WO2012136135A1

WO2012136135A1 - Circuit system for clustered use of single components on poor conductor

Info

Publication number: WO2012136135A1
Application number: PCT/CN2012/073496
Authority: WO
Inventors: 蒋伟东
Original assignee: Jiang Weidong
Priority date: 2011-04-02
Filing date: 2012-04-01
Publication date: 2012-10-11
Also published as: CN102740552A; CN102740552B

Abstract

Disclosed is a circuit system employing clustered use of single components on a poor conductor comprising two metal electrodes used for providing supply voltage, and a plurality of single components, each single component having two poles of power being directly connected in parallel to a constant voltage source, the plurality of single components being divided into several rows and columns. The two power poles of the single components in the column direction serving as connecting ends and the poor conductor serving as a connecting lead connect so as to form a column in series, the head ends and tail ends connecting to the two metal electrodes, respectively. The circuit system solves a power supply problem and a signal processing problem related to the clustered use of single components on a poor conductor surface, enabling the circuit to operate normally while greatly reducing the supply current of the entire circuit system.

Description

Circuit system for clustering of unit devices on non-good conductors

The present invention relates to the field of electronic technology, and more particularly to a circuit system in which a unit device is clustered on a non-good conductor. Background technique

The unit device, in particular, the LED lighting unit with the driving IC (hereinafter referred to as the light-emitting unit or the light-emitting point) can be arranged in a dot matrix to form a pixel screen for displaying characters or graphics; or directly using a plurality of light-emitting points Text or graphics, used as a city lighting project.

Referring to FIG. 1 , it is a circuit structure diagram of a conventional dot-matrix pixel screen arranged in a vertical and horizontal direction, υ _α , _υ , υ _{( 1} ,

₂₎ , U _{( 1} , 3) ...... U is a light-emitting unit, and the pixel screen is composed of ixj light-emitting units. Each of the light emitting units is composed of a driving integrated circuit, a light emitting element (such as an LED, an OLED), and peripheral components. The thickened disc on the light-emitting unit indicates the outer lead pad, and the thickened connecting line is the internal power connecting line. The power input end and the output end of the light-emitting unit are directly connected together. The dot matrix pixel screen shown in Figure 1 has a total of i-channel light-emitting units, each of which has j light-emitting units, and the adjacent two light-emitting units of the same road are connected by a power line, a common line, and one or more signal lines. V _cc shown in Figure 1 is the power line, GND is the common line, SDI is the data input signal line, SDO is the data output signal line, CLOCK_IN is the clock input signal line, and CLOCK_OUT is the clock output signal line. If the current of a single lighting unit is _3⁄4 , the supply current of each power supply is Ι _{Ρ 8} = ΙυΧ"'. The more light-emitting units per channel, the greater the power supply current. If the wire of the pixel screen is copper wire or copper foil, when the current is large, the copper wire or the thick copper foil can be thickened. The resistance of the copper wire is negligible, and can be equivalent to zero in circuit design. However, if the wire of the pixel screen is a transparent conductive film, excessively increasing the thickness affects the transparency, and the thickness of the transparent conductive film is not linearly related to the conductivity. When the thickness is increased to a certain extent, the conductivity is increased slowly; The resistance of the transparent conductive film cannot be ignored. Referring to FIG. 2, it is a schematic diagram of an equivalent circuit structure of a conventional dot matrix pixel screen using a transparent conductive film as a wire, and each wire is equivalent to a resistor.

The application of the transparent conductive film is generally applied to a transparent film or a glass surface, and the film coated with the transparent conductive film is simply referred to as a conductive film, and the glass plated with the transparent conductive film is simply referred to as a conductive glass. The resistance of the transparent conductive film is generally expressed by a square resistance or a sheet resistance, and the resistance is approximately in the range of 10 to 500 Ω. For example, a low-impedance conductive glass with an equivalent resistance of 15 Ω is used. By etching, the part that needs insulation is etched. Retaining the portion of the wire, a circuit panel was fabricated, and 20 light-emitting units were mounted on the circuit using a transparent conductive film as a wire. Considering the resistance and voltage, it is assumed that 20 illuminating units are used in parallel on the power supply. Since the power supply is a closed loop, the equivalent resistance is calculated twice, then the power line from the first illuminating point to the last illuminating point. The equivalent resistance is 2χ20χ 15Ω=600Ω. If the operating current of the last illuminating unit is 60mA, the voltage drop on the transparent conductive film is 0.06Ax600Q=36Vo. The operating voltage of the general illuminating unit is 5V, but it is consumed. The voltage on the transparent conductive film will be much larger than the operating voltage of the light-emitting unit. If the supply voltage is increased, most of the power is consumed by the transparent conductive film. If the voltage is lowered, the illuminating unit will not get the normal working voltage, and it will not work properly or even work. If the light-emitting units are supplied in parallel from the viewpoint of current, the current flowing through the power supply line of the first light-emitting unit is the sum of the currents of the respective light-emitting units. Assuming that the current of each illuminating unit is 60 mA, the current flowing through the power line of the first illuminating unit is 60 mAx 20 = 1.2 A. This current is easy for the copper wire, but for the transparent conductive film having a thickness of micron. It is a very difficult task. Since the conductive property of the transparent conductive film is relatively poor and cannot carry a large current, if the existing unit device cluster circuit is directly transplanted onto the surface of the conductive glass, the power supply cannot be normally performed, and the unit device cannot work normally.

