WO2020103193A1 - 驱动电路和显示面板 - Google Patents

驱动电路和显示面板

Info

Publication number
WO2020103193A1
WO2020103193A1 PCT/CN2018/119272 CN2018119272W WO2020103193A1 WO 2020103193 A1 WO2020103193 A1 WO 2020103193A1 CN 2018119272 W CN2018119272 W CN 2018119272W WO 2020103193 A1 WO2020103193 A1 WO 2020103193A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
electrically connected
signal
branch
feedback
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/119272
Other languages
English (en)
French (fr)
Inventor
黄笑宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HKC Co Ltd
Original Assignee
HKC Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HKC Co Ltd filed Critical HKC Co Ltd
Priority to US17/270,203 priority Critical patent/US11663943B2/en
Publication of WO2020103193A1 publication Critical patent/WO2020103193A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof

Definitions

  • the present application relates to the field of display, in particular to a driving circuit and a display panel.
  • Thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal, TFT-LCD) panel is one of the main products of flat panel display, and has become an important display platform in modern information technology industry and video products.
  • the driver chip on the printed circuit board is mainly used to provide power and signals to the display area, so as to realize image display.
  • the aging test is mainly used to detect whether there are problems such as liquid crystal cell line defects and slight damage to electronic components. These problems easily cause defects in the display panel during user use, such as wire breakage, corrosion, etc., which seriously affect the quality of the product.
  • the conventional aging test design cannot meet customers' needs for the diversity of voltages used in the aging test process.
  • the present application provides a driving circuit and a display panel to solve the situation in which the customer's diverse requirements for the voltage required for aging detection cannot be met.
  • An embodiment of the present application provides a driving circuit, including:
  • Driver chip used to output working voltage
  • a detection signal generating circuit for receiving a first voltage signal and a second voltage signal, and generating a detection control signal for ageing detection based on the first voltage signal and the second voltage signal;
  • a feedback circuit the first input terminal of the feedback circuit is electrically connected to the voltage output terminal of the driving chip, the second input terminal of the feedback circuit is electrically connected to the output terminal of the detection signal generation circuit, and the feedback circuit
  • the first output terminal is electrically connected to the feedback voltage input terminal of the driving chip, and is used to receive the detection control signal output by the detection signal generating circuit and the operating voltage provided by the driving chip, according to the detection control signal
  • the operating voltage generates a feedback voltage and outputs it to the driving chip, so that the driving chip adjusts the operating voltage to a voltage required for aging detection according to the feedback voltage.
  • the detection signal generation circuit includes:
  • a voltage input branch for receiving the first voltage signal and the second voltage signal
  • the judgment branch is electrically connected to the voltage input branch, the first voltage signal and the second voltage signal are input to the judgment branch through the voltage input branch, and the judgment branch is based on the first A voltage signal and the second voltage signal generate the detection control signal.
  • the voltage input branch includes:
  • the first signal input terminal is electrically connected to the judgment branch
  • the second signal input terminal is electrically connected to the judgment branch and the first signal input terminal, respectively;
  • the first resistor has one end electrically connected to the first signal input terminal and the other end electrically connected to the second signal input terminal.
  • the judgment branch includes a comparator, a positive input terminal of the comparator is electrically connected to the first signal input terminal, and a negative input terminal of the comparator is connected to the first resistor And the second signal input terminal is electrically connected, and the comparison signal output terminal of the comparator is electrically connected to the first input terminal of the feedback circuit.
  • the feedback circuit includes:
  • the adjustment branch is electrically connected to the voltage output end of the driving chip through the first input end of the feedback circuit, and the adjustment branch is connected to the drive through the first output end of the feedback circuit
  • the feedback voltage input terminal of the chip is electrically connected to generate a feedback voltage according to the detection control signal and the operating voltage and output to the driving chip, so that the driving chip adjusts the operating voltage according to the feedback voltage To the voltage required for aging testing;
  • a switch branch the first input end of the switch branch is electrically connected to the comparison signal output end of the comparator, and the second input end of the switch branch passes through the second output end of the adjustment branch
  • the adjustment branch is electrically connected, and the output end of the switch branch is electrically connected to the feedback voltage input end of the drive circuit and the first output end of the feedback circuit, for receiving the detection control signal, and according to the The detection control signal controls the feedback voltage output by the adjustment branch.
  • the switch branch includes a switch tube, a gate is connected to the signal output terminal of the comparator, a drain is connected to the feedback voltage input terminal of the driving chip and the first output terminal of the feedback circuit Electrically connected, the source electrode is electrically connected to the second output end of the adjustment branch.
  • the adjustment branch includes:
  • a second resistor one end is electrically connected to the feedback voltage input end of the driving chip, and the other end is grounded;
  • a third resistor one end is electrically connected to the voltage output end of the drive chip, and the other end is electrically connected to the second resistance, the feedback voltage output end of the drive chip and the drain of the switch tube;
  • the fourth resistor has one end electrically connected to the source of the switch tube, and the other end electrically connected to the voltage output end of the driving chip and the third resistor.
  • the first voltage signal is a high-level voltage signal
  • the second voltage signal is a low-level voltage signal
  • the switch tube is a P-type switch tube.
  • the switch tube is a transistor or a field effect tube.
  • the switch branch includes:
  • the input terminal is electrically connected to the signal output terminal of the comparator, and the output terminal is connected to the gate of the switch tube;
  • the gate is electrically connected to the output end of the inverter, the source is electrically connected to the feedback voltage input end of the driving chip and the first output end of the feedback circuit, and the drain is connected to the adjustment The second output of the branch is electrically connected.
  • the adjustment branch includes:
  • a second resistor one end is electrically connected to the feedback voltage input end of the driving chip, and the other end is grounded;
  • a third resistor one end is electrically connected to the voltage output end of the drive chip, and the other end is electrically connected to the second resistance, the feedback voltage output end of the drive chip, and the source of the switch tube;
  • the fourth resistor has one end electrically connected to the drain of the switch tube, and the other end electrically connected to the voltage output end of the driving chip and the third resistor.
  • the first voltage signal is a high-level voltage signal
  • the second voltage signal is a low-level voltage signal
  • the switch tube is an N-type switch tube
  • an embodiment of the present application further provides a display panel, the display panel includes:
  • the peripheral circuit area is electrically connected to the display area and is used to supply power and drive signals to the display area;
  • the peripheral circuit area includes a driving circuit
  • the driving circuit includes:
  • Driver chip used to output working voltage
  • a detection signal generating circuit for receiving a first voltage signal and a second voltage signal, and generating a detection control signal for ageing detection based on the first voltage signal and the second voltage signal;
  • a feedback circuit the first input terminal of the feedback circuit is electrically connected to the voltage output terminal of the driving chip, the second input terminal of the feedback circuit is electrically connected to the output terminal of the detection signal generation circuit, and the feedback circuit
  • the first output terminal is electrically connected to the feedback voltage input terminal of the driving chip, and is used to receive the detection control signal output by the detection signal generating circuit and the operating voltage provided by the driving chip, according to the detection control signal and all
  • the operating voltage generates a feedback voltage and outputs it to the driving chip, so that the driving chip adjusts the operating voltage to a voltage required for aging detection according to the feedback voltage.
  • the detection signal generating circuit includes:
  • a voltage input branch for receiving the first voltage signal and the second voltage signal
  • the judgment branch is electrically connected to the voltage input branch, the first voltage signal and the second voltage signal are input to the judgment branch through the voltage input branch, and the judgment branch is based on the first A voltage signal and the second voltage signal generate the detection control signal
  • the voltage input branch includes:
  • the first signal input terminal is electrically connected to the judgment branch
  • a second signal input terminal electrically connected to the judgment branch and the first signal input terminal
  • the first resistor has one end electrically connected to the first signal input terminal and the other end electrically connected to the second signal input terminal.
  • the judgment branch includes a comparator, a positive input terminal of the comparator is electrically connected to the first signal input terminal, and a negative input terminal of the comparator is connected to the first The resistor and the second signal input terminal are electrically connected, and the comparison signal output terminal of the comparator is electrically connected to the first input terminal of the feedback circuit.
  • the feedback circuit includes:
  • the adjustment branch is electrically connected to the voltage output end of the driving chip through the first input end of the feedback circuit, and the adjustment branch is connected to the drive through the first output end of the feedback circuit
  • the feedback voltage input terminal of the chip is electrically connected to generate a feedback voltage according to the detection control signal and the operating voltage and output to the driving chip, so that the driving chip adjusts the operating voltage according to the feedback voltage To the voltage required for aging testing;
