CN102866346A - Platform and method for testing light-emitting diode (LED) array drive efficiency - Google Patents
Platform and method for testing light-emitting diode (LED) array drive efficiency Download PDFInfo
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- CN102866346A CN102866346A CN2012103432949A CN201210343294A CN102866346A CN 102866346 A CN102866346 A CN 102866346A CN 2012103432949 A CN2012103432949 A CN 2012103432949A CN 201210343294 A CN201210343294 A CN 201210343294A CN 102866346 A CN102866346 A CN 102866346A
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Abstract
The embodiment of the invention discloses a platform and a method for testing light-emitting diode (LED) array drive efficiency, and relates to the field of testing. The problem that a drive efficiency value cannot reach a designated value even if a drive chip is modified adaptively due to the characteristics of the drive chip is solved. The platform for testing the light-emitting diode array drive efficiency comprises an LED array, the drive chip and a plurality of switches, wherein the LED array comprises at least one row of LED light bars and a drive interface; each row of LED light bars comprises a plurality of LED bases independent to one another, and LED lamps arranged on the LED bases; the drive chip is connected with the LED array by the drive interface; and the plurality of switches are acted upon the LED array. The platform and the method can be applied to manufacturing LED backlight sources in a liquid crystal display device.
Description
Technical field
The present invention relates to field tests, relate in particular to platform and the method for a kind of test light emitting diode (Light Emitting Diode is designated hereinafter simply as LED) array drive efficiency.
Background technology
The LED-backlit source is to provide the backlight module of light source with led array to liquid crystal panel, and wherein led array is that LED lamp by string and combination consists of.When making the LED-backlit source, often only make the LED lamp of a kind of string and combination, and the LED lamp of this kind array mode is carried out the drive efficiency test.At present, general demand motive efficient reaches more than 90% even 95%, if carry out drive efficiency that the drive efficiency test obtains less than designated value, such as 90%, 95% etc., need to carry out adaptability revision to driving chip.
In the process that realizes the embodiment of the invention, the inventor finds, there is following problem at least in prior art: owing to drive chip characteristics, causing adaptability revision to drive chip can not be so that drive efficiency reaches designated value, and the adaptability revision also more complicated of process that drives chip.
Summary of the invention
Platform and the method for the test led array drive efficiency that the embodiment of the invention provides, in order to solve owing to driving chip characteristics, causing adaptability revision to drive chip can not be so that the drive efficiency value reaches designated value, and the adaptability revision also problem of more complicated of process that drives chip.
For achieving the above object, the embodiment of the invention adopts following technical scheme:
On the one hand, the embodiment of the invention provides a kind of platform of testing the led array drive efficiency, comprise led array, drive chip and a plurality of switch, described led array comprises at least one row LED lamp bar and drives interface, and every row LED lamp bar comprises a plurality of separate LED pedestals and is arranged on LED lamp on the described LED pedestal; Described driving chip is connected with described led array by described driving interface, is used for driving described led array; Described a plurality of on-off action makes in the described led array and realizes optionally connection in series-parallel between each LED lamp in led array.
Further, for convenient control to described a plurality of switches, the platform of described test led array drive efficiency also comprises on-off controller, and described a plurality of switches comprise relay and/or analog switch; The I/O port of described on-off controller is connected with the signal input part of described a plurality of switches by wire, is used for controlling the operation of a plurality of switches.
Concrete, described on-off controller is single-chip microcomputer, field programmable gate array (Field-Programmable Gate Array is designated hereinafter simply as FPGA), ARM microprocessor or Power PC.
Optionally, described a plurality of switch is hand control switch.
Further, optional, described a plurality of switches comprise a plurality of switch elements, and each described switch element comprises one first switch, a second switch and one the 3rd switch;
Described led array is the led array that comprises a row LED lamp bar, and each the LED pedestal in the described LED lamp bar is provided with a described switch element;
The first end of first LED pedestal all accesses the first end of described driving interface in the described LED lamp bar, and the second end connects with the first switch of corresponding switch element;
The first switch in the described switch element so that corresponding LED pedestal connect with a rear LED pedestal, the first switch that last LED pedestal is corresponding accesses the second end of described driving interface by the 3rd switch of correspondence, wherein, a described rear LED pedestal is with the LED pedestal of arranging and be positioned at its right with described corresponding LED pedestal;
Second switch is connected successively in the described switch element, and the first end access of the second switch that first LED pedestal is corresponding drives the first end of interface, and the second termination of the second switch that last LED pedestal is corresponding enters to drive the second end of interface;
The 3rd switch is between first switch and second switch of correspondence in the described switch element, and with corresponding the first switch and second switch series connection.
