CN111402812B - Adjusting module, testing method and display device - Google Patents
Adjusting module, testing method and display device Download PDFInfo
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- CN111402812B CN111402812B CN202010342919.4A CN202010342919A CN111402812B CN 111402812 B CN111402812 B CN 111402812B CN 202010342919 A CN202010342919 A CN 202010342919A CN 111402812 B CN111402812 B CN 111402812B
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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]
- G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention provides an adjusting module, a testing method and a display device. The adjusting module is applied to a display device, the display device comprises a power management integrated circuit and a display panel, and the display panel comprises a pixel circuit; the power management integrated circuit outputs power supply voltage to the pixel circuit through a power supply voltage output end; the device is characterized in that the adjusting module comprises a feedback circuit and an adjusting circuit; the feedback circuit is used for feeding back the voltage of a specific point on the power supply voltage output line to the regulating circuit; the power supply voltage output line is a connecting line between the power supply voltage output end and the pixel circuit; the voltage of a specific point on the power supply voltage output line is a feedback voltage; the regulating circuit is used for receiving the feedback voltage through a feedback voltage input end and regulating the power supply voltage output by the power supply management integrated circuit through the power supply voltage output end according to the feedback voltage. The invention stabilizes the display color capability of the display device.
Description
Technical Field
The invention relates to the technical field of display, in particular to an adjusting module, a testing method and a display device.
Background
Another important evaluation index for evaluating the display uniformity of an AMOLED (Active-matrix organic light-emitting diode) display device is Δ E4, which is used to evaluate the magnitude of variation difference of luminance and color coordinates of the AMOLED display device when the OPR (Open Pixel Ratio) of the AMOLED display device changes, and the smaller the Δ E4 value is, the better the color retention is, and the more accurate the color display is.
Disclosure of Invention
The invention mainly aims to provide an adjusting module, a testing method and a display device, and solves the problem that in the prior art, when the OPR of the display device is changed, the difference between the front and back changes of the brightness and the color coordinate of the display device is large due to the fact that IR voltage drops of power supply voltages under different OPRs are different.
In order to achieve the above object, the present invention provides a regulating module applied to a display device, where the display device includes a power management integrated circuit and a display panel, and the display panel includes a pixel circuit; the power management integrated circuit outputs power supply voltage to the pixel circuit through a power supply voltage output end; the adjusting module comprises a feedback circuit and an adjusting circuit;
the feedback circuit is used for feeding back the voltage of a specific point on the power supply voltage output line to the regulating circuit; the power supply voltage output line is a connecting line between the power supply voltage output end and the pixel circuit; the voltage of a specific point on the power supply voltage output line is a feedback voltage;
the regulating circuit is used for receiving the feedback voltage through a feedback voltage input end and regulating the power supply voltage output by the power supply management integrated circuit through the power supply voltage output end according to the feedback voltage.
Optionally, the display device includes a host; the power management integrated circuit is arranged in the host;
the specific point is within the host.
Optionally, the feedback circuit includes a first feedback resistor, and a resistance value of the first feedback resistor is 0 ohm;
a first end of the first feedback resistor is electrically connected to the specific point, and a second end of the first feedback resistor is electrically connected to the feedback voltage input terminal.
Optionally, the display device includes a main flexible circuit board;
the specific point is within the main flexible circuit board.
Optionally, the feedback circuit includes a second feedback resistor, and a resistance value of the second feedback resistor is 0 ohm;
a first end of the second feedback resistor is electrically connected to the specific point, and a second end of the second feedback resistor is electrically connected to the feedback voltage input terminal.
Optionally, the specific point is within the display panel.
Optionally, the feedback circuit includes a third feedback resistor, and a resistance value of the third feedback resistor is 0 ohm;
a first end of the third feedback resistor is electrically connected to the specific point, and a second end of the third feedback resistor is electrically connected to the feedback voltage input terminal.