  • a switch branch the first input end of the switch branch is electrically connected to the comparison signal output end of the comparator, and the second input end of the switch branch passes through the second output end of the adjustment branch
  • the adjustment branch is electrically connected, and the output end of the switch branch is electrically connected to the feedback voltage input end of the drive circuit and the first output end of the feedback circuit, for receiving the detection control signal, and according to the The detection control signal controls the feedback voltage output by the adjustment branch
  • the switch branch includes:
  • the gate is electrically connected to the signal output terminal of the comparator
  • the drain is electrically connected to the feedback voltage input terminal of the driving chip and the first output terminal of the feedback circuit
  • the source electrode is connected to the adjustment branch
  • the second output is electrically connected.
  • the adjustment branch includes:
  • a second resistor one end is electrically connected to the feedback voltage input end of the driving chip, and the other end is grounded;
  • a third resistor one end is electrically connected to the voltage output end of the drive chip, and the other end is electrically connected to the second resistance, the feedback voltage output end of the drive chip and the drain of the switch tube;
  • the fourth resistor has one end electrically connected to the source of the switch tube, and the other end electrically connected to the voltage output end of the driving chip and the third resistor.
  • the embodiments of the present application provide a driving circuit and a display panel.
  • the driving circuit includes a driving chip, a detection signal generating circuit and a feedback circuit.
  • the driving chip is used to output an operating voltage.
  • the detection signal generating circuit is configured to receive a first voltage signal and a second voltage signal, and generate a detection control signal for ageing detection according to the first voltage signal and the second voltage signal.
  • the first input terminal of the feedback circuit is electrically connected to the voltage output terminal of the driving chip, and the second input terminal of the feedback circuit is electrically connected to the output terminal of the detection signal generation circuit.
  • the first output terminal of the feedback circuit is electrically connected to the feedback voltage input terminal of the driving chip, and is configured to receive the detection control signal output by the detection signal generating circuit and the operating voltage provided by the driving chip, according to the detection control signal And the operating voltage generates a feedback voltage and outputs it to the driving chip, so that the driving chip adjusts the operating voltage to a voltage required for aging detection according to the feedback voltage.
  • the detection signal generation circuit may generate a detection control signal for aging detection, so that the feedback circuit outputs the drive chip according to the detection control signal
  • the voltage is adjusted to the voltage required for the aging test, which is convenient to increase the voltage according to the actual needs in the aging test to meet the needs of the aging test, and to meet the diversity requirements for the voltage required for the aging test voltage during the aging test.
  • FIG. 1 is a schematic diagram of the electrical structure of an exemplary display panel
  • FIG. 2 is a schematic diagram of a circuit structure of a driving circuit provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a circuit structure of another driving circuit provided by an embodiment of the present application.
  • TFT-LCD display panel is one of the main products of flat panel display, and has become an important display platform in modern information technology industry and video products. Please refer to Figure 1.
  • the main driving principles of the TFT-LCD display panel include: the system motherboard connects the data such as pixel signals and control signals, and the power supply to the connectors on the printed circuit board (Printed Circuit Board, PCB) through wires, and the data passes through After the timing controller (TCON) integrated circuit on the PCB board is processed, the PCB board, through the source film driver chip (Source-Chip on Film, S-COF) and the gate film driver chip (Gate-Chip on Film, G-COF) is connected to the display area, so that the display area can obtain the required power and data to achieve image display.
  • TCON timing controller
  • the display panel is prone to problems such as liquid crystal cell line defects and slight damage to electronic components. During user use, these problems are likely to cause display panel defects, such as wire breakage, corrosion, etc., which seriously affect the quality of the product.
  • an aging test is required to test whether these problems exist.
  • the conventional aging test design has been unable to meet customers' needs for the diversity of voltages used in the aging test process.
  • the embodiments of the present application provide a driving circuit.
  • the driving circuit includes a driving chip 100, a detection signal generating circuit 200 and a feedback circuit 300.
  • the driving chip 100 is used to output an operating voltage.
  • the detection signal generating circuit 200 is configured to receive a first voltage signal and a second voltage signal, and generate a detection control signal for performing aging detection according to the first voltage signal and the second voltage signal.
  • the first input terminal of the feedback circuit 300 is electrically connected to the voltage output terminal of the driving chip 100
  • the second input terminal of the feedback circuit 300 is electrically connected to the output terminal of the detection signal generation circuit 200
  • the feedback The first output terminal of the circuit 300 is electrically connected to the feedback voltage input terminal of the driving chip 100, and is used to receive the detection control signal output by the detection signal generating circuit 200 and the operating voltage provided by the driving chip 100, according to The detection control signal and the operating voltage generate a feedback voltage and output to the driving chip 100, so that the driving chip 100 adjusts the operating voltage to a voltage required for aging detection according to the feedback voltage.
  • the detection signal generation circuit 200 may generate a detection control signal for aging detection, so that the feedback circuit 300 drives the drive according to the detection control signal
  • the voltage output by the chip 100 is adjusted to the voltage required for aging detection, so that the voltage can be increased according to actual requirements during the aging detection to meet the needs of the aging detection.
  • the detection signal generation circuit 200 includes a voltage input branch 210 and a determination branch 220.
  • the voltage input branch 210 is used to receive the first voltage signal and the second voltage signal.
  • the judgment branch 220 is electrically connected to the voltage input branch 210, the first voltage signal and the second voltage signal are input to the judgment branch 220 through the voltage input branch 210, and the judgment branch The circuit 220 generates the detection control signal according to the first voltage signal and the second voltage signal.
  • the voltage input branch 210 includes a first signal input terminal 211, a second signal input terminal 212, and a first resistor 213.
  • the first signal input terminal 211 is electrically connected to the judgment branch 220.
  • the second signal input terminal 212 is electrically connected to the judgment branch 220 and the first signal input terminal.
  • One end of the first resistor is electrically connected to the first signal input terminal, and the other end is electrically connected to the second signal input terminal.
  • the first voltage signal is received through the first signal input terminal 211
  • the second input signal is received through the second signal input terminal 212. Therefore, when the aging detection is required, the first signal input terminal 211 and the second signal input terminal 212 are respectively input with the first voltage signal and the second voltage signal to perform the aging detection process, which is convenient for the aging detection of the display panel .
  • the judgment branch 220 includes a comparator 221, a positive input terminal of the comparator is electrically connected to the first signal input terminal 211, and a negative input terminal of the comparator is connected to the The first resistor 213 and the second signal input terminal 212 are electrically connected, and the comparison signal output terminal of the comparator is electrically connected to the first input terminal of the feedback circuit 300.
  • the positive input terminal of the comparator 221 is connected to the first signal input terminal 211, and the positive input terminal of the comparator 221 is connected to the second signal input terminal 212, Therefore, the comparator 221 receives the first voltage signal and the second voltage signal through the positive input terminal and the negative input terminal, respectively.
  • the comparator 221 compares the first voltage signal and the second voltage signal, and detects a high-level or low-level detection control signal at the signal output terminal of the comparator 221.
  • the feedback circuit 300 includes an adjustment branch 310 and a switching branch 320.
  • the adjustment branch 310 is electrically connected to the voltage output end of the driving chip 100 through the first input terminal of the feedback circuit 300, and the adjustment branch is passed through the first output of the feedback circuit 300 Terminal is electrically connected to the feedback voltage input terminal of the driving chip 100, and is used to generate a feedback voltage according to the detection control signal and the operating voltage and output to the driving chip 100, so that the driving chip 100 according to the The feedback voltage adjusts the working voltage to the voltage required for aging detection.
  • the first input terminal of the switch branch 320 is electrically connected to the comparison signal output terminal of the comparator, and the second input terminal of the switch branch is connected to the adjustment branch through the second output terminal of the feedback circuit 300 Electrical connection, the output end of the switch branch is electrically connected to the feedback voltage input end of the drive circuit and the first output end of the feedback circuit 300, for receiving the detection control signal, and according to the detection The control signal controls the feedback voltage output by the adjustment branch.
  • the switch branch 320 includes a switch tube 321.
  • the gate of the switch 321 is electrically connected to the signal output of the comparator 221, the drain of the switch 321 is connected to the feedback voltage input of the driving chip 100 and the first output of the feedback circuit 300
  • the terminal is electrically connected
  • the source is electrically connected to the second output end of the adjustment branch
  • the source of the switch tube 321 is connected to the adjustment branch 310.
  • the first output terminal of the adjustment branch is the first output terminal of the feedback circuit 300.
  • the adjustment branch 310 includes a second resistor 311, a third resistor 312, and a fourth resistor 313.
  • One end of the second resistor 311 is electrically connected to the feedback voltage input end of the driving chip 100, and the other end is grounded.
