CN109712579A - A kind of calibration method and device of brightness measurement - Google Patents
A kind of calibration method and device of brightness measurement Download PDFInfo
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Abstract
The present invention relates to computer field, in particular to the calibration method and device of a kind of brightness measurement, to reduce measurement error.This method are as follows: using specified grayscale, after screen edge region acquires corresponding edge brightness measuring signal by luminance sensor, using preset luminance errors mapping relations, the corresponding edge brightness value of the edge brightness measuring signal is calibrated, obtain corresponding center brightness value, wherein, the luminance errors mapping relations have recorded under each grayscale of setting, the corresponding relationship between the brightness value in screen edge region and the brightness value in screen center region；In this way, the any position that luminance sensor can be mounted on to screen edge region carries out the measurement of edge brightness value, after calibration, get the center brightness value in accurate screen center region, so as to avoid because liquid crystal display technique limitation due to caused by measurement result inaccuracy problem, calibration accuracy is effectively increased, measurement error is reduced, and then ensure that medical display is able to use most accurate most stable of parameter work.
Description
Technical field
The present invention relates to computer field, in particular to the calibration method and device of a kind of brightness measurement.
Background technique
In medical field, it is desirable that the display brightness of the display of Medical Instruments is accurate and steady in a long-term, and characterizes aobvious
Show that the intensity gray scale curve of device performance will meet digital imaging and communications in medicine (Digital Imaging and
Communications in Medicine, DICOM) curve requirement, and the display performance of display is timed
Detection and calibration, to guarantee that display performance meets the display of medical picture for a long time and diagnosis requires.
Under prior art, when the display performance to display is timed detection and calibration, usually by being embedded in
The luminance sensor of the screen edge of display detects the intensity gray scale curve of display.But since the screen of display is adopted
It is manufactured with liquid crystal process, and the gap of the liquid crystal of the gap of the liquid crystal of screen edge region encapsulation and the encapsulation of screen center region
Difference, thus can cause screen edge region light penetration power and screen center region light penetration power it is variant, in turn
Cause the luminance difference in screen edge region and screen center region；Further, it is sealed due to screen edge using frame glue
Dress, therefore the electric field controls in screen edge region and the electric field controls in screen center region can be caused different, thus further
Cause the luminance difference in screen edge region and screen center region.In view of this, needing with the brightness value in screen center region
For target, the brightness value using the luminance sensor acquisition for being installed on shielding edge is calibrated.
Under prior art, display can carry out school to the brightness value that luminance sensor acquires using preset linear formula
It is quasi-.Specifically, when display is using the luminance sensor acquisition brightness value for being installed on screen edge region, it usually needs be based on
Preset grayscale set acquires the brightness value in the screen edge region under each grayscale respectively, then is based on the preset line
Property formula, calibrates the brightness value in the screen edge region under each grayscale, obtains the screen center under corresponding grayscale
The brightness value in region.
However, being not between the brightness value in screen edge region and the brightness value in screen center region in practical application
Therefore simple linear relationship is carried out using brightness value of the preset linear formula to the screen edge region under various grayscale
Calibration, often it is difficult to ensure that a series of accuracy of the brightness value in the screen center regions obtained, measurement error are larger, it is difficult to
Guarantee calibration effect.
Summary of the invention
The embodiment of the present invention provides the calibration method and device of a kind of brightness measurement, to improve calibration accuracy, reduces
Measurement error.
Specific technical solution provided in an embodiment of the present invention is as follows:
A kind of calibration method of brightness measurement, comprising:
Using specified grayscale, corresponding edge brightness measuring signal is acquired by luminance sensor in screen edge region；
The edge brightness measuring signal is converted into corresponding edge brightness value, and is reflected based on preset luminance errors
Relationship is penetrated, the edge brightness value is calibrated, obtains corresponding center brightness value；Wherein, the luminance errors mapping is closed
System has recorded under each grayscale of setting, between the brightness value in screen edge region and the brightness value in screen center region
Corresponding relationship.
