CN101635130A - System and method for adjusting brightness point by point - Google Patents
System and method for adjusting brightness point by point Download PDFInfo
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Abstract
The invention relates to a system and a method for adjusting brightness point by point. The system comprises a host computer, an online controller, a scanning controller, an LED case, a camera and a light quantity measuring instrument. The method for the system for adjusting the brightness point by point to adjust the brightness and the uniformity comprises the following steps: A, lightening the LED case, performing calculation, and placing well the positions of the camera and the light quantity measuring instrument; B, controlling the camera by the host computer to take pictures of the LED case automatically, and adjusting the brightness uniformity of lamp points on the LED case; and C, controlling the light quantity measuring tool by the host computer to measure the overall brightness of the LED case automatically, and adjusting the brightness of the lamp points on the LED case. By using the system and the method, firstly, the one-time acquisition of the brightness of the lamp points on the LED case is achieved, and the data is accurate; and secondly, by adopting the system, the operation is simple and fully automatic, the effect of the LED lamp points is obvious after the adjustment and is presented immediately.
Description
Technical field
The invention belongs to image and show the adjustment technology field, particularly a kind of LED is shown carried out system architecture and the implementation method that brightness point by point is adjusted.
Background technology
The LED screen is by hundreds of thousands and even semiconductor light-emitting-diode up to a million, that is: LED lamp point combines.All factors such as block according to inconsistent, the dust of lamp point of the optical characteristics difference of lamp point, component ageing, driving error, the angle of lamp point own, the shade of guard lamp point and all can cause the inhomogeneous of screen lamp point brightness.Solve at present the main path of this non-uniform phenomenon: the one, improve the consistance that LED light is learned characteristic, the 2nd, improve the homogeneity of display screen by the mode of proofreading and correct.The coherence method that improves LED light characteristic is to change screen, and this not only needs a large amount of manpowers, and the time also has substantial contribution.And the correcting mode of screen intensity is to utilize the luminance meter that each LED lamp point is measured, obtain the brightness value of each LED lamp point, by calculating, obtain adjusted value then, by control circuits such as electric currents LED lamp point is adjusted again, reached the homogeneous value of appointment.Like this need to each the point carry out value one by one, operate loaded down with trivial details, system complex, overlong time, manually-operated is too much, precision is low, inefficiency.
China's application number is: 200710076632.6 invention, its name is called: a kind of lightness data obtaining method of the LED of being used for gamma correction and equipment thereof, this application discloses method and the equipment thereof that a kind of LED proofreaies and correct, wherein adopting the mode of proofreading and correct is the current-modulation mode, the shortcoming of current-modulation mode is: the one, and the variation of drive current and brightness is not a proportional relation, adjusts electric current along with the variation of brightness is difficult to accurate control; The 2nd, the parameter difference of variety classes LED lamp plate, drive current is also different with the relation curve of brightness, all will calculate again at every turn; The 3rd, the change of drive current can cause the variation of colourity, so colourity is changed when changing Current Regulation brightness, after the adjustment, can cause the difference of colourity when screen intensity changes like this, makes image chroma deviation occur.
In sum, adjust the field, press for a kind of not only practical but also economic method and solve the inhomogeneity problem of screen intensity in the LED brightness of image.
Summary of the invention
The embodiment of the invention provides a kind of system and method for brightness point by point adjustment especially in order to solve deficiency of the prior art, and utilizing this system and method one is to realize that data are accurate to the disposable collection of LED casing lamp point brightness; The 2nd, adopt this system operation simple, full-automatic operation, and adjusted LED lamp point effect is obvious, presents immediately.
According to the embodiment of the invention, the system that provides a kind of brightness point by point to adjust, this system architecture comprises: display system and Adjustment System, its display system comprises:
Be provided with the main frame of LED management tool module, be used to transmit vision signal and control signal to online controller, by described LED management tool module controls LED casing;
Online controller is used to receive described vision signal and described control signal, handles described vision signal according to described control signal, obtains video data, sends to scanning monitor;
Be provided with the scanning monitor of memory module, be used to receive described video data,, handle described video data, generate video data, send to the LED casing according to the LED cabinet configuration file of described memory module;
The LED casing is connected with described scanning monitor, receives described video data, shows;
This system architecture also comprises Adjustment System, and Adjustment System comprises:
Described main frame also is used to transmit, receive and handle the brightness data of image of camera data and luminance meter, adjusts the brightness and the homogeneity of LED casing lamp point according to described view data and described brightness data;
Camera, the brightness that is used to obtain LED casing lamp point sends described view data to described main frame;
The luminance meter is used to measure the overall brightness of LED casing, sends described brightness data to described main frame.
