CN105810159B - Liquid crystal display control method and liquid crystal display - Google Patents
Liquid crystal display control method and liquid crystal display Download PDFInfo
- Publication number
- CN105810159B CN105810159B CN201410855434.XA CN201410855434A CN105810159B CN 105810159 B CN105810159 B CN 105810159B CN 201410855434 A CN201410855434 A CN 201410855434A CN 105810159 B CN105810159 B CN 105810159B
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- crystal display
- backlight
- display panel
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
Abstract
The present invention relates to a kind of liquid crystal display control method and liquid crystal displays, its method includes: after liquid crystal display energization, the dim signal of the picture signal scanning and backlight that start liquid crystal display panel scans, and the phase of the dim signal of the picture signal and backlight of liquid crystal display panel is asynchronous；The relationship of the picture signal scan frequency B of backlight dimming signal scanning frequency A and liquid crystal display panel meets: A > B, and A ≠ N*B, wherein N is the integer greater than 0.The invention avoids backlight photos to there is scintillation to screen scanning, improves the display image quality effect of the liquid crystal displays such as LCD TV, product is made to have high performance-price ratio, promote product competitiveness in the market.
Description
Technical field
The present invention relates to liquid crystal tv technology field more particularly to a kind of liquid crystal display control methods and liquid crystal display.
Background technique
In current liquid crystal display device, backlight and liquid crystal display panel (Open Cell) use synchronous scanning technology.?
Under backlight Duty=100% state, this technical application can meet to the requirement of liquid crystal display image quality；As backlight Duty < 100%,
There are bright back lights to sparkle state for backlight, and the synchronous scanning for liquid crystal display panel of arranging in pairs or groups again at this time will appear exception in image quality.
And with the development of liquid crystal tv technology, to pursue high image quality requirement, will increase in machine core image quality processing function
The technologies such as Local Dimming (the bright dark control in part), natural light, motion compensation.The application of these technologies, so that backlight
Duty value changes, and in user's use process, there are bright back lights to sparkle state for backlight, influences whether image quality effect.
Summary of the invention
The main purpose of the present invention is to provide a kind of liquid crystal display control method and liquid crystal displays, it is intended to promote liquid crystal
TV display image quality effect.
In order to achieve the above object, the present invention proposes a kind of liquid crystal display control method, comprising:
After liquid crystal display energization, the dim signal of the picture signal scanning and backlight that start liquid crystal display panel is swept
It retouches,
The phase of the dim signal of the picture signal and backlight of the liquid crystal display panel is asynchronous；
The relationship of the picture signal scan frequency B of the backlight dimming signal scanning frequency A and liquid crystal display panel meets:
A > B, and A ≠ N*B, wherein N is the integer greater than 0.
Preferably, the dim signal sweep start time is later than the described image signal scanning starting time.
Preferably, the first start-up time of the backlight of the backlight is when the liquid crystal of the liquid crystal display panel starts rotation
In the 1/5*Tr time after quarter, wherein Tr, which is switched between two pictures by the liquid crystal molecule of liquid crystal display panel, to be rotated
Time.
Preferably, the dim signal sweep start time and described image signal scanning start time warping, the back
The first start-up time of the backlight of tabula rasa within the 1/5*Tr time before the liquid crystal of the liquid crystal display panel terminates rotational instant,
In, Tr switches the time rotated by the liquid crystal molecule of liquid crystal display panel between two pictures.
Preferably, A > B+24HZ.
The embodiment of the present invention also proposes a kind of liquid crystal display for controlling liquid crystal display, comprising:
Starting module, for after liquid crystal display energization, starting the picture signal scanning and backlight of liquid crystal display panel
The dim signal of plate scans, and the phase of the dim signal of the picture signal and backlight of the liquid crystal display panel is asynchronous；It is described
The relationship of the picture signal scan frequency B of backlight dimming signal scanning frequency A and liquid crystal display panel meets: A > B, and A ≠ N*
B, wherein N is the integer greater than 0.
Preferably, the dim signal sweep start time is later than the described image signal scanning starting time.