Optionally, the feedback circuit includes a switch control circuit, a first switch element, a second switch element, and a third switch element; the specific points comprise a first specific point, a second specific point and a third specific point;
a control terminal of the first switching element is electrically connected to the switching control circuit, a first terminal of the first switching element is electrically connected to a first specific point, and a second terminal of the first switching element is electrically connected to the feedback voltage input terminal;
a control terminal of the second switching element is electrically connected to the switching control circuit, a first terminal of the second switching element is electrically connected to a second specific point, and a second terminal of the second switching element is electrically connected to the feedback voltage input terminal;
a control terminal of the third switching element is electrically connected to the switch control circuit, a first terminal of the third switching element is electrically connected to a third specific point, and a second terminal of the third switching element is electrically connected to the feedback voltage input terminal;
the switch control circuit is configured to control a first switch control signal to be provided to the control terminal of the first switch element, a second switch control signal to be provided to the control terminal of the second switch element, and a third switch control signal to be provided to the control terminal of the third switch element, so as to control the voltage at the first specific point, the voltage at the second specific point, or the voltage at the third specific point to be fed back to the feedback voltage input terminal.
Optionally, the adjusting circuit is disposed in the power management integrated circuit.
The invention also provides a test method applied to the adjusting module, and the test method comprises the following steps:
selecting a specific point on the power supply voltage output line;
the feedback circuit feeds the voltage of the specific point back to a feedback voltage input end of the regulating circuit;
the regulating circuit regulates the power supply voltage output by the power supply management integrated circuit according to the voltage.
Optionally, the display device includes a host, a main flexible circuit board, and a display panel;
the specific point is within the host, the main flexible circuit board, or the display panel.
Optionally, the feedback circuit includes a switch control circuit, a first switch element, a second switch element, and a third switch element; a control terminal of the first switching element is electrically connected to the switching control circuit, a first terminal of the first switching element is electrically connected to a first specific point, and a second terminal of the first switching element is electrically connected to the feedback voltage input terminal; a control terminal of the second switching element is electrically connected to the switching control circuit, a first terminal of the second switching element is electrically connected to a second specific point, and a second terminal of the second switching element is electrically connected to the feedback voltage input terminal; a control terminal of the third switching element is electrically connected to the switch control circuit, a first terminal of the third switching element is electrically connected to a third specific point, and a second terminal of the third switching element is electrically connected to the feedback voltage input terminal;
the test method comprises the following steps:
selecting a first specific point, a second specific point and a third specific point on a power supply voltage output line;
the switch control circuit controls the first switch element, the second switch element or the third switch element to be conducted so as to control feedback voltage to the feedback voltage input end; the feedback voltage is the voltage of a first specific point, the voltage of a second specific point or the voltage of a third specific point;
and the regulating circuit regulates the power supply voltage output by the power supply management integrated circuit according to the feedback voltage.
Optionally, the display device includes a host, a main flexible circuit board, and a display panel;
the first specific point is within the host, the second specific point is within the main flexible circuit board, and the third specific point is within the display panel.
The invention also provides a display device which comprises the adjusting module.
Optionally, the display device includes a power management integrated circuit and a display panel, and the display panel includes a pixel circuit; the power management integrated circuit outputs power supply voltage to the pixel circuit through a power supply voltage output end;
the adjusting circuit that the adjusting module includes sets up in power management integrated circuit.
Compared with the prior art, the adjusting module, the testing method and the display device provided by the invention feed back the voltage of a specific point on the power supply voltage output line to the adjusting circuit through the feedback circuit, and adjust the power supply voltage output by the power supply management integrated circuit through the power supply voltage output end through the adjusting circuit according to the feedback voltage, so that when the OPR (Open Pixel Ratio) of the display device is changed, the power supply voltage is stable, the value of delta E4 can be reduced, and the color display capability of the display device is stabilized.
Drawings
FIG. 1 is a block diagram of an adjustment module according to an embodiment of the present invention;
FIG. 2 is a diagram of a display device to which the adjusting module of the present invention is applied;
FIG. 3 is a block diagram of another embodiment of a display device to which the adjusting module of the present invention is applied;
FIG. 4 is a structural diagram of a display device to which the adjusting module of the present invention is applied;
FIG. 5 is a schematic diagram of a display device to which the adjusting module of the present invention is applied;
fig. 6 is a structural diagram of a display device to which the adjusting module of the present invention is applied.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The transistors used in all embodiments of the present invention may be transistors, thin film transistors, or field effect transistors or other devices with the same characteristics. In the embodiment of the present invention, in order to distinguish two poles of the transistor except the control pole, one pole is called a first pole, and the other pole is called a second pole.