Optionally, the luminance errors mapping relations are set, are specifically included:
Shielded based on preset second measurement grayscale set using each grayscale in the second measurement grayscale set
Curtain fringe region acquires corresponding third brightness measurement signal set by luminance sensor；
Based on the second measurement grayscale set, using each grayscale in the second measurement grayscale set, in screen
Central area acquires corresponding 4th brightness measurement signal set by normal brightness instrument；
Third measuring signal set is converted into corresponding third brightness value set, and by the 4th measuring signal set
Be converted to corresponding 4th brightness value set, and respectively for it is described second measurement grayscale set in each grayscale execute with
Lower operation: a kind of grayscale corresponding brightness value in third brightness value set is recorded, records a kind of grayscale in the 4th brightness
A kind of corresponding brightness value in value set, corresponding grayscale, records the difference of two kinds of brightness values of acquisition；
It will summarize for the information of various grayscale records in the second measurement grayscale set, mapped as luminance errors
Relationship.
Optionally, after obtaining the edge brightness measured value, before being calibrated to corresponding edge brightness value,
Further comprise:
Based on preset brightness calibration function, the edge brightness measuring signal is calibrated, the brightness calibration letter
Number characterizes the measurement result difference between the luminance sensor and normal brightness instrument.
Optionally, the brightness calibration function is set, is specifically included:
Shielded based on preset first measurement grayscale set using each grayscale in the first measurement grayscale set
Curtain central area acquires corresponding first brightness measurement signal set by luminance sensor；
Based on the first measurement grayscale set, using each grayscale in the first measurement grayscale set, in screen
Central area acquires corresponding second brightness measurement signal set by normal brightness instrument；
The of the first brightness measurement signal set and normal brightness instrument acquisition based on luminance sensor acquisition
Two brightness measurement signal sets calculate the brightness calibration function of the luminance sensor.
Optionally, after obtaining the first brightness measurement signal set, in the brightness school for calculating the luminance sensor
Before quasi-function, further comprise:
Determine the electronics bias of the luminance sensor；
The the first brightness measurement signal set acquired by the luminance sensor is carried out using the electronics bias
Adjustment.
A kind of display, including processor and luminance sensor, wherein
The processor is used for:
Using specified grayscale, corresponding edge brightness measuring signal is acquired by luminance sensor in screen edge region；
The edge brightness measuring signal is converted into corresponding edge brightness value, and is reflected based on preset luminance errors
Relationship is penetrated, the edge brightness value is calibrated, obtains corresponding center brightness value；Wherein, the luminance errors mapping is closed
System has recorded under each grayscale of setting, between the brightness value in screen edge region and the brightness value in screen center region
Corresponding relationship.
Optionally, when the luminance errors mapping relations are arranged, the processor is specifically used for:
Shielded based on preset second measurement grayscale set using each grayscale in the second measurement grayscale set
Curtain fringe region acquires corresponding third brightness measurement signal set by luminance sensor；
Based on the second measurement grayscale set, using each grayscale in the second measurement grayscale set, in screen
Central area acquires corresponding 4th brightness measurement signal set by normal brightness instrument；
Third measuring signal set is converted into corresponding third brightness value set, and by the 4th measuring signal set
Be converted to corresponding 4th brightness value set, and respectively for it is described second measurement grayscale set in each grayscale execute with
Lower operation: a kind of grayscale corresponding brightness value in third brightness value set is recorded, records a kind of grayscale in the 4th brightness
A kind of corresponding brightness value in value set, corresponding grayscale, records the difference of two kinds of brightness values of acquisition；
It will summarize for the information of various grayscale records in the second measurement grayscale set, mapped as luminance errors
Relationship.
Optionally, after obtaining the edge brightness measured value, before being calibrated to corresponding edge brightness value,
The processor is further used for:
Based on preset brightness calibration function, the edge brightness measuring signal is calibrated, the brightness calibration letter
Number characterizes the measurement result difference between the luminance sensor and normal brightness instrument.
Optionally, when the brightness calibration function is arranged, the processor is specifically used for:
Shielded based on preset first measurement grayscale set using each grayscale in the first measurement grayscale set
Curtain central area acquires corresponding first brightness measurement signal set by luminance sensor；
Based on the first measurement grayscale set, using each grayscale in the first measurement grayscale set, in screen
Central area acquires corresponding second brightness measurement signal set by normal brightness instrument；
The of the first brightness measurement signal set and normal brightness instrument acquisition based on luminance sensor acquisition
Two brightness measurement signal sets calculate the brightness verification function of the luminance sensor.