Although the invention of transparent conductive films (such as ITO films) has been in existence for decades, and the technology has made great breakthroughs, until now, the light-emitting units made of current-type light-emitting elements such as LEDs and OLEDs have not been transparent in a large area. The application of the conductive film is the most important reason for the power supply problem of the light-emitting unit. Summary of the invention

The embodiment of the invention provides a circuit system for clustering a unit device on a non-good conductor, which can solve the problem of power supply and supporting signal processing of the unit device when the non-good conductor surface is clustered, so that the circuit can work normally and well.

A circuit system for clustering a unit device on a non-good conductor according to an embodiment of the present invention includes two metal electrodes for applying a supply voltage, and a plurality of unit devices; each of the unit devices has two constant voltage sources connected in parallel with each other;

The plurality of unit devices are connected to the two ends by connecting the two ends of the power source with the two poles of the power source as the connection ends and the non-good conductors as the connection wires. Further, the non-good conductor is a transparent conductive film; the two metal electrodes are strip metal electrodes, which are disposed on two sides of the transparent conductive film; j column unit device, each column is formed by connecting i unit devices in series; the unit devices are arranged in an ixj matrix; wherein i and j are both natural numbers, and 1≥2, j≥2.

Wherein, the unit device is a light-emitting unit, which is composed of a driving integrated circuit, an LED light-emitting element and a peripheral component; the power supply two poles of the light-emitting unit are respectively a power source positive pole and a power source negative pole; the light-emitting unit further comprises a power input end and a power output. The ground input terminal and the ground wire output end; the power input end and the power output end are connected to the power source one pole, and the ground wire input end and the ground wire output end are connected to the other end of the power source The power output end and the ground output end of the nth light emitting unit in the same row are connected to the power input end and the ground input end of the adjacent n+1th light emitting unit, and the connecting wire is a transparent conductive film; Where n is a natural number and l ≤ n ≤ j-1.

Further, the light emitting unit has at least one signal input end and a corresponding signal output end; the signal output end of the nth light emitting unit of the same row is connected to the signal input end of the adjacent n+1th light emitting unit The connecting wire is a transparent conductive film.

Further, the circuit system further includes i pre-processing units (PreU), wherein the pre-processing unit is composed of a level shift circuit or an isolation coupling circuit; the front end of the first light-emitting unit of each row is connected to a front end The power supply and the control signal are correspondingly connected to the power input end, the ground line input end and the signal input end of the first light emitting unit via the pre-processing unit; the connecting wire is a transparent conductive film.

The pre-processing unit is integrated inside an illumination unit connected thereto; the constant voltage source is integrated inside the illumination unit.

The constant voltage source is composed of at least one non-linear component that acts as a voltage regulator, and may be a voltage regulator circuit composed of a triode or a field effect transistor or a resistor, or a guide between the base and the emitter of the triode. The voltage is used as a reference voltage; or the constant voltage source is a voltage stabilizing circuit composed of a Zener diode, a triode or a FET, and a resistor, and the voltage of the Zener tube is used as a reference voltage; or, the constant voltage source It is a controllable constant voltage source circuit, including a constant voltage source dynamic control module.

The circuit device provided by the embodiment of the present invention for clustering on a non-good conductor uses two metal electrodes with good conductivity to supply a power supply voltage, and a plurality of unit devices are connected in series through a transparent conductive film, and the first and second ends are respectively connected. On a two metal electrode, and a constant voltage source in parallel with the two poles of the power supply of each unit device, so that each unit device obtains a suitable operating voltage, so that the circuit can be normal and good. Work well. The invention solves the problem of power supply and signal connection when the unit device is applied to a non-good conductor surface cluster such as a transparent conductive film. Small, can be used for the matrix wiring of the general transparent conductive film circuit, solving the problem that the current-type light-emitting device includes a general-sized display screen, and the power supply is provided when the transparent conductive film line is very thin; large, the light-emitting unit can be disposed on the transparent conductive film The device and the wiring constitute a large-area transparent full-color display film or a transparent full-color display panel unit, which is applied to the glass curtain wall or the window of the building to form a transparent full-color glass curtain wall display or a decorative transparent full-color luminescent glass curtain wall. The full-color display becomes transparent, simple and beautiful, and will be integrated into the building, becoming an integral part of architectural design and decoration. DRAWINGS

