CN107024339A - A kind of test device and method for wearing display device - Google Patents
A kind of test device and method for wearing display device Download PDFInfo
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- CN107024339A CN107024339A CN201710264597.4A CN201710264597A CN107024339A CN 107024339 A CN107024339 A CN 107024339A CN 201710264597 A CN201710264597 A CN 201710264597A CN 107024339 A CN107024339 A CN 107024339A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/04—Optical benches therefor
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Abstract
The present invention relates to a kind of test device and method for wearing display device, to solve to wear the problem of display device optical property is detected.Including caliberating device, wear display device calibration apparatus, image receiving system, image processing system and guide rail；Caliberating device, including support and scaling board, support are mounted on fixed guide rail, guide rail is placed in the centre position of two cameras, support is placed in front of camera lens, and support can adjust length along being stretched perpendicular to ground direction, and can be moved to setting position along guide rail direction；Display device calibration apparatus is worn, is constituted by wearing display device displacement platform and fixing device, display device is worn in described fixing device, the fixing device is arranged on described wear on display device displacement platform；Image processing system, is made up of computer, is connected by netting twine with two cameras.With advantages below：Can complete detection wear the imaging features and optical property of display device, detection is reliable, and speed is fast, and cost is low.
Description
Technical field
The present invention relates to a kind of test device, more particularly to a kind of device for wearing display device optical performance test and side
Method.
Background technology
The existing optical performance test for wearing display device depends on human eye evaluation.Due to human eye evaluate subjectivity compared with
By force, no quantization standard, the features such as interpersonal deviation is big, it is impossible to suitable for the image quality evaluation for wearing display device.And lack
The evaluable methods for wearing display device of number, function is single, and testing cost is high, complex operation, and time-consuming.Retouched based on above-mentioned
State, how to solve to wear the problem of display device optical property is detected as the task of top priority.
The content of the invention
In view of the above-mentioned problems, the technical problems to be solved by the invention are to provide a kind of test device for wearing display device
And method, to solve to wear the problem of display device optical property is detected.
In order to solve the above technical problems, the present invention takes following technical scheme：
A kind of test device for wearing display device, it is characterised in that it include caliberating device, wear display device calibration apparatus,
Image receiving system, image processing system and guide rail；
Image receiving system, by the object lens of structure identical first and the second object lens, structure identical first camera and second camera,
Structure identical first camera displacement platform and second camera displacement platform and base composition, the first object lens are fixed on first camera
On, the second object lens are fixed in second camera, and first camera is arranged on first camera displacement platform, and second camera is arranged on the
On two camera displacement platforms, first camera displacement platform and second camera displacement platform are fixed on base, and the first object lens,
The optical axis of second object lens is parallel to each other, the photosurface of first camera and second camera photo-sensitive cell respectively with the first object lens and second
The image plane of object lens is overlapped, and the camera lens of first camera and second camera is respectively aligned to wear two display modules of display device,
Optical axis where the optical axis and first camera and second camera of two display modules of display device are worn in adjustment is conllinear, the first phase
Machine and second camera are provided with image pick-up card, and the testing image collected is uploaded to image processing system and carried out by image pick-up card
Analysis and processing；
Caliberating device, including support and scaling board, support are mounted on fixed guide rail, and guide rail is placed in the centre position of two cameras,
Support is placed in front of camera lens, and support can adjust length along being stretched perpendicular to ground direction, and can be along guide rail
Direction is moved to setting position；
Display device calibration apparatus is worn, is constituted by wearing display device displacement platform and fixing device, display device peace is worn
In described fixing device, the fixing device is arranged on described wear on display device displacement platform；
Image processing system, is made up of computer, is connected by netting twine with two cameras.
The scaling board includes being printed on the scaling board a of grid reference pattern and is printed on the mark of oblique quadrate array reference pattern
Fixed board b.
Described image processing system, including an input block, a display unit, a memory cell and an image procossing list
Member, described graphics processing unit includes image import modul, skew test module, ken test module, ROI identifying processings
Module and test module, the image import modul are used for the input information for receiving input block transmission, the root after the information is recognized
Instruction is imported according to information one image of generation is inputted, control image receiving system acquisition wears the image of display device and will be acquired
Image be shown in display unit, the skew test module be used for demarcate test device and detection wear display device center it is inclined
The angle of shifting amount and the binocular optical axis, the ken test module is used to detect the ken FOV sizes for wearing display device, and the ROI knows
Other processing module is used to extracting video image interest region ROI image, the test module be used for according to identified FOV and
ROI is measured to the display performance for wearing display device.
The ken test module includes a boundary point detection sub-module and a summit detection sub-module, the boundary points detection
Submodule is used for pixel, position and its gray value for detecting the boundary line of acquired image, and summit detection sub-module is used to detect
Pixel, position and its gray value on the summit of acquired image.
The ROI recognition processing modules include ROI and recognize submodule and ROI processing submodules, and the ROI recognizes submodule
For recognizing the ROI in acquired image, the ROI processing submodule is used to carry out image procossing and analysis to acquired ROI.