Preferably, the first start-up time of the backlight of the backlight is when the liquid crystal of the liquid crystal display panel starts rotation
In the 1/5*Tr time after quarter, wherein Tr, which is switched between two pictures by the liquid crystal molecule of liquid crystal display panel, to be rotated
Time.
Preferably, the dim signal sweep start time and described image signal scanning start time warping, the back
The first start-up time of the backlight of tabula rasa within the 1/5*Tr time before the liquid crystal of the liquid crystal display panel terminates rotational instant,
In, Tr switches the time rotated by the liquid crystal molecule of liquid crystal display panel between two pictures.
Preferably, A > B+24HZ.
A kind of liquid crystal display control method and liquid crystal display that the embodiment of the present invention proposes are powered in liquid crystal display
Afterwards, the dim signal of the picture signal scanning and backlight that start liquid crystal display panel scans, the figure of the liquid crystal display panel
As the phase of signal and the dim signal of backlight is asynchronous；The image of backlight dimming signal scanning frequency A and liquid crystal display panel
The relationship of signal scanning frequency B meets: A > B, and A ≠ N*B, wherein N is the integer greater than 0, thus avoids backlight photo to screen
There is scintillation in scanning, improves the display image quality effect of the liquid crystal displays such as LCD TV, and product is made to have high performance-price ratio,
Promote product competitiveness in the market.
Detailed description of the invention
Fig. 1 is the scan frequency design of traditional backlight and liquid crystal display panel, carries machine core image quality processing function, corresponding
Single pixel point timing diagram；
Fig. 2 is that the scan frequency of traditional backlight and liquid crystal display panel designs, and carries machine core image quality processing function, uses
MPRT instrument test motion picture handoff procedure, the average RGB brightness variation curve of single pixel S cycle integrated of point；
Fig. 3 is the asynchronous Scan Design of phase of the backlight and liquid crystal display panel of the embodiment of the present invention, carries machine core image quality
Processing function, a kind of timing diagram of corresponding single pixel point；
Fig. 4 is the asynchronous Scan Design of phase of the backlight and liquid crystal display panel of the embodiment of the present invention, carries machine core image quality
Processing function, another timing diagram of corresponding single pixel point；
Fig. 5 is the backlight and the asynchronous Scan Design of liquid crystal display panel of the embodiment of the present invention, carries machine core image quality and handles function
Can, using MPRT instrument test motion picture handoff procedure, the average RGB brightness change of single pixel S cycle integrated of point is bent
Line.
In order to keep technical solution of the present invention clearer, clear, it is described in further detail below in conjunction with attached drawing.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The solution of the embodiment of the present invention is mainly: after liquid crystal display energization, starting the figure of liquid crystal display panel
As signal scanning and the scanning of the dim signal of backlight, the phase of the dim signal of the picture signal and backlight of liquid crystal display panel
Position is asynchronous；；In addition, backlight dimming signal frequency (backlight drive board PWM frequency) A, not with the scan frequency B of liquid crystal display panel
Together, meanwhile, to avoid backlight photo from scintillation occur to screen scanning, backlight scan frequency at least more than screen scan frequency 24HZ,
That is A > B+24HZ, and A ≠ N*B (N=1,2 ...) can greatly promote liquid crystal display image quality effect by above-mentioned timing Design.
Present pre-ferred embodiments propose a kind of liquid crystal display control method, comprising:
After liquid crystal display energization, the dim signal of the picture signal scanning and backlight that start liquid crystal display panel is swept
It retouches, the phase of the dim signal of the picture signal and backlight of the liquid crystal display panel is asynchronous；The backlight dimming signal is swept
The relationship for retouching the picture signal scan frequency B of frequency A and liquid crystal display panel meets: A > B, and A ≠ N*B, wherein N is greater than 0
Integer.
Since in the prior art, in backlight Duty < 100%, there are bright back lights to sparkle state for backlight, meanwhile, backlight and liquid
LCD panel uses synchronous scanning, causes picture image quality to occur abnormal.
