CN106157908A - Generating circuit from reference voltage and reference voltage generating method, control chip - Google Patents
Generating circuit from reference voltage and reference voltage generating method, control chip Download PDFInfo
- Publication number
- CN106157908A CN106157908A CN201610513127.2A CN201610513127A CN106157908A CN 106157908 A CN106157908 A CN 106157908A CN 201610513127 A CN201610513127 A CN 201610513127A CN 106157908 A CN106157908 A CN 106157908A
- Authority
- CN
- China
- Prior art keywords
- reference voltage
- frame
- difference
- frame rate
- frame frequency
- 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.)
- Granted
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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The open a kind of generating circuit from reference voltage of the present invention and production method, control chip, relate to Display Technique field, for producing matched reference voltage according to different synchronization frame frequencies.Wherein, generating circuit from reference voltage includes: difference computational unit, for obtaining anchor-frame frequency and the synchronization frame frequency of successive frame from time schedule controller, calculates the synchronization frame frequency of present frame and the frame rate difference of anchor-frame frequency；Search unit, in searching unit, store multiple frame rate difference and the one-to-one relationship of multiple reference voltage difference, for finding out the reference voltage difference corresponding with calculated frame rate difference according to this corresponding relation；Reference voltage computing unit, for the reference voltage difference value fixed reference potential matched with anchor-frame frequency and lookup obtained, obtains the reference voltage that the synchronization frame frequency with present frame matches.Described generating circuit from reference voltage carries out showing required reference voltage for producing display.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of generating circuit from reference voltage and reference voltage generation side
Method, control chip.
Background technology
(Thin Film Transistor-Liquid Crystal Display, tft liquid crystal shows TFT-LCD
Show device) as the display of current main flow, it is widely used on the display devices such as TV, computer and scialyscope.
Need during the driving of TFT-LCD a reference voltage as the reference of all output voltages, in prior art
The reference voltage of TFT-LCD produces generally according to anchor-frame frequency (generally 60Hz), and therefore produced reference voltage is one
Fixing voltage.It is to say, synchronization frame frequency (the actual frame frequency produced during i.e. driving of each frame during no matter driving
Rate) whether equal to anchor-frame frequency, the reference voltage of TFT-LCD is all changeless.Generation due to above-mentioned reference voltage
Mode does not consider whether the synchronization frame frequency of each frame mates with reference voltage, and this will be to (the Thin Film of TFT in TFT-LCD
Transistor, thin film transistor (TFT)) charge condition impact, such as, when synchronization frame frequency is more than anchor-frame frequency, lead
Causing TFT undercharge, on the contrary, when synchronization frame frequency is less than anchor-frame frequency, cause TFT to be overcharged with electricity, above two is tied
Fruit all can cause the display of TFT-LCD extremely.
Summary of the invention
It is an object of the invention to provide a kind of generating circuit from reference voltage and reference voltage generating method, control chip,
For producing matched different reference voltage according to different synchronization frame frequencies, meet TFT at different synchronization frame frequencies
Charging requirement under rate, makes TFT-LCD normally show.
To achieve these goals, the present invention provides following technical scheme:
A first aspect of the present invention provides a kind of generating circuit from reference voltage, described generating circuit from reference voltage and display
The time schedule controller of device is connected, and described generating circuit from reference voltage includes: difference computational unit, and described difference computational unit is used for
From described time schedule controller, obtain anchor-frame frequency and the synchronization frame frequency of successive frame, according to the anchor-frame frequency got and
The synchronization frame frequency of successive frame, calculates the synchronization frame frequency of present frame and the frame rate difference of anchor-frame frequency；With described difference
The lookup unit that computing unit is connected, stores multiple frame rate difference and multiple reference voltage difference in described lookup unit
One-to-one relationship, described lookup unit is corresponding with calculated frame rate difference for finding out according to this corresponding relation
Reference voltage difference；The reference voltage computing unit being connected with described lookup unit, described reference voltage computing unit is used for
By the fixed reference potential matched with described anchor-frame frequency with search the reference voltage difference value that obtains, obtain with currently
The reference voltage that the synchronization frame frequency of frame matches.