A kind of method of testing for the test device for wearing display device, it is characterised in that wear display device including detection
Ken FOV method, is comprised the following steps that：
61）The interface of two cameras in image receiving system is connected with exchange interface with two netting twines, and will be schemed with netting twine
As the computer of processing system is connected with interchanger；
62）Support is moved to setting position along guide rail direction, and the scaling board a for being printed on grid reference pattern is fixed on described branch
On frame, adjustment support makes the centre-height between scaling board a centre-heights and two cameras consistent；
63）The zoom ring of regulation first camera and second camera makes both focal lengths equal, and makes scaling board image entirely full of bat
The focusing ring of picture, regulation first camera and second camera is taken the photograph, the scaling board image clearly for photographing both adjusts the first phase
The aperture blades of machine and second camera, make the equal picture brightness of both aperture sizes moderate；
64）The picture that first camera and second camera are shot is read, picture catercorner length a is obtained0；
65）By display device to be measured of wearing installed in wearing in the fixing device of display device calibration apparatus, display is worn in adjustment
Optical axis where the optical axis and first camera and second camera of two display modules of equipment is conllinear；
66）Detection is to be measured to wear display device picture area marginal position and obtains and to be measured wear display device picture diagonal line length
A is spent, by length a, step 64）In catercorner length a0, first camera and the focal length f and first camera of second camera and
Two camera picture size y calculate the FOV for wearing display device respectively:FOV=a/a0*2*arctan(y/2f)。
A kind of method of testing for the test device for wearing display device, it is characterised in that wear display device including detection
The method of optical-modulation transfer function, step is as follows：
71）The interface of two cameras in image receiving system is connected with exchange interface with two netting twines, and will be schemed with netting twine
As the computer of processing system is connected with interchanger；
72）Support is moved to setting position along guide rail direction, and the scaling board b for being printed on oblique quadrate array reference pattern is fixed on
On described support, adjustment support makes the centre-height between scaling board b centre-heights and two cameras consistent；
73）The zoom ring of regulation first camera and second camera makes both focal lengths equal, and makes scaling board image entirely full of bat
The focusing ring of picture, regulation first camera and second camera is taken the photograph, the scaling board image clearly for photographing both adjusts the first phase
The aperture blades of machine and second camera, make the equal picture brightness of both aperture sizes moderate；
74）The picture that first camera and second camera are shot is read, the modulation transmission at least one interest region in picture is calculated
Function mtf value, calculates modulation transfer function value and includes numerical value in display unit, adjustment focusing ring finds modulation in real time
The maximum position of transmission function, the modulating transfer function value of record now is the modulating transfer function value MTF of test system0；
If interest region has several, the modulation transfer function in all interest regions is recorded0(1)、MTF0(2)、…、MTF0(n) it is
The modulating transfer function value of test system；
75）By display device to be measured of wearing installed in wearing in the fixing device of display device calibration apparatus, display is worn in adjustment
Optical axis where the optical axis and first camera and second camera of two display modules of equipment is conllinear；
76）By display device mainboard in itself or the control panel to be measured worn in two display modules to be measured for wearing display device
Center respectively produce an oblique quadrate array test chart, by after the optical system to be measured for wearing display device understand in the first thing
Mirror and the second object lens object plane produce the virtual image, after the first object lens and the second object lens, in the photosensitive of first camera and second camera
Picture is produced on element respectively；
77）The picture that first camera and second camera are shot is read, step 74 in picture is calculated）At least one selected interest
The modulation transfer function value in region, calculates modulation transfer function value and includes numerical value in display unit, adjustment in real time
Focusing ring finds the maximum position of modulation transfer function, and the modulating transfer function value of record now is to wear display device and survey
The modulating transfer function value MTF of test system cascade1；If interest region has several, the modulation transmission in all interest regions is recorded
Function MTF1(1)、MTF1(2)、…、MTF1(n) modulating transfer function value cascaded for test system；
78）By test system modulating transfer function value MTF0With the MTF for wearing display device and system cascade1Value can be worn
The modulation transfer function of display device：MTF(n)=MTF1(n)/MTF0(n)。
The method of testing of a kind of test device for wearing display device, it is characterised in that wear display including detection and set
Standby eccentric position and the method for off-axis size, step are as follows：
81）The interface of two cameras in image receiving system is connected by two netting twines with exchange interface, and with netting twine by image
The computer of processing system is connected with interchanger；
82）Support is moved to setting position along guide rail direction, and the scaling board a for being printed on grid reference pattern is fixed on described branch
On frame, adjustment support makes the centre-height between scaling board a centre-heights and two cameras consistent；
83）The zoom ring of regulation first camera and second camera makes both focal lengths equal, and makes scaling board image entirely full of bat
The focusing ring of picture, regulation first camera and second camera is taken the photograph, the scaling board image clearly for photographing both adjusts the first phase
The aperture blades of machine and second camera, both formulas equal picture brightness of aperture size is moderate；
84）The picture that first camera and second camera are shot is read, the relative position at the center of first camera and scaling board is demarcated
With second camera and the relative position at the center of scaling board and recording nominal data；
85）Display device to be measured of wearing is installed in wearing in the fixing device of display device calibration apparatus, and adjustment is worn display and set
Optical axis where the optical axis and first camera and second camera of two standby display modules is conllinear；
86）The mainboard or control panel of display device in itself are worn by be measured, in two display moulds to be measured for wearing display device
The center of block is respectively produced can be in the first object lens and the second object lens after a cross picture, the optical system by wearing display device
Object plane produce the cross virtual image, after the first object lens and the second object lens, first camera and second camera photosurface distinguish
Produce cross picture；
87）According to nominal data and wear display device and calculated in the cross image position data of first camera and second camera
Wear the center displacement amount and optical axis deviation of display device.