In practical operation, when the transistor is a triode, the control electrode may be a base electrode, the first electrode may be a collector electrode, and the second electrode may be an emitter electrode; alternatively, the control electrode may be a base electrode, the first electrode may be an emitter electrode, and the second electrode may be a collector electrode.
In practical operation, when the transistor is a thin film transistor or a field effect transistor, the control electrode may be a gate electrode, the first electrode may be a drain electrode, and the second electrode may be a source electrode; alternatively, the control electrode may be a gate electrode, the first electrode may be a source electrode, and the second electrode may be a drain electrode.
The adjusting module is applied to a display device, the display device comprises a power management integrated circuit and a display panel, and the display panel comprises a pixel circuit; the power management integrated circuit outputs power supply voltage to the pixel circuit through a power supply voltage output end; the adjusting module comprises a feedback circuit and an adjusting circuit;
the feedback circuit is used for feeding back the voltage of a specific point on the power supply voltage output line to the regulating circuit; the power supply voltage output line is a connecting line between the power supply voltage output end and the pixel circuit; the voltage of a specific point on the power supply voltage output line is a feedback voltage;
the regulating circuit is used for receiving the feedback voltage through a feedback voltage input end and regulating the power supply voltage output by the power supply management integrated circuit through the power supply voltage output end according to the feedback voltage.
The adjusting module according to the embodiment of the present invention feeds back the voltage at a specific point on the power voltage output line to the adjusting circuit through the feedback circuit, and adjusts the power voltage output by the power management integrated circuit through the power voltage output terminal according to the feedback voltage through the adjusting circuit, so that when an Open Pixel Ratio (OPR) of the display device is changed, the power voltage is stable, thereby reducing a value of Δ E4 and stabilizing a color display capability of the display device.
In the related art, one of the important reasons for affecting the value of Δ E4 is: when the OPR of the AMOLED display device changes, the load on the display panel changes, and the most direct effect is that the IR Drop (IR Drop, which is a phenomenon indicating that the voltage drops or rises on the power supply and ground networks present in the integrated circuit) of the power supply voltage is different at different OPRs, so the power supply voltage drops at different nodes of the display panel are not uniform; when the power supply voltage varies inconsistently due to the change of the OPR, the difference of the front and back variation of the AMOLED display device such as the brightness and color coordinates is large. According to the embodiment of the invention, the power supply voltage is regulated through the regulating circuit, so that the power supply voltage can be stabilized, and the value of delta E4 can be reduced.
In an embodiment of the present invention, the display device may be an AMOLED (Active-matrix organic light-emitting diode) display device. In the AMOLED display device, a driving voltage Id for driving the luminance of the light emitting element in the pixel circuit is equal to K (Vdata-ELVDD)2(ii) a ELVDD is a voltage value of a power supply voltage received by the pixel circuit, Vdata is a data voltage written into the pixel circuit, and K is a process parameter of a driving transistor in the pixel circuit; when the ELVDD varies due to the change in the OPR, the difference in the change of parameters such as the luminance and color coordinates of the AMOLED display device between before and after is large, and therefore, the value of Δ E4 can be reduced by stabilizing the ELVDD, and the color display capability of the AMOLED display device can be stabilized.
In practical operation, Δ E4 is an important evaluation index for evaluating the display uniformity of the AMOLED display device, and Δ E4 is used for evaluating the variation difference of the AMOLED luminance and color coordinates when the OPR of the AMOLED display device is changed.
When the adjusting module according to the embodiment of the present invention is in operation, after the OPR of the display device changes, the feedback circuit feeds back the voltage of a specific point on the power supply voltage output line (the voltage is the feedback voltage) to the adjusting circuit, and if the ideal voltage value of the power supply voltage received by the pixel circuit in the display panel is 4.6V (but not limited thereto), the adjusting circuit adjusts the voltage value of the power supply voltage output by the power supply management integrated circuit through the power supply voltage output terminal according to the difference between the voltage value of the feedback voltage and 4.6V.
