CN105023545B - Self image correcting device and method of liquid crystal display - Google Patents
Self image correcting device and method of liquid crystal display Download PDFInfo
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- CN105023545B CN105023545B CN201410447201.6A CN201410447201A CN105023545B CN 105023545 B CN105023545 B CN 105023545B CN 201410447201 A CN201410447201 A CN 201410447201A CN 105023545 B CN105023545 B CN 105023545B
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Abstract
The present invention provides a kind of self image correcting device and method of liquid crystal display, and the means for correcting comprises the following steps：Front OPTICAL SENSORS, correction reference unit, the front OPTICAL SENSORS are used to be corrected the shade of gray and colour temperature of the display, and the correction reference unit is used to correct front OPTICAL SENSORS in advance；The beneficial effects of the present invention are carrying out advance adjustment of image to the front OPTICAL SENSORS of installation when dispatching from the factory, and the front OPTICAL SENSORS of application correction Hou is directly adjusted to the shade of gray and colour temperature of display screen, and installation is simple, can effective detection correction display image.Human resources can be thereby saved, and overall maintenance, the engineering person of the manufacture can be shortened.
Description
Technical field
The present invention is espespecially related to a kind of self image school of liquid crystal display in belonging to display adjustment of image technical field
Equipment and method, and then human resources are saved, and overall maintenance, manufacturing engineering person can be shortened.
Background technology
Press, hardware correction can be divided into general display adjustment of image technical field, software corrects two classes, hardware correction
For adjusted data to be stored in the storage device of display interior, software, which is corrected to, utilizes color description shelves
(ICCProfile) purpose of adjustment of image is reached in system by the operation of computer.
Whether hardware or software correction all need to utilize external device (ED) such as computer, colorimeter etc. traditional display correction
Professional software required for equipment, and correction display, sets up above mentioned external device (ED) simultaneously under the occasion of part
Inconvenience, the display in the metope display such as buried, operating room.Especially it need to maintain to mark in frequent use and image
The high medical body of alignment request is in equipment, and external device (ED) and the software of specialty are also all one in maintenance cost
No small expense.
However, because each display pannel has narrow difference when making, even if there is any discrepancy for physical characteristic, present
High-high brightness is also inconsistent.It is more obvious by Gamma correction, the Hou luminance difference of color temperature compensating again.Especially frequency of use it is high and
It need to precisely show the medical bodies of form and aspect in more needing to maintain high standard a reference value to provide doctor's behaviours correct basis for estimation.
Prior art Taiwan Patent is disclosed in No. 200627369, also only provides a kind of method of adjustment photo dazzle color temperature, in
Carry out recording image etc. with the physical characteristics through electronic circuit.
[patent document 1] Taiwan Patent discloses No. 200627369
The content of the invention
Effectively to solve the above problems, the present invention is in using OPTICAL SENSORS and coordinating on display set sensing
Part, as long as having corrected OPTICAL SENSORS when dispatching from the factory, any external device (ED) and the display of software setting can not be needed to reach
The function of Independent self adjustment of image.Go for being inconvenient to set up the occasion of external device (ED) and reducing display correction
The cost of maintenance.
The main purpose of the present invention, in a kind of self image correcting method of liquid crystal display of offer, the bearing calibration
It is that the shade of gray and colour temperature of display are corrected by front OPTICAL SENSORS set on the display, the light sensation
Surveying device needs to correct in advance before application.With uniform reference value of safeguarding stability.
Further, methods described specifically includes following steps：(1) OPTICAL SENSORS in front of display is set up；(2) school is used
Positive reference unit verification front OPTICAL SENSORS；(3) front OPTICAL SENSORS is corrected to the gamma value and colour temperature of display.
The present invention also provides a kind of self image correcting device of liquid crystal display, and the means for correcting includes front light sensation
Device, correction reference unit are surveyed, before the front OPTICAL SENSORS is arranged on panel of LCD, the correction reference unit is set
In the centre position of liquid crystal display, the correction reference unit is connected to computer, the front light sensing with the display
Device is used to be corrected the shade of gray and colour temperature of the display, and the correction reference unit is used to enter front OPTICAL SENSORS
Row correction in advance.
The invention discloses beneficial effect：Advance adjustment of image is carried out to the OPTICAL SENSORS of installation when being to dispatch from the factory, and applied
OPTICAL SENSORS after correction is directly adjusted to the shade of gray and colour temperature of display screen, and installation is simple, and energy effective detection correction is aobvious
Show device image.