Described main frame is provided with control module, is used for sending control signals to respectively described camera and described luminance meter, and receives the brightness data that view data that camera passes back and luminance meter are passed back.
Described main frame is provided with sending module, is used for described brightness data is directly sent to described scanning monitor.
Described main frame set handling module is used to handle described view data, generates form and adjusts file, sends to described scanning monitor by described main frame.
Described scanning monitor is used for that also described form is adjusted file and is saved in described memory module, adjusts file according to described LED cabinet configuration file and described form, handles described video data, generates video data, sends to described LED casing.
Described main frame also is used for by described LED management tool module object brightness being sent to described scanning monitor.
Described scanning monitor is used for that also described brightness data directly is saved in described form and adjusts file, and according to described object brightness, calculates with described brightness data, generates video data and is sent to described LED casing.
Described scanning monitor adopts pulse width modulation mode.
Described camera is vertically installed in the place ahead of described LED casing, and its distance with described LED casing both sides equates, and described camera is no more than 3 degree to the distance and the angle of described camera to the vertical range of described LED casing of described LED casing both sides.
Described luminance meter is vertically installed in the place ahead of described LED casing, its distance with described LED casing both sides equates, described luminance meter is no more than 3 degree to the distance and the angle of described luminance meter to the vertical range of described LED casing of described LED casing both sides; And described luminance meter is arranged at the dead astern of camera.
Described system carries out the method for brightness and homogeneity adjustment, carries out according to the following steps:
A, light the LED casing, calculate and put the position of camera and luminance meter;
B, automatically described LED casing is taken pictures, obtain view data and send to first main frame, handle, the lamp point of described LED casing is carried out the adjustment of brightness homogeneity by scanning monitor by online controller by the second host computer control camera;
C, automatically the overall brightness of described LED casing is measured by the described second host computer control luminance meter, obtain brightness data and send to described first main frame by online controller, handle by scanning monitor, the lamp point of described LED casing is carried out the brightness adjustment.
The system and method that adopts a kind of brightness point by point of the present invention to adjust, can obtain following beneficial effect:
1, realize disposable lamp point brightness collection, data are accurate; Need not each LED casing lamp point is measured one by one, only need the LED casing is taken pictures.By the mode of the LED casing being taken pictures with camera or luminance meter, all lamp points are carried out disposable taking pictures, realization is carried out value to the brightness of each the LED lamp point on the picture, institute's brightness value that obtains is accurate, and with the computing method of science, calculate the vertical range between camera and screen, well solved the visual angle and caused the uneven problem of observing.
2, simple to operate, automation operating system; Need not to change the original structure of system, only need to connect on the computing machine survey instrument and get final product.Need not complicated manually-operated, take pictures and get brightness value, handle picture, generate and adjust data, the homogenization adjustment, the brightness adjustment, these all are to be finished automatically by system.Obtain brightness value from taking pictures, finish to adjusting, whole adjustment process is finished automatically, short, high efficiency of time, and can be as the adjustment of production line.
3, adjusted homogenization effect is obvious, presents immediately; Effect after adjustment finishes is obvious, and no matter detecting from naked eyes and data can both conformance with standard, and adjusts and present adjusted effect immediately after finishing.
4, on the basis that does not change existing display system, increased Adjustment System, be used for the brightness of LED casing lamp point and the disposable adjustment of homogeneity, cost is lower, and efficient increases, and is convenient to accepting extensively of user.
5, the present invention adopts pulse width modulation mode, and its advantage is that width modulation does not change drive current, and the constant current chip can not cause the variation of colourity.Under identical electric current, pwm pulse was directly proportional with the switch conduction time, made that adjustment is more accurate.