Further, optional, described led array is the led array that comprises n row LED lamp bar, and every row LED lamp bar comprises m separate LED pedestal, and wherein, m, n are the integer more than or equal to 2;
Described a plurality of switch comprises m*n switch element and individual the 4th switch of m* (n-1), and each described switch element comprises one first switch, a second switch and one the 3rd switch;
Each LED pedestal is provided with a described switch element, be provided with described the 4th switch corresponding to the 1st each switch element that is discharged to n-1 row LED lamp bar, the second end connection of the second switch of corresponding switch element in the second end connection of first switch of the first end of described the 4th switch by corresponding switch element and corresponding LED pedestal, the second end of described the 4th switch and next row LED lamp;
The first end of the 1st LED pedestal all accesses the first end of described driving interface in every row LED lamp bar, and the second termination enters the first end of the first switch of corresponding switch element;
The first switch in the switch element that the 1st to m-1 LED pedestal is corresponding in the every row LED lamp bar so that corresponding LED pedestal arrange a rear LED pedestal and connect with same, for the 1st row LED lamp bar, m the first switch corresponding to LED pedestal accesses the second end of described driving interface by the 3rd switch of correspondence, be discharged to n row LED lamp bar for the 2nd, m the first switch corresponding to LED pedestal arranged m the 4th switch that the LED pedestal is corresponding in the LED lamp bar by corresponding the 3rd switch access upper, wherein, described is with the LED pedestal of arranging and be positioned at its right with described corresponding LED pedestal with the rear LED pedestal of row;
Second switch is connected successively in the switch element that each LED pedestal is corresponding in every row LED lamp bar, every first end access of arranging the 1st second switch that the LED pedestal is corresponding drives the first end of interface, and the second termination of the second switch that m LED pedestal is corresponding enters to drive the second end of interface;
The 3rd switch is between first switch and second switch of correspondence in the switch element that each LED pedestal is corresponding in the every row LED lamp bar, and with corresponding the first switch and second switch series connection.
On the other hand, the present invention also provides a kind of method of testing the led array drive efficiency, be applied to test the platform of led array drive efficiency, the platform of described test led array drive efficiency comprises led array, drives chip and a plurality of switch, described led array comprises at least one row LED lamp bar and drives interface, and every row LED lamp bar comprises a plurality of separate LED pedestals and is arranged on LED lamp on the described LED pedestal; Described driving chip is connected with described led array by described driving interface, is used for driving described led array; Described a plurality of on-off action makes in the described led array and realizes optionally connection in series-parallel between each LED lamp in led array, and the method comprises: the connection in series-parallel that realizes each LED lamp in the led array by described a plurality of switches; Measure the voltage and current of described driving interface; Obtain the led array drive efficiency according to the voltage and current of described driving interface and the supply voltage and the source current that offer described driving chip; If the described led array drive efficiency that obtains is less than the threshold value that sets in advance, conducting or opening operation by described a plurality of switches, change the series parallel structure of each LED lamp in the led array, until the led array drive efficiency is more than or equal to the described threshold value that sets in advance.
Further, for convenient control to described a plurality of switches, the platform of described test led array drive efficiency also comprises on-off controller, and described a plurality of switches comprise relay and/or analog switch; The I/O port of described on-off controller is connected with the signal input part of described a plurality of switches by wire, is used for controlling the operation of a plurality of switches; Describedly realize specifically comprising the connection in series-parallel of each LED lamp in the led array by described a plurality of switches: the control signal that sends according to on-off controller is controlled conducting or the opening operation of a plurality of switches, realizes the connection in series-parallel of each LED lamp in the led array;
If the described described led array drive efficiency that obtains is less than the threshold value that sets in advance, regulate the connection in series-parallel relation of each LED lamp in the led array by described a plurality of switches, until the led array drive efficiency is more than or equal to the described threshold value that sets in advance, specifically comprise: if the described led array drive efficiency that obtains is less than the threshold value that sets in advance, described on-off controller is regulated conducting or the opening operation of described a plurality of switches, change the series parallel structure of each LED lamp in the led array, until the led array drive efficiency is more than or equal to the described threshold value that sets in advance.
Platform and the method for the test led array drive efficiency that the embodiment of the invention provides, by a plurality of on-off actions in led array, make in the described led array and realize optionally connection in series-parallel between each LED lamp, when carrying out the test of led array drive efficiency, by conducting or the opening operation to a plurality of switches, so that in the led array between each LED lamp series parallel structure variable, thereby changed the load that drives chip, drive the load regulation led array drive efficiency of chip to reach designated value (threshold value that namely sets in advance) by change, solved in the prior art owing to drive chip characteristics, causing adaptability revision to drive chip can not be so that the drive efficiency value reaches designated value, and the adaptability revision also problem of more complicated of process that drives chip.
Description of drawings
The structural representation one of the platform of the test led array drive efficiency that Fig. 1 provides for the embodiment of the invention;
The structural representation two of the platform of the test led array drive efficiency that Fig. 2 provides for the embodiment of the invention;
Fig. 3 (a) is the circuit theory diagrams one that led array that Fig. 1 is connected with Fig. 2 is connected with a plurality of switches;
Fig. 3 (b) is the circuit theory diagrams two that led array that Fig. 1 is connected with Fig. 2 is connected with a plurality of switches;
Fig. 3 (c) is the circuit theory diagrams that many row's led array are connected with a plurality of relays;
The process flow diagram of the method for the test led array drive efficiency that Fig. 4 provides for the embodiment of the invention;
The process flow diagram of the method for the test led array drive efficiency that Fig. 5 provides for further embodiment of this invention.
