CN103854608B - LED display unit, LED display and LED display system - Google Patents
LED display unit, LED display and LED display system Download PDFInfo
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- CN103854608B CN103854608B CN201310631646.5A CN201310631646A CN103854608B CN 103854608 B CN103854608 B CN 103854608B CN 201310631646 A CN201310631646 A CN 201310631646A CN 103854608 B CN103854608 B CN 103854608B
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Abstract
A kind of LED display unit of present invention offer, LED display and LED display system.In the case where not making system structure complicate, expeditiously display has the image of more chromatic numbers for it.It includes：LED display units（200）, have multiple pixels（210）, which includes the different more than two LED illumination regions of illuminant colour；Carry out LED display units（200）LED illumination regions light emitting control driving portion（310、320、330）；Storage is respectively in LED display units（200）The image data of display（DI）Two image data memories（410、420）；It is entered the image data input unit of image data DI（510）；And control unit（600）, enable two image data memory cells（410、420）Any one for write-in come from image data input unit（510）Image data（DI）Input pattern, and enable two image data memories（410、420）Another for image data can be read（DI）Output mode.
Description
Technical field
The present invention relates to LED display unit, LED display and LED display systems.
Background technology
In including the LED display unit for the LED display units being made of the multiple LED chips being arranged in a matrix, with number
The form of word serial signal is from PC（Hereinafter referred to as PC）It is suggested Deng the scheme for sending image data（For example, patent is literary
Offer 1）.In this configuration, above-mentioned PC generates the digital gray scale grade by being respectively provided with such as RGB from the image that should be shown
The digital image data that multiple pixels are constituted.The digital image data is shown in the form of data serial signal to above-mentioned LED single
Member is sent.As a result, for example compared with the structure for sending image data by analog form, shakiness when signal transmission can be reduced
Determine factor, improves display quality.
But for the timing that the image in above-mentioned LED display unit is shown, preferably from being judged as YES in above-mentioned PC
Start substantially with real-time display from the time of the timing that should be shown.Such as shown in above-mentioned LED display unit image according to when
Between sequence variation so-called normal image in the case of, it is necessary to the figure of the degree of smooth image can be identified as according to observer
Picture frequency rate sends above-mentioned image data.In a cycle of the picture frequency, force to carry out following processing：It is aobvious in above-mentioned LED
Show the processing that the image data from above-mentioned PC is received in unit；Clock signal according to regulation etc. controls signal according to each picture
Element keeps the processing of above-mentioned image data；Such as instruction is sent out to driving portion, the control that shines is carried out to above-mentioned LED chip as a result,
The processing of system.Thus, for example, it is necessary to shorten the delivery time of image data, it is desirable that pass through more lines（Cable）Send above-mentioned figure
As the scheme of data etc..Even alternatively, the less text importing of variation of the time serieses such as destination display panel of electric car,
Generally also using scrolling display word method, carry out with needing higher speed above-mentioned image data reception and processing with it is above-mentioned
The light emitting control of LED chip.Require it with delicate Neutral colour etc. especially as the display color in above-mentioned LED display unit
In the case of, the conveying capacity of above-mentioned image data is easy to become huge.
Existing technical literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2000-293119 bulletins
Invention content
The technical problems to be solved by the invention
The present invention accordingly contemplates, and technical problem is, providing one kind not making system structure
In the case of complication, expeditiously LED display unit, LED display and the LED of image of the display with more chromatic numbers are aobvious
Show system.
Technological means for solving technical problem
The LED display unit that the first aspect of the present invention is provided, which is characterized in that including：LED display units, have
Multiple pixels, the pixel include the different more than two LED illumination regions of illuminant colour；It is aobvious to carry out above-mentioned LED for driving portion
Show the light emitting control of the above-mentioned LED illumination regions in portion；Two image data memory cells store respectively in above-mentioned LED display units
The image data of display；Image data input unit is entered above-mentioned image data；And control unit, enable above-mentioned two image
Any one of data storage cell is the input pattern of above-mentioned image data of the write-in from above-mentioned image data input unit, and
Enable above-mentioned two image data memory cell（Another）For the output mode of above-mentioned image data can be read.
In the preferred embodiments of the present invention, above-mentioned multiple pixels are arranged in a matrix.
In the preferred embodiments of the present invention, above-mentioned pixel includes at least three above-mentioned LED illumination regions.
In the preferred embodiments of the present invention, above-mentioned at least three LED illumination regions include：The LED of burn red is sent out
Light portion, the LED illumination regions of glow green and the coloured light that turns blue LED illumination regions.
In the preferred embodiments of the present invention, at least one of above three LED illumination regions includes more than two
LED chip.
In the preferred embodiments of the present invention, above-mentioned image data includes by more bits relative to above-mentioned each pixel
The light-emitting data of composition.
In the preferred embodiments of the present invention, further include：Multiple display color numbers are made to be compiled with multiple instruction palettes
Number corresponding display color alignment processing portion, multiple display colors numbers are respectively relative to above-mentioned driving portion with above-mentioned each pixel
The defined light emission luminance of above-mentioned each LED illumination regions, multiple instruction palette numbers are included in above-mentioned image data, above-mentioned
The quantity of multiple instruction palette numbers is fewer than the quantity of above-mentioned multiple display color numbers.
