CN103413535B - A kind of method and apparatus improving LCDs angle of visibility scope - Google Patents
A kind of method and apparatus improving LCDs angle of visibility scope Download PDFInfo
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- CN103413535B CN103413535B CN201310344202.3A CN201310344202A CN103413535B CN 103413535 B CN103413535 B CN 103413535B CN 201310344202 A CN201310344202 A CN 201310344202A CN 103413535 B CN103413535 B CN 103413535B
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Abstract
The invention belongs to LCDs field, it is provided that a kind of method and apparatus improving LCDs angle of visibility scope.Described method includes: obtain the raw voltage values controlling liquid crystal display screen color in original color image signal；Described raw voltage values is carried out twice digital-to-analogue conversion simultaneously and generates two different driving voltages；It is adjusted the driving voltage that said two is different respectively according to described raw voltage values obtaining two different control voltages；Rotate according to two groups of liquid crystal molecules that the control voltage that said two is different controls each picture element described corresponding respectively.In the present invention, two control voltages are obtained by raw voltage values in colour picture signal being carried out twice digital-to-analogue conversion, it is adjusted controlling voltage, the two groups of liquid crystal molecules controlling each picture element of LCDs corresponding respectively carry out rotation twist, expand the angle of visibility scope of LCDs.
Description
Technical field
The invention belongs to LCDs field, particularly relate to a kind of method improving LCDs angle of visibility scope and
Device.
Background technology
The imaging principle of LCDs, is to be placed in by liquid crystal between two panels electro-conductive glass, by two electric field between electrodes
Driving, cause twisted liquid crystal molecules, the intensity in transmission of visual light source is closely related with twisted liquid crystal molecules angle.
We can find such a problem when seeing TV, when some angle of horizontal direction standing in television set dead ahead
Within the scope of degree, can will be apparent from sees content shown on television display screen, and picture color is also naturally, relaxes
Clothes；But when you see sideling, and during a certain angle of strabismus, the direction that is up to the standard, gem-pure cannot see the interior of display screen
Hold, in other words, it is seen that TV image color become, such as lose color etc..Here it is the angle of visibility problem of television set, can not lose
Really see that this angle of strabismus scope of picture is angle of visibility scope, and the angle of visibility scope of existing LCDs is general
Less.
Summary of the invention
The invention provides a kind of method improving LCDs angle of visibility scope, it is intended to solve available liquid crystal display screen
The problem that angle of visibility scope is less.
In order to solve above-mentioned technical problem, the present invention is achieved in that a kind of raising LCDs angle of visibility scope
Method, each picture element of described LCDs is made up of two groups of three primary colories respectively, and described two groups of three primary colories are the most right
Two groups of liquid crystal molecules, the method for described raising LCDs angle of visibility scope are answered to comprise the following steps:
Obtain the raw voltage values of the color controlling described LCDs in original color image signal；
Described raw voltage values is carried out twice digital-to-analogue conversion simultaneously and generates two different driving voltages；
The driving voltage that said two is different is adjusted respectively control described two group liquid crystal molecules with generation respectively enter
Two different control voltages that row rotates；
Control described two groups of liquid crystal molecules respectively according to the control voltage that said two is different to rotate.
Further, described described raw voltage values carried out twice digital-to-analogue conversion simultaneously and generates two different drivings
The step of voltage specifically includes following steps:
Described raw voltage values is carried out digital-to-analogue conversion for the first time and generates first group of liquid in the described two groups of liquid crystal molecules of driving
Brilliant molecule carries out the first driving voltage rotated；
Described raw voltage values is carried out second time digital-to-analogue conversion and generates second group of liquid in the described two groups of liquid crystal molecules of driving
Brilliant molecule carries out the second driving voltage rotated.
Further, described being adjusted the driving voltage that said two is different respectively controls described two respectively to generate
Two different steps controlling voltages that group liquid crystal molecule carries out rotating specifically include following steps:
According to described raw voltage values and the first predetermined angle, described first driving voltage is carried out size adjustment, to generate
Control described first group of liquid crystal molecule to relative to the first predetermined angle described in the vertical anticlockwise of described LCDs
First controls voltage；
According to described raw voltage values and the second predetermined angle, described second driving voltage is carried out size adjustment, to generate
Control described second group of liquid crystal molecule to relative to the second predetermined angle described in the vertical right rotation of described LCDs
Second controls voltage.
Further, described first controls voltage is less than described raw voltage values, and described second controls voltage more than described
Raw voltage values.