Generating circuit from reference voltage provided by the present invention, is calculated the synchronization frame of present frame by difference computational unit
Frequency and the frame rate difference of anchor-frame frequency, then according to searching multiple frame rate differences of element memory storage and multiple reference
The one-to-one relationship of voltage difference, finds the reference voltage difference corresponding with being calculated frame rate difference, leads to afterwards
Cross reference voltage computing unit by the fixed reference potential corresponding to anchor-frame frequency and the reference voltage difference value that finds,
Obtain the reference voltage that the synchronization frame frequency with present frame matches, it is achieved thereby that according to different synchronization frame frequencies matchingly
The purpose of different reference voltages is set, it is ensured that the reference voltage that each frame is exported is satisfied by the charging requirement of TFT, it is to avoid
The TFT undercharge caused owing to reference voltage does not mates with synchronization frame frequency or the problem overcharged so that display shows
Show normal.
A second aspect of the present invention provides a kind of reference voltage generating method, and described reference voltage generating method includes:
Step S1: according to the synchronization frame frequency of anchor-frame frequency and successive frame, calculate the synchronization frame frequency of present frame and described anchor-frame
The frame rate difference of frequency；Step S2: according to multiple frame rate differences and the one-to-one relationship of multiple reference voltage difference, look into
Find out the reference voltage difference corresponding with calculated frame rate difference；Step S3: will be with described anchor-frame frequency phase
The reference voltage difference value that the fixed reference potential joined and lookup obtain, obtains what the synchronization frame frequency with present frame matched
Reference voltage.
The beneficial effect of the reference voltage generating method that a second aspect of the present invention provides is provided with above-mentioned first aspect
The beneficial effect of generating circuit from reference voltage identical, do not repeat them here.
A third aspect of the present invention provides a kind of control chip, described control chip include the time schedule controller that is connected and
Generating circuit from reference voltage, described generating circuit from reference voltage is that the reference voltage mentioned by a first aspect of the present invention produces electricity
Road.
The reference electricity that the beneficial effect of the control chip that a third aspect of the present invention provides and above-mentioned first aspect are provided
The beneficial effect that pressure produces circuit is identical, does not repeats them here.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this
Bright schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.
In the accompanying drawings:
Fig. 1 is the structural representation one of the generating circuit from reference voltage in the embodiment of the present invention one；
Fig. 2 is the structural representation two of the generating circuit from reference voltage in the embodiment of the present invention one；
Fig. 3 is the structural representation of the corresponding relation signal generating unit in the embodiment of the present invention one；
Fig. 4 is the flow chart of the reference voltage generating method in the embodiment of the present invention two；
Fig. 5 is the structural representation of the control chip in the embodiment of the present invention three.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is a part of embodiment of the present invention rather than whole embodiments wholely.Based on this
Embodiment in bright, the every other enforcement that those of ordinary skill in the art are acquired under not making creative work premise
Example, broadly falls into the scope of protection of the invention.
Embodiment one
As it is shown in figure 1, the present embodiment provides a kind of generating circuit from reference voltage 2, this generating circuit from reference voltage 2 with
The time schedule controller 1 of display is connected, and this generating circuit from reference voltage 2 includes: difference computational unit 21, lookup unit 22 and ginseng
Examine voltage computation unit 23.Wherein, difference computational unit 21 is for obtaining anchor-frame frequency and successive frame from time schedule controller 1
Synchronization frame frequency, and according to the anchor-frame frequency got and the synchronization frame frequency of successive frame, calculate the synchronization frame of present frame
Frequency and the frame rate difference of anchor-frame frequency.Search unit 22 to be connected with difference computational unit 21, store in searching unit 22
There are multiple frame rate difference and the one-to-one relationship of multiple reference voltage difference, search unit 22 for according to this corresponding relation
Find out the reference voltage difference corresponding with calculated frame rate difference.Reference voltage computing unit 23 and lookup unit
22 are connected, and reference voltage computing unit 23 is for the ginseng fixed reference potential matched with anchor-frame frequency and lookup obtained
Examine voltage difference to be added, obtain the reference voltage that the synchronization frame frequency with present frame matches.