1 is a schematic diagram showing the circuit structure of a conventional dot-matrix pixel screen arranged in a vertical and horizontal direction;

2 is a schematic diagram showing an equivalent circuit structure of a conventional dot matrix pixel screen using a transparent conductive film as a wire;

3 is a schematic diagram showing the circuit structure of a first embodiment of a circuit system in which a unit device provided by the present invention is clustered on a non-good conductor;

4 is a schematic diagram showing the circuit structure of a second embodiment of a circuit system in which a unit device provided by the present invention is clustered on a non-good conductor;

5 is a schematic diagram showing the circuit structure of a third embodiment of a circuit system in which a unit device provided by the present invention is clustered on a non-good conductor;

6 is a schematic structural view of a first embodiment of a light-emitting unit integrated with a constant voltage source according to the present invention; FIG. 7 is a schematic structural view of a second embodiment of a light-emitting unit integrated with a constant voltage source according to the present invention; FIG. 9 is a schematic structural view of a fourth embodiment of a light-emitting unit integrated with a constant voltage source provided by the present invention; FIG. 10 is a schematic structural view of a fourth embodiment of a light-emitting unit integrated with a constant voltage source provided by the present invention; A schematic structural view of a fifth embodiment of a light-emitting unit integrated with a constant voltage source provided by the invention;

Figure 11 is a schematic structural view of a sixth embodiment of a light-emitting unit integrated with a constant voltage source according to the present invention;

12 is a schematic structural view of a fourth embodiment of a circuit system in which a unit device provided by the present invention is clustered on a non-good conductor;

Figure 13 is a fifth embodiment of the circuit system for the clustering of unit devices provided on the non-good conductors provided by the present invention. Schematic diagram of the structure of the embodiment;

Figure 14 is a block diagram showing the construction of a sixth embodiment of a circuit system in which a unit device of the present invention is applied to a cluster on a non-good conductor. detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The object of the present invention is to solve the problem of power supply and signal connection of a unit device, particularly an LED lighting unit with a driving IC, when clustered on a non-good conductor material, and overcome the material by an innovative and unique design of the circuit. Insufficient conductivity, so that the circuit can work normally and well. The non-good conductor material is a material which is inferior in guiding electrical properties with respect to metal. The present invention is described by way of example only as a transparent conductive film.

The circuit device provided by the present invention for clustering a unit device on a non-good conductor comprises two metal electrodes for applying a supply voltage, and a plurality of unit devices; a power source of each unit device is connected in parallel with a constant voltage source; The plurality of unit devices are connected with two poles of the power source as the connection ends, and the non-good conductors are used as the connection wires, and are connected in series in a series, and the first and second ends are respectively connected to the two metal electrodes. Preferably, the non-good conductor is a transparent conductive film.

It should be noted that only one column of cell devices may be connected between the two metal electrodes, or a plurality of columns of cell devices may be connected. The unit device may be a light unit or other load circuit. The circuit system in which the unit devices provided in the embodiments of the present invention are clustered on a non-good conductor is described in detail below by taking only ixj light-emitting units arranged in a matrix between the two metal electrodes as an example.

The light emitting unit of the embodiment is an LED full color light emitting unit with a driving IC, which is composed of a full color driving integrated circuit, at least three three primary color LED light emitting elements and peripheral components, and can be controlled by an externally input signal to control the light emitting unit. Switch status and brightness. The two poles of the power supply unit are the positive pole of the power supply and the positive pole of the power supply. The light emitting unit further includes a power input end, a power output end, a ground line input end, and a ground line output end; wherein, the power input end and the power output end are connected to the positive pole of the power supply.

The circuit connection mode of the light-emitting unit includes three cases: multiple signal connection mode, single signal connection Mode and no signal line connection, where each signal can use single or multiple signal lines. Description will be made below with reference to Figs. 3 to 5 .

Referring to Fig. 3, there is shown a schematic structural view of a first embodiment of a circuit system in which a unit device of the present invention is clustered on a non-good conductor. The light emitting unit of this embodiment adopts a multi-channel signal connection manner.

