CN105530513A - Method for calibrating television display - Google Patents
Method for calibrating television display Download PDFInfo
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- CN105530513A CN105530513A CN201510900132.4A CN201510900132A CN105530513A CN 105530513 A CN105530513 A CN 105530513A CN 201510900132 A CN201510900132 A CN 201510900132A CN 105530513 A CN105530513 A CN 105530513A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
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Abstract
The invention discloses a method for calibrating a television display. The method comprises the following steps: a step 1), dividing a light receiving surface of the display into an array composed of a plurality of pixels, wherein the array covers and is arranged in an emergent light beam of a television signal light source; a step 2), counting photons received by each pixel on the light receiving surface, gradually changing the emergent energy of the signal light source at a certain voltage interval, and figuring out a function of the number of the photons accumulatively received by each pixel and the emergent energy; a step 3), extracting a characteristic value to be detected of an energy spectrum shape corresponding to each pixel via a recursive fitting method, and setting a unified reference energy spectrum; and a step 4), zooming and translating the energy spectrum to be detected to overlap the characteristic peak of the energy spectrum to be detected corresponding to each pixel with the corresponding characteristic peak of the reference energy spectrum. The calibration method disclosed by the invention can be used for ensuring uniform response of each pixel to the emergent photons having the same flux.
Description
Technical field
The present invention relates to a kind of calibration steps of display, particularly a kind of calibration steps of television display.
Background technology
In recent years, along with popularizing of television set, client more and more focuses on screen resolution and the imaging results of television set, and come on TV in market, the Showing Effectiveness On Screen of machine is uneven, often just be not passed to market through effective screen video picture calibration during product export to get on, reduce the consumption experience of client, cause bad evaluation to producer simultaneously.
At present, corresponding inconsistent to signal power of each pixel in the display of TV, cause the imaging results and the resolution that reduce display, reduce signal to noise ratio simultaneously, improve the amount of radiation of display, thus make the image fault showing screen display, for this reason, need a kind of calibration steps of display picture element badly, improve display screen to the display consistency of same signal source, thus improve the resolution of screen.
Summary of the invention
For above-mentioned technical problem, a kind of calibration steps of television display is proposed in the present invention, utilize characteristic image shape analysis and Gain tuning, convergent-divergent is carried out to the spectrum of all pixel responses, make the outgoing photo response of each pixel to same flux even.
A further object of the invention improves resolution and the imaging results of display.
In order to realize, according to these objects of the present invention and other advantage, providing a kind of calibration steps of television display,
Step 1) light receiving surface of display is divided into the array be made up of several pixels, described array covers and is arranged in the emergent beam of television signal light source, is connected by described array by reading circuit with display screen;
Step 2) photon that each pixel-by-pixel basis of described receiving plane receives is counted, the emanated energy of described signal optical source is changed gradually with certain voltage spaces, make each pixel to add up to receive number of photons to the function of described emanated energy, namely obtain the energy spectrogram to be checked that each pixel responds light source emergent ray;
Step 3) can the inspected feature value of spectral shape be extracted each pixel is corresponding by the method for recurrence matching, and set a unified benchmark energy spectrogram;
Step 4) according to the magnitude relationship of the described inspected feature value reference characteristic value corresponding with benchmark energy spectrogram regulate to be checked described in the horizontal scaling of the yield value of described reading circuit can spectrogram, the background noise simultaneously adjusting described receiving plane makes the translation of each pixel energy corresponding to be checked spectrogram, the characteristic peak of the energy spectrogram to be checked making each pixel corresponding overlaps with the individual features peak of benchmark energy spectrogram, thus makes the response between each pixel of display consistent.
Preferably, described display comprises display screen and detector, and described detector comprises described light receiving surface and reading circuit, and described reading circuit is connected with described light receiving surface and display screen simultaneously.
Preferably, described reading circuit comprises the charge amplifier, variable gain amplifier, comparator, the counter that connect successively, and the input of charge amplifier is connected with the signal output part of detector pixel, and the output of counter is connected with display screen.
Preferably, the threshold voltage of described comparator is directly proportional to the characteristic value size of described energy spectrogram to be checked, adjusts the threshold voltage of the corresponding comparator of each pixel, thus adjusts the size of each pixel energy corresponding to be checked spectrogram characteristic value.