In the preferred embodiments of the present invention, above-mentioned multiple instruction palette numbers shine according to above-mentioned each LED
Each of portion is made of 1 bit.
In the preferred embodiments of the present invention, above-mentioned multiple instruction palette numbers, according to above-mentioned LED illumination regions
Each, by more than 3 bits constituting.
In the preferred embodiments of the present invention, above-mentioned multiple display color numbers shine every according to above-mentioned each LED
It one, is made of 8 bits.
The LED display unit that the second aspect of the present invention is provided, including the first aspect of the present invention provided it is multiple
LED display unit, above-mentioned each LED display have above-mentioned image data of the output from above-mentioned image data input unit
Image data output section, above-mentioned multiple LED displays are using cascade（Tandem, cascade）Connection.
In the preferred embodiments of the present invention, the input and output of above-mentioned image data, with the clock of 5MHz~10MHz
Frequency carries out.
In the preferred embodiments of the present invention, the above-mentioned image data input unit of adjacent above-mentioned LED display unit
It is connect with above-mentioned image data output section.
In the preferred embodiments of the present invention, above-mentioned multiple LED display units include：Above-mentioned pixel only includes（Tool
It is standby）The display unit of two above-mentioned LED illumination regions.
In the preferred embodiments of the present invention, the above-mentioned pixel in above-mentioned multiple LED display units only includes two
The display unit of above-mentioned LED illumination regions is only connected with two in above-mentioned image data input unit and above-mentioned image data output section
Image data line（Cable, cable）.
In the preferred embodiments of the present invention, above-mentioned multiple LED display units include：Above-mentioned pixel only includes（Tool
It is standby）The display unit of three above-mentioned LED illumination regions.
In the preferred embodiments of the present invention, the above-mentioned pixel in above-mentioned multiple LED display units only includes three
The display unit of above-mentioned LED illumination regions is only connected with three in above-mentioned image data input unit and above-mentioned image data output section
Image data line.
In the preferred embodiments of the present invention, above-mentioned multiple LED display units include：Above-mentioned pixel only includes two
The display unit of above-mentioned LED illumination regions and above-mentioned pixel only include the display unit of three above-mentioned LED illumination regions.
In the preferred embodiments of the present invention, the above-mentioned image data that is shown in above-mentioned multiple LED display units
All be input to above-mentioned pixel only and include in the above-mentioned LED display unit of two above-mentioned LED illumination regions only on any one
State image data input unit.
In the preferred embodiments of the present invention, the above-mentioned pixel in above-mentioned multiple LED display units only includes three
The display unit of above-mentioned LED illumination regions has the return wire being connect with above-mentioned image data output section and above-mentioned image input unit.
In the preferred embodiments of the present invention, the above-mentioned pixel in above-mentioned multiple LED display units only includes three
The above-mentioned pixel of the display unit of above-mentioned LED illumination regions, including three above-mentioned LED illumination regions.
In the preferred embodiments of the present invention, above-mentioned only three above-mentioned LED illumination regions include：Burn red
The LED illumination regions of LED illumination regions, the LED illumination regions of glow green and the coloured light that turns blue.
In the preferred embodiments of the present invention, only include for the above-mentioned pixel in above-mentioned multiple LED display units
The above-mentioned image data of the display unit of three above-mentioned LED illumination regions, relative to above-mentioned each pixel, including being made of more bits
Light-emitting data.
Further include that multiple display color numbers is made to be numbered with multiple instruction palettes in the preferred embodiments of the present invention
Corresponding display color alignment processing portion, above-mentioned multiple display color numbers, which are respectively relative to above-mentioned driving portion, has above-mentioned each pixel
Above-mentioned each LED illumination regions defined light emission luminance, above-mentioned multiple instruction palettes number is included in above-mentioned image data
In, the quantity of above-mentioned multiple instruction palette numbers is fewer than the quantity of above-mentioned multiple display color numbers.
In the preferred embodiments of the present invention, above-mentioned multiple instruction palette numbers shine according to above-mentioned each LED
Each of portion, by more than 3 bits constituting.
In the preferred embodiments of the present invention, above-mentioned multiple display color numbers, according to each of above-mentioned LED illumination regions
It is a, it is made of 8 bits.
The LED display system that the third aspect of the present invention is provided, which is characterized in that including：The first aspect of the present invention
The LED display provided；With to above-mentioned pixel only include two above-mentioned LED illumination regions above-mentioned LED display unit in
The above-mentioned image data input unit of only any one above-mentioned LED display unit inputs the only one controller of above-mentioned image data.
By the detailed description carried out referring to the drawings, other features and advantages of the present invention will be definitely.
Description of the drawings
Fig. 1 is the system construction drawing for the LED display unit for indicating the first embodiment based on the present invention.
Fig. 2（a）It is the amplification view of an example of the pixel for the LED display unit for indicating Fig. 1,（b）With（c）It is table
The amplification view of the variation of the pixel of the LED display unit of diagram 1.
Fig. 3 is the sequence diagram of the image data for the pixel for indicating the LED display unit relative to Fig. 1.
Fig. 4 is the sequence diagram of the image data for the LED display units for indicating the LED display unit relative to Fig. 1.
Fig. 5 is the sequence diagram of the switching action of the image data memory in the LED display unit for indicate Fig. 1.
Fig. 6 is one of the instruction palette number in the LED display unit for indicate Fig. 1 and the corresponding table of display color number
Example.
