EP3593596B1 - Agencement pour faire fonctionner des composants émetteurs de rayonnement et procédé de fabrication de cet agencement - Google Patents

Agencement pour faire fonctionner des composants émetteurs de rayonnement et procédé de fabrication de cet agencement Download PDF

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Publication number
EP3593596B1
EP3593596B1 EP18710025.0A EP18710025A EP3593596B1 EP 3593596 B1 EP3593596 B1 EP 3593596B1 EP 18710025 A EP18710025 A EP 18710025A EP 3593596 B1 EP3593596 B1 EP 3593596B1
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EP
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Prior art keywords
capacitance
devices
arrangement
compensation structure
compensation
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EP18710025.0A
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German (de)
English (en)
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EP3593596A1 (fr
Inventor
Thorsten Frank Baumheinrich
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Ams Osram International GmbH
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Osram Opto Semiconductors GmbH
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0404—Matrix technologies
    • G09G2300/0408—Integration of the drivers onto the display substrate
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0852—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/16—Controlling the light source by timing means

Definitions

  • the invention relates to an arrangement for operating radiation-emitting components and a corresponding manufacturing method for the arrangement.
  • Radiation-emitting components such as LEDs can have production-related parasitic capacitances which differ, for example, from solder-to-solder or also within a solder. This can influence both the time behavior of the individual LEDs and the control behavior of corresponding drivers, so that adjustments such as white balance or color deviations are more difficult, especially with larger arrangements of different colored LEDs, and artifacts occur with rapid changes in contrast.
  • LEDs can be installed sorted according to capacity (so-called “binning”).
  • the driver power or the control rate can be adapted, but a contrast shift or slow control rates must be accepted.
  • US 2008/309594 A1 relates to a device for controlling an electroluminescent matrix display by successively selecting its rows, with a column control circuit which has a circuit which is able to set the display column to a precharge voltage based on the operating voltage of the previous row at the beginning of the selection of a row wherein the column control circuit also comprises a circuit capable of modifying the precharge voltage in accordance with the difference between luminance commands of the previous row and those of the selected row.
  • US 2006/118700 A1 relates to a circuit for controlling a matrix display, which is formed from light-emitting diodes, which is able to successively select rows of the screen and to select columns for each row from a set of selected rows, the voltage of each selected column being adjusted to an operating voltage.
  • the circuit is able to precharge at least the columns to be selected to a precharge voltage before each row is selected from the set of rows.
  • the circuit contains a device for setting the precharge voltage which contains a measuring circuit which is capable of measuring the maximum operating voltage from the operating voltages of the selected columns each time a row is selected from the set of rows; a circuit capable of storing the maximum measured operating voltage; and a circuit capable of adjusting the precharge voltage based on the maximum stored operating voltage.
  • WO 2008/019476 A1 relates to a system and a method for determining a pixel capacity.
  • the pixel capacity is with a pixel age to determine a current correction factor which is used to compensate for the pixel control current in order to take into account the luminance degradation of the pixel caused by the pixel aging.
  • WO 2016/128716 A1 relates to a driver circuit for an LED display for switching a light emitting diode (LED) between a non-illuminated state and a illuminated state for generating light for a display
  • the driver circuit comprising an LED and a driver current regulator which is arranged to be a drive current flow path through the LED selectively opens and closes, whereby the LED is selectively switched between a non-lit state and a lit state, a charge injector unit for inputting charge into the LED to store the charge within the LED via its junction capacitance, a control unit which is arranged to control the charge injector unit so that the charge is inputted into the LED simultaneously with the opening of the control current flow.
  • a driver current regulator which is arranged to be a drive current flow path through the LED selectively opens and closes, whereby the LED is selectively switched between a non-lit state and a lit state
  • a charge injector unit for inputting charge into the LED to store the charge within the LED via its junction capacitance
  • WO 2011/085927 A2 refers to the utilization of the effect that the high parasitic capacitances of an organic light emitting diode (OLED) in pulse width modulation mode (PWM) can lead to an extensive decrease in brightness after each PWM current pulse.
  • OLED organic light emitting diode
  • PWM pulse width modulation mode
  • This can advantageously be used by a first method, which prevents the luminosity in the PWM gaps from falling to 0 in order to prevent a so-called pearl chain effect when the OLED is moved.
  • the afterglow of the OLED is counteracted without taking the pearl chain effect into account in order to achieve better color properties. Instead, the falling edges can be shortened or shortened can be adjusted in a controlled manner.