Preferably, from 0V, the emanated energy of described signal optical source is increased gradually with the voltage spaces of 0.02V, read by counter the accumulative number of photons that each pixel-by-pixel basis receives simultaneously, make accumulative number of photons to the function of emanated energy change in voltage, obtain the energy spectrogram to be checked of pixel response, described energy spectrogram to be checked be Gaussian Profile.
Preferably, described step 3) in, described characteristic value comprises mean value and variance, is extracted mean value and the variance of energy spectrogram to be checked by the method for recurrence matching, described mean value be to be checked can magnitude of voltage corresponding to spectrogram peak position, can the offset parameter δ of spectrogram, it is relevant to background noise, and described variance is can the extensograph parameter S of spectrogram, it is proportional to the width of energy spectrogram, extensograph parameter s is larger, and energy spectrogram width is larger, and pixel resolution is higher.
Preferably, adjust the background noise that each pixel is corresponding, make magnitude of voltage corresponding to the characteristic value peak position of energy spectrogram to be checked move to the position consistent with benchmark energy spectrogram character pair value peak position.
Preferably, adjust the yield value of described variable gain amplifier according to the size of extensograph parameter S, can obtain scaling by spectrogram, make energy spectrogram consistent with the shape of benchmark energy spectrogram, final each pixel completes adjustment, and television display pixel alignment is complete.
Preferably, the adjustment of background noise, threshold voltage and yield value is synchronously carried out.
The present invention at least comprises following beneficial effect:
1, this calibration steps is applicable to the consistency of handled easily person to screen display when television set dispatches from the factory and keeps in repair and calibrates, and improves resolution and the imaging results of television screen;
2, adopt the novel response of power spectrum approximating method to detector different pixels to demarcate, effectively reduce error, improve fitting precision, shorten the alignment time.
Part is embodied by explanation below by other advantage of the present invention, target and feature, part also will by research and practice of the present invention by those skilled in the art is understood.
Accompanying drawing explanation
Fig. 1 is calibration schematic flow sheet.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to specification word to make those skilled in the art.
Should be appreciated that used hereinly such as " to have ", other element one or more do not allotted in " comprising " and " comprising " term or the existence of its combination or interpolation.
Have display and signal optical source generator in television set, display comprises display screen and detector, and described detector comprises described light receiving surface and reading circuit, and described reading circuit is connected with described light receiving surface and display screen simultaneously.
Step 1) light receiving surface of display is divided into the array be made up of several pixels, specifically can divide according to the size of display screen, such as 640x480, 1600x1200, 160 × 128, 1920x1080, 1280x720, the array etc. of 2560x1440 pixel composition, the receiving plane that described array is formed covers and is arranged in the emergent beam of television signal light source, ensure that exited signal light source just in time projects on receiving plane, described array is connected with display screen by reading circuit, that is the display that signal optical source produces by array is sent on display screen by reading circuit, display screen shows real-time pictures according to display,
Step 2) photon that each pixel-by-pixel basis of described receiving plane receives is counted, concrete, reading circuit comprises the charge amplifier connected successively, variable gain amplifier, comparator, counter, the input of charge amplifier is connected with the signal output part of detector pixel, the output of counter is connected with display screen, each pixel is counted by the counting channel that corresponding reading circuit is independent, the emanated energy of described signal optical source is changed gradually with certain voltage spaces, make each pixel to add up to receive number of photons to the function of described emanated energy, concrete, each emanated energy is to the accumulative number of photons that should have in each pixel certain hour, change emanated energy gradually, photon counting corresponding to each pixel also can change, then by can show after carrying software process each pixel to light source emergent ray respond to be checked can spectrogram, can spectrogram ordinate be accumulative number of photons, abscissa is emanated energy,
Concrete, from 0V, the emanated energy of described signal optical source is increased gradually with the voltage spaces of 0.02V, read by counter the accumulative number of photons that each pixel-by-pixel basis receives simultaneously, make accumulative number of photons to the function of emanated energy change in voltage, obtain the energy spectrogram to be checked of pixel response, described energy spectrogram to be checked be Gaussian Profile.
