CN106297631B - A kind of display and its error correction method with curve data error correction - Google Patents
A kind of display and its error correction method with curve data error correction Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
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Abstract
The invention discloses a kind of display and its error correction method with curve data error correction, it is characterised in that: include: video card, decoding unit, curve data storage unit, communication unit, curvature correction unit, grayscale expanding element, coding unit and display unit；The video card sends a signal to curvature correction unit by decoding unit, and curve data storage unit sends a signal to curvature correction unit by communication unit, and curvature correction unit sends the signal to display unit by grayscale expanding element and coding unit；The decoding unit is decoded for video, and communication unit is used for error correction, and curvature correction unit is used for image rectification, and grayscale expanding element is encoded for extending grayscale number matches rear module bit wide, coding unit for vision signal.The present invention has the advantages that can reduce occur in display curve data loading procedure mistake probability, and can to curve data carry out error correction, thus make display it is anticipated that J curve effectJ shown.
Description
Technical field
Invention belongs to image display technology field, in particular to a kind of display with curve data error correction and its
Error correction method.
Background technique
In image display arts, to reach optimal display effect, curve correction process often is made to image data, and
For medical display, curvature correction meaning is especially great.Image after correction has more accurate grayscale, can make disease
Stove is easier to be detected by human eye, so that doctor more accurately diagnoses illness.
High portability, high integration are a kind of development trends of medical instrument, and medical display is often under this situation
Together with other integration of equipments.Inevitably occur interference problem, especially display curve data between various equipment
When load, integrated Medical Devices are in and power on start-up phase, and electromagnetic environment is increasingly complex, and display interior is respectively handled in addition
Chip was in the upper electrical derangement phase, curve data loading error was easy to appear, so as to cause the distortion of image.It is therefore desirable to aobvious
Show device curve data detected, error correction, to guarantee the perfect display of display.
Summary of the invention
Goal of the invention: the present invention provides a kind of display and its error correction method with curve data error correction, with solution
Certainly the problems of the prior art.
Technical solution: to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of display with curve data error correction, comprising: video card, decoding unit, curve data storage unit,
Communication unit, curvature correction unit, grayscale expanding element, coding unit and display unit；The video card is sent out by decoding unit
The number of delivering letters to curvature correction unit, curve data storage unit sends a signal to curvature correction unit, curve by communication unit
It corrects unit and display unit is sent the signal to by grayscale expanding element and coding unit；The decoding unit is used for video solution
Code, communication unit are used for error correction, and curvature correction unit is used for image rectification, and grayscale expanding element is for extending grayscale number matches
Rear module bit wide, coding unit are encoded for vision signal.
Further, the communication unit include: timing unit, handshake elements, communications interface unit, the pre- memory cell of curve and
Error correction unit；The timing unit sends the signal to communications interface unit by handshake elements, and communications interface unit is by signal
Handshake elements are fed back, error correction unit receives the signal of communications interface unit and the pre- memory cell of curve and exports correct data；Institute
State handshake elements for verify communication it is whether stable, communications interface unit be used for receive curve data, the pre- memory cell of curve is used for
Aim curve data are prestored, error correction unit is for correcting data error and exports correct data.
Further, the communications interface unit includes with lower interface: SPI interface, UART interface, I2C interface, USB interface.
Further, the curve data storage unit includes following memory: E2PROM, flash.
Further, the display unit is grayscale display unit or color display unit.
Further, based on a kind of display with curve data error correction described in claim 1-5 any one
Error correction method, including following operating procedure:
Step 1: the signal that video card exports is decoded as the signal that bit wide is M by decoding unit, wherein RGB is respectively M,
RGB is respectively the signal for indicating three kinds of colors of red, green, blue；
Step 2: the curve data inside curve data storage unit is read and after error correction by communication unit, it is sent to song
Line corrects unit, and wherein curve data is M+N；
Step 3: curvature correction unit makees curvature correction to the M digital video signal that decoding unit is sent, exported after correction
For M+N data, communication unit sends M+N data to curvature correction unit, and curvature correction unit is done on this basis
Correction；
Step 4: grayscale expanding element makees grayscale extension to the signal for the position M+N that curvature correction unit is sent, output is
K has output 2M+NThe ability of kind grayscale；
Step 5: the signal that the bit wide after coding unit exports coding is K is shown to display unit；
Wherein, in above-mentioned steps M be video card bit wide, N is the bit wide for needing to extend after calibration curve, and K is display unit
Bit wide.
