CN106526974A - Method and system for adjusting optical uniformity of liquid crystal modules - Google Patents
Method and system for adjusting optical uniformity of liquid crystal modules Download PDFInfo
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- CN106526974A CN106526974A CN201611271320.6A CN201611271320A CN106526974A CN 106526974 A CN106526974 A CN 106526974A CN 201611271320 A CN201611271320 A CN 201611271320A CN 106526974 A CN106526974 A CN 106526974A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a method for adjusting the optical uniformity of liquid crystal modules. The liquid crystal modules comprise LED light source matrixes, optical films and liquid crystal display screens. The LED light source matrixes face the optical films; each liquid crystal display screen is arranged on the side, which is deviated from the corresponding LED light source matrix, of the corresponding optical film; and a light emergent side is arranged on the side, which is deviated from the corresponding LED light source matrix, of each optical film. The method for adjusting the optical uniformity of the liquid crystal modules includes steps of acquiring brightness values of each surface light source region of each optical film; determining first brightness compensation coefficients of each LED light source according to the brightness values of the corresponding surface light source region; adjusting the brightness of each surface light source region on the corresponding optical film according to the first brightness compensation coefficients of the corresponding LED light source so as to balance the optical uniformity of the liquid crystal modules. The invention further provides a system for adjusting the optical uniformity of the liquid crystal modules. According to the technical scheme, the method and the system have effect of improving optical uniformity of liquid crystal display screens.
Description
Technical field
The present invention relates to liquid crystal module technical field, more particularly to a kind of liquid crystal module optical homogeneity control method and liquid
Brilliant module optical homogeneity regulating system.
Background technology
Liquid crystal module is the display unit of LCD TV.In prior art, liquid crystal module is by LED light source component, blooming
Piece and LCDs (Liquid Crystal Display, LCD) composition, each LED/light source are formed after blooming piece
With the area source corresponding to LCDs pixel planes, due to the rigging error of the otherness and blooming piece of LED/light source, with
And the guiding property of optical parametric (for example, light intensity or light type), LED location and blooming piece of LED/light source etc. is many-sided discrete
The impact of factor, causes the area source of the zones of different for inciding liquid crystal display screen surfaces to there is light-intensity difference.
The drawbacks of above-mentioned technical proposal is that the optical homogeneity of LCDs is not good.
The content of the invention
Present invention is primarily targeted at providing a kind of liquid crystal module optical homogeneity control method, it is intended to improve liquid crystal
The optical homogeneity of display screen.
For achieving the above object, the present invention provides a kind of liquid crystal module optical homogeneity control method, the liquid crystal module
Including LED light source matrix and blooming piece in the face of arranging, and located at the blooming piece away from the LED light source matrix
The LCDs of side, the side away from the LED light source matrix of the blooming piece is light emission side, the liquid crystal module
Optical homogeneity control method comprises the steps：
Obtain the brightness value in each area source area on the blooming piece；
According to the brightness value in each area source area, the first luminance compensation coefficient of each LED/light source is determined；
According to the first luminance compensation coefficient of each LED/light source, each described face light on the blooming piece is adjusted
The brightness of source region, with the optical homogeneity of the balanced liquid crystal module.
Preferably, also include before the brightness value in each area source area on the acquisition blooming piece：
Obtain the light source arranging rule of the LED light source matrix；
According to the light source arranging rule, the blooming piece is carried out into subregion, to obtain comprising several area source areas
The first matrix, the same position in the area source area of each in first matrix, with the LED light source matrix
The normal direction light projected area correspondence of LED/light source, or the throwing of the virtual light source formed between the LED/light source adjacent with two
Penetrate region correspondence.
Preferably, the liquid crystal module optical homogeneity control method, also includes：
Obtain the brightness value of each pixel region on the LCDs；
According to the brightness value of each pixel region, the second luminance compensation coefficient of each pixel region is determined；
According to the second luminance compensation coefficient, the brightness of each pixel region on the LCDs is adjusted.
Preferably, also include before the brightness value of each pixel region on the acquisition LCDs：
Obtain the light source arranging rule of the LED light source matrix；
According to the light source arranging rule, the LCDs is carried out into pixel partitions, to obtain comprising several pictures
Second matrix in plain region, each the described pixel region in second matrix are and identical in the LED light source matrix
The normal direction light projected area correspondence of the LED/light source of position, or the virtual optical formed between the LED/light source adjacent with two
The projected area correspondence in source.
Preferably, the first luminance compensation coefficient according to each LED/light source, adjusts every on the blooming piece
The brightness in the individual area source area, including：
Obtain photoelectric conversion factors, initial duty cycle data and the driving current of each LED/light source；
According to the first luminance compensation coefficient and the initial duty cycle data of each LED/light source, it is calculated every
The compensation duty cycle data of one LED/light source；
According to the photoelectric conversion factors, the compensation duty cycle data and the driving current, the blooming is adjusted
The brightness in each area source area on piece.
Additionally, for achieving the above object, the present invention also provides a kind of liquid crystal module optical homogeneity regulating system, the liquid
Brilliant module includes the LED light source matrix and blooming piece in the face of arranging, and located at the blooming piece away from the LED light
The LCDs of source matrix side, the side away from the LED light source matrix of the blooming piece is light emission side, the liquid
Brilliant module optical homogeneity regulating system includes：
Acquisition module, for obtaining the brightness value in each area source area on the blooming piece；
Determining module, for the brightness value according to each area source area, determines that the first of each LED/light source is bright
Degree penalty coefficient；
Adjustment module, for the first luminance compensation coefficient according to each LED/light source, is adjusted on the blooming piece
The brightness in each area source area, with the optical homogeneity of the balanced liquid crystal module.
Preferably, the acquisition module, is further used for：
Obtain the light source arranging rule of the LED light source matrix；
The liquid crystal module optical homogeneity regulating system, also includes：
First division module, for according to the light source arranging rule, the blooming piece being carried out subregion, to be wrapped
The first matrix containing several area source areas, the area source area of each in first matrix, with the LED/light source square
The normal direction light projected area correspondence of the LED/light source of the same position in battle array, or shape between the LED/light source adjacent with two
Into virtual light source projected area correspondence.
Preferably, the acquisition module is further used for：Obtain the brightness of each pixel region on the LCDs
Value；
The determining module is further used for：According to the brightness value of each pixel region, each described pixel is determined
The second luminance compensation coefficient in region；
The adjustment module is further used for：According to the second luminance compensation coefficient, adjust on the LCDs
The brightness of each pixel region.
