CN102184707A - Storage control method for realizing grey display for colorful LED (Light Emitting Diode) display device - Google Patents
Storage control method for realizing grey display for colorful LED (Light Emitting Diode) display device Download PDFInfo
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Abstract
The invention provides a storage control method for realizing grey display for a colorful LED (Light Emitting Diode) display device. Regarding the format of display data required by the colorful LED display device and a 24-bit RGB (Red Green Blue) video source signal, a frame memory is set, and storage space of the frame memory is equally partitioned, and is subjected to read-write control in an alternate manner, so that conversion and grey control from the traditional video source format to the colorful LED display format can be completed by utilizing the frame memory, and the cost is effectively reduced.
Description
Technical field
The present invention relates to store the technical field of control, be specifically related to the storage controlling method that a kind of color LED display device realizes that gray scale shows.
Background technology
The LED display device shows product as information, is widely used in all trades and professions such as security exchange, finance, air station flight.Along with the lifting of LED material technology and technology, the LED display device becomes one of main product of information demonstration with outstanding advantage.The LED display device has its unique data presentation form, with the big screen LED display screen is example, it might not be according to showing as scanning successively from left to right, from top to bottom in the TV, its important difference is that subregion shows simultaneously, be about to LED screen body and be divided into several blocks, each block scans video data simultaneously, has so just determined the video data form of LED display and gray-scale Control must be different from traditional tv.The LED display device is mainly two kinds of built-in gray-scale Control and non-built-in gray-scale Control in the market, the controller partial design of built-in gray-scale Control LED display device is simple, display has partly comprised gray-scale Control, so the display cost is very high, has limited its market utilization.
Summary of the invention
In order to overcome the deficiency that above-mentioned prior art exists, the object of the present invention is to provide a kind of color LED display device to realize the storage controlling method that gray scale shows, by at 24 rgb video source signals and the required format of display data of color LED display device, frame memory is set and divides equally its storage space and read and write control in the mode that replaces, can realize utilizing frame memory to finish conversion and the gray-scale Control of conventional video source format, effectively reduce cost and cause its market utilization wide to the color LED display format.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of color LED display device realizes the storage controlling method that gray scale shows, a frame memory that can hold 2 frames, 24 bit digital rgb signal sources at first is set in the color LED display device, each storage unit of this frame memory is the data width of a pixel, and this frame memory is divided into first branch's frame memory and second branch's frame memory, when first frame time, with each of the present frame video source of first frame time with the power and position data storage to second branch's frame memory, subsequently when second frame time, the color LED display device with each of the present frame video source of second frame time with the power and position data storage to first branch's frame memory, meanwhile with the former frame video source of second frame time of second branch's frame memory through after separating with power and position each with the power and position data, also promptly each method of reading control according to data with the power and position data of the present frame video source of first frame time is read, like this when the K frame time, if in first branch's frame memory be the former frame video source of K frame time through after separating with power and position each with the power and position data, also promptly each of the present frame video source of K-1 frame time with the power and position data, the color LED display device with each of the present frame video source of K frame time with the power and position data storage to second branch's frame memory, meanwhile with the former frame video source of the K frame time of first branch's frame memory through after separating with power and position each with the power and position data, also promptly each method of reading control according to data with the power and position data of the present frame video source of K-1 frame time is read, if in second branch's frame memory be the former frame video source of K frame time through after separating with power and position each with the power and position data, also promptly each of the present frame video source of K-1 frame time with the power and position data, the color LED display device with each of the present frame video source of K frame time with the power and position data storage to first branch's frame memory, meanwhile with the former frame video source of the K frame time of second branch's frame memory through after separating with power and position each with the power and position data, also promptly each method of reading control according to data with the power and position data of the present frame video source of K-1 frame time is read, and wherein K is the integer more than or equal to 2.
Described first branch's frame memory and second branch's frame memory are divided into 8 parts respectively, and the capacity of each part of 8 parts is at least the storage unit of total pixel 1/8 of incoming frame video source.
With each address setting with the power and position data of storage of each part in described 8 parts is partly corresponding separately location, same power and position place, in the location, same power and position place of each part, be divided into corresponding row address according to input video source longitudinal frame, and in the row address of the field of each part, be divided into corresponding column address according to input video source lateral resolution, like this when storing each with the power and position data, each has limit priority with location, power and position place, inferior priority is the corresponding column address of current line in each part, is the field row address in each part at last.