Fig. 7 is the chart for indicating instruction palette number and display color number and the example of the relationship of brightness.
Fig. 8 is to indicate that palette numbers other for the corresponding table numbered with display color in the LED display unit for indicate Fig. 1
Example.
Fig. 9 is an example for indicating LED display according to the present invention and the LED display system using the device
General view.
Figure 10 is that the LED displays based on second embodiment of the present invention in the LED display indicated for Fig. 9 are single
The system construction drawing of member.
Figure 11 is that the LED displays based on third embodiment of the present invention in the LED display indicated for Fig. 9 are single
The system construction drawing of member.
Figure 12 is the sequence diagram of the image data in the LED display unit for indicate Figure 11.
Figure 13 is the general view for the other examples for indicating LED display according to the present invention.
Figure 14 is that the LED of the 4th embodiment based on the present invention in the LED display indicated for Figure 13 is shown
The system construction drawing of unit.
Symbol description
101~103 LED display units
111 LED displays
121 LED display systems
200 LED display units
210 pixels
220R, 220G, 220B LED illumination region
310 red driving portions
320 green driving portions
330 blue driving portions
410,420 image data memory（Image data memory cell）
510 image data input units
520 image data input and output portions（Image data input unit, image data output section）
600 control units
610 memory switch control portions
620 image real time transfer portions
630 timing controllers
640 display color alignment processing portions
710 image data lines
720 control signal lines
730 return wires
800 controllers
DI image datas
DIR red image datas
DIG is red（Green）Use image data
DIB is red（Blue）Use image data
CI controls signal
CLK clock signals
LAT latch signals
STR gating signals
PN indicates palette number
DN shows color number
Specific implementation mode
In the following, with reference to attached drawing, the preferred embodiment of the present invention is specifically described.
Fig. 1 shows the LED display units of the first embodiment based on the present invention.The LED display unit of present embodiment
101 include：LED display units 200, red driving portion 310, green driving portion 320, blue driving portion 330, image data
Memory 410,420, image data input unit 510 and control unit 600.
LED display units 200 are the positions that image is shown according to the image data DI of the transmission such as from PC, have multiple pictures
Element 210.Include the pixel 210 that 16 rows 16 arrange=256 in the present embodiment.
Fig. 2（a）It is the amplification view for indicating pixel 210.As shown in this figure, there are three LED illumination regions for the tool of pixel 210
220R、220G、220B.LED illumination regions 220R sends out red light, and LED illumination regions 220G sends out green light, LED illumination regions 220B
Send out blue light.LED bare chips of LED illumination regions 220R, 220G, the 220B on by being directly installed on substrate is constituted.Or
Person, can also include respectively by LED chip, store the box of the LED chip and the LED module of the mounting terminal of installation is constituted
LED illumination regions 220R, 220G, 220B.It, can also in order to allow LED illumination regions 220R, 220G, 220B to send out the light of required form and aspect
Using the structure for having the fluorescence resin for covering above-mentioned LED chip.As long as in addition, LED illumination regions 220R, 220G, 220B hair
Go out the structure of the light of mutually different wavelength, illuminant colour is not limited to red, green, blue.In addition, not only in colors
It, can also for the purpose etc. of supplement light quantity in the case that LED illumination regions 220R, 220G, 220B is made of a LED chip
It is made of more than two LED chips.For example, such as the figure（b）Shown in variation it is such, can also be by two red LED cores
Piece 220Ra constitutes LED illumination region 220R, LED illumination region 220G is constituted by a green LED chip, by a blue LED die
Constitute LED illumination regions 220B.Alternatively, such as the figure（c）Shown in variation it is such, can also be by two green LED chip 220Ga
LED illumination region 220G are constituted, LED illumination region 220R is constituted by a red LED chips, LED is constituted by a blue LED die
Illumination region 220B.In addition, the figure（b）In the configuration of two red LED chips 220Ra, the figure（c）In two green LEDs
The configuration of chip 220Ga is example, these configurations can suitably be set.
Red driving portion 310, green driving portion 320, blue are carried out respectively with driving portion 330 for making multiple pixels
210 LED illumination regions 220R, 220G, 220B individually luminous processing driven, such as be made of IC.Red driving portion 310,
Green driving portion 320, blue driving portion 330 can be such that LED illumination regions 220R, 220G, 220B is sent out according to arbitrary brightness
Light, such as adjust by PWM controls the brightness of LED illumination regions 220R, 220G, 220B.
Image data memory 410,420 is used for temporarily storage image data DI, is equivalent to image described in the present invention
One example of data storage cell.Image data memory 410,420 is respectively provided with：To multiple pixels of LED display units 200
210 LED illumination regions 220R, 220G, 220B can store the capacity of the image data DI for the display for being equivalent to a picture.
Image data input unit 510 is the component of the input image data DI such as from PC, in the present embodiment, connection
There are three image data lines 710.For convenience, the radical of this three image datas line 710 and composition pixel 210
The number of LED illumination regions 220R, 220G, 220B correspond to.In addition, except three image datas are in addition to line 710, inputted in image data
Portion 510 is also associated with control signal line 720.Control signal line 720 is used for transmitting the control signal CI from above-mentioned PC.Control
Signal CI processed is used for controlling the timing etc. of the processing of image of the display based on the image data DI in LED display unit 101, such as
Including clock signal, latch signal, gating（strobe）Signal etc..
