CN104851397B - Drive the method for light source module and the display device using this method - Google Patents
Drive the method for light source module and the display device using this method Download PDFInfo
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- CN104851397B CN104851397B CN201410558910.1A CN201410558910A CN104851397B CN 104851397 B CN104851397 B CN 104851397B CN 201410558910 A CN201410558910 A CN 201410558910A CN 104851397 B CN104851397 B CN 104851397B
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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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
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
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Abstract
The invention discloses the method for driving light source module and using the display device of this method, which includes: light source module, including multiple light-emitting blocks；Display panel including multiple pixels and is divided into multiple images block corresponding to the light-emitting block；Light source module control unit, picture signal is divided into image block, generate the color dim signal of the first image block corresponded in image block, the pixel distortion value and pixel improved values for corresponding to each pixel of the first image block are obtained by the first image block of analysis, determine whether to carry out color light modulation on the first light-emitting block for corresponding to the first image block based on pixel distortion value and pixel improved values, and the first light-emitting block is driven based on definitive result.
Description
Cross reference to related applications
This application claims the South Korea patent application 10-2014- submitted on 2 18th, 2014 to Korean Intellectual Property Office
No. 0018644 priority, during disclosure of this application is incorporated by reference in its entirety.
Technical field
The present invention relates to the method for driving light source module and use the display device of this method.
Background technique
Such as liquid crystal display (LCD), plasma display panel (PDP) and organic light emitting diode display (OLED) are put down
Face or nonplanar flat displays (FOOT-PD) are quickly developed to replace cathode-ray tube (CRT).For FOOT-PD,
It cannot initiate the image light of their sendings on one's own account as exemplary LCD type and the comparison of PDP type.Therefore, outside the needs such as LCD
Portion's light source.Here, light source can be the dot format light source or such as electroluminescent lamp of such as matrix of light emitting diode (LED)
(EL) or the linear format light source of cold-cathode fluorescence lamp (CCFL).Particularly, LED is widely used as to LCD panel
The selected light source of backlight (carrying out self-corresponding back light unit) is provided.LED based back light unit may be constructed such that only entire
Uniform white light is provided in display area (DA), or alternatively selectivity is provided and can be controlled respectively based on coloured point source one by one
The colored light source point of system.
In recent years, being obviously increased to the concern of so-called selective light regulating technology to improve to use uses LED as point light
The contrast of the product of the back light unit in source and/or reduce its power consumption.In one kind of these dimming modes, entire screen
Display area (DA) is divided into more block of pixels of multiple identical sizes, and total (example of each relevant block is controlled by " brightness light modulation "
Such as, or standardization is average) brightness, brightness, which is dimmed, to be performed to correct the brightness of such as gamma curve distortion and ask based on block one by one
Topic, gamma curve distortion for example may be by leaking somehow by the uncontrolled light of display panel (for example, by not by liquid
Sew out in the region of crystalline substance control) it is caused.Therefore, by using this " brightness light modulation ", the comparison of display device can be improved
Degree, while can advantageously reduce the power consumption of display device.
In recent years, begun one's study combination brightness and color dimming mode, wherein carried on the back in addition to being based solely on brightness
Other than light light modulation, backlight dimming is also executed based on color one by one.More specifically, researching and developing using such as red, green and indigo plant
The primary colours point source of color LED carries out the technology of light modulation driving as light source and according to color and brightness.It is this based on color
Light modulation actuation techniques can be used for reducing cross-color, for example, such as the cross-color based on determined by individual element.However, ought be only
When carrying out this determining based on individual element, cross-color can occur one by one piece, wherein each piece comprising it is potential not
With multiple pixels of color.Therefore, in color display characteristic, there is also improved spaces.
It should be appreciated that the background technology part is intended to provide the useful background for understanding presently disclosed technology, and
In this way, background technology part may include before the corresponding invention date of subject matter disclosed herein, it is not those related fieldss
The thought, concept or approval of a part that technical staff understands or understands.
Summary of the invention
The disclosure, which provides the selectively driving that can improve color reproducibility and reduce cross-color, to be had
The method of coloured light source module and the automatic display device for using this method.
However, this introduction is not limited to illustrative embodiments described in this paper.It is retouched in detail by referring to given below
It states, the ordinary skill people of the above and other aspects of present disclosure for technical field belonging to the disclosure
Member will become apparent.
According to the one side of present disclosure, a kind of method for driving light source module is provided, light source module provides light to tool
There is the display panel of multiple pixels and including multiple light-emitting blocks, wherein the offer of light provides light as unit of light-emitting block.The party
Method includes: that picture signal is divided into multiple images block corresponding to multiple light-emitting blocks by analysis picture signal, and generation corresponds to
The color dim signal (color dimming signal) of the first image block in multiple images block planned, passes through analysis
First image block obtains the pixel distortion value and pixel improved values for corresponding to each pixel, it is determined whether based on pixel distortion value and
Pixel improved values carry out planned color light modulation on the first light-emitting block for corresponding to the first image block, and are tied based on determining
Fruit drives the first light-emitting block.
The one side of disclosure according to the present invention provides a kind of display device.Display device includes: light source die
Block, including multiple light-emitting blocks；Display panel including multiple pixels and is divided into multiple images corresponding to multiple light-emitting blocks
Block；Picture signal is divided into image block, generates being counted for the first image block corresponded in image block by light source module control unit
The color dim signal drawn, all pixels by analyzing the first image block obtain the pixel distortion value and pixel of the first image block
Improved values, it is determined whether based on pixel distortion value and based on pixel improved values on the first light-emitting block for corresponding to the first image block
Color light modulation is carried out, and the first light-emitting block is driven based on definitive result.
Detailed description of the invention
The illustrative embodiments of detailed description of the present invention disclosure by referring to accompanying drawing, the disclosure
Above and other aspects and feature will become apparent, in the accompanying drawings:
Fig. 1 is the schematic block diagram of display device, and display device is configured to provide by color tune according to present disclosure
The block-by-block of cross-color caused by light compensates；
Fig. 2 is can such as to show after the decomposition of display panel used in the display device of Fig. 1 and respective sources module
Meaning property plan view；
Fig. 3 is the machine realization side for schematically showing automatic driving light source module according to the embodiment of the present disclosure
The flow chart of method；
Fig. 4 is the flow chart for schematically showing the embodiment including the operation S30 in the driving method of Fig. 3；
Fig. 5 is the flow chart for schematically showing the embodiment including the operation S50 in the driving method of Fig. 3；
Fig. 6 is the flow chart for schematically showing the embodiment including the operation S70 in the driving method of Fig. 3；And
Fig. 7 to Figure 16 is the diagram for being used to help the driving method of explanatory diagram 3.
Specific embodiment
By referring to accompanying drawing with the detailed description of illustrative embodiments below, present disclosure and realize the disclosure in
The advantages of method of appearance and feature can be understood more readily by.However, this introduction can with many different forms embodiment and
It is not understood as limited to the illustrative embodiments stated herein.On the contrary, providing these illustrative embodiments makes this public affairs
It opens that content is comprehensively and complete, and sufficiently conveys the concept of the disclosure to those of skill in the art.It is identical
Reference numerals refer to identical element.In the accompanying drawings, for clarity, the size of layer and region and relative size may
It is exaggerated.