Further, the curve data bit wide that curve data storage unit stores in the second step is M+N, totally 2MNumber
According to.
Further, curve data is predefined to shake hands there are the high address of curve data storage unit in the second step
There are the low address of curve data storage unit for data.
Further, in the second step, communication unit to reading and the error correction procedure of curve data the following steps are included:
Step (1), display power on rear timing unit and start to work, and when the T moment is arrived in timing, transmission is shaken hands commencing signal
To handshake elements, wherein T is more than or equal to 0；
Step (2), handshake elements read the handshake data of curve data storage unit low address by communications interface unit,
If the handshake data that reads and expected consistent, communications interface unit starts to read the curve data of high address, enters step
(3), if the handshake data read be expected inconsistent, repeatedly step (1)；
It is sent after the curve data for the curve A that step (3), communications interface unit read curve data storage unit high address
To error correction unit, error correction unit reads the aim curve B that the pre- memory cell of curve prestores simultaneously, and correlation curve A and curve B one by one
Data；
Step (4), i indicate 2MI-th in a data, as i=0, enable Ai=0；As i > 0, if i-th of curve data |
Ai-Bi|<Bi* P%, then it is assumed that curve data AiCorrectly, otherwise it is assumed that AiMistake, and correct it as Ai=Bi+Ai-1-Bi-1, wherein
0≤P≤100, P indicate that the otherness of display unit, the value of P are determined by the display effect maximum difference of display unit Different Individual
Fixed, identical is then 0；
Step (5) terminates error correction procedure, curve of output data to curvature correction unit.
Further, in the 4th step, grayscale expanding element is realized using frame per second control technology, by time-domain and sky
Between domain control RGB high K bit value between true value a and a+1 with frame per second and spatial position change, wherein value is the number of a+1
Amount is determined by low M+N-K of value, achievees the purpose that grayscale extends.
The utility model has the advantages that compared with prior art, the invention has the following advantages that
1, display loading curve data within the upper electrical derangement phase be can avoid, wrong probability of happening is reduced；
2, it can detect the correctness of curve data, and error correction carried out to wrong data.
Detailed description of the invention
Fig. 1 is the hardware structural diagram of display of the invention；
Fig. 2 is communication unit hardware structural diagram of the invention.
Specific embodiment
A kind of display with curve data error correction, comprising: video card, decoding unit, curve data storage unit,
Communication unit, curvature correction unit, grayscale expanding element, coding unit and display unit；The video card is sent out by decoding unit
The number of delivering letters to curvature correction unit, curve data storage unit sends a signal to curvature correction unit, curve by communication unit
It corrects unit and display unit is sent the signal to by grayscale expanding element and coding unit；The decoding unit is used for video solution
Code, communication unit are used for error correction, and curvature correction unit is used for image rectification, and grayscale expanding element is for extending grayscale number matches
Rear module bit wide, coding unit are encoded for vision signal.
Aforementioned communication unit includes: timing unit, handshake elements, communications interface unit, the pre- memory cell of curve and error correction list
Member；The timing unit sends the signal to communications interface unit by handshake elements, and communications interface unit arrives signal feedback
Handshake elements, error correction unit receive the signal of communications interface unit and the pre- memory cell of curve and export correct data；It is described to shake hands
Whether unit is stable for verifying communication, and communications interface unit is for receiving curve data, and the pre- memory cell of curve is for prestoring mesh
Curve data is marked, error correction unit is for correcting data error and exports correct data.
Aforementioned communication interface unit includes but is not limited to lower interface: SPI interface, UART interface, I2C interface, USB connect
Mouthful.
Aforementioned curve data storage unit includes but is not limited to following memory: E2PROM, flash.
Aforementioned display unit is grayscale display unit or color display unit.
A kind of error correction method of display with curve data error correction above-mentioned, including following operating procedure:
Step 1: the signal that video card exports is decoded as the signal that bit wide is M by decoding unit, wherein RGB is respectively M,
RGB is respectively the signal for indicating three kinds of colors of red, green, blue；
Step 2: the curve data inside curve data storage unit is read and after error correction by communication unit, it is sent to song
Line corrects unit, and wherein curve data is M+N；
Step 3: curvature correction unit makees curvature correction to the M digital video signal that decoding unit is sent, exported after correction
For M+N data, communication unit sends M+N data to curvature correction unit, and curvature correction unit is done on this basis
Correction；
Step 4: grayscale expanding element makees grayscale extension to the signal for the position M+N that curvature correction unit is sent, output is
K has output 2M+NThe ability of kind grayscale；
Step 5: the signal that the bit wide after coding unit exports coding is K is shown to display unit；
Wherein, in above-mentioned steps M be video card bit wide, N is the bit wide for needing to extend after calibration curve, and K is display unit
Bit wide.
