CN109166553A - Liquid crystal display device and its driving method - Google Patents
Liquid crystal display device and its driving method Download PDFInfo
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- CN109166553A CN109166553A CN201811214592.1A CN201811214592A CN109166553A CN 109166553 A CN109166553 A CN 109166553A CN 201811214592 A CN201811214592 A CN 201811214592A CN 109166553 A CN109166553 A CN 109166553A
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- control signal
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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
- 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
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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
- 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
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
Abstract
The present invention relates to a kind of liquid crystal display device and its driving methods.Liquid crystal display device includes liquid crystal display panel, backlight module and control circuit, liquid crystal display panel includes n display area, backlight module includes n and the one-to-one backlight area in n display area, n is the natural number more than or equal to 2, each backlight area is used to provide backlight to a corresponding display area, control circuit is electrically connected liquid crystal display panel and backlight module, for successively scanning n display area and applying corresponding gray scale voltage signal shining to the n backlight area in n display area and control, in i-th of display area scanned period, i-th of display area is applied corresponding gray scale voltage signal, corresponding i-th of the backlight area in i-th of display area is closed, and the backlight area other than i-th of backlight area is opened, i is the natural number more than or equal to 1 and less than or equal to n.
Description
Technical field
The present invention relates to a kind of liquid crystal display device and its driving methods.
Background technique
With the development of science and technology flat display apparatus is widely used in various fields, especially liquid crystal display
Device, figure is frivolous, low power consumption and the advantageous characteristics such as radiationless because having, and gradually replaces conventional cathode ray tube
Display device, and be applied in the electronic product of numerous species, such as mobile phone, portable multimedia device, notebook electricity
Brain, LCD TV and LCD screen etc..However, causing liquid crystal display in display dynamic picture due to the retention performance of liquid crystal
Dynamic ghost (motion blur) phenomenon is also easy to produce when face.
Summary of the invention
A kind of liquid crystal display device comprising liquid crystal display panel, backlight module and control circuit, liquid crystal display panel packet
N display area is included, backlight module includes n and the one-to-one backlight area in n display area, and n is oneself more than or equal to 2
So number, each backlight area are used to provide backlight to a corresponding display area, and control circuit is electrically connected liquid crystal display panel
And backlight module, for successively scanning n display area and applying corresponding gray scale voltage signal to n display area and control
N backlight area processed shines, and in i-th of display area scanned period, i-th of display area is applied corresponding ash
Rank voltage signal, corresponding i-th of the backlight area in i-th of display area is closed, and the backlight area other than i-th of backlight area
It opens, i is the natural number more than or equal to 1 and less than or equal to n.
In one embodiment, n is the natural number more than or equal to 3.
In one embodiment, control circuit includes display signal conditioning unit, backlight signal adjusts unit, scanning is driven
Moving cell, data drive unit, display signal conditioning unit are used to generate according to original temporal control signal and export the first school
To scan drive cell and data drive unit, scan drive cell is used to correct timing control according to first positive timing control signal
Signal processed generates and is sequentially output scanning signal to scan n display area, and data drive unit is used for original data signal
It is converted to gray scale voltage signal and gray scale voltage signal is sequentially applied to n according to the first correction timing control signal control and show
Show region, backlight signal adjusts unit and is used to generate the first correction backlight control signal according to initial backlight control signal, and first
Correction backlight control signal is used to control shining for n backlight area of backlight module.
In one embodiment, original temporal control signal includes original level synchronization signal, the synchronous letter of original vertical
Number, at least one of original pixels clock signal, original enable signal, the first correction timing control signal includes first level
Synchronous correction signal, the first vertical synchronization correction signal, the first pixel clock correction signal, first correct in enable signal extremely
Few one kind；Initial backlight control signal includes pulse width signal, and the first correction backlight control signal includes the first pulse width
Correction signal.
In one embodiment, if the luminous intensity of the corresponding n backlight area of initial backlight control signal is in a frame
The display time of picture is the first intensity, and corresponding i-th of the backlight area of the first correction backlight control signal is shown at i-th
The luminous intensity of region scanned period is the second intensity, and the second intensity is greater than the first intensity, and initial backlight controls signal
Corresponding n backlight area is n corresponding in the luminous quantity of the display time of a frame picture and the first correction backlight control signal
Backlight area is equal in the luminous quantity of the display time of a frame picture.
In one embodiment, control circuit further includes control signal processing unit, and liquid crystal display device includes first
Display pattern and the second display pattern, control signal processing unit control liquid crystal display device enter the first display pattern or second
Display pattern controls signal processing unit control display signal conditioning unit and controls according to original temporal in the first display pattern
Signal generates and exports the first correction timing control signal to scan drive cell and data drive unit and control backlight letter
Number adjusting unit generates the first correction backlight control signal according to initial backlight control signal, and scan drive cell is according to the first school
Positive timing control signal generates and is sequentially output scanning signal to scan n display area, and data drive unit is by initial data
Signal, which is converted to gray scale voltage signal and corrects timing control signal control according to first, is sequentially applied to n for gray scale voltage signal
N backlight area of a display area, backlight module shines under the first correction backlight control signal control, wherein at i-th
Display area scanned period, i-th of display area are applied corresponding gray scale voltage signal, i-th of display area pair
I-th of the backlight area answered is closed, and the backlight area other than i-th of backlight area is opened；In the second display pattern, control
Signal processing unit control display signal conditioning unit generates according to original temporal control signal and exports the second correction timing control
Signal processed adjusts unit to scan drive cell and data drive unit and control backlight signal and is used for according to initial backlight control
Signal processed generates the second correction backlight control signal, and a frame picture display time is divided into the scanning period and maintains the period, scanning
Driving unit generates according to the second correction timing control signal in the scanning period and exports scanning signal successively to scan n display
Original data signal is converted to gray scale voltage signal and corrects timing control signal control according to second by region, data drive unit
Gray scale voltage signal is sequentially applied to n display area in the scanning period by system, and multi-strip scanning line is applied in the scanning period
After single pass signal, liquid crystal display device enters from the scanning period maintains the period, the second correction backlight control signal control back
N backlight area of optical mode group closes in the scanning period and the period is being maintained to open.