Preferably, the acquisition module is further used for：Obtain the light source arranging rule of the LED light source matrix；
The liquid crystal module optical homogeneity regulating system, also includes：
Second division module, for according to the light source arranging rule, the LCDs being carried out pixel partitions, with
The second matrix comprising several pixel regions is obtained, each described pixel region in second matrix, with the LED
The normal direction light projected area correspondence of the LED/light source of the same position in light source matrix, or the LED/light source adjacent with two
Between formed virtual light source projected area correspondence.
Preferably, the adjustment module includes：
Acquiring unit, for obtaining photoelectric conversion factors, initial duty cycle data and the driving of each LED/light source
Electric current；
Computing unit, for the first luminance compensation coefficient and the initial duty cycle number according to each LED/light source
According to being calculated the compensation duty cycle data of each LED/light source；
Adjustment unit, for according to the photoelectric conversion factors, the compensation duty cycle data and the driving current, adjusting
Save the brightness in each area source area on the blooming piece.
In the inventive solutions, the liquid crystal module optical homogeneity is adjusted by obtaining on the blooming piece
The brightness value in each area source area, according to the brightness value in each area source area, determines that the first of each LED/light source is bright
Degree penalty coefficient, according to the first luminance compensation coefficient of each LED/light source, adjusts each described face on the blooming piece
The brightness of light source region, with the optical homogeneity of the balanced liquid crystal module, therefore, mended by adjusting the first brightness of LED/light source
Coefficient is repaid, the brightness value in each area source area can be effectively adjusted, so as to improve the optical homogeneity of LCDs.
Description of the drawings
Fig. 1 is the schematic flow sheet of liquid crystal module optical homogeneity control method first embodiment of the present invention；
Fig. 2 is liquid crystal module group backlight light path schematic diagram in liquid crystal module optical homogeneity control method of the present invention；
Fig. 3 is the schematic flow sheet of liquid crystal module optical homogeneity control method second embodiment of the present invention；
Fig. 4 is each pixel region and LED light on LCDs in liquid crystal module optical homogeneity control method of the present invention
The mapping projections schematic diagram in source；
Fig. 5 is the schematic flow sheet of liquid crystal module optical homogeneity control method 3rd embodiment of the present invention；
Fig. 6 is the LED/light source brightness correction block diagram in liquid crystal module optical homogeneity control method of the present invention；
Fig. 7 is the schematic flow sheet of liquid crystal module optical homogeneity control method fourth embodiment of the present invention；
Fig. 8 is the schematic flow sheet of the 5th embodiment of liquid crystal module optical homogeneity control method of the present invention；
Fig. 9 is the backlight LED dot matrix distribution schematic diagram in liquid crystal module optical homogeneity control method of the present invention；
Figure 10 is the LCDs brightness correction block diagram in liquid crystal module optical homogeneity control method of the present invention；
Figure 11 is the LCD backlight area source distribution schematic diagram in liquid crystal module optical homogeneity control method of the present invention；
Figure 12 is the shop equipment connection diagram in liquid crystal module optical homogeneity control method of the present invention；
Figure 13 is the high-level schematic functional block diagram of liquid crystal module optical homogeneity regulating system first embodiment of the present invention；
Figure 14 is the high-level schematic functional block diagram of liquid crystal module optical homogeneity regulating system second embodiment of the present invention；
Figure 15 is the high-level schematic functional block diagram of liquid crystal module optical homogeneity regulating system fourth embodiment of the present invention；
Figure 16 is the high-level schematic functional block diagram of the 5th embodiment of liquid crystal module optical homogeneity regulating system of the present invention.
The object of the invention is realized, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
Should understand, specific embodiment described herein only to explain the present invention, is not intended to limit the present invention.
The present invention provides a kind of liquid crystal module optical homogeneity control method.
Fig. 1 is referred to, for achieving the above object, the first embodiment of the present invention provides a kind of liquid crystal module optical homogeneity
Control method, the liquid crystal module include the LED light source matrix and blooming piece in the face of arranging, and are located at the blooming piece
The LCDs away from the LED light source matrix side, the side away from the LED light source matrix of the blooming piece
For light emission side, the liquid crystal module optical homogeneity control method comprises the steps：
Step S10, obtains the brightness value in each area source area on the blooming piece；
Step S20, according to the brightness value in each area source area, determines that the first brightness of each LED/light source is mended
Repay coefficient；
Step S30, according to the first luminance compensation coefficient of each LED/light source, adjusts each on the blooming piece
The brightness in the area source area, with the optical homogeneity of the balanced liquid crystal module.
In the inventive solutions, the liquid crystal module optical homogeneity is adjusted by obtaining on the blooming piece
The brightness value in each area source area, according to the brightness value in each area source area, determines that the first of each LED/light source is bright
Degree penalty coefficient, according to the first luminance compensation coefficient of each LED/light source, adjusts each described face on the blooming piece
The brightness of light source region, with the optical homogeneity of the balanced liquid crystal module, therefore, mended by adjusting the first brightness of LED/light source
Coefficient is repaid, the brightness value in each area source area can be effectively adjusted, so as to improve the optical homogeneity of LCDs.
Refer to two adjacent LED/light sources in the LED light source matrix that Fig. 2, LED1 and LED2 are LCD TVs.L1,
L2, L3, L4 and L5 are the light that LED1 sends, and the light initially passes through the blooming piece, then coordinates liquid crystal light valve to be imaged；L1 ',
L2 ', L3 ', L4 ' and L5 ' is LED2 emitted lights, initially passes through the blooming piece, then coordinates liquid crystal light valve to be imaged.
L4 and L5 are that the side of LED1 goes out light, and corresponding LCDs region is EDGE1 AREA.L3 is the method for LED1
The light in line direction, corresponding LCDs region are V1 AREA.
L2 and L1 are that the side of LED1 goes out light, and L5 ' and L4 ' is that the side of LED2 goes out light, corresponding LCDs region
For COMMON AREA.
L3 ' is the light of the normal direction of LED2, and corresponding LCDs region is V2 AREA.
L1 ' and L2 ' are that the side of LED2 goes out light, and corresponding LCDs region is EDGE2 AREA.
