CN201159981Y

CN201159981Y - Scanning type LED display unit

Info

Publication number: CN201159981Y
Application number: CNU200820004619XU
Authority: CN
Inventors: 商松
Original assignee: Beijing Jushu Digital Technology Development Co Ltd
Current assignee: Shenzhen Zhongqing Micro Technology Development Co Ltd
Priority date: 2007-02-15
Filing date: 2008-01-24
Publication date: 2008-12-03
Anticipated expiration: 2018-01-24
Also published as: CN101246669B; CN101246669A

Abstract

The utility model relates to a scanning type LED display unit, which comprises: a display module including a plurality of pixels; a control module outputting switch control signals and suction current control signals; and a driving module receiving operating voltage, the switch control signals and the suction current control signals. Wherein, each pixel is composed of at least two LED groups, anodes of each LED group are loaded with operating voltage sequentially, and cathodes in the same LED group implement the current suction simultaneously, thereby different LED groups are illumined sequentially. The visual stability is thereby improved after different LED groups are illumined sequentially.

Description

Scanning type LED display unit

[technical field]

The utility model relates to a kind of LED display system, relates in particular to a kind of scanning type LED display unit.

[background technology]

At present, the LED display device is according to showing that control mode generally can be divided into static state and two kinds of scannings.The static demonstration all controlled separately by hardware each LED in the LED electronic display with exactlying, and all LED while of whole LED display screen is controlled.This mode great advantage is that program design is simple, and the picture flicker free.But there is fatal shortcoming in this design: the circuit complexity, and the hardware utilization factor is low, and cost is huge.

And along with the progress of LED manufacturing process, the brightness of LED is significantly improved, and LED display more and more adopts dynamic scan to realize showing at present.

As shown in figure 33, existing exemplary scanning type LED display device 30 generally comprises line driver 31, row driver 32 and some arranged pixels 33 that is.Wherein each pixel 33 comprises red LED, green LED and blue led.The LED of all different colors generally is divided into several rows H1, H2...Hn and some row L1, L2...Lm.Wherein each row LED and 31 connections of corresponding line driver, the output terminal connection that all LED and row driver 32 are corresponding.

If will show a frame picture, the line driver 31 of the first row LED correspondence is received control signal Hs1 and is driven, thereby loads task driven voltage VCC at the positive pole of the first row LED.This row driver 32 is received row control signal Ls, thereby lights the first row LED, by this row control signal Ls, thereby determines which LED is luminous among this first row LED, and which LED is not luminous.This meaning of lighting is that the LED of delegation is loaded simultaneously and is controlled by row driver 32, as for whether luminous, need see whether the data-signal among the row control signal Ls needs those LED among this row LED luminous.By same mode, successively all row LED have been lighted, promptly provided the picture of a frame.

Yet this scan type LED display unit 33 major defects are: because all LED are with the scanning of advancing, and each row LED lights successively at interval, so lighting of the LED in each pixel is the interval.And this interlude is long more, and is intense poor to the thorn of eye, thereby causes the reduction of display frame stability, thereby causes the reduction of vision stability.In order to shorten this interval, a kind of effective measures are the sweep frequencies that improve scan type LED display unit 33, yet the raising of sweep frequency, the circuit that also will cause driving, control this pixel 33 is more complicated, and too high sweep frequency will increase the noise of this circuit, this noise also will influence the operate as normal of this circuit conversely, thereby reduce the effect that shows.

In view of this, provide a kind of scan type LED display unit that overcomes above defective to become the technical task that present urgent need solves.

[summary of the invention]

The purpose of this utility model is to provide a kind of scanning type LED display unit that can effectively improve vision stability.

For achieving the above object, the utility model provides a kind of scanning type LED display unit, comprises display module, and it comprises some pixels; Control module, output switch control signal and suction flow control signals; Driver module receives operating voltage, this switch controlling signal and should inhale flow control signals; Each pixel is made up of at least two group LED, the positive pole of every group of LED is loaded operating voltage successively, and the negative pole of LED is inhaled stream simultaneously on the same group, thereby makes not LED on the same group light successively, make not LED on the same group light successively, thereby improve the stability of vision.