In an implementation, the adjusting circuit may be disposed in a power management integrated circuit, but is not limited thereto.
The adjusting module is applied to a display device, the display device comprises a power management integrated circuit and a display panel, and the display panel comprises a pixel circuit; the power management integrated circuit outputs power supply voltage to the pixel circuit through a power supply voltage output end; as shown in fig. 1, the adjusting module according to the embodiment of the present invention may include a feedback circuit 11 and an adjusting circuit 12;
the feedback circuit 11 is used for feeding back the voltage of a specific point on a power supply voltage output line to the regulating circuit 12; the power supply voltage output line is a connecting line between the power supply voltage output end and the pixel circuit; the voltage of a specific point on the power supply voltage output line is a feedback voltage;
the regulating circuit 12 is configured to receive the feedback voltage through a feedback voltage input terminal, and regulate a power supply voltage output by the power management integrated circuit (not shown in fig. 1) through the power supply voltage output terminal according to the feedback voltage.
The adjusting module according to the embodiment of the present invention feeds back the voltage of a specific point on the power voltage output line to the adjusting circuit 12 through the feedback circuit 11, and adjusts the power voltage output by the power management integrated circuit through the power voltage output terminal according to the feedback voltage through the adjusting circuit 12, so that when an Open Pixel Ratio (OPR) of the display device is changed, the power voltage is stable, thereby reducing a value of Δ E4 and stabilizing a color display capability of the display device.
In particular, an embodiment of the pixel circuit may include a driving transistor, a data writing transistor, and an organic light emitting diode;
the source electrode of the driving transistor can be connected with power voltage, and the drain electrode of the driving transistor can be electrically connected with the anode of the organic light-emitting diode; the cathode of the organic light emitting diode can be connected with low voltage;
a gate electrode of the data writing transistor may be electrically connected to the gate line, a source electrode of the data writing transistor may be electrically connected to the data line, and a drain electrode of the data writing transistor may be electrically connected to the gate electrode of the driving transistor.
The above description is only an example of the structure of the pixel circuit, and is not intended to limit the structure of the pixel circuit.
In a specific implementation, the display device may include a host, an MFPC (main flexible circuit board), a COF (Chip On Film), and a display panel, the power management integrated circuit may be disposed in the host, and the adjusting circuit may be disposed in the power management integrated circuit; the display panel comprises a plurality of rows and a plurality of columns of pixel circuits;
the power supply voltage output line sequentially passes through the host, the connector, the main flexible circuit board and the chip on film and extends to the display panel to provide power supply voltage for the pixel circuit included by the display panel.
A driving chip is arranged in the chip on film; in the main flexible circuit board, peripheral circuits are provided, which may include electronic devices such as capacitors and/or diodes.
In particular implementations, the specific point may be located within the host; and/or, the specific point may be disposed within the main flexible circuit board; and/or the specific point may be provided within the display panel.
In practical operation, when the specific point is set in the host, the embodiment of the invention stabilizes the power supply voltage at the host end; when the specific point is arranged in the main flexible circuit board, the embodiment of the invention stabilizes the power supply voltage of the MFPC end; however, when the specific point is set in the display panel, the embodiment of the invention stabilizes the power voltage at the display panel end.
In particular implementations, the display device may include a host; the power management integrated circuit is arranged in the host;
the specific point is within the host.
The adjusting module of the embodiment of the invention is applied to a display device, as shown in fig. 2, the display device includes a host M1, a power management integrated circuit P0, a display panel P1, a main flexible circuit board M2, a flip chip film 20 and a connector 10, the display panel P1 includes a plurality of rows and columns of pixel circuits (not shown in fig. 2); the power management integrated circuit P0 outputs a power supply voltage to the pixel circuit through a power supply voltage output terminal E0; the adjusting module comprises a feedback circuit 11 and an adjusting circuit 12;
the host M1 is electrically connected with the main flexible circuit board M2 through the connector 10;
the feedback circuit 11 is used for feeding back the voltage of a specific point S0 on the power supply voltage output line to the regulating circuit 12; the power supply voltage output line is a connecting line between the power supply voltage output end E0 and the pixel circuit; the voltage of a specific point S0 on the power supply voltage output line is a feedback voltage;
the regulating circuit 12 is configured to receive the feedback voltage through a feedback voltage input terminal FBS, and regulate the power supply voltage output by the power supply management integrated circuit P0 through the power supply voltage output terminal E0 according to the feedback voltage.