Reference numeral:
The 1-LED array; 11-LED lamp bar; The 111-LED pedestal; The 112-LED lamp; 12-drives interface; 2-drives chip; The 3-switch; 31-the first switch; The 32-second switch; 33-the 3rd switch; 34-the 4th switch; The 35-switch element; The 4-on-off controller.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
In order to solve prior art owing to driving chip characteristics, causing adaptability revision to drive chip can not be so that the drive efficiency value reaches designated value, and the process of adaptability revision driving chip is the problem of more complicated also, and the embodiment of the invention provides a kind of platform and method of testing the led array drive efficiency.
As shown in Figure 1, the embodiment of the invention provides a kind of platform of testing the led array drive efficiency, comprise led array 1, drive chip 2 and a plurality of switch 3, described led array 1 comprises at least one row LED lamp bar 11 and drives interface 12, and every row LED lamp bar 11 comprises a plurality of separate LED pedestals 111 and is arranged on LED lamp 112 on the described LED pedestal 111; Described driving chip 2 is connected with described led array 1 by described driving interface 12, is used for driving described led array 1; Described a plurality of switch 3 acts on led array 1, makes in the described led array 1 each LED lamp can realize lighting separately and extinguishing, and perhaps and between other at least one LED lamps realizes serial or parallel connection.
Optionally, described a plurality of switches can be hand control switches, by manual control, realize conducting and the disconnection of hand control switch, and a plurality of switches are by wire and led array.
Optionally, for convenient control to described a plurality of switches, as shown in Figure 2, the platform of described test led array drive efficiency also comprises on-off controller 4, and described a plurality of switches can comprise relay and/or analog switch; The I/O port of described on-off controller 4 is connected with the signal input part of described a plurality of switches by wire, is used for controlling the operation of a plurality of switches.
Wherein, described relay generally is comprised of iron core, coil, armature, contact reed etc., as long as add certain voltage at the coil two ends, will flow through certain electric current in the coil, thereby generation galvanomagnetic effect, armature can overcome the pulling force of return spring under the effect of electromagnetic attracting force inhales to iron core, thereby with moving contact and stationary contact (normally opened contact) adhesive of moving armature.Behind coil blackout, the suction of electromagnetism also disappears thereupon, and armature will return original position at the reacting force of spring, makes moving contact and original stationary contact (normally closed contact) release.Like this adhesive, release, thus reached the conducting in circuit, the purpose of disconnection.For " often open, normally closed " contact of relay, can distinguish like this: be in the stationary contact of off-state when relay coil is not switched on, be called " normally opened contact "; The stationary contact that is in on-state is called " normally closed contact ".Select the unicoil signal relay to can be used as a switch, control a circuit; Select the twin coil signal relay to can be used as two switches, control two circuits.
Wherein, described analog switch can be switching transistor, and switching transistor is switch under control signal because play on-off action, so actual be that transistor claims analog switch.
Concrete, in the present embodiment, described on-off controller can be single-chip microcomputer, FPGA, ARM or Power PC.
Wherein, single-chip microcomputer is a kind of integrated circuit (IC) chip, is to adopt very large scale integration technology that central processor CPU, random access memory ram, read only memory ROM, multiple I/O mouth and the functions such as interrupt system, timer/timer (may also comprise the circuit such as display driver circuit, pulse-width modulation circuit, analog multiplexer, A/D converter) with data-handling capacity are integrated into a little and perfect microcomputer system that consists of on the silicon chip;
FPGA occurs as a kind of semi-custom circuit in special IC (ASIC) field, has both solved the deficiency of custom circuit, has overcome again the limited shortcoming of original programming device gate circuit number;
ARM is senior risc microcontroller, and arm processor itself is 32 designs, but also is equipped with 16 bit instruction collection.Reach 35% than 32 codes saving of equal value in general, the institute that but can keep 32 systems has superiority;
Power PC is high-performance 32-bit and 64 risc microcontroller series of being developed jointly by IBM (International Business Machine Corporation (IBM)) Motorola (Motorola Inc.) and Apple (Apple).
Further, shown in Fig. 3 (a), described a plurality of switches comprise a plurality of switch elements 35, and each described switch element 35 comprises one first switch 31, a second switch 32 and one the 3rd switch 33;
Described LED1 array is the led array that comprises a row LED lamp bar 11, and each the LED pedestal 111 in the described LED lamp bar 11 is provided with a described switch element 31.
In the present embodiment, the first end that the right incoming end of described LED pedestal 111 is called described LED pedestal is that the left side incoming end of described LED pedestal 111 is called the second end of described LED pedestal 111; The first switch 31 in the described switch element 35, second switch 32 and the 3rd switch 33 include the access interface of two described led array 1 of access, one of them access interface is called the first end of described the first switch 31, second switch 32 or the 3rd switch 33, and another access interface is called the second end of described the first switch 31, second switch 32 or the 3rd switch 33.