The dim signal of this embodiment scheme backlight and the asynchronous scanning of liquid crystal display panel, even if liquid crystal display panel
The phase of the dim signal of picture signal and backlight is asynchronous, and adjusts backlight dimming signal scanning frequency A and LCD display
The picture signal scan frequency B of plate is different, machine core image quality processing function of arranging in pairs or groups, and can flash to avoid backlight photo to screen scanning
Phenomenon realizes the optimization of liquid crystal display image quality.
Specifically, after liquid crystal display energization, firstly, the machine core of liquid crystal display drives to the screen of liquid crystal display panel
Received image signal scan control signal, the screen driving of liquid crystal display panel is according to the picture signal scan control letter received
Number, starting picture signal scans, and the liquid crystal molecule in liquid crystal display panel starts to rotate；In addition, the screen of liquid crystal display panel drives
Trend backlight drive feedback corresponding control signal opens after backlight drive receives the control signal of liquid crystal display panel feedback
Dynamic dim signal scanning, and the backlight open moment of backlight is controlled, it periodically controls bright flush type switch and is dimmed.
In the present embodiment, by believing that the starting time of backlight dimming signal scanning compared to the image of liquid crystal display panel
Number scanning starting time T1 have certain time-delay, and adjust backlight dimming signal scanning frequency and liquid crystal display panel figure
As signal scanning frequency difference, the scanning phase of the dim signal and screen of realizing backlight is asynchronous.
In order to prevent liquid crystal rotate caused by blur effect be detected by human eye, generally, liquid crystal rotation start after and
1/5*Tr (Tr switches the time rotated by the liquid crystal molecule of liquid crystal display panel between the two pictures) time before end
It is interior, it is believed that liquid crystal status starts before rotating with it or the postrotational stable state of end is consistent, therefore, in this section,
Backlight carries out breakdown action, will not derive the bad problem of image quality.
Based on above-mentioned consideration, the present embodiment can specifically be used when controlling at the backlight open moment to backlight
Following scheme:
It as an implementation, can be refering to what is shown in Fig. 3, starting liquid crystal display panel after liquid crystal display energization
Picture signal scanning, the starting time be T1, control beginning sweep time and the liquid crystal display panel of the dim signal of backlight
Picture signal beginning sweep time T1 it is unequal, when the dim signal sweep start time is later than picture signal sweep start
Between；In addition, the interior starting backlight of △ T time after tl, the △ T is after the liquid crystal molecule rotation of liquid crystal display panel starts
1/5*Tr, i.e., control backlight the backlight open moment within the 1/5*Tr time after liquid crystal starts rotational instant, wherein Tr
Switch the time rotated between two pictures by the liquid crystal molecule of liquid crystal display panel.
It as another embodiment, can be refering to what is shown in Fig. 4, starting LCD display after liquid crystal display energization
The picture signal of plate scans, and the starting time is T1；Dim signal sweep start time and described image signal scanning start the time
Dislocation, Tr- △ T time after tl is interior to start backlight, and the △ T is before the liquid crystal molecule rotation of liquid crystal display panel terminates
1/5*Tr, i.e., control backlight the backlight open moment within the 1/5*Tr time before liquid crystal terminates rotational instant, wherein Tr
Switch the time rotated between two pictures by the liquid crystal molecule of liquid crystal display panel, Tr is the liquid crystal of liquid crystal display panel
Molecule switches the rotated time between two pictures.
After the picture signal scanning of starting liquid crystal display panel and backlight dimming signal scanning, backlight drive board is adjusted
PWM frequency A keeps it asynchronous with the scan frequency B of liquid crystal display panel, meanwhile, to avoid backlight photo from flashing screen scanning
Phenomenon meets the relationship of the picture signal scan frequency B of backlight dimming signal scanning frequency A and liquid crystal display panel: A > B,
And A ≠ N*B, wherein N is the integer greater than 0, and as a preferred embodiment, backlight scan frequency is at least more than screen scan frequency
24HZ, i.e. A > B+24HZ, and A ≠ N*B (N=1,2 ...).Above-mentioned timing Design can greatly promote liquid crystal display image quality effect
Fruit.