Compared with prior art, the LED that controls in each pixel not on the same group of the utility model scanning type LED display unit lights successively.For luminous pixel, on the same group LED unit is not luminous continuously to make it, constantly stimulates people's visual perception, thereby can effectively improve the stability of display frame.

[description of drawings]

Fig. 1 is the schematic construction block diagram of the utility model scanning type LED display unit.

Fig. 2 is the circuit theory synoptic diagram that is connected with the MCU of Memory in the scanning type LED display unit.

Fig. 3 is the further schematic construction block diagram of the utility model scanning type LED display unit.

Fig. 4 is the synoptic diagram of arranging that each pixel comprises 2 two kinds of color LED in the utility model first embodiment display module.

Fig. 5 is the partial circuit principle schematic that each pixel of the utility model first embodiment comprises 2 two kinds of color LED.

Fig. 6 is the switch controlling signal that MCU produces among the utility model first embodiment and inhales the sequential synoptic diagram of flow control signals.

Fig. 7 is the synoptic diagram of arranging that each pixel comprises 3 three kinds of color LED in the utility model second embodiment display module.

Fig. 8 is that the utility model second embodiment is to the synoptic diagram after LED divides into groups among Fig. 7.

Fig. 9 is the partial circuit principle schematic that each pixel of the utility model second embodiment comprises 3 three kinds of color LED.

Figure 10 is the switch controlling signal that MCU produces among the utility model second embodiment and inhales flow control signals sequential synoptic diagram.

Figure 11 is the synoptic diagram of arranging that each pixel comprises 4 three kinds of color LED in the utility model the 3rd embodiment display module.

Figure 12 is the synoptic diagram after the utility model the 3rd embodiment divides into groups to the LED among Figure 11.

Figure 13 is the partial circuit principle schematic that each pixel of the utility model the 3rd embodiment comprises 4 three kinds of color LED.

Figure 14 is the synoptic diagram after the utility model the 3rd embodiment another kind divides into groups to the LED among Figure 11.

Partial circuit principle schematic when Figure 15 is two red LED series connection of the utility model the 3rd embodiment.

Partial circuit principle schematic when Figure 16 is two red LED parallel connections of the utility model the 3rd embodiment.

Figure 17 is that each pixel of the utility model the 4th embodiment comprises in 4 three kinds of color LED and each pixel LED different display modules synoptic diagram of arranging of arranging.

Figure 18 is the partial circuit principle schematic after the utility model the 4th embodiment divides into groups to the LED among Figure 17.

Figure 19 is the partial circuit principle schematic after the utility model the 4th embodiment another kind divides into groups to the LED among Figure 17.

Figure 20 is the partial circuit principle schematic when not comprising code translator in the utility model the 5th embodiment display unit.

Figure 21 is the switch controlling signal sequential synoptic diagram that MCU produces among the utility model the 5th embodiment.

Figure 22 is the synoptic diagram of arranging that each pixel of the utility model the 6th embodiment has 9 LED.

Figure 23 is each pixel of the 6th embodiment partial circuit principle schematic when 9 LED are arranged.

Figure 24 is the synoptic diagram of arranging that each pixel has 25 LED among the utility model the 6th embodiment.

Figure 25 is each pixel of the utility model the 6th embodiment partial circuit principle schematic when 25 LED are arranged.

Figure 26 is the synoptic diagram of arranging that each pixel comprises 4 four kinds of color LED in the utility model the 7th embodiment display module.

Figure 27 is the synoptic diagram after the utility model the 7th embodiment divides into groups to the LED among Figure 26.

Figure 28 is the partial circuit principle schematic that each pixel of the utility model the 7th embodiment comprises 4 four kinds of color LED.

Figure 29 is the switch controlling signal that MCU produces among the utility model the 7th embodiment and inhales flow control signals sequential synoptic diagram.