The present invention is due to taking above technical scheme, and it has advantages below：
1）, can complete detection wear the imaging features and optical property of display device
2）, detection it is reliable, speed is fast
3）, cost it is low.
Brief description of the drawings
Fig. 1 is the system general diagram for wearing display equipment test device
Fig. 2 is test device calibration apparatus and image receiving system structure chart
Fig. 3 is the functional block diagram of test device processing system
Fig. 4 is to offset the flow chart that test module demarcates test device
Fig. 5 is skew test module flow chart
Fig. 6 a are scaling board a patterns
Fig. 6 b are scaling board b patterns
Fig. 6 c are lighting apparatus structural representations
Fig. 7 is the test equipment ken (FOV) test flow chart.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
The present invention provides a kind of test device for wearing display device, includes the detection of modulation transfer function, image space
Detection, the detection of distortion and the detection of binocular ranging.
Below first exemplified by testing intelligent glasses, the embodiment to the present invention is described.
Fig. 1 is the system general diagram of one embodiment of the present of invention test device, as seen from Figure 1：The system bag of the present invention
Include caliberating device, wear display device calibration apparatus, image receiving system, image processing system, output system and guide rail.Demarcation
Device pattern is made up of the oblique quadrate array benchmark of big visual field grid reference and big visual field.Image processing system is by calculating mechanism
Into output system shows result and data.
Referring to Fig. 2, Fig. 2 is to wear display device calibration apparatus and image receiving system structure chart.Image receiving system
It is made up of image pick-up card, camera, displacement platform and base etc., camera can be CCD camera, CMOS cameras or other digital phases
CCD camera is used in machine, the present embodiment, specifically, image receiving system is by structure identical the first object lens 21 and the second object lens
22, structure identical the first CCD camera 23 and the second CCD camera 24, the first CCD camera of structure identical displacement platform 25 and
Two CCD camera displacement platforms 26 and base 27 are constituted, and its position relationship is：The first described object lens are fixed on described first
In CCD camera, the second object lens are fixed in the second described CCD camera, and the first CCD camera is arranged on the first described CCD phases
On machine displacement platform, the second CCD camera is arranged on the second described CCD camera displacement platform, then by the first described CCD phases
Machine displacement platform and the second CCD camera displacement platform are fixed on described base, and described the first object lens, the second object lens
Optical axis be parallel to each other, the first described CCD camera and the photosurface of the second CCD camera photo-sensitive cell are respectively with described
The image plane of one object lens and the second object lens is overlapped；Described structure identical the first CCD camera displacement platform and the second CCD camera
Displacement platform is made up of XYZR four axis platforms, and the XYZR four axis platforms are four axle precision surface plates.The first described object lens and second
The lens group and shell mechanism part that object lens are made up of polylith lens are constituted.The shell mechanism part include focusing ring, zoom ring,
Aperture blades and scale.The display device calibration apparatus of wearing is by wearing 29 groups of display device displacement platform 28 and fixing device
Into.Display device is worn in described fixing device 29, described fixing device 29 wears display installed in described
On equipment displacement platform 28.Wear display device displacement platform 28 to be made up of XYZ three-axis platforms, the XYZ three-axis platforms are three axles
Precision surface plate.Wearing display device calibration apparatus is used for the position that display device is worn in adjustment, during test, is filled by adjusting adjustment
Put and CCD camera displacement platform, the camera lens of the first CCD camera and the second CCD camera is respectively aligned to wear the two of display device
Individual display module, adjustment is worn where the optical axis and the first CCD camera and the second CCD camera of two display modules of display device
Optical axis it is conllinear, wear two display module pictures of display device so that the first CCD camera and the second CCD camera are shot and show
Image（That is testing image）, the first CCD camera 23 and the second CCD camera 24 are provided with image pick-up card, and image pick-up card will be adopted
The testing image collected is uploaded to image processing system and is analyzed and handled.
Referring to Fig. 3, Fig. 3 is test device image processing system block diagram.The image processing system is made up of computer, bag
Include an input block, a display unit, a memory cell and a graphics processing unit.User passes through operation equipment display picture
With obtain testing image, and testing image is inputted to the processing unit.The display unit is used to show test process, test shadow
Picture and its processing result of calculation.The memory cell is used to store the data generated in test process and the head acquired in CCD camera
Wear the image of display device.