  • One end of the third resistor 312 is electrically connected to the voltage output end of the driving chip 100, and the other end is connected to the second resistor 311, the feedback voltage output end of the driving chip 100, and the drain of the switch tube 321 Electrical connection.
  • One end of the fourth resistor 313 is electrically connected to the source of the switch 321, and the other end is connected to the voltage output end of the driving chip 100 and the third resistor 312.
  • the first voltage signal is a high-level voltage signal
  • the second voltage signal is a low-level voltage signal
  • the switch 321 is a P-type switch 321.
  • the positive input terminal of the comparator 221 is a high-voltage Flat voltage signal
  • the negative input terminal of the comparator 221 is a low-level voltage signal
  • the detection control signal output by the comparator 221 through the signal output terminal is a low-level signal
  • the P-type switch 321 is turned on
  • the switch 321 is a transistor or a field effect transistor.
  • the switch tube 321 can also be replaced with a component having switching characteristics, such as a relay.
  • the switch 321 is a P-type field effect transistor. When the gate voltage is low, the switch 321 is turned on, and when the gate voltage is high, the switch 321 is turned off.
  • the detection control signal output by the comparator 221 is a high-level signal; when the voltage of the positive input terminal of the comparator 221 is high
  • the detection control signal output by the comparator 221 is a high-level signal.
  • the voltage output from the output end of the driving chip 100 is the working voltage actually provided to the display area.
  • the threshold value of the feedback voltage V FB of the driving chip 100 is 1.25V. When the feedback voltage received by the driving chip 100 is lower than 1.25V, the driving chip 100 automatically increases the output voltage according to the feedback voltage.
  • the second signal input terminal 212 is suspended, and the first voltage signal VDD is 3.5V. No current flows through the first resistor 213.
  • the first resistor 213 is equivalent to a wire, that is, the voltage of the positive input terminal and the negative input terminal of the comparator 221 is equal to 3.5V, and the detection control signal output by the comparator 221 is For a low-level signal, the gate of the switch 321 is also at a low level, and the switch 321 is turned on.
  • a second voltage signal is input through the second signal input terminal 212, the second voltage signal is a low-level signal, that is, the second signal input terminal 212 is grounded, and the comparator
  • the positive input terminal of 221 is 3.5V, so the detection control signal output by the comparator 221 is a high-level signal, the gate of the switch 321 is high, and the switch 321 is turned off.
  • the output voltage V2 of the driving chip 100 is equal to 1.25 * (R2 + R3) / R2. And, according to the formula, V2> V1.
  • the actual output voltage of the drive circuit can be increased by adjusting the resistance of each resistor in the feedback circuit 300 to meet the customer's requirement for increasing the operating voltage in the aging test process.
  • the switch tube 321 may also be an N-type switch tube, please refer to FIG. 3.
  • the switch branch 320 includes a switch 321 and an inverter 322.
  • the input end of the inverter 322 is electrically connected to the signal output end of the comparator, and the output end is connected to the gate of the switch tube.
  • the gate is electrically connected to the output end of the inverter, the source is electrically connected to the feedback voltage input end of the driving chip and the first output end of the feedback circuit, and the drain is connected The second output of the adjustment branch is electrically connected.
  • the adjustment branch 310 includes a second resistor 311, a third resistor 312, and a fourth resistor 313.
  • One end of the second resistor 311 is electrically connected to the feedback voltage input end of the driving chip 100, and the other end is grounded.
  • One end of the third resistor 312 is electrically connected to the voltage output end of the driving chip 100, and the other end is connected to the second resistor 311, the feedback voltage output end of the driving chip 100, and the drain of the switch tube 321 Electrical connection.
  • One end of the fourth resistor 313 is electrically connected to the source of the switch 321, and the other end is connected to the voltage output end of the driving chip 100 and the third resistor 312.
  • the first voltage signal is a high-level voltage signal
  • the second voltage signal is a low-level voltage signal
  • the switch tube is an N-type switch tube.
  • the present application also provides a display panel, the display panel further includes:
  • Display area used to display according to the driving signal
  • the peripheral circuit area is electrically connected to the display area and is used to supply power and drive signals to the display area;
  • the peripheral circuit area includes a driving circuit
  • the driving circuit includes a driving chip 100, a detection signal generating circuit 200, and a feedback circuit 300.
  • the driving chip 100 is used to output a working voltage
  • the detection signal generating circuit 200 is configured to receive a first voltage signal and a second voltage signal, and generate a detection control signal for aging detection according to the first voltage signal and the second voltage signal;
  • the first input terminal of the feedback circuit 300 is electrically connected to the voltage output terminal of the driving chip
  • the second input terminal of the feedback circuit is electrically connected to the output terminal of the detection signal generation circuit
  • the first An output terminal is electrically connected to the feedback voltage input terminal of the driving chip, for receiving the detection control signal output by the detection signal generating circuit and the operating voltage provided by the driving chip, according to the detection control signal and the operation
  • the voltage generates a feedback voltage and outputs it to the driving chip, so that the driving chip adjusts the operating voltage to a voltage required for aging detection according to the feedback voltage.
  • the detection signal generating circuit 200 includes a voltage input branch 210 and a determination branch 220.
  • the voltage input branch 210 is used to receive the first voltage signal and the second voltage signal.
  • the judgment branch 220 is electrically connected to the voltage input branch 210, and the first voltage signal and the second voltage signal are input to the judgment branch through the voltage input branch, and the judgment branch is based on The first voltage signal and the second voltage signal generate the detection control signal.
  • the voltage input branch 210 includes a first signal input terminal 211, a second signal input terminal 212, and a first resistor 213.
  • the first signal input terminal 211 is electrically connected to the judgment branch 220.
  • the second signal input terminal 212 is electrically connected to the judgment branch 220 and the first signal input terminal.
  • One end of the first resistor is electrically connected to the first signal input terminal, and the other end is electrically connected to the second signal input terminal.
  • the judgment branch 220 includes a comparator 221, a positive input terminal of the comparator is electrically connected to the first signal input terminal 211, and a negative input terminal of the comparator is connected to all The first resistor 213 and the second signal input terminal 212 are electrically connected, and the comparison signal output terminal of the comparator is electrically connected to the first input terminal of the feedback circuit 300.
  • the feedback circuit 300 includes an adjustment branch 310 and a switching branch 320.
  • the adjustment branch 310 is electrically connected to the voltage output end of the driving chip 100 through the first input terminal of the feedback circuit 300, and the adjustment branch is passed through the first output of the feedback circuit 300 Terminal is electrically connected to the feedback voltage input terminal of the driving chip 100, and is used to generate a feedback voltage according to the detection control signal and the operating voltage and output to the driving chip 100, so that the driving chip 100 according to the The feedback voltage adjusts the working voltage to the voltage required for aging detection.
  • the first input terminal of the switch branch 320 is electrically connected to the comparison signal output terminal of the comparator, and the second input terminal of the switch branch is connected to the adjustment branch through the second output terminal of the feedback circuit 300 Electrical connection, the output end of the switch branch is electrically connected to the feedback voltage input end of the drive circuit and the first output end of the feedback circuit 300, for receiving the detection control signal, and according to the detection The control signal controls the feedback voltage output by the adjustment branch.
  • the switch branch 320 includes a switch tube 321.
  • the gate of the switch 321 is electrically connected to the signal output of the comparator 221, the drain of the switch 321 is connected to the feedback voltage input of the driving chip 100 and the first output of the feedback circuit 300
  • the terminal is electrically connected
  • the source is electrically connected to the second output end of the adjustment branch
  • the source of the switch tube 321 is connected to the adjustment branch 310.
  • the first output terminal of the adjustment branch is the first output terminal of the feedback circuit 300.
  • the adjustment branch 310 includes a second resistor 311, a third resistor 312, and a fourth resistor 313.
  • One end of the second resistor 311 is electrically connected to the feedback voltage input end of the driving chip 100, and the other end is grounded.
  • One end of the third resistor 312 is electrically connected to the voltage output end of the driving chip 100, and the other end is connected to the second resistor 311, the feedback voltage output end of the driving chip 100, and the drain of the switch tube 321 Electrical connection.
  • One end of the fourth resistor 313 is electrically connected to the source of the switch 321, and the other end is connected to the voltage output end of the driving chip 100 and the third resistor 312.
  • the embodiments of the present application provide a driving circuit and a display panel.
  • the driving circuit includes a driving chip 100, a detection signal generating circuit 200, and a feedback circuit 300.
  • the detection signal generating circuit 200 is configured to receive a first voltage signal and a second voltage signal, and generate a detection control signal for performing aging detection according to the first voltage signal and the second voltage signal.
  • the feedback circuit 300 is configured to receive the detection control signal output by the detection signal generation circuit 200, and adjust the voltage output by the driving chip 100 to the voltage required for aging detection according to the detection control signal.
  • the detection signal generation circuit 200 may generate a detection control signal for performing burn-in detection, so that the feedback circuit 300 drives the drive according to the detection control signal
  • the voltage output by the chip 100 is adjusted to the voltage required for the aging test, which is convenient for increasing the voltage according to the actual needs during the aging test to meet the needs of the aging test, and meeting the diversity requirements of the voltage required for the aging test voltage during the aging test .

