CN105047141A - Split screen detection method and apparatus of multi-divided-zone dynamic backlight, and liquid crystal television set - Google Patents
Split screen detection method and apparatus of multi-divided-zone dynamic backlight, and liquid crystal television set Download PDFInfo
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- CN105047141A CN105047141A CN201510504491.8A CN201510504491A CN105047141A CN 105047141 A CN105047141 A CN 105047141A CN 201510504491 A CN201510504491 A CN 201510504491A CN 105047141 A CN105047141 A CN 105047141A
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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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
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
Abstract
The invention provides a split screen detection method and apparatus of multi-divided-zone dynamic backlight, and a liquid crystal television set. The detection method comprises: a spliced image of a normal image and a single-color test image is sent to a display screen, so that the normal image is displayed at a first display zone of the display screen and the single-color test image is displayed at a second display zone of the display screen; backlight data corresponding to all divided zones in the normal image at the first display zone are obtained; backlight data of each divided zone at the second display zone are determined to be identical with that of the divided zone at the same position at the first display zone and backlight brightness of the corresponding divided zone at the second display zone is controlled based on the backlight data. According to the invention, the backlight brightness of all divided zones in the single-color test image at the second display zone is displayed based on the backlight rightness of all divided zones in the normal image at the first display zone, thereby determining whether the dynamic backlight control function operation is normal or not.
Description
Technical field
The present invention relates to dynamic backlight control technology field, particularly relate to the split screen detection method of a kind of multi partition dynamic backlight, device and LCD TV.
Background technology
Along with light emitting diode (LightEmittingDiode, be called for short LED) development of technology and further investigation, LED has become a kind of main flow as the backlight of LCD TV, and in the middle of LED-backlit liquid crystal tv technology, LED multi partition dynamic backlight control technology can improve dynamic contrast and the stereovision of image preferably due to it, effectively can economize on electricity again, become the main flow of LCD TV area research and application gradually.
Have in the LED liquid crystal television of multi partition dynamic backlight controlling functions at present, can only by the whole image frame direct feel dynamic backlight controlling functions of observation display screen, but accurately cannot judge whether dynamic backlight controlling functions normally runs by the naked eyes of people, therefore how detecting whether dynamic backlight controlling functions normally run is the problem that this area needs solution badly.
Summary of the invention
The invention provides the split screen detection method of a kind of multi partition dynamic backlight, device and LCD TV, to solve the problem how detecting dynamic backlight controlling functions and whether normally run.
First aspect, the invention provides the split screen detection method of a kind of multi partition dynamic backlight, comprising:
The stitching image of normal picture and single color test image is sent to display screen, to make the first viewing area display normal picture of display screen, the second viewing area display single color test image of display screen;
Obtain the backlight data that in described first viewing area, all subregions are corresponding in described normal picture;
By identical for the backlight data that the backlight data of each subregion in described second viewing area is defined as the subregion identical with position in described first viewing area, and control according to the backlight illumination of described backlight data to subregion corresponding in described second viewing area.
Second aspect, the invention provides the split screen pick-up unit of a kind of multi partition dynamic backlight, comprising:
Image processing module, for sending the stitching image of normal picture and single color test image to display screen, to make the first viewing area display normal picture of display screen, the second viewing area display single color test image of display screen;
Described image processing module, also for obtaining the backlight data that in described first viewing area, all subregions are corresponding in described normal picture;
Backlight processing module, backlight data for the backlight data of each subregion in described second viewing area being defined as the subregion identical with position in described first viewing area is identical, and controls according to the backlight illumination of described backlight data to subregion corresponding in described second viewing area.
The third aspect, the invention provides a kind of LCD TV, comprising:
Video frequency processing chip, display screen, time schedule controller, backlight drive circuit;
Described video frequency processing chip, for sending the stitching image of normal picture and single color test image to display screen;
Described display screen, shows described normal picture for the control by described time schedule controller in the first viewing area, shows described single color test image in the second viewing area;
Described video frequency processing chip, also for obtaining the backlight data that in described first viewing area, all subregions are corresponding in described normal picture;
By identical for the backlight data that the backlight data of each subregion in described second viewing area is defined as the subregion identical with position in described first viewing area,
Described backlight drive circuit, the backlight illumination of backlight data to subregion corresponding in described second viewing area for each subregion in described second viewing area determined according to described video frequency processing chip controls.
