CN106157904B - Liquid crystal display and its display auto-correction method and device - Google Patents
Liquid crystal display and its display auto-correction method and device Download PDFInfo
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- CN106157904B CN106157904B CN201510194431.0A CN201510194431A CN106157904B CN 106157904 B CN106157904 B CN 106157904B CN 201510194431 A CN201510194431 A CN 201510194431A CN 106157904 B CN106157904 B CN 106157904B
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Abstract
The present invention relates to a kind of liquid crystal display and its display auto-correction methods and device.The display auto-correction method includes：The ambient brightness value of S1, the backlight brightness values for acquiring liquid crystal display and local environment；S2, the current backlight brightness value that liquid crystal display is adjusted according to the normal brightness value currently needed；S3, the most suitable standard luminosity curve of present displays is calculated according to ambient brightness value and current backlight brightness value；S4, according to the standard luminosity curve, correction is performed according to specific mathematical model, calculates the corresponding LUT data of display look-up table of the display；S5, according to the current display effect of newly generated LUT data updates.The present invention not only solves the real time correction problem of display, has also broken away from PC application software so that display can complete display correction work automatically by the adjusting of itself at any time, and save the management cost of manufacturer or hospital.
Description
Technical field
The present invention relates to display technology, more specifically to a kind of display and its display auto-correction method
And device.
Background technology
With the continuous development of people's living standard, how to live more healthy to become the mankind and pursue jointly
Target, therefore how could earlier, the disease of more reliable discovery body become the common pursuit of global doctor.Medical treatment is aobvious
Show device as the very important key node of medical industry, since there is different LCD technologies in each producer, if made
Image is shown with not corrected display, and same image can be made to show different effects on different displays.Allow display
It is the important technological core of numerous display manufacturers that whenever device, which can reach unified, consistent display effect,.
Due to first choice of the current liquid crystal display as medical display, and because of the characteristic of liquid crystal display, no matter
It is well-done CCFL fluorescent tubes or the LED backlight largely used at present, it all can be corresponding bright with the usage time of display
Degree can change therewith.Moreover, partial display is also affected by the ambient temperature and brightness changes.If no
It is done the correction work dispatched from the factory so LCD brightness and curve cannot being consistent property, so as to which same disease can be caused
The testing result of people shows different display effects in different hospitals or different displays, such inconsistent
Property very likely influences doctor to the support control of the state of an illness or even the phenomenon that there is also some mistaken diagnosis.It is so generally high-end at some
In terms of display and medical imaging display, display will pass through colour temperature and the correction of gamma in manufacture, could meet client
Requirement.But when on the one hand due to manufacture can only custom corrections it is limited, and client's purposes is very extensive, often requires to use not
With colour temperature with gamma to match the demand of client oneself.On the other hand due to display during use with
The variation of time and display voltage and the change of brightness, can change the display effect of display, so as to need further school
Needs could just be met.
But current medical display is in use, does not all correct for a long time generally or using PC installation behaviour
Make program to be corrected display.And generally using outer sensor or built-in sensors in conjunction with operating personnel scene
Simple operations, be finally completed the correction work again to display.It so not only cannot be timely to display
State carries out feedback compensation, and the practitioner for also needing to profession greatly increases the correct operation of its make displays profession
The use cost of display manufacturer or terminal hospital is added.
Invention content
The technical problem to be solved in the present invention is, for the drawbacks described above of the prior art, it is automatic to provide a kind of display
Bearing calibration and device and the liquid crystal display using this device.
The present invention proposes a kind of display auto-correction method on the one hand to solve its technical problem, including walking as follows
Suddenly：
The ambient brightness value of S1, the backlight brightness values for acquiring liquid crystal display and local environment；
S2, the current backlight brightness value that liquid crystal display is adjusted according to the normal brightness value currently needed；
S3, the most suitable normal brightness song of present displays is calculated according to ambient brightness value and current backlight brightness value
Line；
S4, according to the standard luminosity curve, correction is performed according to following mathematical model, calculates the aobvious of the display
Show the corresponding LUT data of look-up table：
Wherein, Lv is brightness value, and x is the DDL values of display, and Vmax is display chip processing maximum luminance variation position
Number, k are DDL and display spatial linear relation value, and n is and the relevant screen characteristics coefficient value offset of liquid crystal display；
S5, according to the current display effect of newly generated LUT data updates.
In one embodiment of display auto-correction method according to the present invention, the step S1 further comprises：
The backlight brightness values of liquid crystal display are detected by the backlight sensor being set in liquid crystal display, by being set on liquid
The ambient brightness value of ambient light sensor detection liquid crystal display local environment above crystal display screen.
In one embodiment of display auto-correction method according to the present invention, the step S2 further comprises：
Collected backlight brightness values and normal brightness value are compared, calculate error amount, and according to the error amount
The current backlight brightness value of liquid crystal display is adjusted to required brightness.