In one embodiment, the first display pattern is virtual reality display pattern, and the second display pattern is common aobvious
Show mode.
In one embodiment, control signal processing unit is for selection or default detecting condition based on user
Meet and generate first mode control signal and second mode control signal, and issues first mode control signal or second mode control
Signal processed to display signal conditioning unit and backlight signal adjusts unit to control display signal conditioning unit and backlight signal tune
Save unit.
In one embodiment, if the luminous intensity of the corresponding n backlight area of initial backlight control signal is in a frame
The display time of picture is the first intensity, and n backlight area of the corresponding backlight module of the second correction backlight control signal exists
The luminous intensity for maintaining the period is third intensity, and third intensity is greater than the first intensity, and initial backlight controls the corresponding n back of signal
Luminous quantity of the light region in the display time of a frame picture corrects the corresponding n backlight area of backlight control signal one with second
The luminous quantity of the display time of frame picture is equal.
A kind of driving method of liquid crystal display device, liquid crystal display device include the liquid crystal display with n display area
Panel and with the backlight module with the one-to-one backlight area in n display area, i-th of backlight area is used for corresponding
I-th of display area provides backlight, wherein n is the natural number more than or equal to 2, and i is the nature more than or equal to 1 and less than or equal to n
Number, driving method the following steps are included:
Control the 1st to i-1 backlight area, i+1 to n-th of backlight area opens luminous and i-th of backlight area pass
It closes；
Scanning signal is provided to i-th of display area；And
Apply corresponding gray scale voltage signal to i-th of display area.
In one embodiment, driving method the following steps are included:
The first display pattern control signal or the second display pattern control signal are exported,
Signal is controlled when exporting the first display pattern, controls the 1st to i-1 backlight area, i+1 to n-th of backlight area
It opens luminous and i-th of backlight area and closes in domain；Scanning signal is provided to i-th of display area；And it is applied to i-th of display area
Add corresponding gray scale voltage signal；
Signal is controlled when exporting the second display pattern, a frame picture display time is divided into the scanning period and maintains the period,
In the scanning period, output scanning signal successively scans n display area, gray scale voltage signal is sequentially applied to n
A display area, and n backlight area of control are closed,
The period is being maintained, n backlight area of control is opened simultaneously.
Compared to the prior art, in liquid crystal display device and its driving method of the present invention, by liquid crystal display panel and
Backlight module carries out subregion, so that in i-th of display area scanned period, i-th of display area is applied corresponding
Gray scale voltage signal, corresponding i-th of the backlight area in i-th of display area is closed, and the backlight area other than i-th of backlight area
It opens in domain, it is possible to reduce liquid crystal reduces the chance found by the external world in the reaction time sky window of rotation, and then it is residual to improve dynamic
Shadow phenomenon.
Detailed description of the invention
Fig. 1 is the frame structure schematic diagram of the liquid crystal display device of a better embodiment of the invention.
Fig. 2 is the schematic equivalent circuit of the liquid crystal display panel of liquid crystal display device shown in Fig. 1.
Fig. 3 is the planar structure schematic diagram of the backlight module of liquid crystal display device shown in Fig. 1.
Fig. 4 is a kind of schematic perspective view of embodiment of backlight module shown in Fig. 3.
Fig. 5 is the schematic perspective view of the embodiment of backlight module another kind shown in Fig. 3.
Fig. 6 is drive waveforms schematic diagram of the liquid crystal display device shown in Fig. 1 in the first display pattern.
Fig. 7 is drive waveforms schematic diagram of the liquid crystal display device shown in Fig. 1 in the second display pattern.
Fig. 8 is the flow chart of the driving method of the liquid crystal display device of a better embodiment of the invention.
Fig. 9 is a kind of partial structure diagram of the control circuit of embodiment of liquid crystal display device shown in Fig. 1.
Main element symbol description
Liquid crystal display device 10
Liquid crystal display panel 11
Backlight module 12
Control circuit 13
Control signal processing unit 131
Show signal conditioning unit 132
Backlight signal adjusts unit 133
Scan drive cell 134
Data drive unit 135
Timing control unit 136
Display area 110
Scan line 111
Data line 112
Pixel unit 113
Transistor 114
Liquid crystal capacitance 115
Backlight area 120
Light source 121,121 '
Optical diaphragm 122
Light guide plate 122 '
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Referring to Fig. 1, Fig. 1 is the frame structure schematic diagram of the liquid crystal display device 10 of an embodiment of the present invention.Liquid crystal
Display device 10 includes liquid crystal display panel 11, backlight module 12 and control circuit 13.Backlight module 12 is used for liquid crystal display
Panel 11 provides backlight, and liquid crystal display panel 11 is for receiving backlight and showing picture.Control circuit 13 is electrically connected liquid crystal display
Panel 11 and backlight module 12, luminous and liquid crystal display panel 11 the picture for controlling backlight module 12 are shown.