Further, the described control voltage different according to said two controls described two groups of liquid crystal molecules respectively and revolves
The step turned specifically includes following steps:
First group of liquid crystal molecule described in Control of Voltage is controlled to hanging down relative to described LCDs according to described first
Face the first predetermined angle described in anticlockwise directly；
Second group of liquid crystal molecule described in Control of Voltage is controlled to hanging down relative to described LCDs according to described second
Face the second predetermined angle described in right rotation directly.
Present invention also offers a kind of device improving LCDs angle of visibility scope, described LCDs each
Individual picture element is made up of two groups of three primary colories respectively, described two groups of three primary colories corresponding two groups of liquid crystal molecules, described raising liquid crystal respectively
The device of display screen angle of visibility scope includes:
Signal acquiring unit, for obtaining color original controlling described LCDs in original color image signal
Magnitude of voltage；
D/A conversion unit, generates two different driving for described raw voltage values carrying out twice digital-to-analogue conversion simultaneously
Galvanic electricity pressure；
Voltage regulation unit, is used for being adjusted the driving voltage that said two is different respectively controlling institute respectively to generate
State two different control voltages that two groups of liquid crystal molecules carry out rotating；
Electrode control unit, enters for controlling described two groups of liquid crystal molecules respectively according to the control voltage that said two is different
Row rotates.
Further, described D/A conversion unit includes:
First D/A conversion unit, generates driving described two for described raw voltage values carries out digital-to-analogue conversion for the first time
The first driving voltage that in group liquid crystal molecule, first group of liquid crystal molecule carries out rotating；
Second D/A conversion unit, generates driving described two for described raw voltage values carries out second time digital-to-analogue conversion
The second driving voltage that in group liquid crystal molecule, second group of liquid crystal molecule carries out rotating.
Further, described voltage regulation unit includes:
First voltage regulation unit, for driving electricity according to described raw voltage values and the first predetermined angle to described first
Pressure carries out size adjustment, controls described first group of liquid crystal molecule to left-handed relative to the vertical of described LCDs to generate
Turn the first control voltage of described first predetermined angle；
Second voltage regulation unit, for driving electricity according to described raw voltage values and the second predetermined angle to described second
Pressure carries out size adjustment, controls described second group of liquid crystal molecule to the vertical dextrorotation relative to described LCDs to generate
Turn the second control voltage of described second predetermined angle.
Further, described first controls voltage is less than described raw voltage values, and described second controls voltage more than described
Raw voltage values.
Further, described electrode control unit includes:
First electrode control unit, for controlling first group of liquid crystal molecule described in Control of Voltage to relatively according to described first
In the first predetermined angle described in the vertical anticlockwise of described LCDs；
Second electrode control unit, for controlling second group of liquid crystal molecule described in Control of Voltage to relatively according to described second
In the second predetermined angle described in the vertical right rotation of described LCDs.
In the present invention, two controls are obtained by raw voltage values in colour picture signal being carried out twice digital-to-analogue conversion
Voltage, is adjusted controlling voltage, controls two groups of liquid crystal molecules that each picture element of LCDs is corresponding respectively, makes liquid crystal
The liquid crystal molecule that each picture element of display screen is corresponding carries out rotation twist under the effect controlling voltage, expands LCDs
Angle of visibility scope, solve the problem that available liquid crystal display screen angle of visibility scope is less.
Accompanying drawing explanation
Fig. 1 is the flow chart of the method for the offer LCDs angle of visibility scope that the embodiment of the present invention provides；
Fig. 2 is the signal that the liquid crystal molecule that the embodiment of the present invention provides the most to the left and expands angle of visibility scope to right rotation
Figure；
Fig. 3 is the function structure chart of the device of the offer LCDs angle of visibility scope that the embodiment of the present invention provides；
Fig. 4 is the circuit structure diagram of the first voltage regulation unit that the embodiment of the present invention provides；
A1 represents the one of which in two groups of liquid crystal molecules that in LCDs, each picture element is corresponding；
A2 represents another group in two groups of liquid crystal molecules that in LCDs, each picture element is corresponding.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
Below in conjunction with specific embodiment the present invention implemented and is described in detail:
Fig. 1 illustrates the flow chart of the method for the raising LCDs angle of visibility scope that the embodiment of the present invention provides, in order to
It is easy to explanation, only lists part related to the present embodiment.
As one embodiment of the invention, the liquid crystal molecule of LCDs carries out distortion under the control of electrode and rotates, when
When liquid crystal molecule have rotated different angles, light source through colour filter thus shows through after liquid crystal molecule in LCDs again
Show different colors.