Control unit 600 is carried out according to the image data DI and control signal CI from above-mentioned PC in LED display units 200
The control process of the middle desired image of display.In the present embodiment, control unit 600 includes：Memory switch control portion
610, image real time transfer portion 620, timing controller 630, display color alignment processing portion 640.Control unit 600 for example by：Operation
Memory switch control portion 610, timing controller 630, shows each of color alignment processing portion 640 at image real time transfer portion 620
The integrated circuit of the CPU of processing etc.；With the memory etc. of storage program and data.But control unit 600 is not limited to include depositing
Reservoir switch control portion 610, image real time transfer portion 620, timing controller 630, display color alignment processing portion 640 it is whole
Structure can also be made of individual IC etc. respectively.
Memory switch control portion 610 carries out the action hand-off process of image data memory 410,420.It is fixed at some
When, image data memory 410 can be set to that the image data DI from image data input unit 510 is written and be protected
The input pattern deposited, and at the same time, image data memory 420 is set to the image real time transfer portion by control unit 600
620 read the output mode of image data DI.According to the control of memory switch control portion 610, image data memory 410,
420 can enable one of them for input pattern arbitrarily periodically taking, and enable the state that another is output mode.Fig. 5 is table
Show the sequence diagram of the switching of the input pattern and output mode of image data memory 410,420.The switching is, for example, from PC
It is carried out when sending the image data DI of a new picture.Switching timing in image is frequent, image data
Memory 410,420 often switches over.On the other hand, for example, not showing some word, figure alternatively in certain certain time
In the case of shape, it is not necessary to which the switching for often carrying out the input pattern and output mode of image data memory 410,420 stops cutting
Changing can also.
In addition it is also possible to using the control function and image data memory that are equivalent to memory switch control portion 610
410, the so-called dual-ported memory of 420 integral packagings.
Image real time transfer portion 620 switches from the switch control portion 610 that is stored by image data memory 410,420
At image data DI is read in the memory of output mode, according to image data DI, used to red driving portion 310, green
Driving portion 320, blue export idsplay order with driving portion 330.Image real time transfer portion 620 is from sometime shown one
The image data DI of a picture sends out each picture to red driving portion 310, green driving portion 320, blue driving portion 330
The instruction for the brightness that LED illumination regions 220R, 220G, 220B of element 210 should shine.
In timing controller 630, by input control signal CI, the display control for being used for controlling LED display unit 101 is generated
Clock signal, latch signal, the gating signal of the timing of system, and these signals are supplied into various pieces.Control signal CI both may be used
To be made of clock signal, latch signal, gating signal itself, for example, it can be timing controllers 630 according to control signal
CI generates the structure of clock signal.Timing controller 630 carries out hand-off process, the picture number in memory switch control portion 610
The reading process of the image data DI implemented according to processing unit 620 and to red driving portion 310, green driving portion 320, blue
Synchronous control needed for the luminous instruction processing of color driving portion 330.In the case of the structure in using present embodiment,
The clock frequency of clock signal is for example configured to 5MHz~10MHz or so.
Fig. 3 is the sequence diagram for the pixel data DI for indicating some pixel 210.Transmission picture number synchronous with clock signal clk
According to DI.Image data DI is by image data DIR（i）、DIG（i）、DIB（i）It constitutes.In addition, i is corresponding with some pixel 210
Pixel number, in the present embodiment, i=0~255.In addition, image data DIR（i）、DIG（i）、DIB（i）By three chromosomes
As data line 710 is sent alone.Image data DIR（i）、DIG（i）、DIB（i）Separately include the information of 3 bits.As a result, will
The image data DI of 3bit × 3=9bit（i）Distribute to pixel 210.
Fig. 4 indicates to be equivalent to the image data in one picture of image that should sometime show in LED display units 200
DI.For image data DIR corresponding with each pixel 210（i）、DIG（i）、DIB（i）, from first pixel 210 to last
Nth pixel 210, from three image datas with line 710 by image data input unit 510, image data memory 410,
Any one in 420 is transmitted to image real time transfer portion 620.In the present embodiment, n=512.
Display color alignment processing portion 640 carries out processing below, will be according to the figure for being transferred into image real time transfer portion 620
As data DI（i）And the instruction palette number PN that is constituted of information of 9 bits generated be equivalent in LED display units 200
In shown display color display color number DN correspondences.
Fig. 6 indicates instruction palette number PN and shows a corresponding example of color number DN.Show color alignment processing
Portion 640 keeps the assorted instruction palette number from image real time transfer portion 620 corresponding with assorted display color number DN.Example
Such as, by image data DIR（i）In the case that indicated red instruction palette number PN is 0, color alignment processing portion is shown
640 keep display color number RL0 corresponding as red display color number DN.The alignment processing is implemented to colors, as a result, will
Display color number RL0~RL7, GL0~GL7, BL0~BL7 any of which to distribute to RGB assorted.
Fig. 7 is the figure indicated about red instruction palette number and display color number and the example of the relationship of brightness
Table.Preset the brightness of LED illumination regions 220R respectively in showing color number RL0~RL7.In the figure, the longitudinal axis indicates LED
The brightness of illumination region 220R, lower end 0%, upper end 100%.Show that color number RL0 is corresponding with 0%, show color number RL7 and
100% corresponds to, and display color number RL1~RL6 is configured to be biased to 0% side.This is corresponding with trend below, is visually seen in the mankind
In the case of examining, even such as half when will not be perceived by 100% brightness of 50% brightness, but feel brighter.Therefore,
By indicating that people can feel the real change of brightness to instruction palette number 0~7.