  • this effect is addressed when the OLED is activated in that the rising edges are shortened at the beginning by increasing the operating current in order to reach the target luminosity value more quickly.
  • the methods are carried out by an operating circuit or control unit.
  • WO 2009/108391 A1 relates to a method and a device for use in digital tuning of a capacitor in an integrated circuit arrangement.
  • a digitally tuned capacitor DTC is described that facilitates digital control of the capacitance applied between a first and second terminal.
  • the first connection comprises a FW + connection and the second connection an HF connection.
  • the DTCs comprise a plurality of subcircuits which are ordered in the significance of subcircuits with the least significant bit (LSB) to the most significant bit (MSB), the plurality of subcircuits with the most significant bit (MSB) being coupled to one another in parallel and each Subcircuit has a first node which is coupled to the first RF connection, and a second node which is coupled to the second FW connection.
  • the DTCs also contain input means for receiving a digital control word, the digital control word comprising bits which are similarly ordered in meaning, from an LSB to an MSB.
  • the object of the present invention is to create an arrangement for operating radiation-emitting components and a corresponding manufacturing method for the arrangement, which enable the components to operate unimpaired and manage without complex sorting processes.
  • the invention relates to an arrangement for operating radiation-emitting components which comprises a plurality of radiation-emitting components.
  • the components are, for example, light-emitting diodes (LEDs).
  • the components can be designed to emit light of different colors, for example as a red (R) LED, blue (B) LED, green (G) LED or white (W) LED.
  • the components can, for example, be arranged in the manner of a line or column (as a so-called “1D array”) or in a matrix-like manner (as a so-called “2D array”).
  • 1D array a so-called “1D array”
  • 2D array a matrix-like manner
  • several differently colored radiation-emitting components can be combined to form units, for example as an RGB element or as an RGBW element.
  • the arrangement is designed by way of example for use in a display device such as an active matrix display or a passive matrix display.
  • the combined units can then form, for example, individual pixels of the display device.
  • the components each have a first capacitance.
  • the first capacitances can in particular be parasitic capacitances of the components.
  • the first capacitance can vary greatly from component to component, for example, due to the manufacturing process.
  • the arrangement comprises a driver circuit for supplying the individual components with electrical energy.
  • the driver circuit is, for example, an integrated circuit that is electrically coupled to the radiation-emitting components.
  • the driver circuit comprises at least one current source and / or at least one voltage source.
  • the driver circuit is designed in particular to control radiation-emitting operation of the individual components.
  • the arrangement comprises a compensation structure which, corresponding to each component, has a variable second capacitance and means for setting the respective second capacitance.
  • the compensation structure is connected to the components in such a way that a total capacitance assigned to a component and dependent on the first capacitance can be set by means of the second capacitance.
  • each component is not to be understood here and in the following as a restriction that the arrangement only has components with a corresponding variable second capacitance.
  • the arrangement can also be designed as a sub-unit of a device, the other, not with one having corresponding variable capacitance connected components.
  • variable second capacitance is understood here and below to mean a respective capacitance of the compensation structure, which can be changed in each case during operation of the arrangement or before commissioning but after the physical completion of the arrangement.
  • the arrangement comprises a communication interface for receiving an actuating signal for setting the respective capacitance.
  • the total capacitance assigned to a respective component is understood here and below to mean a respective capacitance of the arrangement which influences the radiation-emitting operation of the respective component. This includes in particular a capacitance of built-in capacitors that are coupled to the respective component, as well as parasitic capacitances.
  • the total capacitance assigned to the respective component can also be referred to as the total capacitance applied to the component.
  • the arrangement comprises a plurality of radiation-emitting components, each of which has a first capacitance, a driver circuit for supplying the individual components with electrical energy, and a compensation structure, which, corresponding to each component, has a variable second capacitance and means for setting the respective has second capacity.
  • the compensation structure is connected to the components in such a way that a total capacitance assigned to a component and dependent on the first capacitance can be set by means of the second capacitance.
  • the compensation structure is such with the Components interconnected that the respective first capacitance and the respective second capacitance add up to a respective total capacitance applied to the component.
  • the total capacitance can be set at least in some of the components in such a way that a deviation of the total capacitances from a predefined setpoint value is reduced.
  • the total capacitance is preferably adjustable in this way for each of the components.
  • the compensation structure has, corresponding to each component, a compensation element with the respective variable second capacitance and means for setting the respective second capacitance.
  • the compensation element is connected in parallel with the corresponding component.