It should be understood that when element or layer be referred at another element or layer " upper (on) ", it can be located immediately at
On another element or layer, or there may be the element of intervention or layers.
For ease of description, can be used herein such as " lower section ", " ... under ", " lower part ", " top ",
The space correlations term such as " top " describes an element or feature as shown in figures and another (other) element
Or the relationship of feature.It should be understood that in addition to the orientation described in the attached drawing, spatially relative term be intended to include use or
The different direction of device in person's operation.Through this specification, identical reference label refers to identical element.
The plan view of the schematic representation of reference idealization embodiment and sectional view are described herein according to the present invention
The embodiment of disclosure.Thus, for example, it is contemplated that by the shape distortion for the diagram that manufacturing technology and/or tolerance generate.Cause
This, embodiment presented herein should not be construed as limited by the introduction of the concrete shape to region shown in this article.Such as by
Shape caused by manufacturing practice all deviates within the expection of present disclosure.Therefore, region shown in figure is practical
On be schematic diagram and their shape is not intended to the true form for showing the region of device and is not intended to be limited to this introduction
Range.
Although it should be understood that term first, second, third, etc. can be used to describe various elements herein,
But these elements should not be limited by these terms.These terms are only used to distinguish an element with another element.Therefore,
Without deviating from the teachings, first element discussed below can be referred to as second element.
Term used in the present invention is only used for description specific embodiment and is not intended to limit.As herein
It is used, unless the context clearly indicates otherwise, otherwise, singular " one (a) ", " one (an) " and " this
(the) " it is intended to include plural form, including "at least one", except non-content is clearly otherwise indicated."or" mean " and/
Or ".As used herein, term "and/or" includes any and all combination that item is listed in one or more kinds of associations.It should be into
One step understand, when in the present specification use term " including (comprises) " and/or " including (comprising) ",
Or when " including (includes) " and/or " including (including) ", indicate the characteristic, region, integer, step, behaviour
Make, the presence of element, and/or component, but one or more kinds of other characteristics, region, integer, step, operation, member are not precluded
The presence or addition of part, component, and/or a combination thereof.
The suffix " module " for element and " unit " used in the following description is only by considering present disclosure
The summary of writing provide and be perhaps used in conjunction with but they do not have meaning or effect distinguishable from one another.
Unless otherwise defined, all terms (including technology and scientific and technical terminology) used in the present invention all have
The normally understood same meaning of one of present disclosure one skilled in the art.It is to be further understood that such as
Term defined in universaling dictionary should be interpreted as having consistent to be contained with the meaning in related fields context and the present invention
Justice, and be not able to idealize or excessively form explains, except the clear so regulation of non-present invention.
Hereinafter, the embodiment of disclosure according to the present invention will be described with reference to the drawings.
Fig. 1 is the schematic block diagram according to the display device 10 of the embodiment for the introduction that present disclosure may be implemented.
Fig. 2 is exemplary display panel 100 (for example, having a face of 16 × 16 arrays for the pixel P for being designated as data block DB
Plate) and corresponding light source module 200 (for example, have be designated as corresponding light source block B LED RGB shine triple 8 × 8
One module of array) floor map, wherein the data block DB and corresponding light source block B shown can be indicated such as in Fig. 1
Shown in panel 100 and light source module 200 the part holding display area (DA).
With reference to Fig. 1, the display device 10 according to current embodiment may include display panel 100, timing control unit
110, panel driving unit 130 and light supply apparatus (back light unit or BLU).
Display panel 100 is configured to display and corresponds to the figure indicated from the image of the received digital signal ID of external source
Picture.Display panel 100 may include the multiple pixel P for being configured as showing the image as color image.Each pixel P can be with
Including red sub-pixel SPr (also referred to as unit pixel PR), green sub-pixels SPg (also referred to as unit pixel PG) and indigo plant
Sub-pixels SPb (also referred to as unit pixel PB).Although being not shown in the accompanying drawings, in one embodiment, each pixel P
It may further include white sub-pixels SPw (also referred to as unit pixel PW).Although being not shown in the accompanying drawings, each pixel P
It may include at least one switch element TR and the company for being connected to the respective gates line GL to intersect with each other and corresponding data line DL
It is connected to the liquid crystal capacitor CLC and storage CST of switch element TR.As will be described in further detail hereinafter, display panel
100 image, which forms pixel, can be divided into so-called display panel spacing block or simpler image displaying block DB, so that aobvious
The image shown is divided into the image block (also referred to as DB or being optionally iDB) of multiple identical sizes.
Timing control unit 110 receives control signal Cont and picture signal ID from external device (ED) (not shown).Control letter
Number Cont may include vertical synchronizing signal, horizontal synchronizing signal, clock signal and data enable signal etc..Believed by using control
Number Cont, timing control unit 110 can produce the timing controling signal of the driving timing for control panel driving unit 130
T_Cont.Timing controling signal T_Cont may include the first control for controlling the driving timing of data line drive unit 132
The second control signal T_Cont2 of signal T_Cont1 processed and the driving timing for controlling grid line driving unit 134.Periodically
Control unit 110 can be exported according to scheduled interface specification to be had from the data format after the change of format of input image data ID
Image data ID'.Then, the data line drive unit 132 of panel driving unit 130 will correspond to the picture signal through changing
The analog drive signal of ID' is exported to the data line DL of panel 100.In addition, timing control unit 110 can believe the first control
Number T_Cont1 is exported to data line drive unit 132 and is exported second control signal T_Cont2 to grid line driving unit
134.In the exemplary embodiment, first control signal T_Cont1 can include but is not limited to output initial signal, horizontal
Beginning signal, clock signal etc..Second control signal T_Cont2 can include but is not limited to vertical start signal, gate clock letter
Number, output enable signal.
Panel driving unit 130 can be used from the received picture signal ID' through changing of timing control unit 110 and determine
When control signal T_Cont and drive display panel 100.Panel driving unit 130 may include 132 He of data line drive unit
Grid line driving unit 134.
Grid line driving unit 134 can receive the gate-on voltage of predeterminated level and the grid cut-off electricity of predeterminated level
It presses and can refer to according to sequentially exporting to all have from the received second control signal T_Cont2 of timing control unit 110
The grid line driving signal of gate-on voltage existing for fixing time.Grid signal can be transmitted sequentially continuously to motivate
One of gate lines G L of display panel 100 is to sequentially scan grid line GL.Although being not shown in the accompanying drawings, display device 10
May further include convert input voltage into gate-on voltage and grid cut-off voltage and by gate-on voltage and
Grid cut-off voltage is exported to the power governor of grid line driving unit 134.
Data line drive unit 132 can be operated by analog drive voltage and be can be used from gamma electric voltage generation unit
The received gamma electric voltage of (not shown) generates multiple gray scale voltages.In response to being controlled from timing control unit 110 received first
Signal T_Cont1, data line drive unit 132 can select to correspond to the picture signal through changing from the grayscale voltage of generation
The grayscale voltage of ID' and the data line that display panel 100 can be applied to using selected grayscale voltage as data-signal
Corresponding one of DL.
