CN104299601B - Mosaic screen backlight illumination Automatic adjustment method and device, mosaic screen - Google Patents
Mosaic screen backlight illumination Automatic adjustment method and device, mosaic screen Download PDFInfo
- Publication number
- CN104299601B CN104299601B CN201410421830.1A CN201410421830A CN104299601B CN 104299601 B CN104299601 B CN 104299601B CN 201410421830 A CN201410421830 A CN 201410421830A CN 104299601 B CN104299601 B CN 104299601B
- Authority
- CN
- China
- Prior art keywords
- display screen
- brightness
- regulated
- module
- screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention relates to technique of display field, disclose a kind of mosaic screen backlight illumination Automatic adjustment method, detect the backlight brightness values of multiple display screen; The backlight brightness values of multiple display screen is compared, setting benchmark display screen and display screen to be regulated; The backlight brightness values that the backlight brightness values of display screen to be regulated subtracts benchmark display screen obtains actual luminance difference; Actual luminance difference is converted to pulse width modulating signal difference, will wait to adjust pulse width modulating signal value to subtract the adjusted pulse width modulating signal value of pulse width modulating signal difference; The backlight module of display screen to be regulated receives corresponding adjustment pulse width modulating signal value, and performs. The present invention also provides mosaic screen backlight illumination automatic-adjusting device and a kind of mosaic screen.
Description
Technical field
The present invention relates to technique of display field, particularly relate to a kind of mosaic screen backlight illumination Automatic adjustment method and device, mosaic screen.
Background technology
CompactTV (compact type TV popular in recent years, i.e. narrow frame TV) and PID (PublicInformationDisplay, public information display) use range of mosaic screen is more and more wider, the splicing of mosaic screen requires also more and more higher, mosaic screen be exactly by multiple display screen as display unit with arranged (such as 2 �� 2, 3 �� 3, 4 �� 4 and bigger freely unlimited splicing) mosaic screen of a composition giant-screen, each display screen shows a part for an image, the mosaic screen of arranged both can show the bigger image of area jointly, a point screen display can also show different images.
Mosaic screen utilizes the display screen of more than two panels to be spliced, if the brightness display effect difference that the panel of this few display screen is shown under same color, then the place that viewing person connects at panel, the picture seen can be discontinuous. So panel factory is when making, the LED of same brightness and colourity must be selected to provide backlight, but due to the difference in the luminous efficiency of LED, the making difference of liquid crystal panel and mosaic screen assembling process, the display brightness of polylith display screen still can be caused inconsistent.
Summary of the invention
(1) technical problem solved
It is an object of the invention to provide mosaic screen backlight illumination Automatic adjustment method, with the automatic brightness adjustment between each display screen of realizing in mosaic screen, make the brightness between each display screen reach consistent, a kind of mosaic screen backlight illumination automatic-adjusting device and a kind of mosaic screen that mosaic screen backlight illumination automatic-adjusting device is housed are provided simultaneously.
(2) technical scheme
In order to solve the problems of the technologies described above, the present invention provides a kind of mosaic screen backlight illumination Automatic adjustment method, comprises the following steps:
S1: the backlight brightness values of multiple display screen in detection mosaic screen;
S2: the backlight brightness values of described multiple display screen compared, to set a benchmark display screen and at least one display screen to be regulated; The backlight brightness values that the backlight brightness values of display screen to be regulated described in each in display screen to be regulated described at least one subtracts described benchmark display screen is obtained actual luminance difference corresponding to display screen to be regulated described in each;
S3: actual luminance difference corresponding for described display screen to be regulated is converted to pulse width modulating signal difference; Detect described display screen to be regulated corresponding wait adjust pulse width modulating signal value, will treat tune pulse width modulating signal value subtract the adjusted pulse width modulating signal value of pulse width modulating signal difference;
S4: the backlight module of multiple described display screen to be regulated receives corresponding adjustment pulse width modulating signal value, and performs.
Wherein, also comprise step S2-3: set a predetermined luminance difference, by actual luminance difference corresponding for display screen to be regulated described in each respectively compared with predetermined luminance difference, when the actual luminance difference that described display screen to be regulated is corresponding is more than or equal to predetermined luminance difference, perform step S3 and S4, the backlight illumination of this display screen to be regulated is regulated; When the actual luminance difference that described display screen to be regulated is corresponding is less than predetermined luminance difference, the backlight illumination of this display screen to be regulated is not regulated.
Wherein, described step S1 specifically comprises: detect the backlight brightness values of described display screen with the critical part of adjacent display screen.
Wherein, described step S1 specifically comprises: the brightness value detecting the multiple position of back light guiding plate of described display screen, the mean value of brightness value getting multiple position is as backlight brightness values.
Wherein, described step S2 specifically comprises: the backlight brightness values of multiple described display screen compared, and minimum for backlight brightness values display screen is set as benchmark display screen, and other display screens are set as display screen to be regulated.