In one embodiment of display auto-correction method according to the present invention, the standard luminosity curve includes
GAMMA curves or DICOM curves.
In one embodiment of display auto-correction method according to the present invention, the step S5 further comprises：
Newly generated LUT data are write direct in display chip, and update current display effect, preserve current display
State.
The present invention proposes a kind of display automatic correction device on the other hand to solve its technical problem, is controlled including correction
Molding block, backlight control module, driver module, context detection module, backlight sensor and ambient light sensor, it is described
Corrective control module is electrically connected with the backlight control module, driver module, context detection module, the backlight control mould
Block is electrically connected with the backlight sensor, and the context detection module is electrically connected with the ambient light sensor, wherein：
The backlight sensor is used to acquire the backlight brightness values of liquid crystal display and is sent to backlight control module；
The ambient light sensor is used to acquire the ambient brightness value of liquid crystal display local environment and be sent to
Context detection module；
The backlight control module is used to obtain the back of the body of backlight sensor acquisition under the control of the Corrective control module
Brightness values simultaneously feed back to the Corrective control module；
The context detection module is used to obtain ambient light sensor acquisition under the control of the Corrective control module
Ambient brightness value and feed back to the Corrective control module；
The Corrective control module is used for according to the current backlight of normal brightness value adjustment liquid crystal display currently needed
Brightness value, and the most suitable normal brightness song of present displays is calculated according to ambient brightness value and current backlight brightness value
Line then according to the standard luminosity curve, performs correction, the display for calculating the display is looked into according to following mathematical model
Look for the corresponding LUT data of table：
Wherein, Lv is brightness value, and x is the DDL values of display, and Vmax is display chip processing maximum luminance variation position
Number, k are DDL and display spatial linear relation value, and n is and the relevant screen characteristics coefficient value offset of liquid crystal display；
The driver module is used for according to the current display effect of newly generated LUT data updates.
In one embodiment of display automatic correction device according to the present invention, the backlight sensor is set on liquid crystal
Inside display screen, the ambient light sensor is set on the top of liquid crystal display.
In one embodiment of display automatic correction device according to the present invention, the Corrective control module is according to current
The current backlight brightness value of normal brightness value adjustment liquid crystal display needed further comprises：By collected backlight brightness values
It is compared with normal brightness value, calculates error amount, and the current backlight brightness of liquid crystal display is adjusted according to the error amount
It is worth to required brightness.
In one embodiment of display automatic correction device according to the present invention, the standard luminosity curve includes
GAMMA curves or DICOM curves.
The present invention proposes a kind of liquid crystal display to solve its technical problem in another further aspect, including liquid crystal display, goes back
Including above-mentioned display automatic correction device.
The display Automatic Calibration Technique of the present invention has the advantages that：(1) rapidity, using mathematical model to aobvious
Show that device establishes unique corresponding relation, so as to restore the intrinsic brilliance state of display, save since acquisition screen characteristics are required
Plenty of time；(2) real-time adaptability, being combined using backlight sensor with ambient light sensor solid can be with Quick Acquisition to working as
The most suitable standard curve of display in preceding environment；(3) independence has broken away from PC application software, according to data model and standard
Display is allowed constantly to be in the state of self-perfection, provides best picture quality effect to the user.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is the logical construction schematic diagram of the display automatic correction device of one embodiment of the invention；
Fig. 2 is the flow chart of the display auto-correction method of one embodiment of the invention；
Fig. 3 is the front and rear brightness curve comparison diagram of correction.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The application proposes a kind of intelligent display Automatic Calibration Technique, not only solves the real time correction problem of display,
PC application software is also broken away from so that display can complete the school of display automatically by the adjusting of itself at any time
Positive work, thus solve the real time correction requirement for medical display, and saved the pipe of manufacturer or hospital
Manage cost.
Fig. 1 shows the logical construction schematic diagram of the display automatic correction device of one embodiment of the invention.Such as Fig. 1 institutes
Show, the present invention setting display automatic correction device, in real time brightness to liquid crystal display 150 automatically in liquid crystal display 100
It is corrected.The display automatic correction device includes Corrective control module 110, backlight control module 120, driver module
130th, context detection module 140, backlight sensor 170 and ambient light sensor 160.Corrective control module 110 and backlight control
Molding block 120, driver module 130, context detection module 140 are electrically connected, backlight control module 120 and backlight sensor
170 electrical connections, context detection module 140 are electrically connected with ambient light sensor 170.