In addition, making it in substitution, truly the variation of perceived brightness, the desired display of user of LED display unit 101 are wrapped
In the case of the image of delicate Neutral colour for including limited quantity, for example, it is also possible to will from the luminance resolution of assorted 8 bits
Arbitrary 3 bit is allocated as display color number RL0~RL7, GL0~GL7, BL0~BL7.In the case, in pixel
Shown color may not include equably whole form and aspect extensively in 210, but it is desirable with user that it can be made to send out
The fully matched color of delicate Neutral colour.
After display color number RL0~RL7, GL0~GL7, BL0~BL7 being determined by display color alignment processing portion 640, according to
The image display timing for controlling signal CI indicates, to red driving portion 310, green driving portion 320, blue driving portion
330 send out the instruction for keeping pixel 210 luminous.The image instructed from PC is shown in LED display units 200 as a result,.It keeps for red
The luminous instruction of driving portion 330 of color driving portion 310, green driving portion 320, blue, thereby, it is possible to continue to show LED
Image in display unit 200.Alternatively, being judged as replacing without the image from PC in control unit 600, memory switching control
It, can also be according in the state of switching of the portion 610 without the input pattern and output mode of image data memory 410,420
Some cycles continue with the reading of the image data DI carried out by image real time transfer portion 620 and the instruction that shines.In this feelings
Under condition, it can keep being switched in the memory of output mode based on being stored in image data memory 410,420
The image of image data DI is shown.
On the other hand, control unit 600 judges that having issued image from PC replaces requirement, then by memory switch control portion 610
Carry out the switching of the input pattern and output mode of image data memory 410,420.It should according to control signal CI synchronization process
Reading and shine instruction of the hand-off process of memory switch control portion 610 with the image data DI in image real time transfer portion 620
When, the image of moment variation is shown in LED display units 200.
In the following, being illustrated to the effect of LED display unit 101.
According to the present embodiment, it can parallel carry out from image data input unit 510 in image data memory 410,420
In be configured to be written the processing of image data D1, image real time transfer portion 620 in the memory of input pattern from picture number
According to the processing for being configured to read image data DI in the memory of output mode in memory 410,420.As a result, in LED
In a cycle of the display cycle of display unit 200, write-in processing and the reading process of image data DI need not be serially carried out.
Therefore, it is possible in the case where not making system structure complicate, expeditiously carry out LED display unit according to image data DI
101 display.
Image data DI has the information of assorted 3 bits, indicates that palette number PN becomes corresponding with 512 colors as a result,
Number.In this way mostly than specialization carry out multicolor displaying when, at the write-in for carrying out above-mentioned image data DI parallel
The structure of reason and reading process, will not delay the instruction from PC etc. as a result, can suitably carry out the aobvious of LED display units 200
Show control.
By setting the display color number DN more than instruction palette number PN, do not indicated largely to LED display unit 101
Redundant information, can selectively show colorful Neutral colour etc..Using correspondence shown in Fig. 7, thus, it is possible to be carried out
The so-called modified effect of gamma.User is equivalent to the instruction palette number of assorted brightness by instruction as a result,
PN can realize true abundant tonal gradation performance.
Fig. 8 shows instruction palette number PN and the corresponding other examples for showing color number DN.Indicate palette number
PN is defined as 3bit × 3=512 tonal gradations.Here, with each 3 bits of RGB are positioned to assorted solid in the above example
Some tonal gradations are opposite, using 512 tonal gradations as the number for being not secured to RGB.On the other hand, display color number DN is at this
It is to indicate that RGB colors are 8 bit gradation grades in example, and 16, the assorted number of the so-called full color of 777,216 colors.This
It is corresponding to be pre-stored in the memory being built in display color alignment processing portion 640.In addition, the correspondence both can be in LED
It determines, can also be set according to external special indication signal in the manufacturing process of display unit 101.
By using this correspondence, user can appoint from the abundant corresponding mankind by the full-color middle selection of the identification of naked eyes
512 colors of meaning are as display color.
In addition, being different from present embodiment, pixel 210 can also only include for example two LED illumination regions 220R, 220G.
In the case, the structure that only two pixel data lines 710 are connect with image data input unit 510 can be used.In addition, certainly
Blue driving portion 330 is not needed yet.Even if pixel 210 can be by cutting if only including two LED illumination region 220R, 220G
Image data memory 410,420 is changed, more efficiently shows image.Alternatively, it is also possible to by image data DIR（i）、DIG（i）Make
For the so-called ON/OFF of only 1 bit（ON/OFF）The data of tonal gradation.
Fig. 9~Figure 12 indicates the other embodiment of the present invention.In addition, in the drawings, and the above embodiment
Same or similar element marks symbol identical with the above embodiment.
Fig. 9 indicates an example of LED display according to the present invention and the LED display system using the device.This reality
The LED display 111 for applying mode is made of three LED display units 102 and a LED display unit 103.Three LED are aobvious
Show in unit 102, pixel 210 for example only includes two LED illumination region 220R, 220G, and the pixel 210 of LED display unit 103 is wrapped
Include three LED illumination regions 220R, 220G, 220B.The form and aspect of the display color of LED display unit 103 compare LED display unit as a result,
102 is abundant.In addition, the LED display system 121 of present embodiment is made of LED display 111 and controller 800.