The present invention provides a kind of mosaic screen backlight illumination automatic-adjusting device, for regulating the backlight illumination of the display screen of multiple mosaic screen, comprising:
Multiple brightness detection module, on the inside light guiding plate that multiple described brightness detection module is separately positioned in mosaic screen multiple display screen, for the backlight brightness values of detection display screen;
Brightness processed module, it connects multiple described brightness detection module, for receiving the backlight brightness values of the multiple described display screen that described brightness detection module detects and compare the backlight brightness values of multiple described display screen, set a benchmark display screen and at least one display screen to be regulated, and calculate the actual luminance difference of display screen to be regulated described in each and benchmark display screen;
Brightness regulation module, it connects brightness processed module, for receiving the actual luminance difference of described display screen to be regulated and benchmark display screen, actual luminance difference corresponding for display screen to be regulated described in each is converted to pulse width modulating signal difference, calculates adjustment pulse width modulating signal value; And
Multiple display screen drives module, is separately positioned in the backlight module of multiple described display screen; Multiple described display screen drives module to connect brightness regulation module respectively, for receiving adjustment pulse width modulating signal corresponding to display screen to be regulated that described brightness regulation module calculates.
Wherein, this device also comprises the luminance difference comparison module being connected between described brightness processed module and brightness regulation module, described luminance difference comparison module is provided with predetermined luminance difference, for receive that described brightness processed module calculates each described in actual luminance difference corresponding to display screen to be regulated, actual luminance difference and predetermined luminance difference are compared, and determines whether that the backlight brightness values to display screen to be regulated regulates according to the result compared.
Wherein, described brightness processed module comprises the benchmark screen setting unit and actual luminance difference calculating unit that are connected; Described benchmark screen setting unit is connected with described brightness detection module respectively, for receiving the backlight brightness values that brightness detection module described in each detects, and compares, sets a benchmark display screen and at least one display screen to be regulated; Described actual luminance difference calculates the actual luminance difference of unit for calculating described in each between display screen to be regulated and benchmark display screen.
Wherein, described brightness regulation module comprises the pulse width modulating signal conversion unit being connected and pulse width modulating signal calculating unit; Described pulse width modulating signal conversion unit and described brightness processed model calling, for converting actual luminance difference corresponding for each display screen to be regulated to pulse width modulating signal difference; Described pulse width modulating signal calculates unit and described display screen drives model calling, for detect display screen to be regulated corresponding wait adjust pulse width modulating signal value, and will treat tune pulse width modulating signal value subtract the adjusted pulse width modulating signal value of pulse width modulating signal difference.
Wherein, described brightness detection module is made up of multiple brightness sensor, and most described brightness sensor settings is in the critical position of the display screen of splicing.
Wherein, described brightness processed module and brightness regulation module are programmable logic device; Described programmable logic device adopts complicated programmable logic device part or field-programmable gate array.
Wherein, described display screen drives module to be LED drive integrated circult.
Wherein, described brightness detection module, brightness processed module, luminance difference comparison module, brightness regulation module and display screen drive module integration on a printed circuit board (PCB).
The present invention also provides a kind of mosaic screen, comprises multiple mosaic screen backlight illumination automatic-adjusting device, the corresponding multiple display screen respectively of mosaic screen backlight illumination automatic-adjusting device described in each; One of them is main mosaic screen backlight illumination automatic-adjusting device, other are from mosaic screen backlight illumination automatic-adjusting device, and each is connected with described main mosaic screen backlight illumination automatic-adjusting device by communication bus respectively from mosaic screen backlight illumination automatic-adjusting device; Described main mosaic screen backlight illumination automatic-adjusting device is mosaic screen backlight illumination automatic-adjusting device described above; Described comprise from mosaic screen backlight illumination automatic-adjusting device:
Multiple brightness detection module, on the inside light guiding plate that multiple described brightness detection module is separately positioned in mosaic screen multiple display screen, for the backlight brightness values of detection display screen;
Multiple display screen drives module, is separately positioned in the backlight module of multiple described display screen;
Described communication bus is for sending the described brightness data detected from the brightness detection module mosaic screen backlight illumination automatic-adjusting device to brightness processed module in main mosaic screen backlight illumination automatic-adjusting device, after described brightness processed module and brightness regulation module process successively, the data that the brightness regulation module of described main mosaic screen backlight illumination automatic-adjusting device exports are sent to described from the display screen driving module mosaic screen backlight illumination automatic-adjusting device.
(3) useful effect
Mosaic screen backlight illumination Automatic adjustment method provided by the invention and device thereof, by the backlight brightness values of each display screen in detection mosaic screen, backlight brightness values is compared, using a display screen as benchmark display screen, if the display screen selecting backlight brightness values minimum is as benchmark display screen, regulate the backlight brightness values of other display screens, so that the brightness between each display screen reaches consistent, control method is simple, it is easy to realize, and effect stability.
Accompanying drawing explanation
Fig. 1 is the schema of mosaic screen backlight illumination Automatic adjustment method embodiment of the present invention;
Fig. 2 is mosaic screen backlight illumination automatic-adjusting device example structure schematic diagram of the present invention;
Fig. 3 is the functional block diagram of the structural representation shown in Fig. 2;
Fig. 4 is the structural representation of mosaic screen embodiment of the present invention.
In figure, 1,2,3,4,5,6,7,8: display screen; 11,11-1: printed circuit board (PCB); 12: programmable logic device; 13,13-1: brightness detection module; 14,14-1:LED drive integrated circult; 20: communication bus; 30: brightness processed module; 31: benchmark screen setting unit; 32: actual luminance difference calculates unit; 33: luminance difference comparison module; 40: brightness regulation module; 41: pulse width modulating signal conversion unit; 42: pulse width modulating signal calculates unit.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail. Following instance is for illustration of the present invention, but is not used for limiting the scope of the invention.