The split screen detection method of multi partition of the present invention dynamic backlight, device and LCD TV, display screen is divided into different viewing area, at the first viewing area display normal picture, second viewing area display single color test image, in second viewing area, the backlight data of the subregion that the backlight data of each subregion is identical with position in the first viewing area is identical, and the backlight illumination of subregion corresponding in the second viewing area is controlled according to this backlight data, therefore when the second viewing area display single color test image of display screen, the backlight illumination of all subregions in single color test image in second viewing area, show according to the backlight illumination of all subregions in normal picture in the first viewing area, namely in the first viewing area, the backlight illumination change of different subregion in normal picture can embody in the second viewing area, and in the second viewing area, show the backlight illumination change that single color test image is convenient to the different subregion of paired observation, if the backlight illumination of different subregion is different in the second viewing area, and when the normal picture in the first viewing area changes, in second viewing area, the backlight illumination of different subregion also changes thereupon, due to the second viewing area display single color test image, therefore dynamic backlight controlling functions normal operation can be judged by the situation of the backlight illumination of subregion different in the second viewing area, thus achieve and how to detect dynamic backlight controlling functions and whether normally run.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of split screen detection method one embodiment of multi partition of the present invention dynamic backlight;
Fig. 2 is territory, the display screen subsection schematic diagram of the inventive method embodiment;
Fig. 3 A is the backlight multi partition schematic diagram of the inventive method embodiment;
Fig. 3 B is the design sketch of the display display of the inventive method embodiment;
Fig. 4 is the schematic flow sheet of another embodiment of split screen detection method of multi partition of the present invention dynamic backlight;
Fig. 5 is the subregion backlight control theory diagram of the inventive method embodiment;
Fig. 6 is the multichannel backlight drive circuit theory diagram of the inventive method embodiment;
Fig. 7 is the structural representation of split screen pick-up unit one embodiment of multi partition of the present invention dynamic backlight;
Fig. 8 is the structural representation of another embodiment of split screen pick-up unit of multi partition of the present invention dynamic backlight;
Fig. 9 is the structural representation of LCD TV one embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Method involved by the embodiment of the present invention, can be applied in the LCD TV with LED subregion dynamic backlight controlling functions.
With embodiment particularly, technical scheme of the present invention is described in detail below.These specific embodiments can be combined with each other below, may repeat no more for same or analogous concept or process in some embodiment.
Fig. 1 is the schematic flow sheet of split screen detection method one embodiment of multi partition of the present invention dynamic backlight.Whether the executive agent of the present embodiment can be the split screen pick-up unit of multi partition dynamic backlight, and this device can be arranged in LCD TV, normally run for the dynamic backlight controlling functions detecting LCD TV.As shown in Figure 1, the method for the present embodiment comprises:
Step 101, send the stitching image of normal picture and single color test image to display screen, to make the first viewing area display normal picture of display screen, the second viewing area display single color test image of display screen;
Step 102, obtain the backlight data corresponding in normal picture of all subregions in the first viewing area;
Step 103, the backlight data backlight data of subregion each in the second viewing area being defined as the subregion identical with position in the first viewing area are identical, and control according to the backlight illumination of this backlight data to subregion corresponding in the second viewing area.
Specifically, the viewing area of display screen can divide by the method for the present embodiment before the implementation in advance, be divided into the first viewing area and the second viewing area, and the number of the first viewing area and the second viewing area does not limit.Concrete division position can divide along the left and right directions of display screen, also can divide, not in this, as restriction along the above-below direction of display screen.
First, send the stitching image of normal picture and single color test image to display screen, to make the first viewing area display normal picture of display screen, the second viewing area display single color test image of display screen.Fig. 2 is territory, the display screen subsection schematic diagram of the inventive method embodiment, and as shown in Figure 2, in figure, left-half is the first viewing area, display normal picture, and right half part is the second viewing area, display single color test image.
Wherein, in actual applications, this single color test image can be the image of same GTG, namely can be the homogeneous image of any same GTG, in order to effectively outstanding backlight effect, preferably selects whole white image.
