CN106157908B - 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
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- CN106157908B CN106157908B CN201610513127.2A CN201610513127A CN106157908B CN 106157908 B CN106157908 B CN 106157908B CN 201610513127 A CN201610513127 A CN 201610513127A CN 106157908 B CN106157908 B CN 106157908B
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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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- 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
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- Automation & Control Theory (AREA)
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- Crystallography & Structural Chemistry (AREA)
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- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention discloses a kind of generating circuit from reference voltage and its production method, control chip, is related to field of display technology, for generating matched reference voltage according to different synchronization frame rates.Wherein, generating circuit from reference voltage includes: difference computational unit, for obtaining fixed frame rate frame rate synchronous with successive frame from sequence controller, calculates the synchronization frame rate of present frame and the frame rate difference of fixed frame rate；Searching unit stores the one-to-one relationship of multiple frame rate differences and multiple reference voltage differences in searching unit, for finding out reference voltage difference corresponding with the frame rate difference being calculated according to the corresponding relationship；Reference voltage computing unit, the reference voltage difference value for obtaining the fixed reference potential and lookup that match with fixed frame rate, obtains the reference voltage that frame rate synchronous with present frame matches.The generating circuit from reference voltage carries out showing required reference voltage for generating display.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of generating circuit from reference voltage and reference voltage generation sides
Method, control chip.
Background technique
(Thin Film Transistor-Liquid Crystal Display, tft liquid crystal are aobvious by TFT-LCD
Show device) display as current mainstream, it is widely used in TV, computer and projector etc. and shows in equipment.
Reference of the reference voltage as all output voltages is needed during the driving of TFT-LCD, in the prior art
The reference voltage of TFT-LCD is generated generally according to fixed frame rate (generally 60Hz), therefore generated reference voltage is one
Fixed voltage.That is, the synchronization frame rate of each frame (drives the practical frame frequency generated in the process during no matter driving
Rate) whether it is equal to fixed frame rate, the reference voltage of TFT-LCD is fixed and invariable.Due to the generation of above-mentioned reference voltage
Mode does not consider whether the synchronization frame rate of each frame matches with reference voltage, this will be to (the Thin Film of TFT in TFT-LCD
Transistor, thin film transistor (TFT)) charging situation impact, for example, being led when synchronous frame rate is greater than fixed frame rate
TFT undercharge is caused, on the contrary, causing TFT to be overcharged with electricity, above two knot when synchronous frame rate is less than fixed frame rate
The display that fruit will cause TFT-LCD is abnormal.
Summary of the invention
The purpose of the present invention is to provide a kind of generating circuit from reference voltage and reference voltage generating method, chip is controlled,
For generating matched different reference voltages according to different synchronization frame rates, meet TFT in different synchronization frame frequencies
Charging requirement under rate, shows that TFT-LCD normally.
To achieve the goals above, the invention provides the following technical scheme:
The first aspect of the present invention provides a kind of generating circuit from reference voltage, the generating circuit from reference voltage and display
The sequence controller of device is connected, and the generating circuit from reference voltage includes: difference computational unit, and the difference computational unit is used for
Fixed frame rate frame rate synchronous with successive frame is obtained from the sequence controller, according to the fixation frame rate got and
The synchronization frame rate of successive frame calculates the synchronization frame rate of present frame and the frame rate difference of fixed frame rate；With the difference
Computing unit connected searching unit stores multiple frame rate differences and multiple reference voltage differences in the searching unit
One-to-one relationship, the searching unit are corresponding with the frame rate difference being calculated for being found out according to the corresponding relationship
Reference voltage difference；The reference voltage computing unit being connected with the searching unit, the reference voltage computing unit are used for
The reference voltage difference value that the fixed reference potential and lookup that match with the fixed frame rate are obtained, obtain with currently
The reference voltage that the synchronization frame rate of frame matches.
The synchronization frame of present frame is calculated by difference computational unit for generating circuit from reference voltage provided by the present invention
The frame rate difference of frequency and fixed frame rate, then according to the multiple frame rate differences stored in searching unit and multiple references
The one-to-one relationship of voltage difference finds reference voltage difference corresponding with frame rate difference is calculated, Zhi Houtong
Fixed reference potential corresponding to frame rate and the reference voltage difference value found will be fixed by crossing reference voltage computing unit,
The reference voltage that frame rate synchronous with present frame matches is obtained, to realize according to different synchronization frame rates matchingly
The purpose of different reference voltages is set, ensure that reference voltage that each frame is exported is all satisfied the charging requirement of TFT, avoid
TFT undercharge caused by being mismatched due to reference voltage with synchronous frame rate or the problem of overcharge, so that display is aobvious
Show normal.
