CN103501436B - Reproduction ratio method of testing and system thereof - Google Patents
Reproduction ratio method of testing and system thereof Download PDFInfo
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Abstract
The open a kind of reproduction ratio method of testing of the present invention and system thereof, this reproduction ratio method of testing comprises the following steps: test terminal sends information source switching command to display device to be tested；And/or send, to display device to be tested, the displaying ratio switching command that current information source is supported；And/or send, to signal generator, the video format switching command that current information source is supported；The signal generator multiple picture signals under display device input current video form successively；Color analyzer obtains the display device brightness value according to picture signal display image, and sends brightness value to test terminal；Test terminal is according to the brightness value received, the reproduction ratio corresponding when current information source, displaying ratio and video format to obtain display device.The reproduction ratio method of testing that the present embodiment proposes, measures display device reproduction ratio by brightness value, improves the testing efficiency of reproduction ratio, saved human cost simultaneously.
Description
Technical field
The present invention relates to image measurement technical field, particularly relate to a kind of reproduction ratio method of testing and system thereof.
Background technology
Huge numbers of families popularized by television set, and reproduction ratio is an important indicator of TV images test.Weight
Aobvious rate refers to the ratio of the image of the image programs that the image programs that television screen reappears sends with television station.
Television set just has the different reproduction of image at various information source, different video form and different ratio modes
Rate, is only shown to the image of spectators under suitable reproduction ratio and the most neither reveals that black surround is the most merciless cuts out portion
Partial image.The reproduction ratio of one television set of detection is the most up to standard, generally to expend a bit test engineer whole
The time of whole one day, utilize a kind of model that 22294(is graphics video signal generator) etc. signal occur
Device exports various video signals to television set, more manually switches information source, video format and display ratio one by one
Example pattern, is estimated the scale reading display image, thus draws reproduction ratio by human eye.Due to subjective because of
Element, occurs that different people has different judgement conclusions sometimes, and the display screen of a television set is from researching and developing to amount
It is the most up to standard that product generally to detect 10 times ability.
Summary of the invention
The main object of the present invention is to provide a kind of reproduction ratio method of testing and system thereof, it is intended to by automatically
Switching information source, displaying ratio and video format reach to improve reproduction ratio testing efficiency, to reduce manpower
This.
In order to achieve the above object, the present invention proposes a kind of reproduction ratio method of testing, comprises the following steps:
Test terminal sends information source switching command to display device to be tested；And/or to display to be tested
Equipment sends the displaying ratio switching command that current information source is supported；And/or send current to signal generator
The video format switching command that information source is supported；
Signal generator is cut according to described video format switching command or according to the test terminal described information source of transmission
The output image command sent when changing instruction or described displaying ratio switching command, defeated to display device successively
Enter the multiple picture signals under current video form；
After color analyzer receives the test instruction that test terminal sends, obtain display device according to described figure
The brightness value of image signal display image, and described brightness value is sent to described test terminal；
Test terminal according to the described brightness value received, with obtain display device presently described information source,
Reproduction ratio corresponding when displaying ratio and video format.
Preferably, described color analyzer, after receiving the test instruction that test terminal sends, obtains display
Equipment is according to the brightness value of described picture signal display image, and sends described brightness value to described test
The step of terminal specifically includes:
Signal generator when display device input is configured to the picture signal of the first color, color analyzer
Obtain the brightness value Y of the display device display image when input is configured to the picture signal of the first colorb；
Signal generator when display device input is configured to the picture signal of the second color, color analyzer
Obtain the brightness value Y of the display device display image when input is configured to the picture signal of the second colorw；
Signal generator is when display device input test picture signal, and color analyzer obtains display device
The brightness value Y of the display image when input test picture signalt。
Preferably, Y is worked asw>Yt>YbTime, described reproduction ratio Z is calculated by below equation:
Wherein, ZminFor the qualified reproduction ratio of minimum that test image is corresponding, K is coefficient；
Work as Yt≥YwTime, reproduction ratio Z is more than maximum qualified reproduction ratio；
Work as Yt≤YbTime, reproduction ratio Z is less than minimum qualified reproduction ratio.
Preferably, described color analyzer obtains display device according to the brightness shown by described picture signal
Value include obtaining the left hand edge median luminance value of the display screen of described display device, right hand edge median luminance value,
Top edge median luminance value and lower limb median luminance value.