Fig. 3 A is the backlight multi partition schematic diagram of the inventive method embodiment, and as shown in Figure 3A, whole backlight matrix comprises M the subregion in A direction and N number of subregion in B direction, supposes M=16, N=9 in the present embodiment.The 1-8 on the left side is classified as subregion corresponding to the first viewing area, and the right 9-16 is classified as subregion corresponding to the second viewing area.The subregion backlight of the first viewing area is according to the backlight data change of each subregion in the normal picture of the first viewing area.Above-mentioned subregion can be ready-portioned in advance.
Then, obtain the backlight data that in the first viewing area, all subregions are corresponding in normal picture, this backlight data reflects that in the first viewing area, in all subregions, correspondence shows normal picture monochrome information, be embodied in, this subregion correspondence display normal picture content brightness is large, this subregion backlight data is large, namely obtain 1-8 in Fig. 3 A and arrange all subregions backlight data corresponding in normal picture, backlight data can be specifically a brightness value of 0-255, the backlight illumination of the backlight that brightness value this subregion larger is corresponding is larger, and namely display screen display is brighter.
By identical for the backlight data that the backlight data of subregion each in the second viewing area is defined as the subregion identical with position in the first viewing area, namely in Fig. 3 A, in the second viewing area, the backlight data of all subregions of 9-16 row is identical with the backlight data of the subregion of 1-8 row same position in the first viewing area respectively, also namely the backlight data of subregion 9 is identical with the backlight data of subregion 1 in the first viewing area, the backlight data of subregion 10 is identical with the backlight data of subregion 2 in the first viewing area, by that analogy, suppose that the backlight data of subregion 1 in the first viewing area is 255, then in the second viewing area, the backlight data of subregion 9 is also 255, in first viewing area, the backlight data of subregion 1 is 0, then in the second viewing area, the backlight data of subregion 9 is also 0, can control the backlight illumination of subregion 9 in the second viewing area according to this backlight data.In second viewing area, the backlight illumination of the backlight of all subregions is all carry out controlling according to the backlight data of the subregion identical with position in the first viewing area.
In sum, in first viewing area, the backlight illumination change of normal picture can embody in the second viewing area, the subregion that in first viewing area, normal picture brightness is higher, the identical subregion brightness in second position in viewing area is also higher, the subregion that in first viewing area, normal picture brightness is lower, the identical subregion brightness in second position in viewing area is also lower, and second shows single color test image in viewing area and is convenient to the change of paired observation backlight illumination, what in second viewing area on i.e. right side, backlight subarea was shown is the dynamic backlight effect of normal picture in the first viewing area, left side, if the backlight illumination of different subregion is different in the second viewing area, and when the normal picture in the first viewing area changes, in second viewing area, the backlight illumination of different subregion also changes thereupon, then can judge dynamic backlight controlling functions normal operation, otherwise it is abnormal, can detect or demonstrate the dynamic backlight controlling functions of the first viewing area by the second viewing area with this or effect whether normal.
Wherein, in actual applications, the first viewing area and the second viewing area can size identical and be symmetrical arranged in display screen, the first viewing area and the second viewing area comprise identical subregion number.
First viewing area and the second viewing area can be symmetrical set in display screen, or are symmetrical arranged up and down.
First viewing area also can not be identical with the second viewing area size, and the first viewing area is not identical with the subregion number that the second viewing area comprises, and the present invention does not limit this.
Fig. 3 B is the design sketch of the display display of the inventive method embodiment.Because the average gray value of the image of subregion different in normal picture picture may be different, the backlight data of the different subregions calculated thus also has difference, average gray value is added up by all pixels comprised in subregion and is got, and can be the weighted results of maximal value and mean value.As shown in Figure 3 B, the image averaging gray-scale value of floral parts is comparatively large, and corresponding backlight data is comparatively large, and backlight illumination is higher, and background parts image averaging gray-scale value is less, and corresponding backlight data is less, and backlight illumination is lower; Corresponding, in second viewing area, the backlight data of the correspondence position of floral parts is larger, brightness is higher, the backlight data of the correspondence position of background parts is less, brightness is lower, naked eyes just intuitively can find out that subregion brightness changes, thus can judge dynamic backlight controlling functions or effect whether normal.
Said method, can by increasing the option of " dynamic backlight detects/demonstration " when realizing in the user interface of LCD TV, and user can start detection pattern after selecting this option.