The second aspect of the present invention provides a kind of reference voltage generating method, and the reference voltage generating method includes:
Step S1: according to fixed frame rate frame rate synchronous with successive frame, calculate present frame synchronization frame rate and the anchor-frame
The frame rate difference of frequency；Step S2: it according to the one-to-one relationship of multiple frame rate differences and multiple reference voltage differences, looks into
Find out reference voltage difference corresponding with the frame rate difference being calculated；Step S3: will be with the fixed frame rate phase
The reference voltage difference value that the fixed reference potential and lookup matched obtain obtains what frame rate synchronous with present frame matched
Reference voltage.
The beneficial effect for the reference voltage generating method that the second aspect of the present invention provides is provided with above-mentioned first aspect
Generating circuit from reference voltage beneficial effect it is identical, details are not described herein.
The third aspect of the present invention provides a kind of control chip, the control chip include connected sequence controller and
Generating circuit from reference voltage, the generating circuit from reference voltage are that reference voltage mentioned by the first aspect of the present invention generates electricity
Road.
With reference to electricity provided by the beneficial effect and above-mentioned first aspect of the control chip that the third aspect of the present invention provides
Press the beneficial effect of generation circuit identical, details are not described herein.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.
In the accompanying drawings:
Fig. 1 is the structural schematic diagram one of the generating circuit from reference voltage in the embodiment of the present invention one；
Fig. 2 is the structural schematic diagram two of the generating circuit from reference voltage in the embodiment of the present invention one；
Fig. 3 is the structural schematic diagram of the corresponding relationship generation 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 schematic diagram of the control chip in the embodiment of the present invention three.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's acquired every other implementation without making creative work
Example, shall fall within the protection scope of the present invention.
Embodiment one
As shown in Figure 1, provide a kind of generating circuit from reference voltage 2 in the present embodiment, the generating circuit from reference voltage 2 with
The sequence controller 1 of display is connected, which includes: difference computational unit 21, searching unit 22 and ginseng
Examine voltage computation unit 23.Wherein, difference computational unit 21 is used to obtain fixed frame rate and successive frame from sequence controller 1
Synchronization frame rate calculate the synchronization frame of present frame and according to the fixation frame rate got frame rate synchronous with successive frame
The frame rate difference of frequency and fixed frame rate.Searching unit 22 is connected with difference computational unit 21, storage in searching unit 22
There is the one-to-one relationship of multiple frame rate differences and multiple reference voltage differences, searching unit 22 is used for according to the corresponding relationship
Find out reference voltage difference corresponding with the frame rate difference being calculated.Reference voltage computing unit 23 and searching unit
22 are connected, and reference voltage computing unit 23 is used for the ginseng for obtaining the fixed reference potential and lookup that match with fixed frame rate
Voltage difference addition is examined, the reference voltage that frame rate synchronous with present frame matches is obtained.
Present frame is calculated by difference computational unit 21 in generating circuit from reference voltage provided in the present embodiment
The frame rate difference of synchronous frame rate and fixed frame rate, then according to the multiple frame rate differences stored in searching unit 22 and
It is poor to find reference voltage corresponding with the frame rate difference being calculated for the one-to-one relationship of multiple reference voltage differences
Value, it is by reference to voltage computation unit 23 that fixed reference potential corresponding to fixed frame rate and the reference found is electric later
Pressure difference is added, and the reference voltage that frame rate synchronous with present frame matches is obtained, to realize according to different synchronizations
The purpose of different reference voltages is matchingly arranged in frame rate.In compared with the existing technology corresponding to different synchronization frame rates
For reference voltage is a fixed voltage, different synchronization frame rates corresponds to different reference voltages in the present embodiment, avoids
TFT undercharge caused by being mismatched due to reference voltage with synchronous frame rate or appearance the case where overcharge, ensure that every
The reference voltage that one frame is exported is all satisfied the charging requirement of TFT, so that display is shown normally.
Based on the scheme of above-mentioned generating circuit from reference voltage, as shown in Fig. 2, generating circuit from reference voltage further includes corresponding pass
It is generation unit 24, which is connected with searching unit 22, and corresponding relationship generation unit 24 is for generating
The one-to-one relationship of multiple frame rate differences and multiple reference voltage differences.The correspondence is generated in corresponding relationship generation unit 24
After relationship, searching unit 22 stores the corresponding relationship generated of corresponding relationship generation unit 24, and according to the correspondence
Relationship finds out reference voltage difference corresponding with the frame rate difference being calculated.