The area source area is multiple light sources of each LED/light source in the incident side or light emission side formation of the blooming piece
Area, the LED/light source form flat with the pixel of LCD screen in the light emission side of the blooming piece after the blooming piece
Planar light source corresponding to face, the optical parametric (for example, light intensity or light type) of LED/light source, LED location and the blooming piece
The impact of the many-side discrete factor such as guiding property, the planar light source of the zones of different for causing to incide liquid crystal display screen surfaces
There is light-intensity difference, the display image for ultimately resulting in LCDs has brightness disproportionation phenomenon.
The circuit signal processing method provided by the present invention, can carry out luminance difference correction to LED/light source, so as to have
Imitate the optical homogeneity of the balanced liquid crystal module.
The LED light source matrix includes the LED/light source in N rows × M column distributions, wherein, N ＞ 0, and M ＞ 0.
Fig. 3 is referred to, it is based on the first embodiment of the liquid crystal module optical homogeneity control method of the present invention, of the invention
In the second embodiment of liquid crystal module optical homogeneity control method, before step S10, also include：
Step S40, obtains the light source arranging rule of the LED light source matrix；
The blooming piece according to the light source arranging rule, is carried out subregion, to obtain comprising several by step S50
First matrix in area source area, the area source area of each in first matrix, with the phase in the LED light source matrix
With position LED/light source normal direction light projected area correspondence, or formed between the LED/light source adjacent with two it is virtual
The projected area correspondence of light source.
The light source arranging rule refers to the LED light of often capable LED/light source quantity and each column in the LED light source matrix
Source quantity, further, can also include the spacing of two adjacent LEDs light source.According to the arrangement of the LED light source matrix,
The incident side or light emission side of the blooming piece are divided into into the first matrix.
Refer to Fig. 4, the pixel resolution of the LCDs is X × Y, the LED light source matrix includes N × M
LED/light source, forms a virtual optical source point between each two LED/light source, meanwhile, the surrounding of the blooming piece is also surround respectively
A line edge region, therefore, the blooming piece can be divided into the individual area source areas of (2N+1) × (2M+1).
The LED of the same position in each described area source area, with the LED light source matrix in first matrix
Light source normal direction light projected area (being hereafter referred to as the first LED light source region) correspondence, or the LED/light source adjacent with two it
Between formed virtual light source projected area (being hereafter referred to as the first virtual optical source region) correspondence.
Fig. 5 is referred to, it is based on the first embodiment of the liquid crystal module optical homogeneity control method of the present invention, of the invention
In the 3rd embodiment of liquid crystal module optical homogeneity control method, the liquid crystal module optical homogeneity control method is also wrapped
Include：
Step S60, obtains the brightness value of each pixel region on the LCDs；
Step S70, according to the brightness value of each pixel region, determines that the second brightness of each pixel region is mended
Repay coefficient；
Step S80, according to the second luminance compensation coefficient, adjusts each described pixel region on the LCDs
Brightness.
Fig. 6 is referred to, the circuit signal processing method that the present invention is provided not only can carry out luminance difference to LED/light source
Correction, can also correct to the light source of the plane of incidence of LCDs, by two kinds of antidotes, can be by liquid crystal display
The luminance uniformity of screen brings up to more than 85%.
Each pixel region includes multiple pixels.
The blooming piece is divided into the individual area source areas of (2N+1) × (2M+1), and accordingly, the LCDs can also
It is divided into the individual pixel regions of (2N+1) × (2M+1).
The brightness of each pixel region on the LCDs is Ipixel=Datapixel×IBL, wherein Datapixel
For the driving data of the pixel region, IBLIt is the light intensity value in each the area source area from the blooming piece out.It is described
Luminance difference at blooming piece, makes each I corresponding to pixel region window on the LCDsBLValue is different, because
In the case of this drive signal identical, the I of each pixelpixelDifferent, the image conformity on the LCDs is deteriorated.
This patent is bright to reach compensation optics by the driving data for correcting each pixel region on the LCDs
Degree difference defect, the driving data correction formula of each pixel region is Ipixel=(Kposition×Datapixel)×IBL.Wherein,
KpositionFor the penalty coefficient of the driving data of the pixel region, KpositionIt is according to each pixel on the LCDs
The calculated constant value of actual measurement luminance difference in region.As each described there is a K in pixel regionpositionValue,
Therefore, for the whole LCDs, there is the K that penalty coefficient quantity is (2N+1) × (2M+1)positionArray.
By KpositionThe driving data of each pixel region described in adjusting, can pass through the upper each of adjustable liquid crystal display display screen
The light valve of individual pixel region is realized.
LED intrinsic brightnesses discreteness and the backlight defect such as LED array layout is uneven, can pass through the method for the invention
Compensation is modified, to ensure the brightness uniformity of liquid crystal module.
For the different pixels region on the LCDs, KpositionPreparation method it is incomplete same, for every
Individual pixel region, KpositionPreparation method it is as follows：
1st, from the point of view of actual light optical effect, there is no LED light in the pixel region EDGE AREA of LCDs surrounding
Between brightness superposition problem.In the present embodiment, measuring and calculation is not carried out to the penalty coefficient in this partial pixel region, directly
Meet the K for quoting the adjacent pixel region of the pixel regionposition.Wherein, the adjacent pixel region of the pixel region can be with
It is region corresponding with the LED light source position or region corresponding with virtual light source.
2nd, in addition to the peripheral pixel area at four edge of upper and lower, left and right of LCDs, there remains positioned at screen
The middle individual pixel regions of (2N-1) × (2M-1), the K of the individual pixel regions of (2N-1) × (2M-1)positionValue is to need to survey
Examination calculate obtain, as shown in Fig. 2 the light source partition corresponding to (2N-1) in the middle of screen × (2M-1) pixel region mainly by
First LED light source region and the first virtual light source district's groups into；
3rd, the brightness I of each first LED light source region and the first virtual optical source regionposition, it is by high-precision luminance test
The relevant position brightness of instrument test combined diaphragm is obtained；
4th, the K of each pixel regionpositionThe computing formula of penalty coefficient is：Kposition=Imin/Iposition, wherein
Imin=Min (I1, I2..., I(2N-1)(2M-1)), i.e. IminFor the minimum of the brightness value of each pixel region on the LCDs
Value.
It should be noted that I hereinminFor providing a reference standard for the brightness value of pixel region each described,
By obtaining the brightness value of each pixel region and the difference of the reference standard, you can obtain the driving data of each pixel region
Penalty coefficient.The reference standard is not limited in Imin, in fact, the reference standard could alternatively be I1, I2...,
I(2M-1)(2N-1)In any one, or I1, I2..., I(2M-1)(2N-1)Average, or even arbitrary constant value can also be used.