Description of drawings
Fig. 1 is a display system architectures synoptic diagram of the present invention;
Fig. 2 is an Adjustment System structural representation of the present invention;
Fig. 3 is a system architecture synoptic diagram of the present invention;
Fig. 4 is a camera putting position synoptic diagram of the present invention;
Fig. 5 is a camera putting position computing formula synoptic diagram of the present invention.
Among the figure: 101, main frame; 102, online controller; 103 scanning monitors; 104, LED casing; 105, camera; 106, luminance meter; 201, lamp point; 202, camera is to the distance and the angle of camera to the vertical range of LED casing of LED casing both sides; 301, user's input.
Embodiment
Below by the drawings and the specific embodiments the present invention is described in further details.
Embodiment 1
With reference to accompanying drawing Fig. 1 and Fig. 3, its display system comprises: be provided with the main frame 101 of LED management tool module, be used for transmitting vision signal and control signal to online controller 102, by described LED management tool module controls LED casing 104; Online controller 102 is used to receive described vision signal and described control signal, handles described vision signal according to described control signal, obtains video data, sends in the scanning monitor 103; Be provided with the scanning monitor 103 of memory module, be used to receive described video data,, handle described video data, generate video data, send in the LED casing 104 according to the configuration file of the LED casing 104 of described memory module; LED casing 104 is connected with described scanning monitor 103, receives described video data, shows.
It wants content displayed the input media input 301 of user by the outside, main frame 101 is imported the user to handle and is formed the DVI vision signal, send in the online controller 102,102 pairs of DVI vision signals of online controller are handled the back and are generated 100,000,000 transmission signals, send in the scanning monitor 103,100,000,000 transmission signals that scanning monitor 103 will receive, configuration file according to the LED casing of storing is handled data, generate video data, send in the LED casing in 104, LED casing 104 shows accordingly according to the video data that receives.
Embodiment 2
With reference to accompanying drawing Fig. 2 and Fig. 3, wherein Adjustment System comprises: described main frame 101, also be used to transmit, receive and handle the view data of camera 105 and the brightness data of luminance meter 106, according to the brightness and the homogeneity of described view data and described brightness data adjustment LED casing 104 lamp points; Described main frame 101 can the set handling module be finished transmission, reception and the processing capacity of data, also delivery module, receiver module and processing module can be set respectively, finishes transmission, reception and processing capacity respectively.
Embodiment 3
With reference to accompanying drawing Fig. 4 and Fig. 5, before the native system operation, should set up environment, build system.After at first LED casing 104 being placed into the camera site of appointment, light LED casing 104.
The position of calculating and having put camera 105 and luminance meter 106, camera 105 is no more than 3 degree to the distance and the angle of camera 105 to the vertical range of LED casing 104 of LED casing 104 both sides.Be the dead ahead that camera 105 is placed in LED casing 104, and on the horizontal axis of LED casing 104, camera 105 forms an isoceles triangle shape to the distance of LED casing 104 both sides with LED casing 104, the angle of two waists is smaller or equal to 6 degree.
The calculating of distance: R is the radius of LED casing, and L is the vertical range of camera to the LED casing, and a is the distance and camera angle to the vertical range of casing of camera to the casing both sides.
L=R/tan (a) and a=＜3 degree
L＞＝R/tan(3)
L＞＝R/(0.05)
Example: diameter is 1 meter a screen, asks the distance L of camera and screen.
L＞＝0.5/(0.05)
L＞=10 meter
Luminance meter 106:, luminance meter 106 is placed into the dead astern normal to screen of camera 105 with the placement of camera 105.Same, luminance meter 106 is placed in the dead ahead of LED casing 104, and on the horizontal axis of LED casing 104, and is placed on the rear of camera 105, luminance meter 106 forms an isoceles triangle shape to the distance of LED casing 104 both sides with LED casing 104, and the angle of two waists is smaller or equal to 6 degree.