Generating circuit from reference voltage provided in the present embodiment, is calculated present frame by difference computational unit 21
The frame rate difference of synchronization frame frequency and anchor-frame frequency, then according to search storage in unit 22 multiple frame rate differences and
The one-to-one relationship of multiple reference voltage differences, finds the reference voltage corresponding with calculated frame rate difference poor
Value, afterwards by reference voltage computing unit 23 by electric to the fixed reference potential corresponding to anchor-frame frequency and the reference found
Pressure difference is added, and obtains the reference voltage that the synchronization frame frequency with present frame matches, it is achieved thereby that according to different synchronizations
Frame rate arranges the purpose of different reference voltages matchingly.Corresponding to the synchronization frame frequency different relative in prior art
For reference voltage is all a fixed voltage, the corresponding different reference voltage of synchronization frame frequencies different in the present embodiment, it is to avoid
The TFT undercharge caused owing to reference voltage does not mates with synchronization frame frequency or situation about overcharging occur, it is ensured that every
The reference voltage that one frame is exported is satisfied by the charging requirement of TFT so that display shows normally.
Scheme based on above-mentioned generating circuit from reference voltage, as in figure 2 it is shown, generating circuit from reference voltage also includes corresponding pass
Being signal generating unit 24, this corresponding relation signal generating unit 24 is connected with searching unit 22, and corresponding relation signal generating unit 24 is used for generating
Multiple frame rate differences and the one-to-one relationship of multiple reference voltage difference.This correspondence is generated in corresponding relation signal generating unit 24
After relation, this corresponding relation that corresponding relation signal generating unit 24 is generated by lookup unit 22 stores, and according to this correspondence
Relation finds out the reference voltage difference corresponding with calculated frame rate difference.
Generating above-mentioned corresponding relation can in the following way, as it is shown on figure 3, corresponding relation signal generating unit 24 comprises the steps that mark
Stator unit 241, variable quantity computation subunit 242 and corresponding relation determine subelement 243.Demarcate subelement 241 for from time
Sequence controller 1 obtains anchor-frame frequency, determines the fixed reference potential matched with anchor-frame frequency, and demarcate one
In the critical frame rate of anchor-frame frequency, determine the critical reference voltage matched with critical frame rate.It is single that variable quantity calculates son
Unit 242 is connected with demarcating subelement 241, and variable quantity computation subunit 242 is used for calculating critical frame rate and anchor-frame frequency
Difference, and calculate the difference of critical reference voltage and fixed reference potential, obtain and become critical frame rate from anchor-frame frequency
During, frame rate often changes the variable quantity that 1Hz reference voltage should occur.Corresponding relation determines subelement 243 and variable quantity
Computation subunit 242 is connected, and corresponding relation determines that subelement 243, for determining multiple frame rate difference, often becomes according to frame rate
Change the variable quantity that should occur of 1Hz reference voltage, be calculated determined by multiple frame rate differences each self-corresponding with reference to electricity
Pressure difference, generates multiple frame rate difference and the one-to-one relationship of multiple reference voltage difference.
In the present embodiment, multiple frame rate differences preferably arithmetic progression with 1 as tolerance, multiple reference voltage differences
The preferably arithmetic progression with 0.013 as tolerance.Anchor-frame frequency can be arranged according to actual needs, it is preferred that the present embodiment
In involved anchor-frame frequency can be 60Hz, the span of the fixed reference potential matched with it be preferably 2.0V～
8.4V, can be set to 8.2V herein.The scope of frame rate difference is arranged also dependent on needs, owing to synchronization frame frequency is generally at 30Hz
Between 120Hz, therefore, if anchor-frame frequency is 60Hz, in the present embodiment, the scope of frame rate difference is preferably-30Hz extremely
+ 60Hz, and if frame rate often to change the variable quantity that 1Hz reference voltage should occur be 0.013V, with the model of frame rate difference
The scope enclosing corresponding reference voltage difference is preferably-0.39V to+0.78V.
The work process of the generating circuit from reference voltage provided the present embodiment below by concrete example is carried out
Introduce.
As shown in table 1 below, in table, Δ f is frame rate difference, and Δ V is reference voltage difference, represented by table 1 for multiple Δs
One-to-one relationship between f and multiple Δ V.Wherein, the scope of multiple Δ f is-30Hz to+60Hz, and the scope of multiple Δ V is
For-0.39V to+0.78V, frame rate often changes 1Hz, and the variable quantity that reference voltage should occur is 0.013V, i.e. Δ f often increases
(or minimizing) 1Hz, Δ V accordingly increases (or minimizing) 0.013V.