In the embodiment shown in fig. 2, the regulating circuit 12 is disposed in the power management integrated circuit P0, and the feedback circuit 11 and the power management integrated circuit P0 may be disposed in the host M1.
As shown in fig. 2, the host M1, the main flexible circuit board M2 and the flip-chip film 20 are arranged along a direction close to the display panel P1;
in the embodiment shown in fig. 2, the specific point S0 is disposed in the host M1.
As shown in fig. 2, the power supply voltage output lines include a first output line L1, two second output lines L2 arranged in parallel, a first connection line L01 arranged between the two second output lines L2, a third output line L3 arranged in a peripheral region of the display panel P1, a plurality of power supply voltage lines LE arranged in a display region of the display panel, and a second connection line L02 between a third output line L3 and the power supply voltage lines LE;
l1, L2, L3, L01, LE and L02 are electrically connected to each other;
the power supply voltage line LE is electrically connected to a pixel circuit (not shown in fig. 2) disposed in a display region of the display panel P1;
the first output line L1 may extend in a first direction, but is not limited thereto; the first direction may be a direction parallel to a data line (not shown in fig. 2) included in the display panel P1, but is not limited thereto;
the third output line L3 may extend in a second direction;
the plurality of power voltage lines LE may extend in a first direction;
the second direction may be a direction parallel to a gate line (not shown in fig. 2) included in the display panel P1, but is not limited thereto.
In the embodiment shown in fig. 2, the first direction may be a horizontal direction, and the second direction may be a vertical direction, but not limited thereto.
In the embodiment shown in fig. 2, the specific point S0 is disposed within the host M1.
The structure of the power supply voltage output line as shown in fig. 2 is for example only, and the structure of the power supply voltage output line is not limited.
In the embodiment of the present invention, the specific point may be any point of the portion of the power supply voltage output line within the host M1, the main flexible circuit board M2, and the display panel P1.
Optionally, the feedback circuit may include a first feedback resistor, and a resistance value of the first feedback resistor is 0 ohm;
a first end of the first feedback resistor is electrically connected to the specific point, and a second end of the first feedback resistor is electrically connected to the feedback voltage input terminal.
In particular implementations, the display device may include a main flexible circuit board;
the specific point is within the main flexible circuit board.
The adjusting module of the embodiment of the invention is applied to a display device, as shown in fig. 3, the display device includes a host M1, a connector 10, a power management integrated circuit P0, a display panel P1, a main flexible circuit board M2 and a flip chip film 20, the display panel P1 includes a plurality of rows and columns of pixel circuits (not shown in fig. 3); the power management integrated circuit P0 outputs a power supply voltage to the pixel circuit through a power supply voltage output terminal E0; the adjusting module comprises a feedback circuit 11 and an adjusting circuit 12;
the host M1 is electrically connected with the main flexible circuit board M2 through the connector 10;
the feedback circuit 11 is used for feeding back the voltage of a specific point S0 on the power supply voltage output line to the regulating circuit 12; the power supply voltage output line is a connecting line between the power supply voltage output end E0 and the pixel circuit; the voltage of a specific point S0 on the power supply voltage output line is a feedback voltage;
the regulating circuit 12 is configured to receive the feedback voltage through a feedback voltage input terminal FBS, and regulate the power supply voltage output by the power supply management integrated circuit P0 through the power supply voltage output terminal E0 according to the feedback voltage.
In the embodiment shown in fig. 3, the regulating circuit 12 is disposed in the power management integrated circuit P0, and the feedback circuit 11 and the power management integrated circuit P0 may be disposed in the host M1.
As shown in fig. 3, the host M1, the main flexible circuit board M2 and the flip-chip film 20 are arranged along a direction close to the display panel P1;
in the embodiment shown in fig. 3, the specific point S0 is disposed in the main flexible circuit board M2, but not limited thereto.