In the situation of the below to LED pedestal 111 diverse location in LED lamp bar 11, the annexation between LED pedestal 111 and switch element and other LED pedestals 111 is described in detail:
One) described LED pedestal 111 is the first LED pedestal in the described LED lamp bar 11;
The first end of the first LED pedestal in the described LED lamp bar 11 accesses the first end of described driving interface 12, the second end of described first LED pedestal is connected with second LED pedestal by the first corresponding switch, described first LED pedestal also is parallel with corresponding second switch, the first end of described first LED pedestal connects with the first end of corresponding second switch, the second end of the second switch that first LED pedestal is corresponding by the 3rd corresponding switch be connected switch and be connected with the second end of described first LED pedestal, so that when the equal closure of three switches of switch element corresponding to described first LED pedestal, described first LED pedestal is by short circuit.
Wherein, the second end of described first LED pedestal is connected with second LED pedestal by the first corresponding switch, is specially:
The second end of described first LED pedestal connects with the first end of the first corresponding switch, the second end of the first switch of described correspondence is connected with the first end of described second LED pedestal, so that during the first switch closure corresponding to described first LED pedestal, described first LED pedestal is connected with described second LED pedestal.
The second end of the second switch that described first LED pedestal is corresponding by the 3rd corresponding switch be connected switch and be connected with the second end of described first LED pedestal, be specially:
The second end of the second switch that described first LED pedestal is corresponding connects with the first end of the 3rd corresponding switch, the second end of the 3rd switch of described correspondence connects with the second end of the first corresponding switch, so that during the 3rd switch closure corresponding to the first switch corresponding to described first LED pedestal and described first LED pedestal, described first LED pedestal is in parallel with corresponding second switch.
Two) described LED pedestal 111 is last the LED pedestal in the described LED lamp bar 11;
The first end of last the LED pedestal in the described LED lamp bar 11 is connected with described penult LED pedestal by the first switch corresponding to penult LED pedestal, first switch and corresponding three switch second end that access described driving interface 12 of the second end of described last LED pedestal by correspondence, described last LED pedestal also is parallel with corresponding second switch, the first end of the second switch that last LED pedestal is corresponding is connected with the first end of last LED pedestal by the 3rd switch corresponding to penult LED pedestal, and the second end of the second switch corresponding with penult LED pedestal connects, the second end of the second switch that last LED pedestal is corresponding by the 3rd switch corresponding to last LED pedestal be connected switch and be connected with the second end of described last LED pedestal, so that when the 3rd switch of switch element corresponding to three switches of switch element corresponding to described last LED pedestal and described penult LED pedestal was all closed, described last LED pedestal was by short circuit.
Wherein, the first end of last the LED pedestal in the described LED lamp bar 11 is connected with described penult LED pedestal by the first switch corresponding to penult LED pedestal, is specially:
The second end of the first switch that the first end of described last LED pedestal is corresponding with penult LED pedestal connects, the first end of the first switch that described penult LED pedestal is corresponding is connected with described penult LED pedestal, so that during the first switch closure corresponding to described penult LED pedestal, described last LED pedestal is connected with described penult LED pedestal.
First switch and corresponding three switch second end that access described driving interface 12 of the second end of described last LED pedestal by correspondence is specially:
The second end of described last LED pedestal connects with the first end of the first corresponding switch, the second end of the first corresponding switch connects with the second end of the 3rd corresponding switch, the first end of the 3rd corresponding switch accesses the second end of described driving interface 12, when the first switch corresponding to described last LED pedestal and corresponding the 3rd switch were all closed, described last LED pedestal access drove interface.
The first end of the second switch that described last LED pedestal is corresponding is connected with the first end of last LED pedestal by the 3rd switch corresponding to penult LED pedestal, is specially:
The first end of the 3rd switch that the first end of the second switch that described last LED pedestal is corresponding is corresponding with described penult LED pedestal connects, and the second end of the 3rd switch that described penult LED pedestal is corresponding is connected with the first end of last LED pedestal.
The second end of the second switch that described last LED pedestal is corresponding by the 3rd switch corresponding to last LED pedestal be connected switch and be connected with the second end of described last LED pedestal, be specially:
The first end of the 3rd switch that the second end of the second switch that described last LED pedestal is corresponding is corresponding with described last LED pedestal connects, the second end of the first switch that the second end of the 3rd switch that described last LED pedestal is corresponding is corresponding with described last LED pedestal connects, and the first end of the first switch that described last LED pedestal is corresponding is connected with the second end of described last LED pedestal.
