CN103854608A - LED display unit, LED display device and LED display system - Google Patents
LED display unit, LED display device and LED display system Download PDFInfo
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- CN103854608A CN103854608A CN201310631646.5A CN201310631646A CN103854608A CN 103854608 A CN103854608 A CN 103854608A CN 201310631646 A CN201310631646 A CN 201310631646A CN 103854608 A CN103854608 A CN 103854608A
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Abstract
The invention provides an LED display unit, an LED display device and an LED display system. Images with more chromatic numbers are displayed highly-efficiently, without the structure of the system being complicated. The LED display unit comprises an LED display part (200) which comprises a plurality of pixels (210) comprising more than two LED luminous parts of different illuminant colors; the LED display unit also comprises driving parts (310, 320, 330) performing light emitting control of the LED luminous parts of the LED display part (200); the LED display unit also comprises two image data storage units (410, 420) separately storing image data (DI) displayed on the LED display part (200); and the LED display unit further comprises a control part (600) which allows any one of the image storage units (410, 420) to write in an input pattern of the image data (DI) of the image data input part (510), and the other one of the image storage units (410, 420) to be capable of reading an output pattern of the image data (DI).
Description
Technical field
The present invention relates to LED display unit, LED display device and LED display system.
Background technology
Comprising in the LED display unit of the LED display part being formed by the multiple LED chips that are rectangular configuration, be suggested (for example, patent documentation 1) with the form of digital serial signal from the scheme of the transmission view data such as PC (hereinafter referred to as PC).In this structure, above-mentioned PC generates the Digital Image Data being made up of multiple pixels of digital gray scale grade respectively with for example RGB from the image that should show.This Digital Image Data sends to above-mentioned LED display unit with the form of digital serial signal.Thus, for example, with send the structure of view data by analog form compared with, the labile factor can reduce signal transmission time, improves display quality.
But, the timing showing for image in above-mentioned LED display unit, preferably from be judged as YES the moment of the timing that should show among above-mentioned PC beginning substantially to show in real time.For example in above-mentioned LED display unit, show that image is according to the so-called normal image of time series variation, the picture frequency that must can be identified as the degree of smooth image according to observer sends above-mentioned view data.In the one-period of this picture frequency, force to carry out following processing: in above-mentioned LED display unit, receive the processing from the view data of above-mentioned PC; The control signals such as clock signal according to the rules keep the processing of above-mentioned view data according to each pixel; For example send instruction to drive division, thus, above-mentioned LED chip is carried out to the processing of light emitting control.Therefore, for example, must shorten delivery time of view data, require to send by many lines (cable) scheme of above-mentioned view data etc.Or even the less word demonstration of the variation of the destination display panel equal time sequence of electric car, the general method that also adopts roll display word, needs carry out more at high speed the reception of above-mentioned view data and the light emitting control of processing and above-mentioned LED chip.Particularly require it to have in the situations such as delicate Neutral colour as the demonstration look in above-mentioned LED display unit, it is huge that the conveying capacity of above-mentioned view data easily becomes.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2000-293119 communique
Summary of the invention
Invent technical matters to be solved
The present invention considers according to above-mentioned situation, and its technical matters is, provides a kind of in the situation that not making system architecture complicated, shows and has more LED display unit, LED display device and the LED display system of the image of polychrome number expeditiously.
For the technological means of technical solution problem
The LED display unit that a first aspect of the present invention provides, is characterized in that, comprising: LED display part, and it possesses multiple pixels, and this pixel comprises the plural LED illuminating part that illuminant colour is different; Drive division, it carries out the light emitting control of the above-mentioned LED illuminating part of above-mentioned LED display part; Two image data memory cell, the view data that its storage shows at above-mentioned LED display part respectively; Image data input unit, it is transfused to above-mentioned view data; And control part, its make above-mentioned two image data memory cell any one be the input pattern writing from the above-mentioned view data of above-mentioned image data input unit, and make above-mentioned two image data memory cell (another) for reading the output mode of above-mentioned view data.
Of the present invention preferred embodiment in, above-mentioned multiple pixels are rectangular configuration.
Of the present invention preferred embodiment in, above-mentioned pixel comprises at least three above-mentioned LED illuminating parts.
Of the present invention preferred embodiment in, above-mentioned at least three LED illuminating parts comprise: the LED illuminating part of the LED illuminating part of burn red, the LED illuminating part of glow green and the coloured light that turns blue.
Of the present invention preferred embodiment in, at least one of above-mentioned three LED illuminating parts comprises plural LED chip.
Of the present invention preferred embodiment in, above-mentioned view data comprises with respect to above-mentioned each pixel the light-emitting data being made up of many bits.
Of the present invention preferred embodiment in, also comprise: make multiple demonstration look numberings number corresponding demonstration look alignment processing portion with multiple indication palettes, multiple demonstration look numberings have respectively the luminosity of the regulation of above-mentioned each LED illuminating part of above-mentioned each pixel with respect to above-mentioned drive division, multiple indication palette numberings are included in above-mentioned view data, and the quantity of above-mentioned multiple indication palette numberings is fewer than the quantity of above-mentioned multiple demonstration look numberings.