Three LED display units 102 and a LED display unit 103 are adjacent to configuration using these LED display units 200
The structure of Cheng Yilie.Such as be located at the LED display unit 102 of right end only into figure from the controller 800 with PC etc. for representative
Aftermentioned image data input and output portion 520 transmits image data DI and control signal CI.In addition, in the present embodiment, to LED
Display device 111 sends image data DI and control signal CI is only carried out by a controller 800.Image data DI
It is transmitted by two image data lines 710, control signal CI is transmitted by control signal line 720.Adjacent LED display unit
102 form so-called cascade with two image data lines 710 and control signal line 720 each other（cascade）Connection.It is located at
The LED display unit 102 Yu LED display unit 103 of the rightmost side are by two image datas line 710 and control signal line in figure
720 connections, form so-called cascade Connection.Moreover, LED display unit 103 is also equipped with return wire 730.
Figure 10 indicates the LED display unit 102 constituted based on second embodiment of the present invention.LED display unit 102
Different from LED display unit 101, including image data input and output portion 520.Image data input and output portion 520 has both this hair
The function of image data input unit and image data output section mentioned in bright.In addition, in the figure, removing LED display units
200, for convenience, the LED that LED display 111 shown in Fig. 9 is mainly described in the state of from back side is shown
Unit 102.Therefore, in the figure, left side is connected with the image data of input from the figure of image data input and output portion 520
With line 710 and control signal line 720.Two of output are connected on the right side of in the figure of image data input and output portion 520
Image data line 710 and control signal line 720.This two image datas line 710 and control signal line 720 with it is adjacent
LED display unit 102 or LED display unit 103 image data input and output portion 520 connect.
Figure 11 indicates the LED display unit 103 constituted based on third embodiment of the present invention.LED display unit 103
It is same as LED display unit 102, including image data input and output portion 520.The image data input and output portion 520 includes three
A image data input terminal.Two terminals in three image data input terminals are connected with aobvious from adjacent LED
Show two image data lines 710 that unit 102 extends.In addition, being connected with from adjacent in image data input and output portion 520
The control signal line 720 that LED display unit 102 extends.In addition, in addition to this, LED display unit 103 is also equipped with return wire
730.Residue of the return wire 730 from the leading-out terminal of image data input and output portion 520 and three image data input terminals
A terminal connection.
Figure 12 indicates an example for the image data DI being entered in LED display 111.In the present embodiment, above-mentioned
Image data DIR in LED display unit 101（i）、DIG（i）By as image data DI（i）Input.In present embodiment
In, such as include the subsidiary address information respectively of LED display unit 102,103 in control signal CI.LED display unit 102,
103 control unit 600 is judged as in the case where the address information sometime indicated from control signal CI meets, by above-mentioned
Processing carry out the reading of image data DI.
First, the address for specifying the LED display unit 102 positioned at right end in fig.9, then in the LED display unit 102
The image data DI in 1 section on the left of middle reading Figure 12.It includes that two LED are sent out that image data DI, which is equivalent to pixel 210 only,
One picture of the LED display unit 102 of light portion 220R, 220G.Next, single from the second LED display of right number in specified Fig. 9
The image data from 1 section of left number second of Figure 12 is then read in the address of member 102 in the LED display unit 102
DI.Then, specify Fig. 9 in from the address of right several third LED display units 102 when, read in the LED display unit 102
1 section image data DI from left several thirds of Figure 12.
Next, when the address of specified LED display unit 103,1 of reading Figure 12 right ends in LED display unit 103
The image data DI in section.In the reading, first, preceding image data DIR is read respectively（i）With image data DIG
（i）, it is stored in the memory using input pattern in image data memory 410,420.Then, it is inputted from image data
Output section 520 output by with image data DIR（i）The image data DIB that identical image data is transmitted with line 710（i）, pass through
Return wire 730 makes it be back to the above-mentioned image data terminal of image data input and output portion 520.It will be used to the image data
Image data DIB of the input of terminal as blue（i）It is stored in image data memory 410,420 and uses input mould
In the memory of formula.Like this, by the time of two pictures of LED display unit 102, LED display unit 103 as a result,
The reading process of image data DI terminates.
Next, in three LED display units 102 and LED display unit 103, according to based on the aobvious of control signal CI
Show synchronizing indication, defined image is shown in each LED display units 200.Then, in LED display 111, horizontally long
Display area in show desired word, image.Then, it is replaced and is required according to the picture from control signal CI, three
In a LED display unit 102 and LED display unit 103, the progress of memory switch control portion 610 image data memory 410,
420 pattern switching, while continuing the display processing of the reading and LED display units 200 of image data DI.
In the present embodiment, display has the form and aspect for primary colors with red and green in three LED display units 102
Image.On the other hand, the display of LED display unit 103 has with the image of form and aspect red, that green, blue is primary colors.Three
In a LED display unit 102 and LED display unit 103, palette number PN is similarly indicated using with LED display unit 101
It is corresponding with display color number DN.