As shown in FIG. 3, two thick horizontal lines marked with V _cc and GND represent two metal electrodes; two metal electrodes are strip electrodes having good conductivity;; in specific implementation, two strip metals The electrodes are generally arranged in a lateral direction parallel to each other; however, if two metal electrodes are mounted on a curved surface (for example, a curved, curved glass), the two metal electrodes may also be arranged in an arc shape or obliquely. Between the two strip-shaped metal electrodes, a j-column unit device is connected, and each column is formed by connecting i unit devices in series; the unit devices are arranged in an ixj matrix; wherein i and j are both natural numbers (ie, iEN, j ^N) ), and 1≥2, j≥2. U ( 1 , 1 » U ( 1 , ₂₎ , U ( i , 3 ) ... U ₍₁ , j ) shown in Figure 3 is a unit device, CV ( 1 , 1 » CV ₍₁ , ₂₎ , CV

(1, 3) ...... CV is a constant voltage source. The power supply of each unit device is connected in parallel with a constant voltage source. The single component is an LED lighting unit with a driver IC.

In the ixj matrix composed of the illuminating units, the power output end and the ground output end of the nth illuminating unit of the same row correspond to the power input end and the ground input end of the adjacent n+1th illuminating unit. Connected, the connecting wire is a transparent conductive film; wherein n is a natural number (ie, nEN), and l≤n≤j-1. That is, the power supply poles of two adjacent light-emitting units of the same row are connected correspondingly.

In addition, the light emitting unit of the embodiment has at least one signal input end and a corresponding signal output end for receiving an external control signal, and controlling the switching state and brightness of the light emitting unit. Figure 3 illustrates only the lighting unit including two signal inputs (ie, SDI input and CLOCKJN input) and corresponding signal outputs (ie, SDO output and CLOCK_OUT output). As shown in FIG. 3, in the ixj matrix composed of the light-emitting units, the signal output end of the n-th light-emitting unit of the same row is connected to the signal input end of the adjacent n+1-th light-emitting unit. That is, the signal terminals of two adjacent light-emitting units in the same row are also connected correspondingly.

In a specific implementation, two strip-shaped metal electrodes with good conductivity can be disposed on any two sides of the surface of the transparent conductive film, and after a voltage is applied to the two metal electrodes, an electric field can be generated on the transparent conductive film. On the transparent conductive film, by etching, that is, etching away the portion requiring insulation, and retaining the portion as the wire, a circuit panel is formed, and the light-emitting units arranged in a matrix are pasted on the circuit panel. The power supply poles are connected in series to the strip metal electrode through a transparent conductive film, and A constant voltage source is connected in parallel to the power supply of each lighting unit, so that each lighting unit obtains a suitable working voltage, and also provides a current loop for the entire lighting unit series circuit, so that the circuit can work normally and well.

The illuminating unit shown in FIG. 3 adopts a multi-channel signal connection mode, and each row of the illuminating unit in the ixj matrix corresponds to input one signal. For the multi-channel signal connection method, the number of groups of light-emitting units connected in series between the electrodes on both sides of the transparent conductive film is determined according to the number of signals, because the power supply circuits of the light-emitting units are connected in series, so the ground lines of the respective light-emitting units themselves That is, the GND_(i) terminal is "floating", and the SDI_(i) and CLOCK_IN_(i) of the i-th row in FIG. 3 generate different DC potential differences from the total ground GND. In order to solve the above-mentioned DC potential difference and ensure signal transmission of the front and rear stages of the light-emitting unit, in this embodiment, a pre-processing unit is provided at the input end of each row of the light-emitting unit matrix. The equivalent resistance of the transparent conductive film connected by the broken line in the figure indicates that it may or may not be considered when actually designing the circuit, and the following figures are the same.

As shown in FIG. 3, the circuit system further includes i pre-processing units, namely PreU(l), PreU(2), ...,

PreU(i), the pre-processing unit is composed of a level shift circuit or an isolated coupling circuit. In the ixj matrix composed of the light-emitting units, the input end of the first light-emitting unit of each row is connected to a pre-processing unit; the connecting wires are transparent conductive films.

Referring to Fig. 4, there is shown a circuit configuration diagram of a second embodiment of a circuit system in which a unit device provided by the present invention is clustered on a non-good conductor. The light emitting unit of this embodiment adopts a single signal connection mode.

Compared with the first embodiment described above, the difference in this embodiment is that the illumination unit arranges the matrix of the ixj in a reciprocating manner, that is, the output end of the last illumination unit of the first row and the first of the second row. The input terminals of the illumination unit are connected, the output of the last illumination unit of the second row is connected to the input of the first illumination unit of the third row, and so on. The ixj illuminating unit matrix adopts a single signal connection mode, and the single signal is input from the input end of the first illuminating unit of the first row, and sequentially transmitted to the last illuminating unit of the i th row.