Optionally, after obtaining the first brightness measurement signal set, in the brightness school for calculating the luminance sensor
It tests before function, the processor is further used for:
Determine the electronics bias of the luminance sensor；
The the first brightness measurement signal set acquired by the luminance sensor is carried out using the electronics bias
Adjustment.
A kind of storage medium is stored with the program of the calibration method for realizing brightness measurement, and described program is by processor
When operation, following steps are executed:
Using specified grayscale, corresponding edge brightness measuring signal is acquired by luminance sensor in screen edge region；
The edge brightness measuring signal is converted into corresponding edge brightness value, and is reflected based on preset luminance errors
Relationship is penetrated, the edge brightness value is calibrated, obtains corresponding center brightness value；Wherein, the luminance errors mapping is closed
System has recorded under each grayscale of setting, between the brightness value in screen edge region and the brightness value in screen center region
Corresponding relationship.
In the embodiment of the present invention, using specified grayscale, corresponding side is acquired by luminance sensor in screen edge region
After edge brightness measurement signal, using preset luminance errors mapping relations, edge corresponding to the edge brightness measuring signal
Brightness value is calibrated, and corresponding center brightness value is obtained, wherein the luminance errors mapping relations have recorded the every of setting
Under a kind of grayscale, the corresponding relationship between the brightness value in screen edge region and the brightness value in screen center region；In this way, can
The measurement of edge brightness value is carried out so that luminance sensor to be mounted on to any position in screen edge region, after calibration, is obtained
Get the center brightness value in accurate screen center region, so as to avoid because liquid crystal display technique limitation due to caused by measure knot
The problem of fruit inaccuracy, effectively increases calibration accuracy, reduces measurement error, and then ensure that medical display can
It is worked using most accurate most stable of parameter.
Detailed description of the invention
Fig. 1 is that brightness verification function flow chart is arranged in display in the embodiment of the present invention；
Fig. 2 is that luminance errors mapping relations flow chart is arranged in display in the embodiment of the present invention；
Fig. 3 is luminance errors mapping relations schematic diagram in the embodiment of the present invention；
Fig. 4 is that display carries out brightness measurement and calibration flow chart in the embodiment of the present invention；
Fig. 5 is display function structural schematic diagram in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, is not whole embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
In the embodiment of the present invention, the calibration of brightness measurement can be realized by the processing module that display interior is arranged,
Certainly, above-mentioned processing module is also possible to the self-contained unit except display, and the embodiment of the present invention is only arranged with processing module
It is introduced for display interior.
In the embodiment of the present invention, due between luminance sensor and normal brightness instrument there may be performance difference, and it is this
Difference may will affect subsequent brightness measurement and calibration, therefore, optionally, can first determine before display factory
For the brightness calibration function of luminance sensor self performance, convenient for carrying out brightness school in the use process of luminance sensor
It is quasi-.
As shown in fig.1, corresponding brightness calibration letter is arranged for luminance sensor in display in the embodiment of the present invention
It is several that detailed process is as follows:
Step 100: display is based on preset first measurement grayscale set, using in the first measurement grayscale set
Each grayscale acquires corresponding first brightness measurement signal set by luminance sensor in screen center region.
For example, it is assumed that including t grayscale in preset first measurement grayscale set, serial number 1-t, optionally, t can be with
Value is 255, then, by luminance sensor the first brightness measurement signal set that screen center region acquires can be with table
It is shown as:Wherein, t is the grayscale quantity in the first measurement grayscale set, and is adopted
The quantity of the brightness measurement signal in the first brightness measurement signal set collected, XsYsZs indicate luminance sensor at one
The brightness measurement signal acquired under grayscale.
Step 110: display is based on the first measurement grayscale set, using every in the first measurement grayscale set
A kind of grayscale acquires corresponding second brightness measurement signal set by normal brightness instrument in screen center region.
It similarly, include t grayscale in above-mentioned first measurement grayscale set, serial number 1-t, optionally, t can be with value
255, then, it can be indicated by normal brightness instrument in the second brightness measurement signal set that screen center region acquires are as follows:Wherein, t is the grayscale quantity and collected in the first measurement grayscale set
The quantity of brightness measurement signal in second brightness measurement signal set, XcYcZc indicate normal brightness instrument under a grayscale
One brightness measurement signal of acquisition.