By the penalty coefficient array of (2N-1) at LCDs center × (2M-1) subregions, correction formula I is applied topixel
=(Kposition×Datapixel)×IBLIn, so that the correction of brightness is realized in the DSP processing modules of LCD drive circuits.
In Fig. 6, module D1 is LED luminance signal processing module, mainly completes the modulation function of LED drive signal.In Fig. 6
D2 is signal transmission module, is that between module D3, signal connects bus shown in module D1 to Fig. 6 shown in Fig. 6.Module D3 shown in Fig. 6
It is the drive module of LED, is the driving drive module of constant current, while the modulation function of electric current and current duty cycle is also supported,
Hold electric current and voltage detecting function etc..D4 modules shown in Fig. 6, are the driving current passages of LED, it is illustrated that for the electricity of a LED
Circulation road, but this patent supports multichannel (many electric currents) LED drive patterns.D5 shown in Fig. 6 is the supply module of LED, is carried
For the Current Voltage needed for backlight LED.This kind of correction mode is primarily suitable for single lamp correction loop of LOCAL-DIMMING.
Fig. 7 is referred to, it is based on the 3rd embodiment of the liquid crystal module optical homogeneity control method of the present invention, of the invention
In the fourth embodiment of liquid crystal module optical homogeneity control method, before step S50, also include：
Step S90, obtains the light source arranging rule of the LED light source matrix；
The LCDs according to the light source arranging rule, is carried out pixel partitions, to be included by step S100
Second matrix of several pixel regions, each described pixel region in second matrix, with the LED light source matrix
In same position LED/light source normal direction light projected area correspondence, or between the LED/light source adjacent with two formed
Virtual light source projected area correspondence.
The light source arranging rule refers to the LED light of often capable LED/light source quantity and each column in the LED light source matrix
Source quantity, further, can also include the spacing of two adjacent LEDs light source.According to the arrangement of the LED light source matrix,
The LCDs is divided into into the second matrix including several pixel regions.
The pixel resolution of the LCDs is X × Y, and the LED light source matrix includes N × M LED/light source, often
A virtual optical source point is formed between two LED/light sources, meanwhile, the surrounding of the LCDs is also respectively around a line edge
Region, therefore, the LCDs can be divided into the individual pixel regions of (2N+1) × (2M+1).
The LED of the same position in each the described pixel region in second matrix, with the LED light source matrix
Light source normal direction light projected area (being hereafter referred to as the first LED light source region) correspondence, or the LED/light source adjacent with two it
Between formed virtual light source projected area (being hereafter referred to as the first virtual optical source region) correspondence.
Fig. 8 is referred to, the first embodiment based on the liquid crystal module optical homogeneity control method of the present invention is real to the 4th
Any one in example is applied, in the 5th embodiment of the liquid crystal module optical homogeneity control method of the present invention, step S30 bag
Include：
Step S31, obtains photoelectric conversion factors, initial duty cycle data and the driving current of each LED/light source；
Step S32, according to the first luminance compensation coefficient and the initial duty cycle data of each LED/light source, meter
Calculation obtains the compensation duty cycle data of each LED/light source；
Step S33, according to the photoelectric conversion factors, the compensation duty cycle data and the driving current, adjusts institute
State the brightness in each area source area on blooming piece.
The light-intensity difference of LED/light source itself, can directly adjust the LED drive current of LB, realize that optical homogeneity is adjusted
It is whole.
Fig. 9 to Figure 12 is referred to, in the present embodiment, using formula ILED(n,m)=KLED(n,m)×(KLED-DUTY×DUTY)
×CURRENTLED(n,m)To adjust the difference of each LED/light source.Wherein, n and m is respectively in the LED light source matrix
Row data and column data, KLED(n,m)For n rows, the electro-optic conversion coefficient of the LED power of m row (this is a relatively-stationary value,
In the present embodiment, by KLED(n,m)As constant process), (KLED-DUTY× DUTY) be one compensation after duty cycle data,
CURRENTLED(n,m)It is n rows, the driving current of the LED power of m row；The strong penalty coefficient K of LED light in this patentLED-DUTYIt is basis
The strong brightness value of actual measurement LED light in Figure 11 in LED array, calculates according to average algorithm.
KLED(n,m)Can be according to the K in the embodiment of the present invention threepositionMeasuring method is obtained.That is, KLED(n,m)Can
It is calculated with the brightness value by the area source area in the incident side or light emission side on the blooming piece, but, carry out
Iposition' only with the normal direction light corresponding region of the LED/light source, and do not adopt the corresponding region of virtual light source.
KLED(n,m)=Imin’/Iposition', wherein Imin'=Min (I1', I2' ..., I(2N-1)(2M-1)'), i.e. Imin' for institute
State the minimum of a value of the brightness value in each area source area on blooming piece.It should be noted that I hereinmin' for for each institute
The brightness value for stating area source area provides a reference standard, by the brightness value and the reference standard that obtain each area source area
Difference, you can obtain the penalty coefficient in each area source area.The reference standard is not limited in Imin', in fact, the ginseng
Sighting target standard could alternatively be I1', I2' ..., I(2N-1)(2M-1)' in any one, or I1', I2' ..., I(2N-1)(2M-1)'
Average, or even arbitrary constant value can also be used.
If Figure 10 is LCDs brightness correction block diagram.In Figure 10, DD1 modules are the signal processing module of external input,
The preprocessing function of the picture signals such as decoding, the space conversion including picture signal, image quality optimization.DD2 modules in Figure 10, are letter
Number transport module is DD2 modules to the signal transmission bus between DD3, including image data bus, order controlling bus etc..
In Figure 10, DD3 modules are LCDs drive module, mainly complete to drive the pixel that picture signal changes into LCDs
The function of dynamic signal；According to Figure 11, liquid crystal display screen valid pixel is divided into into (2N+1) × (2M+1) subregions, each
The luminance compensation formula of pixel is Ipixel=(Kposition×Datapixel)×IBL,KpositionFor penalty coefficient, DatapixelFor
Driving data, IBLFor each pixel region brightness；The wherein subregion in four border area domain of screen and LED nearby(n,m)Using identical
Compensation coefficient；Backoff algorithm of the present invention realized by the DSP in DD3 modules in Figure 10, makes whole screen show uniformity
More than 85% can be reached.DD4 modules shown in Figure 10 is the drive signal transport module of LCDs, be connection DD3 and
Signal bus module between LCDs, including GATE buses, SOURCE buses etc..This kind of antidote, not only fits
For direct-type backlight, side entrance back is also applied for.