The present invention the most also proposes a kind of reproduction ratio test system, including:
Test terminal, for sending information source switching command to display device to be tested；And/or to be tested
Display device send the displaying ratio switching command supported of current information source；And/or send out to signal generator
Send the video format switching command that current information source is supported；
Signal generator, for according to described video format switching command or according to test terminal transmission
The output image command sent when information source switching command or described displaying ratio switching command, successively to display
Multiple picture signals under equipment input current video form；
Color analyzer, for, after receiving the test instruction that test terminal sends, obtaining display device root
According to the brightness value of described picture signal display image, and described brightness value is sent to described test terminal；
Described test terminal, is additionally operable to according to the described brightness value that receives, is working as obtaining display device
Reproduction ratio corresponding when front described information source, displaying ratio and video format.
Preferably, described picture signal includes: is configured to the picture signal of the first color, is configured to second
The picture signal of color and be configured to the first color and add the test image signal of the second color.
Preferably, described color analyzer includes that the first acquisition module, the second acquisition module and the 3rd obtain
Delivery block, wherein,
Described first acquisition module, for being configured to the first color when signal generator to display device input
Picture signal time, obtain display device and show image when input is configured to the picture signal of the first color
Brightness value Yb；
Described second acquisition module, for being configured to the second color when signal generator to display device input
Picture signal time, obtain display device and show image when input is configured to the picture signal of the second color
Brightness value Yw；
Described 3rd acquisition module, is used for when signal generator is to display device input test picture signal,
Obtain display device and show the brightness value Y of image when input test picture signalt。
Preferably, Y is worked asw>Yt>YbTime, described reproduction ratio Z is calculated by below equation:
Wherein, ZminFor the qualified reproduction ratio of minimum that test image is corresponding, K is coefficient；
Work as Yt≥YwTime, reproduction ratio Z is more than maximum qualified reproduction ratio；
Work as Yt≤YbTime, reproduction ratio Z is less than minimum qualified reproduction ratio.
Preferably, described color analyzer includes four probes, and four described probes lay respectively at described aobvious
Show equipment display screen left hand edge in the middle of, in the middle of right hand edge, in the middle of top edge and in the middle of lower limb.
The reproduction ratio method of testing that the present embodiment proposes, is sent out to display device to be tested by test terminal
Deliver letters source switching command；And/or send, to display device to be tested, the displaying ratio that current information source is supported
Switching command；And/or send the video format switching command that current information source is supported, letter to signal generator
Number generator sends information source switching command or aobvious according to described video format switching command or according to test terminal
Show the output image command sent when proportion switch instructs, input current video form to display device successively
Under multiple picture signals, color analyzer receive test terminal send test instruction after, obtain display
Equipment is according to the brightness value of picture signal display image, and sends brightness value to test terminal, and test is eventually
End is according to the brightness value received, to obtain display device at current information source, displaying ratio and video lattice
Reproduction ratio corresponding during formula, has i.e. reached to be measured the purpose of display device reproduction ratio by brightness value, from
And avoid the reproduction ratio manually going to read display scale to obtain display device, save human cost.With
Time, read brightness value and there is with the method calculating reproduction ratio the advantage of the high easily detection of precision, overcome artificial
The coarse problem of measurement reading the subjective consciousness of scale and bring.It addition, this reproduction ratio method of testing,
By test terminal control, reach display device automatic switchover information source and displaying ratio and control signal
The purpose of generator automatic switchover video format, substantially increases the testing efficiency of reproduction ratio.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the preferred embodiment of reproduction ratio method of testing of the present invention；
Fig. 2 is the schematic flow sheet of step S30 shown in Fig. 1；
Fig. 3 is the schematic diagram of test image one embodiment of reproduction ratio method of testing of the present invention；
Fig. 4 is the signal of display device display image one embodiment using reproduction ratio method of testing of the present invention
Figure；
Fig. 5 is the structural representation of the preferred embodiment of reproduction ratio of the present invention test system；
Fig. 6 is the structural representation of color analyzer in reproduction ratio test system of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, do referring to the drawings further
Explanation.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment is described further with regard to technical scheme.Should
Understanding, specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The present invention proposes a kind of reproduction ratio method of testing.
Schematic flow sheet with reference to the preferred embodiment that Fig. 1, Fig. 1 are reproduction ratio method of testing of the present invention.