When grid signal is sequentially transmitted to gate lines G L, data-signal and grid signal are synchronously transferred to number
According to line DL.When grid signal is transferred to selected grid line, the thin film transistor (TFT) TR of selected grid line is connected in response to grid
Pole signal is switched on and (conductibility is presented).The data line of the thin film transistor (TFT) TR of conducting is connected to when data-signal is transferred to
When, the liquid crystal capacitor CLC and storage capacitance of each pixel or sub-pixel are injected by conducting membrane transistor TR
Device CST.Liquid crystal capacitor CLC adjusts the light transmittance of liquid crystal according to the voltage wherein filled.When thin film transistor (TFT) TR conducting, deposit
Storage container CST gathers data-signal.When thin film transistor (TFT) TR cut-off, storage CST keeps its charge and transmits
Corresponding data-signal is to liquid crystal capacitor CLC, so that liquid crystal capacitor CLC be kept to be electrically charged and its liquid crystal molecule such as data
It is positioned as signal is indicated.In this way, display panel 100 when light stimulus from back light unit BLU when by forming
It is projected to the image of user.
The light supply apparatus BLU shown includes light source module 200 and light source module control unit 300.
Light source module 200 can be set to (for example, below) adjacent with display panel 100 to provide light to display
Panel 100.Light source module 200, which can be divided into, all has the multiple of separately controllable colored light emitters (for example, colored led)
Light-emitting block B.More specifically, light source module 200 is divided into M × N number of light-emitting block B, wherein M and N is natural number.Meanwhile it is aobvious
Show that the display area (DA) of panel 100 can equally be divided by the M based on a corresponding light-emitting block B × N number of
Displaying block DB.The each right of displaying block DB and corresponding light-emitting block B can be controlled one by one piece.More specifically, according to brightness tune
Light-emitting block B can be operated alone in one or two of light method and color light-dimming method.Brightness light modulation refers to each light-emitting block B
Whole spectral luminance factors the case where becoming the post analysis dimmed state through changing from the not dimmed state of original plan.Color light modulation
Refer to visible spectrum becomes their own brightness from the not dim particular color gray scale states of original plan
For the post analysis through changing particular color dimmed state the case where.For example, when display device is due to its limited colour gamut capacity
(gamut capability), which cannot be generated, to be initially required in the specific color defining point in 3D hue coordinate space (u, v and Y)
When brightness (for example, display device cannot generate desired color and/or its in u-v plane cannot generate desired intensity Y),
It can be using light modulation.
Fig. 2 is the schematic plan view of the simple version of light source module 200 and display panel 100 shown in Fig. 1.Fig. 2
It is considered the part for corresponding to an image block DB of display panel 100 and corresponding one of light source module 200 shines
The amplification view of block B.
With reference to Fig. 1 and Fig. 2, each light-emitting block B of light source module 200 may include multiple unit light-emitting blocks 210, Mei Gedan
Position light-emitting block 210 may include multiple primary color emission devices, and such as, first light source 211, the transmitting for emitting the light of the first color are different
The second color light the third color different with transmitting of second light source 213 light third light source 215.That is, light source module
200 each light-emitting block B may include multiple first light sources 211, multiple second light sources 213 and multiple third light sources 215.Example
Such as, the first color can be any of green, blue and red, and the second color can be in green, blue and red
Different from another of the first color, and third color can be in green, blue and red be different from the first color and
Second color another.For ease of description, hereinafter the first color is defined as red, and the second color is defined as green
Color and third color are defined as blue.However, this is only example, first to third color can change.In addition, each unit
Light-emitting block 210 may include the 4th different color (not shown) of white or yellow etc..
First light source 211 can be semiconductor light-emitting-diode (LED).In the exemplary embodiment, first light source 211
It can be the red LED for issuing the light (that is, red light) of the first color.Similarly, second light source 213 is also possible to LED.Showing
In example property embodiment, second light source 213 can be the green LED for issuing the light (that is, green light) of the second color.In addition, the
Three light sources 215 are also possible to LED.In the exemplary embodiment, third light source 215 can be issue third color light (that is,
Blue light) blue led.The red light issued from first light source 211 can have (but being not limited to) about 580nm to 700nm
Wavelength, the green light issued from second light source 213 can have the wavelength of (but being not limited to) about 460nm to 630nm, and
The blue light issued from third light source 215 can have the wavelength of (but being not limited to) about 400nm to 500nm.Optionally, light source
The different luminescence technologies of such as OLED technology can be used.
It can be with one or more pixel P of display panel 100 including the unit light-emitting block 210 in each light-emitting block B
It is corresponding.In the accompanying drawings, a unit light-emitting block 210 corresponds to four pixel P (this pixel for corresponding to 2 × 2 arrays),
In, each pixel has corresponding red sub-pixel (SPr), corresponding blue subpixels (SPb) and the corresponding sub- picture of green
Plain (SPg).However, this is only example, unit shine (ULE) block 210 can also respectively with the personalized pixel pair in pixel P
It answers.That is, the correspondence ratio of a unit light-emitting block 210 and corresponding one or more pixel P be not limited to specific ratio (for example,
210 4 pixels of each ULE block).
Including multiple first light sources 211, multiple second light sources 213 and the multiple third light sources 215 in a light-emitting block B
It can be independently of including that other light sources in light-emitting block B are driven.In addition, including multiple in identical light-emitting block B
One light source 211, multiple second light sources 213 and multiple third light sources 215 can each other irrelevantly and respectively according to its own
Color is driven.In addition, including first light source 211, second light source 213 and third light source in a unit light-emitting block 210
215 can be driven independent of one another and irrelevantly.
Although being not shown in the accompanying drawings, light source module 200 may further include multiple first light sources 211, multiple second
Light source 213 and multiple third light sources 215 are assemblied in circuit board above.For transmitting driving current to first light source 211, second
The circuit layout of light source 213 and third light source 215 can be formed on circuit boards.Circuit board can be by printed circuit board (PCB)
It is made, but its is without being limited thereto.In order to improve radiating efficiency, circuit board can also be made by metal-core printed circuit board (MCPCB)
At, but its is without being limited thereto.
It returns referring again to Fig. 1, light source module control unit 300 is configured as each light-emitting block B of control light source module 200
Respective drive.
Light source module control unit 300 may include image analyzing unit 310, hue coordinate computing unit 330, operation list
Member 350, pattern determining unit 370 and light source module driving unit 390.Although not shown, it should be appreciated that light source module control
Unit 300 processed, which may include that the one or more of one or more data processors and store instruction and operation data is corresponding, to be deposited
Module is stored up, for automatically carrying out the function of described unit 310,330,350,370 and 390.
Original image signal ID (or picture signal ID' through changing) can be divided into each by image analyzing unit 310
Corresponding to display panel spacing block DB with the corresponding one expression multiple images block of their correspondence light-emitting block B to induction signal
iDB's.Image analyzing unit 310 can be to be generated each for controlling by analyzing corresponding image block signal iDB ' s generation
One or more color dim signals of intensity locating for color in image block DB.For example, image analyzing unit 310 can divide
Analysis is selected from the image block (hereinafter, referred to as ' the first image block ') of multiple images block DB, determines the first figure based on analysis result
As the representative color of block (for example, MAXr, MAXg, MAXb, and is also optionally MAXw, or be optionally in displaying block DB
Color to be shown in most popular color), and use is generated based on determining representative color (for example, the most prevalent color class)
In driving corresponding light-emitting block corresponding to the first image block (hereinafter, referred to as ' the first light-emitting block ' or the image analyzed
Block) correspondence primary color emission device (for example, 211,213 and 215) corresponding color dim signal.Hereinafter will description about using
Image analyzing unit 310 generates the more details of the operation of color dim signal.