As shown in fig. 3, the power supply voltage output lines include a first output line L1, two second output lines L2 arranged in parallel, a first connection line L01 arranged between the two second output lines L2, a third output line L3 arranged in a peripheral region of the display panel P1, a plurality of power supply voltage lines LE arranged in a display region of the display panel, and a second connection line L02 between a third output line L3 and the power supply voltage lines LE;
l1, L2, L3, L01, LE and L02 are electrically connected to each other;
the power supply voltage line LE is electrically connected to a pixel circuit (not shown in fig. 3) disposed in a display region of the display panel P1;
the first output line L1 may extend in a first direction, but is not limited thereto; the first direction may be a direction parallel to a data line (not shown in fig. 3) included in the display panel P1, but is not limited thereto;
the third output line L3 may extend in a second direction;
the plurality of power voltage lines LE may extend in a first direction;
the second direction may be a direction parallel to a gate line (not shown in fig. 3) included in the display panel P1, but is not limited thereto.
In the embodiment shown in fig. 3, the first direction may be a horizontal direction, and the second direction may be a vertical direction, but not limited thereto.
In the embodiment shown in fig. 3, the specific point S0 is disposed in the main flexible circuit board M2, and the specific point S0 is disposed on the second output line L2. When the specific point S0 is disposed in the main flexible circuit board M2, the specific point S0 may also be disposed on the first connection line L01 and/or the first output line L1, but not limited thereto.
The structure of the power supply voltage output line as shown in fig. 3 is for example only, and the structure of the power supply voltage output line is not limited.
In the embodiment of the present invention, the number of the second output lines L2 may be at least one, and is not limited to three.
In the embodiment of the present invention, the specific point may be any point of the portion of the power supply voltage output line within the host M1, the main flexible circuit board M2, and the display panel P1.
Optionally, the feedback circuit may include a second feedback resistor, and a resistance value of the second feedback resistor is 0 ohm;
a first end of the second feedback resistor is electrically connected to the specific point, and a second end of the second feedback resistor is electrically connected to the feedback voltage input terminal.
In particular implementations, the specific point may be within the display panel.
The adjusting module of the embodiment of the invention is applied to a display device, as shown in fig. 4, the display device includes a host M1, a connector 10, a power management integrated circuit P0, a display panel P1, a main flexible circuit board M2 and a flip chip film 20, the display panel P1 includes a plurality of rows and columns of pixel circuits (not shown in fig. 4); the power management integrated circuit P0 outputs a power supply voltage to the pixel circuit through a power supply voltage output terminal E0; the adjusting module comprises a feedback circuit 11 and an adjusting circuit 12;
the host M1 is electrically connected with the main flexible circuit board M2 through the connector 10;
the feedback circuit 11 is used for feeding back the voltage of a specific point on a power supply voltage output line to the regulating circuit 12; the power supply voltage output line is a connecting line between the power supply voltage output end E0 and the pixel circuit; the voltage of a specific point on the power supply voltage output line is a feedback voltage;
the regulating circuit 12 is configured to receive the feedback voltage through a feedback voltage input terminal FBS, and regulate the power supply voltage output by the power supply management integrated circuit P0 through the power supply voltage output terminal E0 according to the feedback voltage.
In the embodiment shown in fig. 4, the regulating circuit 12 is disposed in the power management integrated circuit P0, and the feedback circuit 11 and the power management integrated circuit P0 may be disposed in the host M1.
As shown in fig. 4, the host M1, the main flexible circuit board M2 and the flip-chip film 20 are arranged along a direction close to the display panel P1;
in the embodiment shown in fig. 4, the specific point is provided in the display panel P1.