In this preferred embodiment, reproduction ratio method of testing comprises the following steps:
Step S10, test terminal sends information source switching command to display device to be tested；And/or to treating
The display device of test sends the displaying ratio switching command that current information source is supported；And/or occur to signal
Device sends the video format switching command that current information source is supported；
Specifically, in the present embodiment, display device can be to have image display merit with television set, computer etc.
The equipment of energy.Test terminal sends information source switching command by serial ports to display device.Test terminal is passed through
Serial ports sends Switch Video format order, the video that the output of control signal generator is corresponding to signal generator
Form and picture signal.When signal generator receives the Switch Video format order of test terminal, to display
Equipment sends the picture signal of correspondence.
Because of display device support plurality of information resources, meanwhile, display device support multiple displaying ratio, as full frame,
Standards etc., it addition, various video form supported by display device.Therefore, the representation of the display device of measurement
Rate is based on the reproduction ratio under a certain information source, a certain displaying ratio and a certain video format.Information source, aobvious
Show that when ratio, video format these three variable have one to change, the result of reproduction ratio is different from.
The all situations of three variablees need to all be switched and puts in place by test terminal.As information source has A1, A2 bis-
Kind, the displaying ratio that each information source is supported all has B1, B2 two kinds, the video lattice that each information source is supported
Formula all has C1, C2, C3 tri-kinds.Now, the combination of information source, displaying ratio and video format have with
Lower 12 kinds of situations: A1, B1, C1, A1, B1, C2, A1, B1, C3, A1, B2, C1,
A1, B2, C2, A1, B2, C3, A2, B1, C1, A2, B1, C2, A2, B1, C3,
A2, B2, C1, A2, B2, C2, A2, B2, C3.Test terminal controls display device and signal is sent out
Raw device, in the most changeable three variablees, it is possible to two in three variablees of switching every time, also
Three variablees can being switched simultaneously, putting in place as long as ensureing that all combinations of three variablees all switch, from
And get the reproduction ratio of the display device under all combinations of information source, displaying ratio and video format.
Step S20, signal generator sends letter according to described video format switching command or according to test terminal
The output image command sent when source switching command or displaying ratio switching command, defeated to display device successively
Enter the multiple picture signals under current video form；
Specifically, if test terminal controls display device switching information source, displaying ratio test terminal simultaneously
During control signal generator Switch Video form, signal generator refers to according to the video format switching received
The order multiple picture signals under display device input current video form successively.If test terminal controls
Display device switching information source and/or displaying ratio, and when video format keeps constant, test terminal sends letter
The output image command sent when source switching command and/or displaying ratio switching command is with control signal generator
Multiple picture signals under display device input current video form successively.If test terminal controls aobvious
Show the one in equipment switching information source or displaying ratio, meanwhile, control signal generator Switch Video form
Time, now, signal generator inputs to display device successively according to the video format switching command received
Multiple picture signals under current video form.
Specifically, in the present embodiment, picture signal includes: is configured to the picture signal of the first color, joins
It is set to the picture signal of the second color and is configured to the first color and adds the test image signal of the second color.
Step S30, color analyzer, after receiving the test instruction that test terminal sends, obtains display device
According to the brightness value of described picture signal display image, and described brightness value is sent to described test terminal；
In the present embodiment, multiple brightness values are passed through Serial Port Transmission to test terminal by color analyzer.Specifically
During enforcement, color analyzer can be CA210(be a kind of model of color analyzer) etc. color analysis
Instrument.
Step S40, test terminal is according to the described brightness value received, to obtain display device in current institute
State reproduction ratio corresponding when information source, displaying ratio and video format.
After obtaining multiple reproduction ratio that all information sources, displaying ratio and video format are corresponding, test is eventually
End generates reproduction ratio form, and prints reproduction ratio form.
Specifically, with reference to Fig. 2, step S30 specifically includes:
Step S31, signal generator is when display device input is configured to the picture signal of the first color, color
Colour analysis instrument obtains display device and shows the brightness of image when input is configured to the picture signal of the first color
Value Yb；
Step S32, signal generator is when display device input is configured to the picture signal of the second color, color
Colour analysis instrument obtains display device and shows the brightness of image when input is configured to the picture signal of the second color
Value Yw；
Step S33, signal generator is when display device input test picture signal, and color analyzer obtains
Display device shows the brightness value Y of image when input test picture signalt。
Test terminal control signal generator carries out the output switching between three kinds of picture signals.The present embodiment
In, with the first color as black, the second color is to illustrate as a example by white.With reference to Fig. 3, at test figure
In one specific embodiment of picture, a length of L1 of test image, width is L2, the middle part tool of test image
Having an a length of L3, width is the rectangular image area of L4.Rectangular image area is configured to black, square
Test image configurations beyond shape image-region is white.Rectangular image area accounts for whole test image-region
Area be the test minimum qualified reproduction ratio of image.For in principle, when input test picture signal
Brightness value Yt the biggest, illustrate that reproduction ratio Z is the biggest.