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Nonlinear Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optics & Photonics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

一种驱动电路和显示面板。驱动电路包括驱动芯片（100）、检测信号生成电路（200）和反馈电路（300）。检测信号生成电路（200）用于根据接收到的第一电压信号和第二电压信号生成用于进行老化检测的检测控制信号。反馈电路（300）用于根据检测控制信号以及工作电压生成反馈电压并输出给所述驱动芯片（100），以使驱动芯片（100）根据反馈电压将输出的工作电压调整至进行老化检测所需的电压，满足老化检测过程中对进行老化检测电压所需的电压的多样性要求。

Description

驱动电路和显示面板
相关申请
本申请要求2018年11月21日申请的，申请号为201811392320.0，名称为“驱动电路和显示面板”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及显示领域，尤其涉及一种驱动电路和显示面板。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术。
薄膜晶体管液晶显示(Thin Film Transistor Liquid Crystal Display，TFT-LCD)面板是当前平板显示的主要产品之一，已经成为了现代信息科技产业和视讯产品中重要的显示平台。TFT-LCD显示面板工作过程中，主要通过印刷电路板上的驱动芯片提供电源和信号给显示区域，从而实现图像显示。
在生产过程中，在完成显示面板制作后一般还要进行老化检测。所述老化检测主要是用于检测是否存在液晶盒线缺陷、电子元件轻微损伤等问题，在用户使用过程中这些问题容易导致显示面板出现瑕疵，如断线、腐蚀等，严重影响产品的质量。但是，常规的老化检测设计无法满足客户对在老化检测过程中所使用的电压的多样性的需求。
发明内容
基于此，本申请提供了一种驱动电路和显示面板以解决无法满足客户对进行老化检测所需电压的多样性要求的情况。
本申请实施例提供了一种驱动电路，包括：
驱动芯片，用于输出工作电压；
检测信号生成电路，用于接收第一电压信号和第二电压信号，并根据所述第一电压信号和所述第二电压信号生成用于进行老化检测的检测控制信 号；以及
反馈电路，所述反馈电路的第一输入端与所述驱动芯片的电压输出端电连接，所述反馈电路的第二输入端与所述检测信号生成电路的输出端电连接，所述反馈电路的第一输出端与所述驱动芯片的反馈电压输入端电连接，用于接收所述检测信号生成电路输出的检测控制信号以及所述驱动芯片提供的工作电压，根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片，以使所述驱动芯片根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压。
在一个实施例中，所述检测信号生成电路包括：
电压输入支路，用于接收所述第一电压信号和所述第二电压信号；以及
判断支路，与所述电压输入支路电连接，所述第一电压信号和所述第二电压信号通过所述电压输入支路输入所述判断支路，所述判断支路根据所述第一电压信号和所述第二电压信号生成所述检测控制信号。
在一个实施例中，所述电压输入支路包括：
第一信号输入端，与所述判断支路电连接；
第二信号输入端，与所述判断支路以及所述第一信号输入端分别电连接；以及
第一电阻，一端与所述第一信号输入端电连接，另一端与所述第二信号输入端电连接。
在一个实施例中，所述判断支路包括比较器，所述比较器的正向输入端与所述第一信号输入端电连接，所述比较器的负向输入端与所述第一电阻以及所述第二信号输入端电连接，所述比较器的比较信号输出端与所述反馈电路的第一输入端电连接。
在一个实施例中，所述反馈电路包括：
调整支路，所述调整支路通过所述反馈电路的第一输入端与所述驱动芯片的电压输出端电连接，所述调整支路通过所述反馈电路的第一输出端与所述驱动芯片的反馈电压输入端电连接，用于根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片，以使所述驱动芯片根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压；以及
开关支路，所述开关支路的第一输入端与所述比较器的比较信号输出端电连接，所述开关支路的第二输入端通过所述调整支路的第二输出端与所述 调整支路电连接，所述开关支路的输出端与所述驱动电路的反馈电压输入端以及所述反馈电路的第一输出端电连接，用于接收所述检测控制信号，并根据所述检测控制信号控制所述调整支路输出的反馈电压。
在一个实施例中，所述开关支路包括开关管，栅极与所述比较器的信号输出端连接，漏极与所述驱动芯片的反馈电压输入端以及所述反馈电路的第一输出端电连接，源极与所述调整支路的第二输出端电连接。
在一个实施例中，所述调整支路包括：
第二电阻，一端与所述驱动芯片的反馈电压输入端电连接，另一端接地；
第三电阻，一端与所述驱动芯片的电压输出端电连接，另一端与所述第二电阻、所述驱动芯片的反馈电压输出端以及所述开关管的漏极电连接；以及
第四电阻，一端与所述开关管的源极电连接，另一端与所述驱动芯片的电压输出端和所述第三电阻电连接。
在一个实施例中，所述第一电压信号为高电平电压信号，所述第二电压信号为低电平电压信号。
在一个实施例中，所述开关管为P型开关管。
在一个实施例中，所述开关管为三极管或场效应管。
在一个实施例中，所述开关支路包括：
反相器，输入端与所述比较器的信号输出端电连接，输出端与开关管的栅极连接；以及
所述开关管，栅极与所述反相器的输出端电连接，源极与所述驱动芯片的反馈电压输入端以及所述反馈电路的第一输出端电连接，漏极通所述调整支路的第二输出端电连接。
在一个实施例中，所述调整支路包括：
第二电阻，一端与所述驱动芯片的反馈电压输入端电连接，另一端接地；
第三电阻，一端与所述驱动芯片的电压输出端电连接，另一端与所述第二电阻、所述驱动芯片的反馈电压输出端以及所述开关管的源极电连接；以及
第四电阻，一端与所述开关管的漏极电连接，另一端与所述驱动芯片的电压输出端和所述第三电阻电连接。
在一个实施例中，所述第一电压信号为高电平电压信号，所述第二电压 信号为低电平电压信号，所述开关管为N型开关管
基于同一发明构思，本申请实施例还提供了一种显示面板，所述显示面板包括：
显示区域，用于根据驱动信号进行显示，以及
周边电路区域，与所述显示区域电连接，用于为所述显示区域供电以及提供驱动信号；
其中，所述周边电路区域包括驱动电路，所述驱动电路包括：
驱动芯片，用于输出工作电压；
检测信号生成电路，用于接收第一电压信号和第二电压信号，并根据所述第一电压信号和所述第二电压信号生成用于进行老化检测的检测控制信号；以及
反馈电路，所述反馈电路的第一输入端与所述驱动芯片的电压输出端电连接，所述反馈电路的第二输入端与所述检测信号生成电路的输出端电连接，所述反馈电路的第一输出端与所述驱动芯片的反馈电压输入端电连接，用于接收所述检测信号生成电路输出的检测控制信号以及所述驱动芯片提供的工作电压，根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片，以使所述驱动芯片根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压。
在其中一个实施例中，所述检测信号生成电路包括：
电压输入支路，用于接收所述第一电压信号和所述第二电压信号；以及
判断支路，与所述电压输入支路电连接，所述第一电压信号和所述第二电压信号通过所述电压输入支路输入所述判断支路，所述判断支路根据所述第一电压信号和所述第二电压信号生成所述检测控制信号
在其中一个实施例中，所述电压输入支路包括：
第一信号输入端，与所述判断支路电连接；
第二信号输入端，与所述判断支路以及所述第一信号输入端电连接；以及
第一电阻，一端与所述第一信号输入端电连接，另一端与所述第二信号输入端电连接。
在其中一个实施例中，所述判断支路包括比较器，所述比较器的正向输入端与所述第一信号输入端电连接，所述比较器的负向输入端与所述第一电 阻以及所述第二信号输入端电连接，所述比较器的比较信号输出端与所述反馈电路的第一输入端电连接。
在其中一个实施例中，所述反馈电路包括：
调整支路，所述调整支路通过所述反馈电路的第一输入端与所述驱动芯片的电压输出端电连接，所述调整支路通过所述反馈电路的第一输出端与所述驱动芯片的反馈电压输入端电连接，用于根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片，以使所述驱动芯片根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压；以及