The split screen detection method of the multi partition dynamic backlight that the embodiment of the present invention provides, display screen is divided into different viewing area, at the first viewing area display normal picture, second viewing area display single color test image, in second viewing area, the backlight data of the subregion that the backlight data of each subregion is identical with position in the first viewing area is identical, and the backlight illumination of subregion corresponding in the second viewing area is controlled according to this backlight data, therefore when the second viewing area display single color test image of display screen, the backlight illumination of all subregions in second viewing area in single color test image shows according to the backlight illumination of all subregions in normal picture in the first viewing area, namely in the first viewing area, the backlight illumination change of different subregion in normal picture can embody in the second viewing area, and in the second viewing area, show the backlight illumination change that single color test image is convenient to the different subregion of paired observation, if the backlight illumination of different subregion is different in the second viewing area, and when the normal picture in the first viewing area changes, in second viewing area, the backlight illumination of different subregion also changes thereupon, due to the second viewing area display single color test image, therefore dynamic backlight controlling functions normal operation can be judged by the situation of the backlight illumination of subregion different in the second viewing area, because of thus achieve and how to detect dynamic backlight controlling functions and whether normally run.
In another embodiment of the inventive method, on the basis of the embodiment shown in Fig. 1, in actual applications, the concrete mode obtaining the backlight data that all subregions are corresponding in normal picture in the first viewing area can have multiple, optionally, as the enforceable mode of one, can specifically carry out in the following ways:
Mode one: the backlight data determining this subregion according to the brightness value of subregion each in the first viewing area all pixels in normal picture.
Specifically, this device is after the view data receiving signal source input, normal picture in this view data and single color test image are compressed respectively, gets stitching image, this normal picture and single color test image corresponding first viewing area and the second viewing area respectively; Backlight data can be extracted from the normal picture of the stitching image after compression, then be mapped as the backlight data that the subregion of the first viewing area is corresponding; Backlight data can be determine according to the brightness value of all pixels in normal picture.
A normal picture picture comprises multiple pixel, the number of pixel is much larger than the number of subregion, therefore each subregion can comprise multiple pixels of this normal picture, finally determines the backlight data of this subregion according to the brightness value of this subregion all pixels in normal picture.
In mode two: the first viewing area, the backlight data of each subregion can be extracted from unpressed original digital image data, is then mapped as the backlight data that the subregion of the first viewing area is corresponding;
Specifically, this device is after the view data receiving signal source input, normal picture in this view data and single color test image are compressed respectively, gets stitching image, this normal picture and single color test image corresponding first viewing area and the second viewing area respectively; Backlight data can be extracted from the normal picture of original digital image data, then be mapped as the backlight data that the subregion of the first viewing area is corresponding; Backlight data can be determine according to the brightness value of all pixels in normal picture.
Further, determine the backlight data of this subregion according to the brightness value of subregion each in the first viewing area all pixels in normal picture, can specifically carry out in the following ways:
Obtain mean value and the maximal value of the brightness value of all pixels of each subregion in normal picture in the first viewing area, using the backlight data of the weighted sum of mean value and maximal value as this subregion.
Specifically, as shown in Figure 3A, obtain the brightness value that 1-8 in the first viewing area arranges all pixels of each subregion in normal picture in all subregions, the brightness value of pixels all in this subregion is averaged and obtains mean value, and obtain maximal value, and this mean value and maximal value are weighted the backlight data of summation as this subregion.Weighting coefficient can be preset value.
Certainly in other embodiments of the invention, also can be obtained the backlight data of subregion by other algorithms, the present invention does not limit this.
In above-mentioned embodiment, by determining the backlight data of this subregion according to the brightness value of subregion each in the first viewing area all pixels in normal picture, and the backlight data of this subregion specifically can be determined according to the mean value of brightness value and maximal value, achieve the backlight data that in acquisition first viewing area, all subregions are corresponding in normal picture.
On the basis of above-mentioned embodiment, further, in actual applications, after determining the backlight data of each subregion in the second viewing area, control according to the backlight illumination of this backlight data to subregion corresponding in the second viewing area, can specifically operate in the following way:
According to the mapping relations preset, determine the actual backlight that in the second viewing area, all subregions are corresponding in display screen;
Control according to the backlight illumination of backlight data to actual backlight.