However, for the single-channel signal connection method, the light-emitting units that are originally connected in parallel and arranged along the signal transmission direction are divided into several segments, and then these segments are connected in series along the direction of the supply current, thus, segmentation The signal connection to the segment (or understood to be the turning point in the direction of the signal) also produces a DC potential difference due to the series connection between the upper and lower segments. In order to solve the above-mentioned DC potential difference and ensure signal transmission of the front and rear stages of the light-emitting unit, in this embodiment, a pre-processing unit is provided at the signal connection between the segment and the segment. As shown in FIG. 4, the circuit system further includes i-1 pre-processing units, namely PreU (2), PreU (3), ..., PreU (i), and the pre-processing unit is A level shift circuit or an isolated coupling circuit is formed. In the ixj matrix composed of the light-emitting units, the power output end, the ground line output end, and the signal output end of the last light-emitting unit of the m-th row pass through a pre-processing unit, and the first light of the m+1th line The power input end, the ground input end and the signal input end of the unit are correspondingly connected, and the connecting wire is a transparent conductive film; wherein m is a natural number (ie, mEN), and l≤m≤i-1.

In a specific implementation, the foregoing pre-processing unit may be a separate circuit unit, and may also be integrated inside a light-emitting unit connected thereto, so that the number of visible components on the panel where the transparent conductive film is located may be reduced, and even This part is integrated into the circuit chip, and is made into a full-color LED driver integrated circuit chip with input signal pre-processing function. The isolated coupling circuit and the level shifting circuit can have various structures, and are described in the teaching and technical books of the existing electronic circuits. Those skilled in the art are well-known technologies. Therefore, the present embodiment does not have a front processing unit. The structure is described in detail.

Referring to Fig. 5, there is shown a circuit configuration diagram of a third embodiment of a circuit system in which a unit device of the present invention is clustered on a non-good conductor. The light emitting unit of this embodiment adopts a signalless line connection mode.

As shown in FIG. 5, the light-emitting unit of this embodiment has only a power supply end and does not have a signal input end and a signal output end. The ixj illuminating unit matrix adopts no signal line connection mode, and each illuminating unit is provided with a receiving and demodulating module (hereinafter referred to as DEMOD module).

There are two kinds of signal line connection methods. One is to modulate the digital signal in the wireless electromagnetic wave or to modulate it in the power transmission line. The light-emitting unit obtains the digital signal through the power transmission line, and the digital signal is modulated in the power transmission line, that is, through The power line transmits digital signals. After the digital unit receives the digital signal, the full-color LED driver integrated circuit is controlled by the DEMOD module to complete the display of the brightness information. The other is a wireless electromagnetic signal transmission method in which a digital signal is modulated in a wireless electromagnetic signal to transmit a digital signal through space. In terms of the volatility theory of light in physics, light waves, including visible light and invisible light, belong to the category of electromagnetic waves. Therefore, the method of transmitting digital signals by infrared rays also belongs to the above-mentioned range of no signal line connection. The light-emitting unit shown in Fig. 5 adopts a no-signal line connection method. Since there is no signal line, there is no potential difference problem when the signal lines are connected in series power supply. However, in order to obtain a normal operating voltage for each lighting unit, a constant voltage source must be connected in parallel with the power supply of the lighting unit.

The constant voltage source connected in parallel between the positive and negative sides of the power supply of each light-emitting unit can be expressed as a constant voltage source in the equivalent diagram, and can be expressed as a parallel voltage-stabilizing circuit in a specific circuit. The constant voltage source is composed of several electronic components. It includes at least one nonlinear element that acts as a constant voltage. Figures 3 to 5 separately draw a constant voltage source next to the light-emitting unit to illustrate the power connection problem. In a specific implementation, the constant voltage source can be integrated inside the light emitting unit.

Referring to FIG. 6 to FIG. 8, FIG. 8 is a schematic structural view of a light-emitting unit integrated with a constant voltage source, wherein LU is a light-emitting unit portion, and CV is a constant voltage source portion. The constant voltage source is composed of at least one non-linear element that acts as a voltage regulator and peripheral electronic components, and is integrated inside the light-emitting unit. Nonlinear components include Zener diodes, transistors, FETs and other electronic components.

As shown in Fig. 6, the constant voltage source CV is a voltage stabilizing circuit composed of a Zener diode, a triode, and a resistor, and the voltage of the Zener tube is used as a reference voltage.

As shown in Fig. 7, the constant voltage source is a voltage stabilizing circuit composed of a triode and a resistor, and the conduction voltage between the base and the emitter of the triode is used as a reference voltage.

As shown in Fig. 8, the constant voltage source CV is a voltage stabilizing circuit composed of a Zener diode, a triode, and a resistor, and the voltage of the Zener tube is used as a reference voltage.

Parallel regulated power supply is based on the load current requirement. By adjusting the current flowing through itself, the sum of the current flowing through the load and the current flowing through it is kept at a fixed value, thereby achieving the purpose of voltage regulation. The current value is the maximum current value that the regulated power supply can provide for the load. Generally, the working current of LED is constant current 20mA. If it is a full-color light-emitting unit, the current of three three-color LEDs of RGB is constant current 60mA, which means that the parallel regulated power supply connected in parallel with the power supply of the light-emitting unit needs to stabilize the current. For this value, the purpose of voltage regulation can be achieved.