The penalty coefficient that the backlight surface light source of LED luminance penalty coefficient and LCDs is previously mentioned in this patent is in reality
Test in border factory assembling process and obtain.Figure 12 is shop equipment connection figure.(1) LED corrections parameter, is assembled in liquid crystal module
The LED lamp bar stage completes；Every LEDs normal luminous intensity is tested respectively with luminance test instrument, and this data is passed by data communication line 1
Pass producing line computer；Computer is according to the every LEDs monochrome information for obtaining and drives duty cycle information, is obtained by mean compensation algorithm method
Every lamp dutycycle penalty coefficient KLED-DUTY；And by this KLED-DUTYCoefficient is cured to LED luminance signal by programming data wire 1
In the memory of processing module D1, the luminance compensation function of LED lamp bead is realized.(2) the correction parameter of backlight surface light source, is in liquid
Brilliant module assembling closes what the blooming piece stage completed；The brightness of each subregion of blooming piece is tested respectively with luminance test instrument, this
Data pass to producing line computer by data communication line 2；Each the subregion monochrome information of computer according to acquisition, by mean compensation algorithm
Method obtains each partition compensation COEFFICIENT KLED-DUTY；And by this KLED-DUTYCoefficient is cured to liquid crystal display by programming data wire 2
In the memory of screen drive module DD3, LCDs display brightness compensation function is realized.
DSP multiplication function of the present invention using the signal transacting of LCD drive modules, compensates LED light source array brightness disproportionation
Defect, reached lifted liquid crystal module show uniformity purpose；LED light component is realized using the LED drive circuit of LB
Brightness adjustment, to balance the luminance difference of LED component, so as to improve optical homogeneity.
Additionally, referring to Figure 13, for achieving the above object, the first embodiment of the present invention provides a kind of liquid crystal module optics
Uniformity regulating system, the liquid crystal module include the LED light source matrix and blooming piece in the face of arranging, and are located at the light
Learn diaphragm the LCDs away from the LED light source matrix side, the blooming piece away from the LED light source matrix
Side be light emission side, the liquid crystal module optical homogeneity regulating system includes：
Acquisition module 10, for obtaining the brightness value in each area source area on the blooming piece；
Determining module 20, for the brightness value according to each area source area, determines the first of each LED/light source
Luminance compensation coefficient；
Adjustment module 30, for the first luminance compensation coefficient according to each LED/light source, adjusts the blooming piece
The brightness in upper each area source area, with the optical homogeneity of the balanced liquid crystal module.
In the inventive solutions, the liquid crystal module optical homogeneity is adjusted by obtaining on the blooming piece
The brightness value in each area source area, according to the brightness value in each area source area, determines that the first of each LED/light source is bright
Degree penalty coefficient, according to the first luminance compensation coefficient of each LED/light source, adjusts each described face on the blooming piece
The brightness of light source region, with the optical homogeneity of the balanced liquid crystal module, therefore, mended by adjusting the first brightness of LED/light source
Coefficient is repaid, the brightness value in each area source area can be effectively adjusted, so as to improve the optical homogeneity of LCDs.
Refer to two adjacent LED/light sources in the LED light source matrix that Fig. 2, LED1 and LED2 are LCD TVs.L1,
L2, L3, L4 and L5 are the light that LED1 sends, and the light initially passes through the blooming piece, then coordinates liquid crystal light valve to be imaged；L1 ',
L2 ', L3 ', L4 ' and L5 ' is LED2 emitted lights, initially passes through the blooming piece, then coordinates liquid crystal light valve to be imaged.
L4 and L5 are that the side of LED1 goes out light, and corresponding LCDs region is EDGE1 AREA.L3 is the method for LED1
The light in line direction, corresponding LCDs region are V1 AREA.
L2 and L1 are that the side of LED1 goes out light, and L5 ' and L4 ' is that the side of LED2 goes out light, corresponding LCDs region
For COMMON AREA.
L3 ' is the light of the normal direction of LED2, and corresponding LCDs region is V2 AREA.
L1 ' and L2 ' are that the side of LED2 goes out light, and corresponding LCDs region is EDGE2 AREA.
The area source area is multiple light sources of each LED/light source in the incident side or light emission side formation of the blooming piece
Area, the LED/light source form flat with the pixel of LCD screen in the light emission side of the blooming piece after the blooming piece
Planar light source corresponding to face, the optical parametric (for example, light intensity or light type) of LED/light source, LED location and the blooming piece
The impact of the many-side discrete factor such as guiding property, the planar light source of the zones of different for causing to incide liquid crystal display screen surfaces
There is light-intensity difference, the display image for ultimately resulting in LCDs has brightness disproportionation phenomenon.
The circuit signal processing method provided by the present invention, can carry out luminance difference correction to LED/light source, so as to have
Imitate the optical homogeneity of the balanced liquid crystal module.
The LED light source matrix includes the LED/light source in N rows × M column distributions, wherein, N ＞ 0, and M ＞ 0.
Based on the first embodiment of the liquid crystal module optical homogeneity regulating system of the present invention, the liquid crystal module light of the present invention
Learn in the second embodiment of uniformity regulating system, the acquisition module 10 is further used for：
Obtain the light source arranging rule of the LED light source matrix；
Figure 14 is referred to, the liquid crystal module optical homogeneity regulating system also includes：
First division module 40, for according to the light source arranging rule, the blooming piece being carried out subregion, to obtain
The first matrix comprising several area source areas, the area source area of each in first matrix, with the LED/light source
The normal direction light projected area correspondence of the LED/light source of the same position in matrix.
The light source arranging rule refers to the LED light of often capable LED/light source quantity and each column in the LED light source matrix
Source quantity, further, can also include the spacing of two adjacent LEDs light source.According to the arrangement of the LED light source matrix,
The incident side or light emission side of the blooming piece are divided into into the first matrix.
Refer to Fig. 4, the pixel resolution of the LCDs is X × Y, the LED light source matrix includes N × M
LED/light source, forms a virtual optical source point between each two LED/light source, meanwhile, the surrounding of the blooming piece is also surround respectively
A line edge region, therefore, the blooming piece can be divided into the individual area source areas of (2N+1) × (2M+1).