Step 120: display determines the electronics bias of luminance sensor, and using the electronics bias to passing through
First brightness measurement signal set of the luminance sensor acquisition is adjusted.
When the screen of display is in black state, the measuring signal that theoretically luminance sensor detects is should be
0, but in practical application, due to electronic device self performance, even if luminance sensor also has can under black state
It can detect measuring signal, and collected measuring signal is the electronics bias of luminance sensor at this time.
Specifically, the electronics bias of luminance sensor can be indicated are as follows:
Then, display can use the brightness of the electronics bias to acquiring by the luminance sensor
Measuring signal is adjusted.
It can specifically indicate are as follows:
On the other hand, if the measuring accuracy of luminance sensor is higher, electronics bias is not present, then can not also execute
Step 120, details are not described herein.
Step 130: the first brightness measurement signal set and the standard that display is acquired based on the luminance sensor
Second brightness measurement signal set of luminance meter acquisition, calculates the brightness calibration function of the luminance sensor.
Specifically, brightness calibration function may be expressed as: G=T/S '=(T*S'T)*(S’*ST)- 1, wherein S 'TIt is S '
Transposed matrix.
Further, if the measuring accuracy of luminance sensor is higher, performance difference is not present between normal brightness instrument,
Step 100- step 130 can not also be then executed, that is, is not provided with brightness calibration function.
Further, in the embodiment of the present invention, due to the brightness in the screen edge region and screen center region of display
There are deviations for value, therefore, the brightness measurement signal acquired using luminance sensor in screen edge region, and it is bright using standard
Degree instrument can also have differences between the brightness measurement signal that screen center region uses, and therefore, optionally, can show
After device factory, the luminance errors mapping relations in screen edge region and screen center region are determined, convenient for sensing in brightness
Brightness calibration is carried out in the use process of device.
As shown in fig.2, display is arranged corresponding luminance errors for luminance sensor and reflects in the embodiment of the present invention
Penetrating relationship, detailed process is as follows:
Step 200: display is based on preset second measurement grayscale set, using in the second measurement grayscale set
Each grayscale acquires corresponding third brightness measurement signal set by luminance sensor in screen edge region.
Optionally, the grey-scale range of the second measurement grayscale set can be identical as the first measurement grayscale set, can also not
It is identical, preferably, the grey-scale range amount of being set as [0,255] of the second measurement grayscale set can therefrom can also be selected to refer to
64 fixed grayscale, alternatively, 128 specified grayscale.
Specifically, by luminance sensor the third brightness measurement signal set that screen edge region acquires can be with table
It is shown as:Wherein, t ' is the grayscale quantity in third measurement grayscale set, and is adopted
The quantity of the brightness measurement signal in third brightness measurement signal set collected, XsYsZs indicate luminance sensor at one
The brightness measurement signal acquired under grayscale.
Optionally, in order to shield the performance difference between luminance sensor and normal brightness instrument, if being set in step 130
Brightness calibration function G has been set, then has been finished in step 200, third brightness measurement signal set can have been carried out just using G
Step calibration.Specifically, such as, S'(XsYsZs)=G*S (XsYsZs).
Step 210: display is based on preset second measurement grayscale set, using in the second measurement grayscale set
Each grayscale acquires corresponding 4th brightness measurement signal set by normal brightness instrument in screen center region.
Specifically, by normal brightness instrument the 4th brightness measurement signal set that screen center region acquires can be with table
It is shown as:Wherein, t ' is the grayscale quantity in the second measurement grayscale set, and is adopted
The quantity of the brightness measurement signal in the 4th brightness measurement signal set collected, XcYcZc indicate normal brightness instrument at one
The brightness measurement signal acquired under grayscale.
Step 220: third measuring signal set is converted to corresponding third brightness value set by display, and by
Four measuring signal set are converted to corresponding 4th brightness value set.
Specifically, display can be multiplied using preset transition matrix with S'(XsYsZs) and T (XcYcZc) respectively,
The brightness measurement signal of the brightness measurement signal of luminance sensor output and the output of normal brightness value is respectively converted into accordingly
Brightness value, wherein the corresponding brightness value of a brightness measurement signal.