In embodiments of the present invention, each picture element of LCDs is formed (three primary colors by two groups of three primary colories respectively
RGB and three primary colors R ' G ' B ', two kinds of three primary colories are identical), these two groups of three primary colories corresponding two groups of liquid crystal molecules respectively, improve liquid
The method of crystal display screen angle of visibility scope comprises the following steps:
Step S100, acquisition original color image signal control the raw voltage values of the color of LCDs.
In the step s 100, original color image signal includes the raw voltage values controlling each picture element color,
And the color controlling each picture element is to be realized by the distortion different angle of rotation controlling liquid crystal molecule.
Step S200, raw voltage values is carried out twice digital-to-analogue conversion and generate two different driving voltages simultaneously.
As one embodiment of the invention, raw voltage values is a digital signal, needs to be converted into analogue signal,
In the embodiment of the present invention, need raw voltage values carries out digital-to-analogue conversion simultaneously, generate two different driving voltages.
In step s 200, raw voltage values is carried out twice digital-to-analogue conversion simultaneously and generates two different driving voltages
Step specifically includes following steps:
S201, raw voltage values is carried out for the first time digital-to-analogue conversion generate and drive the two group liquid corresponding with each picture element
The first driving voltage that in brilliant molecule, first group of liquid crystal molecule carries out rotating；
S202, raw voltage values is carried out second time digital-to-analogue conversion generate and drive two group liquid corresponding with each picture element
The second driving voltage that in brilliant molecule, second group of liquid crystal molecule carries out rotating.
Step S300, it is adjusted two different driving voltages respectively controlling two groups of liquid crystal molecules respectively enter generating
Two different control voltages that row rotates.
In embodiments of the present invention, need the driving voltage after carrying out digital-to-analogue conversion to be adjusted, because carrying out digital-to-analogue
There is certain difference in the magnitude of voltage after conversion and raw voltage values, if directly using the first driving voltage and second to drive electricity
Pressure controls two groups of liquid crystal molecules respectively and rotates, then the color that final LCDs show by distortion and more seriously,
In order to avoid this imagination, it is necessary to according to raw voltage values, driving voltage is carried out (size) and adjust to generate control voltage,
Make its (control voltage) close to raw voltage values, owing to liquid crystal molecule itself has visible angle (generally 60 degree), work as control
When voltage is more than raw voltage values or less than raw voltage values, the angle of visibility scope being perpendicular to LCDs side will become
Greatly, the angle of visibility scope of opposite side will diminish, when two control voltages one are more than raw voltage values, and one is less than primary voltage
During value, the angle of visibility scope being perpendicular to LCDs both sides all will be enlarged by.
In step S300, two different driving voltages are adjusted control two groups of liquid crystal respectively with generation respectively and divide
Two different steps controlling voltages that son carries out rotating specifically include following steps:
S301, according to raw voltage values and the first predetermined angle, the first driving voltage is carried out size adjustment, to generate control
Make first group of liquid crystal molecule the first control voltage to vertical anticlockwise the first predetermined angle relative to LCDs；
S302, according to raw voltage values and the second predetermined angle, the second driving voltage is carried out size adjustment, to generate control
Make second group of liquid crystal molecule the second control voltage to vertical right rotation the second predetermined angle relative to LCDs..
In step S301 and step S302, the first predetermined angle is to be facing perpendicularly to anticlockwise relative to LCDs
A certain set angle, the second predetermined angle is to be facing perpendicularly to a certain set angle of right rotation, liquid crystal relative to LCDs
The anglec of rotation of molecule is by being added on the battery lead plate on liquid crystal molecule both sides be controlled controlling voltage, different control
The corresponding different direction of rotation of voltage and angle, when we need liquid crystal molecule to deflect the angle that we need to the left or to the right
Time, it is only necessary to correspondingly adjusting the control voltage being added on battery lead plate, in embodiments of the present invention, first controls voltage less than former
Beginning magnitude of voltage, second controls voltage is more than raw voltage values, and when controlling voltage less than raw voltage values, corresponding liquid crystal divides
Son can be to anticlockwise relative to the vertical of LCDs, the liquid crystal molecule phase corresponding when controlling voltage more than primary voltage
Vertical for LCDs can be to right rotation.
Step S400, control two groups of liquid crystal molecules respectively according to two different control voltages and rotate.
In step S400, according to two different controlling voltage and control the step that two groups of liquid crystal molecules carry out rotating respectively
Rapid particularly as follows:
Step S401, according to first control first group of liquid crystal molecule of Control of Voltage to the vertical relative to LCDs
Anticlockwise the first predetermined angle；
Step S402, according to second control second group of liquid crystal molecule of Control of Voltage to the vertical relative to LCDs
Right rotation the second predetermined angle.