  • the total capacitance assigned to the respective component results from the sum of the first capacitance of the respective component and the variable second capacitance of the respective compensating element.
  • a simple equalization of the first capacitance of the respective component can thus be carried out by connecting in parallel.
  • the respective compensating element is preferably designed in such a way that a value range of the variable, second capacitance covers an expected value range of the first capacitance of the respective component.
  • the respective compensating element is designed to compensate a first capacitance of a respective component, which is within a predetermined tolerance range, by means of the respective variable, second capacitance to a total capacitance with respect to the respective component, the variable, second capacitance being designed in particular so that a predefined value of the total capacitance can be achieved by all components with a first capacitance within the specified tolerance range.
  • the value range of the variable, second capacitance in this context has the same lower limit as the tolerance range and a value twice as high as the upper limit as the tolerance range.
  • the tolerance range corresponds, for example, to the range of values to be expected for the first capacitance.
  • the range of values to be expected for the first capacitance is, for example, between 0nF and 1000nF.
  • the compensation element comprises, for example, a digitally adjustable, variable capacitor. Such a capacitor can be adapted to any radiation-emitting component, in particular LED.
  • the compensating element is designed in particular to set the variable second capacitance as a function of an actuating signal.
  • the compensating element is preferably set up to hold a second capacitance set in this way also for an operating state of the arrangement in which no actuating signal is received or is present.
  • the driver circuit has, corresponding to each component, in each case an output for supplying the respective component with a predetermined current and / or with a predetermined voltage.
  • the compensation element is connected in parallel with the corresponding output of the driver circuit.
  • the output of the driver circuit can also be referred to as a driver channel.
  • the driver circuit is designed in particular to supply the respective output with electrical energy separately from other outputs of the driver circuit, so that radiation-emitting operation of the components can be controlled individually.
  • the output can also be viewed as an individual current or voltage source for each component. With such a direct control with the driver, each current driver output has an adaptable, configurable load capacity.
  • the respective compensating element, the respective component and the respective output form a parallel circuit.
  • the invention allows the parasitic capacitance in each radiation-emitting component, in particular in each individual LED, for example in LED pixel arrays or linear one-dimensional arrangements, to be adjusted individually.
  • the circuits used for this are parallel to one LED each. This allows the switching times to be adjusted (for example for on / off or first contrast / second contrast).
  • no further measures are required in the controlling current drivers, such as dynamically adapted driver currents.
  • the plurality of radiation-emitting components form a component with the compensation structure.
  • a number of components are integrated in such a unit, each of which provides a partial functionality of the unit.
  • Examples of a structural unit are stacked chips, which are also drawn with the English expression "Die Stacking", several LED chips mounted on a driver chip or several LED chips on a wafer.
  • the components can be arranged one above the other, but also next to one another, for example a driver chip next to an LED chip. The latter type of arrangement can also be referred to using the English-language expression "Side by Side".
  • the same driver chip can be mounted with different LED chip types, so that one exemplary embodiment has red, green and blue LEDs (RGB elements) and another exemplary embodiment has red, green , blue and white LEDs (RGBW elements) and yet another embodiment comprises multiple LED chips of the same type.
  • RGB elements red, green and blue LEDs
  • RGBW elements red, green , blue and white LEDs
  • the multitude of driver channels on the driver chip can be used for different chip types.
  • the structural unit can, for example, form a closed system that can be installed without adapting.
  • the arrangement can in particular be installed without the aforementioned adaptation of the driver circuit.
  • the driver circuit forms a structural unit with the compensation structure.
  • the plurality of radiation-emitting components provided in step a) can be measured individually in step b), for example.
  • the components measured in step b) can already be arranged in a composite, e.g. in a matrix-like manner, and at least partially measured in parallel.
  • the predefined value can, for example, be from a maximum value of the first capacitance of a component of the arrangement depend.
  • the control of the compensation structure can take place in particular by an external control signal.
  • the control of the compensation structure can include, for example, the connection or disconnection of sub-capacitors which are assigned to a respective compensation element.
  • the connection or disconnection takes place in a binary manner: several groups of sub-capacitors of the same capacitance or sub-capacitors of different capacities can be assigned to the respective compensating element, with the capacitance of the groups or the different sub-capacitors in the form of basic capacitance times ⁇ 2 °, 2 1 , 2 2 , 2 3 , ... ⁇ is staggered.
  • the respective compensating element is preferably designed in such a way that a variable, second capacitance that can be set in stages in this way deviates by a maximum of 5% from a value to be set.