Therefore, after the converted matrix disposal of third brightness measurement signal set, available third brightness value set, the 4th
After the converted matrix disposal of brightness measurement signal set, corresponding 4th brightness value set can get, wherein for ease of description,
The serial number of brightness value set and the serial number of measuring signal set are consistent, and will not be described in great detail.
Step 230: display is based on the third brightness value set and the 4th brightness value set, is directed to institute respectively
It states each grayscale in the second measurement grayscale set and executes following operation: it is right in third brightness value set to record a kind of grayscale
The brightness value answered records a kind of grayscale corresponding brightness value in the 4th brightness value set, corresponds to a kind of grayscale,
Record the difference of the two kinds of brightness values obtained.
For example, at grayscale m, luminance sensor is adopted in screen edge region by taking a grayscale m as an example (1≤m≤t ')
Brightness value after the brightness measurement signal conversion of collection are as follows: Bs (m), and at grayscale m, normal brightness instrument is in central region
Brightness value after the brightness measurement signal conversion of domain acquisition are as follows: Bc (m),
The then difference of the corresponding two kinds of brightness values of grayscale m are as follows: Bc (m)-Bs (m).
Step 240: display converges the information that various grayscale record in correspondence the second measurement grayscale set
Always, as luminance errors mapping relations.
Specifically, be based on mode identical with above-mentioned grayscale m, display can obtain each grayscale it is corresponding two kinds it is bright
The difference of angle value can obtain luminance errors mapping relations after then unifying record.
Specifically, in the embodiment of the present invention, luminance errors mapping relations record are as follows:
Since the corresponding relationship between the brightness value in screen edge region and the brightness value in screen center region is non-linear
Relationship, therefore, it is necessary to record the corresponding relationship under each grayscale between two kinds of values, the mapping for being recorded as an entirety is closed
System, convenient for being used when subsequent calibrations.
For example, as shown in fig.3, F can be indicated using two curves shown in Fig. 3 in the embodiment of the present invention, wherein
Abscissa indicates grayscale, and ordinate indicates that brightness value, solid line indicate the brightness that normal brightness instrument acquires in screen center region
Value, dotted line indicate the brightness value that luminance sensor acquires in screen edge region.
Certainly, the content of above-mentioned F characterization can also be recorded using forms mode, no longer superfluous herein in order to search
It states.
Based on above-mentioned preset brightness calibration function and luminance errors mapping relations, as shown in fig.4, the present invention is implemented
In example, display carries out brightness measurement and the detailed process of calibration is as follows:
Step 400: display acquires corresponding side by luminance sensor in screen edge region using specified grayscale
Edge brightness measurement signal.
For example, it is assumed that the edge brightness measuring signal of display acquisition indicates are as follows:Wherein, m
For the serial number for specifying grayscale, XsmYsmZsm indicates the corresponding edge brightness measurement letter that luminance sensor is acquired at grayscale m
Number.
Step 410: display is based on preset brightness calibration function, calibrates to the edge brightness measuring signal,
The brightness calibration function characterizes the measurement result difference between the luminance sensor and normal brightness instrument.
Optionally, display can using the brightness calibration function G obtained in above-mentioned steps 130, to S (XsYsZs) into
Row calibration, can specifically indicate are as follows: S'(XsYsZs)=G*S (XsYsZs).
On the other hand, however, it is determined that the measurement of luminance sensor is accurately higher, and e.g., the performance difference with normal brightness instrument can
To ignore, then step 410 can not also be executed, and directly execute the operation after step 410 using S (XsYsZs), the present invention
Embodiment, only S (XsYsZs) is calibrated to S'(XsYsZs) for be illustrated, will not be described in great detail.
Step 420: display, which obtains, is based on preset luminance errors mapping relations, determines that the specified grayscale is corresponding
Luminance errors calibration value, the luminance errors mapping relations have recorded under each grayscale of setting, screen edge region it is bright
Corresponding relationship between angle value and the brightness value in screen center region.
Specifically, specified grayscale is grayscale m, then display can be based on the luminance errors mapping being arranged in above-mentioned steps 240
Relationship determines that the corresponding luminance errors calibration value of grayscale m is F (m).
Step 430: the edge brightness measuring signal is converted to corresponding edge brightness value by display, and uses institute
Luminance errors calibration value is stated, the edge brightness value is calibrated, obtains corresponding center brightness value.