As shown in fig. 4, the power supply voltage output lines include a first output line L1, two second output lines L2 arranged in parallel, a first connection line L01 arranged between the two adjacent second output lines L2, a third output line L3 arranged in a peripheral region of the display panel P1, a plurality of power supply voltage lines LE arranged in a display region of the display panel, and a second connection line L02 between a third output line L3 and the power supply voltage lines LE;
l1, L2, L3, L01, LE and L02 are electrically connected to each other;
the power supply voltage line LE is electrically connected to a pixel circuit (not shown in fig. 4) disposed in a display region of the display panel P1;
the first output line L1 may extend in a first direction, but is not limited thereto; the first direction may be a direction parallel to a data line (not shown in fig. 4) included in the display panel P1, but is not limited thereto;
the third output line L3 may extend in a second direction;
the plurality of power voltage lines LE may extend in a first direction;
the second direction may be a direction parallel to a gate line (not shown in fig. 4) included in the display panel P1, but is not limited thereto.
In the embodiment shown in fig. 4, the first direction may be a horizontal direction, and the second direction may be a vertical direction, but not limited thereto.
In the embodiment shown in fig. 4, a specific point S0 is disposed within the display panel P1.
The structure of the power supply voltage output line as shown in fig. 4 is for example only, and the structure of the power supply voltage output line is not limited.
In practical implementation, in the embodiment shown in fig. 4, the specific point S0 is disposed in the display panel P1, and the specific point S0 is disposed on the third output line L3. When the specific point S0 is disposed in the display panel P1, the specific point S0 may also be disposed on the power voltage line LE and/or the second connecting line L02, but not limited thereto.
In the embodiment of the present invention, the specific point may be any point of the portion of the power supply voltage output line within the host M1, the main flexible circuit board M2, and the display panel P1.
Optionally, the feedback circuit includes a third feedback resistor, and a resistance value of the third feedback resistor is 0 ohm;
a first end of the third feedback resistor is electrically connected to the specific point, and a second end of the third feedback resistor is electrically connected to the feedback voltage input terminal.
As shown in fig. 5, the adjusting module according to the embodiment of the present invention is applied to a display device, as shown in fig. 5, the display device includes a host M1, a connector 10, a power management integrated circuit P0, a display panel P1, a main flexible circuit board M2 and a flip-chip film 20, wherein the display panel P1 includes a plurality of rows and columns of pixel circuits (not shown in fig. 5); the power management integrated circuit P0 outputs a power supply voltage to the pixel circuit through a power supply voltage output terminal E0; the adjusting module comprises a feedback circuit 11 and an adjusting circuit 12;
the host M1 is electrically connected with the main flexible circuit board M2 through the connector 10;
the feedback circuit 11 is used for feeding back the voltage of a specific point on a power supply voltage output line to the regulating circuit 12; the power supply voltage output line is a connecting line between the power supply voltage output end E0 and the pixel circuit; the voltage of a specific point on the power supply voltage output line is a feedback voltage;
the regulating circuit 12 is configured to receive the feedback voltage through a feedback voltage input terminal FBS, and regulate the power supply voltage output by the power supply management integrated circuit P0 through the power supply voltage output terminal E0 according to the feedback voltage.
In the embodiment shown in fig. 5, the regulating circuit 12 is disposed in the power management integrated circuit P0, and the feedback circuit 11 and the power management integrated circuit P0 may be disposed in the host M1.
As shown in fig. 5, the host M1, the main flexible circuit board M2 and the flip-chip film 20 are arranged along a direction close to the display panel P1;
as shown in fig. 5, the power supply voltage output lines include a first output line L1, two second output lines L2 arranged in parallel, a first connection line L01 arranged between the two second output lines L2, a third output line L3 arranged in a peripheral region of the display panel P1, a plurality of power supply voltage lines LE arranged in a display region of the display panel, and a second connection line L02 between a third output line L3 and the power supply voltage lines LE;
l1, L2, L3, L01, LE and L02 are electrically connected to each other;
the power supply voltage line LE is electrically connected to a pixel circuit (not shown in fig. 5) disposed in a display region of the display panel P1;
the first output line L1 may extend in a first direction, but is not limited thereto; the first direction may be a direction parallel to a data line (not shown in fig. 5) included in the display panel P1, but is not limited thereto;
the third output line L3 may extend in a second direction;
the plurality of power voltage lines LE may extend in a first direction;
the second direction may be a direction parallel to a gate line (not shown in fig. 5) included in the display panel P1, but is not limited thereto.
In the embodiment shown in fig. 5, the first direction may be a horizontal direction, and the second direction may be a vertical direction, but not limited thereto.