A constant voltage source is connected across the power supply of each lighting unit to solve the problem of the operating voltage of the lighting unit, but it will bring a certain power consumption. To further optimize the power supply of the lighting unit, the parallel regulated power supply can be made into a controllable floating. Constant voltage power supply to maximize power efficiency and reduce power consumption.

Referring to FIG. 9 to FIG. 11 , it is a schematic structural diagram of a light-emitting unit integrated with a controllable constant voltage source circuit, wherein LU (Light Unit) is a light-emitting unit part, CV is a constant voltage source part, and constant voltage source includes constant voltage source dynamic control. Module (Dynamic Voltage Control). Figures 9 to 11 show three controllable constant voltage power supply circuits with different control signal connections, but the control principle is the same.

As shown in Figure 9, the controllable constant voltage source has a separate control signal input terminal (VC_IN) and an output terminal (VC_OUT), and the constant voltage source control module output transistor is a triode;

As shown in Figure 10, the controllable constant voltage source has a separate control signal input (VC_IN) and output. (VC_OUT), and the clock input is taken from the clock signal of the light-emitting unit, and the output tube of the constant-voltage source control module is a FET, and of course, it can also be a triode;

As shown in FIG. 11, the control signal of the controllable constant voltage source is from the internal chip of the light emitting unit. In a specific implementation, each constant voltage source dynamic control information may be added to a digital signal output by the display system controller for controlling the light emitting unit, and the constant voltage source is controlled by the internal chip of the light emitting unit, thereby eliminating the peripheral constant. Voltage source control signal input (VC IN), output (VC OUT). The constant voltage source control module output tube is field effect. Since the constant voltage source dynamic control module is composed of many electronic components, in the specific implementation, the constant voltage source dynamic control module can be made into an integrated circuit and integrated in the constant voltage source. Even integrated into the interior of the lighting unit, thereby reducing the volume of the unit device. The supply voltage of the two ends of the conductive copper strip is ^, for the matrix composed of mxn light-emitting units, there are m columns and n rows of light-emitting units, and each column has m light-emitting units connected in series to the conductive copper strips on both sides of the conductive film glass. At some point, unless a stable monochrome is displayed, in general, the color and brightness of each of the light-emitting points on the column will be different, and the required current flowing through each of the light-emitting units on a certain column is ^{1 U} [ ^:L 〕, 3⁄4(2^) , - - - ^ ₅ (m ) _y is also different, but there is always a certain current is the largest, recorded as

Ma ^ i( _ffi ^]. If you want each light-emitting unit to obtain the same working voltage at this time, you can connect an adjustable resistor ^RvR ( ) in parallel with the power supply unit power supply, and adjust the resistance value to make it flow through ^R. The sum of the current on the current flowing through the illuminating unit is equal to the maximum value of the current required in all of the illuminating units in the column, as follows:

Max _m4) ] is the column matrix ^l - '''' ku ■ '' [( ) ] Find the maximum function, where l ≤ i ≤ m, l < j < n, m ^ N, η Ε Ν.

In order to express the integral form, the current change period required for one light-emitting unit is divided into several minute time periods, and the adjacent time between the time periods is t _{1 ;} t ₂ , and the current value of the light-emitting unit is the vertical coordinate, The time is the abscissa, and during this time period, the current changes of all the light-emitting units in the column are investigated, and there is always a certain hair. The current curve of the light unit and the area enclosed by the time axis are the largest, with ^{|3⁄4 5 £} [ ^! («)^ ^ι ^ύ\ as a function of the vicinity of the maximum point in all current curves in the column. If all the light-emitting units in the column are obtained with the same power supply voltage, the current ¹ curve of the light-emitting unit connected in series on the column in the time period and the area enclosed by the time period and the flow through are connected in parallel in the light-emitting unit. The sum of the current change curve on ^R ( ) at both ends of the power supply and the area enclosed by the time is equal to the maximum value of the above area, expressed as an integral form:

The following is an example of the operation of a circuit system using a controllable constant voltage source.