Brief description of the drawings
Fig. 1 OPTICAL SENSORSs in front of being corrected for the present invention correct schematic diagram；
Fig. 2 is in for OPTICAL SENSORS self-correction schematic diagram in front of the present invention.
Component name corresponding to each reference is in figure：
1 display
2 front OPTICAL SENSORSs
3 correction reference units
4 test pictures
Embodiment
The above-mentioned purpose and its structure of the present invention and characteristic functionally, will refer to accompanying drawing and specific implementation according to following
The present invention is further elaborated for method, refers to Fig. 1 and Fig. 2.
The present invention includes the flow chart and schematic flow sheet of following three steps.
First step：Set up OPTICAL SENSORS in front of display
Before front OPTICAL SENSORS 2 is arranged on into the panel of liquid crystal display 1, panel of LCD decline can be avoided to be led
The factors such as the brightness decay of cause, more accurate survey data can be obtained.
Second step：Verification front OPTICAL SENSORS, and implement following methods and obtain measurement Hou data, with correcting reference unit
Acquisition difference is compared, if difference is less than error range DeltaE (2000) ＜ 5, category corrects successfully.
First, colorimeter or spectrometer are set up in the appropriate location of display as correction reference unit 3；
2nd, display 1 and correction reference unit 3 are connected on computer；
3rd, the brightness adjustment of display 1 is to use range minimum, and shows completely black test pictures.Wait brightness stability
Hou, the measured value that now OPTICAL SENSORS 2 measures Red, Green, Blue triple channel areCorrect the institute of reference unit 3 simultaneously
The data such as chrominance space coordinate x, the y measured and brightness (lightness) Y is
4th, display 1 shows test pictures 4, and correction reference unit 3 measures chrominance space coordinate, and brightness (lightness)
Etc. data, and will measure obtain data storage, while front OPTICAL SENSORS measure Red, Green, Blue value and
ClearChannel (noiseless passage) data, and the data that the measurement is obtained stores；
It is rgb=(255 0 0) using test pictures, three rgb=(0 255 0), rgb=(0 0 255) test pictures
Face, the data corrected measured by reference unit is three groups of dataFront light sensing corresponding to it
Data measured by device is
5th, using chrominance space and psychrometric colour specification on equation, the wherein x in formula, y is chrominance space coordinate,
X, Y, Z are psychrometric colour specification：
Formula (one),
Will correction reference unit in Step 3: the data obtained measured by four is converted to psychrometric colour specification, four groups of colors can be obtained
Values
6th, establish front OPTICAL SENSORS measurement data and step 5 psychrometric colour specification between transition matrix and obtain turn
Matrix is changed in number, creates transfer equation：
Formula (two),
WhereinFor psychrometric colour specification,For the data of front OPTICAL SENSORS measurement.
The data that front OPTICAL SENSORS measures in above-mentioned steps three, four, five is measured and changed out with correction reference unit
Psychrometric colour specification bring into transfer equation, obtain transition matrix M.
Formula (three),
7th, display shows other test pictures, and front OPTICAL SENSORS measures, and obtains survey data and provides measurement
Material is converted to x through formula (four) and formula (two) and formula (one), and y, Y value, by x, it is poor that y, Y are obtained compared with correcting reference unit
It is different, if difference is less than error range, correct successfully.
Third step：Front OPTICAL SENSORS self-correction display
First, OPTICAL SENSORS measures the most dark brightness value L of display in front of useminAnd most bright brightness value Lmax, calculate
The reduced value C=L of displaymax/Lmin, to confirm that the reduced value of display meets DICOM specification.
2nd, gamma value is adjusted in the following manner
A. feedback control adjustment display backlight is carried out to appropriate brightness by front OPTICAL SENSORS, brightness has to greatly
The minimum brightness of specification in DICOM；
B. display gets 32 rank GTG test pictures, is measured and is recorded with as the bright of reference by front OPTICAL SENSORS
Degree, establish out the brightness curve of display；
C., will by cubic curve interpolation (cubicsplineinterpolation) according to the demand of display chip
Reference brightness carries out interpolation, obtains the brightness references table (luminancereferencetable) required for display chip, bright
The size for spending reference table is n；
D. the brightness value by target gamma value according to needed for gamma value formula (five) obtains each rank, and in brightness references table
Immediate corresponding exponent number is taken out, is inserted in gamma tables (GAMMAtable).