Image analyzing unit 310 can also determine the first image block representative luminance value (for example, it is unrelated with color etc. most
Normal duplicate gray value) and the brightness dim signal for driving the first light-emitting block is generated based on representative luminance value.
Hue coordinate computing unit 330 can calculate the hue coordinate of each of each image block DB pixel ' use '
To determine their positions (for example, to define used colour gamut part figure) in scheduled hue coordinate space.For example,
Hue coordinate computing unit 330 can obtain pixel data by analyzing the first image block pixel by pixel and based on face
Tone optical signal carries out the hue coordinate (or color light modulation hue coordinate) that each pixel is calculated in the case where color light modulation
With the hue coordinate (or non-dimmable hue coordinate) for calculating each pixel in the case where no progress color light modulation.This
In, color light modulation hue coordinate (for example, colour gamut when carrying out color light modulation) and non-dimmable hue coordinate be not (for example, when having
Colour gamut when carrying out color light modulation) it can be the hue coordinate in the pre-color coordinate system of such as 1931CIE system.
Operating unit 350 can produce the data for each pixel.More specifically, each for displaying block DB
Pixel, operating unit 350 can calculate the analysis number of multiple pixel distortion values and multiple pixel improved values as displaying block DB
According to.Operating unit 350 can be sat based on the color light modulation color by each the calculated pixel of hue coordinate computing unit 330
Mark and non-dimmable hue coordinate calculate the data of each pixel, and determine each calculated pixel data whether
Corresponding to pixel distortion value or pixel improved values.Here, improving can be related to perceiving face as what human visual system perceived
The improvement of color contrast.
Pattern determining unit 370 can determine whether to carry out color light modulation on each light-emitting block B based on analysis result.?
In example, pattern determining unit 370 can receive the pixel distortion value of the first image block and pixel from operating unit 350 to be improved
Value, and automatically determine whether to carry out face on the first light-emitting block for corresponding to the first image block based on these received signals
Tone light.
For example, determining whether that, when carrying out color light modulation on the first light-emitting block (DB1), pattern determining unit 370 can be with
The color dim signal generated by image analyzing unit 310 is provided to light source module driving unit 390.In addition, if image point
Analysis unit 310 also generates brightness dim signal, and pattern determining unit 370 can be by brightness dim signal and color dim signal one
It rises and is supplied to light source module driving unit 390.
When determining the progress color light modulation not on the first light-emitting block, pattern determining unit 370 can not be to light source module
Driving unit 390 provides the color dim signal generated by image analyzing unit 310.In addition, if image analyzing unit 310 is gone back
Brightness dim signal is generated, pattern determining unit 370 can only provide brightness dim signal to light source module driving unit 390.
One result reduces power consumption while can be the excessive distortion of the contrast between the color for avoiding display.
Light source module driving unit 390 can drive the light-emitting block B of light source module 200.Light source module driving unit 390 can
With one kind or two based on the color dim signal and brightness dim signal that are provided according to the definitive result of pattern determining unit 370
Plant the light-emitting block B or light source 211,213 and 215 to drive light source module 200.
Fig. 3 is the method for the driving light source module for the embodiment for schematically showing disclosure according to the present invention
Flow chart.More specifically, Fig. 3 is the flow chart for schematically showing the operation of light supply apparatus BLU of Fig. 1.Fig. 4 is schematically
The flow chart of embodiment including the operation S30 in the driving method of Fig. 3 is shown.Fig. 5 is to schematically show to be included in
The flow chart of the embodiment of operation S50 in the driving method of Fig. 3.Fig. 6 is schematically shown including in the driving side of Fig. 3
The flow chart of the embodiment of operation S70 in method.Fig. 7 to Figure 14 corresponds to the display device 10 of Fig. 1 and is provided use
In the diagram of the driving method of explanation figure 3.Particularly, Figure 10 is the enlarged drawing of the first image block DB1 shown in Fig. 9, wherein
Fig. 9 has blue image region IB, white image region IW, green image region IG and yellow image region IY.
With reference to Fig. 3, the method according to the driving light source module of current embodiment may include by analyzing picture signal
Picture signal is divided into multiple images block (operation S10), generates the color tune of the first image block corresponded in multiple images block
Optical signal (operation S30), the pixel distortion for corresponding to each pixel of the first image block is obtained by the first image block of analysis
Value and pixel improved values (operation S50) are based on the pixel distortion value and the determination of pixel improved values determined for the first image block
It is no to be carried out on the first light-emitting block for corresponding to the first image block color light modulation (or color light modulation driving) (operation S70), and
And the first light-emitting block (operation S90) is driven based on definitive result.
Picture signal, which is divided into image block (operation S10), by analysis picture signal to carry out as follows.
Referring to figs. 1 to Fig. 3, Fig. 7 and Fig. 8, when inputting picture signal as shown in Figure 7, image analyzing unit 310 is connect
The picture signal of input is divided into the image blocks of multiple identical sizes as shown in Figure 8 by the picture signal of analysis input
DB.For ease of description, it is assumed that picture signal includes four with the corresponding difference primary color as shown in Fig. 7 and Fig. 8
A region.More specifically, the image (Fig. 7) of input has main blue region IB (for example, the picture with any other color class
Element is compared to the background sky with more blue colored pixels), main white area IW (for example, cloud in background sky),
Main green area IG (for example, region comprising plant) and main yellow area IY (for example, containing husky prospect).
The generation (operation S30) of color dim signal corresponding to the first image block in image block can carry out as follows.
Referring to figs. 1 to Fig. 4, Fig. 9 and Figure 10, in the exemplary embodiment, operation S30 may include extracting to correspond to
From the colouring information (the operation S31 in the flow chart of Fig. 4) of each pixel of the first image block, to the block for corresponding to analysis
The color class of the colouring information of each pixel of (for example, DB1) is classified (operation S32), maps each color class to pre-
Fixed color coordinate system (operation S33), determines the representative color of the first image block (for example, which color class, which has, belongs to this
Most pixel numbers of color class --- operation S34), and (the operation of color dim signal is generated based on determining representative color
S35)。
More specifically, light supply apparatus BLU or display device 10 can store preset color class form data, color class
Form data can store in storage unit or image analyzing unit 310.Color class form data may include be multiple
Each of different color class carrys out characteristic of division information.For example, driving to the red of corresponding bright, green and blue it is coloured
Each of point can be corresponding to the discrete colors gray level (for example, 256 color gray scales of each color class) of predetermined quantity
One is associated, wherein as human visual system is appreciable be difficult to be distinguished from each other out in the group it is adjacent and essentially identical
The group of color gray level can be defined as corresponding color gray scale class.In the exemplary embodiment, red, green with reference to Fig. 9
Each of color and Blue class are divided into each 256 color gray levels, and 256 in each color class
Color gray level can be divided into four color gray level classes according to visibility.That is, red, green and blue 256 colors
Gray level is divided into four color gray level classes, that is, and be sheerly used as simple example, Class_X1 covering 0 to
The gray level of 63 head and the tail, Class_X2 covering 64 to 127 mid-gray gray levels, Class_X3 covering 128 to 191 gray level and
The gray level of Class_X4 covering 192 to 255, wherein X can be one in R, G and B.It therefore, can be in current embodiment party
There are 256 × 256 × 256 gray levels (all transformation for color R, G, B) and in total 4 × 4 × 4 face in total in formula
Color shade grade class (all transformation for class R, G, B).In the present embodiment, red, green and blue spectral region
Each is divided into four corresponding specific color gray level classes, more specifically, class R1 to class R4, class G1 be to class G4, or
Class B1 to class B4.However, this is only example.That is, since each specific color gray level class is defined as such as human vision
The number in the region of the appreciable similar or identical visibility of system, the specific color gray level class of each color can basis
The attribute of display device and change.In addition, each color can have equal or different number of specific color gray level
The size of class, each specific color gray level class can change according to the number of color gray level.In addition, about these colors
The information of class, that is, color class form data can be stored in advance in storage unit or image analyzing unit 310.