Specifically as shown in Figure 1, backlight sensor 170 may be provided at the inside of liquid crystal display 150, for acquiring liquid crystal
The backlight brightness values of display screen 150 are simultaneously sent to backlight control module 120.Ambient light sensor 160 can be arranged on liquid
The top of crystal display screen 150, for acquiring the ambient brightness value of 150 local environment of liquid crystal display and being sent to environment inspection
Survey module 140.Backlight control module 120 is for 170 acquisition of acquisition backlight sensor under the control of Corrective control module 110
Backlight brightness values simultaneously feed back to Corrective control module 110.Context detection module 140 is used for the control in Corrective control module 110
The lower ambient brightness value for obtaining ambient light sensor 160 and acquiring simultaneously feeds back to Corrective control module 110.Corrective control module
110 ambient brightness values acquired for the backlight brightness values and ambient light sensor 160 that are acquired according to backlight sensor 170 are held
Row display correction.First, Corrective control module 110 is according to the normal brightness value adjustment liquid crystal display 150 currently needed
Current backlight brightness value.For example, collected backlight brightness values and normal brightness value are compared by Corrective control module 110,
Error amount is calculated, and the current backlight brightness value of liquid crystal display is adjusted according to the error amount, the backlight for finally making display is bright
Degree reaches required brightness.Then, Corrective control module 110 is calculated according to ambient brightness value and current backlight brightness value
The most suitable standard luminosity curve of present displays, the standard luminosity curve can be GAMMA curves or DICOM curves, can root
Factually border service condition selects.Then, Corrective control module 110 is according to the standard luminosity curve, according to following mathematical model
Perform correction, the corresponding LUT data of display look-up table of calculation display 100：
Wherein, Lv is brightness value,
X is the DDL values of display,
Vmax is display chip processing maximum luminance variation response coefficient,
K is DDL and display spatial linear relation value,
N is and the relevant screen characteristics coefficient value offset of liquid crystal display.
Mathematical model used by about more than correcting algorithm, first display can collect this display in manufacture
With the relevant screen characteristics data of liquid crystal display, then by data analysis, founding mathematical models allow each rifles of display DDL
Value and the screen characteristics data establish a kind of mathematical model special relationship as shown above.By the data of actual test, every
The relation pair that one rifle, that is, RGB rifles establish the brightness Lv of independent rifle as x inputs is answered, and R rifles, G rifles, B rifles are calculated respectively through fitting
Coefficient Vmax, k, n value.After establishing this curved line relation, can by input arbitrary x obtain it is corresponding accurate
Brightness value.
Finally, driver module 130 is according to the current display of 110 newly generated LUT data updates of Corrective control module
Effect.Specifically, driver module 130 writes direct newly generated LUT data in display chip, and updates current
Display effect preserves current display state.
Based on display automatic correction device described above, the present invention also proposes a kind of display auto-correction method.
Fig. 2 shows the flow charts of display auto-correction method 200 according to an embodiment of the invention.As shown in Fig. 2, the display
Device auto-correction method 200 includes the following steps：
In step S210, the backlight brightness values of liquid crystal display and the ambient brightness value of local environment are acquired.Specific implementation
In example, the present invention detects the backlight brightness values of liquid crystal display by the backlight sensor being set in liquid crystal display, by setting
The ambient brightness value of ambient light sensor detection liquid crystal display local environment above liquid crystal display.
In step S220, according to the current backlight brightness value of normal brightness value adjustment liquid crystal display currently needed.Example
Such as, collected backlight brightness values and normal brightness value can be compared in step S220, calculates error amount, and according to described
The current backlight brightness value of error amount adjustment liquid crystal display is to required brightness.
In step S230, the most suitable mark of present displays is calculated according to ambient brightness value and current backlight brightness value
Quasi- brightness curve.The standard luminosity curve of display has such as 1.8,2.0,2.2 etc. or DICOM of the GAMMA curves songs of standard
Line (standard medical image curve), can select according to actual conditions.
In step S240, according to the standard luminosity curve, correction is performed according to following mathematical model, calculates the display
The corresponding LUT data of display look-up table of device：
Wherein, Lv is brightness value,
X is the DDL values of display,
Vmax is display chip processing maximum luminance variation digit,
K is DDL and display spatial linear relation value,
N is and the relevant screen characteristics coefficient value offset of liquid crystal display.
In step S250, according to the current display effect of newly generated LUT data updates.Specifically, in step S250
Newly generated LUT data can be write direct in display chip, and update current display effect, preserve current display state,
Complete current correction operation.Fig. 3 shows that display auto-correction method according to the present invention carries out automatically correcting front and rear show
Show device brightness curve comparison diagram, wherein curve 301 is standard luminosity curve, and curve 302 is the primitive curve of liquid crystal display, bent
Line 303 is the brightness curve after correction.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of display auto-correction method, which is characterized in that include the following steps：
The ambient brightness value of S1, the backlight brightness values for acquiring liquid crystal display and local environment；
S2, the current backlight brightness value that liquid crystal display is adjusted according to the normal brightness value currently needed；
S3, the most suitable standard luminosity curve of present displays is calculated according to ambient brightness value and current backlight brightness value；
S4, according to the standard luminosity curve, correction is performed according to following mathematical model, the display for calculating the display is looked into
Look for the corresponding LUT data of table：
Wherein, Lv is brightness value, and x is the DDL values of display, and Vmax is that display chip handles maximum luminance variation digit, k is
DDL and display spatial linear relation value, n are and the relevant screen characteristics coefficient value offset of liquid crystal display；
S5, according to the current display effect of newly generated LUT data updates.