Specifically, first according to the mapping relations preset, determine that the actual backlight that all subregions in the second viewing area are corresponding in display screen, these mapping relations refer to the mapping relations between subregion in the second viewing area actual backlight corresponding with subregion.Actual backlight can be LED backlight in embodiments of the present invention, and the backlight illumination according to the backlight data pair actual backlight corresponding with this subregion of each subregion controls.
The corresponding actual backlight of each subregion in second viewing area, but the pixel comprised in each subregion is a lot, the such as display screen of 3840*2160 resolution, be divided into the subregion of 16*9, the pixel number of 240*240 is just comprised in each subregion, but these 240*240 pixels are all same actual backlight behind controls backlight illumination according to the backlight data of subregion corresponding to this actual backlight, and the backlight data that namely in each subregion, all pixels are corresponding is a value.
Adopt a specific embodiment below, to how to be described in detail to the technical scheme that the backlight illumination of the subregion of correspondence in the second viewing area controls according to the backlight data got.
Fig. 4 is the schematic flow sheet of another embodiment of split screen detection method of multi partition of the present invention dynamic backlight.Fig. 5 is the subregion backlight control theory diagram of the inventive method embodiment.Fig. 6 is the multichannel backlight drive circuit theory diagram of the inventive method embodiment.As shown in Figure 4, provide the specific embodiment how detecting dynamic backlight controlling functions whether normal course of operation in the present embodiment, specifically comprise the steps:
Step 101, send the stitching image of normal picture and single color test image to display screen, to make the first viewing area display normal picture of display screen, the second viewing area display single color test image of display screen;
Step 102, determine the backlight data of this subregion according to the brightness value of subregion each in the first viewing area all pixels in normal picture;
Step 1031, the backlight data backlight data of subregion each in the second viewing area being defined as the subregion identical with position in the first viewing area are identical;
The mapping relations that step 1032, basis are preset, determine the actual backlight that in the second viewing area, all subregions are corresponding in display screen;
Step 1033, the PWM controller sending to actual backlight corresponding PWM dutycycle corresponding for backlight data, export pwm control signal according to described dutycycle to actual backlight to make PWM controller.
Step 101, step 102 can be realized by image processing module as shown in Figure 5, image processing module sends image to display screen, and control display screen display image by time schedule controller, concrete principle can see previous embodiment, step 1031 can by backlight processing modules implement as shown in Figure 5, concrete principle see previous embodiment, can repeat no more herein.
Specifically, backlight processing module controls according to the backlight illumination of the backlight data got to subregion corresponding in the second viewing area, first, backlight processing module can according to the mapping relations preset, determine the actual backlight that in the second viewing area, all subregions are corresponding in display screen, this actual backlight is the LED string on right side in Fig. 6; Backlight processing module determines the dutycycle of corresponding pwm signal according to the backlight data of each subregion, suppose that backlight data is the brightness value of 0-255, then brightness value is larger, the dutycycle of pwm signal is larger, by the PWM controller that the dutycycle of the pwm signal determined sends to actual backlight corresponding, PWM controller exports control signal according to dutycycle to actual backlight, control the conducting situation of the metal-oxide-semiconductor be connected with LED string, thus control the actual backlight generation brightness corresponding with backlight data.
When said PWM controller produces the brightness corresponding with backlight data according to PWM Duty ratio control actual backlight, the amplitude of pwm signal can be a preset value, and namely actual output current is default.
Liquid crystal panel+backlight assembly shown in Fig. 5 is display screen, and wherein backlight assembly can comprise LED backlight.
In other embodiments of the present invention, backlight processing module can also send current data to PWM controller in advance, PWM controller adjusts actual output current according to current data and predetermined reference voltage Vref, thus controlling the actual backlight generation brightness corresponding with backlight data, in identical dutycycle situation, the backlight illumination of the larger correspondence of output current is larger.Actual output current Iout=(current data/Imax) × (Vref/Rs), wherein Vref is default reference voltage, and such as 500mV, Rs are the current sampling resistor below metal-oxide-semiconductor, is such as 1 Ω.Current data is arranged by operating the register of PWM controller usually, if the bit wide of register is 10bit, so Imax=1024 in formula, thus can Iout demand according to actual needs, carries out current data calculating.If such as need the electric current of 250mA, by above-mentioned formula, current data just needs to be set to 512.Usual PWM controller is formed by multiple chips cascade, and every chips can drive again multi-channel PWM signal to export to LED string.