Such as YPbPr(color difference components interface) 720P signal, it is black field within 95%, i.e. middle square
It is 95% that shape image-region accounts for the area of whole test image-region, is white field in addition more than 95%.(YPbPr
The minimum qualified reproduction ratio of 720P signal is 95%, and maximum qualified reproduction ratio is 97%).If requiring weight
Aobvious rate is the information source of 100%, such as VGA(Video Graphics Array), minimum qualified reproduction ratio is 99.9%,
Now, test framing mask white line is internal is black field.
In the present embodiment, work as Yw>Yt>YbTime, reproduction ratio Z is calculated by below equation:
Wherein, ZminFor the qualified reproduction ratio of minimum that test image is corresponding, K is coefficient.K is by reality
Calculate.Concrete K calculates by the following method: under a certain information source and displaying ratio, to television set
Inputting the picture signal of a kind of video format, artificial reading reproduction ratio Z, further according to known Yt、YbAnd Zmin
Substitute into above-mentioned formula (1) and COEFFICIENT K can be obtained.It is to say, during test for the first time, need to first calculate
Going out K, then, test terminal is further according to the K tried to achieve, by above-mentioned public affairs in automatic testing process afterwards
Formula (1) calculates and obtains in television set reproduction ratio Z under a certain information source, displaying ratio and video format.
Work as Yt≥YwTime, reproduction ratio Z is more than maximum qualified reproduction ratio.
Work as Yt≤YbTime, reproduction ratio Z is less than minimum qualified reproduction ratio.
For the information source requiring reproduction ratio to be 100%, work as Yt>YbTime, reproduction ratio Z is 100%；Work as Yt≤Yb
Time, reproduction ratio Z is defective.
Further, with reference to Fig. 4, described color analyzer obtains the brightness value bag of display device display image
Include the left hand edge median luminance value of the display screen obtaining described display device, right hand edge median luminance value, on
Edge median luminance value and lower limb median luminance value.
Specifically, in the present embodiment, four probes can be set in color analyzer, be respectively arranged in
At C, D, E, F of Fig. 4.The reproduction ratio of four positions of one-shot measurement display device.Deform at other
In embodiment, it is possible to a probe is set, measures the reproduction ratio at C, D, E, F of Fig. 4 successively.
Be installed on the probe at C, D for measuring horizontal reproduction ratio, be installed on probe at E, F for
Measure vertical reproduction ratio.When measuring the horizontal reproduction ratio that the horizontal reproduction ratio at C is more than at D, explanation
The image of display device actual displayed is to the right, otherwise the most to the left.When measuring the vertical reproduction ratio at E more than F
During the vertical reproduction ratio located, illustrate that the image of display device actual displayed is on the upper side, on the contrary the most on the lower side.Now,
Image shift can be sent by test terminal to display device accordingly to instruct, to display device display image
Position is adjusted.
The reproduction ratio method of testing that the present embodiment proposes, is sent out to display device to be tested by test terminal
Deliver letters source switching command；And/or send, to display device to be tested, the displaying ratio that current information source is supported
Switching command；And/or send the video format switching command that current information source is supported, letter to signal generator
Number generator sends information source switching command or aobvious according to described video format switching command or according to test terminal
Show the output image command sent when proportion switch instructs, input current video form to display device successively
Under multiple picture signals, color analyzer, after receiving the test instruction that test terminal sends, obtains aobvious
Show the equipment brightness value according to picture signal display image, and brightness value is sent to test terminal, test
Terminal is according to the brightness value received, to obtain display device at current information source, displaying ratio and video
Reproduction ratio corresponding during form, has i.e. reached to be measured the purpose of display device reproduction ratio by brightness value,
Thus avoid the reproduction ratio manually going to read display scale to obtain display device, save human cost.