Step 3) to be checked can spectral shape be this feature of Gaussian Profile, extracted by the inspected feature value of method to each pixel corresponding energy spectral shape of recurrence matching, and set a unified benchmark energy spectrogram as calibration reference, because power spectrum is Gaussian Profile, main characteristic value comprises mean value and variance, mean value and the variance of energy spectrogram is extracted by the method for recurrence matching, mean value described in the present embodiment is can emanated energy corresponding to spectrogram peak position, can the offset parameter δ of spectrogram, it is relevant to background noise, described variance is the extensograph parameter S of energy spectrogram, it is proportional to the width of energy spectrogram, extensograph parameter S is larger, energy spectrogram width is larger, pixel resolution is higher,
Step 4) according to the magnitude relationship of the described inspected feature value reference characteristic value corresponding with benchmark energy spectrogram regulate to be checked described in the horizontal scaling of the yield value of described reading circuit can spectrogram, the background noise simultaneously adjusting described receiving plane makes the translation of each pixel energy corresponding to be checked spectrogram, the characteristic peak of the energy spectrogram to be checked making each pixel corresponding overlaps with the individual features peak of benchmark energy spectrogram, that is the background noise that each pixel is corresponding is adjusted, magnitude of voltage corresponding to the characteristic value peak position of energy spectrogram to be checked is made to move to the position consistent with benchmark energy spectrogram character pair value peak position, thus make the response between each pixel of display consistent.
Concrete, the difference of the extensograph parameter s obtained according to matching and offset parameter δ and benchmark energy spectral shape, the yield value of corresponding adjustment reading circuit makes each pixel corresponding energy spectrogram carry out scaling, when pixel to be calibrated corresponding energy spectrogram is narrow compared with benchmark energy spectrogram, size according to extensograph parameter S increases yield value, make that corresponding power spectrum is corresponding to broaden, when pixel to be calibrated corresponding energy spectrogram is wide compared with benchmark energy spectrogram, size according to extensograph parameter s reduces yield value, make that corresponding power spectrum is corresponding to narrow, adjust background noise simultaneously and make the translation of each pixel corresponding energy spectrogram, specifically, when comparatively benchmark energy spectrogram offsets toward abscissa augment direction pixel to be calibrated corresponding energy spectrogram, size according to offset parameter δ reduces background noise, make corresponding power spectrum reduce direction to abscissa to move, when comparatively benchmark energy spectrogram reduces direction skew toward abscissa to pixel to be calibrated corresponding energy spectrogram, size according to offset parameter δ increases background noise, corresponding power spectrum is moved to abscissa augment direction, the energy spectrogram finally making each pixel corresponding is consistent with benchmark energy spectrogram, thus make the response between each pixel of receiving plane consistent.
The threshold voltage of described comparator is directly proportional to the characteristic value size of described energy spectrogram to be checked, adjust the threshold voltage of the corresponding comparator of each pixel, thus adjust the size of each pixel energy corresponding to be checked spectrogram characteristic value, the namely height of peak position, adjustment threshold voltage makes each characteristic peak overlap completely with the characteristic peak of reference characteristic power spectrum, thus complete the calibration of each pixel, make the better to the corresponding consistency of light of receiving plane.
Adjust the yield value of described variable gain amplifier according to the size of extensograph parameter s, can obtain scaling by spectrogram, make energy spectrogram consistent with the shape of benchmark energy spectrogram, final each pixel completes adjustment, and television display pixel alignment is complete.
It is to be appreciated that in a calibration process, the adjustment of background noise, threshold voltage and yield value is synchronously carried out, thus accelerates regulated efficiency.
From the above mentioned, the calibration steps of television display of the present invention is applicable to the consistency of handled easily person to screen display when television set dispatches from the factory and keeps in repair and calibrates, and improves resolution and the imaging results of television screen; Meanwhile, adopt the novel response of power spectrum approximating method to detector different pixels to demarcate, effectively reduce error, improve fitting precision, shorten the alignment time.
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification and execution mode utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (9)
1. a calibration steps for television display, is characterized in that, comprises the following steps:
Step 1) light receiving surface of display is divided into the array be made up of several pixels, described array covers and is arranged in the emergent beam of television signal light source, is connected by described array by reading circuit with display screen;
Step 2) photon that each pixel-by-pixel basis of described receiving plane receives is counted, the emanated energy of described signal optical source is changed gradually with certain voltage spaces, make each pixel to add up to receive number of photons to the function of described emanated energy, namely obtain the energy spectrogram to be checked that each pixel responds light source emergent ray;
Step 3) can the inspected feature value of spectral shape be extracted each pixel is corresponding by the method for recurrence matching, and set a unified benchmark energy spectrogram;
Step 4) according to the magnitude relationship of the described inspected feature value reference characteristic value corresponding with benchmark energy spectrogram regulate to be checked described in the horizontal scaling of the yield value of described reading circuit can spectrogram, the background noise simultaneously adjusting described receiving plane makes the translation of each pixel energy corresponding to be checked spectrogram, the characteristic peak of the energy spectrogram to be checked making each pixel corresponding overlaps with the individual features peak of benchmark energy spectrogram, thus makes the response between each pixel of display consistent.