Of the present invention preferred embodiment in, above-mentioned multiple indication palettes numbering, according to above-mentioned each LED illuminating part each, is made up of 1 bit.
Of the present invention preferred embodiment in, above-mentioned multiple indication palettes numbering, according to above-mentioned LED illuminating part each, is made up of above 3 bits.
Of the present invention preferred embodiment in, above-mentioned multiple demonstration looks numbering, according to luminous each of above-mentioned each LED, is made up of 8 bits.
The LED display unit that a second aspect of the present invention provides, comprise multiple LED display units that a first aspect of the present invention provides, above-mentioned each LED display device possesses the view data efferent of output from the above-mentioned view data of above-mentioned image data input unit, above-mentioned multiple LED display device adopts cascade (tandem, cascade) to connect.
Of the present invention preferred embodiment in, the input and output of above-mentioned view data, carry out with the clock frequency of 5MHz～10MHz.
Of the present invention preferred embodiment in, the above-mentioned image data input unit of adjacent above-mentioned LED display unit is connected with above-mentioned view data efferent.
Of the present invention preferred embodiment in, above-mentioned multiple LED display units comprise: above-mentioned pixel only comprises the display unit of (possessing) two above-mentioned LED illuminating parts.
Of the present invention preferred embodiment in, above-mentioned pixel in above-mentioned multiple LED display unit only comprises the display unit of two above-mentioned LED illuminating parts, at above-mentioned image data input unit and above-mentioned view data efferent, be only connected with two lines for view data (cable, cable).
Of the present invention preferred embodiment in, above-mentioned multiple LED display units comprise: above-mentioned pixel only comprises the display unit of (possessing) three above-mentioned LED illuminating parts.
Of the present invention preferred embodiment in, the above-mentioned pixel in above-mentioned multiple LED display units only comprises the display unit of three above-mentioned LED illuminating parts, is only connected with three view data lines in above-mentioned image data input unit and above-mentioned view data efferent.
Of the present invention preferred embodiment in, above-mentioned multiple LED display units comprise: above-mentioned pixel only comprises the display unit of two above-mentioned LED illuminating parts, and above-mentioned pixel only comprises the display unit of three above-mentioned LED illuminating parts.
Of the present invention preferred embodiment in, the above-mentioned view data showing in above-mentioned multiple LED display units is all input to only any one the above-mentioned image data input unit in the above-mentioned LED display unit that above-mentioned pixel only comprises two above-mentioned LED illuminating parts.
Of the present invention preferred embodiment in, the above-mentioned pixel in above-mentioned multiple LED display units only comprises the display unit of three above-mentioned LED illuminating parts, possesses the return wire being connected with above-mentioned view data efferent and above-mentioned image input part.
Of the present invention preferred embodiment in, the above-mentioned pixel in above-mentioned multiple LED display units only comprises the above-mentioned pixel of the display unit of three above-mentioned LED illuminating parts, comprises three above-mentioned LED illuminating parts.
Of the present invention preferred embodiment in, the above-mentioned only above-mentioned LED illuminating part of three comprises: the LED illuminating part of the LED illuminating part of burn red, the LED illuminating part of glow green and the coloured light that turns blue.
Of the present invention preferred embodiment in, only comprise for the above-mentioned pixel in above-mentioned multiple LED display units and the above-mentioned view data of the display unit of three above-mentioned LED illuminating parts with respect to above-mentioned each pixel, comprise the light-emitting data being formed by many bits.
Of the present invention preferred embodiment in, also comprise and make multiple demonstration look numberings number corresponding demonstration look alignment processing portion with multiple indication palettes, above-mentioned multiple demonstration look numbering has respectively the luminosity of the regulation of above-mentioned each LED illuminating part of above-mentioned each pixel with respect to above-mentioned drive division, above-mentioned multiple indication palette numbering is included in above-mentioned view data, and the quantity of above-mentioned multiple indication palette numberings is fewer than the quantity of above-mentioned multiple demonstration look numberings.
Of the present invention preferred embodiment in, above-mentioned multiple indication palettes numbering, according to above-mentioned each LED illuminating part each, is made up of above 3 bits.
Of the present invention preferred embodiment in, above-mentioned multiple demonstration looks numbering, according to above-mentioned LED illuminating part each, is made up of 8 bits.
The LED display system that a third aspect of the present invention provides, is characterized in that, comprising: the LED display device that a first aspect of the present invention provides; Input the only controller of above-mentioned view data with the above-mentioned image data input unit that only comprises only any one the above-mentioned LED display unit in the above-mentioned LED display unit of two above-mentioned LED illuminating parts to above-mentioned pixel.
By the detailed description of carrying out referring to accompanying drawing, other features and advantages of the present invention will be clearer and more definite.
Accompanying drawing explanation
Fig. 1 is the system construction drawing that represents the LED display unit based on the first embodiment of the present invention.
Fig. 2 (a) is the amplification view of an example of the pixel of the LED display unit of presentation graphs 1, is (b) and (c) amplification view of the variation of the pixel of the LED display unit of presentation graphs 1.
Fig. 3 is the sequential chart representing with respect to the view data of the pixel of the LED display unit of Fig. 1.