Specifically, edge brightness measuring signal can be converted to corresponding edge brightness value using transition matrix, i.e., will
S'(XsYsZs corresponding Bs ' (m)) is converted to, then, F (m) is based on, obtains corresponding center brightness value are as follows: Bc (m)=Bs '
(m)+F (m), then Bc (m) is the brightness value of the screen intermediate region finally measured.
Based on the above embodiment, as shown in fig.5, the embodiment of the present invention provides a kind of display, processor is included at least
50 and luminance sensor 51, wherein
The processor 50 is used for:
Using specified grayscale, corresponding edge brightness measurement letter is acquired by luminance sensor 51 in screen edge region
Number；
The edge brightness measuring signal is converted into corresponding edge brightness value, and is reflected based on preset luminance errors
Relationship is penetrated, the edge brightness value is calibrated, obtains corresponding center brightness value；Wherein, the luminance errors mapping is closed
System has recorded under each grayscale of setting, between the brightness value in screen edge region and the brightness value in screen center region
Corresponding relationship.
Optionally, when the luminance errors mapping relations are arranged, processor 50 is specifically used for:
Shielded based on preset second measurement grayscale set using each grayscale in the second measurement grayscale set
Curtain fringe region acquires corresponding third brightness measurement signal set by luminance sensor 51；
Based on the second measurement grayscale set, using each grayscale in the second measurement grayscale set, in screen
Central area acquires corresponding 4th brightness measurement signal set by normal brightness instrument；
Third measuring signal set is converted into corresponding third brightness value set, and by the 4th measuring signal set
Be converted to corresponding 4th brightness value set, and respectively for it is described second measurement grayscale set in each grayscale execute with
Lower operation: a kind of grayscale corresponding brightness value in third brightness value set is recorded, records a kind of grayscale in the 4th brightness
A kind of corresponding brightness value in value set, corresponding grayscale, records the difference of two kinds of brightness values of acquisition；
It will summarize for the information of various grayscale records in the second measurement grayscale set, mapped as luminance errors
Relationship.
Optionally, after obtaining the edge brightness measured value, before being calibrated to corresponding edge brightness value,
Processor 50 is further used for:
Based on preset brightness calibration function, the edge brightness measuring signal is calibrated, the brightness calibration letter
Number characterizes the measurement result difference between the luminance sensor 51 and normal brightness instrument.
Optionally, when the brightness calibration function is arranged, processor 50 is specifically used for:
Shielded based on preset first measurement grayscale set using each grayscale in the first measurement grayscale set
Curtain central area acquires corresponding first brightness measurement signal set by luminance sensor 51；
Based on the first measurement grayscale set, using each grayscale in the first measurement grayscale set, in screen
Central area acquires corresponding second brightness measurement signal set by normal brightness instrument；
The first brightness measurement signal set and normal brightness instrument acquisition based on the luminance sensor 51 acquisition
Second brightness measurement signal set calculates the brightness verification function of the luminance sensor 51.
Optionally, after obtaining the first brightness measurement signal set, in the brightness verification for calculating luminance sensor 51
Before function, the processor is further used for:
Determine the electronics bias of the luminance sensor 51；
Using the electronics bias to the first brightness measurement signal set acquired by the luminance sensor 51 into
Row adjustment.
Based on the same inventive concept, the embodiment of the present invention provides a kind of storage medium, is stored with for realizing brightness measurement
Calibration method program, when described program is run by processor, execute following steps:
Using specified grayscale, corresponding edge brightness measuring signal is acquired by luminance sensor in screen edge region；
The edge brightness measuring signal is converted into corresponding edge brightness value, and is reflected based on preset luminance errors
Relationship is penetrated, the edge brightness value is calibrated, obtains corresponding center brightness value；Wherein, the luminance errors mapping is closed
System has recorded under each grayscale of setting, between the brightness value in screen edge region and the brightness value in screen center region
Corresponding relationship.