The graphics processing unit includes image import modul, skew test module, ken test module, ROI (region
Of interest, area-of-interest) recognition processing module and test module.The image import modul is used to receive input block
The input information of transmission, produces image importing instruction according to input information after the information is recognized, controls image receiving system
Obtain the image for wearing display device and acquired image is shown in display unit.The skew test module, which is used to demarcate, to be surveyed
The angle of the center offset for wearing display device and the binocular optical axis is put and detected in trial assembly.The ken test module is used for detection head
Wear the ken of display device（FOV）Size, including a boundary point detection sub-module and a summit detection sub-module.The boundary point is examined
Pixel, position and its gray value that submodule is used to detect the boundary line of acquired image are surveyed, summit detection sub-module is used for
Pixel, position and its gray value on the summit of the acquired image of detection, the boundary points detection submodule and summit detection submodule
Function performed by block refers to Fig. 3.
The ROI recognition processing modules are used to extract video image interest region（ROI）Image, including ROI identification submodule
Block and ROI processing submodules.Described ROI identification submodules are used to recognize the ROI in acquired image, described ROI processing
Submodule is used to carry out image procossing and analysis to acquired ROI.
The test module is used to measure the optical property for wearing display device according to identified FOV and ROI.
Such as modulation transfer function（MTF）Deng.
Fig. 4 for skew test module demarcate test device flow chart, skew test module demarcation test device include with
Lower step：Uncalibrated image is gathered, and translation, boresight error are calculated and image rectification.Specifically include following steps：1）Scaling board is put
It is placed on guide rail apart from CCD camera camera lens just to front 1m Wai Chu regions, is preferably placed at apart from CCD camera camera lens just to front
At 3-5m, scaling board simultaneously illuminates scaling board with light source, adjusts the focusing ring of the first object lens and the second object lens and makes the image of its acquisition
Clearly；2）In the cross image of one long a width of 200 pixel of image center position display acquired in CCD camera, judge described
Cross image center with demarcation pattern center coordinate difference whether default maximum deviation receive in the range of；3）If judging knot
Fruit is the records center coordinate difference, if judged result is not to receive scope in maximum deviation in the range of maximum deviation receiving
Interior, then readjust the first object lens and the second object lens, repeat step 2）；4）The centre coordinate difference and graphics processing unit are pre-
If centre coordinate difference be compared, both compare after difference be CCD camera system testing boresight error.
Fig. 5 wears the flow chart of the center offset and binocular vision axle clamp angle of display device for skew test module detection.
Comprise the following steps：1) display device will be worn to be fixed in the fixing device 29 for wearing display device calibration apparatus, worn aobvious
Show that device systems display picture is set to cross pattern, clear position, 2 are arrived in focusing）Locate position beyond CCD camera of just adjusting the distance 1m
Grid scaling board is put, grid scaling board is preferably placed in front of CCD camera at 3-5m, 3）Calculated by pixel position
Coordinate position of the cross on grid, 4）Acquisition is calculated by coordinate position of the cross on grid and wears display device bias partially
Shifting amount.
The caliberating device includes support and is printed on the scaling board a of grid reference pattern and is printed on oblique quadrate array reference map
The scaling board b of case.As shown in Figure 6 a, described scaling board b pattern is as shown in Figure 6 b for described scaling board a pattern.Demarcation
Plate a and scaling board b can be securely fitted on support when using, and freely can be dismantled and be changed.Scaling board b is tiltedly square by 33
Shape and ladder square pattern composition.Support is on the guide rail, and guide rail is placed in the centre position of two cameras, guideway centreline with two
Centre position alignment between CCD camera, support is placed in front of CCD camera camera lens, and away from place, support energy beyond CCD camera 1m
It is enough to adjust length along being stretched perpendicular to ground direction, and setting position can be moved to along guide rail direction.Described demarcation
Plate a and scaling board b size are the cm of 110 x 187, and the structure of lighting apparatus is as fig. 6 c.Lighting apparatus is as illuminating mark
The light source of fixed board.