In embodiments of the present invention, two different voltages that control are added in LCDs what control liquid crystal rotated respectively
On battery lead plate, liquid crystal molecule distortion under the effect controlling voltage rotates the angle and direction corresponding with controlling voltage, when two groups
Liquid crystal molecule to the left and is carried out to the right relative to the vertical of LCDs to the vertical relative to LCDs respectively
After distortion rotates, the angle of visibility scope of its direction of rotation will be enlarged by.
In embodiments of the present invention, each color inside each picture element of LCDs is to be driven electricity by two
What pressure produced after adjusting controls what voltage was controlled, and each picture element is made up of two groups of identical three primary colories, often organizes three primary colors
Corresponding one group of liquid crystal molecule respectively, has the most i.e. added one (electrode) on the basis of traditional liquid crystal display screen and has controlled voltage and one
Group three primary colors and corresponding with three primary colors one group of liquid crystal molecule, controlled voltage by two and control two groups of liquid crystal molecules respectively respectively
Distortion rotates predetermined angle (the liquid crystal molecule rotation that different control Control of Voltage is corresponding of different (or identical) round about
Different angles, when we need to make liquid crystal molecule be rotated up to the angle that we need, it is only necessary to adjust control accordingly
The size of voltage can realize), as in figure 2 it is shown, such as first controls one group of liquid crystal molecule of Control of Voltage to relative to liquid crystal
Display screen be facing perpendicularly to anticlockwise θ 5 angle, second controls another group liquid crystal molecule of Control of Voltage to relative to LCDs
Be facing perpendicularly to right rotation θ 6 angle, if the angle of visibility of single liquid crystal molecule is 60 °, then user at display screen dead ahead to moving to left
Dynamic θ 5+60 °, or display screen dead ahead moves right θ 6+60 °, still within the scope of the angle of visibility of this picture element, still may be used
To see that the angle of visibility scope of normal image, i.e. LCDs increases θ 6+ θ 5.
Fig. 3 illustrates the modular structure of the device of the raising LCDs angle of visibility scope that the embodiment of the present invention provides, for
It is easy to explanation, only lists part related to the present embodiment.
As one embodiment of the invention, the liquid crystal molecule of LCDs carries out distortion under the control of electrode and rotates, when
When liquid crystal molecule have rotated different angles, light source through colour filter thus shows through after liquid crystal molecule in LCDs again
Show different colors.
In embodiments of the present invention, each picture element of LCDs is formed (three primary colors by two groups of three primary colories respectively
RGB and three primary colors R ' G ' B ', two kinds of three primary colories are identical), these two groups of three primary colories corresponding two groups of liquid crystal molecules respectively, improve liquid
The device 1 of crystal display screen angle of visibility scope includes:
Signal acquiring unit 10, for obtaining the original electricity of the color controlling LCDs in original color image signal
Pressure value；
D/A conversion unit 20, generates two different drivings for raw voltage values carrying out twice digital-to-analogue conversion simultaneously
Voltage；
Voltage regulation unit 30, for according to respectively two different driving voltages are adjusted with generate control respectively
Described two groups of liquid crystal molecules carry out two the different control voltages rotated；
Electrode control unit 40, revolves for controlling two groups of liquid crystal molecules respectively according to two different control voltages
Turn.
In embodiments of the present invention, original color image signal includes the primary voltage controlling each picture element color
Value, and the color controlling each picture element is to be realized by the distortion different angle of rotation controlling liquid crystal molecule；And it is former
Beginning magnitude of voltage is a digital signal, needs to be converted into analogue signal, in embodiments of the present invention, simultaneously to primary voltage
Value carries out digital-to-analogue conversion, generates two different driving voltages；The driving voltage carrying out digital-to-analogue conversion is adjusted by needs
Because carrying out the magnitude of voltage after digital-to-analogue conversion to there is certain difference with raw voltage values, if directly using the first driving voltage
Control two groups of liquid crystal molecules respectively with the second driving voltage to rotate, then the color that final LCDs shows is by distortion
And more serious, in order to avoid this imagination, it is necessary to according to raw voltage values, driving voltage is carried out (size) and adjust production
Control voltage so that it is (control voltage) close to raw voltage values, owing to liquid crystal molecule itself has visible angle (generally 60
Degree), when controlling voltage and being more than raw voltage values or be less than raw voltage values, it is perpendicular to the angle of visibility of LCDs side
Scope will become big, and the angle of visibility scope of opposite side will diminish, when two control voltages one are more than raw voltage values, and one is less than
During raw voltage values, the angle of visibility scope being perpendicular to LCDs both sides all will be enlarged by.