The voltage transitions that DC/DC transducer in Fig. 6 is used for power supply to input is LED string required voltage; but also for maintaining stable voltage by the feedback of backfeed loop; protection can also be carried out to backlight processing module to detect; backlight processing module can send enable signal to DC/DC transducer after running; make DC/DC transducer start to carry out protection to backlight processing module to detect, avoid overvoltage or overcurrent.
The split screen detection method of the multi partition dynamic backlight that the present embodiment provides, display screen is divided into different viewing area, at the first viewing area display normal picture, second viewing area display single color test image, in second viewing area, the backlight data of the subregion that the backlight data of each subregion is identical with position in the first viewing area is identical, and determine the actual backlight that in the second viewing area, all subregions are corresponding, PWM controller corresponding to the actual backlight PWM dutycycle corresponding according to backlight data exports pwm control signal to actual backlight, control the backlight illumination of subregion corresponding in the second viewing area, therefore when the second viewing area display single color test image of display screen, the backlight illumination of all subregions in second viewing area in single color test image shows according to the backlight illumination of all subregions in normal picture in the first viewing area, namely in the first viewing area, the backlight illumination change of different subregion in normal picture can embody in the second viewing area, and in the second viewing area, show the backlight illumination change that single color test image is convenient to the different subregion of paired observation, if the backlight illumination of different subregion is different in the second viewing area, and when the normal picture in the first viewing area changes, in second viewing area, the backlight illumination of different subregion also changes thereupon, due to the second viewing area display single color test image, therefore dynamic backlight controlling functions normal operation can be judged by the situation of the backlight illumination of subregion different in the second viewing area, because of thus achieve and how to detect dynamic backlight controlling functions and whether normally run.
Fig. 7 is the structural representation of split screen pick-up unit one embodiment of multi partition of the present invention dynamic backlight.As shown in Figure 7, the split screen pick-up unit of the multi partition dynamic backlight of the present embodiment, can comprise: image processing module 701 and backlight processing module 702;
Image processing module 701, for sending the stitching image of normal picture and single color test image to display screen, to make the first viewing area display normal picture of display screen, the second viewing area display single color test image of display screen;
Image processing module 701, also for obtaining the backlight data that in the first viewing area, all subregions are corresponding in normal picture picture;
Backlight processing module 702, backlight data for the backlight data of subregion each in the second viewing area being defined as the subregion identical with position in described first viewing area is identical, and controls according to the backlight illumination of this backlight data to subregion corresponding in described second viewing area.
The device of the present embodiment can be integrated in LCD TV.
In the split screen pick-up unit of the multi partition dynamic backlight that the present embodiment provides, display screen is divided into different viewing area, at the first viewing area display normal picture, second viewing area display single color test image, in second viewing area, the backlight data of the subregion that the backlight data of each subregion is identical with position in the first viewing area is identical, and the backlight illumination of subregion corresponding in the second viewing area is controlled according to this backlight data, therefore when the second viewing area display single color test image of display screen, the backlight illumination of all subregions in second viewing area in single color test image shows according to the backlight illumination of all subregions in normal picture in the first viewing area, namely in the first viewing area, the backlight illumination change of different subregion in normal picture can embody in the second viewing area, and in the second viewing area, show the backlight illumination change that single color test image is convenient to the different subregion of paired observation, if the backlight illumination of different subregion is different in the second viewing area, and when the normal picture in the first viewing area changes, in second viewing area, the backlight illumination of different subregion also changes thereupon, due to the second viewing area display single color test image, therefore dynamic backlight controlling functions normal operation can be judged by the situation of the backlight illumination of subregion different in the second viewing area, because of thus achieve and how to detect dynamic backlight controlling functions and whether normally run
On basis embodiment illustrated in fig. 7, optionally, as the enforceable mode of one, image processing module 701, specifically for:
The backlight data of this subregion is determined according to the brightness value of subregion each in the first viewing area all pixels in normal picture.
Optionally, as the enforceable mode of one, image processing module 701, specifically for:
Obtain brightness value mean value and the maximal value of all pixels of each subregion in normal picture in the first viewing area, using the backlight data of the weighted sum of mean value and maximal value as this subregion.