Formula (five), L (x ')=L0+(Ln-1-L0)×(x’/n)γ, x '=0,1...n-1
E. display firmware is loaded into the gamma tables that step d is adjusted out, and remeasures a gray scale curve and adjusted with verifying
Whether school result is correct, completes gamma value correction.
3rd, colour temperature is adjusted in the following manner
A. feedback control adjustment display backlight is carried out to appropriate brightness using front OPTICAL SENSORS, brightness has to greatly
The minimum brightness of specification in DICOM；
B. display shows complete white test pictures, and it is current that front OPTICAL SENSORS using transition matrix measures display
Chrominance space coordinate x, y and brightness (lightness) value, display R, G, B-Gain (red gain, green gain in buffer
And blue gain) value, wherein, the x in R-Gain color coordinates (x, y) corresponding with colour temperature is in direct ratio, and G-Gain is directly proportional to y
Example, B-Gain are inversely proportional with x, y.In addition, meet following formula between RGain, GGain and BGain and the brightness of display screen：Y=
0.299*RGain+0.587*GGain+0.114*BGain, therefore display R, G, B-Gain in buffer is adjusted to adjust
The colour temperature of display picture；
C. R, G, B-Gain value for adjusting Hou are loaded into by firmware and measurement confirms display chroma air coordinates again, with
And whether brightness (lightness) value is fallen into error permissible range, colour temperature adjustment is completed.
The present invention carries out advance adjustment of image to the front OPTICAL SENSORS of installation, and applies front OPTICAL SENSORS directly right
The shade of gray and colour temperature of display screen are adjusted, and installation is simple, can effective detection correction display image.
Examples detailed above is used for illustrating the present invention, rather than is limited.In the claims of the present invention
It is interior, it is any that modifications of the present invention is both fallen within protection scope of the present invention.
Claims (9)
- A kind of 1. self image correcting method of liquid crystal display, it is characterised in that the bearing calibration be rely on it is described Front OPTICAL SENSORS before display pannel is corrected to the shade of gray and colour temperature of display, and the front OPTICAL SENSORS is being answered With the correction in advance of preceding needs；Methods described specifically includes following steps：(1) OPTICAL SENSORS in front of display is set up：Before front OPTICAL SENSORS is arranged on into panel of LCD, liquid crystal is avoided Show the brightness decay caused by the decline of device panel；(2) using correction reference unit verification front OPTICAL SENSORS；(3) front OPTICAL SENSORS is corrected to the gamma value and colour temperature of display.
- 2. method according to claim 1, it is characterised in that the step (2) is further comprising the steps of：(21) correction reference unit is set up in front of the display；(22) display and correction reference unit are connected to computer；(23) display shows test pictures, and correction reference unit measurement chrominance space coordinate x, y and brightness value Y simultaneously passes through electricity Brain stores, and front OPTICAL SENSORS measures to display and stores survey data；(24) by the data of correction reference unit measurement in above-mentioned steps (23) substitute into chrominance space and psychrometric colour specification on side Psychrometric colour specification is obtained in formula；(25) between the psychrometric colour specification obtained in establishment step (23) in the data and step (24) of the measurement of front OPTICAL SENSORS Transition matrix, and transition matrix is obtained in number；(26) display shows other test pictures, and is measured by front OPTICAL SENSORS, obtains survey data and is converted to colourity sky Between coordinate and brightness value, with correction reference unit measurement obtain air coordinates and brightness value compared with, error be less than miss Poor scope DeltaE (2000) ＜ 5, verification are completed.
- 3. method according to claim 1, it is characterised in that the correction reference unit is colorimeter or spectrometer.
- 4. method according to claim 1, it is characterised in that correction of the front OPTICAL SENSORS to gamma value include with Lower step：(311) front OPTICAL SENSORS carry out feedback control adjustment display backlight so that brightness be more than DICOM in specification it is minimum Brightness；(312) display shows test pictures, and front OPTICAL SENSORS is measured and recorded using as reference brightness, while foundation Reference brightness establishes the brightness curve of display；(313) according to the requirement of display chip, interpolation is carried out to reference brightness, obtains the brightness ginseng required for display chip Table is examined, brightness references table size is n；(314) by target gamma value according to gamma value formula L (x ')=L0+(Ln-1-L0)×(x’/n)γ, x '=0,1...n-1 are asked Go out the brightness value needed for each rank, and immediate corresponding exponent number is taken out in brightness references table, inserted in gamma tables, wherein N represents brightness references table size, and x ' is exponent number；(315) display firmware is loaded into the gamma tables adjusted out in step (314), and remeasures a gray scale curve to test Whether card instruction result is correct, completes gamma value correction.