Generating above-mentioned corresponding relationship can be used such as under type, as shown in figure 3, corresponding relationship generation unit 24 can include: mark
Stator unit 241, variable quantity computation subunit 242 and corresponding relationship determine subelement 243.Demarcate subelement 241 be used for from when
Fixed frame rate, the determining fixed reference potential to match with fixed frame rate are obtained in sequence controller 1, and are demarcated one and differed
In the critical frame rate of fixed frame rate, the determining critical reference voltage to match with critical frame rate.It is single that variable quantity calculates son
Member 242 is connected with calibration subelement 241, and variable quantity computation subunit 242 is used to calculate critical frame rate and fixes frame rate
Difference, and the difference of critical reference voltage and fixed reference potential is calculated, finding out from fixed frame rate becomes critical frame rate
In the process, the variable quantity that the every variation 1Hz reference voltage of frame rate should occur.Corresponding relationship determines subelement 243 and variable quantity
Computation subunit 242 is connected, and corresponding relationship determines subelement 243 for determining multiple frame rate differences, according to the every change of frame rate
Change the variable quantity that 1Hz reference voltage should occur, it is corresponding with reference to electricity that identified multiple frame rate differences are calculated
Pressure difference generates the one-to-one relationship of multiple frame rate differences and multiple reference voltage differences.
In the present embodiment, multiple frame rate differences are preferably the arithmetic progression with 1 for tolerance, multiple reference voltage differences
Preferably with 0.013 for tolerance arithmetic progression.Fixed frame rate can be arranged according to actual needs, it is preferred that the present embodiment
Involved in fix frame rate can for 60Hz, the value range of matched fixed reference potential be preferably 2.0V~
8.4V can be set to 8.2V herein.The range of frame rate difference can also be set as needed, since synchronous frame rate is usually in 30Hz
To between 120Hz, therefore, if fixed frame rate is 60Hz, the range of frame rate difference is preferably -30Hz extremely in the present embodiment
+ 60Hz, and if the every variable quantity that should occur of variation 1Hz reference voltage of frame rate is 0.013V, the model with frame rate difference
The range for enclosing corresponding reference voltage difference is preferably -0.39V to+0.78V.
To carry out the course of work of generating circuit from reference voltage provided by the present embodiment below by specific example
It introduces.
As shown in table 1 below, Δ f is frame rate difference in table, and it is multiple Δs represented by table 1 that Δ V, which is reference voltage difference,
One-to-one relationship between f and multiple Δ V.Wherein, the range of multiple Δ f is -30Hz to+60Hz, and the range of multiple Δ V is
For -0.39V to+0.78V, the every variation 1Hz of frame rate, the variable quantity that reference voltage should occur is 0.013V, the i.e. every increase of Δ f
(or reduction) 1Hz, Δ V accordingly increase (or reduction) 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, generating circuit from reference voltage 2 provided by the present embodiment generates the process of reference voltage are as follows: assuming that solid
Framing frequency is 60Hz, is 8.2V with fixed frame rate 60Hz matched fixed reference potentials.If difference computational unit 21 obtains
The synchronization frame rate for the present frame got is 40Hz, then the frame rate for calculating synchronous frame rate 40Hz and fixed frame rate 60Hz is poor
Value Δ f is -20Hz.Then, searching unit 22 is found out opposite with frame rate difference -20Hz according to the above-mentioned table 1 stored in it
The reference voltage difference DELTA V answered, this reference voltage difference DELTA V are -0.26V.Then, reference voltage computing unit 23 is joined fixed
It examines voltage 8.2V to be added with reference voltage difference -0.26V, obtains the reference voltage to match with synchronous frame rate 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
It obtains in the following way: being 60Hz by anchor-frame set of frequency illustratively, the determining fixation to match with fixed frame rate
Reference voltage is 8.2V, and critical frame rate is set as 30Hz, determines the critical reference voltage to match with critical frame rate 30Hz,
This critical reference voltage is 0.4V, then is -30Hz from the variable quantity that fixed frame rate 60Hz variation is critical frame rate 30Hz, from
The variable quantity that fixed reference potential 8.2V variation be critical reference voltage 0.4V is -0.4V, then when the every variation 1Hz of frame rate, joins
Examining the variable quantity that voltage should occur is 0.013V, i.e. Δ f is every to increase (or reduction) 1Hz, and Δ V accordingly increases (or reduction)
0.013V.Since synchronous frame rate is usually in 30Hz between 120Hz, if fixed frame rate is set as 60Hz, frame rate is poor
The range for being worth Δ f is -30Hz to+60Hz, it may be determined that multiple Δ f are whole integers within the scope of -30Hz to+60Hz.According to
Δ f is every to increase (or reduction) 1Hz, and Δ V accordingly increases (or reduction) 0.013V, it is corresponding that identified each Δ f can be obtained
Reference voltage difference, to obtain the one-to-one relationship between multiple Δ f and multiple Δ V shown in table 1.