Figure 30 is that each pixel of the utility model the 7th embodiment comprises 5 four kinds of color LED, wherein the partial circuit principle schematic of 2 red LED series connection.

Figure 31 is that each pixel of the utility model the 7th embodiment comprises 5 four kinds of color LED, wherein the partial circuit principle schematic of 2 red LED parallel connections.

Figure 32 is the partial circuit principle schematic that each pixel of the utility model the 7th embodiment comprises 6 four kinds of color LED.

Figure 33 is existing scan type LED display unit partial circuit principle schematic.

[embodiment]

Below in conjunction with accompanying drawing the utility model is elaborated.

The utility model embodiment scanning type LED display unit is mainly used in information such as the image that receives and show various peripheral hardwares (as computer, player etc.) and pass over, literal, but also is not limited thereto.

As shown in Figure 1, in the utility model first embodiment, led display unit 10 mainly comprises control device 11, drive unit 12 and display module 13.

This control device 11 is mainly used in generation switch controlling signal Hsel and inhales flow control signals Rs, controls respectively and driving switch device 121 and suction stream device 122, to allow same group LED light synchronously successively, as Fig. 1, Fig. 2 and shown in Figure 3.In the present embodiment, this control device 11 comprises MCU, as the MC68HC908LJ12 of Motorola Inc. (Motorola).This MCU with information processings such as image, literal after, output switch control signal and inhale flow control signals below describes in detail.

In addition, this control device 11 also can be FPGA (field programmable gate array), for example ALETRA company model is provided is the FPGA of EP1C6Q208.This FPGA passes through the editor to its internal logic module, thereby also can be with after the information processings such as image, literal, switch controlling signal Hsel that output is identical with this MCU output and suction flow control signals Rs.And the FPGA of other manufacturers produce also can realize above-mentioned functions through same editor.

This control device 11 also can connect a memory storage 14, deposits information such as this image, literal.In the present embodiment, this memory storage 14 can be Memory (storer), the SDRAM of 64 megabyte for example, it can be that the model that ISSI company provides is SDRAM of HY57V643220 etc. for the SDRAM of K4S643232, the model that Winbond company provides for the SDRAM of W986432, the model that HYNIX company provides for the SDRAM of IS42S32200, the model that SamsungElectronics company provides.

This drive unit 12 comprises some switchgears 121 and inhales stream device 122.In the utility model embodiment, these some switchgears are identical, can be the FDS4953 chip.Two input pins of this switchgear are connected with the output terminal of power supply VCC and corresponding switch controlling signal Hsel respectively.Among each embodiment of the utility model, operating voltage VCC=5 volt.The output terminal of this device that opens the light is loaded into the positive pole of corresponding group LED with outputting drive voltage, thereby realizes loading.Certainly, this switchgear is not limited in this, also can be technical field personnel know under other the on-off circuit or the chip of other types; Also can selection group gating signal the chip or the circuit of gating when being high.

This suction stream device is connected with the output terminal of this suction flow control signals Rs.Among each embodiment of the utility model, this suction stream device can be the MBI5026 chip, also can be the chips such as ZQ9722, ZQ9729 chip of Beijing Zhongqing Micro-digit Equipment Development Co., Ltd.Certainly, this suction stream device is not limited in this, also can be technical field personnel know under other the on-off circuit or the chip of other types.

This display module 13 comprises some pixels, and each pixel is made up of a plurality of LED, and these some pixels are arranged, according to the actual displayed needs, also can be other forms and arranges.And this pixel also can be arranged on some cell boards (as the element circuit plate) as required, then some cell boards is spliced into whole large-size screen monitors.According to the structure of display screen, these some pixels become arranged and are arranged in the two dimensional surface, also can be in three-dimensional or hyperspace; These some pixels also can only be arranged on the substrate.The layout that these some pixels are concrete can be decided according to concrete needs, application.