It is assumed that the three light-emitting units U u ₂ , u ₃ are connected in a series with the two poles of the power source as a connection end, and then connected to the total power supply (ie, connected to the two strip-shaped metal electrodes). Each of the two ends of the power supply unit is connected in parallel with a constant voltage source, respectively CV^CV ₂ and CV ₃ , and their constant voltage values are:

Although the brightness of the LED in the general illumination unit is controlled by constant current PWM, especially in the case where there is capacitance across the power supply of the illumination unit, the current flowing into the illumination unit will be relatively smooth and continuous and will be proportional to or approximate to the brightness. It is proportional, so it can be analyzed by the method of static equivalent resistance current. When a certain frame of picture is displayed at a certain time in three light-emitting units, according to different digital full-color brightness information obtained at the input end of each light-emitting unit, a corresponding current flows into the three light-emitting units, assuming that their currents are respectively:

Iui=50mA; I _U2 =20mA; I _U3 =10mA;

Among the three currents, the maximum current is 50mA. Because it is connected in series, the entire series circuit must be able to supply 50mA. In this case, three parallel constant voltage sources CV CV ₂ and CV _{3 are} required to be connected in series. The currents of the loop are:

This ensures that the current flowing into the entire series loop is consistent, ie I _P =I _P1 =I _P2 =I _P3 =50mA. In a series circuit, if the currents are equal, the voltage across the power supply of each unit is naturally equal. At this time, if the light-emitting unit and the constant voltage source are equivalent to one resistor, they are Ru^ R _U2 , R _U3 and Rc _V1 , respectively.

RCV2 Rc _V3 . Parallel connection of the light-emitting unit and the constant voltage source is equivalent to a resistor, respectively R _P1 , R _P2 , Rp ₃ , then, these equivalent resistances are:

When another frame is displayed at another time, another set of new digital full-color luminance information obtained by the input end of the light-emitting unit is assumed, and the corresponding currents flowing into the three light-emitting units are respectively:

At this time, the maximum current among the three currents is 25 mA, and the currents flowing through the three constant voltage sources are respectively:

I _C vi=10 mA; I _CV2 =0 mA; I _CV3 = 20 mA;

Then the equivalent resistance at this time will become:

It can be seen from the above data that the current value of the light-emitting unit that requires the largest current in the series circuit can be used as the operating current value flowing through the entire series circuit, and at the same time, the working of the light-emitting unit can be performed under different operating currents of the light-emitting unit. If the voltages are equal, as long as the equivalent resistance of the constant voltage source connected in parallel is adjusted, the equivalent resistance of the light-emitting unit and the constant voltage source can be equalized, and the operating voltage of the light-emitting unit can be made the same.

The above method can ensure that the supply voltage of each light-emitting unit in the series circuit is the same, but it cannot guarantee the stability at a certain value. The above calculation is for explaining the problem and the voltage is assumed to be constant 5V because the pressure of the transparent conductive film is not considered. drop. In the entire series circuit, since the equivalent resistance of the transparent conductive film is constant, when the current is reduced, the voltage drop V _ITO =I _ITO xR _ITO on the transparent conductive film is also reduced, thus being applied to the light emitting unit. The voltage will rise. The operating voltage of the driving integrated circuit of the light-emitting unit is between 3.3V and 5V. Under the premise of not affecting the stable normal operation, it is allowed to change within a certain range. For a specially designed driving IC with a wide range of operating voltage, No problem anymore. In fact, it is not necessary to maintain the voltage of the lighting unit supply voltage, as long as the entire series circuit can provide the current value of the current unit with the largest current in the entire series circuit at this moment. In a series circuit, as long as the equivalent resistance is the same, the operating voltage will naturally be the same. The above method for dynamically adjusting the equivalent resistance value of the constant voltage source connected in parallel on the light emitting unit according to different currents flowing into the light emitting unit at different times, that is, the method of parallel controllable constant voltage source, compared with the simple constant voltage source circuit , can further reduce power consumption.

The above-mentioned controllable constant voltage source circuit can be integrated in the LED driving integrated circuit of the light emitting unit, thereby further reducing the volume of the light emitting unit.

In addition, the on-voltage of the LED is about 2V-3V, and the LEDs of different colors have different on-voltages, so that the LEDs can be determined according to different screen contents at different times. The operating voltage of the driving integrated circuit can be wide, that is to say, the working voltage of the light emitting unit can be determined according to different screen contents displayed at different times without affecting the working stability of the driving IC, and the above dynamic adjusting mechanism can be used simultaneously. Adjust the total supply voltage of the entire series supply circuit, that is, the dynamic adjustment method of the total power supply voltage. If the circuit system adopts the method of parallel controllable constant voltage source, and the dynamic adjustment method of the total power supply voltage, and the transparent conductive film with relatively small surface resistance, the useless power consumption of the display can be minimized.

Referring to FIG. 12, it is a schematic structural diagram of a fourth embodiment of a circuit system in which a unit device provided by the present invention is clustered on a non-good conductor;

The circuit system of the fourth embodiment is formed by splicing a plurality of unit panels, and each of the unit panels adopts the circuit structure of the first embodiment. Figure 12 shows only three unit panels, and the splicing of more unit panels is similar.