Embodiment two
A kind of reference voltage generating method is present embodiments provided, as shown in figure 4, reference voltage generating method includes:
Step S1: it according to fixation frame rate frame rate synchronous with successive frame, calculates the synchronization frame rate of present frame and consolidates
The frame rate difference of framing frequency.
Step S2: it according to the one-to-one relationship of multiple frame rate differences and multiple reference voltage differences, finds out and counts
Calculation obtains reference voltage difference corresponding with frame rate difference.
Step S3: the reference voltage difference phase that the fixed reference potential and lookup that match with fixed frame rate are obtained
Add, obtains the reference voltage that frame rate synchronous with present frame matches.
In the reference voltage generating method provided by the present embodiment, according to fixed frame rate frame frequency synchronous with successive frame
Rate calculates the synchronization frame rate of present frame and the frame rate difference of fixed frame rate, then according to multiple frame rate differences and more
The one-to-one relationship of a reference voltage difference finds reference voltage difference corresponding with frame rate difference is calculated,
Later by fixed reference potential and the reference voltage difference value found corresponding to fixed frame rate, obtain and present frame
The reference voltage that synchronous frame rate matches, is matchingly arranged different references according to different synchronization frame rates to realize
The purpose of voltage.In compared with the existing technology reference voltage corresponding to different synchronization frame rates be a fixed voltage value and
It says, different synchronization frame rates corresponds to different reference voltages in the present embodiment, avoids due to reference voltage and synchronous frame frequency
Rate mismatch caused by TFT undercharge or appearance the case where overcharge, the reference voltage that ensure that each frame is exported it is full
The charging requirement of sufficient TFT, so that display is shown normally.
Based on the scheme of above-mentioned reference voltage generating method, reference voltage generating method may additionally include step in the present embodiment
The step of one-to-one relationship of multiple frame rate differences and multiple reference voltage differences is generated before rapid S2, generates correspondence pass
The step of being includes: according to fixed frame rate, the determining fixed reference potential to match with fixed frame rate, and calibration one differs
In the critical frame rate of fixed frame rate, the determining critical reference voltage to match with critical frame rate.Calculate critical frame rate
With the difference of fixed frame rate, and the difference of critical reference voltage and fixed reference potential is calculated, finds out from fixed frame rate and become
During critical frame rate, the every variable quantity that changes 1Hz reference voltage and should occur of frame rate.Determine that multiple frame rates are poor
Identified multiple frame rate differences are calculated according to the variable quantity that the every variation 1Hz reference voltage of frame rate should occur in value
Corresponding reference voltage difference generates the one-to-one relationship of multiple frame rate differences and multiple reference voltage differences.
Embodiment three
As shown in figure 5, this implementation provides a kind of control chip 3, which includes connected sequence controller 1
With generating circuit from reference voltage 2, wherein generating circuit from reference voltage 2 is generating circuit from reference voltage mentioned by embodiment one.
It can be according to different synchronization frames as controlling generating circuit from reference voltage 2 included by chip 3 in this present embodiment
Frequency generates the reference voltage that matches, thus guarantee that reference voltage that each frame is exported is all satisfied the charging requirement of TFT, because
This includes that control chip 3 reference voltage that can guarantee that each frame is exported of the generating circuit from reference voltage 2 is all satisfied TFT's
Charging requirement shows that display normally.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of generating circuit from reference voltage, the generating circuit from reference voltage is connected with the sequence controller of display, special
Sign is that the generating circuit from reference voltage includes:
Difference computational unit, the difference computational unit are used to obtain fixed frame rate and successive frame from the sequence controller
Synchronization frame rate the synchronization frame frequency of present frame is calculated according to the fixation frame rate got frame rate synchronous with successive frame
The frame rate difference of rate and fixed frame rate；
The searching unit being connected with the difference computational unit stores multiple frame rate differences and multiple in the searching unit
The one-to-one relationship of reference voltage difference, the searching unit are used for the frame for finding out and being calculated according to the corresponding relationship
The corresponding reference voltage difference of frequency difference；
The reference voltage computing unit being connected with the searching unit, the reference voltage computing unit is used for will be with the fixation
The reference voltage difference value that the fixed reference potential and lookup that frame rate matches obtain obtains frame frequency synchronous with present frame
The reference voltage that rate matches.