Fig. 4 is the sequential chart representing with respect to the view data of the LED display part of the LED display unit of Fig. 1.
Fig. 5 is the sequential chart of the switching action of the image data memory in the LED display unit of presentation graphs 1.
Fig. 6 is the indication palette numbering and an example that shows the corresponding table that look is numbered in the LED display unit of presentation graphs 1.
Fig. 7 is the chart that represents to indicate palette numbering and show the example of the relation of look numbering and brightness.
Fig. 8 is the indication palette numbering and other examples that show the corresponding table that look is numbered in the LED display unit of presentation graphs 1.
Fig. 9 is the general view that represents an example of LED display device involved in the present invention and use the LED display system of this device.
Figure 10 is the system construction drawing representing for the LED display unit based on the second embodiment of the present invention of the LED display device of Fig. 9.
Figure 11 is the system construction drawing representing for the LED display unit based on the 3rd embodiment of the present invention of the LED display device of Fig. 9.
Figure 12 is the sequential chart that represents the view data in the LED display unit of Figure 11.
Figure 13 is the general view that represents other examples of LED display device involved in the present invention.
Figure 14 is the system construction drawing representing for the LED display unit based on the 4th embodiment of the present invention of the LED display device of Figure 13.
Symbol description
101～103 LED display units
111 LED display device
121 LED display systems
200 LED display parts
210 pixels
220R, 220G, 220B LED illuminating part
310 redness drive divisions
320 green drive divisions
330 blueness drive divisions
410,420 image data memories (image data memory cell)
510 image data input unit
520 view data input and output portions (image data input unit, view data efferent)
600 control parts
610 storer switch control portion
620 view data handling parts
630 timing controllers
640 show look alignment processing portion
710 view data lines
720 control signal lines
730 return wires
800 controllers
DI view data
DIR redness view data
DIG redness (green) is used view data
DIB redness (blueness) is used view data
CI control signal
CLK clock signal
LAT latch signal
STR gating signal
PN indication palette numbering
DN shows look numbering
Embodiment
Below, with reference to accompanying drawing, the preferred embodiment of the present invention is specifically described.
Fig. 1 represents the LED display unit based on the first embodiment of the present invention.The LED display unit 101 of present embodiment comprises: LED display part 200, red with drive division 310, green with drive division 320, blue with drive division 330, image data memory 410,420, image data input unit 510 and control part 600.
Fig. 2 (a) is the amplification view that represents pixel 210.As shown in this figure, pixel 210 has three LED illuminating part 220R, 220G, 220B.LED illuminating part 220R sends red light, and LED illuminating part 220G sends green light, and LED illuminating part 220B sends blue light.LED illuminating part 220R, 220G, 220B are for example made up of the LED bare chip being directly installed on substrate etc.Or, also can comprise respectively by LED chip, the LED module receiving the box of this LED chip and the mounting terminal of use is installed and form LED illuminating part 220R, 220G, 220B.In order to allow LED illuminating part 220R, 220G, 220B send the light of required form and aspect, also can adopt the structure that possesses the fluorescence resin that covers above-mentioned LED chip.In addition, LED illuminating part 220R, 220G, 220B are as long as sending the structure of light of mutually different wavelength, and illuminant colour is not limited to redness, green, blueness.In addition, not only in the case of LED illuminating part 220R of all kinds, 220G, 220B are made up of a LED chip, for the object etc. of supplementing light quantity, also can be formed by plural LED chip.For example, variation is as the figure (b) such, also can form LED illuminating part 220R by two red LED chips 220Ra, forms LED illuminating part 220G by a green LED chip, forms LED illuminating part 220B by a blue led chip.Or, the variation shown in this figure (c), also can form LED illuminating part 220G by two green LED chip 220Ga, form LED illuminating part 220R by a red LED chips, form LED illuminating part 220B by a blue led chip.In addition, the configuration of two green LED chip 220Ga in the configuration of two red LED chips 220Ra in this figure (b), this figure (c) is example, and these configurations can suitably be set.
Red with drive division 310, green for drive division 320, blueness drive division 330 be used for respectively making LED illuminating part 220R, the 220G of multiple pixels 210, the processing of the independent luminous driving of 220B, for example formed by IC.Red with drive division 310, green for drive division 320, blueness drive division 330 can make LED illuminating part 220R, 220G, 220B luminous according to brightness arbitrarily, for example control to adjust the brightness of LED illuminating part 220R, 220G, 220B by PWM.
Image data memory 410,420 is used for temporary transient storing image data DI, is equivalent to an example of said image data memory cell in the present invention.Image data memory 410,420 has respectively: the LED illuminating part 220R of the multiple pixels 210 to LED display part 200, the capacity that 220G, 220B can store the view data DI of the demonstration that is equivalent to a picture.
Image data input unit 510 is for example parts from input image data DI such as PC, in the present embodiment, is connected with three lines 710 for view data.For simplicity, the number of the radical of these three view data use lines 710 and the LED illuminating part 220R of formation pixel 210,220G, 220B is corresponding.In addition, except three view data are with line 710, be also connected with line 720 for control signal in image data input unit 510.Control signal is used for sending the control signal CI from above-mentioned PC with line 720.The timings of the processing that control signal CI is used for controlling the image that shows view data DI based in LED display unit 101 etc., for example, comprise clock signal, latch signal, gating (strobe) signal etc.