The method that described data are read control is included in the K frame time interval, after the former frame video source process of K frame time will being separated with power and position each read 19 times with the power and position data amount, be about to each with first in the power and position data with the power and position data, second with the power and position data, the 3rd with the power and position data, respectively read 1 time with the power and position data with power and position data and the 5th for the 4th, and its 6th is read 2 times with the power and position data, read 4 times and the 8th with the power and position data for the 7th and read eight times with the power and position data, wherein K is the integer more than or equal to 2.
Described each have the highest priority of reading with every in the power and position data the order of reading for the regional address data with the power and position data, next reads the column data in the current line that priority is respective area, reads priority at last and be the line data in the respective area.
Described each with every in the power and position data with the power and position data when reading by controlling its each demonstration time with power and position dutycycle control mode with power and position in conjunction with each, causing each demonstration time with the high data bit of power and position is 2 times that adjacent time high data bit shows the time.
By at 24 rgb video source signals and the required format of display data of color LED display device, frame memory is set and divides equally its storage space and read and write control, can realize utilizing frame memory to finish conversion and the gray-scale Control of conventional video source format to the color LED display format in the mode that replaces.By repeatedly dividing equally the storage space of frame memory, rationally arrange video source data in addition, made full use of the storage resources of storer.Do not need to pass through complicated logic circuits, only by with video source data according to the storage of the method for the invention with read, just can realize conversion and the gray-scale Control of 24 rgb signals to color LED video data form, saved the hardware resource of realizing controller, effectively reduced cost and cause its market utilization wide.
Embodiment
The present invention will be described in more detail below in conjunction with embodiment.
The color LED display device realizes the storage controlling method that gray scale shows, a frame memory that can hold 2 frames, 24 bit digital rgb signal sources at first is set in the color LED display device, each storage unit of this frame memory is the data width of a pixel, and this frame memory is divided into first branch's frame memory and second branch's frame memory, when first frame time, with each of the present frame video source of first frame time with the power and position data storage to second branch's frame memory, subsequently when second frame time, the color LED display device with each of the present frame video source of second frame time with the power and position data storage to first branch's frame memory, meanwhile with the former frame video source of second frame time of second branch's frame memory through after separating with power and position each with the power and position data, also promptly each method of reading control according to data with the power and position data of the present frame video source of first frame time is read, like this when the K frame time, if in first branch's frame memory be the former frame video source of K frame time through after separating with power and position each with the power and position data, also promptly each of the present frame video source of K-1 frame time with the power and position data, the color LED display device with each of the present frame video source of K frame time with the power and position data storage to second branch's frame memory, meanwhile with the former frame video source of the K frame time of first branch's frame memory through after separating with power and position each with the power and position data, also promptly each method of reading control according to data with the power and position data of the present frame video source of K-1 frame time is read, if in second branch's frame memory be the former frame video source of K frame time through after separating with power and position each with the power and position data, also promptly each of the present frame video source of K-1 frame time with the power and position data, the color LED display device with each of the present frame video source of K frame time with the power and position data storage to first branch's frame memory, meanwhile with the former frame video source of the K frame time of second branch's frame memory through after separating with power and position each with the power and position data, also promptly each method of reading control according to data with the power and position data of the present frame video source of K-1 frame time is read, and wherein K is the integer more than or equal to 2.Described first branch's frame memory and second branch's frame memory are divided into 8 parts respectively, and the capacity of each part of 8 parts is at least the storage unit of total pixel 1/8 of its inner frame video source.With each address setting with the power and position data of storage of each part in described 8 parts is partly corresponding separately location, same power and position place, in the location, same power and position place of each part, be divided into corresponding row address according to input video source longitudinal frame, and in the row address of the field of each part, be divided into corresponding column address according to input video source lateral resolution, like this when storing each with the power and position data, each has limit priority with location, power and position place, inferior priority is the corresponding column address of current line in each part, is the field row address in each part at last.The method that described data are read control is included in the K frame time interval, after the former frame video source process of K frame time will being separated with power and position each read 19 times with the power and position data amount, be about to each with first in the power and position data with the power and position data, second with the power and position data, the 3rd with the power and position data, respectively read 1 time with the power and position data with power and position data and the 5th for the 4th, and its 6th is read 2 times with the power and position data, read 4 times and the 8th with the power and position data for the 7th and read eight times with the power and position data, wherein K is the integer more than or equal to 2.Because the color LED display device has each subregion characteristics of video data simultaneously, described each have the highest priority of reading with every in the power and position data the order of reading for the regional address data with the power and position data, next reads the column data in the current line that priority is respective area, reads priority at last and be the line data in the respective area.Described each with every in the power and position data with the power and position data when reading by controlling its each demonstration time with power and position dutycycle control mode with power and position in conjunction with each, causing each demonstration time with the high data bit of power and position is that adjacent high data bit shows 2 times of the time, thereby has realized the gray-scale Control of color LED display device.