Control circuit 13 includes control signal processing unit 131, display signal conditioning unit 132, backlight signal adjusting list
First 133, scan drive cell 134, data drive unit 135.Control the electrical connection display Signal Regulation list of signal processing unit 131
Member 132 and backlight signal adjust unit 133.Show that signal conditioning unit 132 is electrically connected scan drive cell 134 and data-driven
Unit 135.Scan drive cell 134 and data drive unit 135 can be respectively scanning drive chip and data driving chip,
And electrical connection liquid crystal display panel 11.Backlight signal adjusts unit 133 and is electrically connected backlight module 12.
Liquid crystal display panel 11 includes n display area 110, and n is the natural number more than or equal to 2.The display area 1~n 110
It is arranged successively along the direction far from data drive unit 135.In an embodiment, n is the natural number more than or equal to 3, i.e. liquid
LCD panel 11 includes at least three display areas 110.
Referring to Fig. 2, Fig. 2 is the schematic equivalent circuit of the liquid crystal display panel 11 of liquid crystal display device 10 shown in Fig. 1.
Liquid crystal display panel 11 further include the scan line 111 of a plurality of parallel interval arrangement, the arrangement of a plurality of parallel interval and with scan line 111
Vertical data line 112 and intersect pixel list in the smallest rectangular area constituted with data line 112 positioned at scan line 111
Member 113.Scan line 111 intersects the pixel unit square that the multiple pixel units 113 defined constitute an array arrangement with data line 112
Battle array.
Each pixel unit 113 may include transistor 114 and liquid crystal capacitance 115, in present embodiment, transistor 114
It can be thin film transistor (TFT), grid connects corresponding scan line 111, and source electrode connects corresponding data line 112, drain electrode connection liquid crystal
Capacitor 115.
In present embodiment, each display area 110 is the rectangular strip area extended along the direction where scan line 111
Domain, and 1~n display area 110 is arranged successively along the direction where data line 112, each display area 110 can correspond to 1
Row, two rows or multirow pixel unit 113 can specifically be set according to actual needs.
Referring to Fig. 3, Fig. 3 is the planar structure schematic diagram of the backlight module 12 of liquid crystal display device 10 shown in Fig. 1.Backlight
Mould group 12 includes n and the n one-to-one backlight area 120 in display area 110, each backlight area 120 can positioned at pair
The underface of a display area 110 is answered, for providing backlight to a corresponding display area 110, wherein each backlight area
The light emission luminance in domain 120 and open and close can also be controlled individually.Backlight module 12 can be down straight aphototropism mode set, can also be with
For side entrance back module, can specifically be selected according to actual needs.
Referring to Fig. 4, Fig. 4 is a kind of schematic perspective view of embodiment of backlight module 12 shown in Fig. 3.In embodiment,
Backlight module 12 is down straight aphototropism mode set comprising the light source 121 of multiple array arrangements and above multiple light sources 121
Optical diaphragm 122.Light source 121 can be white light LEDs but is not limited with above-mentioned.Light source diaphragm 121 can for a piece of, two panels or
Multi-disc, and can be selected according to actual needs with diffusion sheet, light guide plate etc..Wherein, the corresponding light of each backlight area 120
The light source 121 corresponding with other backlight areas 120 of source 121 can be electrically connected it is upper mutually indepedent so that each backlight area 120
Corresponding light source 121 can be independently controlled light emission luminance, open or close, so that each backlight area 120 shines
Brightness, unlatching, closing can be independently controlled.
Referring to Fig. 5, Fig. 5 is the schematic perspective view of another embodiment of backlight module 12 shown in Fig. 3.Embodiment
In, backlight module 12 is side entrance back module comprising light guide plate 122 ', multiple straight lines are arranged in 122 ' side of light guide plate
Light source 121 '.Light source 121 ' can be white light LEDs but is not limited with above-mentioned.Expansion can be further arranged in 122 ' top of light guide plate
Discrete piece, blast piece etc., herein without repeating.In embodiment, the corresponding light source 121 ' of each backlight area 120 and other backlights
The corresponding light source 121 ' in region 120 can be mutually indepedent, so that the corresponding light source 121 ' of each backlight area 120 can be independent
Control light emission luminance opens or closes, so that the light emission luminance of each backlight area 120, unlatching, closing can be independent
Control.
In present embodiment, liquid crystal display device 10 includes the first display pattern and the second display pattern, is controlled at signal
Reason unit 131 can control liquid crystal display device 10 and enter the first display pattern or the second display pattern.First display pattern can
Think that virtual reality display pattern, the second display pattern can be general display mode.Controlling signal processing unit 131 can be with base
First mode control signal is generated in the selection of user or the satisfaction of default detecting condition and second mode controls signal, concurrently
First mode control signal or second mode control signal to display signal conditioning unit 132 and backlight signal adjust unit out
133 adjust unit 133 with control display signal conditioning unit 132 and backlight signal.Wherein, user can be shown by manipulation
Menu or button select the first display pattern or the second display pattern, generate to control signal processing unit 131 and export the
One mode control signal and second mode control signal.