The present embodiment through the above scheme, after liquid crystal display energization, sweep by the picture signal for starting liquid crystal display panel
It retouches and is scanned with the dim signal of backlight, the phase of the dim signal of the picture signal and backlight of liquid crystal display panel is asynchronous；
The relationship of the picture signal scan frequency B of backlight dimming signal scanning frequency A and liquid crystal display panel meets: A > B, and A ≠ N*
B, wherein N is the integer greater than 0, thus avoids backlight photo and scintillation occurs to screen scanning, improves the liquid such as LCD TV
The display image quality effect of crystal display makes product have high performance-price ratio, promotes product competitiveness in the market.
Further, the embodiment of the present invention is tested for the improvement of image quality, and it is imitative can to introduce MPRT instrument test
True result is as image quality judgment criteria.
Wherein, MPRT instrument is simulation eye-observation motion picture image quality effect, and it is quantified with chart mode
Test equipment.
Shown in referring to FIG. 1 and FIG. 2, Fig. 1 is the scanning frequency of traditional backlight (BLU) Yu liquid crystal display panel (OpenCell)
Rate design, carries machine core image quality processing function, corresponding single pixel point timing diagram.
Fig. 2 is that the scan frequency of traditional backlight and liquid crystal display panel designs, and carries machine core image quality processing function, uses
MPRT instrument test motion picture handoff procedure, the average RGB brightness change of single pixel point S (S >=20) a cycle integrated are bent
Line.
Since traditional backlight and liquid crystal display panel are synchronous scanning, single pixel point is within S period, backlight switch
It is scanned with liquid crystal display panel and is constantly in same phase, after integral, can obviously observed that RGB curve exists from curve and turn
The bright back light of point, i.e. backlight is bright to be caught in, and the image quality effect for being reacted to human eye is deteriorated.
Referring to shown in Fig. 3 and Fig. 4, Fig. 3 and Fig. 4 are respectively the dim signal and liquid crystal of the backlight of the embodiment of the present invention
Show that the asynchronous Scan Design of the phase of the picture signal of panel is carried that is, after adjusting backlight starting time and backlight drive PWM frequency
Machine core image quality processing function, two kinds of timing diagrams of corresponding single pixel point.Wherein, Tr switches institute between two pictures for liquid crystal
The time of rotation.
In order to prevent liquid crystal rotate caused by blur effect be detected by human eye, generally, liquid crystal rotation start after and
In the 1/5*Tr time before end, it is believed that liquid crystal status starts before rotating or terminate postrotational stable state one with it
It causes, therefore, in this section, backlight carries out breakdown action, will not derive the bad problem of image quality.
In the present embodiment, in the phase asynchronous design of backlight and liquid crystal display panel, the scanning of liquid crystal display panel and back
In the control of photopolymerization initiation time, needing to meet the backlight open moment meets liquid crystal and is kept for stable state moment, i.e. backlight open moment
Postpone the scanning start-up time in liquid crystal display panel, the backlight open moment can be in the △ T after liquid crystal starts rotational instant
In=1/5*Tr the time (timing diagram as shown in Figure 3), or within the preceding △ T=1/5*Tr time that liquid crystal terminates rotational instant (such as
Timing diagram shown in Fig. 4).
Referring to Figure 5, Fig. 5 is the backlight and the asynchronous Scan Design of liquid crystal display panel of the embodiment of the present invention, carries machine
Core image quality processing function uses MPRT instrument test motion picture handoff procedure, single pixel point S (S >=20) a cycle integrated
Average RGB brightness variation curve.
From fig. 5, it can be seen that single pixel point is in S since backlight and liquid crystal display panel of the invention are asynchronous scanning
In a period, the scanning phase of backlight switch and liquid crystal display panel changes always, can be observed from curve after integral
Inflection point is not present in RGB curve, i.e. for the bright dark scintillation of backlight by this technical optimization, the image quality for being reacted to human eye is effect improved to most
Good state.
Accordingly, the liquid crystal display of present invention control liquid crystal display is proposed.
Present pre-ferred embodiments propose it is a kind of control liquid crystal display liquid crystal display, comprising: starting module wherein:
Starting module 201, for after liquid crystal display energization, starting picture signal scanning and the back of liquid crystal display panel
The dim signal of tabula rasa scans, and the phase of the dim signal of the picture signal and backlight of liquid crystal display panel is asynchronous；Backlight tune
The relationship of the picture signal scan frequency B of optical signal scan frequency A and liquid crystal display panel meets: A > B, and A ≠ N*B, wherein
N is the integer greater than 0.