Storer switch control portion 610 is carried out the action hand-off process of image data memory 410,420.In certain timing, image data memory 410 can be set for and write from the view data DI of image data input unit 510 and by the input pattern of its preservation, and meanwhile, image data memory 420 is set for to the output mode by the view data handling part 620 reads image data DI of control part 600.According to the control of storer switch control portion 610, it is input pattern that image data memory 410,420 can take to make one of them in timing arbitrarily, and making another is the state of output mode.Fig. 5 is the sequential chart of the input pattern of presentation video data-carrier store 410,420 and the switching of output mode.This switching is for example to carry out when send the view data DI of a new picture from PC.In the switching timing of image, frequently in situation, image data memory 410,420 often switches.On the other hand, for example, in the situation that certain certain hour does not show certain word, figure, needn't often carry out the input pattern of image data memory 410,420 and the switching of output mode with changing, stop switching also passable.
In addition, also can adopt and be equivalent to the control function of storer switch control portion 610 and the so-called dual-ported memory of image data memory 410,420 integral packagings.
View data handling part 620 is stored reads image data DI in the storer that device switch control portion 610 switches to output mode from image data memory 410,420, according to this view data DI, to drive division 310, green with drive division 320, blue with drive division 330 output display instructions for redness.View data handling part 620 is from the view data DI of a picture shown sometime, to drive division 310 for redness, green with drive division 320, bluely send the LED illuminating part 220R of each pixel 210, the instruction that 220G, 220B answer luminous brightness with drive division 330.
In timing controller 630, by input control signal CI, generate clock signal, latch signal, the gating signal of the timing of the demonstration control that is used for controlling LED display unit 101, and these signals are supplied with to various piece.Control signal CI both can be made up of clock signal, latch signal, gating signal itself, for example, can be also that timing controller 630 is according to the structure of control signal CI generated clock signal.Timing controller 630 carry out that reading of the view data DI that implements at the hand-off process of storer switch control portion 610, view data handling part 620 processed and to drive division 310 redness for, green with drive division 320, bluely use required synchro control in the luminous instruction process of drive division 330.Structure in employing present embodiment, the clock frequency of clock signal is for example configured to 5MHz～10MHz left and right.
Fig. 3 is the sequential chart that represents the pixel data DI of certain pixel 210.With clock signal clk synchronized transmission view data DI.This view data DI is by view data DIR(i), DIG(i), DIB(i) form.In addition, i is the pixel number corresponding with certain pixel 210, in the present embodiment, and i=0～255.In addition, view data DIR(i), DIG(i), DIB(i) transmitted separately with lines 710 by three view data.View data DIR(i), DIG(i), DIB(i) comprise respectively the information of 3 bits.Thus, by the view data DI(i of 3bit × 3=9bit) distribute to pixel 210.
Fig. 4 represents to be equivalent to the view data DI at a picture of image that should show in LED display part 200 sometime.For the view data DIR(i corresponding with each pixel 210), DIG(i), DIB(i), from first pixel 210 to n last pixel 210, transmit to view data handling part 620 by any one image data input unit 510, image data memory 410,420 with line 710 from three view data.In the present embodiment, n=512.
Showing that look alignment processing portion 640 carries out following processing, by according to the view data DI(i that is transferred into view data handling part 620) to number DN corresponding for the indication palette numbering PN that the information of 9 bits that generate forms and the demonstration look that is equivalent to demonstration look shown in LED display part 200.
Fig. 6 represents to indicate palette numbering PN and a corresponding example that shows look numbering DN.Show that look alignment processing portion 640 makes from the indication palette numbering of all kinds of view data handling part 620 corresponding with demonstration look numbering DN of all kinds.For example,, by view data DIR(i) in the indicated red indication palette numbering PN situation that is 0, show that look alignment processing portion 640 makes to show that look numbering RL0 is corresponding with it numbers DN as red demonstration look.To this alignment processing of enforcement of all kinds, thus, by show look numbering RL0～RL7, GL0～GL7, BL0～BL7 wherein any to distribute to RGB of all kinds.
Fig. 7 represents about red indication palette numbering and shows that look is numbered and the chart of the example of the relation of brightness.In demonstration look numbering RL0～RL7, preset respectively the brightness of LED illuminating part 220R.In the figure, the longitudinal axis represents the brightness of LED illuminating part 220R, and lower end is 0%, and upper end is 100%.Show that look numbering RL0 is corresponding with 0%, show that look numbering RL7 is corresponding with 100%, show that look numbering RL1～RL6 is configured to be partial to 0% 1 side.This is corresponding with following trend, the in the situation that of mankind's visualization, even half when for example 50% brightness can not be perceived by 100% brightness yet, but feel brighter.Therefore,, by indication palette numbering 0～7 is indicated, people can feel the real change of brightness.