Three) described LED pedestal 111 is the middle LED pedestal in the described LED lamp bar 11;
The first end of the middle LED pedestal in the described LED lamp bar 11 is connected with described previous LED pedestal by the first switch corresponding to previous LED pedestal, the second end of LED pedestal is connected with a rear LED pedestal by the first corresponding switch in the middle of described, the LED pedestal also is parallel with corresponding second switch in the middle of described, the first end of the second switch that middle LED pedestal is corresponding is connected with the first end of described middle LED pedestal by the 3rd switch corresponding to previous LED pedestal, the second end of the second switch that the LED pedestal is corresponding in the middle of described by the 3rd switch corresponding to described intermediate switch be connected second end of switch with described centre LED pedestal and be connected, so that the 3rd switch corresponding to described previous LED pedestal and described in the middle of three switches of switch element corresponding to LED pedestal when all closed, described in the middle of the LED pedestal by short circuit.
Wherein, described middle LED pedestal is other LED pedestals except described first LED pedestal and described last LED pedestal in the described LED lamp bar; Described previous LED pedestal is with the LED pedestal of arranging and be positioned at the described LED pedestal left side with described middle LED pedestal; A described rear LED pedestal is that middle LED pedestal is with the LED pedestal of arranging and be positioned at described LED pedestal the right.
Wherein, the first end of described middle LED pedestal is connected with described previous LED pedestal by the first switch corresponding to previous LED pedestal, is specially:
The second end of the first switch that the first end of LED pedestal is corresponding with described previous LED pedestal in the middle of described connects, the first end of the first switch that described previous LED pedestal is corresponding is connected with the second end of described previous LED pedestal, so that during the first switch closure corresponding to described previous LED pedestal, described in the middle of the LED pedestal connect with described previous LED pedestal.
The second end of LED pedestal is connected with a rear LED pedestal by the first corresponding switch in the middle of described, is specially:
The second end of described middle LED pedestal connects with the first end of the first corresponding switch, the second end of the first switch of described correspondence is connected with the first end of a rear LED pedestal, so that during the first switch closure of described correspondence, described in the middle of the LED pedestal connect with a described rear LED pedestal.
The first end of the second switch that the LED pedestal is corresponding in the middle of described is connected with the first end of described middle LED pedestal by the 3rd switch corresponding to previous LED pedestal, is specially:
The first end of the 3rd switch that the first end of the second switch that the LED pedestal is corresponding in the middle of described is corresponding with described previous LED pedestal connects, and the second end of the 3rd switch that described previous LED pedestal is corresponding is connected with the first end of described middle LED pedestal.
The second end of the second switch that the LED pedestal is corresponding in the middle of described by the 3rd switch corresponding to LED in the middle of described be connected switch with described in the middle of the second end of LED pedestal be connected, be specially:
The first end of the 3rd switch that the second end of the second switch that the LED pedestal is corresponding in the middle of described is corresponding with described middle LED pedestal connects, with described in the middle of the 3rd switch corresponding to LED pedestal the second end with described in the middle of the second end of the first switch corresponding to LED pedestal is connected, the first end of the first switch that described centre LED pedestal is corresponding with described in the middle of the second end of LED pedestal be connected.
Further, concrete, optional, shown in Fig. 3 (b), described led array is the led array that comprises n row LED lamp bar 11, and every row LED lamp bar 11 comprises m separate LED pedestal 111, and wherein, m, n are the integer more than or equal to 2.
Described a plurality of switch comprises m*n switch element 35 and individual the 4th switch 34 of m* (n-1), and each described switch element 35 comprises one first switch 31, a second switch 32 and one the 3rd switch 33.
Each LED pedestal 111 is provided with a described switch element 35, be provided with described the 4th switch 34 corresponding to the 1st each switch element 35 that is discharged to n-1 row LED lamp bar 11, the second end connection of the second switch 32 of corresponding switch element 35 in the second end connection of first switch 31 of the first end of described the 4th switch 34 by corresponding switch element 35 and corresponding LED pedestal 111, the second end of described the 4th switch 35 and next row LED lamp bar 11.
In the situation of the below to LED pedestal 111 diverse location in LED lamp bar 11, the annexation between LED pedestal 111 and switch element and other LED pedestals 111 is described in detail:
One) described LED pedestal 111 is the first LED pedestal in the described LED lamp bar 11;
The first end of the first LED pedestal in every row LED lamp bar 11 all accesses the first end of described driving interface 12, the second end of described first LED pedestal is connected with second LED pedestal arranging together by the first corresponding switch, first LED pedestal in described every row LED lamp bar 11 also is parallel with corresponding second switch, the first end of described first LED pedestal connects with the first end of corresponding second switch, the second end of described first LED pedestal is by the second end connection with corresponding second switch of the first corresponding switch and the 3rd switch, so that when the equal closure of three switches of switch element corresponding to described first LED pedestal, described first LED pedestal is by short circuit.