Default detecting condition can be the variation for detecting the received image data format of control circuit 13, such as common display
Data are different from the virtual display data format of data, it can first mode control letter is generated by detecting data format
Number or second mode control signal.Default detecting condition, which can be, detects preset gesture, movement or touch action etc., from
And first mode control signal or second mode control letter are generated according to different preset gesture, movement or touch action
Number.However, being above exemplary illustration, default detecting adjusts and can also be set as other according to actual needs, not more than
It states and is limited.
Referring to Fig. 6, Fig. 6 is drive waveforms schematic diagram of the liquid crystal display device 10 shown in Fig. 1 in the first display pattern.Such as
Fig. 6 (a) and (c), when liquid crystal display device 10 enters the first display pattern, i.e. control signal processing unit 131 issues the first mould
Formula controls signal to display signal conditioning unit 132 and backlight signal and adjusts unit 133, shows 132 foundation of signal conditioning unit
Original temporal control signal generates and exports the first correction timing control signal to scan drive cell 134 and data drive unit
135。
Backlight signal adjusts unit 133 and generates the first correction backlight control signal according to initial backlight control signal.Scanning
Driving unit 134 generates according to the first correction timing control signal and is sequentially output scanning signal to scan line 111 to scan n
Display area 110.Original data signal is converted to gray scale voltage signal and corrects timing according to first by data drive unit 135
Gray scale voltage signal is sequentially applied to the data line 112 of n display area 110 by control signal control, and transistor 114 is opened,
Liquid crystal capacitance 115 is written in gray scale voltage signal, and the n backlight area 120 of backlight module 12 corrects backlight control signal first
Control is lower to shine.
In the first display mode, the scan line scanned period i-th of display area 110, i-th of viewing area
The data line in domain 110 is applied corresponding gray scale voltage signal, i-th of corresponding i-th of backlight area 120 in display area 110
It closes, and the backlight area 120 other than i-th of backlight area 120 is opened, i is the nature more than or equal to 1 and less than or equal to n
Number.
It includes original level synchronization signal (H-sync), original vertical synchronization signal (V- that original temporal, which controls signal,
Sync), at least one of original pixels clock signal (V-CLK), original enable signal (OE).First correction timing control letter
Number include first level synchronous correction signal, the first vertical synchronization correction signal, the first pixel clock correction signal, first correction
At least one of enable signal.Fig. 6 (a) and (c) in mainly with original temporal control signal include original vertical synchronization signal
V-sync and the first vertical synchronization correction signal V-sync1 are illustrated.
Horizontal synchronizing signal is used to control the timing of the scanning signal being applied in scan line 111, in present embodiment, the
One horizontal synchronization correction signal can be to be corrected to obtain to original level synchronization signal.Original level synchronization signal is corresponding
The width (high level lasting time in other words, i.e. gate on time) for being applied to the scanning signal of every scan line 111 is greater than the
One corrects the width of the corresponding scanning signal for being applied to every scan line 111 of horizontal synchronizing signal and is applied to every data
Gray scale voltage signal width on line 112, so that liquid is written in the opening time of each transistor 114 and gray scale voltage signal
The time of brilliant capacitor 114 is reduced；Accordingly, the first vertical synchronization correction signal V-sync1 is believed via to vertical-horizontal is synchronous
Number V-sync is corrected to obtain.It in one embodiment, can be by the way of digital modulation to the vertical water of number format
Flat synchronization signal V-sync modifies to be corrected to the first vertical synchronization correction signal V-sync1.Certainly, another
In kind embodiment, if vertical-horizontal synchronization signal V-sync is analog signal format, corresponding logic switch electricity can also be passed through
Road vertical-horizontal synchronization signal V-sync as shown in Fig. 6 (a) is corrected to the synchronous letter of the first vertical-horizontal as shown in 6 (b)
Number V-sync1.
The display time T1 of the corresponding frame picture of original vertical synchronization signal V-sync is greater than the first correction vertical synchronization
The display time T2 of the corresponding frame picture of signal V-sync1, so that the initial time of every frame picture and end time change,
Original vertical synchronization signal V-sync need to be corrected to the first vertical synchronization correction signal V-sync1.Based on horizontal synchronizing signal
And the variation of vertical synchronizing signal, pixel clock signal and enable signal also need accordingly to adjust, it therefore, can be according to practical need
It wants, generates the first pixel clock correction signal according to original pixels clock signal, and generate first according to original enable signal
Correct enable signal.
Shown in such as Fig. 6 (b) and (d), initial backlight control signal may include original pulse width signal (PWM), and first
Correcting backlight control signal includes the first pulse width correction signal (New PWM 1), the first pulse width correction signal New
PWM 1 can also be corrected to obtain to original pulse width signal PWM, wherein by adjusting the first pulse width correction letter
The electric current of the adjustable light source for being applied to backlight module of frequency, duty ratio of number NewPWM 1, to control backlight module 12
Each backlight area 120 brightness and switch.