In addition, in the case of replacement make its truly the user of variation, the LED display unit 101 of perceived brightness want to show and comprise the image of delicate Neutral colour of limited quantity, for example, also can from the luminance resolution of 8 bits of all kinds, incite somebody to action 3 bits arbitrarily distributes as demonstration look numbering RL0～RL7, GL0～GL7, BL0～BL7.In the case, look shown in pixel 210 may not extensively comprise whole form and aspect equably, but can make it send the color of fully mating with the desirable delicate Neutral colour of user.
By showing that look alignment processing portion 640 determines to show after look numbering RL0～RL7, GL0～GL7, BL0～BL7, according to the image Displaying timer indication of control signal CI, to drive division 310 redness for, green for drive division 320, blueness drive division 330 send the instruction that makes pixel 210 luminous.Thus, in LED display part 200, show the image from PC instruction.Keep, for drive division 310, green with drive division 320, the blue luminous indication with drive division 330 for redness, thus, can continuing to show the image in LED display part 200.Or, being judged as at control part 600 image not carrying out from PC replaces, storer switch control portion 610 is not carried out under the state of the input pattern of image data memory 410,420 and the switching of output mode, and the view data DI that also can be undertaken by view data handling part 620 according to some cycles continuation processing reads and luminous indication.In the case, can keep the image of the view data DI in the storer that is switched to output mode based on being stored in image data memory 410,420 to show.
On the other hand, control part 600 judges that having sent image from PC replaces requirement, carries out the input pattern of image data memory 410,420 and the switching of output mode by storer switch control portion 610.According to control signal CI synchronously process the hand-off process of this storer switch control portion 610 and the view data DI of view data handling part 620 read with luminous indication time, in LED display part 200, show the moment change image.
Below, the effect of LED display unit 101 is described.
According to present embodiment, can walk abreast and carry out writing in the storer that is configured to input pattern image data memory 410,420 from image data input unit 510 processing of reads image data DI in the processing, the storer that is configured to output mode of view data handling part 620 from image data memory 410,420 of view data D1.Thus, in the one-period of display cycle of LED display part 200, do not need serial to carry out writing of view data DI and process and read processing.Therefore, can, in the situation that not making system architecture complicated, carry out expeditiously the demonstration of LED display unit 101 according to view data DI.
View data DI has the information of 3 bits of all kinds, and thus, indication palette numbering PN becomes the numeral with 512 looks corresponding.By so many while carrying out multicolor displaying than specialization, adopt and parallelly carries out writing of above-mentioned view data DI and process and read the structure of processing, thus, can not delay the instruction from PC etc., can suitably carry out the demonstration control of LED display part 200.
By the setting demonstration look numbering DN more than indication palette numbering PN, do not indicate a large amount of redundant informations to LED display unit 101, can show selectively colorful Neutral colour etc.Adopt the correspondence shown in Fig. 7, can obtain thus the effect of carrying out so-called gamma correction.Thus, user is equivalent to the indication palette numbering PN of brightness of all kinds by indication, can realize true abundant gray shade scale performance.
Fig. 8 represents to indicate palette numbering PN and other the corresponding examples that show look numbering DN.Indication palette numbering PN is defined as 3bit × 3=512 gray shade scale.At this, with in above-mentioned example, each RGB 3 bits to be positioned to intrinsic gray shade scale of all kinds relative, using 512 gray shade scales as the numbering that is not fixed on RGB.On the other hand, show look numbering DN be in the present example represent RGB of all kinds be 8 bit gradation grades, and the numbering of all kinds of the so-called full color of 16,777,216 looks.This correspondence is stored in advance in and is built in the storer showing in look alignment processing portion 640.In addition, this correspondence both can be determined in the manufacturing process of LED display unit 101, also can set according to the special indicator signal of outside.
By adopting this correspondence, user can be from the abundant corresponding mankind the identification by naked eyes full-color selection arbitrarily 512 looks as showing look.
In addition, be different from present embodiment, pixel 210 for example also can only comprise two LED illuminating part 220R, 220G.In the case, can adopt only two structures that pixel data line 710 is connected with image data input unit 510.In addition, certainly do not need the blue drive division 330 of using yet.Even if pixel 210 only comprises two LED illuminating part 220R, 220G, also can, by switching image data memory 410,420, show more efficiently image.In addition, also can be using view data DIR(i), DIG(i) as the data of so-called ON/OFF (ON/OFF) gray shade scale of 1 bit only.
Fig. 9～Figure 12 represents other embodiments of the present invention.In addition, in these accompanying drawings, the symbol identical with above-mentioned embodiment with the same or similar element annotation of above-mentioned embodiment.
Fig. 9 represents an example of LED display device involved in the present invention and uses the LED display system of this device.The LED display device 111 of present embodiment is made up of three LED display units 102 and a LED display unit 103.In three LED display units 102, pixel 210 for example only comprises two LED illuminating part 220R, 220G, and the pixel 210 of LED display unit 103 comprises three LED illuminating part 220R, 220G, 220B.Thus, the form and aspect of the demonstration look of LED display unit 103 are abundanter than LED display unit 102.In addition, the LED display system 121 of present embodiment is made up of LED display device 111 and controller 800.