开关支路，所述开关支路的第一输入端与所述比较器的比较信号输出端电连接，所述开关支路的第二输入端通过所述调整支路的第二输出端与所述调整支路电连接，所述开关支路的输出端与所述驱动电路的反馈电压输入端以及所述反馈电路的第一输出端电连接，用于接收所述检测控制信号，并根据所述检测控制信号控制所述调整支路输出的反馈电压
在其中一个实施例中，所述开关支路包括：
开关管，栅极与所述比较器的信号输出端电连接，漏极与所述驱动芯片的反馈电压输入端以及所述反馈电路的第一输出端电连接，源极通所述调整支路的第二输出端电连接。
在其中一个实施例中，所述调整支路包括：
第二电阻，一端与所述驱动芯片的反馈电压输入端电连接，另一端接地；
第三电阻，一端与所述驱动芯片的电压输出端电连接，另一端与所述第二电阻、所述驱动芯片的反馈电压输出端以及所述开关管的漏极电连接；以及
第四电阻，一端与所述开关管的源极电连接，另一端与所述驱动芯片的电压输出端和所述第三电阻电连接。
综上，本申请实施例提供了一种驱动电路和显示面板。所述驱动电路包括驱动芯片、检测信号生成电路和反馈电路。所述驱动芯片用于输出工作电压。所述检测信号生成电路用于接收第一电压信号和第二电压信号，并根据所述第一电压信号和所述第二电压信号生成用于进行老化检测的检测控制信号。所述反馈电路，所述反馈电路的第一输入端与所述驱动芯片的电压输出端电连接，所述反馈电路的第二输入端与所述检测信号生成电路的输出端电连接，所述反馈电路的第一输出端与所述驱动芯片的反馈电压输入端电连接， 用于接收所述检测信号生成电路输出的检测控制信号以及所述驱动芯片提供的工作电压，根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片，以使所述驱动芯片根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压。本申请提供的可进行老化检测的驱动电路中，可通过所述检测信号生成电路生成用于进行老化检测的检测控制信号，以使所述反馈电路根据所述检测控制信号将所述驱动芯片输出的电压调整至进行老化检测所需的电压，便于在老化检测中按照实际需要升高电压以满足老化检测需要，满足老化检测过程中对进行老化检测电压所需的电压的多样性要求。
附图说明
图1为示例性的显示面板的电气结构示意图；
图2为本申请实施例提供的一种驱动电路的电路结构示意图；
图3为本申请实施例提供的另一种驱动电路的电路结构示意图。
具体实施方式
为使本申请的上述目的、特征和优点能够更加明显易懂，下面结合附图对本申请的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本申请。但是本申请能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本申请内涵的情况下做类似改进，因此本申请不受下面公开的具体实施的限制。
TFT-LCD显示面板是当前平板显示的主要产品之一，已经成为了现代信息科技产业和视讯产品中重要的显示平台。请参见图1，TFT-LCD显示面板的主要驱动原理包括：系统主板将像素信号和控制信号等数据以及电源通过线材与印刷电路板(Printed Circuit Board,PCB)上的连接器相连接，数据经过PCB板上的时序控制器(Timing Controller,TCON)集成电路处理后，经PCB板、通过源级薄膜驱动芯片(Source-Chip on Film,S-COF)和栅极薄膜驱动芯片(Gate-Chip on Film，G-COF)与显示区连接，从而使显示区获得所需的电源和数据，以实现图像显示。
但在生产过程中，显示面板容易出现液晶盒线缺陷、电子元件轻微损伤等问题，在用户使用过程中这些问题容易导致显示面板出现瑕疵，如断线、 腐蚀等，严重影响产品的质量，因此在显示面板的制作工艺完成后需要进行老化检测以测试是否存在这些问题。但是，常规的老化检测设计已无法满足客户对在老化检测过程中所使用的电压的多样性的需求。
针对上述问题，本申请实施例提供了一种驱动电路。请参见图2，所述驱动电路包括驱动芯片100、检测信号生成电路200和反馈电路300。
可以理解，所述驱动芯片100用于输出工作电压。所述检测信号生成电路200用于接收第一电压信号和第二电压信号，并根据所述第一电压信号和所述第二电压信号生成用于进行老化检测的检测控制信号。所述反馈电路300的第一输入端与所述驱动芯片100的电压输出端电连接，所述反馈电路300的第二输入端与所述检测信号生成电路200的输出端电连接，所述反馈电路300的第一输出端与所述驱动芯片100的反馈电压输入端电连接，用于接收所述检测信号生成电路200输出的检测控制信号以及所述驱动芯片100提供的工作电压，根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片100，以使所述驱动芯片100根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压。
可以理解，在本实施例提供的驱动电路中，可通过所述检测信号生成电路200生成用于进行老化检测的检测控制信号，以使所述反馈电路300根据所述检测控制信号将所述驱动芯片100输出的电压调整至进行老化检测所需的电压，便于在老化检测中按照实际要求升高电压以满足老化检测需要。
在一个实施例中，所述检测信号生成电路200包括电压输入支路210和判断支路220。所述电压输入支路210用于接收所述第一电压信号和所述第二电压信号。所述判断支路220与所述电压输入支路210电连接，所述第一电压信号和所述第二电压信号通过所述电压输入支路210输入所述判断支路220，所述判断支路220根据所述第一电压信号和所述第二电压信号生成所述检测控制信号。
在一个实施例中，所述电压输入支路210包括第一信号输入端211、第二信号输入端212和第一电阻213。所述第一信号输入端211与所述判断支路220电连接。所述第二信号输入端212与所述判断支路220以及所述第一信号输入端电连接。所述第一电阻的一端与所述第一信号输入端电连接，另一端与所述第二信号输入端电连接。
可理解，本实施例中通过与所述第一信号输入端211接收所述第一电压 信号，通过所述第二信号输入端212接收所述第二输入信号。使得在需要进行老化检测时，通过所述第一信号输入端211和第二信号输入端212分别输入第一电压信号和第二电压信号，即可进行老化检测工艺，便于对显示面板进行老化检测。
在一个实施例中，所述判断支路220包括比较器221，所述比较器的正向输入端与所述第一信号输入端211电连接，所述比较器的负向输入端与所述第一电阻213以及所述第二信号输入端212电连接，所述比较器的比较信号输出端与所述反馈电路300的第一输入端电连接。
可以理解，本实施中所述比较器221的正向输入端与所述第一信号输入端211连接，比较器221的正向输入端负向输入端与所述第二信号输入端212连接，因此所述比较器221通过所述正向输入端和所述负向输入端分别接受所述第一电压信号和第二电压信号。通过所述比较器221对所述第一电压信号和所述第二电压信号进行比较，在所述比较器221的信号输出端高电平或低电平的检测控制信号。
在一个实施例中，所述反馈电路300包括调整支路310和开关支路320。所述调整支路310所述调整支路通过所述反馈电路300的第一输入端与所述驱动芯片100的电压输出端电连接，所述调整支路通过所述反馈电路300的第一输出端与所述驱动芯片100的反馈电压输入端电连接，用于根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片100，以使所述驱动芯片100根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压。所述开关支路320的第一输入端与所述比较器的比较信号输出端电连接，所述开关支路的第二输入端通过所述反馈电路300的第二输出端与所述调整支路电连接，所述开关支路的输出端与所述驱动电路的反馈电压输入端以及所述反馈电路300的第一输出端电连接，用于接收所述检测控制信号，并根据所述检测控制信号控制所述调整支路输出的反馈电压。
在一个实施例中，所述开关支路320包括开关管321。所述开关管321的栅极与所述比较器221的信号输出端电连接，所述开关管321的漏极与所述驱动芯片100的反馈电压输入端以及所述反馈电路300的第一输出端电连接，源极与所述调整支路的第二输出端电连接，所述开关管321的源极与所述调整支路310连接。需注意的是，本实施例中所述调整支路的第一输出端即为所述反馈电路300的第一输出端。
在一个实施例中，所述调整支路310包括第二电阻311、第三电阻312和第四电阻313。所述第二电阻311的一端与所述驱动芯片100的反馈电压输入端电连接，另一端接地。所述第三电阻312的一端与所述驱动芯片100的电压输出端电连接，另一端与所述第二电阻311、所述驱动芯片100的反馈电压输出端以及所述开关管321的漏极电连接。所述第四电阻313的一端与所述开关管321的源极电连接，另一端与所述驱动芯片100的电压输出端和所述第三电阻312连接。