If initial backlight controls display time of the luminous intensity in a frame picture of the corresponding n backlight area 120 of signal
T1 is the first intensity, and in the first display mode, corresponding i-th of the backlight area of the first correction backlight control signal is i-th
The luminous intensity of the scanned period Ts in a display area 110 is the second intensity, wherein the second intensity is greater than the first intensity,
But to guarantee that accurate reproduction shows data and brightness, initial backlight controls the corresponding n backlight area 120 of signal in a frame
The luminous quantity of the display time T1 of picture n backlight area 120 corresponding with the first correction backlight control signal is in a frame picture
Display time T2 luminous quantity it is of substantially equal.
Since the light source of backlight module 12 is electric current driving, the luminous intensity of n backlight area 120 and n backlight area
The driving current intensity of 120 light source is consistent, therefore, if the driving of the corresponding n backlight area 120 of initial backlight control signal
Current strength (BLU) is the first current strength in the display time of a frame picture, in the first display mode, the first correction back
Corresponding i-th of the backlight area 120 of optical control signal is strong in the driving current of i-th of scanned period of display area 110
Spending (New BLU 1) is the second current strength, and the second current strength is greater than the first current strength.To guarantee that accurate reproduction shows number
According to and brightness, initial backlight control the corresponding n backlight area 120 of signal in the power consumption for showing time T1 of a frame picture
Measure the power consumption of display time of the n backlight area 120 corresponding with the first correction backlight control signal in a frame picture T2
It measures of substantially equal.
Referring to Fig. 7, Fig. 7 is drive waveforms schematic diagram of the liquid crystal display device 10 shown in Fig. 1 in the second display pattern.Such as
Fig. 7 (a) and (c) shown in, when liquid crystal display mode 10 enters the second display pattern, i.e. control signal processing unit 131 issues the
Two modes control signal to display signal conditioning unit 132 and backlight signal and adjust unit 133.Show signal conditioning unit 132
It generates according to original temporal control signal and exports the second correction timing control signal to scan drive cell 134 and data-driven
Unit 135.It controls backlight signal and adjusts unit 133 according to initial backlight control signal generation the second correction backlight control signal.
Under second display pattern, a frame picture display time is divided into scanning period t1 and maintains period t2, turntable driving
Unit 134 generates according to the second correction timing control signal in scanning period t1 and exports scanning signal and shown with successively scanning n
Show region 110, original data signal is converted to gray scale voltage signal and corrects timing control according to second by data drive unit 135
Gray scale voltage signal is sequentially applied to n display area in scanning period t1 by signal control processed, and transistor 114 is opened, grayscale
Liquid crystal capacitance 115 is written in voltage signal.
Multi-strip scanning line 111 is after scanning period t1 is applied single pass signal, and liquid crystal display device 10 is from scanning
Period t1, which enters, maintains period t2, and the n backlight area 120 of the second correction backlight control signal control backlight module 12 is scanning
Period t1 closes and period t2 is being maintained to open.
As before, original temporal control signal include original level synchronization signal, it is original vertical synchronization signal V-sync, original
At least one of pixel clock signal, original enable signal, the second correction timing control signal includes the second horizontal synchronization school
Positive signal, the second vertical synchronization correction signal V-sync2, the second pixel clock correction signal, second correct in enable signal
It is at least one.Fig. 7 (a) and (c) in mainly with original temporal control signal include original vertical synchronization signal V-sync and first
Vertical synchronization correction signal V-sync2 is illustrated.
In present embodiment, the second horizontal synchronization correction signal, which can be, is corrected original level synchronization signal
It arrives, the width (gate on time) of the corresponding scanning signal for being applied to every scan line 111 of original level synchronization signal is greater than
Second corrects the width of the corresponding scanning signal for being applied to every scan line 111 of horizontal synchronizing signal and is applied to every number
According to the gray scale voltage signal width on line 112, so that the opening time of each transistor 114 and the write-in of gray scale voltage signal
The time of liquid crystal capacitance is reduced.
Second vertical synchronization correction signal is corrected to obtain with Relative vertical horizontal synchronizing signal, the synchronous letter of original vertical
The display time of number corresponding frame picture of V-sync is greater than the corresponding frame picture of the second correction vertical synchronizing signal V-sync2
The display time original vertical synchronization signal need to be corrected to so that the initial time of every frame picture and end time change
Second vertical synchronization correction signal.Variation based on horizontal synchronizing signal and vertical synchronizing signal, pixel clock signal and enabled
Signal also needs accordingly to adjust, and therefore, can generate the second pixel clock school according to original pixels clock signal according to actual needs
Positive signal, and the second correction enable signal is generated according to original enable signal.
Initial backlight control signal may include original pulse width signal (PWM), the second correction backlight control signal packet
It includes the second pulse width correction signal (New PWM 2), the second pulse width correction signal New PWM 2 can also be to original arteries and veins
It rushes width signal PWM to be corrected to obtain, wherein can be with by adjusting the frequency of the second pulse width correction signal, duty ratio
Adjustment is applied to the electric current of the light source of backlight module 12, to control the brightness of each backlight area 120 of backlight module and open
It closes.