Image analyzing unit 310 can obtain in the first image block DB1 of graph block DB from any or other modes
The colouring information of the pixel data Px of each pixel P corresponding to display panel 100, and can be by comparing obtained
Colouring information identifies the specific color gray level class of each pixel data Px with above-mentioned color class form data.Here, as
Prime number may include red, green and blue color the gray-scale information of each (although optional according to the colouring information of Px
It can be other colors or other color in embodiment).Then, image analyzing unit 310 can be by the tool of classification
Body color gray level class maps to the color coordinate system for being divided into multiple color regions.In the exemplary embodiment, color
Coordinate system can be 1931 color coordinate system of CIE 1976 or CIE.In addition, in the exemplary embodiment, color is sat
Each color region of mark system can be defined as including having the face such as the appreciable similar visibility of human visual system
The region of color shade grade.Color region can be set in the table to form color coordinate system form data.With color class
Form data is identical, and color coordinate system form data can be pre-stored in storage unit or image analyzing unit 310
In.Alternatively, image analyzing unit 310 can obtain the colouring information of pixel data Px and directly map colouring information
To the color region of color coordinate system, without using color class assorting process.
Image analyzing unit 310 can determine the color region in color coordinate system, wherein determining color region is
Region with a part of the maximum number of value as color coordinate system in the color class for mapping to the color region,
In, in coordinate system there is the color region for mapping to the maximum number of value therein from the image block analyzed to be considered
It is the first image block DB1 " representing color ".Alternatively, image analyzing unit 310 can analyzed by that will have
The specific color gray level class of one of existing the maximum number of value maps to color coordinate system in image block (for example, DB1)
To determine the representative color of the first image block DB1.If not carrying out color class assorting process, image analyzing unit 310 can be with
Determine the representative color that the color region that the maximum number of value is mapped in color coordinate system is the first image block DB1.For example,
In the first image block DB1, the quantity of the pixel P corresponding to blue region IB or the pixel data corresponding to blue region IB
The quantity of Px is greater than the quantity of the pixel P corresponding to white area IW or the number of the pixel data Px corresponding to white area IW
Amount.Therefore, though the exemplary first image block DB1 of Fig. 9 and Figure 10 further include in its boundary white features (IW, for example,
White clouds), the representative color of the first image block DB1 can be determined that blue.
Image analyzing unit 310 can generate color dim signal based on determining representative color.
However, above description is only example, and image analyzing unit 310 can also generate correspondence in other various methods
In the color dim signal of the first image block DB1.The one side of the disclosure is each image for being analyzed
It is (or more that the specific color dim signal (either multiple color dim signals) of block (for example, DB1) is different from brightness dim signal
A brightness dim signal), wherein brightness dim signal is/is not specific color, and specific color dim signal is specific face
Color.Therefore it provides the control of the more minute differences of backlight dimming function, wherein the image block (for example, DB1) analyzed
Specific color attribute together with the image block (for example, DB1) analyzed more common brightness attribute be considered.Pass through consideration
Specific color attribute can produce the image with smaller cross-color and/or can consume less power.
In some embodiments, image analyzing unit 310 not only can produce corresponding color dimming information, Er Qieke
To generate the corresponding bright dimming information of each image block (for example, DB1).For example, image analyzing unit 310 can extract first
The representative luminance value of image block DB1 and representative luminance value based on extraction generates brightness dim signal.
Data by analyzing each image block obtain the picture of each pixel corresponding to each image block (for example, DB1)
Plain distortion value and pixel improved values (operation S50) can carry out as follows.
Referring to figs. 1 to Fig. 5 and Figure 10 to Figure 12, in the exemplary embodiment, operation S50 may include: to pass through analysis
The hue coordinate and coordinates computed that will carry out color light modulation of each pixel coordinates computed system of corresponding first image block
The hue coordinate (because they do not carry out color light modulation) (operation S51) as non-dimmable hue coordinate of system, determines non-
Whether light modulation hue coordinate is located in the color region including preset reference coordinate (operation S52), if it is determined that non-dimmable color
Coordinate is located in the color region including preset reference coordinate, calculates between color light modulation hue coordinate and non-dimmable hue coordinate
Coordinate system in the first separating distance (operation S53), and determine whether calculated first distance is pixel " distortion "
Value (operation S57).If determining that non-dimmable hue coordinate is not at the color area including preset reference coordinate in operation 52
In domain, then first distance, reference coordinate and the color light modulation between color light modulation hue coordinate and non-dimmable hue coordinate are calculated
Third distance (operation S54) between second distance and reference coordinate between hue coordinate and non-dimmable hue coordinate.So
Afterwards, determine whether calculated second distance is equal to or more than the calculated third distance in operation S54 in operation S54
(operation S55).If determining that second distance is equal to or more than third distance in operation S55, first distance is confirmed as picture
Plain " improvement " value (operation S56).If determining that second distance is less than third distance in operation S55, first distance can be by
It is determined as pixel " distortion " value (operation S57).
Operation S51 can be executed by hue coordinate computing unit 330.
More specifically, hue coordinate computing unit 330 can analyze the first image block DB1 (image block analyzed), and
And based on correspond to the first image block DB1 in each pixel P pixel data Px determine its color light modulation hue coordinate and
Its non-dimmable hue coordinate.
Color light modulation hue coordinate and non-dimmable hue coordinate can be positioned at preset color seat as shown in fig. 11
Coordinate in mark system 90.In the exemplary embodiment, preset color coordinate system 90 can be 1976 hue coordinate of CIE
System.The advantages of 1976 color coordinate system of CIE, is that the geometric distance between the hue coordinate point of 1976 coordinate systems is basic
Perception difference between the color of upper and human visual system perception is linearly related.
As shown in fig. 11, reference zone 910, reference coordinate point W can be defined in preset color coordinate system 90
With determining region 930.
When display device 10 is not limited when (for example, power limit) dims it (or in other words, when its progress is non-
Light modulation), reference zone 910 (the reproducible gamut regions of a.k.a.) can be the color region expressed by display device 10.It can
Alternatively, reference zone 910 can be national television system committee (NTSC) reference color region.
Reference coordinate point W can be white point red, that green and blue gray value is equal.In other words, reference coordinate point W
It can be the hue coordinate of specific display device generated white when its R, G, B light source is driven by equal gray level.