在一个实施例中，所述第一电压信号为高电平电压信号，所述第二电压信号为低电平电压信号，所述开关管321为P型开关管321。
可以理解，在进行老化测试时，当所述第一电压信号为高电平电压信号，所述第二电压信号为低电压电平信号时，所述比较器221的正向输入端为高电平电压信号，所述比较器221的负向输入端为低电平电压信号，因此所述比较器221通过信号输出端输出的检测控制信号为低电平信号，P型开关管321导通，将驱动芯片100输出的电压调整至进行老化检测所需的电压。
在一个实施例中，所述开关管321为三极管或场效应管。此外，所述开关管321还可以用具有开关特性的元器件代替，如继电器。
本实施例中，开关管321为P型场效应管，当其栅极电压为低电平时，所述开关管321开启，当其栅极电压为高电平时，所述开关管321断开。当所述比较器221的正向输入端的电压高于负向输入端的电压时，所述比较器221输出的检测控制信号为高电平信号；当所述比较器221的正向输入端的电压高于负向输入端的电压时，所述比较器221输出的检测控制信号为高电平信号。驱动芯片100输出端输出的电压为实际提供给显示区域的工作电压。所述驱动芯片100的反馈电压V FB的阈值为1.25V，当所述驱动芯片100接收到的反馈电压低于1.25V时，所述驱动芯片100则根据所述反馈电压自动升高输出电压。
当驱动电路正常工作时，所述第二信号输入端212悬空，第一电压信号VDD为3.5V。第一电阻213中没有电流通过，第一电阻213等同于导线，即所述比较器221的正向输入端与负向输入端电压相等，均为3.5V，比较器221输出的检测控制信号为低电平信号，所述开关管321的栅极也为低电平，所述开关管321导通。此时，所述驱动芯片100的输出电压V1等于1.25*(Ra+R2)/R2，其中Ra＝R3*R4/(R3+R4)，其中，所述第一电阻213的阻值为R1，所述 第二电阻311的阻值为R2，所述第三电阻312的阻值为R3，所述第四电阻313的阻值为R4。
当需要进行老化检测时，通过所述第二信号输入端212输入第二电压信号，所述第二电压信号为低电平信号，即将所述第二信号输入端212接地，而所述比较器221的正向输入端为3.5V，因此所述比较器221输出的检测控制信号为高电平信号，所述开关管321的栅极为高电平，所述开关管321断开。此时，所述驱动芯片100的输出电压V2等于1.25*(R2+R3)/R2。并且，根据公式推算，V2＞V1。
可见，本实施例中可以通过调节所述反馈电路300中的各个电阻的阻值，升高驱动电路的实际输出电压，以满足客户在老化测试工艺中对升高工作电压的要求。
在其中一些实施例中，所述开关管321还可以为N型开关管，请参见图3。本实施例中，所述开关支路320包括开关管321和反相器322。
所述反相器322，其输入端与所述比较器的信号输出端电连接，输出端与开关管的栅极连接。
所述开关管321，其栅极与所述反相器的输出端电连接，源极与所述驱动芯片的反馈电压输入端以及所述反馈电路的第一输出端电连接，漏极通所述调整支路的第二输出端电连接。
所述调整支路310包括第二电阻311、第三电阻312和第四电阻313。所述第二电阻311的一端与所述驱动芯片100的反馈电压输入端电连接，另一端接地。所述第三电阻312的一端与所述驱动芯片100的电压输出端电连接，另一端与所述第二电阻311、所述驱动芯片100的反馈电压输出端以及所述开关管321的漏极电连接。所述第四电阻313的一端与所述开关管321的源极电连接，另一端与所述驱动芯片100的电压输出端和所述第三电阻312连接。可以理解，本实施例中所述第一电压信号为高电平电压信号，所述第二电压信号为低电平电压信号，所述开关管为N型开关管。
基于同一发明构思，本申请还提供了一种显示面板，所述显示面板还包括：
显示区域，用于根据驱动信号进行显示；
周边电路区域，与所述显示区域电连接，用于为所述显示区域供电以及提供驱动信号；
其中，所述周边电路区域包括驱动电路，所述驱动电路包括驱动芯片100、检测信号生成电路200和反馈电路300。
所述驱动芯片100用于输出工作电压；
所述检测信号生成电路200用于接收第一电压信号和第二电压信号，并根据所述第一电压信号和所述第二电压信号生成用于进行老化检测的检测控制信号；以及
所述反馈电路300的第一输入端与所述驱动芯片的电压输出端电连接，所述反馈电路的第二输入端与所述检测信号生成电路的输出端电连接，所述反馈电路的第一输出端与所述驱动芯片的反馈电压输入端电连接，用于接收所述检测信号生成电路输出的检测控制信号以及所述驱动芯片提供的工作电压，根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片，以使所述驱动芯片根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压。
在其中一个实施例中，所述检测信号生成电路200包括电压输入支路210和判断支路220。
所述电压输入支路210用于接收所述第一电压信号和所述第二电压信号。
所述判断支路220与所述电压输入支路210电连接，所述第一电压信号和所述第二电压信号通过所述电压输入支路输入所述判断支路，所述判断支路根据所述第一电压信号和所述第二电压信号生成所述检测控制信号。
在其中一个实施例中，所述电压输入支路210包括第一信号输入端211、第二信号输入端212和第一电阻213。所述第一信号输入端211与所述判断支路220电连接。所述第二信号输入端212与所述判断支路220以及所述第一信号输入端电连接。所述第一电阻的一端与所述第一信号输入端电连接，另一端与所述第二信号输入端电连接。
在其中一个实施例中，所述判断支路220包括比较器221，所述比较器的正向输入端与所述第一信号输入端211电连接，所述比较器的负向输入端与所述第一电阻213以及所述第二信号输入端212电连接，所述比较器的比较信号输出端与所述反馈电路300的第一输入端电连接。
在其中一个实施例中，所述反馈电路300包括调整支路310和开关支路320。所述调整支路310所述调整支路通过所述反馈电路300的第一输入端与所述驱动芯片100的电压输出端电连接，所述调整支路通过所述反馈电路300 的第一输出端与所述驱动芯片100的反馈电压输入端电连接，用于根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片100，以使所述驱动芯片100根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压。所述开关支路320的第一输入端与所述比较器的比较信号输出端电连接，所述开关支路的第二输入端通过所述反馈电路300的第二输出端与所述调整支路电连接，所述开关支路的输出端与所述驱动电路的反馈电压输入端以及所述反馈电路300的第一输出端电连接，用于接收所述检测控制信号，并根据所述检测控制信号控制所述调整支路输出的反馈电压。
在其中一个实施例中，所述开关支路320包括开关管321。所述开关管321的栅极与所述比较器221的信号输出端电连接，所述开关管321的漏极与所述驱动芯片100的反馈电压输入端以及所述反馈电路300的第一输出端电连接，源极与所述调整支路的第二输出端电连接，所述开关管321的源极与所述调整支路310连接。需注意的是，本实施例中所述调整支路的第一输出端即为所述反馈电路300的第一输出端。
在其中一个实施例中，所述调整支路310包括第二电阻311、第三电阻312和第四电阻313。所述第二电阻311的一端与所述驱动芯片100的反馈电压输入端电连接，另一端接地。所述第三电阻312的一端与所述驱动芯片100的电压输出端电连接，另一端与所述第二电阻311、所述驱动芯片100的反馈电压输出端以及所述开关管321的漏极电连接。所述第四电阻313的一端与所述开关管321的源极电连接，另一端与所述驱动芯片100的电压输出端和所述第三电阻312连接。
综上，本申请实施例提供了一种驱动电路和显示面板。所述驱动电路包括驱动芯片100、检测信号生成电路200和反馈电路300。所述检测信号生成电路200用于接收第一电压信号和第二电压信号，并根据所述第一电压信号和所述第二电压信号生成用于进行老化检测的检测控制信号。所述反馈电路300用于接收所述检测信号生成电路200输出的检测控制信号，并根据所述检测控制信号将所述驱动芯片100输出的电压调整至进行老化检测所需的电压。本申请提供的可进行老化检测的驱动电路中，可通过所述检测信号生成电路200生成用于进行老化检测的检测控制信号，以使所述反馈电路300根据所述检测控制信号将所述驱动芯片100输出的电压调整至进行老化检测所需的电压，便于在老化检测中按照实际需要升高电压以满足老化检测需要，满足老 化检测过程中对进行老化检测电压所需的电压的多样性要求。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种驱动电路，包括：
    驱动芯片，用于输出工作电压；