Table 1
| Δf(Hz) | ΔV(V) |
| -30 | -0.39 |
| … | … |
| -20 | -0.26 |
| … | … |
| 1 | 0.013 |
| 2 | 0.026 |
| … | … |
| 20 | 0.26 |
| … | … |
| 60 | 0.78 |
Based on upper table, the generating circuit from reference voltage 2 that the present embodiment is provided generates the process of reference voltage and is: assume solid
Framing frequency is 60Hz, and the fixed reference potential mated with anchor-frame frequency 60Hz is 8.2V.If difference computational unit 21 obtains
The synchronization frame frequency of the present frame got is 40Hz, then calculate the frame frequency rate variance of synchronization frame frequency 40Hz and anchor-frame frequency 60Hz
Value Δ f is-20Hz.Then, lookup unit 22, according to the above-mentioned table 1 of storage in it, finds out relative with frame rate difference-20Hz
Reference voltage difference DELTA V answered, this reference voltage difference DELTA V is-0.26V.Then, reference voltage computing unit 23 is by fixing ginseng
Examine voltage 8.2V to be added with reference voltage difference-0.26V, obtain the reference voltage matched with synchronization frame frequency 40Hz, this ginseng
Examining voltage is 7.94V.
It should be noted that the one-to-one relationship between multiple Δ f and multiple Δ V represented in upper table specifically may be used
Obtain in the following way: exemplarily, be 60Hz by anchor-frame frequency configuration, determine that match with anchor-frame frequency fixes
Reference voltage is 8.2V, and critical frame rate is set to 30Hz, determines the critical reference voltage matched with critical frame rate 30Hz,
This critical reference voltage is 0.4V, then being changed to the variable quantity of critical frame rate 30Hz from anchor-frame frequency 60Hz is-30Hz, from
It is-0.4V that fixed reference potential 8.2V is changed to the variable quantity of critical reference voltage 0.4V, then when frame rate often changes 1Hz, and ginseng
Examining the variable quantity that voltage should occur is 0.013V, i.e. Δ f often increases (or minimizing) 1Hz, Δ V and accordingly increases (or minimizing)
0.013V.Owing to synchronization frame frequency is generally between 30Hz to 120Hz, if anchor-frame frequency is set to 60Hz, then frame frequency rate variance
Value Δ f is in the range of-30Hz to+60Hz, it may be determined that multiple Δ f are the whole integers within the scope of-30Hz to+60Hz.According to
Δ f often increases (or reduce) 1Hz, Δ V and accordingly increases (or minimizing) 0.013V, available determined by each Δ f corresponding
Reference voltage difference, thus obtain the one-to-one relationship between the multiple Δ f shown in table 1 and multiple Δ V.
Embodiment two
Present embodiments providing a kind of reference voltage generating method, as shown in Figure 4, reference voltage generating method includes:
Step S1: according to the synchronization frame frequency of anchor-frame frequency and successive frame, calculates the synchronization frame frequency of present frame with solid
The frame rate difference of framing frequency.
Step S2: according to multiple frame rate differences and the one-to-one relationship of multiple reference voltage difference, find out and count
Calculate and obtain the reference voltage difference corresponding with frame rate difference.
Step S3: the reference voltage difference phase that the fixed reference potential matched with anchor-frame frequency and lookup are obtained
Add, obtain the reference voltage that the synchronization frame frequency with present frame matches.
In the reference voltage generating method that the present embodiment is provided, according to the synchronization frame frequency of anchor-frame frequency and successive frame
Rate, calculates the synchronization frame frequency of present frame and the frame rate difference of anchor-frame frequency, then according to multiple frame rate differences with many
The one-to-one relationship of individual reference voltage difference, finds the reference voltage difference corresponding with being calculated frame rate difference,
Afterwards by the fixed reference potential corresponding to anchor-frame frequency and the reference voltage difference value found, obtain and present frame
The reference voltage that synchronization frame frequency matches, it is achieved thereby that arrange different references matchingly according to different synchronization frame frequencies
The purpose of voltage.Reference voltage synchronization frame frequency corresponding to different relative in prior art be all a fixed voltage value and
Speech, synchronization frame frequency different in the present embodiment corresponding different reference voltage, it is to avoid due to reference voltage and Tong Bu frame frequency
TFT undercharge that rate is not mated and caused or situation about overcharging occur, it is ensured that the reference voltage that each frame is exported is the fullest
The charging requirement of foot TFT so that display shows normally.