In the present embodiment, each pixel comprises two LED, and promptly red LED and green LED as shown in Figure 4, can certainly be red LED and blue led, or can also comprise the LED that a plurality of colors are identical or different as required, describe in detail in following examples.

As shown in Figure 5, in the present embodiment, the LED in the pixel is divided into two groups, can divides into groups according to the color of LED, also can divide into groups according to the physical location of LED in the pixel, the title of two groups is respectively C1, C2.The C1 group is red LED, and the C2 group is green LED.The positive pole of C1, C2 group LED is connected with

switchgear

1211,1212 respectively, and an input end of this

switchgear

1211,1212 is connected with power supply VCC simultaneously.The negative pole of LED in each pixel is connected with suction stream device 1221 respectively.

As Fig. 2 and shown in Figure 6, MCU generates switch controlling signal Hsel and inhales flow control signals Rs.This switch controlling signal Hsel comprises two group selection signal Hsel0, Hsel1, and wherein the output terminal of this group selection signal connects with

corresponding switchgear

1211,1212 respectively, controls the Push And Release of this switchgear 1211,1212.This suction flow control signals Rs comprises clock signal C lk, load signal Load, enable signal En and data-signal Data, these signals will be controlled and inhale stream device 1221, so that after a certain group of LED is loaded, it is luminous to control among all this group LED those, and those are not luminous, thereby information such as the figure of demonstration expectation, literal below describe in detail on display unit 13.

As shown in Figure 6, these two group selection signal Hsel0, Hsel1 can only have one to be low level simultaneously, when a certain group selection signal such as Hsel0 level are low, then select this switchgear 1211 to open, thereby, be carried in the positive pole of all C1 group LED at the output terminal outputting drive voltage of switchgear 1211.Equally, when the Hsel1 level when low, then load all C2 group LED.Thereby realize loading successively this C1 group LED and C2 group LED, allow in each pixel not LED on the same group light continuously successively, continued stimulus people's eyes, thus improve the stability of vision.

In addition, this MCU also inhales flow control signals Rs to the output of LED on the same group that should be loaded.Inhale among the flow control signals Rs at this, data-signal Data moves on to this suction stream device 1221 along with clock signal C lk goes here and there synchronously.Specifically, as shown in Figure 6, in basic cycle Tc, arranged several clock period, the number of concrete clock period is following to be described in detail, below is that example is elaborated with 16 clock period.Clock period of every interval, LED data b it will go here and there synchronously and move on to this suction stream device 1221, and when through 16 clock period, the LED data that device 1221 will latch 16 bit, i.e. bit1, bit2......bit16 are flowed in this suctions.The value of each LED data b it1, bit2......bit16 is 0 or 1, and when being 0, corresponding LED will be not luminous; When being 1, corresponding LED below describes in detail luminous.

Because present embodiment has 2p * q LED, therefore through behind 2p * q the clock, each LED obtains a data bit.But,, therefore only need to provide the data b it of the LED that loads corresponding group to get final product for each pixel because each pixel has only one group LED to need this data b it in a basic cycle Tc; Just should inhale stream device 1221 output terminal corresponding with these group data is connected with the negative pole of all LED in the respective pixel.Can simplify the quantity of inhaling stream device output data bit so greatly.Therefore through after only needing p * q clock, each pixel obtains a data bit, thus each LED on the same group that is loaded of may command light, luminous.

As shown in Figure 6, when process p * q clock, 16 clocks as previously discussed respond this load signal Load and enable signal En, and this suction stream device 129 is lighted the LED on the same group that this is loaded, and the LED that organizes as C1 is lighted.And whether the LED that controls the C1 group that is loaded according to the value of data b it1, the bit2......bit16 of the LED of C1 group is luminous, and when data b it is 0, the LED in the respective pixel will be not luminous; When data b it is 1, in the respective pixel this on the same group LED with luminous.

After the LED of this C1 group was lighted, the LED of C2 group lighted in an identical manner, luminous, thereby realized in each pixel that not LED on the same group lights successively.Therefore for luminous pixel, not on the same group the LED in this light emitting pixel is luminous successively, stimulates people's visual perception, thereby can effectively improve the stability of display frame vision.