  • the compensation structure is controlled in such a way that the respective total capacitance assigned to the components has the same predetermined value or an essentially the same predetermined value for each component.
  • a value of the respective total capacitance assigned to a component corresponds essentially to the same predetermined value if it deviates from this by less than 5%.
  • the specified value is in particular the setpoint value.
  • the compensation structure according to the third aspect mentioned above comprises a plurality of compensation elements, each of which is variable Have capacity and means for setting the respective capacity.
  • the compensation structure comprises a communication interface for receiving an actuating signal for setting the respective capacitance, as well as an input and an output per compensating element for coupling the respective capacitance to an external circuit.
  • the compensation elements are integrated, for example, on an integrated circuit.
  • the compensation structure is set up to selectively provide a configurable capacity at the respective input and output of the compensation elements.
  • the compensation structure is particularly suitable for use in the arrangement according to the first aspect; all features disclosed in connection with the first or second aspect thus also apply to the third aspect and vice versa.
  • each of the compensating elements comprises at least one first switch and at least one capacitor with a first and a second electrode.
  • the respective first electrode of the at least one capacitor is coupled to the at least one first switch.
  • the at least one first switch for coupling the respective capacitance of the at least one capacitor to the external circuit is designed to couple the respective at least one capacitor to the input and / or output of the respective compensating element depending on the control signal.
  • each of the compensating elements comprises at least one second switch.
  • the respective second electrode of the at least one capacitor is coupled to the at least one second switch.
  • the at least one second switch for coupling the respective capacitance of the at least one capacitor to the external circuit is designed to couple the respective at least one capacitor to the input and / or output of the respective compensating element depending on the control signal.
  • the at least one first switch together with the at least one second switch each form a transmission gate.
  • the compensating elements are arranged like a matrix.
  • the compensating elements can be arranged to correspond to the external circuit, so that the input and output of the respective compensating element are each arranged to correspond to individual elements of the external circuit to be coupled to the respective compensating element.
  • the compensation elements are designed as digitally adjustable, variable capacitors.
  • the digitally adjustable variable capacitors each comprise a plurality of metal-insulator-metal capacitors, which each have an aforementioned first and second electrode.
  • the metal-insulator-metal capacitors are arranged between the at least one first and second switch, the first and second electrodes of the metal-insulator-metal capacitors each by means of a vias with the at least one first and second switch is coupled.
  • Figure 1 shows an arrangement 100 for operating radiation-emitting components.
  • the components can be LEDs 112a, 112b, 112c, and 112n, which are arranged, for example, in one or more arrays and are designed for light-emitting use in an active or passive matrix display.
  • each of the LEDs 112a... 112n is assigned to a color area and a pixel of the display for this purpose.
  • LED 112a is assigned to a red color area of a pixel
  • LED 112b is assigned to a green color area of the same pixel
  • LED 112c is assigned to a blue color area of the same pixel
  • LED 112n is assigned to a white color area of the same pixel.
  • the LEDs 112a ... 112n have, for example, due to the manufacturing process, a parasitic capacitance 114a, 114b, 114c or 114n which differs greatly between the LEDs 112a ... 112n (shown here schematically as a capacitor).
  • FIG. 2 shows an embodiment of a further arrangement 200 for operating LEDs 212a, 212b, 212c, 212n with parasitic capacitances 214a, 214b, 214c, or 214n and current sources 232a, 232b, 232c, or 232n of a driver circuit 230, which differ from the arrangement 100 differs by an additional compensation structure 220.
  • the compensation structure 220 has a compensation element 222a, 222b, 222c, 222n for each LED 212a.
  • FIG. 11 shows an exemplary compensating element 222 of the arrangement 200 according to FIG Figure 2 , which is assigned to an LED 212 is.
  • the LED 212 has a parasitic capacitance 214 and is electrically coupled to a current source 232.
  • the compensation element 222 comprises a plurality of capacitors 222-1, 222-2, 222-3, 222-4, 222-5, which each have a switch 226-1, 226-2, 226-3, 226-4, 226-5 the compensating element 222 can be connected or decoupled from it. With switches 226-1.
  • a total capacitance can be achieved for each LED 212a ... 212n, one across the LEDs has essentially the same value.
  • the capacitors 222-1... 222-5 and the control are designed in this context to minimize a deviation from a predetermined value of the total capacitance per LED 212.
  • FIG. 4 shows an exemplary embodiment for producing the arrangement 200 according to FIG Figure 2 .
  • a step a) the LEDs 212a ... 212n are provided and in a step b) their respective parasitic capacitance 214a ... 214n is measured.