Determine that region 930 is less than reference zone 910 and interior in reference zone 910 (the producible gamut regions of device), and
And the determination region 930 is used as calculating a standard of pixel improved values and pixel distortion value.Determine region 930
It is construed as including reference coordinate point W.Its R, G, B light source for being also structured to driving display device, so that not in reference area
Light source in the larger boundary in domain 910 (the producible gamut regions of device) is strong.In other words, if it is determined that the side in region 930
Boundary is not disturbed, and there will be no fully saturated R, G or B pixels, but on the other hand, when human visual system is not light
Easy perceptual image and initially expected when being slightly away from of image, the luminance energy of the image will be more uniform in rgb light source
Ground distribution, and electric power can be preferably saved.More specifically, if the pixel number for the image block (for example, DB1) analyzed
According to the Rg as the red gray value for including, the Gg as the green gray value for including and as the blue gray scale for including
The Bg of value, it is determined that region 930 can be defined as the region for meeting whole constraint conditions of equation (1) to (3):
|Rg-Gg|≤C1 (1)
|Gg-Bg|≤C2 (2)
|Bg-Rg|≤C3 (3)
Wherein, C1 to C3 can have the integer value selected in from 0 to 255 range, but not all can be
255.In other words, it is lower than 255 by reducing the one or more of C1, C2 and C3 constant, so that between the gray level of specific color
Permission difference it is less obvious.
That is, determining that region 930 can be the absolute value of the difference met between red sum of the grayscale values green gray value and should wait
It should be equal in or less than absolute value of the difference between the condition of the first setting value of C1, green sum of the grayscale values blue gray value
Or the absolute value of the difference between the condition of the second setting value less than C2, blue sum of the grayscale values red gray value should be equal to or
The region of the condition of third setting value of the person less than C3.Here, the first setting value to third setting value can be respectively 0 to 255
In the range of change, but it is not all can simultaneously be 255.Determine that the definition in region 930 can be predetermined and be stored in
In display device 10 or light supply apparatus BLU.
For the multiple pixel data Px being shown in FIG. 10, the picture being located in blue region IB (for example, blue sky background)
Prime number evidence can be defined as the first pixel data Pxa.In this case and refer to Figure 12, hue coordinate computing unit
330 can determine which light blue color pixel in analyzed image block (for example, DB1) is the non-dimmable color for not needing light modulation
Which light blue color pixel in coordinate CPxa1 (spot CPxa1) and the image block analyzed (for example, DB1) is to need to dim
Color dim hue coordinate CPxa2 (spot CPxa2), wherein the information is from the first pixel data Pxa (for example, blue sky picture
Element) it obtains and is placed in the color coordinate system 90 as being shown in FIG. 12.In the exemplary embodiment, because first
The representative color of image block DB1 is confirmed as blue as described above, and the color of the first pixel data Pxa dims hue coordinate
CPxa2 can be positioned the saturation Bluepoint compared with non-dimmable hue coordinate CPxa1 relatively closer to display device colour gamut 910
(B).In addition, since light modulation hue coordinate CPxa2 spot is located at the reference zone 910 for the display device being such as shown in FIG. 12
The outside of (the producible gamut regions of device), these points sequentially must be converted (such as dimming out) for respective brightness
It is generated with the display device (910) for becoming to be limited by colour gamut.
Similarly, for the pixel data Px (only with the pixel data of DB1) being shown in FIG. 10, positioned at what is analyzed
Pixel data in the white area IW of image block (for example, DB1) can be defined as the second pixel data Pxb.In this feelings
Under condition and Figure 13 is referred to, hue coordinate computing unit 330 can determine in color coordinate system 90 as shown in Figure 13
There are the non-dimmable hue coordinate CPxb1 of the second pixel data Pxb and color to dim hue coordinate CPxb2.In exemplary implementation
In mode, since the representative color of the first image block DB1 has been determined as blue as described above, and due to working as non-dimmable color
When coordinate CPxb1 closer white (W), the color light modulation hue coordinate CPxb2 of the second pixel data Pxb is positioned and white
(W) it compares relatively closer to blue (B), so ought realize when human visual system does not see the change of perception and simultaneously
When expectation in image to be shown improves (such as improvement contrast and/or reduction power consumption), color dims hue coordinate
CPxb2 can be moved closer to white (W).
Above-mentioned operation S52 to S57 can be executed by operating unit 350.
Specifically, with reference to Figure 14, operating unit 350 determines calculated first picture of hue coordinate computing unit 330 first
Whether prime number is located in predefined determining region 930 according to the non-dimmable hue coordinate CPxa1 of Pxa.As being shown in FIG. 14,
Since the non-dimmable hue coordinate CPxa1 of the first pixel data Pxa is located at the outside in determining region 930, so operating unit 350
Calculate the first distance da1 between color light modulation hue coordinate CPxa2 and non-dimmable hue coordinate CPxa1.In addition, operating unit
350 calculate the second distance da2 and reference coordinate point W and non-between reference coordinate point W and color light modulation hue coordinate CPxa2
Dim the third distance da3 between hue coordinate CPxa1.Operating unit 350 determines whether second distance da2 is equal to or more than the
Three distance da3.If it is determined that second distance da2 is equal to or more than third distance da3 (da2 >=da3), then operating unit 350
Determine that first distance da1 is pixel " improved values ".On the other hand, if it is determined that second distance da2 is less than third distance da3 (da2
< da3), then operating unit 350 determines that first distance da1 is pixel " distortion " value.In the illustrative embodiments provided,
Because the second distance da2 in Figure 14 is greater than third distance da3, operating unit 350 determines that first distance da1 is the first picture
Prime number according to Pxa pixel improved values.
Coordinate positioned at the outside for determining region 930 is poor to human vision between red, green and blue gray value
The more obvious position of system.Therefore, strong color characteristics are shown.If color light modulation is used in these regions
On the pixel data of the coordinate of 930 outsides, and if color light modulation hue coordinate is relatively colourless to be moved closer to
Reference coordinate point W, then color Dimming operation will reduce color characteristics outstanding.Therefore, color light modulation hue coordinate and non-tune
This range difference (relative to white W) between light hue coordinate is confirmed as pixel distortion value.On the other hand, if carrying out face
Tone light, and if the color light modulation hue coordinate being related to quilt on the direction far from (relatively colourless) reference coordinate point W
Mobile, then the color light modulation planned increases color characteristics (so that more life-like) outstanding.Therefore, in the latter case, face
The distance between tone light hue coordinate and non-dimmable hue coordinate are confirmed as pixel " improvement " value.
Similarly, with reference to Figure 15, operating unit 350 determines calculated second pixel number of hue coordinate computing unit 330
Whether it is located in determining region 930 according to the non-dimmable hue coordinate CPxb1 of Pxb.As being shown in FIG. 15, because of the second pixel
The non-dimmable hue coordinate CPxb1 of data Pxb is located at the inside for determining region 930, so operating unit 350 calculates color light modulation
First distance db1 between hue coordinate CPxb2 and non-dimmable hue coordinate CPxb1.In addition, more due to mobile CPxb2 spot
To reduce colouring discrimination close to relatively colourless reference coordinate point W, so the determination first distance db1 of operating unit 350 is the
The pixel distortion value of two pixel data Pxb.