In conclusion, using specified grayscale, being adopted in screen edge region by luminance sensor in the embodiment of the present invention
After collecting corresponding edge brightness measuring signal, using preset luminance errors mapping relations, to the edge brightness measuring signal
Corresponding edge brightness value is calibrated, and corresponding center brightness value is obtained, wherein the luminance errors mapping relations record
Under each grayscale of setting, corresponding between the brightness value in screen edge region and the brightness value in screen center region is closed
System；In this way, any position that luminance sensor can be mounted on to screen edge region carries out the measurement of edge brightness value, pass through
After calibration, the center brightness value in accurate screen center region is got, is made so as to avoid because of the limitation of liquid crystal display technique
At measurement result inaccuracy problem, effectively increase calibration accuracy, reduce measurement error, and then ensure that medical treatment
Display is able to use most accurate most stable of parameter work.
Further, in order to shield the device performance bring measurement error due to luminance sensor itself, the present invention is real
It applies in example, by the corresponding edge brightness value of above-mentioned edge brightness measuring signal, is calibrated to before corresponding center brightness value,
It can be using the brightness calibration function of performance difference between characterization luminance sensor and normal brightness instrument, to edge brightness measurement
Signal, which carries out preliminary calibration, reduces measurement error in this way, calibration accuracy can be effectively improved further, to guarantee to cure
Treat the working performance of display.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer journey
Sequence product.Therefore, complete hardware embodiment, complete software embodiment or combining software and hardware aspects can be used in the present invention
The form of embodiment.Moreover, it wherein includes the calculating of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in machine usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions each in flowchart and/or the block diagram
The combination of process and/or box in process and/or box and flowchart and/or the block diagram.It can provide these computers
Processor of the program instruction to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices
To generate a machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute
For realizing the function of being specified in one or more flows of the flowchart and/or one or more blocks of the block diagram
Device.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that instruction stored in the computer readable memory generation includes
The manufacture of command device, the command device are realized in one box of one or more flows of the flowchart and/or block diagram
Or the function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that
Series of operation steps are executed on computer or other programmable devices to generate computer implemented processing, thus calculating
The instruction executed on machine or other programmable devices is provided for realizing in one or more flows of the flowchart and/or side
The step of function of being specified in block diagram one box or multiple boxes.
Although preferred embodiments of the present invention have been described, once a person skilled in the art knows basic wounds
The property made concept, then additional changes and modifications may be made to these embodiments.It is wrapped so the following claims are intended to be interpreted as
It includes preferred embodiment and falls into all change and modification of the scope of the invention.
Obviously, those skilled in the art can carry out various modification and variations without departing from this to the embodiment of the present invention
The spirit and scope of inventive embodiments.If being wanted in this way, these modifications and variations of the embodiment of the present invention belong to right of the present invention
Ask and its equivalent technologies within the scope of, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of calibration method of brightness measurement characterized by comprising
Using specified grayscale, corresponding edge brightness measuring signal is acquired by luminance sensor in screen edge region；
The edge brightness measuring signal is converted into corresponding edge brightness value, and is closed based on the mapping of preset luminance errors
System, calibrates the edge brightness value, obtains corresponding center brightness value；Wherein, the luminance errors mapping relations note
Under each grayscale for having recorded setting, corresponding between the brightness value in screen edge region and the brightness value in screen center region is closed
System.
2. the method as described in claim 1, which is characterized in that the luminance errors mapping relations are arranged, specifically include:
Based on preset second measurement grayscale set, using each grayscale in the second measurement grayscale set, on screen side
Edge region acquires corresponding third brightness measurement signal set by luminance sensor；
Based on the second measurement grayscale set, using each grayscale in the second measurement grayscale set, in screen center
Region acquires corresponding 4th brightness measurement signal set by normal brightness instrument；
Third measuring signal set is converted into corresponding third brightness value set, and the 4th measuring signal set is converted to
Corresponding 4th brightness value set, and following operation is executed for each grayscale in the second measurement grayscale set respectively:
A kind of grayscale corresponding brightness value in third brightness value set is recorded, records a kind of grayscale in the 4th brightness value set
A kind of corresponding brightness value, corresponding grayscale, records the difference of two kinds of brightness values of acquisition；
It will summarize for the information of various grayscale records in the second measurement grayscale set, as luminance errors mapping relations.
3. method according to claim 1 or 2, which is characterized in that after obtaining the edge brightness measured value, to corresponding
Edge brightness value calibrated before, further comprise:
Based on preset brightness calibration function, the edge brightness measuring signal is calibrated, the brightness calibration function table
Levy the measurement result difference between the luminance sensor and normal brightness instrument.