Scheme based on above-mentioned reference voltage generating method, in the present embodiment, reference voltage generating method may additionally include step
Generate the step of the one-to-one relationship of multiple frame rate difference and multiple reference voltage difference before rapid S2, generate this correspondence and close
The step of system includes: according to anchor-frame frequency, determines the fixed reference potential matched with anchor-frame frequency, demarcates one
In the critical frame rate of anchor-frame frequency, determine the critical reference voltage matched with critical frame rate.Calculate critical frame rate
With the difference of anchor-frame frequency, and calculate the difference of critical reference voltage and fixed reference potential, obtain and become from anchor-frame frequency
During critical frame rate, frame rate often changes the variable quantity that 1Hz reference voltage should occur.Determine multiple frame frequency rate variance
Value, often change the variable quantity that 1Hz reference voltage should occur according to frame rate, be calculated determined by multiple frame rate differences
Each self-corresponding reference voltage difference, generates multiple frame rate difference and the one-to-one relationship of multiple reference voltage difference.
Embodiment three
As it is shown in figure 5, this enforcement provides a kind of control chip 3, this control chip 3 includes the time schedule controller 1 being connected
With generating circuit from reference voltage 2, the wherein generating circuit from reference voltage 2 generating circuit from reference voltage mentioned by embodiment one.
Generating circuit from reference voltage 2 included by control chip 3 in the present embodiment can be according to different synchronization frames
Frequency generates the reference voltage matched, thus ensures that the reference voltage that each frame is exported is satisfied by the charging requirement of TFT, because of
This includes that the control chip 3 of this generating circuit from reference voltage 2 ensure that the reference voltage that each frame is exported is satisfied by TFT's
Charging requirement, makes display normally show.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (9)
1. a generating circuit from reference voltage, described generating circuit from reference voltage is connected with the time schedule controller of display, and it is special
Levying and be, described generating circuit from reference voltage includes:
Difference computational unit, described difference computational unit is for obtaining anchor-frame frequency and successive frame from described time schedule controller
Synchronization frame frequency, according to the anchor-frame frequency got and the synchronization frame frequency of successive frame, calculate the synchronization frame frequency of present frame
Rate and the frame rate difference of anchor-frame frequency；
The lookup unit being connected with described difference computational unit, stores multiple frame rate difference and multiple in described lookup unit
The one-to-one relationship of reference voltage difference, described lookup unit is for finding out and calculated frame according to this corresponding relation
The reference voltage difference that frequency-splitting is corresponding；
The reference voltage computing unit being connected with described lookup unit, described reference voltage computing unit will be for fixing with described
The fixed reference potential that frame rate matches and the reference voltage difference value that lookup obtains, obtain the synchronization frame frequency with present frame
The reference voltage that rate matches.
Generating circuit from reference voltage the most according to claim 1, it is characterised in that described generating circuit from reference voltage also wraps
Including corresponding relation signal generating unit, described corresponding relation signal generating unit is connected with described lookup unit, and described corresponding relation generates single
Unit is for generating the plurality of frame rate difference and the one-to-one relationship of multiple reference voltage difference.
Generating circuit from reference voltage the most according to claim 2, it is characterised in that described corresponding relation signal generating unit bag
Include:
Demarcating subelement, described demarcation subelement, for obtaining anchor-frame frequency from described time schedule controller, determines with described
The fixed reference potential that anchor-frame frequency matches, and demarcate a critical frame rate being not equal to described anchor-frame frequency, really
The fixed critical reference voltage matched with described critical frame rate；
The variable quantity computation subunit being connected with described demarcation subelement, described variable quantity computation subunit be used for calculating described in face
Boundary's frame rate and the difference of described anchor-frame frequency, and calculate described critical reference voltage and the difference of described fixed reference potential
Value, obtains during described anchor-frame frequency becomes described critical frame rate, and frame rate often changes 1Hz reference voltage should
The variable quantity occurred；
The corresponding relation being connected with described variable quantity computation subunit determine subelement, described corresponding relation determine subelement for
Determine multiple frame rate difference, often change, according to described frame rate, the variable quantity that 1Hz reference voltage should occur, be calculated institute
The each self-corresponding reference voltage difference of multiple frame rate differences determined, generates multiple frame rate difference and multiple reference voltage is poor
The one-to-one relationship of value.
4. according to the generating circuit from reference voltage described in any one of claims 1 to 3, it is characterised in that the plurality of frame rate
Difference is the arithmetic progression with 1Hz as tolerance, and the plurality of reference voltage difference is the arithmetic progression with 0.013V as tolerance.