Fig. 7 is the flow chart that ken detection module detects FOV, and display equipment test device detection head is worn using above-mentioned
A kind of embodiment of the FOV of display device method is worn, is comprised the following steps：
1）, image receiving system base is placed in the plane of horizontal level about 1.5m or so height, be easy to operator to manipulate；
2）, with two netting twines the interface of two CCD cameras in image receiving system is connected with exchange interface, and will with netting twine
The computer of image processing system is connected with interchanger；
3）, support be moved to setting position along guide rail direction, in front of CCD camera outside guide rail 1m locate placement described in support,
Support is preferably placed in front of CCD camera at 3-5m, and scaling board a is fixed on described support, scaling board a centre-heights
Centre-height between two CCD cameras is consistent, and light source is placed as fig. 6 c and illuminates scaling board a；
4）, the first CCD camera of regulation and the zoom ring of the second CCD camera make both focal lengths equal, and make scaling board image whole
Full of shooting picture, the focusing ring of the first CCD camera of regulation and the second CCD camera, the scaling board image for photographing both is clear
Clear, the aperture blades of the first CCD camera of regulation and the second CCD camera make the equal picture brightness of both aperture sizes moderate；
5）, read the picture that the first CCD camera and the second CCD camera are shot, obtain picture catercorner length a0；
6）, by it is to be measured wear display device be arranged on wear in the fixing device 29 of display device calibration apparatus, adjustment is worn aobvious
Optical axis where showing the optical axis and the first CCD camera and the second CCD camera of two display modules of equipment is conllinear；
7）, detect it is to be measured wear display device picture area marginal position and obtain to be measured wear display device picture diagonal line length
A is spent, by length a, step 5）In catercorner length a0, the first CCD camera and the second CCD camera focal length f and the first CCD
Camera and the second CCD camera picture size y calculate the FOV for wearing display device respectively:
FOV=a/a0*2*arctan(y/2f) 。
Eccentric position and off-axis size that display device is worn in display equipment test device detection are worn using above-mentioned
A kind of embodiment of method, comprises the following steps：
1）, image receiving system base is placed in the plane of horizontal level about 1.5m or so height, be easy to operator to manipulate；
2）, with two netting twines the interface of two CCD cameras in image receiving system is connected with exchange interface, and will with netting twine
The computer of image processing system is connected with interchanger；
3）, support be moved to setting position along guide rail direction, place places described outside two image center 1m of distance on guide rail
Support, support is preferably placed at the 3-5m places in front of the CCD camera, and scaling board a is fixed on support, scaling board a centers height
Degree is consistent with the centre-height between two CCD cameras.Light source is placed as fig. 6 c illuminates scaling board a；
4）, the first CCD camera of regulation and the zoom ring of the second CCD camera make both focal lengths equal, and make scaling board image whole
Full of shooting picture.The focusing ring of the first CCD camera and the second CCD camera is adjusted, the scaling board image for photographing both is clear
It is clear.Adjust the aperture blades of the first CCD camera and the second CCD camera, both formulas equal picture brightness of aperture size is moderate；
5）, read the picture that the first CCD camera and the second CCD camera are shot, the center of the first CCD camera of demarcation and scaling board
The relative position at the center of relative position and the second CCD camera and scaling board simultaneously records nominal data；
6）, by it is to be measured wear display device be arranged on wear in the fixing device 29 of display device calibration apparatus, adjustment is worn aobvious
Optical axis where showing the optical axis and the first CCD camera and the second CCD camera of two display modules of equipment is conllinear；
7）, by be measured the mainboard or control panel of display device in itself are worn, in two display moulds to be measured for wearing display device
The center of block is respectively produced can be in the first object lens and the second object lens after a cross picture, the optical system by wearing display device
Object plane produce the cross virtual image, after the first object lens and the second object lens, in the photosensitive of the first CCD camera and the second CCD camera
Cross picture is produced on face respectively；
8）, according to nominal data and wear display device in the first CCD camera and the cross image position data of the second CCD camera
Calculate the center displacement amount and optical axis deviation for wearing display device.
Utilize the above-mentioned side that the optical-modulation transfer function of display device is worn in display equipment test device detection that wears
A kind of instantiation mode of method, comprises the following steps：
1）, image receiving system base is placed in the plane of horizontal level about 1.5m or so height, be easy to operator to manipulate；
2）, with two netting twines the interface of two CCD cameras in image receiving system is connected with exchange interface, and will with netting twine
The computer of image processing system is connected with interchanger；
3）, support be moved to setting position along guide rail direction, on guide rail beyond two image center 1m of distance place place institute
The support stated, support is preferably placed in front of CCD camera at 3-5m, and scaling board b is fixed on described support, adjustment branch
Frame makes the centre-height between scaling board b centre-heights and two cameras consistent.Light source is placed as fig. 6 c illuminates scaling board
b；
4）, the first CCD camera of regulation and the zoom ring of the second CCD camera make both focal lengths equal, and make scaling board image whole
Full of shooting picture, the focusing ring of the first CCD camera of regulation and the second CCD camera, the scaling board image for photographing both is clear
Clear, the aperture blades of the first CCD camera of regulation and the second CCD camera make the equal picture brightness of both aperture sizes moderate；
5）, read the picture that the first CCD camera and the second CCD camera are shot, calculate the tune at least one interest region in picture
Modulation trnasfer function mtf value, calculates modulation transfer function and includes numerical value in display unit, adjustment focusing ring is found in real time
The maximum position of modulation transfer function, the modulating transfer function value of record now is the modulating transfer function value of test system
MTF0.If interest region has several, the modulation transfer function in all interest regions is recorded0(1)、MTF0(2)、…、MTF0
(n) it is the modulating transfer function value of test system；
6）, by it is to be measured wear display device be arranged on wear in the fixing device 29 of display device calibration apparatus, adjustment is worn aobvious
Optical axis where showing the optical axis and the first CCD camera and the second CCD camera of two display modules of equipment is conllinear；
7）, by display device mainboard in itself or the control panel to be measured worn in two display modules to be measured for wearing display device
Center respectively produce an oblique quadrate array test chart, the oblique quadrate array figure as shown in Fig. 6 b, by it is to be measured wear it is aobvious
The virtual image can be produced after the optical system of equipment in the first object lens and the second object lens object plane by showing, by the first object lens and the second object lens
Afterwards, picture is produced respectively on the photosurface of the first CCD camera and the second CCD camera；
8）, read the picture that the first CCD camera and the second CCD camera are shot, calculate step 5 in picture）Selected at least one
The modulation transfer function value in individual interest region, calculates modulation transfer function and includes numerical value in display unit, adjustment in real time
Focusing ring finds the maximum position of modulation transfer function, and the modulating transfer function value of record now is to wear display device and survey
The modulating transfer function value MTF of test system cascade1.If interest region has several, the modulation transmission in all interest regions is recorded
Function MTF1(1)、MTF1(2)、…、MTF1(n) it is to wear the modulating transfer function value that display device and test system are cascaded；
9）, by test system modulating transfer function value MTF0With the MTF for wearing display device and system cascade1Value can be worn
The modulation transfer function (n) of display device=MTF1(n)/MTF0(n)。
Embodiments of the present invention are explained in detail above in conjunction with accompanying drawing, but the present invention is not limited to above-mentioned implementation
Mode, in the knowledge that one skilled in the art possess, can also not depart from the premise of present inventive concept
Under make a variety of changes.