Two) described LED pedestal 111 is last the LED pedestal in the described LED lamp bar 11;
The first end of last the LED pedestal in every row LED lamp bar 11 is all by connecting with row's penult LED pedestal with described with the first switch corresponding to row's penult LED pedestal, for the second end of described last LED pedestal of the 1st row the first switch and the 3rd corresponding switch the second end of accessing described driving interface 12 by correspondence, the 4th switch corresponding to last LED pedestal in the LED lamp bar of arranging by the first corresponding switch and corresponding the 3rd switch access upper for the 2nd the second end that is discharged to described last LED pedestal of n row; Described last LED pedestal in every row LED lamp bar also is parallel with corresponding second switch, the first end of the second switch that last LED pedestal is corresponding is connected with the first end of last LED pedestal by the 3rd switch corresponding to penult LED pedestal, and connect with the second end with second switch corresponding to row's penult LED pedestal, the second end of the second switch that last LED pedestal is corresponding by the 3rd switch corresponding to last LED pedestal be connected switch and be connected with the second end of described last LED pedestal, so that when the 3rd switch of switch element corresponding to three switches of switch element corresponding to described last LED pedestal and described penult LED pedestal was all closed, described last LED pedestal was by short circuit.
Three) described LED pedestal 111 is the middle LED pedestal in the described LED lamp bar 11;
The first end of the middle LED pedestal in every row LED lamp bar 11 is connected with described previous LED pedestal by the first switch corresponding to previous LED pedestal, the second end of LED pedestal is connected with a rear LED pedestal by the first corresponding switch in the middle of described, middle LED pedestal in described every row LED lamp bar 11 also is parallel with corresponding second switch, the first end of the second switch that the LED pedestal is corresponding in the middle of described is connected with the first end of described middle LED pedestal by the 3rd switch corresponding to previous LED pedestal, the second end of the second switch that the LED pedestal is corresponding in the middle of described by the LED pedestal is corresponding in the middle of described the 3rd switch be connected switch with described in the middle of the second end of LED pedestal be connected, so that the 3rd switch corresponding to described previous LED pedestal and described in the middle of three switches of switch element corresponding to LED pedestal when all closed, described in the middle of the LED pedestal by short circuit;
Wherein, described middle LED pedestal is other LED pedestals except described first LED pedestal and described last LED pedestal in the described LED lamp bar; Described previous LED pedestal is with the LED pedestal of arranging and be positioned at the described LED pedestal left side with described middle LED pedestal; A described rear LED pedestal is that middle LED pedestal is with the LED pedestal of arranging and be positioned at described LED pedestal the right.
In the present embodiment, take described led array as many row LED lamp bars, described switch is that relay is example, is described in detail, after on-off controller sends instruction, so that Fig. 3 (c) repeat circuit K21, K31, K12......K1n be in normally closed contact, the conducting circuit, other relays are in normally opened contact, line broken circuit, therefore the upper LED lamp conduction that arranges of LED pedestal D11 is lighted, and other LED lamps are dark.By that analogy, can light separately in the array LED of each.Perhaps, after on-off controller sends instruction, so that Fig. 3 (c) repeat circuit K31, K32 ... K3 (10); K71, K72 ... K7 (10); K2 (10), K4 (10), K6 (10); K1 (11), K1 (12) ... K (1n) is in normally closed contact, the conducting circuit, and other relays are in normally opened contact, line broken circuit, can realize 10 strings 2 unitized construction also, namely 10 LED series connection are a row, the such LED lamp of 2 rows in parallel.By that analogy, can realize multiple string and unitized construction.
What deserves to be explained is that the led array that present embodiment provides, a plurality of switch and on-off controller all can be integrated on the PCB circuit board.
In addition, except above-mentioned relay, other all similar structures realize that the mode of above-mentioned syntagmatic is all within protection domain.
The platform of the test led array drive efficiency that the embodiment of the invention provides, by a plurality of on-off actions in led array, make in the described led array each LED lamp can realize lighting separately or extinguishing, perhaps and between other at least one LED lamps realize optionally connection in series-parallel, when carrying out the test of led array drive efficiency, by conducting or the opening operation to a plurality of switches, so that in the led array between each LED lamp series parallel structure variable, thereby changed the load that drives chip, drive the load regulation led array drive efficiency of chip to reach designated value (threshold value that namely sets in advance) by change, solved in the prior art owing to drive chip characteristics, causing adaptability revision to drive chip can not be so that the drive efficiency value reaches designated value, and the adaptability revision also problem of more complicated of process that drives chip.
The embodiment of the invention also provides a kind of method of testing the led array drive efficiency, as shown in Figure 4, is used for the platform of test led array drive efficiency, structure shown in Figure 1 among the structure of the platform of described test led array drive efficiency and the embodiment one is identical, repeat no more, the method comprises herein:
401, realize the connection in series-parallel of each LED lamp in the led array by described a plurality of switches.
402, measure the voltage and current of described driving interface.
403, obtain the led array drive efficiency according to the voltage and current of described driving interface and the supply voltage and the source current that offer described driving chip.
In the present embodiment, described led array drive efficiency P is specially:
P＝(U
1I
1/U
2I
2)*100％
Wherein, U
1For driving the voltage of interface, I
1For driving the electric current of interface, U
2Be the supply voltage of described driving chip, I
2Source current for described driving chip.