As one embodiment of the invention, D/A conversion unit 20 includes:
First D/A conversion unit 201, generates two groups of liquid of driving for raw voltage values carries out digital-to-analogue conversion for the first time
The first driving voltage that in brilliant molecule, first group of liquid crystal molecule carries out rotating；
Second D/A conversion unit 202, generates two groups of liquid of driving for raw voltage values carries out second time digital-to-analogue conversion
The second driving voltage that in brilliant molecule, second group of liquid crystal molecule carries out rotating.
In embodiments of the present invention, digital-to-analogue conversion is the analogue signal amount that binary digital signal amount is converted to, will input
Each binary digital code be converted into corresponding analog quantity by its weights size, then will represent everybody analog quantity phase
Adding, total analog quantity of gained is directly proportional to digital quantity, concrete, and the analog voltage uo(that is first of output after digital-to-analogue conversion drives
Voltage and the second driving voltage) equal to every each point of corresponding analog voltage sum that digital signal amount code is 1, wherein,
The computing formula that binary digital code is converted into decimal scale analog quantity is as follows:
The analog voltage u of outputoComputing formula as follows:
Wherein, UREFFor reference voltage.
In the embodiment of the present invention, the detailed process of digital-to-analogue conversion is: digital quantity inputs in mould serial or parallel mode, and deposits
In data buffer, the U.S. Digital sum of depositor output drives the electrical switch in corresponding numerical digit, will be in decoding network
The corresponding numerical digit weights obtained send into summing circuit；Every weights are added by summing circuit, just obtain corresponding with digital quantity
Analog quantity.
As one embodiment of the invention, voltage regulation unit includes:
First voltage regulation unit 301, for entering the first driving voltage according to raw voltage values and the first predetermined angle
Row size adjusts, and controls first group of liquid crystal molecule to vertical anticlockwise the first preset angle relative to LCDs to generate
First control voltage of degree；
Second voltage regulation unit 302, for entering the second driving voltage according to raw voltage values and the second predetermined angle
Row size adjusts, and controls second group of liquid crystal molecule to vertical right rotation the second preset angle relative to LCDs to generate
Second control voltage of degree.
In embodiments of the present invention, the first voltage regulation unit 301 and the second voltage regulation unit 302 are actually and pass
GAMMA calibrating installation (circuit) in system LCDs, in embodiments of the present invention, GAMMA calibrating installation is two, respectively
Corresponding first voltage regulation unit 301 and the second voltage regulation unit 302, the first voltage regulation unit 301 and the second voltage are adjusted
The grey exponent number that joint unit 302 can produce respectively is 28Individual, as shown in Figure 4, first voltage regulation unit 301(the second voltage is adjusted
Joint unit 302 is identical with the first voltage regulation unit 301, and the present embodiment only lists the electricity of the first voltage regulation unit 301
Line structure) reference voltage VREFAnd between ground GND, string has 256 precision resistances respectively, and the connection end of any two resistance can
Obtain a magnitude of voltage, utilize this magnitude of voltage obtained that driving voltage is adjusted, due to, in LCDs, liquid
The angle of brilliant molecule rotation twist is all that the size of model-following control voltage is changed, when we need to make it rotate a certain angle
When spending to expand visual range, it is only necessary to the corresponding size adjusting control voltage, and controlling voltage is by the first voltage-regulation list
First driving voltage and the second driving voltage are adjusted obtaining by unit 301 and the second voltage regulation unit 302, and driving voltage
Being to be carried out digital-to-analogue conversion by raw voltage values, this value is unmodifiable, and we are accomplished by by the first voltage-regulation
Unit 301 and the second voltage regulation unit 302 are adjusted, and make two groups of liquid crystal molecules rotate the predetermined angle of its correspondence respectively,
Thus expand the angle of visibility scope of LCDs.As one embodiment of the invention, first controls voltage is less than raw voltage values,
Second controls voltage more than raw voltage values.
In embodiments of the present invention, the first predetermined angle is to be facing perpendicularly to that anticlockwise is a certain to be set relative to LCDs
Determining angle, the second predetermined angle is to be facing perpendicularly to a certain set angle of right rotation relative to LCDs, liquid crystal molecule
The anglec of rotation is by being added on the battery lead plate on liquid crystal molecule both sides be controlled controlling voltage, different control voltage pair
Answer different direction of rotation and angle, when we need liquid crystal molecule to deflect the angle that we need to the left or to the right, only need
Correspondingly to adjust the control voltage being added on battery lead plate, in embodiments of the present invention, first controls voltage less than primary voltage
Value, second controls voltage is more than raw voltage values, and when controlling voltage less than raw voltage values, corresponding liquid crystal molecule is relative
Vertical in LCDs can be to anticlockwise, and the liquid crystal molecule corresponding when controlling voltage more than primary voltage is relative to liquid
The vertical of crystal display screen can be to right rotation.