  • the distribution of the capacitances 214a ... 214n is measured by suitable measures in such a way that the values of the parasitic capacitances 214a ... 214n of all individual LEDs 212a ... 212n are known, that is for RGB and possibly W per pixel.
  • the compensation structure 220 is provided which, corresponding to each LED 212a... 212n, has the variable capacitance 224a
  • Capacitance 214a ... 214n is set in such a way that each LED 212a ... 212n has essentially the same value of the total capacitance, so that a distribution of the parasitic capacitance 214a ... 214n is balanced.
  • a mechanical and electrical coupling of the compensation structure 220 to the LEDs 212a... 212n can be carried out, for example, in step c).
  • the capacitors 226-1 ... 226-5 of the compensation elements 222a ... 222n are integrated in parallel to the current sources 232a ... 232n on an integrated circuit and together with the LEDs 212a ... 212n form a structural unit.
  • the control of the compensation structure 220 can be carried out before or after step c).
  • a control signal is applied to a communication interface (not shown) of the arrangement 200, in particular the compensation structure 220, such as an SPI or I2C BUS.
  • the control signal has, for example, a binary code with one character for at least each of the switches 226-1... 226-5.
  • the capacitors 222-1... 222-5 can each have the same basic capacitance 224, for example.
  • Figure 5 alternatively to this shows a second variant embodiment of the compensating element 222 according to FIG Figure 2 , in which the capacitance of the capacitors 222-1 ... 222-4 each is 2 x times the basic capacitance 224, i.e. 2 ° * basic capacitance 224 for capacitor 222-1, 2 1 * basic capacitance 224 for capacitor 222-2, 2 2 * basic capacitance 224 for capacitor 222-3, and 2 3 * basic capacitance 224 for capacitor 222-4.
  • the capacitors 222-1 ... 222-4 are in turn coupled to a switch 226-1 ... 226-4.
  • Such a structure according to the second and third variant embodiments advantageously enables a high-resolution and at the same time large area that can be covered by the compensating element 222.
  • the illustrated second embodiment variant of the compensating element 222 can alternatively or in addition to the switches 226-1 to connect a further electrode of the capacitors 222-1 ... 222-4 with respect to the switches 226-1 ... 226-4 to the compensating element 222 or to decouple it from the compensating element 222.
  • the switches 226-1 ... 226-4, 226-1 '... 226-4' can each have an n-channel MOSFET and / or a p-channel MOSFET, for example.
  • the switches 226-1 and 226-1 ', 226-2 and 226-2', 226-3 and 226-3 ', and 226-4 and 226-4' can be designed as transmission gates.
  • An exemplary switch arrangement is referenced in this context Figure 6 shown, the capacitors 222-1 ... 222-4 each having an electrode connected to a common node, for example to ground.
  • FIG. 8 shows an exemplary structure of a compensation element 222 of the compensation structure 220 according to FIG Figure 2 .
  • the compensation element 222 has, for example, three metal-insulator-metal capacitors as capacitors 222-1, 222-2, 222-3, which are stacked vertically on top of one another and each have a first electrode 222-1-1, 222-2-1, or 222-3-1 and a second electrode 222-1-2, 222-2-2, or 222-3-2.
  • the first electrode 222-1-1 ... 222-3-1 of the capacitors 222-1 ... 222-3 is each coupled separately by means of a via 228 to a respective one of the switches 226-1 ... 2226-3.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Led Devices (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Claims (7)

  1. Un arrangement (200) pour le fonctionnement de composants émetteurs de rayonnement comprenant
    - une pluralité de composants émetteurs de rayonnement (212a, 212b, 212c, 212n), les composants ayant chacun une première capacité (214a, 214b, 214c, 214n),
    - un circuit de pilotage (230) pour fournir de l'énergie électrique aux composants individuels, caractérisé en ce que l'arrangement comprend en outre
    - une structure de compensation (220) ayant une seconde capacité variable (224a, 224b, 224c, 224n) correspondant à chaque composant, respectivement, et des moyens pour ajuster la seconde capacité respective, la structure de compensation étant connectée aux composants de sorte qu'une capacité totale associée à un composant et dépendant de la première capacité est ajustable au moyen de la seconde capacité.
  2. L'arrangement selon la revendication 1, dans lequel dans au moins certains des composants, de préférence dans chacun des composants, la capacité totale est réglable de telle manière qu'un écart des capacités totales par rapport à une valeur cible prédéterminée est réduit.