Three LED display units 102 and a LED display unit 103 adopt these LED display parts 200 to be adjacent to be configured to the structure of row.For example only transmit view data DI and control signal CI to the aftermentioned view data input and output portion 520 that is positioned at the LED display unit 102 of right-hand member figure from the controller 800 take PC etc. as representative.In addition, in the present embodiment, send view data DI and control signal CI is only undertaken by a controller 800 to LED display device 111.View data DI is transmitted with line 710 by two view data, and control signal CI is transmitted with line 720 by control signal.Adjacent LED display unit 102 forms so-called cascade (cascade) with two view data lines 710 and control signal line 720 each other and is connected.The LED display unit 102 that is arranged in the figure rightmost side is connected by two view data lines 710 and control signal line 720 with LED display unit 103, forms so-called cascade and connects.And LED display unit 103 also possesses return wire 730.
Figure 10 represents the LED display unit 102 forming based on the second embodiment of the present invention.LED display unit 102 is different from LED display unit 101, comprises view data input and output portion 520.View data input and output portion 520 has the function of image data input unit mentioned in the present invention and view data efferent concurrently.In addition, in the figure, except LED display part 200, for simplicity, mainly under the state of observing from dorsal part, recorded the LED display unit 102 of the LED display device 111 shown in Fig. 9.Therefore, in the figure, from the figure of view data input and output portion 520, left side is connected with the view data line 710 of input use and line 720 for control signal.In the figure of view data input and output portion 520, right side is connected with two view data line 710 of output use and line 720 for control signal.These two view data are connected with adjacent LED display unit 102 or the view data input and output portion 520 of LED display unit 103 with line 710 and control signal line 720.
Figure 11 represents the LED display unit 103 forming based on the 3rd embodiment of the present invention.LED display unit 103 is same with LED display unit 102, comprises view data input and output portion 520.This view data input and output portion 520 comprises three view data input terminals.At two terminals of three view data inputs in terminal, be connected with two lines 710 for view data that extend from adjacent LED display unit 102.In addition, be connected with in view data input and output portion 520 line 720 for control signal extending from adjacent LED display unit 102.In addition, in addition, LED display unit 103 also possesses return wire 730.Return wire 730 is connected with a remaining terminal of terminal with three view data inputs from the lead-out terminal of view data input and output portion 520.
Figure 12 represents to be transfused to an example of the view data DI in LED display device 111.In the present embodiment, the view data DIR(i in above-mentioned LED display unit 101), DIG(i) be used as view data DI(i) input.In the present embodiment, for example in control signal CI, comprise the address information that LED display unit 102,103 attaches respectively.The control part 600 of LED display unit 102,103 is judged as in the case of the address information from control signal CI indication meets sometime, carries out reading in of view data DI by above-mentioned processing.
First, be positioned the address of the LED display unit 102 of right-hand member at Fig. 9 middle finger, so read 1 interval view data DI in Figure 12 left side in this LED display unit 102.This view data DI is equivalent to the picture that pixel 210 only comprises the LED display unit 102 of two LED illuminating part 220R, 220G.Next, specify the address from right several second LED display unit 102 in Fig. 9, then in this LED display unit 102, read Figure 12 from 1 of left several second interval view data DI.Then, while specifying in Fig. 9 the address from right several the 3rd LED display units 102, in this LED display unit 102, read Figure 12 from 1 interval view data DI of left several the 3rd.
Next,, while specifying the address of LED display unit 103, in LED display unit 103, read 1 interval view data DI of Figure 12 right-hand member.In this reads, first, read respectively preceding view data DIR(i) and view data DIG(i), be stored in the storer of the employing input pattern in image data memory 410,420.Then, from view data input and output portion 520 export by with view data DIR(i) the view data DIB(i that transmits of identical view data line 710), make it be back to the above-mentioned view data terminal of view data input and output portion 520 by return wire 730.Using to this view data with the input of terminal the view data DIB(i as blueness use) be stored in the storer of the employing input pattern in image data memory 410,420.Like this, the time of two pictures of process LED display unit 102, thus, the processing of reading of the view data DI of LED display unit 103 finishes.
Next, in three LED display units 102 and LED display unit 103, synchronously indicate according to the demonstration based on control signal CI, in each LED display part 200, show the image of regulation.So, in LED display device 111, in the viewing area of growing crosswise, show desired word, image.Then, replace requirement according to the picture from control signal CI, in three LED display units 102 and LED display unit 103, the pattern that storer switch control portion 610 is carried out image data memory 410,420 is switched, and continues reading and the Graphics Processing of LED display part 200 of view data DI simultaneously.
In the present embodiment, in three LED display units 102, show the image having take the red and green form and aspect as primary colors.On the other hand, LED display unit 103 shows the image having take red, green, blueness as the form and aspect of primary colors.In three LED display units 102 and LED display unit 103, adopt the indication palette numbering PN same with LED display unit 101 and show that look numbering DN's is corresponding.
According to this embodiment, for example, in the case of LED display device 111 being applied in the train destination display device in station, place name, the frequency etc. of destination, as the Word message that adopts more simple form and aspect, can be shown by LED display unit 102.On the other hand, representing that the word of train classification adopts the demonstration of enriching form and aspect that has of being undertaken by LED display unit 103, is which kind of train is such with regard to having advantages of that passenger can intuitively and promptly understand shown train like this.