Meanwhile, read brightness value and there is with the method calculating reproduction ratio the advantage of the high easily detection of precision, overcome people
Part work and part study takes the subjective consciousness of scale and the coarse problem of measurement brought.It addition, this reproduction ratio test side
Method, by test terminal control, reaches display device automatic switchover information source and displaying ratio and controls
The purpose of signal generator automatic switchover video format, substantially increases the testing efficiency of reproduction ratio.
Present invention further propose that a kind of reproduction ratio test system.
Structural representation with reference to the preferred embodiment that Fig. 5, Fig. 5 are reproduction ratio of the present invention test system.
In this preferred embodiment, reproduction ratio test system includes:
Test terminal 10, for sending information source switching command to display device to be tested；And/or to be measured
The display device of examination sends the displaying ratio switching command that current information source is supported；And/or to signal generator
Send the video format switching command that current information source is supported；
Signal generator 20, for according to described video format switching command or according to test terminal transmission letter
The output image command sent when source switching command or displaying ratio switching command, defeated to display device successively
Enter the multiple picture signals under current video form；
Color analyzer 30, for, after receiving the test instruction that test terminal sends, obtaining display device
According to the brightness value of described picture signal display image, and described brightness value is sent to described test terminal；
Test terminal 10, is additionally operable to according to the described brightness value received, to obtain display device currently
Reproduction ratio corresponding when described information source, displaying ratio and video format.
Specifically, in the present embodiment, display device 40 can be to have image with television set, computer etc. to show
The equipment of function.Test terminal 10 sends information source switching command by serial ports to display device 40.
Because plurality of information resources supported by display device 40, meanwhile, multiple displaying ratio supported by display device 40,
Such as full frame, standard etc., it addition, various video form supported by display device 40.Therefore, the display of measurement
The reproduction ratio of equipment 40 is based on the representation under a certain information source, a certain displaying ratio and a certain video format
Rate.When information source, displaying ratio, video format these three variable have one to change, the result of reproduction ratio is all
Differ.
Specifically, if test terminal controls display device switching information source and displaying ratio, test end simultaneously
During end control signal generator Switch Video form, signal generator is according to the video format switching received
The instruction multiple picture signals under display device input current video form successively.If test terminal is controlled
Display device processed switching information source and/or displaying ratio, and when video format keeps constant, test terminal sends
The output image command sent when information source switching command and/or displaying ratio switching command occurs with control signal
The device multiple picture signals under display device input current video form successively.If test terminal controls
One in display device switching information source or displaying ratio, meanwhile, control signal generator Switch Video lattice
During formula, now, signal generator is defeated to display device successively according to the video format switching command received
Enter the multiple picture signals under current video form.
In the present embodiment, multiple brightness values are passed through Serial Port Transmission to test terminal 10 by color analyzer 30.
When being embodied as, color analyzer 30 can be the color analyzers such as CA210.Test terminal 10 is passed through
Serial ports sends Switch Video format order to signal generator 20, and control signal generator 20 exports correspondence
Video format and picture signal.Signal generator 20 receives the Switch Video form of test terminal 10 and refers to
When making, send video format and the picture signal of correspondence to display device 40.
In the present embodiment, with the first color as black, the second color is to illustrate as a example by white.Rectangle
Image-region is configured to black, and the test image configurations beyond rectangular image area is white.Rectangular image
Region accounts for the area of whole test image-region and is the minimum qualified reproduction ratio of test image.For in principle,
Brightness value Yt when input test picture signal is the biggest, illustrates that reproduction ratio Z is the biggest.
Such as YPbPr720P signal, is black field within 95%, and i.e. middle rectangular image area accounts for whole
The area of test image-region is 95%, is white field in addition more than 95%.(YPbPr720P signal minimum is closed
Lattice reproduction ratio is 95%, and maximum qualified reproduction ratio is 97%).If the letter requiring reproduction ratio to be 100%
Source, such as VGA, minimum qualified reproduction ratio is 99.9%, and now, test image is in frame is white line
Portion is black field.