Fig. 8 is the structural representation of another embodiment of split screen pick-up unit of multi partition of the present invention dynamic backlight, and on the architecture basics shown in Fig. 7, optionally, as the enforceable mode of one, as shown in Figure 8, in the present embodiment, backlight processing module 702, comprising:
First backlight processing unit 7021, for according to the mapping relations preset, determines the actual backlight that in the second viewing area, all subregions are corresponding in display screen;
Second backlight processing unit 7022, for controlling according to the backlight illumination of backlight data to actual backlight.
Optionally, as the enforceable mode of one, the second backlight processing unit 7022, specifically for:
By the PWM controller that PWM dutycycle corresponding for backlight data sends to actual backlight corresponding, export pwm control signal according to PWM dutycycle to actual backlight to make PWM controller.
Optionally, as the enforceable mode of one, the first viewing area is identical with the second viewing area size and be symmetrical arranged in display screen, and the first viewing area and the second viewing area comprise identical subregion number.
Optionally, as the enforceable mode of one, single color test image is the image of same GTG.
It should be noted that, for the split screen pick-up unit embodiment of multi partition dynamic backlight, because it is substantially corresponding to embodiment of the method, so relevant part illustrates see the part of embodiment of the method.
Fig. 9 is the structural representation of LCD TV one embodiment of the present invention.As shown in Figure 9, the LCD TV of the present embodiment, can comprise: video frequency processing chip 901, time schedule controller 902, display screen 903, backlight drive circuit 904;
Wherein, video frequency processing chip 901, for sending the stitching image of normal picture and single color test image to display screen 903;
Display screen 903, for the control by time schedule controller 902 at the first viewing area display normal picture, at the second viewing area display single color test image;
Video frequency processing chip 901, also for obtaining the backlight data that in the first viewing area, all subregions are corresponding in normal picture;
By identical for the backlight data that the backlight data of subregion each in the second viewing area is defined as the subregion identical with position in the first viewing area,
Backlight drive circuit 904, the backlight illumination of backlight data to subregion corresponding in the second viewing area for each subregion in the second viewing area of determining according to video frequency processing chip 901 controls.
Wherein, the LCD TV of the present embodiment can also comprise storer, for storage program and image data information; Particularly, program can comprise program code, and described program code comprises computer-managed instruction.Storer may comprise random access memory (randomaccessmemory is called for short RAM), still may comprise nonvolatile memory (non-volatilememory), such as at least one magnetic disk memory.
The LCD TV of the present embodiment can also comprise: host processor chip, for the program that execute store stores, control the technical scheme that miscellaneous part performs embodiment of the method shown in Fig. 1-Fig. 6, the LCD TV of the present embodiment, it is similar that it realizes the embodiment of the method shown in principle and technique effect and Fig. 1-Fig. 6, with reference to the embodiment of the method shown in figure 1-Fig. 6, can repeat no more herein.
Above-mentioned parts are communicated by one or more bus.It will be understood by those skilled in the art that the structure of the LCD TV shown in Fig. 9 does not form limitation of the invention, the parts more more or less than diagram can also be comprised, or combine some parts, or different parts are arranged.
In several embodiments that the application provides, should be understood that disclosed equipment and method can realize by another way.Such as, apparatus embodiments described above is only schematic, such as, the division of described unit or module, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or module can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of equipment or module or communication connection can be electrical, machinery or other form.
The described module illustrated as separating component can or may not be physically separates, and the parts as module display can be or may not be physical module, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can have been come by the hardware that programmed instruction is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (15)
1. a split screen detection method for multi partition dynamic backlight, is characterized in that, comprising:
Send the stitching image of normal picture and single color test image to display screen, to make the first viewing area of described display screen show described normal picture, the second viewing area of described display screen shows described single color test image;
Obtain the backlight data that in described first viewing area, all subregions are corresponding in described normal picture;
By identical for the backlight data that the backlight data of each subregion in described second viewing area is defined as the subregion identical with position in described first viewing area, and control according to the backlight illumination of described backlight data to subregion corresponding in described second viewing area.