According to the embodiment, such as in the train destination display device being applied to LED display 111 in station
In in the case of, place name, frequency of destination etc. are taken as the text information of the simple form and aspect of comparison, can be by LED
Display unit 102 is shown.On the other hand, it is abundant by the having of carrying out of LED display unit 103 to indicate that the word of train classification is used
The display of form and aspect, it is excellent as which kind of train that thus can intuitively and promptly understand shown train with passenger
Point.
Although LED display 111 can be shown partially in the so-called image close to full-color form and aspect, LED is shown
It is enough that the radical of the image data line 710 of 103 mutual cascade Connection of unit 102 and LED display unit, which is 2,.Here,
In the equipment for having used the LED display with the pixel for including double primary colors, in order to assign its more rich expressive force
And in the case of being replaced as LED display 111, the complicated operation connected up again etc. can be significantly omitted.Especially by adopting
With only to the knot of the 520 input image data DI of image data input and output portion of a LED display unit 102 and control signal CI
The signal wire in the equipment using the LED display of the above-mentioned pixel for having and including double primary colors is used only in structure, can be to
LED display 111 transmits signal.That is, having the advantages that new signal wire need not be laid with such.In addition, present embodiment
In controller 800, can intactly borrow and use the LED display with the pixel for including double primary colors
Controller used in equipment.Therefore, for being set using the existing of LED display with the pixel for including double primary colors
Standby, as long as the operation by the way that part of it to be substituted for LED display 111, can build can be shown partially in close to full-color
The LED display system 121 of the image of form and aspect.
In addition, the variation as LED display 111, can also include multiple LED display units 103.
Figure 13 indicates the other examples of LED display according to the present invention.The LED display of present embodiment
112 include four LED display units 104 constituted based on the 4th embodiment of the invention.Adjacent four LED displays are single
Member 104 is each other by three image datas line 710 and 720 cascade Connection of control signal line.
As shown in figure 14, LED display unit 104 includes：Red driving portion 310, green driving portion 320, blue are used
Driving portion 330, each pixel 210 three LED illumination regions 220R, 220G, 220B as shown in Fig. 2, be made of.In LED display unit
Display processing same as LED display unit 101 is carried out in 104.For the 104 mutual synchronization of each LED display unit, Neng Goushi
Address information in the control signal CI that use is contained in for example employed in LED display 111.
, can be in the case where not making system structure complicate according to the embodiment, expeditiously display has more
The image of chromatic number.
LED display unit, LED display and LED display system according to the present invention are not limited to above-mentioned implementation
Mode.The concrete structure energy of the various pieces of LED display unit according to the present invention, LED display and LED display system
It is enough freely to carry out various changes in design.
For example, as shown in Fig. 9 and Figure 13, the example that multiple LED display units are configured to a row is illustrated, still, this
Invention is not limited to this, can also be configured to two row or more.In the case, multiple LED display units can also use tandem
（Series connection）Other in cascade（cascade）Connection.For example, using the last LED display unit 2 of first row and first LED of secondary series
The structure of display unit connection.Display wide up and down can thus be constituted.
In addition, also illustrate instruction palette number according to LED illumination regions each be 1 bit and 3 bits example,
But more than performance chromatic number preferably 3 bits.For example, it can be each 6 bits of RGB.Thereby, it is possible to carry out the aobvious of 262,144 colors
Show.In order to successfully show image, the image data of 6 bits is sent by serial communication, therefore, clock frequency becomes 5MHz
~10MHz.In the prior art, full-color display is for example carried out with 1MHz or so by parallel communications, still, in the knot of the present invention
In structure, clock frequency becomes 6 times（It is 3 times in the case of 3 bits）, still, also control in the range of 5MHz~10MHz.To the greatest extent
Pipe is in this way, it is, for example, 262,144 color in the case of 6 bits that can also carry out performance chromatic number, for 512 colors in the case of 3 bit
So-called colorful display.It also can fully be realized in communication interface used in the prior art under the frequency of this degree.Cause
This, the display unit of the present invention is assembled in display device existing in theprior art also can unquestionably act（It is colorful aobvious
Show）.Certainly, also the same in the case where pixel includes double-colored LED illumination regions, indicate number preferably 3 bits of palette with
On.
In addition, being illustrated so that the radical of image data line is only 2, is only 3 as an example, but can also be 4
It is more than root.By increasing the radical of image data line, the range that can refer to fixation can be expanded.
In addition, the example of the LED illumination regions for tri- color of LED illumination regions or RGB that pixel includes RG dichromatisms is also illustrated, but
It is that pixel can also include also including the LED illumination regions of four colors of its allochromatic colour such as yellow in addition to RGB.Certainly, pixel can also wrap
Include the LED illumination regions of the five colors or more.
Claims (21)
1. a kind of LED display unit, which is characterized in that including：
LED display units have multiple pixels, which includes the different more than two LED illumination regions of illuminant colour；
Driving portion carries out the light emitting control of the LED illumination regions of the LED display units；
Two image data memory cells store the image data shown respectively in the LED display units；
Image data input unit is entered described image data；With
Control unit enables any one of described two image data memory cells come from described image data input part for write-in
Described image data input pattern, and enable described two image data memory cells another for the figure can be read
As the output mode of data,
Make multiple display color numbers and multiple instruction palette number corresponding display color alignment processings portion,
The multiple display color number, which is respectively relative to the driving portion, has each LED illumination regions of each pixel
Defined light emission luminance,
The multiple instruction palette number is included in described image data, the quantity ratio of the multiple instruction palette number
The quantity of the multiple display color number is few.