Specifically, with reference to Fig. 6, color analyzer 30 includes first acquisition module the 31, second acquisition module
32 and the 3rd acquisition module 33, wherein,
First acquisition module 31, for being configured to first when signal generator 20 to display device 40 input
During the picture signal of color, obtain display device 40 aobvious when input is configured to the picture signal of the first color
The brightness value Yb of diagram picture；
Second acquisition module 32, for being configured to second when signal generator 20 to display device 40 input
During the picture signal of color, obtain display device 40 aobvious when input is configured to the picture signal of the second color
The brightness value Y of diagram picturew；
3rd acquisition module 33, for believing to display device 40 input test image when signal generator 20
Number time, obtain display device 40 and show the brightness value Y of image when input test picture signalt。
In the present embodiment, work as Yw>Yt>YbTime, reproduction ratio Z is calculated by below equation:
Wherein, ZminFor the qualified reproduction ratio of minimum that test image is corresponding, K is coefficient.K is by reality
Calculate.Concrete K calculates by the following method: under a certain information source and displaying ratio, to television set
Inputting the picture signal of a kind of video format, artificial reading reproduction ratio Z, further according to known Yt、YbAnd Zmin
Substitute into above-mentioned formula (1) and COEFFICIENT K can be obtained.It is to say, during test for the first time, need to first calculate
Going out K, then, test terminal is further according to the K tried to achieve, by above-mentioned public affairs in automatic testing process afterwards
Formula (1) calculates and obtains in television set reproduction ratio Z under a certain information source, displaying ratio and video format.
Work as Yt≥YwTime, reproduction ratio Z is more than maximum qualified reproduction ratio.
Work as Yt≤YbTime, reproduction ratio Z is less than minimum qualified reproduction ratio.
For the information source requiring reproduction ratio to be 100%, work as Yt>YbTime, reproduction ratio Z is 100%；Work as Yt≤Yb
Time, reproduction ratio Z is defective.
In the present embodiment, shown in Fig. 4 and Fig. 5, color analyzer 30 includes four probes 34, visits
34 employing side's pyramidal shape, four probes 34 lay respectively at the left hand edge of the display screens of display device 40
In the middle of centre, right hand edge, in the middle of top edge and in the middle of lower limb.In the present embodiment, four spies are set
34 can realize the reproduction ratio on 40 4 positions of one-shot measurement display device.In other variant embodiment
In, it is possible to a probe 34 is set, measures the reproduction ratio at C, D, E, F of Fig. 4 successively.
It is installed on the probe 34 at C, D for measuring horizontal reproduction ratio, is installed on the probe at E, F
34 are used for measuring vertical reproduction ratio.When measuring the horizontal reproduction ratio that the horizontal reproduction ratio at C is more than at D,
Illustrate that the image of display device 40 actual displayed is to the right, on the contrary the most to the left.When measuring the vertical representation at E
When rate is more than the vertical reproduction ratio at F, illustrate that the image of display device 40 actual displayed is on the upper side, otherwise then
On the lower side.Now, image shift can be sent by test terminal 10 to display device 40 to instruct, to display
Equipment 40 shows that the position of image is adjusted.
The reproduction ratio test system that the present embodiment proposes, by test terminal 10 for display to be tested
Equipment 40 sends information source switching command；And/or send current information source to display device 40 to be tested and propped up
The displaying ratio switching command held；And/or send, to signal generator 20, the video lattice that current information source is supported
Formula switching command, signal generator 20 successively to display device 40 input under current video form multiple
Picture signal, color analyzer 30 obtains display device 40 according to the brightness value shown by picture signal,
And brightness value is sent to test terminal 10, test terminal 10 is according to the brightness value received, aobvious to obtain
Show the reproduction ratio that equipment 40 is corresponding when current information source, displaying ratio and video format, i.e. reached logical
Cross brightness value to measure the purpose of the reproduction ratio of display device 40, because of avoid manually going reading display scale with
Obtain the reproduction ratio of display device 40, thus save human cost.Meanwhile, brightness value is read to calculate
The method precision of reproduction ratio is high, overcomes people's subjective consciousness and the coarse problem of measurement brought.It addition,
This reproduction ratio test system, is controlled by test terminal 10, reaches display device 40 and automatically switch information source
And displaying ratio, and control signal generator 20 automatically switches the purpose of video format, substantially increases
The measurement efficiency of reproduction ratio.