Further, the starting module 201 is also used to control the backlight open moment of backlight, specific to use
Believe in the image for starting sweep time and liquid crystal display panel for the dim signal for after liquid crystal display is powered, controlling backlight
Number beginning sweep time it is unequal；And control 1/5*Tr of the backlight open moment of backlight after liquid crystal starts rotational instant
In time, wherein Tr switches the time rotated by the liquid crystal molecule of liquid crystal display panel between two pictures；Or control
The backlight open moment of backlight is within the 1/5*Tr time before liquid crystal terminates rotational instant, wherein Tr is liquid crystal display panel
Liquid crystal molecule switch the rotated time between two pictures.
Specifically, after liquid crystal display energization, firstly, the machine core of liquid crystal display drives to the screen of liquid crystal display panel
Received image signal scan control signal, the screen driving of liquid crystal display panel is according to the picture signal scan control letter received
Number, starting picture signal scans, and the liquid crystal molecule in liquid crystal display panel starts to rotate；In addition, the screen of liquid crystal display panel drives
Trend backlight drive feedback corresponding control signal opens after backlight drive receives the control signal of liquid crystal display panel feedback
Dynamic dim signal scanning, and the backlight open moment of backlight is controlled, it periodically controls bright flush type switch and is dimmed.
In the present embodiment, by believing that the starting time of backlight dimming signal scanning compared to the image of liquid crystal display panel
The starting time T1 of number scanning has certain time-delay, and the dim signal sweep start time is later than described image signal scanning and opens
Dynamic time or the dim signal sweep start time and described image signal scanning start time warping, and adjust backlight
Dim signal scan frequency is different with the picture signal scan frequency of liquid crystal display panel, realizes the dim signal and screen of backlight
Scanning phase it is asynchronous.
In order to prevent liquid crystal rotate caused by blur effect be detected by human eye, generally, liquid crystal rotation start after and
1/5*Tr (Tr switches the time rotated by the liquid crystal molecule of liquid crystal display panel between the two pictures) time before end
It is interior, it is believed that liquid crystal status starts before rotating with it or the postrotational stable state of end is consistent, therefore, in this section,
Backlight carries out breakdown action, will not derive the bad problem of image quality.
Based on above-mentioned consideration, when controlling at the backlight open moment to backlight, can specifically following scheme be used:
It as an implementation, can be refering to what is shown in Fig. 3, starting liquid crystal display panel after liquid crystal display energization
Picture signal scanning, the starting time be T1, control beginning sweep time and the liquid crystal display panel of the dim signal of backlight
Picture signal beginning sweep time T1 it is unequal, when the dim signal sweep start time is later than picture signal sweep start
Between；In addition, the interior starting backlight of △ T time after tl, the △ T is after the liquid crystal molecule rotation of liquid crystal display panel starts
1/5*Tr, i.e., control backlight the backlight open moment within the 1/5*Tr time after liquid crystal starts rotational instant, wherein Tr
Switch the time rotated between two pictures by the liquid crystal molecule of liquid crystal display panel.
It as another embodiment, can be refering to what is shown in Fig. 4, starting LCD display after liquid crystal display energization
The picture signal of plate scans, and the starting time is T1；Dim signal sweep start time and described image signal scanning start the time
Dislocation, Tr- △ T time after tl is interior to start backlight, and the △ T is before the liquid crystal molecule rotation of liquid crystal display panel terminates
1/5*Tr, i.e., control backlight the backlight open moment within the 1/5*Tr time before liquid crystal terminates rotational instant, wherein Tr
Switch the time rotated between two pictures by the liquid crystal molecule of liquid crystal display panel, Tr is the liquid crystal of liquid crystal display panel
Molecule switches the rotated time between two pictures.