With reference to, shown in Fig. 1 and 2, the mosaic screen backlight illumination Automatic adjustment method of the present invention, by regulating the display screen of display screen to drive the pulse width modulating signal value of module to change backlight illumination. The mosaic screen that the present embodiment is spliced to regulate 4 pieces of display screens, 4 pieces of display screens are designated as display screen 1, display screen 2, display screen 3 and display screen 4. It comprises the following steps:
Step S1: the backlight brightness values of the inside light guiding plate of each display screen in detection mosaic screen, the brightness value of display screen 1 is lum1, and the brightness value of display screen 2 is lum2, and the brightness value of display screen 3 is lum3, and the brightness value of display screen 4 is lum4. It is affect mosaic screen display effect the most significantly due to the backlight brightness values difference value between adjacent display screen, it is thus preferred that detection display shields the backlight brightness values of the critical part with adjacent display screen. When shielding the backlight brightness values of 1 such as detection display, the backlight brightness values of critical part position between detection display screen 1 and display screen 2. In order to improve the accuracy that backlight brightness values regulates, the brightness value of the multiple position of back light guiding plate shielded by detection display, the mean value of brightness value getting multiple position is as backlight brightness values.
Step S2: the backlight brightness values of multiple display screen compared, to set a benchmark display screen and at least one display screen to be regulated; The backlight brightness values that the backlight brightness values of each display screen to be regulated at least one display screen to be regulated subtracts benchmark display screen is obtained actual luminance difference B corresponding to each display screen to be regulated. In the present embodiment, being set as benchmark display screen with the display screen that backlight brightness values is minimum, other display screens are set as display screen to be regulated. The relatively brightness value of 4 display screens, assume that the brightness value lum4 of display screen 4 is minimum, display screen 4 is set as benchmark display screen, and namely the backlight brightness values min_lum of benchmark display screen equals lum4, and other display screens 1, display screen 2, display screen 3 are all set as display screen to be regulated. The backlight brightness values min_lum subtracting benchmark display screen with the backlight brightness values lum1 of display screen 1 obtains the actual luminance difference B1 of display screen 1 correspondence to be regulated; The backlight brightness values min_lum subtracting benchmark display screen with the backlight brightness values lum2 of display screen 2 obtains the actual luminance difference B2 of display screen 2 correspondence to be regulated; The backlight brightness values min_lum subtracting benchmark display screen with the backlight brightness values lum3 of display screen 3 obtains the actual luminance difference B3 of display screen 3 correspondence to be regulated.
Setting procedure S2-3 between step S2 to S3, step S2-3 is specially: set a predetermined luminance difference A, by actual luminance difference B corresponding for each display screen to be regulated respectively compared with predetermined luminance difference A, when the actual luminance difference B that display screen to be regulated is corresponding is more than or equal to predetermined luminance difference A, then step S3 and S4 is performed downwards, the backlight illumination of this display screen to be regulated is regulated, the backlight brightness values of this display screen to be regulated is met the requirements; When the actual luminance difference B that display screen to be regulated is corresponding is less than predetermined luminance difference, the backlight illumination of this display screen to be regulated is not regulated. Wherein, the size of predetermined luminance difference A can the distinguishable minimum luminance difference of reference men and women's eye. It is adjusted to example with display screen 1, if B1<A, then the backlight illumination difference shown between display screen 1 to be regulated and benchmark display screen can not be identified by the human eye, and need not carry out backlight illumination adjustment, namely do not jump to step S3, terminate the backlight illumination to display screen 1 and regulate; If B1>=A, then the backlight illumination difference shown between display screen 1 to be regulated and benchmark display screen can be identified by the human eye, then what need to carry out display screen 1 carries out backlight illumination adjustment, and namely redirect performs step S3, S4 successively.
Step S3: actual luminance difference B corresponding for display screen to be regulated is converted to pulse width modulating signal difference, detect display screen to be regulated corresponding wait adjust pulse width modulating signal value, will treat tune pulse width modulating signal value subtract the adjusted pulse width modulating signal value of pulse width modulating signal difference. For display screen 1 as display screen to be regulated, the actual luminance difference B1 of display screen 1 correspondence is converted to pulse width modulating signal difference, detection display shield 1 correspondence wait adjust pulse width modulating signal value, will treat tune pulse width modulating signal value subtract the adjusted pulse width modulating signal value of pulse width modulating signal difference. Display screen 2, display screen 3 calculate with display screen 1 in the same way simultaneously or successively and obtain corresponding adjustment pulse width modulating signal value.
S4: the backlight module of multiple display screen to be regulated receives and performs corresponding adjustment pulse width modulating signal value. For display screen 1, the backlight module of display screen 1 receives corresponding adjustment pulse width modulating signal value, and perform, make the backlight brightness values of display screen 1 identical with the backlight brightness values of benchmark display screen, or make the actual luminance difference B1 between the backlight brightness values of display screen 1 and the backlight brightness values of benchmark display screen be less than predetermined luminance difference A. Now, the backlight illumination completing display screen 1 regulates. Display screen 2, display screen 3 or regulate successively with display screen 1 in the same way simultaneously.