2. the calibration steps of television display as claimed in claim 1, it is characterized in that, described display comprises display screen and detector, and described detector comprises described light receiving surface and reading circuit, and described reading circuit is connected with described light receiving surface and display screen simultaneously.
3. the calibration steps of television display as claimed in claim 2, it is characterized in that, described reading circuit comprises the charge amplifier, variable gain amplifier, comparator, the counter that connect successively, the input of charge amplifier is connected with the signal output part of detector pixel, and the output of counter is connected with display screen.
4. the calibration steps of television display as claimed in claim 3, it is characterized in that, the threshold voltage of described comparator is directly proportional to the characteristic value size of described energy spectrogram to be checked, adjust the threshold voltage of the corresponding comparator of each pixel, thus adjust the size of each pixel energy corresponding to be checked spectrogram characteristic value.
5. the calibration steps of television display as claimed in claim 4, it is characterized in that, from 0V, the emanated energy of described signal optical source is increased gradually with the voltage spaces of 0.02V, read by counter the accumulative number of photons that each pixel-by-pixel basis receives simultaneously, make accumulative number of photons to the function of emanated energy change in voltage, obtain the energy spectrogram to be checked of pixel response, described energy spectrogram to be checked be Gaussian Profile.
6. the calibration steps of television display as claimed in claim 5, it is characterized in that, described step 3) in, described characteristic value comprises mean value and variance, mean value and the variance of energy spectrogram to be checked is extracted by the method for recurrence matching, described mean value be to be checked can magnitude of voltage corresponding to spectrogram peak position, can the offset parameter δ of spectrogram, it is relevant to background noise, described variance is the extensograph parameter S of energy spectrogram, and it is proportional to the width of energy spectrogram, and extensograph parameter S is larger, energy spectrogram width is larger, and pixel resolution is higher.
7. the calibration steps of television display as claimed in claim 6, it is characterized in that, adjust the background noise that each pixel is corresponding, make magnitude of voltage corresponding to the characteristic value peak position of energy spectrogram to be checked move to the position consistent with benchmark energy spectrogram character pair value peak position.
8. the calibration steps of television display as claimed in claim 7, it is characterized in that, the yield value of described variable gain amplifier is adjusted according to the size of extensograph parameter S, scaling can be obtained by spectrogram, make energy spectrogram consistent with the shape of benchmark energy spectrogram, final each pixel completes adjustment, and television display pixel alignment is complete.
9. the calibration steps of television display as claimed in claim 8, it is characterized in that, the adjustment of background noise, threshold voltage and yield value is synchronously carried out.
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| CN201510900132.4A CN105530513A (en) | 2015-12-08 | 2015-12-08 | Method for calibrating television display |
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| CN201510900132.4A CN105530513A (en) | 2015-12-08 | 2015-12-08 | Method for calibrating television display |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113508643A (en) * | 2019-03-01 | 2021-10-15 | 法雷奥照明公司 | Method for correcting a light pattern, automotive lighting device and automotive lighting assembly |
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| CN101014991A (en) * | 2004-06-29 | 2007-08-08 | 彩光公司 | System and method for a high-performance display device having individual pixel luminance sensing and control |
| WO2012142478A1 (en) * | 2011-04-15 | 2012-10-18 | Prysm, Inc. | Displays having built-in moiré reduction structures |
| CN104898159A (en) * | 2015-05-13 | 2015-09-09 | 中国科学院苏州生物医学工程技术研究所 | Calibration method of energy resolution CT detector |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101014991A (en) * | 2004-06-29 | 2007-08-08 | 彩光公司 | System and method for a high-performance display device having individual pixel luminance sensing and control |
| WO2012142478A1 (en) * | 2011-04-15 | 2012-10-18 | Prysm, Inc. | Displays having built-in moiré reduction structures |
| CN104898159A (en) * | 2015-05-13 | 2015-09-09 | 中国科学院苏州生物医学工程技术研究所 | Calibration method of energy resolution CT detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113508643A (en) * | 2019-03-01 | 2021-10-15 | 法雷奥照明公司 | Method for correcting a light pattern, automotive lighting device and automotive lighting assembly |
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Application publication date: 20160427 |