Although LED display device 111 can partly show the so-called image that approaches full-color form and aspect, it is enough that the radical of the LED display unit 102 view data line 710 that mutual cascade is connected with LED display unit 103 is 2.At this, adopting in the equipment of the LED display device with the pixel that comprises two primary colors, be replaced as in the situation of LED display device 111 in order to give its abundanter expressive force, can omit significantly numerous and diverse operation of wiring again etc.Particularly by adopting only to the 520 input image data DI of view data input and output portion of a LED display unit 102 and the structure of control signal CI, only use the signal wire in the equipment of the LED display device that adopts above-mentioned having to comprise the pixel of two primary colors, just can transmit signal to LED display device 111., have advantages of that not need to lay new signal wire such.In addition, the controller 800 in present embodiment, can intactly use the controller using in the equipment of the LED display device with the pixel that comprises two primary colors adopting.Therefore, there is the existing device of the LED display device of the pixel that comprises two primary colors for employing, as long as by its part being replaced to the operation of LED display device 111, just can build the LED display system 121 that can partly show the image that approaches full-color form and aspect.
In addition,, as the variation of LED display device 111, also can comprise multiple LED display units 103.
Figure 13 represents other examples of LED display device involved in the present invention.The LED display device 112 of present embodiment comprises four LED display units 104 that form based on the 4th embodiment of the present invention.Four adjacent LED display units 104 are connected with 720 cascades of control signal line with line 710 by three view data each other.
As shown in figure 14, LED display unit 104 comprises: red with drive division 310, green with drive division 320, blue with drive division 330, each pixel 210 as shown in Figure 2, is made up of three LED illuminating part 220R, 220G, 220B.In LED display unit 104, carry out the Graphics Processing same with LED display unit 101.For each other synchronous of each LED display unit 104, can suitably use the address information being contained in the control signal CI for example adopting in LED display device 111.
According to this embodiment, can, in the situation that not making system architecture complicated, show and there is the more image of polychrome number expeditiously.
LED display unit, LED display device and LED display system involved in the present invention are not limited to above-mentioned embodiment.The concrete structure of the various piece of LED display unit, LED display device and LED display system involved in the present invention can freely carry out various changes in design.
For example, as shown in Fig. 9 and Figure 13, represented multiple LED display units to be configured to the example of row, still, the present invention is not limited to this, more than also can being configured to two row.In the case, multiple LED display unit also can adopt tandem (series connection) other in cascade (cascade) to connect.For example, the structure that adopts last first LED display unit of LED display unit 2 and secondary series of first row to be connected.So just can form wide up and down display.
In addition, also illustrated that indicating palette numbering is the example of 1 bit and 3 bits according to each of LED illuminating part, but showed chromatic number preferably more than 3 bits.For example, can be also each 6 bits of RGB.Thus, can carry out the demonstration of 262,144 looks.In order successfully to show image, send the view data of 6 bits by serial communication, therefore, clock frequency becomes 5MHz～10MHz.In the prior art, for example carry out full-color demonstration with 1MHz left and right by parallel communications, still, in structure of the present invention, clock frequency becomes 6 times (in the situation of 3 bits, being 3 times), still, is also controlled in the scope of 5MHz～10MHz.However, also can show 262,144 looks in the situation that chromatic number is for example 6 bits, be the colorful demonstration of what is called of 512 looks in the situation that of 3 bit.In the interface that communication under the frequency of this degree is used in prior art, also can realize fully.Therefore in the display device, existing in the prior art, assemble display unit of the present invention and also can move without any problems (colorful demonstration).Certainly, comprise double-colored LED illuminating part too in pixel, the numbering of indication palette is preferably more than 3 bits.
In addition, take view data with the radical of line only as 2, only as 3 are illustrated as example, but can be also more than 4.By increasing the view data radical of line, can expand can bulletin colour scope.
In addition, also illustrated that pixel comprises the example of the LED illuminating part of RG dichromatism or the LED illuminating part of RGB tri-looks, still, pixel also can comprise the LED illuminating part that also comprises yellow four looks that wait its allochromatic colour except RGB.Certainly, pixel also can comprise the LED illuminating part that the five colors are above.
Claims (26)
1. a LED display unit, is characterized in that, comprising:
LED display part, it possesses multiple pixels, and this pixel comprises the plural LED illuminating part that illuminant colour is different;
Drive division, it carries out the light emitting control of the described LED illuminating part of described LED display part;
Two image data memory cell, the view data that its storage shows at described LED display part respectively;
Image data input unit, it is transfused to described view data; With
Control part, its make described two image data memory cell any one be the input pattern writing from the described view data of described image data input unit, and make described two image data memory cell another for reading the output mode of described view data.
2. LED display unit as claimed in claim 1, is characterized in that:
Described multiple pixel is rectangular configuration.
3. LED display unit as claimed in claim 1 or 2, is characterized in that:
Described pixel comprises at least three described LED illuminating parts.