If the 404 described led array drive efficiencies that obtain are less than the threshold value that sets in advance, conducting or opening operation by described a plurality of switches, change the series parallel structure of each LED lamp in the led array, until the led array drive efficiency is more than or equal to the described threshold value that sets in advance.
The method of the test led array drive efficiency that the embodiment of the invention provides, by a plurality of on-off actions in led array, make in the described led array each LED lamp can realize lighting separately or extinguishing, perhaps and between other at least one LED lamps realize optionally connection in series-parallel, when carrying out the test of led array drive efficiency, by conducting or the opening operation to a plurality of switches, so that in the led array between each LED lamp series parallel structure variable, thereby changed the load that drives chip, drive the load regulation led array drive efficiency of chip to reach designated value (threshold value that namely sets in advance) by change, solved in the prior art owing to drive chip characteristics, causing adaptability revision to drive chip can not be so that the drive efficiency value reaches designated value, and the adaptability revision also problem of more complicated of process that drives chip.
Solving prior art owing to drive chip characteristics, causing adaptability revision to drive chip can not be so that the drive efficiency value reaches designated value, and the process that adaptability revision drives chip also the problem of more complicated simultaneously for convenient control to described a plurality of switches, as shown in Figure 5, the platform that is used for test led array drive efficiency that further embodiment of this invention provides, structure shown in Figure 2 among the structure of the platform of described test led array drive efficiency and the embodiment one is identical, repeat no more herein, the method comprises:
501, the control signal that sends according to on-off controller is controlled conducting or the opening operation of a plurality of switches, realizes the connection in series-parallel of each LED lamp in the led array.
502, measure the voltage and current of described driving interface.
503, obtain the led array drive efficiency according to the voltage and current of described driving interface and the supply voltage and the source current that offer described driving chip.
In the present embodiment, described led array drive efficiency P is specially:
P＝(U
1I
1/U
2I
2)*100％
Wherein, U
1For driving the voltage of interface, I
1For driving the electric current of interface, U
2Be the supply voltage of described driving chip, I
2Source current for described driving chip.
If the 504 described led array drive efficiencies that obtain are less than the threshold value that sets in advance, described on-off controller is regulated conducting or the opening operation of described a plurality of switches, change the series parallel structure of each LED lamp in the led array, until the led array drive efficiency is more than or equal to the described threshold value that sets in advance.
The method of the test led array drive efficiency that the embodiment of the invention provides, by a plurality of on-off actions in led array, make in the described led array each LED lamp can realize lighting separately or extinguishing, perhaps and between other at least one LED lamps realize optionally connection in series-parallel, when carrying out the test of led array drive efficiency, by conducting or the opening operation to a plurality of switches, so that in the led array between each LED lamp series parallel structure variable, thereby changed the load that drives chip, drive the load regulation led array drive efficiency of chip to reach designated value (threshold value that namely sets in advance) by change, solved in the prior art owing to drive chip characteristics, causing adaptability revision to drive chip can not be so that the drive efficiency value reaches designated value, and the adaptability revision also problem of more complicated of process that drives chip.
Platform and the method for the test led array drive efficiency that the embodiment of the invention provides can be applied to make in the liquid crystal indicator making in LED-backlit source.
One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method is to come the relevant hardware of instruction to finish by program, described program can be stored in the computer-readable recording medium, such as ROM/RAM, magnetic disc or CD etc.
The above; be the specific embodiment of the present invention only, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (8)
1. a platform of testing LED array drive efficiency is characterized in that, comprise led array, drive chip and a plurality of switch,
Described led array comprises at least one row LED lamp bar and drives interface, and every row LED lamp bar comprises a plurality of separate LED pedestals and is arranged on LED lamp on the described LED pedestal;
Described driving chip is connected with described led array by described driving interface, is used for driving described led array;
Described a plurality of on-off action can light separately or extinguish each the LED lamp in the described led array in led array, or carries out serial or parallel connection with other at least one LED lamps in the described led array.
2. the platform of test led array drive efficiency according to claim 1 is characterized in that, also comprises on-off controller,
Described a plurality of switch comprises relay and/or analog switch;
The I/O port of described on-off controller is connected with the signal input part of described a plurality of switches by wire, is used for controlling the operation of a plurality of switches.
3. the platform of test led array drive efficiency according to claim 2 is characterized in that, described on-off controller is single-chip microcomputer, FPGA, ARM or Power PC.
4. the platform of test led array drive efficiency according to claim 1 is characterized in that, described a plurality of switches are hand control switch.
5. the platform of each described test led array drive efficiency is characterized in that according to claim 1-4,
Described a plurality of switch comprises a plurality of switch elements, and each described switch element comprises one first switch, a second switch and one the 3rd switch;
Described led array is the led array that comprises a row LED lamp bar, and each the LED pedestal in the described LED lamp bar is provided with a described switch element;
The first end of first LED pedestal all accesses the first end of described driving interface in the described LED lamp bar, and the second end of described first LED pedestal connects with the first switch of corresponding switch element;
The first switch in the described switch element so that corresponding LED pedestal connect with a rear LED pedestal, the first switch that last LED pedestal is corresponding accesses the second end of described driving interface by the 3rd switch of correspondence, wherein, a described rear LED pedestal is with the LED pedestal of arranging and be positioned at its right with described corresponding LED pedestal;
Second switch is connected successively in the described switch element, and the first end access of the second switch that first LED pedestal is corresponding drives the first end of interface, and the second termination of the second switch that last LED pedestal is corresponding enters to drive the second end of interface;
The 3rd switch is between first switch and second switch of correspondence in the described switch element, and with corresponding the first switch and second switch series connection.