In addition, in the present embodiment, as shown in Figure 4, this p * q pixel is arranged in the capable and q row of p, and on the direction of row and column, LED equidistantly arranges, and helps the heat radiation of LED.

The difference of the utility model second embodiment and first embodiment is that each pixel comprises three LED, i.e. red LED, green LED and blue led.LED's arranges as shown in Figure 7 in the pixel.LED in the pixel is divided into three groups because each one of the LED of three kinds of colors, and in each pixel LED arrange identically, therefore according to the color of LED or the physical location of LED divides into groups, group result is all the same.The title of three groups is respectively C1, C2, C3, as shown in Figure 8.The C1 group is red LED, and the C2 group is green LED, and the C3 group is blue led.

As shown in Figure 9.The positive pole of C1, C2, C3 group LED is connected with

switchgear

1211,1212,1213 respectively, and an input end of this

switchgear

1211,1212,1213 is connected with power supply VCC simultaneously.This scanning type LED display unit also comprises a code translator 15 in the present embodiment, and for example existing two or four code translators can advance the group selection signal that control module 11 generates decoding back generation group gating signal.In the present embodiment, this two or four code translator can be realized with 74HC139,74HC138,74HC154 code translator that Philips company provides.These two group selection signal Hsel0, Hsel1 organize gating signal SelC1, SelC2, SelC3 through a code translator 15 thereby produce three.

As shown in figure 10, be the sequential chart of each signal in the present embodiment,, then select this switchgear 1211 to open when a certain group of gating signal such as SelC1 level are low, thereby, be carried in the positive pole of all C1 group LED at the output terminal outputting drive voltage of switchgear 1211.Equally, when SelC2 or SelC3 level when low, then load all C2 group LED or C3 group LED.Thereby realize loading successively this C1 group LED, C2 group LED and C3 group LED.This second control signal Rs comprises clock signal C lk, load signal Load, enable signal En and data-signal Data, these signals will be controlled and inhale stream device 1221, so that after a certain group of LED is loaded, control among all this group LED that those are luminous, and those are not luminous.

In the present embodiment, LED be expert at and column direction on evenly distributed, not only help the heat radiation of LED, also help the realization of virtual pixel.

Among the utility model the 3rd embodiment, each pixel arrangement in the display module 13 has 4 LED as shown in figure 11 in each pixel, comprising two red LED, and a green LED and a blue led.Position according to LED in each pixel is divided into four groups with LED: the red LED in the upper left corner is the C1 group, and the green LED in the upper right corner is the C2 group, and the blue led in the lower left corner is the C3 group, and the red LED in the lower right corner is the C4 group, as shown in figure 12.The positive pole of C1, C2, C3, C4 group LED is connected with switchgear 121,122,123,124 respectively, and an input end of this switchgear 121,122,123,124 is connected with operating voltage VCC simultaneously, as shown in figure 13.

In the present embodiment, also the LED in each pixel can be divided into three groups, two red LED are divided at same group, and the red LED in the upper left corner and the lower right corner is the C1 group, and the green LED in the upper right corner is the C2 group, and the blue led in the lower left corner is the C3 group, as shown in figure 14.Wherein, two homochromy LED are connected in series, and as shown in figure 15, two homochromy LED also can be connected in parallel, as shown in figure 16.The present embodiment principle of work is identical with first embodiment, does not repeat them here.

Because the critical driving voltage of red LED is lower, is about 1.8～2.2 volts, even therefore two red LED are connected in series, driving voltage also can drive this two red LED.And, the lighting of this two red LED, luminous require identical, therefore, data b it that can shared correspondence.Positive pole one end of two red LED that therefore should series connection connects with corresponding switchgear 1211, and negative pole and suction are flowed the output terminal that 1221 pairs in device should data and be connected, and can realize equally also in each pixel that not LED unit on the same group lights successively.Critical driving voltage green and blue led is higher, is 2.5～3.2 volts, under the situation that driving voltage allows, is not limited to the red LED series connection, and other colors LED also can connect; And in the bigger situation of driving voltage, more homochromy LED can connect.