Embodiment 4
With reference to accompanying drawing Fig. 3, Fig. 4 and Fig. 5, the system that a kind of brightness point by point is adjusted obtains the method that brightness and homogeneity are adjusted, and described method is carried out according to the following steps:
A, set up environment, build system, light LED casing 104, calculate and put the position of camera 105 and luminance meter 106;
B, automatically LED casing 104 is taken pictures by main frame 101 control cameras 105, and the respective handling by main frame 101 and scanning monitor 103, carry out the brightness homogeneity adjustment of LED casing 104 lamp points;
C, automatically the overall brightness of LED casing 104 is measured, and passed through the respective handling of main frame 101 and scanning monitor 103, carry out the brightness adjustment of LED casing 104 lamp points by main frame 101 control luminance meters 106;
D, adjustment finish, Print Label numbering packaged LED casing 104.
All the other principles of present embodiment are identical with the 1st, 2 and 3 embodiment, do not repeat them here.
By above embodiment the present invention has been carried out further announcement, but scope of the present invention is not limited thereto, under the condition that does not depart from the present invention's design, more than each element can replace with the similar or equivalent element that affiliated technical field personnel understand.
Claims (10)
1, a kind of system of brightness point by point adjustment, its display system comprises:
Be provided with the main frame of LED management tool module, be used to transmit vision signal and control signal to online controller, by described LED management tool module controls LED casing;
Online controller is used to receive described vision signal and described control signal, handles described vision signal according to described control signal, obtains video data, sends to scanning monitor;
Be provided with the scanning monitor of memory module, be used to receive described video data,, handle described video data, generate video data, send to the LED casing according to the LED cabinet configuration file of described memory module;
The LED casing is connected with described scanning monitor, receives described video data, shows;
This system architecture also comprises Adjustment System, and Adjustment System comprises:
Described main frame also is used to transmit, receive and handle the brightness data of image of camera data and luminance meter, adjusts the brightness and the homogeneity of LED casing lamp point according to described view data and described brightness data;
Camera, the brightness that is used to obtain LED casing lamp point sends described view data to described main frame;
The luminance meter is used to measure the overall brightness of LED casing, sends described brightness data to described main frame.
2, system according to claim 1 is characterized in that, described main frame is provided with control module, is used for sending control signals to respectively described camera and described luminance meter, and receives the brightness data that view data that camera passes back and luminance meter are passed back.
3, system according to claim 1 is characterized in that, described main frame is provided with sending module, is used for described brightness data is directly sent to described scanning monitor.
4, system according to claim 1 is characterized in that, described main frame set handling module is used to handle described view data, generates form and adjusts file, sends to described scanning monitor by described main frame.
5, system according to claim 4, it is characterized in that, described scanning monitor is used for that also described form is adjusted file and is saved in described memory module, adjust file according to described LED cabinet configuration file and described form, handle described video data, generate video data, send to described LED casing.
6, system according to claim 5 is characterized in that, described main frame also is used for by described LED management tool module object brightness being sent to described scanning monitor;
Described scanning monitor is used for that also described brightness data directly is saved in described form and adjusts file, and according to described object brightness, calculates with described brightness data, generates video data and is sent to described LED casing.
According to claim 1,5 or 6 arbitrary described systems, it is characterized in that 7, described scanning monitor adopts pulse width modulation mode.
8, system according to claim 1, it is characterized in that, described camera is vertically installed in the place ahead of described LED casing, its distance with described LED casing both sides equates, and, described camera is no more than 3 degree to the distance and the angle of described camera to the vertical range of described LED casing of described LED casing both sides.
9, system according to claim 1, it is characterized in that, described luminance meter is vertically installed in the place ahead of described LED casing, its distance with described LED casing both sides equates, described luminance meter is no more than 3 degree to the distance and the angle of described luminance meter to the vertical range of described LED casing of described LED casing both sides; And described luminance meter is arranged at the dead astern of camera.
10, a kind of system according to claim 1 carries out the method for brightness and homogeneity adjustment, it is characterized in that described method is carried out according to the following steps:
A, light the LED casing, calculate and put the position of camera and luminance meter;
B, automatically described LED casing is taken pictures, obtain view data and send to first main frame, handle, the lamp point of described LED casing is carried out the adjustment of brightness homogeneity by scanning monitor by online controller by the second host computer control camera;
C, automatically the overall brightness of described LED casing is measured by the described second host computer control luminance meter, obtain brightness data and send to described first main frame by online controller, handle by scanning monitor, the lamp point of described LED casing is carried out the brightness adjustment.
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