2. generating circuit from reference voltage according to claim 1, which is characterized in that the generating circuit from reference voltage also wraps
Corresponding relationship generation unit is included, the corresponding relationship generation unit is connected with the searching unit, and the corresponding relationship generates single
Member is for generating the one-to-one relationship of the multiple frame rate difference and multiple reference voltage differences.
3. generating circuit from reference voltage according to claim 2, which is characterized in that the corresponding relationship generation unit packet
It includes:
Demarcate subelement, the calibration subelement is used to obtain fixed frame rate from the sequence controller, determination with it is described
The fixed reference potential that fixed frame rate matches, and the critical frame rate for being not equal to the fixed frame rate is demarcated, really
The fixed critical reference voltage to match with the critical frame rate；
The variable quantity computation subunit being connected with the calibration subelement, the variable quantity computation subunit is for calculating described face
The difference of boundary's frame rate and the fixed frame rate, and calculate the difference of the critical reference voltage and the fixed reference potential
Value is found out during becoming the critical frame rate from the fixed frame rate, and the every variation 1Hz reference voltage of frame rate should
The variable quantity of generation；
The corresponding relationship being connected with the variable quantity computation subunit determines that subelement, the corresponding relationship determine that subelement is used for
It determines multiple frame rate differences, according to the variable quantity that the every variation 1Hz reference voltage of the frame rate should occur, institute is calculated
The determining corresponding reference voltage difference of multiple frame rate differences, generates multiple frame rate differences and multiple reference voltages is poor
The one-to-one relationship of value.
4. described in any item generating circuit from reference voltage according to claim 1~3, which is characterized in that the multiple frame rate
Difference is the arithmetic progression using 1Hz as tolerance, and the multiple reference voltage difference is the arithmetic progression using 0.013V as tolerance.
5. generating circuit from reference voltage according to claim 4, which is characterized in that the range of the frame rate difference be-
30Hz to+60Hz, the range of the reference voltage difference are -0.39V to 0.78V.
6. described in any item generating circuit from reference voltage according to claim 1~3, which is characterized in that the fixed frame rate
For 60Hz, matched fixed reference potential is 8.2V.
7. a kind of reference voltage generating method, which is characterized in that the reference voltage generating method includes:
Step S1: according to fixed frame rate frame rate synchronous with successive frame, calculate the synchronization frame rate of present frame with it is described solid
The frame rate difference of framing frequency；
Step S2: it according to the one-to-one relationship of multiple frame rate differences and multiple reference voltage differences, finds out and calculates
The corresponding reference voltage difference of the frame rate difference arrived；
Step S3: the reference voltage difference phase that the fixed reference potential and lookup that match with the fixed frame rate are obtained
Add, obtains the reference voltage that frame rate synchronous with present frame matches.
8. reference voltage generating method according to claim 7, which is characterized in that the reference voltage generating method also wraps
The step of including the one-to-one relationship that the multiple frame rate difference and multiple reference voltage differences are generated before step S2, it is raw
Include: at the step of corresponding relationship
According to the fixed frame rate, the determining fixed reference potential to match with the fixed frame rate, calibration one is differed
In the critical frame rate of the fixed frame rate, the determining critical reference voltage to match with the critical frame rate；
The difference of the critical frame rate and the fixed frame rate is calculated, and calculates the critical reference voltage and the fixation
The difference of reference voltage is found out during becoming the critical frame rate from the fixed frame rate, the every variation 1Hz of frame rate
The variable quantity that reference voltage should occur；
It determines multiple frame rate differences, according to the variable quantity that the every variation 1Hz reference voltage of the frame rate should occur, calculates
To identified multiple corresponding reference voltage differences of frame rate difference, multiple frame rate differences are generated and multiple with reference to electricity
The one-to-one relationship of pressure difference.
9. a kind of control chip, which is characterized in that sequence controller including display and be connected with the sequence controller
Reference voltage circuit, the generating circuit from reference voltage are the generating circuit from reference voltage as described in any one of claim 1~6.
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| 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 |
| CN111312149B (en) * | 2020-03-10 | 2023-12-08 | Tcl华星光电技术有限公司 | Driving method and driving device |
| 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 |
| 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 |
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