In the present embodiment, operating voltage VCC=5 volt, therefore 2 red LED of same group can be cascaded in each pixel, if but same group has the high LED of two or more critical driving voltages, as green LED or blue led, need to select mode in parallel to connect, positive pole one end of the LED that this is in parallel connects with corresponding switchgear, negative pole with inhale the stream device output terminal that should data be connected, principle is identical with above-mentioned series connection, can realize that equally also the LED unit of different colours in each pixel is lighted successively.

Equally, in the present embodiment, all single led being expert at and the arrangement of column direction equal intervals, and line-spacing is identical with the row distance, improves the LED radiating effect; And this evenly distributed LED helps the realization of virtual pixel.

Figure 17 and Figure 18 are the 4th embodiment of the present utility model.In the present embodiment, the LED that comprises in each pixel of luminescence unit is identical, all is two red LED, a green LED and a blue led, but the difference of arranging of LED wherein, as shown in figure 17.We divide into groups according to the physical location of LED, comprise the LED of different colours in every group, as shown in figure 18, among the data-signal Data of MCU output, should comprise the data of every group of LED modules with different colors.The principle of work of this embodiment is identical with embodiment three, four and five.Needn't give unnecessary details at this.

In the present embodiment, also can divide into groups according to the color of LED, shown in Figure 19, the LED of color of the same race is divided into one group.The positive pole of all red LED is connected to switchgear 1213, and the positive pole of all green LED is connected to switchgear 1212, and the positive pole of all blue leds is connected to switchgear 1211.Like this, the data-signal Data of MCU output is identical with the data-signal Data of MCU output among the 3rd embodiment.

Among the utility model the 5th embodiment, the pixel arrangement in the display module 11 as shown in figure 12, and is identical with the 3rd embodiment.In the present embodiment, this MCU directly produces group selection signal HselC1, HselC2 and HselC3, comes

gauge tap device

1211,1212,1213 respectively, thereby can omit code translator 15 among the 3rd embodiment, as shown in figure 20.The sequential of this group selection signal HselC1, HselC2 and HselC3 can directly be exported by this MCU as shown in figure 21, and it is identical with the effect of group gating signal SelC1, SelC2, SelC3 among above-mentioned three embodiment, needn't give unnecessary details at this.In the present embodiment, the LED of two redness is one group, and is connected in series.

In the utility model,, can comprise more LED in each pixel for improving uniformity of chromaticity and the brightness uniformity that shows.

In the 6th embodiment of the present utility model, each pixel comprises nine LED: three red LED, three green LED and three blue leds.LED's arranges as shown in figure 22 in each pixel.Position according to LED is divided into three groups, and three LED of first row in each pixel are first group, and three LED of second row are second group, and three LED of the third line are the 3rd group, and on the same group three LED are connected in parallel in each pixel, as shown in figure 23.Owing to comprise the LED of different colours in every group, so among the data-signal Data of this MCU output, should comprise the data of every group of LED modules with different colors.

In the present embodiment, each pixel can also comprise 25 LED: ten red LED, ten green LED and five blue leds.LED's arranges as shown in figure 24 in each pixel.Position according to LED is divided into five groups, and five LED of each row are one group, five LED on the same group in each pixel, and wherein two red LED are connected in series, and two green LED are connected in parallel, as shown in figure 24.The positive pole of C1, C2, C3, C4, C5 group LED is connected with

switchgear

1211,1212,1213,1214,1215 respectively, and an input end of this

switchgear

1211,1212,1213,1214,1215 is connected with operating voltage VCC simultaneously.