In above-mentioned regulate process, step S2��S4 computer software programs are expressed as follows:
Lum_min=(lum1, lum2, lum3, lum4)
If(lum1-lum_min>A)
PWM1=PWM1-C* (lum1-lum_min)
else
PWM1=PWM1
If(lum2-lum_min>A)
PWM2=PWM2-C* (lum2-lum_min)
else
PWM2=PWM2
If(lum3-lum_min>A)
PWM3=PWM3-C* (lum3-lum_min)
else
PWM3=PWM3
In above-mentioned formula, C is the gain factor of backlight brightness values and pulse width modulating signal, and this gain factor can be arranged voluntarily according to customer need, and such as, when both are linear relationship, such as pulse width modulating signal=backlight brightness values, then now C value is 1. As brightness and PWM be non-linear relation time, C also can change thereupon.
In aforesaid method, in step S2, it is also possible to the maximum display screen of backlight brightness values as benchmark display screen, other display screens are as display screen to be regulated.
As shown in Figures 2 and 3, the present invention is also provided for the mosaic screen backlight illumination automatic-adjusting device of mosaic screen backlight illumination Automatic adjustment method, with reference to, shown in Fig. 2, mosaic screen to be regulated in the present embodiment is made up of in arranged display screen 1, display screen 2, display screen 3, display screen 4. Mosaic screen backlight illumination automatic-adjusting device comprises: 4 display screens drive module 14,4 brightness detection modules 13,1 brightness processed module, 30,1 luminance difference comparison module 33 and 1 brightness regulation module 40. As shown in Figure 3, brightness processed module 30, luminance difference comparison module 33 and brightness regulation module 40 are realized by software for editing program in a programmable logic device 12. With reference to, shown in Fig. 2 and Fig. 3,4 display screens drive module 14 to be separately positioned on the backlight module of display screen 1, display screen 2, display screen 3 and display screen 4, for driving corresponding backlight module. 4 display screens drive module 14,4 brightness detection modules 13,1 brightness processed module, 30,1 luminance difference comparison module 33 and 1 brightness regulation module 40 to be integrated on a printed circuit board (PCB) 11.
4 brightness detection modules 13 are arranged on the inside light guiding plate of display screen 1, display screen 2, display screen 3 and display screen 4, for detecting the backlight brightness values of 4 display screens. Each brightness detection module 13 is made up of multiple brightness sensor, multiple brightness sensor is separately positioned on the different positions of back light guiding plate, by measuring the brightness value of multiple position, averages as backlight brightness values. Preferably, most brightness sensor settings, in the critical position of the display screen of splicing, mainly obtains the brightness of display screen with position near adjacent display screen.
Brightness processed module 30 connects 4 brightness detection modules 13 respectively, for receiving the backlight brightness values of display screen 1, display screen 2, display screen 3 and display screen 4 that brightness detection module detects and compare the backlight brightness values of display screen 1, display screen 2, display screen 3 and display screen 4, set a benchmark display screen and other three display screens to be regulated, and calculate the actual luminance difference of each display screen to be regulated and benchmark display screen. Concrete, brightness processed module comprises the benchmark screen setting unit 31 being connected and actual luminance difference calculates unit 32. Benchmark screen setting unit 31 is connected with brightness detection module 13 respectively, for receiving the backlight brightness values that each brightness detection module 13 detects, and compares, sets a benchmark display screen and at least one display screen to be regulated. Actual luminance difference calculates the actual luminance difference of unit 32 for calculating between each display screen to be regulated and benchmark display screen.
Luminance difference comparison module 33 is connected between brightness processed module 30 and brightness regulation module 40, wherein it is provided with predetermined luminance difference, the actual luminance difference that each display screen to be regulated that reception brightness processed module 30 calculates is corresponding, actual luminance difference and predetermined luminance difference are compared, and determines whether that the backlight brightness values to display screen to be regulated regulates according to the result compared. The selection of predetermined luminance difference size can the distinguishable minimum luminance difference of reference men and women's eye.
Brightness regulation module 40 connects brightness processed module 30, for receiving the actual luminance difference of display screen to be regulated and benchmark display screen, actual luminance difference corresponding for each display screen to be regulated is converted to pulse width modulating signal difference, calculates adjustment pulse width modulating signal value. 4 display screens drive modules 14 to connect brightness regulation module 40 respectively, for the adjustment pulse width modulating signal that to receive the display screen to be regulated of brightness regulation module 40 calculating corresponding. concrete, brightness regulation module 40 comprises the pulse width modulating signal conversion unit 41 being connected and pulse width modulating signal calculates unit 42. pulse width modulating signal conversion unit 41 and brightness processed module 30 connect, for converting actual luminance difference to pulse width modulating signal difference. pulse width modulating signal calculates unit 42 and 4 display screens drive module 14 to connect, for detect display screen to be regulated corresponding wait adjust pulse width modulating signal value, i.e. detection display screen 1, the waiting of display screen 2 and display screen 3 adjusts pulse width modulating signal value, and will wait to adjust pulse width modulating signal value to subtract the adjusted pulse width modulating signal value of pulse width modulating signal difference, and the display screen that adjustment pulse width modulating signal value is sent to corresponding display screen to be regulated drives module 14, display screen drives module 14 to receive corresponding adjustment pulse width modulating signal value, drive the backlight module of display screen, control the backlight brightness values of display screen to be regulated, make display screen 1, the backlight brightness values of display screen 2 and display screen 3 meets the requirements. pulse width modulating signal conversion unit 41 calculates unit 32, luminance difference comparison module 33 with actual luminance difference respectively, the actual luminance difference that the display screen to be regulated that one side reception actual luminance difference calculating unit 32 calculates is corresponding, one side receives the signal whether carrying out brightness regulation that luminance difference comparison module 33 sends.