As one embodiment of the invention, electrode control unit 40 includes:
First electrode control unit 401, for controlling first group of liquid crystal molecule of Control of Voltage to relative to liquid according to first
First predetermined angle described in the vertical anticlockwise of crystal display screen；
Second electrode control unit 402, for controlling second group of liquid crystal molecule of Control of Voltage to relative to liquid according to second
Second predetermined angle described in the vertical right rotation of crystal display screen.
In embodiments of the present invention, each color inside each picture element of LCDs is to be driven electricity by two
What pressure produced after adjusting controls what voltage was controlled, and each picture element is made up of two groups of identical three primary colories, often organizes three primary colors
Corresponding one group of liquid crystal molecule respectively, has the most i.e. added one (electrode) on the basis of traditional liquid crystal display screen and has controlled voltage and one
Group three primary colors and corresponding with three primary colors one group of liquid crystal molecule, controlled voltage by two and control two groups of liquid crystal molecules respectively respectively
Distortion rotates predetermined angle (the liquid crystal molecule rotation that different control Control of Voltage is corresponding of different (or identical) round about
Different angles, when we need to make liquid crystal molecule be rotated up to the angle that we need, it is only necessary to adjust control accordingly
The size of voltage can realize), as in figure 2 it is shown, such as first control one group of liquid crystal molecule of Control of Voltage is to anticlockwise θ 5 angle,
Another group liquid crystal molecule of second control Control of Voltage is to right rotation θ 6 angle, if the angle of visibility of single liquid crystal molecule is 60 °, then
User is moved to the left θ 5+60 ° at display screen dead ahead, or display screen dead ahead moves right θ 6+60 °, still at this pixel
Within the scope of the angle of visibility of point, still it can be seen that the angle of visibility scope of normal image, i.e. LCDs increases θ 6+ θ
5。
The operation principle of the device that embodiment of the present invention offer improves liquid crystal TV set angle of visibility scope below is carried out
Illustrate.
In embodiments of the present invention, colour picture signal was digital signal before being transferred to LCDs, with tradition
Colour picture signal is the same is also the signal of 8bit, controls voltage, by each picture element according to often organizing all corresponding one of three primary colors
The brightest GTG be set to 255, dull gray rank are set to 0, through the first voltage regulation unit 301(the oneth GAMMA calibration cartridge
Put) control voltage after regulation is less than raw voltage values (virtual voltage), and corresponding liquid crystal molecule can be to relative to liquid crystal display
Screen be facing perpendicularly to anticlockwise, through the second voltage regulation unit 302(the 2nd GAMMA calibrating installation) regulation after control voltage
More than raw voltage values (virtual voltage), corresponding liquid crystal molecule can be facing perpendicularly to right rotation to relative to LCDs.
Such as, the color that some picture element A shows is redness, and corresponding raw voltage values (virtual voltage) is 13V, number
Raw voltage values is carried out twice digital-to-analogue conversion simultaneously and generates the first driving voltage and the second driving voltage by mould converting unit 20, raw
The first driving voltage become, be such as 12.5V, owing to the first driving voltage after conversion is with corresponding original of picture element A reality
Magnitude of voltage 13V has different, rotates if directly controlling first group of liquid crystal molecule with the first driving voltage, picture element A
The color of display will be for non-redness (i.e. display distortion), in order to avoid this imagination, the first voltage regulation unit 301(first
GAMMA calibrating installation) it is adjusted obtaining the first control voltage to the first driving voltage according to raw voltage values, make after adjustment
One controls voltage close to raw voltage values, owing to liquid crystal molecule itself has certain visible angle (generally 60 degree), when the
One control voltage close to but during less than raw voltage values, corresponding liquid crystal molecule can be to left-handed relative to LCDs vertical
Turn, but be still able to clearly see the redness of picture element A at LCDs vertical, be perpendicular to liquid crystal display in guarantee
In the case of the color of picture element A can clearly be seen clearly by screen, the first size controlling voltage can be adjusted, due to difference
Control voltage, liquid crystal molecule rotates different angle, when we preset first group of liquid crystal molecule to relative to LCDs
Vertical anticlockwise θ 5 angle, it is necessary to the magnitude of voltage choosing correspondence in the first voltage regulation unit 301 drives electricity to first
Pressure carries out size adjustment, such as chooses 0.495V, and at the Gamma244 in corresponding first voltage regulation unit 301 of 0.495V
Voltage (sees Fig. 4), and voltage at Gamma244 and the first driving voltage 12.5V are the first control voltage 12.995V after being added,
Close to 13V, first group of now corresponding for picture element A liquid crystal molecule is to relative to LCDs vertical left-hand rotation θ 5 angle.