After the picture signal scanning of starting liquid crystal display panel and backlight dimming signal scanning, backlight drive board is adjusted
PWM frequency A keeps it asynchronous with the scan frequency B of liquid crystal display panel, meanwhile, to avoid backlight photo from flashing screen scanning
Phenomenon meets the relationship of the picture signal scan frequency B of backlight dimming signal scanning frequency A and liquid crystal display panel: A > B,
And A ≠ N*B, wherein N is the integer greater than 0, and as a preferred embodiment, backlight scan frequency is at least more than screen scan frequency
24HZ, i.e. A > B+24HZ, and A ≠ N*B (N=1,2 ...).Above-mentioned timing Design can greatly promote liquid crystal display image quality effect
Fruit.
The present embodiment through the above scheme, after liquid crystal display energization, sweep by the picture signal for starting liquid crystal display panel
It retouches and is scanned with the dim signal of backlight, the phase of the dim signal of the picture signal and backlight of liquid crystal display panel is asynchronous；
The relationship of the picture signal scan frequency B of backlight dimming signal scanning frequency A and liquid crystal display panel meets: A > B, and A ≠ N*
B, wherein N is the integer greater than 0, thus avoids backlight photo and scintillation occurs to screen scanning, improves the liquid such as LCD TV
The display image quality effect of crystal display makes product have high performance-price ratio, promotes product competitiveness in the market.
Further, the embodiment of the present invention is tested for the improvement of image quality, and it is imitative can to introduce MPRT instrument test
True result is as image quality judgment criteria.
Wherein, MPRT instrument is simulation eye-observation motion picture image quality effect, and it is quantified with chart mode
Test equipment.
Shown in referring to FIG. 1 and FIG. 2, Fig. 1 is the scanning frequency of traditional backlight (BLU) Yu liquid crystal display panel (OpenCell)
Rate design, carries machine core image quality processing function, corresponding single pixel point timing diagram.
Fig. 2 is that the scan frequency of traditional backlight and liquid crystal display panel designs, and carries machine core image quality processing function, uses
MPRT instrument test motion picture handoff procedure, the average RGB brightness change of single pixel point S (S >=20) a cycle integrated are bent
Line.
Since traditional backlight and liquid crystal display panel are synchronous scanning, single pixel point is within S period, backlight switch
It is scanned with liquid crystal display panel and is constantly in same phase, after integral, can obviously observed that RGB curve exists from curve and turn
The bright back light of point, i.e. backlight is bright to be caught in, and the image quality effect for being reacted to human eye is deteriorated.
Referring to shown in Fig. 3 and Fig. 4, Fig. 3 and Fig. 4 are respectively the dim signal and liquid crystal of the backlight of the embodiment of the present invention
Show that the asynchronous Scan Design of the phase of the picture signal of panel is carried that is, after adjusting backlight starting time and backlight drive PWM frequency
Machine core image quality processing function, two kinds of timing diagrams of corresponding single pixel point.Wherein, Tr switches institute between two pictures for liquid crystal
The time of rotation.
In order to prevent liquid crystal rotate caused by blur effect be detected by human eye, generally, liquid crystal rotation start after and
In the 1/5*Tr time before end, it is believed that liquid crystal status starts before rotating or terminate postrotational stable state one with it
It causes, therefore, in this section, backlight carries out breakdown action, will not derive the bad problem of image quality.
In the present embodiment, in the phase asynchronous design of backlight and liquid crystal display panel, the scanning of liquid crystal display panel and back
In the control of photopolymerization initiation time, needing to meet the backlight open moment meets liquid crystal and is kept for stable state moment, i.e. backlight open moment
Postpone the scanning start-up time in liquid crystal display panel, the backlight open moment can be in the △ T after liquid crystal starts rotational instant
In=1/5*Tr the time (timing diagram as shown in Figure 3), or within the preceding △ T=1/5*Tr time that liquid crystal terminates rotational instant (such as
Timing diagram shown in Fig. 4).
Referring to Figure 5, Fig. 5 is the backlight and the asynchronous Scan Design of liquid crystal display panel of the embodiment of the present invention, carries machine
Core image quality processing function uses MPRT instrument test motion picture handoff procedure, single pixel point S (S >=20) a cycle integrated
Average RGB brightness variation curve.