For improving the luminosity of each pixel, can in pixel, add White LED.Among the utility model the 7th embodiment, each pixel comprises four LED: a red LED, and a green LED, a blue led and a White LED, lamp arranges as shown in figure 26 in the display module 11.LED in each pixel is divided into four groups according to color, as shown in figure 27.The positive pole of C1, C2, C3, C4 group LED is connected with

switchgear

1211,1212,1213,1214 respectively, and an input end of this

switchgear

1211,1212,1213,1214 is connected with operating voltage VCC simultaneously, and its physical circuit figure as shown in figure 28.

The switch controlling signal Hsel of this MCU output comprises two group selection signal Hsel0, Hsel1, its waveform as shown in figure 29, thereby exportable four group gating signal SelC1, SeC2, SelC3, SelC4, these four group gating signals are identical with the principle of work of two group gating signal SelC1, SelC2 among first embodiment, promptly can only have simultaneously one to be low level, all the other then are high level.The output terminal of this group gating signal SelC4 is connected with corresponding switchgear 1214 with operating voltage VCC, and this switchgear 1214 is identical with

other switchgears

1211,1212,1213, needn't give unnecessary details at this.The output terminal of this switchgear 1214 is connected with the positive pole of the LED of all C4 group, and the negative pole of LED and suction are flowed the output terminal that 1221 pairs in device should color data and be connected in each pixel.

During work, this MCU handles the information that will show, and exports this switch controlling signal Hsel and this clock signal C lk, load signal Load, enable signal En and data-signal Data.These two group selection signal Hsel0, Hsel1 organize gating signal SelC1, SeC2, SelC3, SelC4 through code translator 15 thereby produce four.These four group gating signal SelC1, SeC2, SelC3, SelC4 can only have one to be low level simultaneously, and as SelC1, remaining SelC2, SelC3, SelC4 then are high level.For example, when SelC1 is low level, as mentioned above, the LED unit of all C1 groups will be loaded, and promptly be connected to driving voltage on its positive pole, thereby be loaded.And this MCU inhales flow control signals Rs to the output of LED on the same group that should be loaded, and it is identical with first embodiment, needn't give unnecessary details at this.

As mentioned above, when through 16 clocks, respond this load signal Load and enable signal En, this suction stream device 1221 is lighted the unit of LED on the same group that this is loaded, and the LED that organizes as C1 is lighted.And whether according to the data b it1 of the LED of C1 group, the value of bit2......bit16, it is luminous to control this group LED that is loaded, and when data b it is 0, the LED in the respective pixel will be not luminous; When data b it is 1, should organize LED in the respective pixel with luminous.

After the LED of this C1 group is lighted, the LED of other groups, as the LED of C2, C3, C4 group lighted successively in an identical manner, luminous (sequential chart as shown in figure 29), can realize equally also in each pixel that not LED unit on the same group lights successively.In addition, in the 11 embodiment, as shown in figure 27, this p * q pixel is arranged in the capable and q row of p, and on the direction of row and column, LED equidistantly arranges, and helps the heat radiation of LED.As optimal way, this line-spacing is identical with the row distance, thereby can further be beneficial to the heat radiation of LED; And this evenly distributed LED helps the realization of virtual pixel.In the present embodiment, each pixel comprises five LED: two red LED, a green LED, a blue led and a White LED.The LED of two redness is divided into one group in each pixel, is connected in series or is connected in parallel, as Figure 30 or shown in Figure 31.Each pixel also can comprise six LED: two red LED, two green LED, a blue led and a White LED.Shown in figure 32, the LED of two redness is divided into one group in each pixel, is connected in series; Two green LED are divided into one group, are connected in parallel.Concrete principle of work is identical with the principle of work of above-mentioned four four kinds of color LED, does not repeat them here.

Although the utility model is disclosed by above embodiment, but scope of the present utility model is not limited thereto, under the condition that does not depart from the utility model design, more than each element can replace with the similar or equivalent element that affiliated technical field personnel understand, switchgear, suction stream device, code translator and control device can be finished by FPGA is integrated among for example above embodiment, also promptly are made in the FPGA.