Generating circuit from reference voltage the most according to claim 4, it is characterised in that described frame rate difference in the range of-
30Hz to+60Hz, described reference voltage difference is in the range of-0.39V to 0.78V.
6. according to the generating circuit from reference voltage described in any one of claims 1 to 3, it is characterised in that described anchor-frame frequency
For 60Hz, the fixed reference potential matched with it is 8.2V.
7. a reference voltage generating method, it is characterised in that described reference voltage generating method includes:
Step S1: according to the synchronization frame frequency of anchor-frame frequency and successive frame, the synchronization frame frequency calculating present frame is solid with described
The frame rate difference of framing frequency；
Step S2: according to multiple frame rate differences and the one-to-one relationship of multiple reference voltage difference, find out and calculate
The reference voltage difference that the frame rate difference that arrives is corresponding；
Step S3: the reference voltage difference phase that the fixed reference potential matched with described anchor-frame frequency and lookup are obtained
Add, obtain the reference voltage that the synchronization frame frequency with present frame matches.
Reference voltage generating method the most according to claim 7, it is characterised in that described reference voltage generating method also wraps
Include the step of the one-to-one relationship generating the plurality of frame rate difference and multiple reference voltage difference before step S2, raw
The step becoming this corresponding relation includes:
According to described anchor-frame frequency, determine the fixed reference potential matched with described anchor-frame frequency, demarcate one
In the critical frame rate of described anchor-frame frequency, determine the critical reference voltage matched with described critical frame rate；
Calculate described critical frame rate and the difference of described anchor-frame frequency, and calculate described critical reference voltage and described fixing
The difference of reference voltage, obtains during described anchor-frame frequency becomes described critical frame rate, and frame rate often changes 1Hz
The variable quantity that reference voltage should occur；
Determine multiple frame rate difference, often change, according to described frame rate, the variable quantity that 1Hz reference voltage should occur, calculate
The each self-corresponding reference voltage difference of multiple frame rate differences determined by arriving, generates multiple frame rate difference and multiple with reference to electricity
The one-to-one relationship of pressure difference.
9. a control chip, it is characterised in that include time schedule controller and the generating circuit from reference voltage being connected, described reference
Voltage generation circuit is generating circuit from reference voltage as described in any one of claim 1～6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610513127.2A CN106157908B (en) | 2016-06-30 | 2016-06-30 | Generating circuit from reference voltage and reference voltage generating method, control chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610513127.2A CN106157908B (en) | 2016-06-30 | 2016-06-30 | Generating circuit from reference voltage and reference voltage generating method, control chip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106157908A true CN106157908A (en) | 2016-11-23 |
| CN106157908B CN106157908B (en) | 2018-12-21 |
Family
ID=57350900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610513127.2A Active CN106157908B (en) | 2016-06-30 | 2016-06-30 | Generating circuit from reference voltage and reference voltage generating method, control chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106157908B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108648717A (en) * | 2018-07-27 | 2018-10-12 | 北京集创北方科技股份有限公司 | A kind of reference voltage generating circuit, reference voltage generation method, chip and liquid crystal display |
| CN111312149A (en) * | 2020-03-10 | 2020-06-19 | Tcl华星光电技术有限公司 | Driving method and driving device |
| CN111857223A (en) * | 2020-07-24 | 2020-10-30 | 南方电网数字电网研究院有限公司 | Chip voltage adjusting method and device, computer equipment and storage medium |
| CN114067733A (en) * | 2020-08-07 | 2022-02-18 | 北京小米移动软件有限公司 | Display screen correction method, display screen correction device and display chip |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6388653B1 (en) * | 1998-03-03 | 2002-05-14 | Hitachi, Ltd. | Liquid crystal display device with influences of offset voltages reduced |
| CN1409291A (en) * | 2001-09-17 | 2003-04-09 | Lg.飞利浦Lcd有限公司 | Method and device for driving liquid crystal display |