From fig. 5, it can be seen that single pixel point is in S since backlight and liquid crystal display panel of the invention are asynchronous scanning
In a period, the scanning phase of backlight switch and liquid crystal display panel changes always, can be observed from curve after integral
Inflection point is not present in RGB curve, i.e. for the bright dark scintillation of backlight by this technical optimization, the image quality for being reacted to human eye is effect improved to most
Good state.
Liquid crystal display control method of the embodiment of the present invention and liquid crystal display start liquid crystal after liquid crystal display energization
The picture signal scanning of display panel and the dim signal of backlight scan, and make the picture signal and backlight of liquid crystal display panel
Dim signal phase it is asynchronous；The picture signal for adjusting backlight dimming signal scanning frequency A and liquid crystal display panel scans frequency
Rate B meets the relationship of the picture signal scan frequency B of backlight dimming signal scanning frequency A and liquid crystal display panel: A > B, and
A ≠ N*B, wherein N is the integer greater than 0, thus avoids backlight photo and scintillation occurs to screen scanning, improves liquid crystal electricity
Depending on etc. liquid crystal displays display image quality effect, make product have high performance-price ratio, promoted product competitiveness in the market.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure made by description of the invention and accompanying drawing content or process transformation, are applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (6)
1. a kind of liquid crystal display control method characterized by comprising
After liquid crystal display energization, the dim signal of the picture signal scanning and backlight that start liquid crystal display panel is scanned,
The phase of the dim signal of the picture signal and backlight of the liquid crystal display panel is asynchronous；
The relationship of the picture signal scan frequency B of the dim signal scan frequency A and liquid crystal display panel of the backlight meets:
A > B, and A ≠ N*B, wherein N is the integer greater than 0；
Wherein, the dim signal sweep start time is later than the described image signal scanning starting time；
1/5* of the first start-up time of the backlight of the backlight after the liquid crystal of the liquid crystal display panel starts rotational instant
In the Tr time, wherein Tr switches the time rotated by the liquid crystal molecule of liquid crystal display panel between two pictures.
2. the method according to claim 1, wherein the dim signal sweep start time and described image are believed
Number sweep start time warping, the first start-up time of the backlight of the backlight terminate to revolve in the liquid crystal of the liquid crystal display panel
In the 1/5*Tr time before turning the moment, wherein Tr is switched between two pictures by the liquid crystal molecule of liquid crystal display panel to be revolved
The time turned.
3. method according to claim 1 or 2, which is characterized in that A > B+24HZ.
4. a kind of liquid crystal display for controlling liquid crystal display characterized by comprising
Starting module, for after liquid crystal display energization, starting the picture signal scanning and backlight of liquid crystal display panel
Dim signal scanning, the phase of the dim signal of the picture signal and backlight of the liquid crystal display panel are asynchronous；The backlight
The relationship of the picture signal scan frequency B of the dim signal scan frequency A and liquid crystal display panel of plate meets: A > B, and A ≠ N*
B, wherein N is the integer greater than 0；
Wherein, the dim signal sweep start time is later than the described image signal scanning starting time；
1/5* of the first start-up time of the backlight of the backlight after the liquid crystal of the liquid crystal display panel starts rotational instant
In the Tr time, wherein Tr switches the time rotated by the liquid crystal molecule of liquid crystal display panel between two pictures.
5. liquid crystal display according to claim 4, which is characterized in that the dim signal sweep start time with it is described
Picture signal sweep start time warping, liquid crystal of the first start-up time of the backlight of the backlight in the liquid crystal display panel
In the 1/5*Tr time before terminating rotational instant, wherein Tr is that the liquid crystal molecule of liquid crystal display panel is cut between two pictures
Change the rotated time.