    检测信号生成电路，用于接收第一电压信号和第二电压信号，并根据所述第一电压信号和所述第二电压信号生成用于进行老化检测的检测控制信号；以及
    反馈电路，所述反馈电路的第一输入端与所述驱动芯片的电压输出端电连接，所述反馈电路的第二输入端与所述检测信号生成电路的输出端电连接，所述反馈电路的第一输出端与所述驱动芯片的反馈电压输入端电连接，用于接收所述检测信号生成电路输出的检测控制信号以及所述驱动芯片提供的工作电压，根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片，以使所述驱动芯片根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压。
  2. 如权利要求1所述的驱动电路，其中所述检测信号生成电路包括：
    电压输入支路，用于接收所述第一电压信号和所述第二电压信号；以及
    判断支路，与所述电压输入支路电连接，所述第一电压信号和所述第二电压信号通过所述电压输入支路输入所述判断支路，所述判断支路根据所述第一电压信号和所述第二电压信号生成所述检测控制信号。
  3. 如权利要求2所述的驱动电路，其中所述电压输入支路包括：
    第一信号输入端，与所述判断支路电连接；
    第二信号输入端，与所述判断支路以及所述第一信号输入端电连接；以及
    第一电阻，一端与所述第一信号输入端电连接，另一端与所述第二信号输入端电连接。
  4. 如权利要求3所述的驱动电路，其中所述判断支路包括比较器，所述比较器的正向输入端与所述第一信号输入端电连接，所述比较器的负向输入端与所述第一电阻以及所述第二信号输入端电连接，所述比较器的比较信号输出端与所述反馈电路的第一输入端电连接。
  5. 如权利要求4所述的驱动电路，其中所述反馈电路包括：
    调整支路，所述调整支路通过所述反馈电路的第一输入端与所述驱动芯 片的电压输出端电连接，所述调整支路通过所述反馈电路的第一输出端与所述驱动芯片的反馈电压输入端电连接，用于根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片，以使所述驱动芯片根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压；以及
    开关支路，所述开关支路的第一输入端与所述比较器的比较信号输出端电连接，所述开关支路的第二输入端通过所述调整支路的第二输出端与所述调整支路电连接，所述开关支路的输出端与所述驱动电路的反馈电压输入端以及所述反馈电路的第一输出端电连接，用于接收所述检测控制信号，并根据所述检测控制信号控制所述调整支路输出的反馈电压。
  6. 如权利要求5所述的驱动电路，其中所述开关支路包括开关管，栅极与所述比较器的信号输出端电连接，漏极与所述驱动芯片的反馈电压输入端以及所述反馈电路的第一输出端电连接，源极通所述调整支路的第二输出端电连接。
  7. 如权利要求6所述的驱动电路，其中所述调整支路包括：
    第二电阻，一端与所述驱动芯片的反馈电压输入端电连接，另一端接地；
    第三电阻，一端与所述驱动芯片的电压输出端电连接，另一端与所述第二电阻、所述驱动芯片的反馈电压输出端以及所述开关管的漏极电连接；以及
    第四电阻，一端与所述开关管的源极电连接，另一端与所述驱动芯片的电压输出端和所述第三电阻电连接。
  8. 如权利要求6所述的驱动电路，其中所述第一电压信号为高电平电压信号，所述第二电压信号为低电平电压信号。
  9. 如权利要求8所述的驱动电路，其中所述开关管为P型开关管。
  10. 如权利要求6所述的驱动电路，其中所述开关管为三极管或场效应管。
  11. 如权利要求5所述的驱动电路，其中所述开关支路包括：
    反相器，输入端与所述比较器的信号输出端电连接，输出端与开关管的栅极连接；以及
    所述开关管，栅极与所述反相器的输出端电连接，源极与所述驱动芯片的反馈电压输入端以及所述反馈电路的第一输出端电连接，漏极通所述调整支路的第二输出端电连接。
  12. 如权利要求11所述的驱动电路，其中所述调整支路包括：
    第二电阻，一端与所述驱动芯片的反馈电压输入端电连接，另一端接地；
    第三电阻，一端与所述驱动芯片的电压输出端电连接，另一端与所述第二电阻、所述驱动芯片的反馈电压输出端以及所述开关管的源极电连接；以及
    第四电阻，一端与所述开关管的漏极电连接，另一端与所述驱动芯片的电压输出端和所述第三电阻电连接。
  13. 如权利要求12所述的驱动电路，其中所述第一电压信号为高电平电压信号，所述第二电压信号为低电平电压信号，所述开关管为N型开关管。
  14. 一种显示面板，包括：
    显示区域，用于根据驱动信号进行显示，以及
    周边电路区域，与所述显示区域电连接，用于为所述显示区域供电以及提供驱动信号；
    其中，所述周边电路区域包括驱动电路，所述驱动电路包括：
    驱动芯片，用于输出工作电压；
    检测信号生成电路，用于接收第一电压信号和第二电压信号，并根据所述第一电压信号和所述第二电压信号生成用于进行老化检测的检测控制信号；以及
    反馈电路，所述反馈电路的第一输入端与所述驱动芯片的电压输出端电连接，所述反馈电路的第二输入端与所述检测信号生成电路的输出端电连接，所述反馈电路的第一输出端与所述驱动芯片的反馈电压输入端电连接，用于接收所述检测信号生成电路输出的检测控制信号以及所述驱动芯片提供的工作电压，根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片，以使所述驱动芯片根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压。
  15. 如权利要求14所述的显示面板，其中所述检测信号生成电路包括：
    电压输入支路，用于接收所述第一电压信号和所述第二电压信号；以及
    判断支路，与所述电压输入支路电连接，所述第一电压信号和所述第二电压信号通过所述电压输入支路输入所述判断支路，所述判断支路根据所述第一电压信号和所述第二电压信号生成所述检测控制信号。
  16. 如权利要求15所述的显示面板，其中所述电压输入支路包括：
    第一信号输入端，与所述判断支路电连接；
    第二信号输入端，与所述判断支路以及所述第一信号输入端电连接；以及
    第一电阻，一端与所述第一信号输入端电连接，另一端与所述第二信号输入端电连接。
  17. 如权利要求16所述的显示面板，其中所述判断支路包括比较器，所述比较器的正向输入端与所述第一信号输入端电连接，所述比较器的负向输入端与所述第一电阻以及所述第二信号输入端电连接，所述比较器的比较信号输出端与所述反馈电路的第一输入端电连接。
  18. 如权利要求17所述的显示面板，其中所述反馈电路包括：
    调整支路，所述调整支路通过所述反馈电路的第一输入端与所述驱动芯片的电压输出端电连接，所述调整支路通过所述反馈电路的第一输出端与所述驱动芯片的反馈电压输入端电连接，用于根据所述检测控制信号以及所述工作电压生成反馈电压并输出给所述驱动芯片，以使所述驱动芯片根据所述反馈电压将所述工作电压调整至进行老化检测所需的电压；以及
    开关支路，所述开关支路的第一输入端与所述比较器的比较信号输出端电连接，所述开关支路的第二输入端通过所述调整支路的第二输出端与所述调整支路电连接，所述开关支路的输出端与所述驱动电路的反馈电压输入端以及所述反馈电路的第一输出端电连接，用于接收所述检测控制信号，并根据所述检测控制信号控制所述调整支路输出的反馈电压。
  19. 如权利要求18所述的显示面板，其中所述开关支路包括：
    开关管，栅极与所述比较器的信号输出端电连接，漏极与所述驱动芯片的反馈电压输入端以及所述反馈电路的第一输出端电连接，源极通所述调整支路的第二输出端电连接。
  20. 如权利要求19所述的显示面板，其中所述调整支路包括：
    第二电阻，一端与所述驱动芯片的反馈电压输入端电连接，另一端接地；
    第三电阻，一端与所述驱动芯片的电压输出端电连接，另一端与所述第二电阻、所述驱动芯片的反馈电压输出端以及所述开关管的漏极电连接；以及
    第四电阻，一端与所述开关管的源极电连接，另一端与所述驱动芯片的电压输出端和所述第三电阻电连接。
PCT/CN2018/119272 2018-11-21 2018-12-05 驱动电路和显示面板 Ceased WO2020103193A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/270,203 US11663943B2 (en) 2018-11-21 2018-12-05 Drive circuit and display panel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811392320.0A CN109637404B (zh) 2018-11-21 2018-11-21 驱动电路和显示面板
CN201811392320.0 2018-11-21