Referring to FIG. 13, FIG. 13 is a schematic structural diagram of a fifth embodiment of a circuit system in which a unit device provided by the present invention is clustered on a non-good conductor;

The circuit system of the fifth embodiment is formed by splicing a plurality of unit panels, and each unit panel adopts the circuit structure of the second embodiment described above, and the signal input and signal output of each unit panel are located on different sides of the unit panel. Happening. Figure 13 shows only three cell panels, and more is how the cell panels are stitched together.

Referring to FIG. 14, is a schematic structural diagram of a sixth embodiment of a circuit system in which a unit device provided by the present invention is clustered on a non-good conductor;

The circuit system of the sixth embodiment is formed by splicing a plurality of unit panels, and each of the unit panels adopts the circuit structure of the second embodiment described above, and the signal input and signal output of each unit panel are located on the same side of the unit panel. Happening. The fourth to sixth embodiments can also be understood as being composed of ixj illuminating units. The case where the display is assigned to a different unit panel.

The circuit device for cluster application of the unit device provided on the non-good conductor is provided by two strip-shaped metal electrodes with good conductivity, and the power supply voltage of the plurality of unit devices is connected in series through the non-good conductor. After the connection, the first and the last ends are respectively connected to the two metal electrodes, and a constant voltage source is connected in parallel with the two poles of the power supply of each unit device, and the characteristics of the non-good conductor having a certain resistance are skillfully utilized, which is disadvantageous, so that each The illuminating unit obtains a normal operating voltage and can also greatly reduce the supply current of the entire circuit system.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. These improvements and retouchings are also considered. It is the scope of protection of the present invention.

Claims

Rights request

A circuit system for clustering a unit device on a non-good conductor, comprising: two metal electrodes for applying a supply voltage, and a plurality of unit devices; each of the unit devices has a constant voltage connected in parallel with the two poles The plurality of unit devices have two terminals of the power source as the connection ends, and the non-good conductors are used as the connection wires, and are connected in series in a series, and the first and the last ends are respectively connected to the two metal electrodes.

2. The circuit system for clustering a unit device according to claim 1, wherein said non-good conductor is a transparent conductive film; said two metal electrodes are strip metal electrodes Between the two strip-shaped metal electrodes, a j-column unit device is connected, and each column is formed by connecting i unit devices in series; the unit devices are arranged in an i X j matrix; wherein, i and j are natural numbers, and 12 j ^2 o

3. The circuit device for clustering a unit device according to claim 2, wherein the unit device is a light emitting unit, and is driven by a full color integrated circuit, at least three trichromatic light emitting elements, and a periphery. The component unit comprises: a power input end, a power output end, a ground line input end, and a ground line output end;

The power output end and the ground output end of the nth light emitting unit in the same row are connected to the power input end and the ground input end of the adjacent n+1th light emitting unit, and the connecting wires are transparent conductive films; , n is a natural number, and lnj—l.

4. The circuit system as claimed in claim 3, wherein the illuminating unit comprises a modem module for receiving a modulated signal modulated in a power source; or The lighting unit includes a wireless receiving module for receiving a wireless control signal.

5. The circuit system as claimed in claim 3, wherein the light emitting unit has at least one signal input end and a corresponding signal output end; the nth illumination of the same row The signal output end of the unit is connected to the signal input end of the adjacent n+1th light emitting unit, and the connecting wire is a transparent conductive film.

6. The circuit system as claimed in claim 5, wherein the circuit system further comprises i pre-processing units, and the pre-processing unit is configured by a level shifting circuit. Or an isolation coupling circuit; the front end of the first illumination unit of each row is connected to a pre-processing unit; the control signal is correspondingly connected to the signal input end of the first illumination unit via the pre-processing unit; a transparent conductive film;

Or the circuit system further includes ii pre-processing units, wherein the pre-processing unit is composed of a level shift circuit or an isolated coupling circuit; The power output end, the ground line output end, and the signal output end of the last illumination unit of the mth line pass through a pre-processing unit, and the power input end and the ground line input end of the first illumination unit of the m+1th row, The signal input end is correspondingly connected, and the connecting wire is a transparent conductive film; wherein m is a natural number and lmi is 1.

7. A circuit system for clustering a unit device on a non-good conductor according to claim 5 or 6, wherein said pre-processing unit is integrated inside a light-emitting unit connected thereto.

8. A circuit system for clustering a unit device according to claims 1 to 6 on a non-good conductor, the constant voltage source being integrated inside the light-emitting unit.

9. A circuit system for clustering a unit device according to claim 8 on a non-good conductor, characterized in that said constant voltage source is composed of at least one non-linear element that acts as a voltage regulator.

10. The circuit device of the cluster device of claim 8, wherein the constant voltage source is a controllable constant voltage source circuit, comprising a constant voltage source dynamic control module; The voltage source dynamic control module is integrated inside the constant voltage source or integrated on the full color drive integrated circuit of the light emitting unit.