The curve data bit wide that curve data storage unit stores in aforementioned second step is M+N, totally 2MA data.
There are the high address of curve data storage unit, predefined handshake data to exist for curve data in aforementioned second step
The low address of curve data storage unit.
In aforementioned second step, communication unit to reading and the error correction procedure of curve data the following steps are included:
Step (1), display power on rear timing unit and start to work, and when the T moment is arrived in timing, transmission is shaken hands commencing signal
To handshake elements, wherein T is more than or equal to 0；
Step (2), handshake elements read the handshake data of curve data storage unit low address by communications interface unit,
If the handshake data that reads and expected consistent, communications interface unit starts to read the curve data of high address, enters step
(3), if the handshake data read be expected inconsistent, repeatedly step (1)；
It is sent after the curve data for the curve A that step (3), communications interface unit read curve data storage unit high address
To error correction unit, error correction unit reads the aim curve B that the pre- memory cell of curve prestores simultaneously, and correlation curve A and curve B one by one
Data；
Step (4), i indicate 2MI-th in a data, as i=0, enable Ai=0；As i > 0, if i-th of curve data |
Ai-Bi|<Bi* P%, then it is assumed that curve data AiCorrectly, otherwise it is assumed that AiMistake, and correct it as Ai=Bi+Ai-1-Bi-1, wherein
0≤P≤100, P indicate that the otherness of display unit, the value of P are determined by the display effect maximum difference of display unit Different Individual
Fixed, identical is then 0；
Step (5) terminates error correction procedure, curve of output data to curvature correction unit.
In aforementioned 4th step, grayscale expanding element is realized using frame per second control technology, by time-domain and spatial domain control
RGB high K bit value processed is with frame per second and spatial position change between true value a and a+1, and wherein value is the quantity of a+1 by low M
+ N-K values determine, achieve the purpose that grayscale extends.
Below with reference to embodiment, the present invention will be further explained.
Fig. 1 is a kind of hardware structural diagram of display with curve data error correction of the invention, hardware
It is connected including video card, with video card for the decoded decoding unit of video, curve data storage unit and curve data storage unit
Be connected the curvature correction list for having the communication unit of error correction, being connected with decoding unit and communication unit and being used for image rectification
Member, the grayscale expanding element and grayscale for being connected with curvature correction unit and being used to extend grayscale number matches rear module bit wide
The display unit that expanding element is connected and is used for the coding unit of vision signal coding and is connected with coding unit.
Fig. 2 is communication unit hardware structural diagram, and hardware includes timing unit, is connected for verifying with timing unit
The whether stable handshake elements of communication are connected with handshake elements and curve data storage unit for the received communication of curve data
The pre- memory cell of interface unit, the curve for prestoring aim curve data is connected with communications interface unit and the pre- memory cell of curve and is used in combination
Export the error correction unit of correct data simultaneously in correcting data error.
It is M=8 with video card output, the bit wide of extension is N=4, and display unit is to be described in detail for K=8:
Step 1: the signal that video card exports is decoded as the signal that bit wide is 8 by decoding unit, wherein RGB is respectively 8；
Step 2: the curve data inside curve data storage unit is read and after error correction by communication unit, it is sent to song
Line corrects unit, and wherein curve data is 12；
Step 3: curvature correction unit makees curvature correction to the 8 digital video signals that decoding unit is sent, exported after correction
The data that bit wide is 12；
Step 4: grayscale expanding element makees grayscale extension, output bit to 12 signals that curvature correction unit is sent
Width is 8, has output 212The ability of kind grayscale
Step 5: the signal that the bit wide after coding unit exports coding is 8 is shown to display unit.