The LED of the same position in each described area source area, with the LED light source matrix in first matrix
Light source normal direction light projected area (being hereafter referred to as the first LED light source region) correspondence, or the LED/light source adjacent with two it
Between formed virtual light source projected area (being hereafter referred to as the first virtual optical source region) correspondence.
Based on the first embodiment of the liquid crystal module optical homogeneity regulating system of the present invention, the liquid crystal module light of the present invention
Learn in the 3rd embodiment of uniformity regulating system, the acquisition module 10 is further used for：Obtain on the LCDs
The brightness value of each pixel region；
The determining module 20 is further used for：According to the brightness value of each pixel region, each described picture is determined
The second luminance compensation coefficient in plain region；
The adjustment module 30 is further used for：According to the second luminance compensation coefficient, the LCDs is adjusted
The brightness of upper each pixel region.
Fig. 6 is referred to, the circuit signal processing method that the present invention is provided not only can carry out luminance difference to LED/light source
Correction, can also correct to the light source of the plane of incidence of LCDs, by two kinds of antidotes, can be by liquid crystal display
The luminance uniformity of screen brings up to more than 85%.
Each pixel region includes multiple pixels.
The blooming piece is divided into the individual area source areas of (2N+1) × (2M+1), and accordingly, the LCDs can also
It is divided into the individual pixel regions of (2N+1) × (2M+1).
The brightness of each pixel region on the LCDs is Ipixel=Datapixel×IBL, wherein Datapixel
For the driving data of the pixel region, IBLIt is the light intensity value in each the area source area from the blooming piece out.It is described
Luminance difference at blooming piece, makes each I corresponding to pixel region window on the LCDsBLValue is different, because
In the case of this drive signal identical, the I of each pixelpixelDifferent, the image conformity on the LCDs is deteriorated.
This patent is bright to reach compensation optics by the driving data for correcting each pixel region on the LCDs
Degree difference defect, the driving data correction formula of each pixel region is Ipixel=(Kposition×Datapixel)×IBL.Wherein,
KpositionFor the penalty coefficient of the driving data of the pixel region, KpositionIt is according to each pixel on the LCDs
The calculated constant value of actual measurement luminance difference in region.As each described there is a K in pixel regionpositionValue,
Therefore, for the whole LCDs, there is the K that penalty coefficient quantity is (2N+1) × (2M+1)positionArray.
By KpositionThe driving data of each pixel region described in adjusting, can pass through the upper each of adjustable liquid crystal display display screen
The light valve of individual pixel region is realized.
LED intrinsic brightnesses discreteness and the backlight defect such as LED array layout is uneven, can pass through the method for the invention
Compensation is modified, to ensure the brightness uniformity of liquid crystal module.
For the different pixels region on the LCDs, KpositionPreparation method it is incomplete same, for every
Individual pixel region, KpositionPreparation method it is as follows：
1st, from the point of view of actual light optical effect, there is no LED light in the pixel region EDGE AREA of LCDs surrounding
Between brightness superposition problem.In the present embodiment, measuring and calculation is not carried out to the penalty coefficient in this partial pixel region, directly
Meet the K for quoting the adjacent pixel region of the pixel regionposition.Wherein, the adjacent pixel region of the pixel region can be with
It is region corresponding with the LED light source position or region corresponding with virtual light source.
2nd, in addition to the peripheral pixel area at four edge of upper and lower, left and right of LCDs, there remains positioned at screen
The middle individual pixel regions of (2N-1) × (2M-1), the K of the individual pixel regions of (2N-1) × (2M-1)positionValue is to need to survey
Examination calculate obtain, as shown in Fig. 2 the light source partition corresponding to (2N-1) in the middle of screen × (2M-1) pixel region mainly by
First LED light source region and the first virtual light source district's groups into；
3rd, the brightness I of each first LED light source region and the first virtual optical source regionposition, it is by high-precision luminance test
The relevant position brightness of instrument test combined diaphragm is obtained；
4th, the K of each pixel regionpositionThe computing formula of penalty coefficient is：Kposition=Imin/Iposition, wherein
Imin=Min (I1, I2..., I(2N-1)(2M-1)), i.e. IminFor the minimum of the brightness value of each pixel region on the LCDs
Value.
It should be noted that I hereinminFor providing a reference standard for the brightness value of pixel region each described,
By obtaining the brightness value of each pixel region and the difference of the reference standard, you can obtain the driving data of each pixel region
Penalty coefficient.The reference standard is not limited in Imin, in fact, the reference standard could alternatively be I1, I2...,
I(2M-1)(2N-1)In any one, or I1, I2..., I(2M-1)(2N-1)Average, or even arbitrary constant value can also be used.
By the penalty coefficient array of (2N-1) at LCDs center × (2M-1) subregions, correction formula I is applied topixel
=(Kposition×Datapixel)×IBLIn, so that the correction of brightness is realized in the DSP processing modules of LCD drive circuits.
In Fig. 6, module D1 is LED luminance signal processing module, mainly completes the modulation function of LED drive signal.In Fig. 6
D2 is signal transmission module, is that between module D3, signal connects bus shown in module D1 to Fig. 6 shown in Fig. 6.Module D3 shown in Fig. 6
It is the drive module of LED, is the driving drive module of constant current, while the modulation function of electric current and current duty cycle is also supported,
Hold electric current and voltage detecting function etc..D4 modules shown in Fig. 6, are the driving current passages of LED, it is illustrated that for the electricity of a LED
Circulation road, but this patent supports multichannel (many electric currents) LED drive patterns.D5 shown in Fig. 6 is the supply module of LED, is carried
For the Current Voltage needed for backlight LED.This kind of correction mode is primarily suitable for single lamp correction loop of LOCAL-DIMMING.
Figure 15 is referred to, based on the 3rd embodiment of the liquid crystal module optical homogeneity regulating system of the present invention, the present invention
Liquid crystal module optical homogeneity regulating system fourth embodiment in, the acquisition module 10 is further used for：Obtain described
The light source arranging rule of LED light source matrix；
The liquid crystal module optical homogeneity regulating system, also includes：
Second division module 50, for according to the light source arranging rule, the LCDs being carried out pixel partitions,
To obtain the second matrix comprising several pixel regions, each the described pixel region in second matrix is and described
The normal direction light projected area correspondence of the LED/light source of the same position in LED light source matrix, or the LED adjacent with two
The projected area correspondence of the virtual light source formed between light source.