The programmable logic device 12 of the present invention is preferably by complicated programmable logic device part or field-programmable gate array.
It should be noted that, brightness processed module 30 and brightness regulation module 40 can adopt other similar components and parts that can realize this process and regulatory function. Brightness processed module 30 and brightness regulation module 40 can also software for editing program realizations on a programmable logic device 12 respectively. Pulse width modulating signal conversion unit 41 and pulse width modulating signal calculate unit 42 and can also realize in a programmable logic device 12 respectively. Display screen in the present embodiment drives module employing but is not limited to adopt LED (photodiode) drive integrated circult. In addition, the brightness processed module in the present invention, brightness regulation module can also be set to multiple.
A kind of mosaic screen, as shown in Figure 4, the mosaic screen of the present embodiment carries out arrangement splicing by display screen 1, display screen 2, display screen 3, display screen 4, display screen 5, display screen 6, display screen 7, display screen 8 according to the mode of matrix. This mosaic screen comprises 2 mosaic screen backlight illumination automatic-adjusting devices, 2 mosaic screen backlight illumination automatic-adjusting device corresponding 4 display screens respectively. Concrete, in 2 mosaic screen backlight illumination automatic-adjusting devices of the present embodiment, one of them is main mosaic screen backlight illumination automatic-adjusting device 100, main mosaic screen backlight illumination automatic-adjusting device 100 is integrated in a printed circuit board on 12, and its correspondence is arranged on the back of display screen 1, display screen 2, display screen 3, display screen 4; Another is from mosaic screen backlight illumination automatic-adjusting device 200, is also integrated in one piece of circuit card from mosaic screen backlight illumination automatic-adjusting device 200, and its correspondence is arranged on the back of display screen 5, display screen 6, display screen 7, display screen 8. It is connected with main mosaic screen backlight illumination automatic-adjusting device 100 from mosaic screen backlight illumination automatic-adjusting device 200 by communication bus 20. Main mosaic screen backlight illumination automatic-adjusting device 100 is the mosaic screen backlight illumination automatic-adjusting device described in previous embodiment; Comprise from mosaic screen backlight illumination automatic-adjusting device 200: 4 brightness being integrated in one piece of circuit card 11-1 detection module 13-1 and 4 display screen drives module 14-1. 4 described brightness detection module 13-1 are separately positioned in mosaic screen display screen 5, on the inside light guiding plate of display screen 6, display screen 7, display screen 8, shield 5 for detection display, the backlight brightness values of display screen 6, display screen 7, display screen 8. 4 display screens drive module 14-1 to be separately positioned in the backlight module of display screen 5, display screen 6, display screen 7, display screen 8. Communication bus 20 is for sending the brightness data detected from the brightness detection module 13-1 in mosaic screen backlight illumination automatic-adjusting device 200 to brightness processed module 30 in main mosaic screen backlight illumination automatic-adjusting device 100, after brightness processed module 30 and brightness regulation module 40 process successively, the data brightness regulation module 40 of main mosaic screen backlight illumination automatic-adjusting device 100 exported are sent to by communication bus 20 and drive module 14-1 from the display screen mosaic screen backlight illumination automatic-adjusting device 200. 4 brightness detection modules 13 are detected that the backlight brightness values that backlight brightness values and 4 brightness detection module 13-1 detect is put together and compare by brightness processed module 30, backlight brightness values lum1, lum2, lum3, lum4, lum5, lum6, lum7, lum8 in display screen 1 to display screen 8 are compared, using minimum for backlight brightness values one as benchmark display screen, other 7 are as display screen to be regulated, and calculate the actual luminance difference that display screen to be regulated is corresponding respectively. Calculate adjustment pulse width modulating signal value corresponding to display screen to be regulated respectively by brightness regulation module 40, and it is sent to accordingly by communication bus 20 and drives module 14-1 from the display screen mosaic screen backlight illumination automatic-adjusting device 200.
The rest may be inferred, when display screen increasing number in mosaic screen, the quantity from mosaic screen backlight illumination automatic-adjusting device 200 can be increased, adopt a communication bus 20 to be connected respectively between mosaic screen backlight illumination automatic-adjusting device 200 with main mosaic screen backlight illumination automatic-adjusting device 100. Meanwhile, in above-described embodiment, it is also possible between adjacent two pieces of display screens, a printed circuit board (PCB) is set.