Claims (10)
1. a kind of test device for wearing display device, it is characterised in that it includes caliberating device, wears display device adjustment dress
Put, image receiving system, image processing system and guide rail；
Image receiving system, by the object lens of structure identical first and the second object lens, structure identical first camera and second camera,
Structure identical first camera displacement platform and second camera displacement platform and base composition, the first object lens are fixed on first camera
On, the second object lens are fixed in second camera, and first camera is arranged on first camera displacement platform, and second camera is arranged on the
On two camera displacement platforms, first camera displacement platform and second camera displacement platform are fixed on base, and the first object lens,
The optical axis of second object lens is parallel to each other, the photosurface of first camera and second camera photo-sensitive cell respectively with the first object lens and second
The image plane of object lens is overlapped, and the camera lens of first camera and second camera is respectively aligned to wear two display modules of display device,
Optical axis where the optical axis and first camera and second camera of two display modules of display device are worn in adjustment is conllinear, the first phase
Machine and second camera are provided with image pick-up card, and the testing image collected is uploaded to image processing system and carried out by image pick-up card
Analysis and processing；
Caliberating device, including support and scaling board, support are mounted on fixed guide rail, and guide rail is placed in the centre position of two cameras,
Support is placed in front of camera lens, and support can adjust length along being stretched perpendicular to ground direction, and can be along guide rail
Direction is moved to setting position；
Display device calibration apparatus is worn, is constituted by wearing display device displacement platform and fixing device, display device peace is worn
In described fixing device, the fixing device is arranged on described wear on display device displacement platform；
Image processing system, is made up of computer, is connected by netting twine with two cameras.
2. a kind of test device for wearing display device as claimed in claim 1, it is characterised in that：The scaling board includes print
There is the scaling board a of grid reference pattern and be printed on the scaling board b of oblique quadrate array reference pattern.
3. a kind of test device for wearing display device as claimed in claim 1, it is characterised in that：Described image procossing system
System, including an input block, a display unit, a memory cell and a graphics processing unit, the described graphics processing unit
Including image import modul, skew test module, ken test module, ROI recognition processing modules and test module, the image is led
Enter the input information that module is used to receive input block transmission, producing an image according to input information after the information is recognized imports
Instruction, control image receiving system obtains the image for wearing display device and acquired image is shown in into display unit, should
Skew test module is used to demarcate test device and the center offset of display device and the angle of the binocular optical axis are worn in detection, should
Ken test module is used to detect the ken FOV sizes for wearing display device, and the ROI recognition processing modules are used to extract video shadow
As interest region ROI image, the test module is used for the display for wearing display device to this according to identified FOV and ROI
Performance is measured.
4. a kind of test device for wearing display device as claimed in claim 3, it is characterised in that：The ken test module
Including a boundary point detection sub-module and a summit detection sub-module, the boundary points detection submodule is used to detect acquired image
Boundary line pixel, position and its gray value, summit detection sub-module is used for pixel, the position for detecting the summit of acquired image
Put and its gray value.
5. a kind of test device for wearing display device as claimed in claim 3, it is characterised in that：The ROI identifying processings
Module includes ROI and recognizes submodule and ROI processing submodules, and the ROI identifications submodule is used to recognize in acquired image
ROI, the ROI processing submodule is used to carry out image procossing and analysis to acquired ROI.