Shown in such as Fig. 7 (c) and (d), initial backlight controls the luminous intensity of the corresponding n backlight area 120 of signal one
The display time of frame picture is the first intensity, n backlight area of the corresponding backlight module 12 of the second correction backlight control signal
Domain 120 is third intensity in the luminous intensity for maintaining the period, and third intensity is greater than the first intensity, and it is corresponding that initial backlight controls signal
N backlight area 120 a frame picture display time T1 luminous quantity and the second corresponding n of correction backlight control signal it is a
Luminous quantity of the backlight area in the display time T3 of a frame picture is equal.
Since the light source of backlight module 12 is electric current driving, the luminous intensity of n backlight area 120 and n backlight area
The driving current intensity of 120 light source is consistent, and therefore, initial backlight controls the driving electricity of the corresponding n backlight area 120 of signal
Intensity of flow (BLU) is the first current strength in the display time of a frame picture, in the second display mode, the second correction backlight
It is that third electric current is strong that the corresponding n backlight area 120 of signal, which is controlled, in the driving current intensity (New BLU 2) for maintaining period t2
Degree, third current strength are greater than the first current strength.To guarantee that accurate reproduction shows data and brightness, initial backlight controls signal
Power consumption of the corresponding n backlight area in the display time T1 of a frame picture is corresponding with the second correction backlight control signal
N backlight area 120 a frame picture display time T3 power consumption it is of substantially equal.
Referring to Fig. 8, Fig. 8 is the flow chart of the driving method of liquid crystal display device 10 shown in Fig. 1.Driving method can wrap
Include following steps S1, S2 and S3.
Step S1, the 1st to i-1 backlight area of control, i+1 to n-th of backlight area open luminous and i-th of backlight
Region is closed.
In step S1, can by backlight signal adjust unit 133 output first correction backlight control signal control the 1st to
I-1 backlight area 110, i+1 to n-th of backlight area 110 are opened luminous and i-th of backlight area 110 and are closed.
Specifically, the n backlight area 120 of backlight module 12 shines under the control of the first correction backlight control signal,
Wherein, the 1st to i-1 backlight area, i+1 to n-th of backlight area are opened luminous and i-th of backlight area and are closed.Step
S2 provides scanning signal to i-th of display area.
Step S2 can be executed by scan drive cell 134.
Specifically, scan drive cell 134 can generate according to the first correction timing control signal and be sequentially output scanning
Signal scans n display area 110 to scan line 111.
Step S3 applies corresponding gray scale voltage signal to i-th of display area.
Step S3 can be executed by data drive unit 135.Original data signal is converted to ash by data drive unit 135
Gray scale voltage signal is simultaneously sequentially applied to i-th of display area according to the first correction timing control signal control by rank voltage signal
110 data line 112, transistor 114 are opened, and liquid crystal capacitance 115 is written in gray scale voltage signal.
Driving method can also include step S4, the first display pattern of output control signal or the second display pattern control letter
Number, when liquid crystal display device 10 enters the first display pattern, control signal processing unit 131 also issues first mode control signal
Unit 133 is adjusted to display signal conditioning unit 132 and backlight signal, shows signal conditioning unit 132 according to original temporal control
Signal processed generates and exports the first correction timing control signal to scan drive cell 134 and data drive unit 135, backlight letter
Number adjust unit 133 according to initial backlight control signal generate first correction backlight control signal.When exporting the first display pattern
Signal is controlled, liquid crystal display device executes above step S1, S2 and S3；Signal is controlled when exporting the second display pattern, a frame is drawn
Face shows that the time is divided into scanning period t1 and maintains period t2, and liquid crystal display device executes following steps S5, S6.
Step S5, in scanning period t1, output scanning signal successively scans n display area 110, by gray scale voltage signal
It is sequentially applied to n display area 110, and n backlight area 120 of control is closed.Specifically, scan drive cell 134 is defeated
Scanning signal successively scans n display area 110 out, and gray scale voltage signal is sequentially applied to n and shown by data drive unit 135
Show that region 110 and backlight signal adjust unit 133 and control the n closing of backlight area 120.
Step S6 is maintaining period t2, and n backlight area 120 of control is opened simultaneously.Specifically, backlight signal adjusts single
133 n backlight area 120 of control of member is closed.
In step S6, period t2 is maintained, scan drive cell 134 and data drive unit 135 can not be to liquid crystal displays
Panel 110 applies scanning signal and gray scale voltage signal, to keep transistor 114 to close, in addition, n backlight area 120 is closed
Closing can also be controlled by backlight regulation unit 133.
In one embodiment, as shown in figure 9, control circuit 13 can also include timing control unit 136, timing control list
Member can be electrically connected display signal conditioning unit 132, backlight signal adjusts unit 133, scan drive cell 134, data-driven
Unit 135, timing control unit can receive raw image data and decompress to raw image data, and when generating original
Sequence control signal, initial backlight control signal and original data signal etc., and corresponding signal is provided to display Signal Regulation
Unit 132, backlight signal adjust unit 133, scan drive cell 134, data drive unit 135 etc..
In a kind of change embodiment, liquid crystal display device 10 can also only have the first display pattern, as completely
Suitable for virtual real mode or the liquid crystal display mode of other high frequency display patterns, at this point, liquid crystal display device 10 can be with
It is not provided with control signal processing unit, does not need to carry out pattern switching, need to only show signal conditioning unit 132, backlight signal tune
Section unit 133, scan drive cell 134, data drive unit 135 cooperate the associated drives control for directly executing the second display pattern
System；Corresponding, driving method mainly includes step S1, S2 and S3, that is, can not include step S4, S5 and S6 etc..