The foregoing is only the better embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a mosaic screen backlight illumination Automatic adjustment method, it is characterised in that, comprise the following steps:
S1: the backlight brightness values of multiple display screen in detection mosaic screen;
S2: the backlight brightness values of described multiple display screen compared, to set a benchmark display screen and at least one display screen to be regulated; The backlight brightness values that the backlight brightness values of display screen to be regulated described in each in display screen to be regulated described at least one subtracts described benchmark display screen is obtained actual luminance difference corresponding to display screen to be regulated described in each;
S3: actual luminance difference corresponding for described display screen to be regulated is converted to pulse width modulating signal difference; Detect described display screen to be regulated corresponding wait adjust pulse width modulating signal value, will treat tune pulse width modulating signal value subtract the adjusted pulse width modulating signal value of pulse width modulating signal difference;
S4: the backlight module of display screen to be regulated described in each receives corresponding adjustment pulse width modulating signal value, and performs.
2. mosaic screen backlight illumination Automatic adjustment method as claimed in claim 1, it is characterized in that, also comprise step S2-3: set a predetermined luminance difference, by actual luminance difference corresponding for display screen to be regulated described in each respectively compared with predetermined luminance difference, when the actual luminance difference that described display screen to be regulated is corresponding is more than or equal to predetermined luminance difference, perform step S3 and S4, the backlight illumination of this display screen to be regulated is regulated; When the actual luminance difference that described display screen to be regulated is corresponding is less than predetermined luminance difference, the backlight illumination of this display screen to be regulated is not regulated.
3. mosaic screen backlight illumination Automatic adjustment method as claimed in claim 1, it is characterised in that, described step S1 specifically comprises: detect the backlight brightness values of described display screen with the critical part of adjacent display screen.
4. mosaic screen backlight illumination Automatic adjustment method as claimed in claim 3, it is characterized in that, described step S1 specifically comprises: the brightness value detecting the multiple position of back light guiding plate of described display screen, the mean value of brightness value getting multiple position is as backlight brightness values.
5. mosaic screen backlight illumination Automatic adjustment method as claimed in claim 1, it is characterized in that, described step S2 specifically comprises: the backlight brightness values of multiple described display screen compared, minimum for backlight brightness values display screen is set as benchmark display screen, and other display screens are set as display screen to be regulated.
6. a mosaic screen backlight illumination automatic-adjusting device, for regulating the backlight illumination of the display screen of multiple mosaic screen, it is characterised in that, comprising:
Multiple brightness detection module, on the inside light guiding plate that multiple described brightness detection module is separately positioned in mosaic screen multiple display screen, for the backlight brightness values of detection display screen;
Brightness processed module, it connects multiple described brightness detection module, for receiving the backlight brightness values of the multiple described display screen that described brightness detection module detects and compare the backlight brightness values of multiple described display screen, set a benchmark display screen and at least one display screen to be regulated, and calculate the actual luminance difference of display screen to be regulated described in each and benchmark display screen;
Brightness regulation module, it connects brightness processed module, for receiving the actual luminance difference of described display screen to be regulated and benchmark display screen, actual luminance difference corresponding for display screen to be regulated described in each is converted to pulse width modulating signal difference, calculates adjustment pulse width modulating signal value; And
Multiple display screen drives module, is separately positioned in the backlight module of multiple described display screen; Multiple described display screen drives module to connect brightness regulation module respectively, for receiving adjustment pulse width modulating signal corresponding to display screen to be regulated that described brightness regulation module calculates.
7. mosaic screen backlight illumination automatic-adjusting device as claimed in claim 6, it is characterized in that, this device also comprises the luminance difference comparison module being connected between described brightness processed module and brightness regulation module, described luminance difference comparison module is provided with predetermined luminance difference, for receive that described brightness processed module calculates each described in actual luminance difference corresponding to display screen to be regulated, actual luminance difference and predetermined luminance difference are compared, and determines whether that the backlight brightness values to display screen to be regulated regulates according to the result compared.
8. mosaic screen backlight illumination automatic-adjusting device as claimed in claim 6, it is characterised in that, described brightness processed module comprises the benchmark screen setting unit being connected and actual luminance difference calculates unit; Described benchmark screen setting unit is connected with described brightness detection module respectively, for receiving the backlight brightness values that brightness detection module described in each detects, and compares, sets a benchmark display screen and at least one display screen to be regulated; Described actual luminance difference calculates the actual luminance difference of unit for calculating described in each between display screen to be regulated and benchmark display screen.
9. mosaic screen backlight illumination automatic-adjusting device as claimed in claim 6, it is characterised in that, described brightness regulation module comprises the pulse width modulating signal conversion unit being connected and pulse width modulating signal calculates unit; Described pulse width modulating signal conversion unit and described brightness processed model calling, for converting actual luminance difference corresponding for each display screen to be regulated to pulse width modulating signal difference; Described pulse width modulating signal calculates unit and described display screen drives model calling, for detect display screen to be regulated corresponding wait adjust pulse width modulating signal value, and will treat tune pulse width modulating signal value subtract the adjusted pulse width modulating signal value of pulse width modulating signal difference.
10. mosaic screen backlight illumination automatic-adjusting device as described in item as arbitrary in claim 6 to 9, it is characterised in that, described brightness detection module is made up of multiple brightness sensor, and most described brightness sensor settings is in the critical position of the display screen of splicing.
11. mosaic screen backlight illumination automatic-adjusting devices as claimed in claim 10, it is characterised in that, described brightness processed module and brightness regulation module are programmable logic device; Described programmable logic device adopts complicated programmable logic device part or field-programmable gate array.