4. LED display unit as claimed in claim 3, is characterized in that:
Described at least three LED illuminating parts comprise: the LED illuminating part of the LED illuminating part of burn red, the LED illuminating part of glow green and the coloured light that turns blue.
5. LED display unit as claimed in claim 4, is characterized in that:
At least one of described three LED illuminating parts comprises plural LED chip.
6. the LED display unit as described in any one in claim 1 to 5, is characterized in that:
Described view data comprises with respect to described each pixel the light-emitting data being made up of many bits.
7. LED display unit as claimed in claim 6, is characterized in that, also comprises:
Make multiple demonstration look numberings number corresponding demonstration look alignment processing portion with multiple indication palettes,
Described multiple demonstration look numbering has respectively the luminosity of the regulation of described each LED illuminating part of described each pixel with respect to described drive division,
Described multiple indication palette numbering is included in described view data, and the quantity of described multiple indication palette numberings is fewer than the quantity of described multiple demonstration look numberings.
8. LED display unit as claimed in claim 7, is characterized in that:
Described multiple indication palette numbering, according to described each LED illuminating part each, is made up of 1 bit.
9. LED display unit as claimed in claim 8, is characterized in that:
Described multiple indication palette numbering, according to described each LED illuminating part each, is made up of above 3 bits.
10. the LED display unit as described in any one in claim 7 to 9, is characterized in that:
Described multiple demonstration look numbering, according to described each LED each, is made up of 8 bits.
11. 1 kinds of LED display device, is characterized in that:
It comprises multiple LED display unit claimed in claim 1,
Described each LED display device possesses the view data efferent of output from the described view data of described image data input unit,
Described multiple LED display device adopts cascade to connect.
12. LED display device as claimed in claim 11, is characterized in that:
The input and output of described view data, carry out with the clock frequency of 5MHz～10MHz.
13. LED display device as claimed in claim 12, is characterized in that:
The described image data input unit of adjacent described LED display unit is connected with described view data efferent.
14. LED display device as described in any one in claim 11 to 13, is characterized in that:
Described multiple LED display unit comprises: described pixel only comprises the LED display unit of two described LED illuminating parts.
15. LED display device as claimed in claim 14, is characterized in that:
Described pixel in described multiple LED display unit only comprises the LED display unit of two described LED illuminating parts, at described image data input unit and described view data efferent, is only connected with two view data lines.
16. LED display device as described in any one in claim 11 to 15, is characterized in that:
Described multiple LED display unit comprises: described pixel only comprises the LED display unit of three described LED illuminating parts.
17. LED display device as claimed in claim 16, is characterized in that:
Described pixel in described multiple LED display unit only comprises the LED display unit of three described LED illuminating parts, at described image data input unit and described view data efferent, is only connected with three view data lines.
18. LED display device as described in any one in claim 11 to 13, is characterized in that:
Described multiple LED display unit comprises: described pixel only comprises the LED display unit of two described LED illuminating parts, and described pixel only comprises the LED display unit of three described LED illuminating parts.
19. LED display device as claimed in claim 18, is characterized in that:
The described view data showing in described multiple LED display units is all input to the only described image data input unit of LED display unit described in any one in the described LED display unit that described pixel only comprises two described LED illuminating parts.
20. LED display device as described in claim 18 or 19, is characterized in that:
Described pixel in described multiple LED display unit only comprises the LED display unit of three described LED illuminating parts, possesses the return wire being connected with described view data efferent and described image input part.
21. LED display device as described in any one in claim 16 to 20, is characterized in that:
The described only described LED illuminating part of three comprises: the LED illuminating part of the LED illuminating part of burn red, the LED illuminating part of glow green and the coloured light that turns blue.
22. LED display device as described in any one in claim 16 to 21, is characterized in that:
Only comprise the described view data of the LED display unit of three described LED illuminating parts for the described pixel in described multiple LED display units, with respect to described each pixel, comprise the light-emitting data being formed by many bits.
23. LED display device as claimed in claim 22, is characterized in that:
Described multiple LED display unit also possesses the look of demonstration alignment processing portion, and it makes multiple demonstration look numberings corresponding with multiple indication palette numberings,
Described multiple demonstration look numbering has respectively the luminosity of the regulation of described each LED illuminating part of described each pixel with respect to described drive division,
Described multiple indication palette numbering is included in described view data, and the quantity of described multiple indication palette numberings is fewer than the quantity of described multiple demonstration look numberings.
24. LED display device as claimed in claim 23, is characterized in that:
Described multiple indication palette numbering, according to described each LED illuminating part each, is made up of above 3 bits.
25. LED display device as described in claim 23 or 24, is characterized in that:
Described multiple demonstration look numbering, according to described each LED illuminating part each, is made up of 8 bits.
26. 1 kinds of LED display systems, is characterized in that, comprising:
LED display device described in claim 19; With
Only comprise to described pixel in the described LED display unit of two described LED illuminating parts only described in any one the described image data input unit of LED display unit input the only controller of of described view data.
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| JP2012-262848 | 2012-11-30 | ||
| JP2012262848 | 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 true CN103854608A (en) | 2014-06-11 |
| CN103854608B CN103854608B (en) | 2018-10-02 |
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| CN103854608B (en) | 2018-10-02 |
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