6. a kind of method of testing for the test device for wearing display device as described in any one of claim 1 to 5, it is characterised in that
The method that the ken FOV of display device is worn including detection, is comprised the following steps that：
61) interface of two cameras in image receiving system is connected with exchange interface with two netting twines, and will be schemed with netting twine
As the computer of processing system is connected with interchanger；
62) support is moved to setting position along guide rail direction, and the scaling board a for being printed on grid reference pattern is fixed on described branch
On frame, adjustment support makes the centre-height between scaling board a centre-heights and two cameras consistent；
63) zoom ring of regulation first camera and second camera makes both focal lengths equal, and makes scaling board image entirely full of bat
The focusing ring of picture, regulation first camera and second camera is taken the photograph, the scaling board image clearly for photographing both adjusts the first phase
The aperture blades of machine and second camera, make the equal picture brightness of both aperture sizes moderate；
64) picture that first camera and second camera are shot is read, picture catercorner length a is obtained0；
65) by display device to be measured of wearing installed in wearing in the fixing device of display device calibration apparatus, display is worn in adjustment
Optical axis where the optical axis and first camera and second camera of two display modules of equipment is conllinear；
66) detect it is to be measured wear display device picture area marginal position and obtain to be measured wear display device picture diagonal line length
Spend a, by length a, step 64) in catercorner length a0, first camera and the focal length f and first camera of second camera and
Two camera picture size y calculate the FOV for wearing display device respectively:FOV=a/a0*2*arctan(y/2f)。
7. a kind of method of testing for the test device for wearing display device as described in any one of Claims 1-4, it is characterised in that
The method that the optical-modulation transfer function of display device is worn including detection, step is as follows：
71) interface of two cameras in image receiving system is connected with exchange interface with two netting twines, and will be schemed with netting twine
As the computer of processing system is connected with interchanger；
72) support is moved to setting position along guide rail direction, and the scaling board b for being printed on oblique quadrate array reference pattern is fixed on
On described support, adjustment support makes the centre-height between scaling board b centre-heights and two cameras consistent；
73) zoom ring of regulation first camera and second camera makes both focal lengths equal, and makes scaling board image entirely full of bat
The focusing ring of picture, regulation first camera and second camera is taken the photograph, the scaling board image clearly for photographing both adjusts the first phase
The aperture blades of machine and second camera, make the equal picture brightness of both aperture sizes moderate；
74) picture that first camera and second camera are shot is read, the modulation transmission at least one interest region in picture is calculated
Function mtf value, calculates modulation transfer function value and includes numerical value in display unit, adjustment focusing ring finds modulation in real time
The maximum position of transmission function, the modulating transfer function value of record now is the modulating transfer function value MTF of test system0；
If interest region has several, the modulation transfer function in all interest regions is recorded0(1)、MTF0(2)、…、MTF0(n) it is
The modulating transfer function value of test system；
75) by display device to be measured of wearing installed in wearing in the fixing device of display device calibration apparatus, display is worn in adjustment
Optical axis where the optical axis and first camera and second camera of two display modules of equipment is conllinear；
76) by display device mainboard in itself or the control panel to be measured worn in two display modules to be measured for wearing display device
Center respectively produce an oblique quadrate array test chart, by after the optical system to be measured for wearing display device understand in the first thing
Mirror and the second object lens object plane produce the virtual image, after the first object lens and the second object lens, in the photosensitive of first camera and second camera
Picture is produced on element respectively；
77) read the picture that first camera and second camera are shot, calculate step 74 in picture) selected by least one interest
The modulation transfer function value in region, calculates modulation transfer function value and includes numerical value in display unit, adjustment in real time
Focusing ring finds the maximum position of modulation transfer function, and the modulating transfer function value of record now is to wear display device and survey
The modulating transfer function value MTF of test system cascade1；If interest region has several, the modulation transmission in all interest regions is recorded
Function MTF1(1)、MTF1(2)、…、MTF1(n) modulating transfer function value cascaded for test system；
78) by test system modulating transfer function value MTF0With the MTF for wearing display device and system cascade1Value can be worn
The modulation transfer function of display device：MTF (n)=MTF1(n)/MTF0(n)。
8. a kind of method of testing for the test device for wearing display device as described in any one of Claims 1-4, it is characterised in that
The method that the eccentric position and off-axis size of display device are worn including detection, step is as follows：
81) interface of two cameras in image receiving system is connected by two netting twines with exchange interface, and with netting twine by image
The computer of processing system is connected with interchanger；
82) support is moved to setting position along guide rail direction, and the scaling board a for being printed on grid reference pattern is fixed on described branch
On frame, adjustment support makes the centre-height between scaling board a centre-heights and two cameras consistent；
83) zoom ring of regulation first camera and second camera makes both focal lengths equal, and makes scaling board image entirely full of bat
The focusing ring of picture, regulation first camera and second camera is taken the photograph, the scaling board image clearly for photographing both adjusts the first phase
The aperture blades of machine and second camera, both formulas equal picture brightness of aperture size is moderate；
84) picture that first camera and second camera are shot is read, the relative position at the center of first camera and scaling board is demarcated
With second camera and the relative position at the center of scaling board and recording nominal data；
85) display device to be measured of wearing is installed in wearing in the fixing device of display device calibration apparatus, and adjustment is worn display and set
Optical axis where the optical axis and first camera and second camera of two standby display modules is conllinear；
86) mainboard or control panel of display device in itself are worn by be measured, in two display moulds to be measured for wearing display device
The center of block is respectively produced can be in the first object lens and the second object lens after a cross picture, the optical system by wearing display device
Object plane produce the cross virtual image, after the first object lens and the second object lens, first camera and second camera photosurface distinguish
Produce cross picture；
87) according to nominal data and wear display device and calculated in the cross image position data of first camera and second camera
Wear the center displacement amount and optical axis deviation of display device.