The foregoing is only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention,
Every equivalent structure transformation utilizing description of the invention and accompanying drawing content to be made, or directly or indirectly use
In the technical field that other are relevant, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (4)
1. a reproduction ratio method of testing, it is characterised in that comprise the following steps:
Test terminal sends information source switching command to display device to be tested；And/or to display to be tested
Equipment sends the displaying ratio switching command that current information source is supported；And/or send current to signal generator
The video format switching command that information source is supported；
Signal generator is cut according to described video format switching command or according to the test terminal described information source of transmission
The output image command sent when changing instruction or described displaying ratio switching command, defeated to display device successively
Enter the multiple picture signals under current video form；
Color analyzer, after receiving the test instruction that test terminal sends, obtains display device according to described
The brightness value of picture signal display image, and described brightness value is sent to described test terminal；
Test terminal according to the described brightness value received, with obtain display device presently described information source,
Reproduction ratio corresponding when displaying ratio and video format；
Wherein, if signal generator inputs picture signal and the color analyzer inspection of the first color to display
Measuring the image brightness values corresponding to the picture signal of this first color is Yb, signal generator is to display
Input the picture signal of the second color and color analyzer detects corresponding to the picture signal of this second color
Image brightness values be Yw, signal generator inputs the first color to display and adds the test figure of the second color
Image signal and color analyzer detect that the image brightness values corresponding to this test image signal is Yt, then when
Yw>Yt>YbTime, reproduction ratio Z is calculated by below equation:
Wherein, ZminFor the qualified reproduction ratio of minimum that test image is corresponding, K is coefficient and passes through above public
Formula carries out actual measuring and calculation and obtains；
Work as Yt≥YwTime, reproduction ratio Z is more than maximum qualified reproduction ratio；
Work as Yt≤YbTime, reproduction ratio Z is less than minimum qualified reproduction ratio.
2. reproduction ratio method of testing as claimed in claim 1, it is characterised in that described color analyzer
Obtain display device and include that obtaining described display sets according to the brightness value of the image shown by described picture signal
The left hand edge median luminance value of standby display screen, right hand edge median luminance value, top edge median luminance value with
And lower limb median luminance value.
3. a reproduction ratio test system, it is characterised in that including:
Test terminal, for sending information source switching command to display device to be tested；And/or to be tested
Display device send the displaying ratio switching command supported of current information source；And/or send out to signal generator
Send the video format switching command that current information source is supported；
Signal generator, for according to described video format switching command or according to test terminal transmission
The output image command sent when information source switching command or described displaying ratio switching command, successively to display
Multiple picture signals under equipment input current video form；
Color analyzer, for, after receiving the test instruction that test terminal sends, obtaining display device root
According to the brightness value of described picture signal display image, and described brightness value is sent to described test terminal；
Described test terminal, is additionally operable to according to the described brightness value that receives, is working as obtaining display device
Reproduction ratio corresponding when front described information source, displaying ratio and video format；
Wherein, if signal generator inputs picture signal and the color analyzer inspection of the first color to display
Measuring the image brightness values corresponding to the picture signal of this first color is Yb, signal generator is to display
Input the picture signal of the second color and color analyzer detects corresponding to the picture signal of this second color
Image brightness values be Yw, signal generator inputs the first color to display and adds the test figure of the second color
Image signal and color analyzer detect that the image brightness values corresponding to this test image signal is Yt, then when
Yw>Yt>YbTime, reproduction ratio Z is calculated by below equation:
Wherein, ZminFor the qualified reproduction ratio of minimum that test image is corresponding, K is coefficient and passes through above public
Formula carries out actual measuring and calculation and obtains；
Work as Yt≥YwTime, reproduction ratio Z is more than maximum qualified reproduction ratio；
Work as Yt≤YbTime, reproduction ratio Z is less than minimum qualified reproduction ratio.
4. reproduction ratio test system as claimed in claim 3, it is characterised in that described color analyzer
Including four probes, in the middle of the left hand edge of the display screen that four described probes lay respectively at described display device,
In the middle of right hand edge, in the middle of top edge and in the middle of lower limb.
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| CN109951699B (en) * | 2017-12-21 | 2021-06-11 | 深圳Tcl新技术有限公司 | Method and device for testing television display scale and storage medium |
| CN109218715A (en) * | 2018-10-18 | 2019-01-15 | 深圳Tcl新技术有限公司 | Automatic adjusting method, system and the storage medium of image |
| CN110602490B (en) * | 2019-08-30 | 2021-11-23 | 深圳Tcl新技术有限公司 | Method and device for automatically testing reproduction rate and readable storage medium |
| CN112822485A (en) * | 2019-11-18 | 2021-05-18 | 青岛海尔多媒体有限公司 | Reproduction rate debugging method and device and display equipment |
| CN113613037A (en) * | 2021-07-09 | 2021-11-05 | 深圳市捷视飞通科技股份有限公司 | Video processing method, system and device |
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