- 5. method according to claim 4, it is characterised in that also include before the step (311)：Light in front of use Sensor measures the most dark brightness value L of displayminAnd most bright brightness value Lmax, calculate the reduced value C=L of displaymax/ Lmin, to confirm that the reduced value of display meets DICOM specification.
- 6. method according to claim 4, it is characterised in that application cubic curve interpolation will in the step (313) Reference brightness carries out interpolation.
- 7. method according to claim 1, it is characterised in that correction of the front OPTICAL SENSORS to colour temperature includes following Step：(321) front OPTICAL SENSORS carry out feedback control adjustment display backlight so that brightness be more than DICOM in specification it is minimum Brightness；(322) display display test pictures, it is current that front OPTICAL SENSORS survey data simultaneously obtains display by transition matrix Chrominance space coordinate and brightness value, according to R, G, B-Gain value and chrominance space coordinate on adjusting in buffer Display R, G, B-Gain is to adjust the colour temperature of display picture；(323) by adjust Hou R, G, B-Gain value by firmware be loaded into and again measure confirmation display chroma air coordinates and Whether brightness value is fallen into error permissible range DeltaE (2000) ＜ 5, completes colour temperature adjustment.
- 8. a kind of self image correcting device of liquid crystal display, the means for correcting is using described in claim any one of 1-7 Method is corrected, and the means for correcting includes front OPTICAL SENSORS, correction reference unit, and the front OPTICAL SENSORS is arranged on Before panel of LCD, the correction reference unit is arranged on the centre position of liquid crystal display, the correction reference unit Be connected to computer with the display, it is characterised in that the front OPTICAL SENSORS be used for the shade of gray of the display and Colour temperature is corrected, and the correction reference unit is used to correct front OPTICAL SENSORS in advance.
- 9. means for correcting according to claim 8, it is characterised in that the correction reference unit is colorimeter or spectrum Instrument.
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| CN201410447201.6A CN105023545B (en) | 2014-04-18 | 2014-09-04 | Self image correcting device and method of liquid crystal display |
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| CN201410447201.6A CN105023545B (en) | 2014-04-18 | 2014-09-04 | Self image correcting device and method of liquid crystal display |
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| CN105023545B (en) * | 2014-04-18 | 2018-02-27 | 全方位数位影像开发股份有限公司 | Self image correcting device and method of liquid crystal display |
| CN106157904B (en) * | 2015-04-22 | 2018-07-03 | 深圳市巨烽显示科技有限公司 | Liquid crystal display and its display auto-correction method and device |
| US20160381253A1 (en) * | 2015-06-26 | 2016-12-29 | Mediatek Inc. | Image processor comprising local color processing circuits and associated image processing method for adjusting blue light strength of image |
| CN107146565A (en) * | 2017-04-26 | 2017-09-08 | 广州视源电子科技股份有限公司 | The method and device of gamma curve based on DICOM calibration curve displays |
| CN107884005B (en) * | 2017-10-20 | 2019-06-21 | 东南大学 | The optical measuring system and measurement method of a kind of simulation human eye focus ring border perception |
| CN108333801B (en) * | 2018-01-15 | 2021-09-10 | 武汉精测电子集团股份有限公司 | System and method for collecting chromatic value of liquid crystal module |
| CN108366474A (en) * | 2018-04-12 | 2018-08-03 | 宜春市同茂印务有限公司 | A kind of dynamic Light source correction device of ancient books calligraphy and painting scanning |
| CN108615511B (en) * | 2018-06-28 | 2020-09-01 | 深圳市华星光电技术有限公司 | Display method and display device |
| CN110070841B (en) * | 2019-03-26 | 2020-11-27 | 深圳市嘉利达专显科技有限公司 | Display screen adjusting method and device and electronic equipment |
| CN110706673B (en) * | 2019-07-26 | 2021-08-06 | 深圳市彤兴电子有限公司 | Display control method and device of display, electronic equipment and computer readable storage medium |
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| CN100351878C (en) * | 2001-04-27 | 2007-11-28 | 中华映管股份有限公司 | Compensation method for improving colour saturability and image quality of flat plasma display |
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