6. liquid crystal display according to claim 4 or 5, which is characterized in that A > B+24HZ.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410855434.XA CN105810159B (en) | 2014-12-31 | 2014-12-31 | Liquid crystal display control method and liquid crystal display |
| PCT/CN2015/092270 WO2016107247A1 (en) | 2014-12-31 | 2015-10-20 | Liquid crystal display control method and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410855434.XA CN105810159B (en) | 2014-12-31 | 2014-12-31 | Liquid crystal display control method and liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105810159A CN105810159A (en) | 2016-07-27 |
| CN105810159B true CN105810159B (en) | 2019-01-01 |
Family
ID=56284152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410855434.XA Active CN105810159B (en) | 2014-12-31 | 2014-12-31 | Liquid crystal display control method and liquid crystal display |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105810159B (en) |
| WO (1) | WO2016107247A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048053B (en) * | 2020-01-03 | 2021-11-02 | Tcl华星光电技术有限公司 | Liquid crystal display device and driving method thereof |
| US20220122553A1 (en) * | 2021-12-24 | 2022-04-21 | Intel Corporation | Asynchronous control of a backlight for a liquid crystal display |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100767370B1 (en) * | 2001-08-24 | 2007-10-17 | 삼성전자주식회사 | Liquid crystal display, and method for driving thereof |
| JP3732775B2 (en) * | 2001-11-08 | 2006-01-11 | 株式会社東芝 | Liquid crystal display device and driving method of liquid crystal display device |
| CN100358002C (en) * | 2003-02-27 | 2007-12-26 | 奇美电子股份有限公司 | Apparatus and method for dynamically adjusting discontinuous modal switch frequency value of liquid crystal display |
| TW200630921A (en) * | 2005-02-24 | 2006-09-01 | Amtran Technology Co Ltd | Television and back lighting source module capable of preventing harmonic interference |
| TWI413090B (en) * | 2010-05-05 | 2013-10-21 | Au Optronics Corp | Backlight driving method and display |
| CN101826296B (en) * | 2010-05-20 | 2012-07-04 | 友达光电股份有限公司 | Backlight driving method and display unit |
| CN102800294B (en) * | 2012-09-04 | 2014-12-10 | 青岛海信电器股份有限公司 | Method for eliminating double images in backlight scanning and television |
-
2014
- 2014-12-31 CN CN201410855434.XA patent/CN105810159B/en active Active
-
2015
- 2015-10-20 WO PCT/CN2015/092270 patent/WO2016107247A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016107247A1 (en) | 2016-07-07 |
| CN105810159A (en) | 2016-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI475553B (en) | Backlight control module and backlight control method | |
| CN105336298B (en) | Liquid crystal display and its brightness adjusting method and device | |
| CN100365476C (en) | Liquid crystal display device and driving method thereof | |
| JP4271701B2 (en) | Liquid crystal display | |
| KR101329967B1 (en) | Back light unit and liquid crystal display device using the same and driving method thereof | |
| CN106205497B (en) | A kind of method for controlling backlight thereof, device and liquid crystal display device | |
| CN1248715A (en) | Liquid crystal driving device and liquid crystal device | |
| US20070126678A1 (en) | Liquid crystal display | |
| JP2007157685A (en) | Apparatus and method for driving inverter, and image display apparatus using same | |
| JP2009086133A (en) | Video display apparatus | |
| CN1716378A (en) | Apparatus and method for driving display optical device | |
| WO2017080189A1 (en) | Liquid crystal display device pink discoloration display control method and liquid crystal display device | |
| WO2019228308A1 (en) | Backlight control method and device, and display method and display device | |
| US8730149B2 (en) | Method for back light control and apparatus thereof | |
| US20190027107A1 (en) | Driving Method of Liquid Crystal Display Panel | |
| KR20090098656A (en) | Liquid crystal display driving device and driving method | |
| CN105810159B (en) | Liquid crystal display control method and liquid crystal display | |
| EP2472498A2 (en) | Method and apparatus for reducing power consumption in mobile terminal | |
| US10176766B2 (en) | Display driving method and apparatus and display device comprising the display driving apparatus | |
| US11183128B2 (en) | Liquid crystal display and display calibration method thereof | |
| Liu | Revolution of the TFT LCD technology | |
| CN103093727B (en) | Backlight control signal method of adjustment and device | |
| CN103778898A (en) | Dynamic dimming method of liquid crystal display LED backlight | |
| US20100231499A1 (en) | Method for driving lcd backlight modules | |
| US10535311B2 (en) | Displaying method and displaying apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |