CN105895009A

CN105895009A - Color LED display device

Info

Publication number: CN105895009A
Application number: CN201510021241.9A
Authority: CN
Inventors: 张谦
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-01-16
Filing date: 2015-01-16
Publication date: 2016-08-24

Abstract

A color LED display device comprises a plurality of voltage supply modules, wherein the voltage supply modules are connected with a plurality of light emitting units arranged in rows, and supplies power to the light emitting units; the plurality of light emitting units arranged in rows are divided into a plurality of display regions; each display region comprises at least two rows of the light emitting units, and is powered by one voltage supply module; and number of the light emitting units in one display region is an odd number while number of the light emitting units in the other display region is an even number in the two display regions corresponding to the two voltage supply modules which are connected by one wire arranged between modules. The color LED display device increases the flexibility of wiring, and provides the benefits such as adaptability, energy saving property and stability of voltage supply circuits in specific application occasions.

Description

A kind of color LED display device

Technical field

The present invention relates to a kind of color LED display device, refer in particular to possess multiple light-emitting component and formed The display device of array.

Background technology

Light-emitting diode display integrates many advantages such as lightweight, slimming and power consumption are low, therefore Demand at aspects such as such as outdoor large display promptly increases.Generally, light-emitting diode display is logical Crossing and combine multiple LED unit and constitute, this LED unit is joined by the light emitting diode being formed on substrate It is set to as rectangular.Additionally, at light-emitting diode display, arrange and can drive each light-emitting diodes respectively The drive circuit of pipe.Specifically, at light-emitting diode display, connect and each LED unit is passed respectively Each LED sending video data controls device, and these are to connect multiple and constitute a giant display If light-emitting diode display becomes large-scale, then the LED unit used increases, at large-scale LED In display, such as, use 490,000 LED unit of total of longitudinally 700 × horizontal 700.

The type of drive of light-emitting diode display generally uses dynamic driving mode.Such as by m × n dot matrix In the case of the LED unit constituted, it is positioned at the anode terminal of each light emitting diode (LED) of each row altogether Being connected to together a pressure-wire, the cathode terminal of each light emitting diode (LED) being positioned at each row is common Be connected to an electric current line.Then, by sequentially making the pressure-wire of m row become at both fixed cycles For conducting, show.Additionally, the switching of the pressure-wire of m row, can such as according to address signal, Carried out by decoding circuit.Just the existing LED display of light emitting diode is used to carry out above Illustrate, but, even at electric field illuminating display device, field emission type display device FED, liquid crystal etc., Can also be driven by same drive circuit or method.

But, in the display devices such as existing LED display, light be connected to selected During light emitting diode on pressure-wire, it is positioned on the pressure-wire under non-selected non-illuminating state being connected to Light emitting diode remain electric charge, when selecting this pressure-wire, have so-called generation due to time non-selection The electric charge that remained and the problem of unwanted currents caused.Due to the generation of this unwanted currents, become and make The light emitting diode that must control not carry out luminescence produces the wrong bright light of small luminescence or at display image Sufficient lightness etc. cannot be obtained and reduce the reason of display quality.This residual charge is not only luminous unit Part, even if being driven into as driving condition or the driven element of the parasitic capacitance of non-driven state having In also can produce, even such as also becoming problem in the voltage controlled elements such as liquid crystal indicator.This Outward, this residual charge not only produces at element body, is also being connected to the distribution etc. of element, produce and Remaining becomes stray capacitance, therefore, particularly has along with the distribution of large-scale display device etc. becomes the longest And make the tendency that residual charge also and then increases when distribution becomes the most, due to these residual charges The wrong bright light or the mistake that are caused show, mistake is driven into problem.

Such as, in the drive circuit of LED display through frequently with row cutting power tube, such as double P Channel metal-oxide-semiconductor field (Metal-Oxidc-Scmiconductor Field-Effect Transistor, initialism is MOSFET) 4953, include separate double P-channel fields effect inside it Should pipe MOSFET1, MOSFET2, there is ultralow conducting resistance, drive two display lines.Fig. 1 Show the situation in the horizontal drive circuit of 4953 LED displays being arranged on 1/4 scanning ranks sub-control, Wherein, horizontal drive circuit includes being provided with the row of binary weighting address and selects signal input part A0, A1 and mutually The coding chip 74HC138 of low effective row control line outfan Y0, Y1, Y2, Y3 of scolding, with And the double P-channel MOSFET4953 being connected with coding chip 74HC138, include two inside it solely That stand, P-channel field-effect transistor (PEFT) pipe MOSFET1, MOSFET2, outfan Y0 and field effect transistor The grid G 1 of the control foot 2 of MOSFET1, i.e. field effect transistor MOSFET1 connects, outfan Y1 Connect with the grid G 2 of the control foot 4 of field effect transistor MOSFET1, i.e. field effect transistor MOSFET1, Outfan Y2 and the control foot 2 of field effect transistor MOSFET2, the i.e. grid of field effect transistor MOSFET2 Pole G1 connects, outfan Y3 and the control foot 4 of field effect transistor MOSFET2, i.e. field effect transistor The grid G 2 of MOSFET2 connects, and 7,8 feet that field effect transistor MOSFET1 is connected are line output End H1,5,6 feet that field effect transistor MOSFET1 is connected are line outfan H2, field effect transistor MOSFET2 be connected 7,8 feet be line outfan H3, field effect transistor MOSFET2 be connected 5, 6 feet are line outfan H4, line outfan H1, H2, H3 and H4 respectively with LED display Show light emitting diode D1, D2, D3 and D4 on the row of concrete image anode connect, D1, D2, The negative electrode of D3 and D4 and constant-current LED drive integrated circult are (not shown in Fig. 1, for giving sending out of gating Optical diode provides electric current) it is connected.

Traditional power control circuit wiring in Fig. 1, needs coding chip 74HC138 by line of input Address is decoded.Coding chip such as 74HC138 is to all of control between power supply control chip simultaneously Driving signal link is large number of, and the wiring for pcb board adds complexity.

Residual charge not only produces at element body, is also being connected to the distribution etc. of element, produces and remaining Become stray capacitance, therefore, particularly have become more to grow along with the distribution of large-scale display device etc. and The tendency that residual charge also and then increases is made, owing to these residual charges are made when distribution becomes the most The wrong bright light or the mistake that become show, mistake is driven into problem.

Therefore, it is an object of the invention to provide a kind of shadow that can reduce and be caused due to aforementioned residual charge Ring and display device and the driving method thereof of high display quality can be realized.

Summary of the invention

The invention provides a kind of color LED display device, including: some voltage supplying modules, institute The multiple luminescence units stating voltage supplying module and be arranged in rows are connected, and supply power for；Clock signal cloth Line, is connected with the clock signal input terminal of voltage supplying module, to provide clock signal to supply mould to voltage Block；Input signal connects up, and is connected with the input signal end of at least one voltage supplying module, to provide defeated Enter signal to this voltage supplying module；Connecting up between voltage supplying module, it connects the voltage supply mould of upstream The voltage supplying module in block and downstream, the voltage supplying module of wherein said upstream includes the function electricity of inside Road, the input signal that the functional circuit of this inside is received processes, to form the voltage confession in downstream To the input signal of module, and transmit this signal by wiring between voltage supplying module；Wherein, described row Arrange rows of multiple luminescence unit and be divided into some viewing areas；Wherein, each viewing area include to Few two row luminescence units, each viewing area is powered by a voltage supplying module；Further, by a certain mould In two viewing areas corresponding to two voltage supplying modules that inter-block routing connects, a viewing area The number of the luminescence unit comprised is odd number, and a few days of the luminescence unit that another viewing area comprises is for even Number.

Preferably, described luminescence unit includes multiple LED.

Preferably, described luminescence unit includes redness, blueness, yellow sub-pixel.

Preferably, described voltage supplying module is integrated in the inside of LED drive chip.

One technical scheme of the present invention, it is provided that a kind of voltage control circuit, including: some voltages supply To module, described voltage supplying module is connected with the multiple luminescence units being arranged in rows, and supplies power for； Clock signal connect up, be connected with the clock signal input terminal of voltage supplying module, with provide clock signal to Voltage supplying module；Input signal connects up, and is connected with the input signal end of at least one voltage supplying module, To provide input to this voltage supplying module；Connecting up between voltage supplying module, it connects the electricity of upstream Pressure supplying module and the voltage supplying module in downstream, the voltage supplying module of wherein said upstream includes inside Functional circuit, the input signal that the functional circuit of this inside is received processes, to form downstream The input signal of voltage supplying module, and transmit this signal by wiring between voltage supplying module.

In another technical scheme of the present invention, the voltage supplying module of upstream and the voltage supply in downstream Module is adjacent.

In another technical scheme of the present invention, the voltage supplying module of upstream and the voltage supply in downstream Module is non-conterminous.

In another technical scheme of the present invention, the multiple luminescence units being arranged in row are divided into some Viewing area；Wherein, each viewing area includes at least two row luminescence units, and each viewing area is by one Individual voltage supplying module is powered.

In another technical scheme of the present invention, the multiple luminescence units being arranged in row are divided into some Viewing area；Wherein, each viewing area includes at least three row luminescence units, and each viewing area is by one Individual voltage supplying module is powered.

In another technical scheme of the present invention, a few days of the luminescence unit that adjacent viewing area comprises Differ.

In another technical scheme of the present invention, in two adjacent viewing areas, a viewing area The number of the luminescence unit comprised is odd number, and the number of the luminescence unit that another viewing area comprises is for even Number.

In another technical scheme of the present invention, the multiple luminescence units being arranged in row are divided into some Viewing area；Wherein, each viewing area includes at least two row luminescence units, and each viewing area is by one Individual voltage supplying module is powered；Further, the wiring of a certain intermodule two the voltage supplying module institutes connected Two corresponding viewing areas, the number of the luminescence unit that these two viewing areas comprise differs.

In another technical scheme of the present invention, the multiple luminescence units being arranged in row are divided into some Viewing area；Wherein, each viewing area includes at least two row luminescence units, and each viewing area is by one Individual voltage supplying module is powered；Further, the wiring of a certain intermodule two the voltage supplying module institutes connected In two corresponding viewing areas, the number of the luminescence unit that viewing area comprises is odd number, another The number of the luminescence unit that individual viewing area comprises is even number.

In another technical scheme of the present invention, the frequency of described clock signal is described input signal The integral multiple of frequency.

In another technical scheme of the present invention, the rising edge of described clock signal and described input signal Trailing edge overlap.

In another technical scheme of the present invention, the trailing edge of described clock signal and described input signal Trailing edge overlap.

In another technical scheme of the present invention, the trailing edge of described clock signal and described input signal Rising edge overlap.

In another technical scheme of the present invention, the rising edge of described clock signal or trailing edge can be adopted Sample is to described input signal.

In another technical scheme of the present invention, described input signal is line-sweep voltage signal.

In another technical scheme of the present invention, described luminescence unit is OLED, LED or Flied emission Display.

In another technical scheme of the present invention, described OLED or LED is matrix arrangement.

In another technical scheme of the present invention, the functional circuit of described inside be clock delay circuit or Displacement latch.

Another technical scheme of the present invention, it is provided that the wiring method of a kind of voltage control circuit, including, Arranging some voltage supplying modules, described voltage supplying module arranges rows of multiple luminescence units for giving Power supply；Clock signal wiring is set, to provide clock signal to voltage supplying module；Input signal is set Wiring, to provide input at least one voltage supplying module；Arrange and connect up between voltage supplying module, To connect voltage supplying module and the voltage supplying module in downstream of upstream, the voltage of wherein said upstream supplies To module by its internal functional circuit, the input signal received processes, to form downstream The input signal of voltage supplying module, and transmit this signal by wiring between voltage supplying module.

In another technical scheme of the present invention, described luminescence unit is OLED or LED.

In the present invention, residual charge refers to result from parasitic capacitance component on typical case is inherent electric charge Element, but, even parasitic capacitance component be not interior driven element, be also connected to this The distributions of element etc. or periphery, exist with the form of so-called stray capacitance and produce.The most so-called residual Electric charge is stayed to have along with the tendency that wiring lengths is the longest, distribution number more increases and increases, accordingly, because Wrong bright light that these residual charges are caused or mistake drive or mistake display, faulty operation also increase Add.

In the present invention, it is also possible to comprise for remaining produced by the connection wiring of this kind of driven element Electric charge removes, and can solve foregoing problems.Additionally, due to the driven element used and make Initial stage operation voltage or the initial stage of driving operation electricity is the most suitably being driven with the operational of this driven element Relation between stream etc., drives the most suitable residual charge quantitative change when starting to obtain different, but, removing During residual charge, if it is possible to remove residual charge and until be driven into the suitableeest this kind of aforementioned operation Till the quantity of electric charge required by when, and residual charge can be removed and become and make faulty operation or mistake If drive, mistake is luminous etc. is reduced to the degree till not there is the level of problem in practical use, then Become abundant, remove whole residual charges without certain.

As typical case, preferably in the case of such as light emitting diode, it is possible to all remove and one Until residual charge unrestrictedly becomes the degree of zero, it is possible to remove the residual charge of which kind of degree, Can be by suitably regulating required load or charging element, even commutator etc. and setting Meter and adjustment.

Additionally, the residual charge that the present invention is previously mentioned, certainly due to and driven element between relation, i.e. Making is the residual charge for positive and negative a certain kind, it is also possible to carry out correspondence, it is also possible to constitute by suitably Set the bias of charge-discharge control circuit and not only remove residual charge, and, also remaining is in contrast to driving Time inverse electric charge.Such as, (it is two on typical case at driven element by having the rectifier cell of rectified action Pole pipe, even light emitting diode) constituted in the case of, it is also possible to be set by the discharge and recharge of the present invention Control circuit and remaining in contrast to the reverse blas electric charge during driving of driven element as residual charge, structure Become to be driven by additional electrical flow detection device, examine simultaneously for the leakage current of rectifier cell Survey, confirm, check.

So-called rectangular in the present invention, such as, can be only 1 row or the some the linear alignment of only 1 row, The arrangement that 1 row 1 arranges, be the most only made up of 1 driven element is also incorporated herein.So-called matrix Not show the saying of global shape, it is not necessary to necessarily become the necessity of square mesh shape, therefore, can So that become can be in bending and flexibly carry out the configuration of change of shape.If the connection form connected is If rectangular connection, no matter the then shape of reality, form.But, if also comprising true form Become rectangular if, then can carry out the distribution of charge-discharge control circuit easily, therefore become more Preferable.

Advantages of the present invention, target and feature will be explained to a certain extent in the following description State, and to a certain extent, based on to investigating hereafter will be to those skilled in the art It will be apparent that or can be instructed from the practice of the present invention.The target of the present invention is excellent with other Point can pass through description below, and structure specifically noted in claims, and accompanying drawing is come real Now and obtain.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of power control circuit wiring in tradition LED display system

Fig. 2 is the schematic diagram optimizing power control circuit wiring of the present invention

Fig. 3 is the schematic diagram of the latch by the data signal shift output of concatenation

Fig. 4 is the sequential chart of coherent signal

Fig. 5 is the schematic diagram of another embodiment of the present invention

Detailed description of the invention

Embodiments of the present invention are described in detail, whereby to the present invention below with reference to drawings and Examples How application technology means solve technical problem, and the process that realizes reaching technique effect can fully understand And implement according to this.As long as it should be noted that do not constitute conflict, each embodiment in the present invention and Each feature in each embodiment can be combined with each other, and the technical scheme formed is all in the protection of the present invention Within the scope of.

First, the layout designs of voltage control circuit in traditional LED display, can from Fig. 1 Go out.Tradition LED scanning display screen uses scanning decoding circuit to export power control circuit in driving Line controls to drive signal, the most consistent with the number of scanning lines, such as sweeps LED 1/16 and scans display screen On, it is necessary to walk 16 lines.This allows in the case of LED scanning display screen spacing diminishes, PCB Plate wiring space become close in the case of, control to drive signal number directly can affect performance and the effect of wiring Rate.