| CN102855863A (en) * | 2011-06-30 | 2013-01-02 | 乐金显示有限公司 | Display device and method used for driving the same |
| US20140368418A1 (en) * | 2010-12-09 | 2014-12-18 | Chunghwa Picture Tubes, Ltd. | Timing controller for liquid crystal panel and timing control method thereof |
| CN104952388A (en) * | 2015-05-27 | 2015-09-30 | 友达光电股份有限公司 | Source driving device and display signal receiving method |
| CN105103214A (en) * | 2013-01-14 | 2015-11-25 | 苹果公司 | Low power display device with variable refresh rate |
-
2016
- 2016-06-30 CN CN201610513127.2A patent/CN106157908B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6388653B1 (en) * | 1998-03-03 | 2002-05-14 | Hitachi, Ltd. | Liquid crystal display device with influences of offset voltages reduced |
| CN1409291A (en) * | 2001-09-17 | 2003-04-09 | Lg.飞利浦Lcd有限公司 | Method and device for driving liquid crystal display |
| US20140368418A1 (en) * | 2010-12-09 | 2014-12-18 | Chunghwa Picture Tubes, Ltd. | Timing controller for liquid crystal panel and timing control method thereof |
| CN102855863A (en) * | 2011-06-30 | 2013-01-02 | 乐金显示有限公司 | Display device and method used for driving the same |
| CN105103214A (en) * | 2013-01-14 | 2015-11-25 | 苹果公司 | Low power display device with variable refresh rate |
| CN104952388A (en) * | 2015-05-27 | 2015-09-30 | 友达光电股份有限公司 | Source driving device and display signal receiving method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108648717A (en) * | 2018-07-27 | 2018-10-12 | 北京集创北方科技股份有限公司 | A kind of reference voltage generating circuit, reference voltage generation method, chip and liquid crystal display |
| CN108648717B (en) * | 2018-07-27 | 2024-02-02 | 北京集创北方科技股份有限公司 | Reference voltage generation circuit, reference voltage generation method, chip and liquid crystal display |
| CN111312149A (en) * | 2020-03-10 | 2020-06-19 | Tcl华星光电技术有限公司 | Driving method and driving device |
| CN111857223A (en) * | 2020-07-24 | 2020-10-30 | 南方电网数字电网研究院有限公司 | Chip voltage adjusting method and device, computer equipment and storage medium |
| CN111857223B (en) * | 2020-07-24 | 2021-09-24 | 南方电网数字电网研究院有限公司 | Chip voltage adjusting method and device, computer equipment and storage medium |
| CN114067733A (en) * | 2020-08-07 | 2022-02-18 | 北京小米移动软件有限公司 | Display screen correction method, display screen correction device and display chip |
| CN114067733B (en) * | 2020-08-07 | 2023-12-05 | 北京小米移动软件有限公司 | Display screen correction method, display screen correction device and display chip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106157908B (en) | 2018-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106157908A (en) | Generating circuit from reference voltage and reference voltage generating method, control chip | |
| US10204580B2 (en) | Scan-driving device with detective-driving circuit | |
| CN102945660B (en) | Display device and grid signal generation method thereof | |
| US9741304B2 (en) | Shift register unit and driving method thereof, shift register circuit, and display apparatus | |
| CN103366717B (en) | Display packing, Apparatus and system | |
| US20060132417A1 (en) | Semiconductor integrated circuit for liquid crystal display driver | |
| US10026496B2 (en) | Shift register unit and method for driving the same, gate drive circuit and display device | |
| US20140333608A1 (en) | Display driver ic | |
| US20140091997A1 (en) | Shift register and flat panel display device having the same | |
| US20180240414A1 (en) | Circuit for removing residual image after power-off, method for driving same, and display apparatus | |
| US8542224B2 (en) | Display clip system and timing clip control method thereof | |
| CN100495128C (en) | Gamma reference voltage generation circuit | |
| CN112951146B (en) | Shift register, driving method, scanning driving circuit, display panel and device | |
| EP3293725A1 (en) | Display device and driving method thereof | |
| US20130088480A1 (en) | Driving method for display device | |
| WO2016107200A1 (en) | Pixel circuit and driving method therefor, and display device | |
| KR100292315B1 (en) | Delay control circuit | |
| US10020725B2 (en) | Voltage boosting circuit capable of modulating duty cycle automatically | |
| KR101624314B1 (en) | Voltage Calibration Circuit And Related Liquid Crystal Display Device | |
| CN108615510B (en) | Chamfering circuit and control method | |
| KR100676478B1 (en) | Liquid crystal display device, driving circuit for the same and driving method for the same | |
| WO2018152769A1 (en) | Crystal oscillator and control circuit thereof | |
| US20090146993A1 (en) | Liquid crystal display device and driving method thereof | |
| CN105679227A (en) | Display device and method for providing supply voltage of grid drive circuit | |
| US20210201840A1 (en) | Driving circuit of display panel, driving method thereof, and display panel |
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 |