12. mosaic screen backlight illumination automatic-adjusting devices as claimed in claim 11, it is characterised in that, described display screen drives module to be LED drive integrated circult.
13. mosaic screen backlight illumination automatic-adjusting devices as claimed in claim 12, it is characterized in that, described brightness detection module, brightness processed module, luminance difference comparison module, brightness regulation module and display screen drive module integration on a printed circuit board (PCB).
14. 1 kinds of mosaic screens, it is characterised in that, comprise multiple mosaic screen backlight illumination automatic-adjusting device, the corresponding multiple display screen respectively of mosaic screen backlight illumination automatic-adjusting device described in each; One of them is main mosaic screen backlight illumination automatic-adjusting device, other are from mosaic screen backlight illumination automatic-adjusting device, and each is connected with described main mosaic screen backlight illumination automatic-adjusting device by communication bus respectively from mosaic screen backlight illumination automatic-adjusting device; Described main mosaic screen backlight illumination automatic-adjusting device is the mosaic screen backlight illumination automatic-adjusting device as described in item as arbitrary in claim 6��13; Described comprise from mosaic screen backlight illumination automatic-adjusting device:
Multiple brightness detection module, on the inside light guiding plate that multiple described brightness detection module is separately positioned in mosaic screen multiple display screen, for the backlight brightness values of detection display screen;
Multiple display screen drives module, is separately positioned in the backlight module of multiple described display screen;
Described communication bus is for sending the described brightness data detected from the brightness detection module mosaic screen backlight illumination automatic-adjusting device to brightness processed module in main mosaic screen backlight illumination automatic-adjusting device, after described brightness processed module and brightness regulation module process successively, the data that the brightness regulation module of described main mosaic screen backlight illumination automatic-adjusting device exports are sent to described from the display screen driving module mosaic screen backlight illumination automatic-adjusting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410421830.1A CN104299601B (en) | 2014-08-25 | 2014-08-25 | Mosaic screen backlight illumination Automatic adjustment method and device, mosaic screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410421830.1A CN104299601B (en) | 2014-08-25 | 2014-08-25 | Mosaic screen backlight illumination Automatic adjustment method and device, mosaic screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104299601A CN104299601A (en) | 2015-01-21 |
| CN104299601B true CN104299601B (en) | 2016-06-08 |
Family
ID=52319302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410421830.1A Expired - Fee Related CN104299601B (en) | 2014-08-25 | 2014-08-25 | Mosaic screen backlight illumination Automatic adjustment method and device, mosaic screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104299601B (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3050541B1 (en) * | 2016-04-26 | 2019-07-12 | Valeo Comfort And Driving Assistance | DISPLAY |
| CN106228935B (en) * | 2016-08-19 | 2019-01-22 | 青岛海信电器股份有限公司 | A kind of method and display device keeping LCD screen brightness uniformity |
| KR102581190B1 (en) * | 2016-12-14 | 2023-09-21 | 삼성전자주식회사 | Display apparatus and seam correction method thereof |
| CN106710565A (en) * | 2017-03-30 | 2017-05-24 | 国网福建省电力有限公司 | Correction method for liquid crystal display screen array |
| CN107274819A (en) * | 2017-07-11 | 2017-10-20 | 深圳市华星光电技术有限公司 | The driving method and mosaic screen of a kind of mosaic screen |
| CN107799055B (en) * | 2017-11-13 | 2019-11-05 | 长春希达电子技术有限公司 | A kind of bearing calibration of the LED display based on object of reference |
| CN109994079B (en) * | 2018-01-02 | 2021-02-09 | 深圳市巨烽显示科技有限公司 | Display brightness correction method, device and system |
| CN110390911B (en) * | 2018-04-19 | 2022-03-25 | 中兴通讯股份有限公司 | Display screen backlight brightness control method of electronic equipment and electronic equipment |
| CN108831386B (en) * | 2018-06-27 | 2020-06-30 | 京东方科技集团股份有限公司 | Backlight module and control method thereof, tiled display device and backlight control method thereof, and display module |
| CN109637459A (en) * | 2018-11-26 | 2019-04-16 | 惠州市华星光电技术有限公司 | A kind of backlight back light brightness regulating method |
| CN109739036A (en) * | 2019-02-20 | 2019-05-10 | 惠州市华星光电技术有限公司 | Display, tiled display and the method for correcting tiled display |
| CN109887453A (en) * | 2019-03-15 | 2019-06-14 | Oppo广东移动通信有限公司 | Display control method, device and the electronic equipment of electronic equipment |
| CN109981843B (en) * | 2019-03-15 | 2020-12-08 | Oppo广东移动通信有限公司 | Screen processing method and device of electronic equipment, electronic equipment and storage medium |
| CN110136656A (en) * | 2019-04-24 | 2019-08-16 | 昆山龙腾光电有限公司 | Backlight module and liquid crystal display device |