2. according to the method described in claim 1, it is characterized in that, the step S1 further comprises：
The backlight brightness values of liquid crystal display are detected by the backlight sensor being set in liquid crystal display, by being set on liquid crystal
The ambient brightness value of ambient light sensor detection liquid crystal display local environment above display screen.
3. according to the method described in claim 1, it is characterized in that, the step S2 further comprises：
Collected backlight brightness values and normal brightness value are compared, calculate error amount, and adjust according to the error amount
The current backlight brightness value of liquid crystal display is to required brightness.
4. according to the method described in claim 1, it is characterized in that, the standard luminosity curve includes GAMMA curves or DICOM
Curve.
5. according to the method described in claim 1, it is characterized in that, the step S5 further comprises：
Newly generated LUT data are write direct in display chip, and update current display effect, preserve current display shape
State.
6. a kind of display automatic correction device, which is characterized in that driven including Corrective control module, backlight control module, display
Dynamic model block, context detection module, backlight sensor and ambient light sensor, the Corrective control module and the backlight control
Module, driver module, context detection module electrical connection, the backlight control module are electrically connected with the backlight sensor,
The context detection module is electrically connected with the ambient light sensor, wherein：
The backlight sensor is used to acquire the backlight brightness values of liquid crystal display and is sent to backlight control module；
The ambient light sensor is used to acquire the ambient brightness value of liquid crystal display local environment and is sent to environment
Detection module；
The backlight control module is bright for obtaining the backlight of backlight sensor acquisition under the control of the Corrective control module
Angle value simultaneously feeds back to the Corrective control module；
The context detection module is used to obtain the ring of ambient light sensor acquisition under the control of the Corrective control module
Border brightness value simultaneously feeds back to the Corrective control module；
The Corrective control module is used for according to the current backlight brightness of normal brightness value adjustment liquid crystal display currently needed
Value, and the most suitable standard luminosity curve of present displays is calculated according to ambient brightness value and current backlight brightness value, so
Afterwards according to the standard luminosity curve, correction is performed according to following mathematical model, calculates the display look-up table of the display
Corresponding LUT data：
Wherein, Lv is brightness value, and x is the DDL values of display, and Vmax is that display chip handles maximum luminance variation digit, k is
DDL and display spatial linear relation value, n are and the relevant screen characteristics coefficient value offset of liquid crystal display；
The driver module is used for according to the current display effect of newly generated LUT data updates.
7. device according to claim 6, which is characterized in that the backlight sensor is set on inside liquid crystal display, institute
State the top that ambient light sensor is set on liquid crystal display.
8. device according to claim 6, which is characterized in that the Corrective control module is bright according to the standard currently needed
The current backlight brightness value of angle value adjustment liquid crystal display further comprises：By collected backlight brightness values and normal brightness value
It is compared, calculates error amount, and the current backlight brightness value of liquid crystal display is adjusted to required according to the error amount
Brightness.
9. device according to claim 6, which is characterized in that the standard luminosity curve includes GAMMA curves or DICOM
Curve.
10. a kind of liquid crystal display, including liquid crystal display, which is characterized in that further include such as any one of claim 6-9 institutes
The display automatic correction device stated.
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| CN201510194431.0A CN106157904B (en) | 2015-04-22 | 2015-04-22 | Liquid crystal display and its display auto-correction method and device |
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| CN107256696B (en) * | 2017-07-19 | 2019-08-13 | 深圳市华星光电半导体显示技术有限公司 | The display control method and display control program of liquid crystal display device |
| CN107564479B (en) * | 2017-09-12 | 2021-12-17 | 高创(苏州)电子有限公司 | Backlight adjusting method and backlight adjusting system |
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| CN113686894B (en) * | 2021-09-13 | 2023-02-24 | 南京巨鲨显示科技有限公司 | System and method for image inspection and calibration of medical display |
| CN114360466B (en) * | 2021-12-31 | 2023-05-09 | 北京德为智慧科技有限公司 | Display correction method and device for display, electronic equipment and storage medium |
| CN115547226B (en) * | 2022-10-17 | 2023-09-08 | 深圳市安立信电子有限公司 | Brightness self-checking and early warning method and device for medical display and electronic equipment |
| CN117079618B (en) * | 2023-10-18 | 2024-01-05 | 深圳可视科技有限公司 | LED liquid crystal display screen brightness correction method and system |
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