Based on the above technical solution, it further includes the following affiliated technical solutions:
In above-mentioned second step, since medical display has higher requirement, curve data storage unit to bit wide
The curve data bit wide of storage is 12, totally 28A data；There are the high address of curve data storage unit, low lands for curve data
Location storage is predefined handshake data；Communication unit to reading and the error correction procedure of curve data the following steps are included:
(1), display powers on rear timing unit and starts to work, and when the T moment is arrived in timing, transmission shakes hands commencing signal to holding
Hand unit, wherein T is more than or equal to 0；
(2), handshake elements read the handshake data of curve data storage unit low address by communications interface unit, if reading
The handshake data and expection taken is consistent, then communications interface unit starts to read the curve data of high address, enters step (3), if
The handshake data of reading and expection are inconsistent, then repeatedly step (1)；
(3), it is sent to and entangles after the curve data (curve A) of communications interface unit reading curve data storage unit high address
Wrong unit, error correction unit read the aim curve (curve B) that the pre- memory cell of curve prestores, and correlation curve A and song one by one simultaneously
The data of line B；
(4), as i=0, A is enabledi=0；As i > 0, if i-th of curve data | Ai-Bi|<Bi* P%, then it is assumed that curve data
AiCorrectly, otherwise it is assumed that AiMistake, and correct it as Ai=Bi+Ai-1-Bi-1, wherein the value of 0 < P < 100, P are by display unit
The display effect maximum difference of Different Individual determines；
(5), terminate error correction procedure, curve of output data to curvature correction unit.
In above-mentioned (4) step, grayscale expanding element is realized using frame per second control technology, by time-domain and spatial domain
RGB most-significant byte numerical value is controlled between true value a and a+1 with frame per second and spatial position change, the quantity that wherein value is a+1 by
Low 4 values determine, to achieve the purpose that grayscale extends.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of display with curve data error correction, it is characterised in that: include: video card, decoding unit, curve data
Storage unit, communication unit, curvature correction unit, grayscale expanding element, coding unit and display unit；
Wherein, the video card sends a signal to curvature correction unit by decoding unit, and curve data storage unit passes through communication
Unit sends a signal to curvature correction unit, and curvature correction unit is sent the signal to by grayscale expanding element and coding unit
Display unit；
Wherein, the decoding unit is decoded for video, and communication unit is used for error correction, and curvature correction unit is used for image rectification,
Grayscale expanding element is encoded for extending grayscale number matches rear module bit wide, coding unit for vision signal；
The communication unit includes: timing unit, handshake elements, communications interface unit, the pre- memory cell of curve and error correction unit；
Wherein, the timing unit sends the signal to communications interface unit by handshake elements, and communications interface unit is by signal
Handshake elements are fed back, error correction unit receives the signal of communications interface unit and the pre- memory cell of curve and exports correct data；
Wherein, whether the handshake elements are stable for verifying communication, and for communications interface unit for receiving curve data, curve is pre-
For memory cell for prestoring aim curve data, error correction unit is for correcting data error and exports correct data；
Correction procedure the following steps are included:
Step (1), display power on rear timing unit and start to work, and when the T moment is arrived in timing, transmission shakes hands commencing signal to holding
Hand unit, wherein T is more than or equal to 0；
Step (2), handshake elements read the handshake data of curve data storage unit low address by communications interface unit, if reading
The handshake data and expection taken is consistent, then communications interface unit starts to read the curve data of high address, enters step (3), if
The handshake data of reading and expection are inconsistent, then repeatedly step (1)；
It is sent to and entangles after the curve data for the curve A that step (3), communications interface unit read curve data storage unit high address
Wrong unit, error correction unit read the aim curve B that the pre- memory cell of curve prestores, and the number of correlation curve A and curve B one by one simultaneously
According to；
Step (4), i indicate 2MI-th in a data, as i=0, enable Ai=0；As i > 0, if i-th of curve data |
Ai-Bi|<Bi* P%, then it is assumed that curve data AiCorrectly, otherwise it is assumed that AiMistake, and correct it as Ai=Bi+Ai-1-Bi-1,
In 0≤P≤100, P indicates the otherness of display unit, the value of P by display unit Different Individual display effect maximum difference
It determines, identical is then 0；
Step (5) terminates error correction procedure, curve of output data to curvature correction unit.
2. a kind of display with curve data error correction according to claim 1, it is characterised in that: the communication
Interface unit includes with lower interface: SPI interface, UART interface, I2C interface, USB interface.
3. a kind of display with curve data error correction according to claim 1, it is characterised in that: the curve
Data storage cell includes following memory: E2PROM, flash.
4. a kind of display with curve data error correction according to claim 1, it is characterised in that: the display
Unit is grayscale display unit or color display unit.