In liquid crystal display device 10 and its driving method of the present invention, by liquid crystal display panel 11 and backlight module 12 into
Row subregion, so that i-th of scanned period of display area 110, i-th of display area 110 is applied corresponding grayscale
Voltage signal, i-th of corresponding i-th of backlight area 120 in display area 110 are closed, and other than i-th of backlight area 120
Backlight area 120 is opened, it is possible to reduce liquid crystal rotation reaction time sky window, and then improve dynamic ghost phenomena.
Liquid crystal display device 10 includes two display patterns, in the first display mode, can by display area 110 and
The zonal control of backlight area 120 improves dynamic ghost phenomena, in the second display mode, by by a frame picture display time
T is divided into scanning period t1 and maintains period t2, all closes the n backlight area 120 of backlight module 12 in scanning period t1,
It is maintaining period t2 to be switched on the n backlight area 120 of backlight module 12, liquid crystal can also be reduced in the reaction time of rotation
Empty window, and then improve dynamic ghost phenomena.In addition, the design of two display patterns can also allow user voluntarily according to need into
Row switching, thus in the case where being also easy to produce the virtual reality display pattern of dynamic ghost phenomena, by liquid crystal display panel 11 and back
Optical mode group 12 carries out zonal control, improves dynamic ghost phenomena, so that under virtual reality display pattern, liquid crystal display device 10
With preferable display effect.
Pass through the hair of the n backlight area 120 of first and second correction adjustable backlight module 12 of backlight control signal
Luminous intensity, switch period, so that display time of the corresponding n backlight area 120 of initial backlight control signal in a frame picture
Display time T2 of the luminous quantity of the T1 n backlight area corresponding with first or second correction backlight control signal in a frame picture
Or the luminous quantity of T3 is equal, and then ensures that backlight module 12 provides accurate light quantity to liquid crystal display panel 11, thus liquid crystal
Show that panel 11 there can be preferable display effect with the corresponding picture of accurate reproduction raw image data, liquid crystal display device 10,
And since the second display pattern can also can achieve compared with the first display pattern power saving, by the design of pattern switching
Technical effect of two display patterns compared with power saving.
Certainly, the invention is not limited to embodiment disclosed above, the present invention, which can also be, carries out above-described embodiment
Various changes.As long as those skilled in the art is appreciated that within spirit of the invention, to above embodiments institute
The appropriate change and variation made all are fallen within the scope of protection of present invention.
Claims (10)
1. a kind of liquid crystal display device, it is characterised in that: the liquid crystal display device include liquid crystal display panel, backlight module and
Control circuit,
The liquid crystal display panel includes n display area, the backlight module include n with the n display area one by one
Corresponding backlight area, n are the natural number more than or equal to 2, and each backlight area is used to provide to a corresponding display area
Backlight,
The control circuit is electrically connected the liquid crystal display panel and backlight module, for successively scanning the n display area
And apply corresponding gray scale voltage signal to the n display area and control shining for the n backlight area,
In i-th of display area scanned period, i-th of display area is applied corresponding gray scale voltage signal,
Corresponding i-th of the backlight area in i-th of display area is closed, and the backlight area other than i-th of backlight area is equal
It opens, i is the natural number more than or equal to 1 and less than or equal to n.
2. liquid crystal display device as described in claim 1, it is characterised in that: the control circuit includes display Signal Regulation list
Member, backlight signal adjust unit, scan drive cell, data drive unit,
The display signal conditioning unit is used to generate according to original temporal control signal and exports the first correction timing control letter
Number to the scan drive cell and the data drive unit,
The scan drive cell be used for according to it is described first correction timing control signal generate and be sequentially output scanning signal with
The n display area is scanned,
The data drive unit is used to original data signal is converted to the gray scale voltage signal and according to first school
The gray scale voltage signal is sequentially applied to the n display area by positive timing control signal control,
The backlight signal adjusts unit and is used to generate the first correction backlight control signal according to initial backlight control signal, described
First correction backlight control signal is used to control shining for n backlight area of the backlight module.
3. liquid crystal display device as claimed in claim 2, it is characterised in that: the original temporal control signal includes initial condition
At least one of flat synchronization signal, original vertical synchronization signal, original pixels clock signal, original enable signal, described
One correction timing control signal includes first level synchronous correction signal, the first vertical synchronization correction signal, the first pixel clock
At least one of correction signal, first correction enable signal；The initial backlight control signal includes pulse width signal, institute
Stating the first correction backlight control signal includes the first pulse width correction signal.
4. liquid crystal display device as claimed in claim 2, it is characterised in that: set the corresponding institute of the initial backlight control signal
It is the first intensity that the luminous intensity of n backlight area, which is stated, in the display time of a frame picture, the first correction backlight control
Luminous intensity of corresponding i-th of the backlight area of signal in i-th of display area scanned period is the second intensity, described
Second intensity is greater than first intensity, and the initial backlight controls the corresponding n backlight area of signal in a frame picture
The luminous quantity of display time correct the corresponding n backlight area of backlight control signal in a frame picture with described first
Show that the luminous quantity of time is equal.