2. method according to claim 1, is characterized in that, the backlight data that in described first viewing area of described acquisition, all subregions are corresponding in described normal picture, comprising:
The backlight data of this subregion is determined according to the brightness value of each subregion all pixels in described normal picture in described first viewing area.
3. method according to claim 2, is characterized in that, describedly determines the backlight data of this subregion according to the brightness value of each subregion all pixels in described normal picture in described first viewing area, comprising:
Obtain brightness value mean value and the maximal value of all pixels of each subregion in described normal picture in described first viewing area, using the backlight data of the weighted sum of described mean value and maximal value as this subregion.
4. the method according to any one of claim 1-3, is characterized in that, describedly controls according to the backlight illumination of described backlight data to subregion corresponding in described second viewing area, comprising:
According to the mapping relations preset, determine the actual backlight that in described second viewing area, all subregions are corresponding in described display screen;
Control according to the backlight illumination of described backlight data to described actual backlight.
5. method according to claim 4, is characterized in that, describedly controls according to the backlight illumination of described backlight data to described actual backlight, comprising:
By the PWM controller that PWM dutycycle corresponding for described backlight data sends to described actual backlight corresponding, export pwm control signal according to described PWM dutycycle to described actual backlight to make described PWM controller.
6. the method according to any one of claim 1-3, it is characterized in that, described first viewing area is identical with described second viewing area size and be symmetrical arranged in described display screen, and described first viewing area and described second viewing area comprise identical subregion number.
7. the method according to any one of claim 1-3, is characterized in that, described single color test image is the image of same GTG.
8. a split screen pick-up unit for multi partition dynamic backlight, is characterized in that, comprising:
Image processing module, for sending the stitching image of normal picture and single color test image to display screen, to make the first viewing area of described display screen show described normal picture, the second viewing area of described display screen shows described single color test image;
Described image processing module, also for obtaining the backlight data that in described first viewing area, all subregions are corresponding in described normal picture;
Backlight processing module, backlight data for the backlight data of each subregion in described second viewing area being defined as the subregion identical with position in described first viewing area is identical, and controls according to the backlight illumination of described backlight data to subregion corresponding in described second viewing area.
9. device according to claim 8, is characterized in that, described image processing module, specifically for:
The backlight data of this subregion is determined according to the brightness value of each subregion all pixels in described normal picture in described first viewing area.
10. device according to claim 9, is characterized in that, described image processing module, specifically for:
Obtain mean value and the maximal value of the brightness value of all pixels of each subregion in described normal picture in described first viewing area, using the backlight data of the weighted sum of described mean value and maximal value as this subregion.
11. devices according to Claim 8 described in-10 any one, it is characterized in that, described backlight processing module, comprising:
First backlight processing unit, for according to the mapping relations preset, determines the actual backlight that in described second viewing area, all subregions are corresponding in described display screen;
Second backlight processing unit, for controlling according to the backlight illumination of described backlight data to described actual backlight.
12. devices according to claim 11, is characterized in that, described second backlight processing unit, specifically for:
By the PWM controller that PWM dutycycle corresponding for described backlight data sends to described actual backlight corresponding, export pwm control signal according to described PWM dutycycle to described actual backlight to make described PWM controller.
13. devices according to Claim 8 described in-10 any one, it is characterized in that, described first viewing area is identical with described second viewing area size and be symmetrical arranged in described display screen, and described first viewing area and described second viewing area comprise identical subregion number.
14. devices according to Claim 8 described in-10 any one, it is characterized in that, described single color test image is the image of same GTG.
15. 1 kinds of LCD TV, is characterized in that, comprising:
Video frequency processing chip, display screen, time schedule controller, backlight drive circuit;
Described video frequency processing chip, for sending the stitching image of normal picture and single color test image to display screen;
Described display screen, shows described normal picture for the control by described time schedule controller in the first viewing area, shows described single color test image in the second viewing area;
Described video frequency processing chip, also for obtaining the backlight data that in described first viewing area, all subregions are corresponding in described normal picture;
By identical for the backlight data that the backlight data of each subregion in described second viewing area is defined as the subregion identical with position in described first viewing area,
Described backlight drive circuit, the backlight illumination of backlight data to subregion corresponding in described second viewing area for each subregion in described second viewing area determined according to described video frequency processing chip controls.
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Video Technology Co., Ltd Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: HISENSE ELECTRIC Co.,Ltd. |