Publications (1)

Publication Number Publication Date
WO2020103193A1 true WO2020103193A1 (zh) 2020-05-28

Family

ID=66068514

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/119272 Ceased WO2020103193A1 (zh) 2018-11-21 2018-12-05 驱动电路和显示面板

Country Status (3)

Country Link
US (1) US11663943B2 (zh)
CN (1) CN109637404B (zh)
WO (1) WO2020103193A1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110910809A (zh) * 2019-11-25 2020-03-24 Tcl华星光电技术有限公司 一种驱动电路及显示装置
CN111028806B (zh) * 2019-12-23 2021-01-26 成都中电熊猫显示科技有限公司 栅极驱动电路、液晶面板、显示装置和老化方法
CN111243475B (zh) * 2020-03-31 2022-11-18 昆山龙腾光电股份有限公司 显示面板测试治具电源系统
CN113160730A (zh) 2021-04-07 2021-07-23 Tcl华星光电技术有限公司 驱动电路及显示装置
CN113433720B (zh) * 2021-06-17 2022-05-06 惠科股份有限公司 一种液晶显示面板测试方法及设备
CN116665568B (zh) * 2023-06-01 2026-04-24 云谷（固安）科技有限公司 显示面板老化控制方法、装置及电子设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1566980A (zh) * 2003-06-20 2005-01-19 统宝光电股份有限公司 老化测试系统
CN101527305A (zh) * 2008-03-07 2009-09-09 中华映管股份有限公司 有源元件阵列基板
US20100033110A1 (en) * 2008-08-07 2010-02-11 Hung Jen Chien Led driver and power control circuit with spread spectrum frequency modulation function and display panel using the same
CN203691242U (zh) * 2013-12-19 2014-07-02 东文高压电源（天津）有限公司 由555构成的可调压调流高性能负激光器电源电路

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10013907B2 (en) * 2004-12-15 2018-07-03 Ignis Innovation Inc. Method and system for programming, calibrating and/or compensating, and driving an LED display
KR101493487B1 (ko) * 2008-06-09 2015-03-06 삼성디스플레이 주식회사 구동 장치, 이를 포함하는 액정표시장치 및 이의 구동방법
CN102857099B (zh) * 2011-06-30 2014-12-31 鸿富锦精密工业（深圳）有限公司 电流平衡电路
CN203085128U (zh) * 2012-11-23 2013-07-24 昆山龙腾光电有限公司 老化测试系统
CN104361859B (zh) * 2014-11-18 2017-01-11 深圳市华星光电技术有限公司 显示装置及其亮度调节方法
KR102424434B1 (ko) * 2015-10-30 2022-07-25 삼성디스플레이 주식회사 타이밍 컨트롤러를 포함하는 표시 장치 및 타이밍 컨트롤러의 양방향 통신 방법
CN105511546B (zh) * 2015-12-01 2017-05-03 深圳市华星光电技术有限公司 gamma参考电压纹波过滤电路以及液晶显示器
US9959800B1 (en) * 2016-01-18 2018-05-01 Shenzhen China Star Optoelectronics Technology Co., Ltd Voltage compensation circuits and voltage compensation methods thereof
CN108073213A (zh) * 2016-11-17 2018-05-25 成都华为技术有限公司 单板电源电压在线调整电路
CN206413225U (zh) * 2016-12-30 2017-08-15 深圳市崧盛电子股份有限公司 一种支持pwm反逻辑led调光电路及led驱动电源
US10678092B2 (en) * 2017-06-23 2020-06-09 Apple Inc. Display backlight headroom control systems and methods
CN107393481B (zh) * 2017-08-23 2019-12-06 京东方科技集团股份有限公司 有机发光二极管oled的寿命老化方法和系统
US20190206338A1 (en) * 2017-12-29 2019-07-04 Shenzhen China Star Optoelectronics Technology Co. Ltd. Voltage control circuit, display device and voltage control method
CN109194331B (zh) * 2018-08-29 2021-10-26 苏州瑞迈斯医疗科技有限公司 电子装置以及校正该电子装置中比较器的方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1566980A (zh) * 2003-06-20 2005-01-19 统宝光电股份有限公司 老化测试系统
CN101527305A (zh) * 2008-03-07 2009-09-09 中华映管股份有限公司 有源元件阵列基板
US20100033110A1 (en) * 2008-08-07 2010-02-11 Hung Jen Chien Led driver and power control circuit with spread spectrum frequency modulation function and display panel using the same
CN203691242U (zh) * 2013-12-19 2014-07-02 东文高压电源（天津）有限公司 由555构成的可调压调流高性能负激光器电源电路

Also Published As

Publication number Publication date
CN109637404B (zh) 2020-12-29
US11663943B2 (en) 2023-05-30
CN109637404A (zh) 2019-04-16
US20210319732A1 (en) 2021-10-14

Similar Documents

Publication Publication Date Title
WO2020103193A1 (zh) 驱动电路和显示面板
WO2020103205A1 (zh) 驱动电路和显示面板
US9886879B2 (en) Liquid crystal display and method for testing liquid crystal display
CN109523957B (zh) 驱动电路、背光模组和显示面板
US8976164B2 (en) Circuit for eliminating shutdown afterimages of a display device
US11688360B2 (en) Overcurrent protection circuit and display drive device
CN107340415B (zh) 一种信号补偿器及其信号补偿方法、信号补偿系统
CN100543530C (zh) 液晶显示装置及其显示方法
CN109616061A (zh) 源极驱动芯片保护电路、显示面板驱动电路和显示装置
CN101527120A (zh) 驱动光源的方法、光源装置和具有该光源装置的显示装置
WO2021004087A1 (zh) 屏体检测电路、显示屏以及屏体检测方法
WO2014048006A1 (zh) 一种液晶面板的驱动电路、液晶面板及液晶显示装置
CN101315472A (zh) 液晶显示面板的检测电路与方法及其液晶显示面板
CN115188310B (zh) 源级驱动芯片及其控制方法
CN209281854U (zh) 源极驱动芯片保护电路、显示面板驱动电路和显示装置
US11210974B2 (en) Driving circuit of display apparatus
CN104882104A (zh) 一种液晶显示面板及装置
CN109584763B (zh) 驱动电路和显示面板
CN101989001B (zh) 液晶显示器的共同电压产生电路
CN108172184A (zh) 关机放电电路和显示模组
CN110310608B (zh) 液晶显示面板的控制电路、测试设备和测试方法
CN116312298B (zh) 显示设备及其过电流检测方法
CN103050091A (zh) 发光二极管的驱动电路与其残影消除电路
CN109586568A (zh) 驱动电路和显示面板
KR20150073460A (ko) 표시장치의 테스트장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18940592

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 17/09/2021)

122 Ep: pct application non-entry in european phase

Ref document number: 18940592

Country of ref document: EP

Kind code of ref document: A1