In like manner, the second driving voltage generated after raw voltage values such as carries out second time digital-to-analogue conversion is 12.4V, when
We preset second group of liquid crystal molecule to relative to LCDs vertical right rotation θ 6 angle, it is necessary to adjust at the second voltage
The magnitude of voltage choosing correspondence in joint unit 302 carries out size adjustment to the second driving voltage, such as chooses 0.605V, and 0.605V
Voltage at Gamma228 in corresponding second regulation unit 302, after at Gamma228, voltage and the second driving voltage 12.4V are added
Being the second control voltage 13.005V, close to 13V, second group of now corresponding for picture element A liquid crystal molecule is to relative to liquid crystal display
Screen vertical right-hand rotation θ 6 angle.
Owing to the first two groups of liquid crystal molecules controlling voltage 12.995V and second control voltage 13.005V correspondence control exist
Belonging to same picture element in LCDs, magnitude of voltage is different, and deflection angle is the most variant, thus maintains one
Fixed angular range is outer it can be seen that preferable effect.
In embodiments of the present invention, two are obtained by raw voltage values in colour picture signal is carried out twice digital-to-analogue conversion
Individual control voltage, is adjusted controlling voltage, controls two groups of liquid crystal molecules that each picture element of LCDs is corresponding respectively,
Make the liquid crystal molecule that each picture element of LCDs is corresponding carry out rotation twist under the effect controlling voltage, expand liquid crystal
The angle of visibility scope of display screen, solves the problem that available liquid crystal display screen angle of visibility scope is less.
It will be appreciated by those skilled in the art that the unit included for above-described embodiment is simply carried out according to function logic
Divide, but be not limited to above-mentioned division, as long as being capable of corresponding function；It addition, the tool of each functional unit
Body title also only to facilitate mutually distinguish, is not limited to protection scope of the present invention.
Those of ordinary skill in the art it is also understood that, it is achieved all or part of step in above-described embodiment method is can
Completing instructing relevant hardware by program, described program can be stored in a computer read/write memory medium
In, described storage medium, including ROM/RAM, disk, CD etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (4)
1. the method improving LCDs angle of visibility scope, it is characterised in that each of described LCDs as
Vegetarian refreshments is made up of two groups of three primary colories respectively, described two groups of three primary colories corresponding two groups of liquid crystal molecules, described raising liquid crystal display respectively
The method of screen angle of visibility scope comprises the following steps:
Obtain the raw voltage values of the color controlling described LCDs in original color image signal；
Described raw voltage values is carried out twice digital-to-analogue conversion simultaneously and generates two different driving voltages；
The driving voltage that said two is different is adjusted respectively control described two group liquid crystal molecules with generation respectively revolve
Two the different control voltages turned；
Control described two groups of liquid crystal molecules respectively according to the control voltage that said two is different to rotate；
The described step tool described raw voltage values being carried out twice digital-to-analogue conversion simultaneously and generating two different driving voltages
Body comprises the following steps:
Described raw voltage values carries out the generation of digital-to-analogue conversion for the first time drives first group of liquid crystal in described two groups of liquid crystal molecules to divide
Son carries out the first driving voltage rotated；
Described raw voltage values carries out second time digital-to-analogue conversion generation drives second group of liquid crystal in described two groups of liquid crystal molecules to divide
Son carries out the second driving voltage rotated；
Described being adjusted the driving voltage that said two is different respectively controls described two groups of liquid crystal molecules respectively enter to generate
Two different steps controlling voltages that row rotates specifically include following steps:
Described first driving voltage is carried out size adjustment, to generate control according to described raw voltage values and the first predetermined angle
Described first group of liquid crystal molecule is to relative to first of the first predetermined angle described in the vertical anticlockwise of described LCDs
Control voltage；
Described second driving voltage is carried out size adjustment, to generate control according to described raw voltage values and the second predetermined angle
Described second group of liquid crystal molecule is to relative to second of the second predetermined angle described in the vertical right rotation of described LCDs
Control voltage；
Described first controls voltage is less than the analogue value corresponding to described raw voltage values, and described second controls voltage more than described
The analogue value corresponding to raw voltage values.
2. the method improving LCDs angle of visibility scope as claimed in claim 1, it is characterised in that described in described basis
Two different controls voltage and controls the step that described two groups of liquid crystal molecules carry out rotating respectively and specifically include following steps:
First group of liquid crystal molecule described in Control of Voltage is controlled to the vertical relative to described LCDs according to described first
First predetermined angle described in anticlockwise；
Second group of liquid crystal molecule described in Control of Voltage is controlled to the vertical relative to described LCDs according to described second
Second predetermined angle described in right rotation.