5. liquid crystal display device as claimed in claim 2, it is characterised in that: the control circuit further includes control signal processing
Unit, the liquid crystal display device include the first display pattern and the second display pattern, the control signal processing unit control
The liquid crystal display device enters first display pattern or second display pattern,
In first display pattern, the control signal processing unit control the display signal conditioning unit according to it is original when
Sequence control signal generates and exports the first correction timing control signal to the scan drive cell and the data drive unit
And the control backlight signal adjusts unit and generates the first correction backlight control signal according to initial backlight control signal,
The scan drive cell according to it is described first correction timing control signal generate and be sequentially output the scanning signal with
The n display area is scanned, the original data signal is converted to the gray scale voltage signal by the data drive unit
And the gray scale voltage signal is sequentially applied to the n viewing area according to the first correction timing control signal control
The n backlight area in domain, the backlight module shines under the first correction backlight control signal control, wherein at i-th
Display area scanned period, i-th of display area are applied corresponding gray scale voltage signal, and described i-th aobvious
Show that corresponding i-th of the backlight area in region is closed, and the backlight area other than i-th of backlight area is opened；
In second display pattern, the control signal processing unit control the display signal conditioning unit according to it is original when
Sequence control signal generates and exports the second correction timing control signal to the scan drive cell and the data drive unit
And the control backlight signal adjusts unit and is used to generate the second correction backlight control signal according to initial backlight control signal,
One frame picture display time is divided into the scanning period and maintains the period, and the scan drive cell is in the scanning period according to institute
The second correction timing control signal is stated to generate and export the scanning signal successively to scan the n display area, the number
The original data signal is converted into the gray scale voltage signal according to driving unit and corrects timing control according to described second
The gray scale voltage signal is sequentially applied to the n display area in the scanning period by signal control, described a plurality of to sweep
Line is retouched after the scanning period is applied single pass signal, the liquid crystal display device enters dimension from the scanning period
It holds the period, the n backlight area that the second correction backlight control signal controls the backlight module is closed in the scanning period
It closes and is opened in the maintenance period.
6. liquid crystal display device as claimed in claim 5, it is characterised in that: first display pattern is that virtual reality is shown
Mode, second display pattern are general display mode.
7. liquid crystal display device as claimed in claim 5, it is characterised in that: the control signal processing unit is used to be based on to make
The satisfaction of the selection of user or default detecting condition generates first mode control signal and second mode controls signal, and issues institute
It states first mode control signal or the second mode controls signal to the display signal conditioning unit and the backlight signal
Unit is adjusted to control the display signal conditioning unit and the backlight signal and adjust unit.
8. liquid crystal display device as claimed in claim 5, it is characterised in that: set the corresponding institute of the initial backlight control signal
It is the first intensity that the luminous intensity of n backlight area, which is stated, in the display time of a frame picture, the second correction backlight control
N backlight area of the corresponding backlight module of signal is third intensity in the luminous intensity for maintaining the period, and the third is strong
Degree is greater than first intensity, and the initial backlight controls the corresponding n backlight area of signal in the display of a frame picture
The luminous quantity of the time n backlight area corresponding with the second correction backlight control signal is in the display of a frame picture
Between luminous quantity it is equal.
9. a kind of driving method of liquid crystal display device, it is characterised in that: the liquid crystal display device includes having n viewing area
The liquid crystal display panel in domain and with the backlight module with the one-to-one backlight area in n display area, i-th of backlight area
For providing backlight to corresponding i-th of display area, wherein n is the natural number more than or equal to 2, and i is more than or equal to 1 and small
In be equal to n natural number, the driving method the following steps are included:
Control the 1st to i-1 backlight area, i+1 to n-th of backlight area is opened luminous and i-th of backlight area and closed；
Scanning signal is provided to i-th of display area；And
Apply corresponding gray scale voltage signal to i-th of display area.
10. the driving method of liquid crystal display device as claimed in claim 9, it is characterised in that: the driving method include with
Lower step:
The first display pattern control signal or the second display pattern control signal are exported,
Signal is controlled when exporting first display pattern, controls the 1st to i-1 backlight area, i+1 to n-th of backlight area
It opens luminous and i-th of backlight area and closes in domain；Scanning signal is provided to i-th of display area；And it is applied to i-th of display area
Add corresponding gray scale voltage signal；
Signal is controlled when exporting second display pattern, a frame picture display time is divided into the scanning period and maintains the period,
In the scanning period, exports scanning signal and successively scan the n display area, gray scale voltage signal is sequentially applied
It is closed to the n display area, and the control n backlight area,
In the maintenance period, controls the n backlight area while opening.
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| CN201811214592.1A CN109166553B (en) | 2018-10-18 | 2018-10-18 | Liquid crystal display device and driving method thereof |
| TW107137843A TWI680446B (en) | 2018-10-18 | 2018-10-25 | Liquid crystal display device and driving methed thereof |
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| CN201811214592.1A CN109166553B (en) | 2018-10-18 | 2018-10-18 | Liquid crystal display device and driving method thereof |
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Also Published As
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| TW202016913A (en) | 2020-05-01 |
| TWI680446B (en) | 2019-12-21 |
| CN109166553B (en) | 2021-01-29 |
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