degree of the color of one group of grid is more than discrete threshold values；
If so, then judge that described display has negative and positive screen defect；
If it is not, then judging that described display does not have negative and positive screen defect.
3. as claimed in claim 1 or 2 detection display method it is characterised in that the method for described detection display also
Including：
When judging that described display does not have obvious display defect, for each in accessed checkerboard image
Individual grid, calculates the ratio shared by the corresponding frequency range of each color in this grid, and each color in this grid is corresponded to
The ratio shared by frequency range be ranked up from big to small；
Judge that whether there is the ratio shared by frequency range having sequence second in the grid of described checkerboard image is more than proportion threshold value；
If so, then judge that described display has the defect of bright concealed wire or crackle；
If it is not, then judging that described display does not have the defect of bright concealed wire or crackle.
4. the method for detection display as claimed in claim 1 is it is characterised in that the method for described detection display is also wrapped
Include：
The display brightness value of each grid is obtained from accessed checkerboard image；
For each grid, calculate the display brightness value of this grid and normal brightness value corresponding with this grid between the two
Luminance difference；
Calculate the quadratic sum of the luminance difference of all grid, obtain the luminance deviation degree of described checkerboard image；
Judge whether described luminance deviation degree is more than luminance deviation threshold value；
If so, then judge that the brightness of described display is partially dark or partially bright, or judge that described display has local speck or skin dark stain；
If it is not, then judge described display brightness normal.
5. the method for detection display as claimed in claim 1 is it is characterised in that the method for described detection display is also wrapped
Include：
When judging that described display has obvious display defect, calculate each of accessed checkerboard image
The coordinate of angle point；
According to the coordinate of each angle point, select the angular coordinate of the grid being not belonging in described checkerboard image from described angle point
Angle point；
The angle point of selection is fallen grid region as the area that there is obvious display defect in described display
Domain.
6. a kind of device of detection display is it is characterised in that include：
Control display module, for controlling picture signal generator to generate checkerboard image, and control described image signal generator
Described checkerboard image is sent to display to be detected, so that the described checkerboard image receiving is shown by described display
Show；Wherein, described checkerboard image includes N × M grid, and described checkerboard image includes at least two different grid colors, and
The color of the arbitrary neighborhood grid transversely or on vertical differs；
Control taking module, for the checkerboard image controlling camera shooting to show on the display, and obtain described camera
The checkerboard image photographing；
Angle point judge module, whether the angle point quantity for judging accessed checkerboard image is H, H=(N+1) × (M+1)；
First determination module, for when the angle point quantity of accessed checkerboard image is for H, judging that described display is not deposited
In obvious display defect；
Second determination module, for when the angle point quantity of accessed checkerboard image is not H, judging that described display exists
Obvious display defect.
7. the device of detection display as claimed in claim 6 is it is characterised in that the chessboard figure that receives in described display
In picture, the color apart from all grid of identical of the central point of the checkerboard image receiving apart from described display is identical, then
The device of described detection display also includes：
Dispersion degree computing module, for judge described display there is not obvious display defect when, will be apart from institute
The central point of the checkerboard image getting apart from identical grid as same group of grid, and calculate the color of each group of grid
Dispersion degree；
Dispersion degree judge module, the dispersion degree for judging whether the color of one group of grid is more than discrete threshold values；
3rd determination module, described for when there are the dispersion degree of color of one group of grid more than discrete threshold values, judging
There is negative and positive screen defect in display；
4th determination module, for when not there are the dispersion degree of color of one group of grid more than discrete threshold values, judging institute
State display and there is not negative and positive screen defect.
8. as claimed in claims 6 or 7 detection display device it is characterised in that the device of described detection display also
Including：
Color-ratio computing module, for when judging that described display does not have obvious display defect, for being obtained
Each of checkerboard image got grid, calculates the ratio shared by the corresponding frequency range of each color in this grid, and will
In this grid, the ratio shared by the corresponding frequency range of each color is ranked up from big to small；
Color-ratio judge module, has the frequency range institute of sequence second for judging to whether there is in the grid of described checkerboard image
The ratio accounting for is more than proportion threshold value；
5th determination module, for when there are in the grid of described checkerboard image sequence second frequency range shared by ratio be more than
During proportion threshold value, judge that described display has the defect of bright concealed wire or crackle；
6th determination module, for when not there are in the grid of described checkerboard image sequence second frequency range shared by ratio big
When proportion threshold value, judge that described display does not have the defect of bright concealed wire or crackle.
9. the device of detection display as claimed in claim 6 is it is characterised in that the device of described detection display also wraps
Include：
Display brightness acquisition module, for obtaining the display brightness value of each grid from accessed checkerboard image；
Luminance difference computing module, for for each grid, calculating the display brightness value of this grid and corresponding with this grid
Normal brightness value luminance difference between the two；
Luminance deviation computing module, for calculating the quadratic sum of the luminance difference of all grid, obtains the bright of described checkerboard image
Degree extent of deviation；
Luminance deviation judge module, for judging whether described luminance deviation degree is more than luminance deviation threshold value；
7th determination module, for when described luminance deviation degree is more than luminance deviation threshold value, judging the bright of described display
Degree is partially dark or partially bright, or judges that described display has local speck or skin dark stain；
8th determination module, for when described luminance deviation degree is not more than luminance deviation threshold value, judging described display
Brightness is normal.
10. the device of detection display as claimed in claim 6 is it is characterised in that the device of described detection display also wraps
Include：
Angular coordinate computing module, for when judging that described display has obvious display defect, calculating acquired
The coordinate of each of checkerboard image arriving angle point；
Angle point chooses module, for the coordinate according to each angle point, selects and be not belonging to described chessboard figure from described angle point
The angle point of the angular coordinate of grid in picture；
Defect area determining module, for the angle point of selection is fallen grid region aobvious as existing in described display
And the region of the display defect being clear to.
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