The light source arranging rule refers to the LED light of often capable LED/light source quantity and each column in the LED light source matrix
Source quantity, further, can also include the spacing of two adjacent LEDs light source.According to the arrangement of the LED light source matrix,
The LCDs is divided into into the second matrix including several pixel regions.
The pixel resolution of the LCDs is X × Y, and the LED light source matrix includes N × M LED/light source, often
A virtual optical source point is formed between two LED/light sources, meanwhile, the surrounding of the LCDs is also respectively around a line edge
Region, therefore, the LCDs can be divided into the individual pixel regions of (2N+1) × (2M+1).
The LED of the same position in each the described pixel region in second matrix, with the LED light source matrix
Light source normal direction light projected area (being hereafter referred to as the first LED light source region) correspondence, or the LED/light source adjacent with two it
Between formed virtual light source projected area (being hereafter referred to as the first virtual optical source region) correspondence.
Figure 16 is referred to, the first embodiment based on the liquid crystal module optical homogeneity regulating system of the present invention is real to the 4th
Any one in example is applied, in the 5th embodiment of the liquid crystal module optical homogeneity regulating system of the present invention, the regulation mould
Block 30 includes：
Acquiring unit 31, for obtaining photoelectric conversion factors, initial duty cycle data and the drive of each LED/light source
Streaming current；
Computing unit 32, for the first luminance compensation coefficient and the initial duty cycle according to each LED/light source
Data, are calculated the compensation duty cycle data of each LED/light source；
Adjustment unit 33, for according to the photoelectric conversion factors, the compensation duty cycle data and the driving current,
Adjust the brightness in each area source area on the blooming piece.
The light-intensity difference of LED/light source itself, can directly adjust the LED drive current of LB, realize that optical homogeneity is adjusted
It is whole.
Fig. 9 to Figure 12 is referred to, in the present embodiment, using formula ILED(n,m)=KLED(n,m)×(KLED-DUTY×DUTY)
×CURRENTLED(n,m)To adjust the difference of each LED/light source.Wherein, n and m is respectively in the LED light source matrix
Row data and column data, KLED(n,m)For n rows, the electro-optic conversion coefficient of the LED power of m row (this is a relatively-stationary value,
In the present embodiment, by KLED(n,m)As constant process), (KLED-DUTY× DUTY) be one compensation after duty cycle data,
CURRENTLED(n,m)It is n rows, the driving current of the LED power of m row；The strong penalty coefficient K of LED light in this patentLED-DUTYIt is basis
The strong brightness value of actual measurement LED light in Figure 11 in LED array, calculates according to average algorithm.
KLED(n,m)Can be according to the K in the embodiment of the present invention threepositionMeasuring method is obtained.That is, KLED(n,m)Can
It is calculated with the brightness value by the area source area in the incident side or light emission side on the blooming piece, but, carry out
Iposition' only with the normal direction light corresponding region of the LED/light source, and do not adopt the corresponding region of virtual light source.
KLED(n,m)=Imin’/Iposition', wherein Imin'=Min (I1', I2' ..., I(2N-1)(2M-1)'), i.e. Imin' for institute
State the minimum of a value of the brightness value in each area source area on blooming piece.It should be noted that I hereinmin' for for each institute
The brightness value for stating area source area provides a reference standard, by the brightness value and the reference standard that obtain each area source area
Difference, you can obtain the penalty coefficient in each area source area.The reference standard is not limited in Imin', in fact, the ginseng
Sighting target standard could alternatively be I1', I2' ..., I(2N-1)(2M-1)' in any one, or I1', I2' ..., I(2N-1)(2M-1)'
Average, or even arbitrary constant value can also be used.
If Figure 10 is LCDs brightness correction block diagram.In Figure 10, DD1 modules are the signal processing module of external input,
The preprocessing function of the picture signals such as decoding, the space conversion including picture signal, image quality optimization.DD2 modules in Figure 10, are letter
Number transport module is DD2 modules to the signal transmission bus between DD3, including image data bus, order controlling bus etc..
In Figure 10, DD3 modules are LCDs drive module, mainly complete to drive the pixel that picture signal changes into LCDs
The function of dynamic signal；According to Figure 11, liquid crystal display screen valid pixel is divided into into (2N+1) × (2M+1) subregions, each
The luminance compensation formula of pixel is Ipixel=(Kposition×Datapixel)×IBL,KpositionFor penalty coefficient, DatapixelFor
Driving data, IBLFor each pixel region brightness；The wherein subregion in four border area domain of screen and LED nearby(n,m)Using identical
Compensation coefficient；Backoff algorithm of the present invention realized by the DSP in DD3 modules in Figure 10, makes whole screen show uniformity
More than 85% can be reached.DD4 modules shown in Figure 10 is the drive signal transport module of LCDs, be connection DD3 and
Signal bus module between LCDs, including GATE buses, SOURCE buses etc..This kind of antidote, not only fits
For direct-type backlight, side entrance back is also applied for.
The penalty coefficient that the backlight surface light source of LED luminance penalty coefficient and LCDs is previously mentioned in this patent is in reality
Test in border factory assembling process and obtain.Figure 12 is shop equipment connection figure.(1) LED corrections parameter, is assembled in liquid crystal module
The LED lamp bar stage completes；Every LEDs normal luminous intensity is tested respectively with luminance test instrument, and this data is passed by data communication line 1
Pass producing line computer；Computer is according to the every LEDs monochrome information for obtaining and drives duty cycle information, is obtained by mean compensation algorithm method
Every lamp dutycycle penalty coefficient KLED-DUTY；And by this KLED-DUTYCoefficient is cured to LED luminance signal by programming data wire 1
In the memory of processing module D1, the luminance compensation function of LED lamp bead is realized.(2) the correction parameter of backlight surface light source, is in liquid
Brilliant module assembling closes what the blooming piece stage completed；The brightness of each subregion of blooming piece is tested respectively with luminance test instrument, this
Data pass to producing line computer by data communication line 2；Each the subregion monochrome information of computer according to acquisition, by mean compensation algorithm
Method obtains each partition compensation COEFFICIENT KLED-DUTY；And by this KLED-DUTYCoefficient is cured to liquid crystal display by programming data wire 2
In the memory of screen drive module DD3, LCDs display brightness compensation function is realized.