| CN111326115A (en) * | 2020-03-11 | 2020-06-23 | 武汉华星光电半导体显示技术有限公司 | Display device and method for adjusting brightness of OLED spliced screen |
| CN113936587B (en) * | 2020-06-30 | 2023-04-11 | 京东方科技集团股份有限公司 | Display device and display method thereof |
| CN114241962B (en) * | 2021-12-15 | 2023-12-05 | 威创集团股份有限公司 | COB screen ink color verification method, device, equipment and medium |
| CN117173161B (en) * | 2023-10-30 | 2024-02-23 | 杭州海康威视数字技术股份有限公司 | Content security detection method, device, equipment and system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07236105A (en) * | 1994-02-25 | 1995-09-05 | Hitachi Ltd | Multi-display device and display device |
| JP2004356919A (en) * | 2003-05-29 | 2004-12-16 | Sharp Corp | Projector, program and recording medium |
| CN1972410A (en) * | 2005-11-24 | 2007-05-30 | 捷扬光电股份有限公司 | Adjustment apparatus and method for brightness of TV wall |
| CN101076128A (en) * | 2007-06-05 | 2007-11-21 | 广东威创日新电子有限公司 | Method and apparatus for correcting multi-screen connected wall |
| CN101114440A (en) * | 2007-08-27 | 2008-01-30 | 重庆大学 | Automatic brightness control device of outdoor full color LED big screen display screen and method thereof |
| CN101414437A (en) * | 2007-10-19 | 2009-04-22 | 青岛海信电器股份有限公司 | Liquid crystal display method and liquid crystal display device |
| CN102270445A (en) * | 2010-06-07 | 2011-12-07 | 普雷斯姆股份有限公司 | Neighbourhood brightness matching for uniformity in a tiled display screen |
| CN102750931A (en) * | 2012-07-25 | 2012-10-24 | 广东威创视讯科技股份有限公司 | Method and device for adjusting conformity of spliced wall |
-
2014
- 2014-08-25 CN CN201410421830.1A patent/CN104299601B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07236105A (en) * | 1994-02-25 | 1995-09-05 | Hitachi Ltd | Multi-display device and display device |
| JP2004356919A (en) * | 2003-05-29 | 2004-12-16 | Sharp Corp | Projector, program and recording medium |
| CN1972410A (en) * | 2005-11-24 | 2007-05-30 | 捷扬光电股份有限公司 | Adjustment apparatus and method for brightness of TV wall |
| CN101076128A (en) * | 2007-06-05 | 2007-11-21 | 广东威创日新电子有限公司 | Method and apparatus for correcting multi-screen connected wall |
| CN101114440A (en) * | 2007-08-27 | 2008-01-30 | 重庆大学 | Automatic brightness control device of outdoor full color LED big screen display screen and method thereof |
| CN101414437A (en) * | 2007-10-19 | 2009-04-22 | 青岛海信电器股份有限公司 | Liquid crystal display method and liquid crystal display device |
| CN102270445A (en) * | 2010-06-07 | 2011-12-07 | 普雷斯姆股份有限公司 | Neighbourhood brightness matching for uniformity in a tiled display screen |
| CN102750931A (en) * | 2012-07-25 | 2012-10-24 | 广东威创视讯科技股份有限公司 | Method and device for adjusting conformity of spliced wall |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104299601A (en) | 2015-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104299601B (en) | Mosaic screen backlight illumination Automatic adjustment method and device, mosaic screen | |
| US20160037042A1 (en) | Shooting method and apparatus of electronic device, and electronic device | |
| CN101888486B (en) | Luminance compensation system and luminance compensation method | |
| EP2051234A2 (en) | Display apparatus, quantity-of-light adjusting method for display apparatus and electronic equipment | |
| CN103796380B (en) | Liquid crystal indicator and backlight thereof and light-dimming method | |
| CN105632413A (en) | Backlight regulation method, adjustment device and display device | |
| WO2008142639A1 (en) | An ambience lighting system for a display device and a method of operating such ambience lighting system | |
| CN102376264B (en) | Contrast control device and contrast control method | |
| CN102968964B (en) | Backlight driving method and device, and display device | |
| TW200809753A (en) | Methods and systems for LCD backlight color control | |
| US20110249034A1 (en) | Luminance Control Apparatus and Luminance Control Method | |
| CN103310740B (en) | The image treatment method of display device and display device thereof | |
| CN109905502A (en) | Display panel and the method for realizing its height screen accounting | |
| US9280936B2 (en) | Image display unit, mobile phone and method with image adjustment according to detected ambient light | |
| CN103730102A (en) | Information processing method and electronic equipment | |
| CN102497559A (en) | Picture quality regulation method and system for quick screen matching | |
| CN104183216A (en) | Method and device for controlling brightness of display screen of displayer | |
| CN103366693A (en) | Brightness compensating method and regional light modulating circuit thereof, and liquid crystal display | |
| CN209070960U (en) | A kind of mosaic screen with automatic light sensation regulatory function | |
| CN206649877U (en) | A kind of liquid crystal-spliced screen for realizing brightness uniformity | |
| CN103425441A (en) | Computer and display debug system thereof | |
| CN102800277B (en) | A kind of for regulating method and the display device of display device color and brightness | |
| CN203232682U (en) | Liquid crystal backlight control system and liquid crystal TV | |
| CN109326250A (en) | Electronic equipment, display screen adjusting method | |
| US9105245B2 (en) | Spliced liquid crystal display (SLCD), method for checking the SLCD, and LCD device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20200825 |