2. LED display unit as described in claim 1, it is characterised in that：
The multiple pixel is arranged in a matrix.
3. LED display unit as claimed in claim 1 or 2, it is characterised in that：
The pixel includes at least three LED illumination regions.
4. LED display unit as claimed in claim 3, it is characterised in that：
At least three LED illumination regions include：The LED illumination regions of burn red, the LED illumination regions of glow green and the color that turns blue
The LED illumination regions of light.
5. LED display unit as claimed in claim 4, it is characterised in that：
At least one of three LED illumination regions includes more than two LED chips.
6. LED display unit as claimed in claim 1 or 2, it is characterised in that：
Described image data include the light-emitting data being made of more bits relative to each pixel.
7. LED display unit as described in claim 1, it is characterised in that：
The multiple instruction palette number, according to each of each LED illumination regions, is made of 1 bit.
8. LED display unit as described in claim 1, it is characterised in that：
The multiple instruction palette number, according to each of each LED illumination regions, by more than 3 bits constituting.
9. the LED display unit as described in any one of claim 1,7 or 8, it is characterised in that：
The multiple display color number, according to each of each LED illumination regions, is made of 8 bits.
10. a kind of LED display, it is characterised in that：
It includes multiple LED display units described in claim 1,
Each LED display unit has the image data of described image data of the output from described image data input part
Output section,
Multiple LED display units use cascade Connection,
Multiple LED display units include：The pixel only includes LED display unit and the institute of two LED illumination regions
The LED display unit that pixel only includes three LED illumination regions is stated,
It includes two institutes that the described image data shown in multiple LED display units, which are all input to the pixel only,
State the described image data input of only any one of LED display unit in the LED display unit of LED illumination regions
Portion.
11. LED display as claimed in claim 10, it is characterised in that：
The input and output of described image data are carried out with the clock frequency of 5MHz~10MHz.
12. LED display as claimed in claim 11, it is characterised in that：
The described image data input part of the adjacent LED display unit is connect with described image data output section.
13. the LED display as described in any one of claim 10~12, it is characterised in that：
The pixel in multiple LED display units only includes the LED display unit of two LED illumination regions, in institute
Image data input unit and described image data output section are stated, two figures being connect with adjacent LED display unit are only connected with
As data line.
14. the LED display as described in any one of claim 10~12, it is characterised in that：
The pixel in multiple LED display units only includes the LED display unit of three LED illumination regions, in institute
Image data input unit and described image data output section are stated, three figures being connect with adjacent LED display unit are only connected with
As data line.
15. LED display as claimed in claim 11, it is characterised in that：
The pixel in multiple LED display units only includes the LED display unit of three LED illumination regions, has
The return wire being connect with described image data output section and described image data input part.
16. LED display as claimed in claim 10, it is characterised in that：
Only three LED illumination regions include：The LED illumination regions of burn red, the LED illumination regions of glow green and hair
The LED illumination regions of blue light.
17. LED display as claimed in claim 10, it is characterised in that：
It only include the LED display unit of three LED illumination regions for the pixel in multiple LED display units
Described image data, relative to each pixel, including the light-emitting data being made of more bits.
18. LED display as claimed in claim 17, it is characterised in that：
Multiple LED display units are also equipped with display color alignment processing portion, and multiple display color numbers is made to be adjusted with multiple instructions
Colour table number corresponds to,
The multiple display color number, which is respectively relative to the driving portion, has each LED illumination regions of each pixel
Defined light emission luminance,
The multiple instruction palette number is included in described image data, the quantity ratio of the multiple instruction palette number
The quantity of the multiple display color number is few.
19. LED display as claimed in claim 18, it is characterised in that：
The multiple instruction palette number, according to each of each LED illumination regions, by more than 3 bits constituting.
20. the LED display as described in claim 18 or 19, it is characterised in that：
The multiple display color number, according to each of each LED illumination regions, is made of 8 bits.
21. a kind of LED display system, which is characterized in that including：
LED display described in claim 11；With
Only any one of LED into the pixel only LED display unit including two LED illumination regions is aobvious
Show the controller of the only one of the described image data input part input described image data of unit.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012262848 | 2012-11-30 | ||
| JP2012-262848 | 2012-11-30 | ||
| JP2013-220875 | 2013-10-24 | ||
| JP2013220875A JP6343138B2 (en) | 2012-11-30 | 2013-10-24 | LED display device |
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| CN103854608A CN103854608A (en) | 2014-06-11 |
| CN103854608B true CN103854608B (en) | 2018-10-02 |
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| CN201310631646.5A Expired - Fee Related CN103854608B (en) | 2012-11-30 | 2013-12-02 | LED display unit, LED display and LED display system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702200B (en) * | 2014-11-28 | 2018-06-26 | 西安诺瓦电子科技有限公司 | LED display methods, LED structure, LED display unit and LED display |
| CN105989800B (en) * | 2015-02-12 | 2019-11-29 | 西安诺瓦星云科技股份有限公司 | LED display methods and dependency structure and device based on sub-pix down-sampling |
| CN105989801B (en) * | 2015-02-12 | 2018-11-30 | 西安诺瓦电子科技有限公司 | LED display methods, LED display unit array, display control unit |
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