Claims

1. scanning type LED display unit, it comprises:

Display module, it comprises some pixels;

Control device, output switch control signal and suction flow control signals;

Drive unit receives operating voltage, this switch controlling signal and should inhale flow control signals;

It is characterized in that: each pixel is made up of at least two group LED, and the positive pole of every group of LED is loaded operating voltage successively, and the negative pole of LED is inhaled stream simultaneously on the same group, thereby makes not LED on the same group light successively.

2. scanning type LED display unit as claimed in claim 1 is characterized in that: described drive unit comprises: some switchgears and at least one are inhaled the stream device,

This switchgear receives the switch controlling signal of operating voltage and the output of this control module, in described some pixels on the same group the positive pole of LED respectively with the connection of corresponding switchgear, the positive pole of every group of LED is loaded operating voltage successively;

This suction stream device comprises some control ends, and the negative pole of all LED is inhaled the corresponding control end of stream device with this respectively and connected in these some pixels, and this suctions is flowed after device receives the suction flow control signals that this control module exports, and the negative pole of LED is on the same group inhaled stream.

3. scanning type LED display unit as claimed in claim 2, it is characterized in that: described switch controlling signal comprises some groups of gating signals, these some groups of gating signals are input to corresponding switchgear respectively, allow correspondence organize the switchgear conducting of LED correspondence successively, operating voltage is passed through the positive pole that this switchgear is loaded into this correspondence group LED.

4. scanning type LED display unit as claimed in claim 2, it is characterized in that: described switch controlling signal comprises some group selection signals, this group selection signal is through code translator generation group gating signal, this group gating signal is input to corresponding switchgear respectively, allow correspondence organize the switchgear conducting of LED correspondence successively, operating voltage is passed through the positive pole that this switchgear is loaded into this correspondence group LED.

5. scanning type LED display unit as claimed in claim 2, it is characterized in that: described suction flow control signals comprises clock signal, load signal, enable signal and data-signal, when described corresponding group LED loads or afterwards, the data-signal that comprises the light-emitting data of described corresponding group LED synchronously moves on to this light-emitting data string described suction stream device by this clock signal, respond this load signal and enable signal, light described corresponding group LED.

6. scanning type LED display unit as claimed in claim 2 is characterized in that: the negative pole of all LED connects with a corresponding control end of described suction stream device in described each pixel.

7. as each described scanning type LED display unit in the claim 1 to 6, it is characterized in that: described some pixels become arranged and are arranged in the two dimensional surface.

8. as each described scanning type LED display unit in the claim 7, it is characterized in that: comprise having one group of LED that two or more LED constitute at least among the described two group LED at least;

These two or more LED are connected in parallel or are connected in series, and these two or more led colors are identical or different.

9. scanning type LED display unit as claimed in claim 8 is characterized in that: described each pixel comprises respectively with two red LED, a green LED, three groups of LED that blue led is formed, wherein two in parallel or series connection of red LED.

10. the scanning type LED display unit described in claim 7, it is characterized in that: every group of LED only comprises a LED among the described at least two group LED.

11. scanning type LED display unit as claimed in claim 10 is characterized in that: described two on the same group led color differences not.

12. scanning type LED display unit as claimed in claim 10 is characterized in that: described not on the same group the color of LED has nothing in common with each other, and led color on the same group is identical.

13. scanning type LED display unit as claimed in claim 12 is characterized in that: described each pixel comprises respectively with a red LED, a green LED, three groups of LED that blue led is formed.

14. scanning type LED display unit as claimed in claim 7 is characterized in that: the LED in described each pixel arranges according to unified physical location, and the physical location of LED that is arranged in each pixel among the described LED on the same group is identical.

15. scanning type LED display unit as claimed in claim 7 is characterized in that: the LED in described each pixel arranges according to unified physical location, is arranged in the physical location difference of the LED of two pixels among the described LED on the same group at least.

16. scanning type LED display unit as claimed in claim 7 is characterized in that: also comprise memory module, this memory module is connected with this control module, stores information to display.