5. the error correction side based on a kind of display with curve data error correction described in claim 1-4 any one
Method, it is characterised in that: including following operating procedure:
Step 1: the signal that video card exports is decoded as the signal that bit wide is M by decoding unit, wherein RGB is respectively M, RGB points
The signal of three kinds of colors of red, green, blue Wei not be indicated；
Step 2: the curve data inside curve data storage unit is read and after error correction by communication unit, it is sent to curve school
Positive unit, wherein curve data is M+N；
Step 3: curvature correction unit makees curvature correction to the M digital video signal that decoding unit is sent, output is M+ after correction
N data, communication unit send M+N data to curvature correction unit, and curvature correction unit corrects on this basis；
Step 4: grayscale expanding element makees grayscale extension to the signal for the position M+N that curvature correction unit is sent, output is K, tool
There is output 2M+NThe ability of kind grayscale；
Step 5: the signal that the bit wide after coding unit exports coding is K is shown to display unit；
Wherein, in above-mentioned steps M be video card bit wide, N is the bit wide for needing to extend after calibration curve, and K is the position of display unit
It is wide.
6. a kind of error correction method of display with curve data error correction according to claim 5, feature exist
In: the curve data bit wide that curve data storage unit stores in the second step be M+N, totally 2MA data.
7. a kind of error correction method of display with curve data error correction according to claim 5, feature exist
In: there are the high address of curve data storage unit for curve data in the second step, and there are curves for predefined handshake data
The low address of data storage cell.
8. a kind of error correction method of display with curve data error correction according to claim 5, feature exist
In: in the second step, communication unit to reading and the error correction procedure of curve data the following steps are included:
Step (1), display power on rear timing unit and start to work, and when the T moment is arrived in timing, transmission shakes hands commencing signal to holding
Hand unit, wherein T is more than or equal to 0；
Step (2), handshake elements read the handshake data of curve data storage unit low address by communications interface unit, if reading
The handshake data and expection taken is consistent, then communications interface unit starts to read the curve data of high address, enters step (3), if
The handshake data of reading and expection are inconsistent, then repeatedly step (1)；
It is sent to and entangles after the curve data for the curve A that step (3), communications interface unit read curve data storage unit high address
Wrong unit, error correction unit read the aim curve B that the pre- memory cell of curve prestores, and the number of correlation curve A and curve B one by one simultaneously
According to；
Step (4), i indicate 2MI-th in a data, as i=0, enable Ai=0；As i > 0, if i-th of curve data |
Ai-Bi|<Bi* P%, then it is assumed that curve data AiCorrectly, otherwise it is assumed that AiMistake, and correct it as Ai=Bi+Ai-1-Bi-1,
In 0≤P≤100, P indicates the otherness of display unit, the value of P by display unit Different Individual display effect maximum difference
It determines, identical is then 0；
Step (5) terminates error correction procedure, curve of output data to curvature correction unit.
9. a kind of error correction method of display with curve data error correction according to claim 5, feature exist
In: in the 4th step, grayscale expanding element is realized using frame per second control technology, by controlling RGB in time-domain and spatial domain
High K bit value is with frame per second and spatial position change between true value a and a+1, and wherein value is the quantity of a+1 by low M+N-K
The value of position determines, achievees the purpose that grayscale extends.
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| JP2001043346A (en) * | 1999-08-02 | 2001-02-16 | Canon Inc | Device and method for processing image, recording medium for image processing information and generating method therefor |
| JP3725454B2 (en) * | 2001-01-17 | 2005-12-14 | セイコーエプソン株式会社 | Output image adjustment for image files |
| KR100440216B1 (en) * | 2001-06-12 | 2004-07-19 | 주식회사 엘리아테크 | Gray scale expander with look-up-table |
| US7030846B2 (en) * | 2001-07-10 | 2006-04-18 | Samsung Electronics Co., Ltd. | Color correction liquid crystal display and method of driving same |
| WO2004015676A1 (en) * | 2002-08-09 | 2004-02-19 | Iljin Diamond Co., Ltd. | Extended resolution column correction |
| CN100397476C (en) * | 2004-03-12 | 2008-06-25 | 友达光电股份有限公司 | Colour compensation circuit of display and its compensation method |
| CN100454968C (en) * | 2004-10-08 | 2009-01-21 | 中华映管股份有限公司 | Display performance regulator circuit and method of display |
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