It as mentioned, is considered as between red, green and blue gray value positioned at the coordinate determined inside region 930
Difference unconspicuous position in terms of color.Therefore, weaker color characteristics are shown, with the coordinate phase outside determining region 930
Than these coordinates are relatively closer to white color coordinates point (W).If the pixel data of these coordinates outside with 930 is enterprising
, most probably there is cross-color on the image that display panel 100 is shown in the light modulation of row color.Therefore, if non-dimmable color is sat
Mark is confirmed as picture in the inside for determining region 930, color light modulation the distance between hue coordinate and non-dimmable hue coordinate
Plain distortion value.
Determine whether that (it corresponds to the in the first light-emitting block based on determining pixel distortion value and the pixel improved values determined
One image block) on carry out color light modulation (or color light modulation driving) (operation S70) and can carry out as follows.
Referring to figs. 1 to Fig. 6 and Figure 16, in the exemplary embodiment, operation S70 may include: the picture by making block
Plain distortion value calculation block distortion value added together (operation S71), by the pixel improved values calculation block added together for making block
Improved values (operation S72), and determine whether to carry out color light modulation on the first light-emitting block based on block distortion value and block improved values
(or color light modulation driving) (operation S73).Operation S71 and S72 can be carried out in reverse order or simultaneously.
Above-mentioned operation S70 can be executed by pattern determining unit 370.
Figure 16 is the matrix for showing the value of each pixel data Px acquisition for the first image block DB1 of Figure 10.It is assumed that
Computing unit 350 determines that the value of the white area IW corresponding to Figure 10 obtained corresponds to Figure 10 with what is obtained for pixel distortion value
Blue region IB value be pixel improved values.
Pattern determining unit 370 is changed and making pixel improved values and pixel distortion value added together respectively to respective
The summation of kind and distortion value, and therefore calculate total block improved values and total block distortion value.For example, as fruit block improved values be Ba and
Block distortion value is Bd, then pattern determining unit 370 can calculate Ba and Bd.Here, Ba can have by make a1 to a52,
A54, a55, a57 are added the value obtained to a63, a70 to a76, a78, a79 with a81 to a108.Similarly, Bd can have logical
Crossing makes a53, a56, a64 be added the value obtained with a80 to a69, a77.
Pattern determining unit 370 is based on block distortion value Bd and is determined whether corresponding to light source module based on block improved values Ba
Color light modulation is carried out on the first light-emitting block (B1) of 200 the first image block DB1.
In the exemplary embodiment, as fruit block distortion value Bd be greater than block improved values Ba, pattern determining unit 370 can be true
It is fixed that planned color light modulation is carried out not on the first light-emitting block.Correspondingly, pattern determining unit 370 can not be to light source module
Driving unit 390 provides the color dim signal of the first light-emitting block generated by image analyzing unit 310.If image analysis list
Member 310 also generates brightness dim signal, and pattern determining unit 370 can be merely provided for the brightness dim signal of the first light-emitting block
To light source module driving unit 390.
In the exemplary embodiment, as fruit block distortion value Bd be less than block improved values Ba, pattern determining unit 370 can be true
It is scheduled on progress color light modulation on the first light-emitting block.Correspondingly, pattern determining unit 370 can provide the production of image analyzing unit 310
The raw color dim signal (or multiple color dim signals) for the first light-emitting block is to light source module driving unit 390.
If image analyzing unit 310 also generates brightness dim signal, pattern determining unit 370 can be provided for the first light-emitting block
Both color dim signal and brightness dim signal are to light source module driving unit 390.
However, above description is only example, pattern determining unit 370 is calibrated really will definitely be with variation.For example, mode determines
Unit 370 can be by least any one offer weighting to block distortion value Bd and block improved values Ba to generate value and based on production
Raw value determines whether to carry out color light modulation on the first light-emitting block.That is, calibrate really will definitely be with basis for pattern determining unit 370
It needs suitably to change, the range of the disclosure is not limited to above-mentioned example embodiment.
More specifically, according to one embodiment, before the specific color Dimming operation planned, acquisition is analyzed
Each of image block (for example, DB1) pixel pixel distortion value and pixel improved values, and be based on pixel obtained
Distortion value and pixel improved values, it is determined whether the specific color light modulation driving actually planned.It can thus be avoided subtracting
The amount of few cross-color that can occur as caused by the specific color light modulation planned is (for example, color contrast or particularity
Reduction).
In addition, by considering that the colouring information of each pixel in analyzed image block (for example, DB1) determines whether
Carry out color light modulation driving.Therefore, compared with the case where driving with progress color light modulation without determination process, it can reduce face
Colour distortion simultaneously improves colorrendering quality.It is thus possible to improve the display quality of display device.
The embodiment of disclosure according to the present invention can provide at least one of following advantages.
They can provide a kind of side of driving light source module that can improve display quality and/or reduce power consumption
Method.
They can provide a kind of method of driving light source module that can improve colorrendering quality and reduce cross-color.
However, the advantageous effects of the embodiment of disclosure according to the present invention are not limited to effect set forth herein.
After carefully browsing this introduction, the above-mentioned and other effect of this introduction will become more aobvious to those skilled in the art
And it is clear to.
Although the disclosure, this field are specifically illustrated and described with reference to its illustrative embodiments
Ordinarily skilled artisan will understand that, under the premise of without departing substantially from the spirit and scope of this introduction, form can be made wherein
With the various changes in details.Illustrative embodiments should be considered as the meaning merely for description rather than in order to limit.
Claims (12)
1. a kind of method for driving light source module as unit of light-emitting block, the light source module provides light to having multiple pixels
Display panel and including multiple light-emitting blocks, which comprises
Described image signal is divided into the multiple images block corresponding to the multiple light-emitting block by analysis picture signal；
Generate the color dim signal of the first image block corresponded in described multiple images block；
The pixel distortion value and pixel improved values for corresponding to each pixel are obtained by analysis the first image block；
Determined whether based on the pixel distortion value and the pixel improved values to the first hair corresponding with the first image block
Light block carries out color light modulation；And
First light-emitting block is driven based on definitive result,
Wherein, it obtains the pixel distortion value and the pixel improved values includes: to be calculated pre- by analyzing the first image block
Corresponding to the color light modulation hue coordinate and non-dimmable hue coordinate of each pixel in fixed color coordinate system；Described in being based on
Color dims hue coordinate and the non-dimmable hue coordinate calculates the pixel distortion value and the pixel improved values,
Wherein, the scheduled color coordinate system is CIE 1976,
Wherein, it calculates the pixel distortion value and the pixel improved values includes determining whether the non-dimmable hue coordinate is located at
In the predefined determining region with preset reference coordinate in the color coordinate system,
Wherein, it calculates the pixel distortion value and the pixel improved values includes: if it is determined that the non-dimmable hue coordinate does not have
Have and be located in the determining region, then: calculating the between color light modulation hue coordinate and the non-dimmable hue coordinate
One distance, second distance and the reference coordinate and institute between the reference coordinate and color light modulation hue coordinate
State the third distance between non-dimmable hue coordinate；If the second distance is equal to or more than the third distance, it is determined that
The first distance is pixel improved values；And if the second distance is less than the third distance, it is determined that described first
Distance is pixel distortion value.
2. according to the method described in claim 1, wherein, the reference coordinate is red gray value, green gray value and blue
The coordinate that gray value is equal to each other.