One embodiment of the present of invention, has obtained detailed elaboration in fig. 2.Fig. 2 describes an electricity The structure chart of pressure control circuit, this voltage control circuit provides some voltage supplying modules (i.e. in figure Voltage supplying module 1, voltage supplying module 2 etc.), described voltage supplying module be arranged in rows many Individual luminescence unit be connected, and supply power for (i.e. to the luminescence unit service voltage V1 of arrangement in a row, V2, V3, V4 etc.), for simplicity, luminescence unit and array thereof not shown in figure, but people in the art Member is it should be understood that the voltage output of voltage supplying module is connected with luminescence unit, and luminescence unit It it is often arrangement in a row.The voltage output V1 that such as voltage supplying module 1 provides, is supplied with first The luminescence unit of row, by that analogy, voltage output V2, it is supplied with the luminescence unit of the second row.

Clock signal wiring 2, is connected with the clock signal input terminal of voltage supplying module, to provide clock Signal is to voltage supplying module.The upstream of clock signal wiring 2, can be connected with clock generator, or Person obtains clock pulse signal accurately from other parts.Preferably, the cycle of clock signal can be with The line period of scan-type display screen is consistent, sends pulsatile once when often row scanning.

Input signal wiring 1, is connected with the input signal end of at least one voltage supplying module, to provide Input signal gives this voltage supplying module, controls voltage supplying module to luminescence unit service voltage；Input In signal routing 1, transmission is periodic signal, and it is consistent with scanning display screen frame rate.Such as, The input signal of a line, the first row at each frame sends once when starting to scan, if scanning display screen Being 16 to sweep, the first row within 16 horizontal-scanning intervals sends once sweep time, and next 16 row are swept Retouch the scanning of the first row in the time and retransmit once, by that analogy.According to traditional cabling scenario, each Individual voltage supplying module is required for from external reception one tunnel input signal, the voltage supply mould that the first row is corresponding Block needs to receive the input signal corresponding with the scanning sequence of the first row, the voltage supply mould that the third line is corresponding Block needs to receive the input signal corresponding with the scanning sequence of the third line, and this brings to wires design greatly Burden, and the impact of the stray capacitance of the numerous and diverse and association connected up, significantly reduce the product of display Matter.Owing to there is the input signal of the relation in sequential, such as the first row between the input signal of different rows And two line periods in input signal interval of the third line, therefore can be received by upstream voltage supplying module The input signal arrived, converts through sequential, obtains the input signal needed for downstream voltage supplying module, this Outside wiring the most greatly saved by sample.

Connecting up 3 between voltage supplying module, it connects the voltage supplying module of upstream (such as voltage supplying module 1) and the voltage supplying module (such as voltage supplying module 2) in downstream, notably, voltage supply mould Inter-block routing 3 is connected with the output port Dout of the voltage supplying module of upstream, and and the electricity in downstream The input port Din of pressure supplying module is connected, and plays the effect at intermodule transmission signal.

As required, the signal at Din and Dout of voltage supplying module, there is temporal relation. That is the signal of output at the signal of Din output to Dout, have passed through a change.This Conversion is to be completed by the functional circuit within voltage supplying module.The functional circuit of this inside is connect The input signal received processes, to form the input signal of the voltage supplying module in downstream, and by electricity Between pressure supplying module, this signal is transmitted in wiring.Fig. 3 gives an exemplary description of functional circuit.Logical Cross and being directed at of clock signal, and by conversion, such as, shift latch, such as signal delay etc.. Din signal is postponed relative to the signal at Dout backward, when Fig. 4 gives an exemplary signal Sequence figure.

In the layout-design of Fig. 2, the voltage supplying module of upstream and the voltage supplying module phase in downstream Adjacent.In order to the convenience connected up, the voltage supplying module of upstream and the voltage supplying module in downstream can also be without Adjacent, the such as first voltage supplying module provides signal output, the second voltage to tertiary voltage supplying module Supplying module provides signal output, by that analogy, the voltage supply mould of upstream to the 4th voltage supplying module A voltage supplying module at least it is spaced between the voltage supplying module in block and downstream.This it is staggeredly arranged Voltage supplying module it can be avoided that crosstalk between module.