4. method as claimed in claim 3, which is characterized in that the brightness calibration function is arranged, specifically includes:
Based on preset first measurement grayscale set, using each grayscale in the first measurement grayscale set, in screen
Heart district domain acquires corresponding first brightness measurement signal set by luminance sensor；
Based on the first measurement grayscale set, using each grayscale in the first measurement grayscale set, in screen center
Region acquires corresponding second brightness measurement signal set by normal brightness instrument；
Second of the first brightness measurement signal set and normal brightness instrument acquisition based on luminance sensor acquisition is bright
Measuring signal set is spent, the brightness calibration function of the luminance sensor is calculated.
5. method as claimed in claim 4, which is characterized in that after obtaining the first brightness measurement signal set, counting
Before the brightness calibration function for calculating the luminance sensor, further comprise:
Determine the electronics bias of the luminance sensor；
The the first brightness measurement signal set acquired by the luminance sensor is adjusted using the electronics bias.
6. a kind of display, which is characterized in that including processor and luminance sensor, wherein
The processor is used for:
Using specified grayscale, corresponding edge brightness measuring signal is acquired by luminance sensor in screen edge region；
The edge brightness measuring signal is converted into corresponding edge brightness value, and is closed based on the mapping of preset luminance errors
System, calibrates the edge brightness value, obtains corresponding center brightness value；Wherein, the luminance errors mapping relations note
Under each grayscale for having recorded setting, corresponding between the brightness value in screen edge region and the brightness value in screen center region is closed
System.
7. display as claimed in claim 6, which is characterized in that when the luminance errors mapping relations are set, the processing
Implement body is used for:
Based on preset second measurement grayscale set, using each grayscale in the second measurement grayscale set, on screen side
Edge region acquires corresponding third brightness measurement signal set by luminance sensor；
Based on the second measurement grayscale set, using each grayscale in the second measurement grayscale set, in screen center
Region acquires corresponding 4th brightness measurement signal set by normal brightness instrument；
Third measuring signal set is converted into corresponding third brightness value set, and the 4th measuring signal set is converted to
Corresponding 4th brightness value set, and following operation is executed for each grayscale in the second measurement grayscale set respectively:
A kind of grayscale corresponding brightness value in third brightness value set is recorded, records a kind of grayscale in the 4th brightness value set
A kind of corresponding brightness value, corresponding grayscale, records the difference of two kinds of brightness values of acquisition；
It will summarize for the information of various grayscale records in the second measurement grayscale set, as luminance errors mapping relations.
8. display as claimed in claims 6 or 7, which is characterized in that after obtaining the edge brightness measured value, to phase
Before the edge brightness value answered is calibrated, the processor is further used for:
Based on preset brightness calibration function, the edge brightness measuring signal is calibrated, the brightness calibration function table
Levy the measurement result difference between the luminance sensor and normal brightness instrument.
9. display as claimed in claim 8, which is characterized in that when the brightness calibration function is set, the processing utensil
Body is used for:
Based on preset first measurement grayscale set, using each grayscale in the first measurement grayscale set, in screen
Heart district domain acquires corresponding first brightness measurement signal set by luminance sensor；
Based on the first measurement grayscale set, using each grayscale in the first measurement grayscale set, in screen center
Region acquires corresponding second brightness measurement signal set by normal brightness instrument；
Second of the first brightness measurement signal set and normal brightness instrument acquisition based on luminance sensor acquisition is bright
Measuring signal set is spent, the brightness verification function of the luminance sensor is calculated.
10. a kind of storage medium, which is characterized in that be stored with the program of the calibration method for realizing brightness measurement, the journey
When sequence is run by processor, following steps are executed:
Using specified grayscale, corresponding edge brightness measuring signal is acquired by luminance sensor in screen edge region；
The edge brightness measuring signal is converted into corresponding edge brightness value, and is closed based on the mapping of preset luminance errors
System, calibrates the edge brightness value, obtains corresponding center brightness value；Wherein, the luminance errors mapping relations note
Under each grayscale for having recorded setting, corresponding between the brightness value in screen edge region and the brightness value in screen center region is closed
System.
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Application publication date: 20190503 |