DSP multiplication function of the present invention using the signal transacting of LCD drive modules, compensates LED light source array brightness disproportionation
Defect, reached lifted liquid crystal module show uniformity purpose；LED light component is realized using the LED drive circuit of LB
Brightness adjustment, to balance the luminance difference of LED component, so as to improve optical homogeneity.
The preferred embodiments of the present invention are these are only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of liquid crystal module optical homogeneity control method, it is characterised in that the liquid crystal module includes the LED in the face of arranging
Light source matrix and blooming piece, and located at the LCDs away from the LED light source matrix side of the blooming piece,
The side away from the LED light source matrix of the blooming piece be light emission side, the liquid crystal module optical homogeneity regulation side
Method comprises the steps：
Obtain the brightness value in each area source area on the blooming piece；
According to the brightness value in each area source area, the first luminance compensation coefficient of each LED/light source is determined；
According to the first luminance compensation coefficient of each LED/light source, each described area source area on the blooming piece is adjusted
Brightness, with the optical homogeneity of the balanced liquid crystal module.
2. liquid crystal module optical homogeneity control method according to claim 1, it is characterised in that the acquisition light
On diaphragm before the brightness value in each area source area, also include：
Obtain the light source arranging rule of the LED light source matrix；
According to the light source arranging rule, the blooming piece is carried out into subregion, to obtain comprising several area source areas
One matrix, the LED of the same position in the area source area of each in first matrix, with the LED light source matrix
The normal direction light projected area correspondence of light source, or the projection of the virtual light source formed between the LED/light source adjacent with two
Region correspondence.
3. liquid crystal module optical homogeneity control method according to claim 1, it is characterised in that the liquid crystal module light
Uniformity tuning method is learned, is also included：
Obtain the brightness value of each pixel region on the LCDs；
According to the brightness value of each pixel region, the second luminance compensation coefficient of each pixel region is determined；
According to the second luminance compensation coefficient, the brightness of each pixel region on the LCDs is adjusted.
4. liquid crystal module optical homogeneity control method according to claim 3, it is characterised in that the acquisition liquid
On crystal display screen before the brightness value of each pixel region, also include：
Obtain the light source arranging rule of the LED light source matrix；
According to the light source arranging rule, the LCDs is carried out into pixel partitions, to obtain comprising several pixel regions
Second matrix in domain, each described pixel region in second matrix, with the same position in the LED light source matrix
LED/light source normal direction light projected area correspondence, or the virtual light source formed between the LED/light source adjacent with two
Projected area correspondence.
5. liquid crystal module optical homogeneity control method as claimed in any of claims 1 to 4, it is characterised in that
The first luminance compensation coefficient according to each LED/light source, adjusts each described area source area on the blooming piece
Brightness, including：
Obtain photoelectric conversion factors, initial duty cycle data and the driving current of each LED/light source；
According to the first luminance compensation coefficient and the initial duty cycle data of each LED/light source, each is calculated
The compensation duty cycle data of the LED/light source；
According to the photoelectric conversion factors, the compensation duty cycle data and the driving current, adjust on the blooming piece
The brightness in each area source area.
6. a kind of liquid crystal module optical homogeneity regulating system, it is characterised in that the liquid crystal module includes the LED in the face of arranging
Light source matrix and blooming piece, and located at the LCDs away from the LED light source matrix side of the blooming piece,
The side away from the LED light source matrix of the blooming piece is light emission side, the liquid crystal module optical homogeneity regulation system
System includes：
Acquisition module, for obtaining the brightness value in each area source area on the blooming piece；
Determining module, for the brightness value according to each area source area, determines that the first brightness of each LED/light source is mended
Repay coefficient；
Adjustment module, for the first luminance compensation coefficient according to each LED/light source, adjusts each on the blooming piece
The brightness in the area source area, with the optical homogeneity of the balanced liquid crystal module.
7. liquid crystal module optical homogeneity regulating system according to claim 6, it is characterised in that the acquisition module,
It is further used for：
Obtain the light source arranging rule of the LED light source matrix；
The liquid crystal module optical homogeneity regulating system, also includes：
First division module, for according to the light source arranging rule, the blooming piece being carried out subregion, if to be included
First matrix in Gan Ge area sources area, the area source area of each in first matrix, in the LED light source matrix
Same position LED/light source normal direction light projected area correspondence, or formed between the LED/light source adjacent with two
The projected area correspondence of virtual light source.
8. liquid crystal module optical homogeneity regulating system according to claim 6, it is characterised in that the acquisition module enters
One step is used for：Obtain the brightness value of each pixel region on the LCDs；
The determining module is further used for：According to the brightness value of each pixel region, each described pixel region is determined
The second luminance compensation coefficient；
The adjustment module is further used for：According to the second luminance compensation coefficient, each on the LCDs is adjusted
The brightness of the pixel region.
9. liquid crystal module optical homogeneity regulating system according to claim 8, it is characterised in that the acquisition module enters
One step is used for：Obtain the light source arranging rule of the LED light source matrix；
The liquid crystal module optical homogeneity regulating system, also includes：
Second division module, for according to the light source arranging rule, the LCDs being carried out pixel partitions, to obtain
The second matrix comprising several pixel regions, each described pixel region in second matrix, with the LED/light source
The normal direction light projected area correspondence of the LED/light source of the same position in matrix, or between the LED/light source adjacent with two
The projected area correspondence of the virtual light source of formation.
10. the liquid crystal module optical homogeneity regulating system according to any one in claim 6 to 9, it is characterised in that
The adjustment module includes：
Acquiring unit, for obtaining photoelectric conversion factors, initial duty cycle data and the driving electricity of each LED/light source
Stream；
Computing unit, for the first luminance compensation coefficient and the initial duty cycle data according to each LED/light source, meter
Calculation obtains the compensation duty cycle data of each LED/light source；
Adjustment unit, for according to the photoelectric conversion factors, the compensation duty cycle data and the driving current, adjusting institute
State the brightness in each area source area on blooming piece.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN107295271B (en) * | 2017-08-22 | 2020-05-29 | 信利光电股份有限公司 | Illumination compensation method and system of spherical light source |
| CN108490610A (en) * | 2018-03-22 | 2018-09-04 | 京东方科技集团股份有限公司 | Improve the method and back lighting device of HUD brightness homogeneities |
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| CN115494573A (en) * | 2022-01-27 | 2022-12-20 | 珠海莫界科技有限公司 | High color uniformity diffractive optical waveguide and display device |
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