3. according to the method described in claim 2, wherein, the determining region is the region for meeting the following conditions: the red
Absolute value of the difference between green gray value described in sum of the grayscale values is equal to or less than the first setting value, the green sum of the grayscale values
Absolute value of the difference between the blue gray value is equal to or less than described in the second setting value and the blue sum of the grayscale values
Absolute value of the difference between red gray value is equal to or less than third setting value.
4. according to the method described in claim 1, wherein, calculating the pixel distortion value and the pixel improved values further being wrapped
It includes:
If it is determined that the non-dimmable hue coordinate is located in the determining region, then:
Calculate the first distance between the color light modulation hue coordinate and the non-dimmable hue coordinate；And determine described first
Distance is pixel distortion value.
5. according to the method described in claim 1, wherein, being determined whether based on the pixel distortion value and the pixel improved values
Carrying out color light modulation to first light-emitting block includes:
By by the pixel distortion value it is added together calculate the first image block block distortion value；
By by the pixel improved values it is added together calculate the first image block block improved values；With
Determine whether to carry out color light modulation to first light-emitting block based on described piece of distortion value and described piece of improved values.
6. according to the method described in claim 1, wherein, each of the multiple light-emitting block includes one or more units
Light-emitting block, wherein each of described unit light-emitting block includes the first light source for issuing the light of the first color, issues the second face
The third light source of the light of the second light source and sending third color of the light of color.
7. a kind of display device, comprising:
Light source module, including multiple light-emitting blocks；
Display panel, including multiple pixels and the multiple images that are divided into each light-emitting block corresponding to the multiple light-emitting block it is aobvious
Show block；
Light source module control unit, is configured as the picture signal of supply being divided into and respectively correspond tos described multiple images displaying block
In corresponding one multiple images block, generate correspond to described multiple images block in the first image block color dim letter
Number, the pixel that passes through analysis the first image block determine corresponding with each pixel in the image block analyzed pixel distortion
Value and pixel improved values, based on the pixel distortion value and the pixel improved values determine whether to the first image block pair
The first light-emitting block answered carries out color light modulation and drives first light-emitting block based on definitive result,
Wherein, the light source module control unit includes: image analyzing unit, and being configured as will by analysis described image signal
Described image signal is divided into described multiple images block and is produced by the first image block in analysis described multiple images block
The raw color dim signal；Hue coordinate computing unit is configured as calculating scheduled by analyzing the first image block
Corresponding to the color light modulation hue coordinate and non-dimmable hue coordinate of each pixel in color coordinate system；Operating unit is matched
It is set to and the pixel distortion value and the pixel is calculated based on color light modulation hue coordinate and the non-dimmable hue coordinate
Improved values；Pattern determining unit is configured as determining whether based on the pixel distortion value and the pixel improved values to described
First light-emitting block carries out color light modulation；With light source module driving unit, it is configured as the determination based on the pattern determining unit
As a result each light-emitting block of the light source module is driven,
Wherein, the scheduled color coordinate system is CIE 1976,
Wherein, the operating unit determines whether the non-dimmable hue coordinate is located at having in the color coordinate system
In the predefined determining region of preset reference coordinate,
Wherein, when determining that the non-dimmable hue coordinate is not in the determining region, the operating unit calculates institute
State first distance, the reference coordinate and the color tune between color light modulation hue coordinate and the non-dimmable hue coordinate
The third distance between second distance and the reference coordinate and the non-dimmable hue coordinate between light hue coordinate,
If the second distance is equal to or more than the third distance, it is determined that the first distance is the pixel improved values, such as
Second distance described in fruit is less than the third distance, it is determined that the first distance is the pixel distortion value.
8. display device according to claim 7, wherein each of the multiple light-emitting block includes one or more
Unit light-emitting block, wherein each of described unit light-emitting block includes the first light source for issuing the light of the first color, issues the
The third light source of the light of the second light source and sending third color of the light of second colors.
9. display device according to claim 7, wherein the reference coordinate be red gray value, green gray value and
The coordinate that blue gray value is equal to each other.
10. display device according to claim 9, wherein the determining region is the region for meeting the following conditions: described
Absolute value of the difference between green gray value described in red sum of the grayscale values is equal to or less than the first setting value, the green gray scale
Absolute value of the difference between value and the blue gray value is equal to or less than the second setting value and the blue sum of the grayscale values
Absolute value of the difference between the red gray value is equal to or less than third setting value.
11. display device according to claim 7, wherein when determining that the non-dimmable hue coordinate is located at the determination
When in region, the operating unit calculate between color light modulation hue coordinate and the non-dimmable hue coordinate first away from
From and determine that the first distance is the pixel distortion value.
12. display device according to claim 7, wherein the pattern determining unit is by by the pixel distortion value
The block distortion value added together for calculating the first image block, by will be described in the pixel improved values calculating added together
The block improved values of first image block；And the tune of first light-emitting block is determined based on described piece of distortion value and described piece of improved values
Optical drive mode.
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| KR10-2014-0018644 | 2014-02-18 | ||
| KR1020140018644A KR102157245B1 (en) | 2014-02-18 | 2014-02-18 | Method of driving light-source and display apparatus for performing the method |
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| JP (1) | JP6549360B2 (en) |
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| CN106658852B (en) * | 2016-12-27 | 2019-01-25 | 广州市雅江光电设备有限公司 | A kind of calculation method for LED lamp perseverance illumination |
| KR102545211B1 (en) * | 2018-01-10 | 2023-06-19 | 삼성전자주식회사 | Electronic apparatus and control method thereof |
| US12062220B2 (en) * | 2018-11-01 | 2024-08-13 | Signify Holding B.V. | Selecting a method for extracting a color for a light effect from video content |
| KR102689688B1 (en) * | 2019-09-25 | 2024-07-31 | 삼성전자주식회사 | Display apparatus and controlling method thereof |
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| CN102103838A (en) * | 2009-12-18 | 2011-06-22 | 乐金显示有限公司 | Driving method for local dimming of liquid crystal display device and apparatus using the same |
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| KR20040040699A (en) * | 2002-11-07 | 2004-05-13 | 삼성전자주식회사 | Apparatus and Method for compansation contrast |
| US8120570B2 (en) * | 2004-12-02 | 2012-02-21 | Sharp Laboratories Of America, Inc. | Systems and methods for tone curve generation, selection and application |
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| CN101640022A (en) * | 2008-05-07 | 2010-02-03 | 晶门科技有限公司 | Method and apparatus for dynamic backlight control |
| CN102103838A (en) * | 2009-12-18 | 2011-06-22 | 乐金显示有限公司 | Driving method for local dimming of liquid crystal display device and apparatus using the same |
| CN103093738A (en) * | 2011-11-08 | 2013-05-08 | 三星电子株式会社 | Display apparatus and control method thereof |
| CN102610197A (en) * | 2012-01-04 | 2012-07-25 | 香港应用科技研究院有限公司 | Adjusting the brightness level of an edge-lit backlight display unit |
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| KR20150097896A (en) | 2015-08-27 |
| KR102157245B1 (en) | 2020-09-18 |
| CN104851397A (en) | 2015-08-19 |
| JP2015152919A (en) | 2015-08-24 |
| JP6549360B2 (en) | 2019-07-24 |
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