6. the platform of each described test led array drive efficiency is characterized in that according to claim 1-4,
Described led array is the led array that comprises n row LED lamp bar, and every row LED lamp bar comprises m separate LED pedestal, and wherein, m, n are the integer more than or equal to 2;
Described a plurality of switch comprises m*n switch element and individual the 4th switch of m* (n-1), and each described switch element comprises one first switch, a second switch and one the 3rd switch;
Each LED pedestal is provided with a described switch element, be provided with described the 4th switch corresponding to the 1st each switch element that is discharged to n-1 row LED lamp bar, the second end connection of the second switch of corresponding switch element in the second end connection of first switch of the first end of described the 4th switch by corresponding switch element and corresponding LED pedestal, the second end of described the 4th switch and next row LED lamp;
The first end of the 1st LED pedestal all accesses the first end of described driving interface in every row LED lamp bar, and the second termination enters the first end of the first switch of corresponding switch element;
The first switch in the switch element that the 1st to m-1 LED pedestal is corresponding in the every row LED lamp bar so that corresponding LED pedestal arrange a rear LED pedestal and connect with same, for the 1st row LED lamp bar, m the first switch corresponding to LED pedestal accesses the second end of described driving interface by the 3rd switch of correspondence, be discharged to n row LED lamp bar for the 2nd, m the first switch corresponding to LED pedestal arranged m the 4th switch that the LED pedestal is corresponding in the LED lamp bar by corresponding the 3rd switch access upper, wherein, described is with the LED pedestal of arranging and be positioned at its right with described corresponding LED pedestal with the rear LED pedestal of row;
Second switch is connected successively in the switch element that each LED pedestal is corresponding in every row LED lamp bar, every first end access of arranging the 1st second switch that the LED pedestal is corresponding drives the first end of interface, and the second termination of the second switch that m LED pedestal is corresponding enters to drive the second end of interface;
The 3rd switch is between first switch and second switch of correspondence in the switch element that each LED pedestal is corresponding in the every row LED lamp bar, and with corresponding the first switch and second switch series connection.
7. method of testing the led array drive efficiency, it is characterized in that, be applied to test the platform of led array drive efficiency, the platform of described test led array drive efficiency comprises led array, drives chip and a plurality of switch, described led array comprises at least one row LED lamp bar and drives interface, and every row LED lamp bar comprises a plurality of separate LED pedestals and is arranged on LED lamp on the described LED pedestal; Described driving chip is connected with described led array by described driving interface, is used for driving described led array; Described a plurality of on-off action can light separately or extinguish each the LED lamp in the described led array in led array, or carries out serial or parallel connection with other at least one LED lamps in the described led array, and the method comprises:
Realize that by described a plurality of switches each the LED lamp in the led array can light separately or extinguish, or carry out serial or parallel connection with other at least one LED lamps in the described led array;
Measure the voltage and current of described driving interface;
Obtain the led array drive efficiency according to the voltage and current of described driving interface and the supply voltage and the source current that offer described driving chip;
If the described led array drive efficiency that obtains is less than the threshold value that sets in advance, conducting or opening operation by described a plurality of switches, change the series parallel structure of each LED lamp in the led array, until the led array drive efficiency is more than or equal to the described threshold value that sets in advance.
8. method according to claim 7 is characterized in that, the platform of described test led array drive efficiency also comprises on-off controller, and described a plurality of switches comprise relay and/or analog switch; The I/O port of described on-off controller is connected with the signal input part of described a plurality of switches by wire, is used for controlling the operation of a plurality of switches; Describedly realize that by described a plurality of switches each the LED lamp in the led array can light separately or extinguish, or carry out serial or parallel connection with other at least one LED lamps in the described led array, specifically comprise:
The control signal that sends according to on-off controller is controlled conducting or the opening operation of a plurality of switches, realizes that each the LED lamp in the led array can be lighted separately or extinguish, or carries out serial or parallel connection with other at least one LED lamps in the described led array;
If the described described led array drive efficiency that obtains is less than the threshold value that sets in advance, the connection in series-parallel of regulating each LED lamp in the led array by described a plurality of switches concerns, until the led array drive efficiency specifically comprises more than or equal to the described threshold value that sets in advance:
If the described led array drive efficiency that obtains is less than the threshold value that sets in advance, described on-off controller is regulated conducting or the opening operation of described a plurality of switches, change the series parallel structure of each LED lamp in the led array, until the led array drive efficiency is more than or equal to the described threshold value that sets in advance.
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