  3. L'arrangement selon l'une des revendications précédentes 1 ou 2, dans lequel
    - la structure de compensation comprend, en correspondance avec chaque composant, un élément de compensation respectif ayant la seconde capacité variable respective et le moyen respectif pour ajuster la seconde capacité respective, et
    - l'élément de compensation est connecté en parallèle avec le composant correspondant.
  4. L'arrangement selon la revendication 3, dans lequel
    - le circuit de pilotage a, en correspondance avec chaque composant, une sortie respective (212a, 212b, 212c, 212n) pour alimenter le composant respectif avec un courant prédéterminé et/ou avec une tension prédéterminée, et
    - l'élément de compensation est connecté en parallèle avec la sortie correspondante du circuit de pilotage.
  5. L'arrangement selon l'une quelconque des revendications précédentes 1 à 4, dans lequel la pluralité de composants émetteurs de rayonnement forme une unité avec la structure de compensation.
  6. Un procédé de fabrication de l'arrangement (200) selon l'une quelconque des revendications précédentes 1 à 5, dans lequel
    a) une pluralité de composants émetteurs de rayonnement (212a, 212b, 212c, 212n) est prévue, les composants ayant chacun une première capacité (214a, 214b, 214c, 214n),
    b) la première capacité respective des composants est mesurée,
    c) une structure de compensation (220) ayant une seconde capacité variable (224a, 224b, 224c, 224n) correspondant à chaque composant et des moyens pour ajuster la seconde capacité respective est prévue, et
    d) la structure de compensation est commandée pour ajuster la seconde capacité respective en fonction de la première capacité mesurée respective, de telle sorte qu'un écart d'une capacité totale associée au composant respectif par rapport à une valeur cible est réduit au moins pour certains des composants, de préférence pour chacun des composants.
  7. Le procédé selon la revendication 6, dans lequel la structure de compensation est commandée de telle sorte que la capacité totale respective associée aux composants a la même valeur prédéterminée ou essentiellement la même valeur prédéterminée pour chaque composant.
EP18710025.0A 2017-03-08 2018-03-07 Agencement pour faire fonctionner des composants émetteurs de rayonnement et procédé de fabrication de cet agencement Active EP3593596B1 (fr)

Applications Claiming Priority (2)

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DE102017104908.8A DE102017104908A1 (de) 2017-03-08 2017-03-08 Anordnung zum Betreiben strahlungsemittierender Bauelemente, Verfahren zur Herstellung der Anordnung und Ausgleichsstruktur
PCT/EP2018/055647 WO2018162579A1 (fr) 2017-03-08 2018-03-07 Agencement pour faire fonctionner des composants émetteurs de rayonnement, procédé de fabrication de cet agencement et structure de compensation

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US4952949A (en) 1989-11-28 1990-08-28 Hewlett-Packard Company LED printhead temperature compensation
FR2879007A1 (fr) * 2004-12-06 2006-06-09 St Microelectronics Sa Adaptation automatique de la tension de precharge d'un ecran electroluminescent
TW200702824A (en) 2005-06-02 2007-01-16 Koninkl Philips Electronics Nv LED assembly and module
CA2556961A1 (fr) 2006-08-15 2008-02-15 Ignis Innovation Inc. Technique de compensation de diodes electroluminescentes organiques basee sur leur capacite
FR2915018B1 (fr) * 2007-04-13 2009-06-12 St Microelectronics Sa Commande d'un ecran electroluminescent.
JP5417346B2 (ja) * 2008-02-28 2014-02-12 ペレグリン セミコンダクター コーポレーション 集積回路素子内でキャパシタをデジタル処理で同調するときに用いられる方法及び装置
KR101341011B1 (ko) * 2008-05-17 2013-12-13 엘지디스플레이 주식회사 발광표시장치
DE102009055048A1 (de) * 2009-12-21 2011-06-22 Tridonic Ag Betrieb organischer Leuchtdioden mittels Pulsweitemodulation
CN102791063A (zh) 2012-07-18 2012-11-21 张从峰 一种自调压led智能模块
GB201502324D0 (en) * 2015-02-12 2015-04-01 Bae Systems Plc Improvements in and relating to drivers
JP6733361B2 (ja) * 2016-06-28 2020-07-29 セイコーエプソン株式会社 表示装置及び電子機器

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DE102017104908A1 (de) 2018-09-13
WO2018162579A1 (fr) 2018-09-13
US11056045B2 (en) 2021-07-06
US20200066204A1 (en) 2020-02-27

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