By at 24 rgb video source signals and the required format of display data of color LED display device, frame memory is set and divides equally its storage space and read and write control, can realize utilizing frame memory to finish conversion and the gray-scale Control of conventional video source format to the color LED display format in the mode that replaces.By repeatedly dividing equally the storage space of frame memory, rationally arrange video source data in addition, made full use of the storage resources of storer.Do not need to pass through complicated logic circuits, only by with video source data according to the storage of the method for the invention with read, just can realize conversion and the gray-scale Control of 24 rgb signals to color LED video data form, saved the hardware resource of realizing controller, effectively reduced cost and cause its market utilization wide.
Claims (6)
1. a color LED display device realizes the storage controlling method that gray scale shows, it is characterized in that: a frame memory that can hold 2 frames, 24 bit digital rgb signal sources at first is set in the color LED display device, each storage unit of this frame memory is the data width of a pixel, and this frame memory is divided into first branch's frame memory and second branch's frame memory, when first frame time, with each of the present frame video source of first frame time with the power and position data storage to second branch's frame memory, subsequently when second frame time, the color LED display device with each of the present frame video source of second frame time with the power and position data storage to first branch's frame memory, meanwhile with the former frame video source of second frame time of second branch's frame memory through after separating with power and position each with the power and position data, also promptly each method of reading control according to data with the power and position data of the present frame video source of first frame time is read, like this when the K frame time, if in first branch's frame memory be the former frame video source of K frame time through after separating with power and position each with the power and position data, also promptly each of the present frame video source of K-1 frame time with the power and position data, the color LED display device with each of the present frame video source of K frame time with the power and position data storage to second branch's frame memory, meanwhile with the former frame video source of the K frame time of first branch's frame memory through after separating with power and position each with the power and position data, also promptly each method of reading control according to data with the power and position data of the present frame video source of K-1 frame time is read, if in second branch's frame memory be the former frame video source of K frame time through after separating with power and position each with the power and position data, also promptly each of the present frame video source of K-1 frame time with the power and position data, the color LED display device with each of the present frame video source of K frame time with the power and position data storage to first branch's frame memory, meanwhile with the former frame video source of the K frame time of second branch's frame memory through after separating with power and position each with the power and position data, also promptly each method of reading control according to data with the power and position data of the present frame video source of K-1 frame time is read, and wherein K is the integer more than or equal to 2.
2. color LED display device according to claim 1 realizes the storage controlling method that gray scale shows, it is characterized in that: first branch's frame memory and second branch's frame memory are divided into 8 parts respectively, and the capacity of each part of 8 parts is at least the storage unit of total pixel 1/8 of its inner frame video source.
3. color LED display device according to claim 2 realizes the storage controlling method that gray scale shows, it is characterized in that: each address setting with the power and position data of storage of each part in described 8 parts is partly corresponding separately location, same power and position place, in the location, same power and position place of each part, be divided into corresponding row address according to input video source longitudinal frame, and in the row address of the field of each part, be divided into corresponding column address according to input video source lateral resolution, like this when storing each with the power and position data, each has limit priority with location, power and position place, inferior priority is the corresponding column address of current line in each part, is the field row address in each part at last.
4. realize the storage controlling method that gray scale shows according to claim 1 or the described color LED display device of claim 2, it is characterized in that: the method that described data are read control is included in the K frame time interval, the former frame video source of the K frame time of former frame to be read 19 times with the power and position data amount through after separating with power and position each, be about to each with first in the power and position data with the power and position data, second with the power and position data, the 3rd with the power and position data, respectively read 1 time with the power and position data with power and position data and the 5th for the 4th, and its 6th is read 2 times with the power and position data, read 4 times and the 8th with the power and position data for the 7th and read eight times with the power and position data, wherein K is the integer more than or equal to 2.
5. realize the storage controlling method that gray scale shows according to claim 1 or the described color LED display device of claim 2, it is characterized in that: described each with every in the power and position data with the power and position data when reading by controlling its each demonstration time with power and position dutycycle control mode with power and position in conjunction with each, causing each demonstration time with the high data bit of power and position is 2 times that adjacent time high data bit shows the time.
6. realize the storage controlling method that gray scale shows according to claim 1 or the described color LED display device of claim 2, it is characterized in that: described each have the highest priority of reading with every in the power and position data the order of reading for the regional address data with the power and position data, next reads the district's column data in the current line that priority is respective area, reads priority at last and be the district's line data in the respective area.
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Application publication date: 20110914 |