3. the device improving LCDs angle of visibility scope, it is characterised in that each of described LCDs as
Vegetarian refreshments is made up of two groups of three primary colories respectively, described two groups of three primary colories corresponding two groups of liquid crystal molecules, described raising liquid crystal display respectively
The device of screen angle of visibility scope includes:
Signal acquiring unit, for obtaining the primary voltage of the color controlling described LCDs in original color image signal
Value；
D/A conversion unit, generates two different drivings electricity for described raw voltage values carrying out twice digital-to-analogue conversion simultaneously
Pressure；
Voltage regulation unit, is used for being adjusted the driving voltage that said two is different respectively controlling described two respectively to generate
Group liquid crystal molecule carries out two the different control voltages rotated；
Electrode control unit, revolves for controlling described two groups of liquid crystal molecules respectively according to the control voltage that said two is different
Turn；
Described D/A conversion unit includes:
First D/A conversion unit, generates the described two groups of liquid of driving for described raw voltage values carries out digital-to-analogue conversion for the first time
The first driving voltage that in brilliant molecule, first group of liquid crystal molecule carries out rotating；
Second D/A conversion unit, generates the described two groups of liquid of driving for described raw voltage values carries out second time digital-to-analogue conversion
The second driving voltage that in brilliant molecule, second group of liquid crystal molecule carries out rotating；
Described voltage regulation unit includes:
First voltage regulation unit, for entering described first driving voltage according to described raw voltage values and the first predetermined angle
Row size adjusts, and controls described first group of liquid crystal molecule to the vertical anticlockwise institute relative to described LCDs to generate
State the first control voltage of the first predetermined angle；
Second voltage regulation unit, for entering described second driving voltage according to described raw voltage values and the second predetermined angle
Row size adjusts, and controls described second group of liquid crystal molecule to the vertical right rotation institute relative to described LCDs to generate
State the second control voltage of the second predetermined angle；
Described first controls voltage is less than the analogue value corresponding to described raw voltage values, and described second controls voltage more than described
The analogue value corresponding to raw voltage values.
4. the device improving LCDs angle of visibility scope as claimed in claim 3, it is characterised in that described electrode controls
Unit includes:
First electrode control unit, for controlling first group of liquid crystal molecule described in Control of Voltage to relative to institute according to described first
State the first predetermined angle described in the vertical anticlockwise of LCDs；
Second electrode control unit, for controlling second group of liquid crystal molecule described in Control of Voltage to relative to institute according to described second
State the second predetermined angle described in the vertical right rotation of LCDs.
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| CN109448654B (en) * | 2018-12-20 | 2021-02-23 | 深圳Tcl新技术有限公司 | Method for adjusting visual angle of liquid crystal display, liquid crystal display and storage medium |
| CN109491114A (en) * | 2019-01-10 | 2019-03-19 | 深圳市聚美通用科技有限公司 | A kind of adjusting method of liquid crystal display visible angle |
| CN111028808B (en) | 2019-12-24 | 2021-10-08 | 惠州市华星光电技术有限公司 | Method, device and system for adjusting brightness and visual angle of liquid crystal panel and display device |
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| US5847688A (en) * | 1993-10-20 | 1998-12-08 | Nec Corporation | Liquid crystal display apparatus having an increased viewing angle |
| US6160532A (en) * | 1997-03-12 | 2000-12-12 | Seiko Epson Corporation | Digital gamma correction circuit, gamma correction method, and a liquid crystal display apparatus and electronic device using said digital gamma correction circuit and gamma correction method |
| CN102769768A (en) * | 2011-05-06 | 2012-11-07 | 乐金显示有限公司 | Image display device |
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| JP3999081B2 (en) * | 2002-01-30 | 2007-10-31 | シャープ株式会社 | Liquid crystal display |
| TWI253054B (en) * | 2004-10-29 | 2006-04-11 | Chi Mei Optoelectronics Corp | Color display |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5847688A (en) * | 1993-10-20 | 1998-12-08 | Nec Corporation | Liquid crystal display apparatus having an increased viewing angle |
| US6160532A (en) * | 1997-03-12 | 2000-12-12 | Seiko Epson Corporation | Digital gamma correction circuit, gamma correction method, and a liquid crystal display apparatus and electronic device using said digital gamma correction circuit and gamma correction method |
| CN102769768A (en) * | 2011-05-06 | 2012-11-07 | 乐金显示有限公司 | Image display device |
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