9. a kind of method of testing for the test device for wearing display device as claimed in claim 6, it is characterised in that enter
One step includes the method that the optical-modulation transfer function of display device is worn in detection, and step is as follows：
71) interface of two cameras in image receiving system is connected with exchange interface with two netting twines, and will be schemed with netting twine
As the computer of processing system is connected with interchanger；
72) support is moved to setting position along guide rail direction, and the scaling board b for being printed on oblique quadrate array reference pattern is fixed on
On described support, adjustment support makes the centre-height between scaling board b centre-heights and two cameras consistent；
73) zoom ring of regulation first camera and second camera makes both focal lengths equal, and makes scaling board image entirely full of bat
The focusing ring of picture, regulation first camera and second camera is taken the photograph, the scaling board image clearly for photographing both adjusts the first phase
The aperture blades of machine and second camera, make the equal picture brightness of both aperture sizes moderate；
74) picture that first camera and second camera are shot is read, the modulation transmission at least one interest region in picture is calculated
Function mtf value, calculates modulation transfer function value and includes numerical value in display unit, adjustment focusing ring finds modulation in real time
The maximum position of transmission function, the modulating transfer function value of record now is the modulating transfer function value MTF of test system0；
If interest region has several, the modulation transfer function in all interest regions is recorded0(1)、MTF0(2)、…、MTF0(n) it is
The modulating transfer function value of test system；
75) by display device to be measured of wearing installed in wearing in the fixing device of display device calibration apparatus, display is worn in adjustment
Optical axis where the optical axis and first camera and second camera of two display modules of equipment is conllinear；
76) by display device mainboard in itself or the control panel to be measured worn in two display modules to be measured for wearing display device
Center respectively produce an oblique quadrate array test chart, by after the optical system to be measured for wearing display device understand in the first thing
Mirror and the second object lens object plane produce the virtual image, after the first object lens and the second object lens, in the photosensitive of first camera and second camera
Picture is produced on element respectively；
77) read the picture that first camera and second camera are shot, calculate step 74 in picture) selected by least one interest
The modulation transfer function value in region, calculates modulation transfer function value and includes numerical value in display unit, adjustment in real time
Focusing ring finds the maximum position of modulation transfer function, and the modulating transfer function value of record now is to wear display device and survey
The modulating transfer function value MTF of test system cascade1；If interest region has several, the modulation transmission in all interest regions is recorded
Function MTF1(1)、MTF1(2)、…、MTF1(n) modulating transfer function value cascaded for test system；
78) by test system modulating transfer function value MTF0With the MTF for wearing display device and system cascade1Value can be worn
The modulation transfer function of display device：MTF (n)=MTF1(n)/MTF0(n)。
10. a kind of method of testing for the test device for wearing display device as claimed in claim 6, it is characterised in that enter
One step includes the method that the eccentric position and off-axis size of display device are worn in detection, and step is as follows：
81) interface of two cameras in image receiving system is connected by two netting twines with exchange interface, and with netting twine by image
The computer of processing system is connected with interchanger；
82) support is moved to setting position along guide rail direction, and the scaling board a for being printed on grid reference pattern is fixed on described branch
On frame, adjustment support makes the centre-height between scaling board a centre-heights and two cameras consistent；
83) zoom ring of regulation first camera and second camera makes both focal lengths equal, and makes scaling board image entirely full of bat
The focusing ring of picture, regulation first camera and second camera is taken the photograph, the scaling board image clearly for photographing both adjusts the first phase
The aperture blades of machine and second camera, both formulas equal picture brightness of aperture size is moderate；
84) picture that first camera and second camera are shot is read, the relative position at the center of first camera and scaling board is demarcated
With second camera and the relative position at the center of scaling board and recording nominal data；
85) display device to be measured of wearing is installed in wearing in the fixing device of display device calibration apparatus, and adjustment is worn display and set
Optical axis where the optical axis and first camera and second camera of two standby display modules is conllinear；
86) mainboard or control panel of display device in itself are worn by be measured, in two display moulds to be measured for wearing display device
The center of block is respectively produced can be in the first object lens and the second object lens after a cross picture, the optical system by wearing display device
Object plane produce the cross virtual image, after the first object lens and the second object lens, first camera and second camera photosurface distinguish
Produce cross picture；
87) according to nominal data and wear display device and calculated in the cross image position data of first camera and second camera
Wear the center displacement amount and optical axis deviation of display device.
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