In another embodiment of the present invention, the luminescence unit columns of each voltage supplying module load is not With.This arrangement can stabilize the random error of signal delay effectively.Technical scheme at Fig. 5 In, the first voltage supplying module is powered to the first row luminescence unit and the second row luminescence unit, the second voltage Supplying module is powered and fifth line luminescence unit, successively to the third line luminescence unit, fourth line luminescence unit Analogize.From top to bottom, the columns of the luminescence unit that each voltage supplying module is loaded be followed successively by 2,3,2, 3,2,3... according to the actual needs, the change of above-mentioned columns can also arrange more complicated change rule Rule.Such as at display applications occasion (the outdoor jumbo LED display, or ring curtain electricity of oversize Shadow, huge curtain 3D Cine mode screen etc., such as P10, P16 and drive with the giant-screen such as upper), it is also possible to Visual custom according to human eye carries out the voltage supplying module of layout targetedly, such as upper area and is born The columns of the luminescence unit that the columns of the luminescence unit carried is loaded less than the voltage feed unit of bottom.

In yet another embodiment of the present invention, it is also possible to logic control electricity is set in voltage supplying module Road so that the voltage of the luminescence unit that same voltage supplying module is loaded does not overlaps, it is to avoid due to The luminescence unit of in blocks or continuous a few row that the mistake of signal causes is by same time point shell, thus burns out chip Or circuit board.For example, it is possible to arrange logic circuit so that the voltage signal of such as the first row and second The voltage signal of row is the relation negated in logic, or both pulse sequences exist interval.At least do not have Have overlapping, thus light while being effectively prevented from neighbouring luminescence unit.After knowing this principle, this The technical staff in field can arrange concrete logic circuit structure, and therefore here is omitted.

The scope of application of the present invention is extremely wide, such as in the display device of scan-type, and such as liquid crystal Showing, such as plasma shows, such as OLED and LED array show.The voltage supplying party of the present invention Formula enables to wiring and has great elasticity, and the defencive function of neighbouring display line is integrated in connection Voltage supplying module in, without arranging protection module of overall importance, decrease the design overhead of system.

The present invention shifts or delay circuit by increasing signal in voltage supply circuit, decreases cloth Line, it is often more important that add the motility of wiring so that in specific application scenario, such as giant-screen In scanning display, add the adaptability of power-supply circuit, and provide at the aspect such as power consumption, stability Benefit.

Although the embodiment that disclosed herein is as above, but described content is only to facilitate understand this The embodiment invented and use, is not limited to the present invention.In any the technical field of the invention Technical staff, on the premise of without departing from the spirit and scope that disclosed herein, can implement And make any amendment and change in details in form, but the scope of patent protection of the present invention, still must be with institute Attached claims are defined in the range of standard.

Claims

1. a color LED display device, it is characterised in that including:

Some voltage supplying modules, described voltage supplying module and the multiple luminescence unit phases being arranged in rows Connect, and supply power for；

Clock signal connects up, and is connected with the clock signal input terminal of voltage supplying module, to provide clock to believe Number give voltage supplying module；

Input signal connects up, and is connected with the input signal end of at least one voltage supplying module, to provide defeated Enter signal to this voltage supplying module；

Connect up between voltage supplying module, the voltage supply mould in its voltage supplying module connecting upstream and downstream Block, the voltage supplying module of wherein said upstream includes the functional circuit of inside, the functional circuit of this inside The input signal received processes, to form the input signal of the voltage supplying module in downstream, and This signal is transmitted by wiring between voltage supplying module；Wherein,

The described multiple luminescence units being arranged in rows are divided into some viewing areas；Wherein, each display Region includes at least two row luminescence units, and each viewing area is powered by a voltage supplying module；Further, In two viewing areas corresponding to two voltage supplying modules connected by the wiring of a certain intermodule, one The number of the luminescence unit that viewing area comprises is odd number, the luminescence unit that another viewing area comprises Number is even number.

2. LED display as claimed in claim 1, it is characterised in that described luminescence unit includes Multiple LED.

3. LED display as claimed in claim 1, it is characterised in that described luminescence unit includes Red, blue, yellow sub-pixel.

4. LED display as claimed in claim 1, it is characterised in that described voltage supplying module It is integrated in the inside of LED drive chip.