In the embodiment shown in fig. 5, reference numeral C1 is a first parasitic capacitor, reference numeral C2 is a second parasitic capacitor, and reference numeral GND is a ground terminal.
In the embodiment shown in fig. 5, the feedback circuit 11 may include a first feedback resistor R1, a second feedback resistor R2, and a third feedback resistor R3; the resistance value of R1, the resistance value of R2, and the resistance value of R3 may all be 0 ohms;
a second end of the R1 is electrically connected to the first specific point S1;
a second end of the R2 is electrically connected to the second specific point S2;
the second end of the R3 is electrically connected to the third specific point S3.
When the embodiment of the adjusting module shown in fig. 5 of the present invention is in operation, when the voltage of the second specific point S2 is fed back by using R2, the first end of R2 is controlled to be electrically connected to the FBS, the first end of R1 is controlled not to be connected to the FBS, and the first end of R3 is controlled not to be connected to the FBS;
when the embodiment of the adjusting module shown in fig. 5 of the present invention is in operation, when it is selected to use R1 to feed back the voltage of the first specific point S1, the R1 is controlled to be electrically connected to the FBS, the first end of the R2 is controlled to be not electrically connected to the FBS, and the first end of the R3 is controlled to be not electrically connected to the FBS;
when the embodiment of the adjusting module shown in fig. 5 of the present invention is in operation, when the voltage of the third specific point S3 is fed back by using R3, the first end of R3 is controlled to be electrically connected to the FBS, the first end of R1 is controlled to be electrically disconnected from the FBS, and the first end of R2 is controlled to be electrically disconnected from the FBS.
The operation of the embodiment of the conditioning module shown in fig. 5 is illustrated below with the voltage selected using R2 feedback S2.
When the embodiment of the adjusting module shown in FIG. 5 is in operation, the first end of the control R1 is not electrically connected with the FBS, the first end of the control R3 is not electrically connected with the FBS, and the first end of the control R2 is electrically connected with the FBS;
the testing method comprises the following steps of testing 10 AMOLED display devices in total, wherein the ideal voltage value of power supply voltage required by pixel circuits in a display panel in the AMOLED display device is 4.6V, and after the embodiment of the adjusting module shown in FIG. 5 is adopted for adjusting the power supply voltage, the voltage of S2 is increased by 0.03V, the IR voltage drop on a power supply voltage output line is effectively reduced, and the power supply voltage at the S2 position is stabilized;
after the embodiment of the invention, as shown in fig. 5, is adopted to adjust the power supply voltage, when the OPR is changed from 100% to 30%, Δ E4 of 10 AMOLED display devices decreases by 0.04-0.19, which stabilizes the color display capability of the AMOLED display devices.
The test results for testing 10 AMOLED display devices are as follows:
for the 10 AMOLED display devices, when the embodiment of the adjusting module shown in fig. 5 of the present invention is adopted and the first end of R2 is electrically connected to the FBS, the voltage of S2 is 4.57V, and when the adjusting module is not adopted, the voltage of S2 is 4.54V;
for the first AMOLED display device, Δ E4 was 5.29 when the OPR was 100%, and Δ E4 was 5.20 when the OPR was 30%;
for the second AMOLED display device, Δ E4 was 5.28 at an OPR of 100%, and Δ E4 was 5.17 at an OPR of 30%;
for the third AMOLED display device, Δ E4 was 5.37 when the OPR was 100%, and Δ E4 was 5.23 when the OPR was 30%;
for the fourth AMOLED display device, Δ E4 was 5.3 when the OPR was 100%, and Δ E4 was 5.17 when the OPR was 30%;
for the fifth AMOLED display device, Δ E4 was 5.3 when the OPR was 100%, and Δ E4 was 5.23 when the OPR was 30%;
for the sixth AMOLED display device, Δ E4 was 5.27 when the OPR was 100%, and Δ E4 was 5.11 when the OPR was 30%;
for the seventh AMOLED display device, Δ E4 was 5.64 when the OPR was 100%, and Δ E4 was 5.54 when the OPR was 30%;
for the eighth AMOLED display device, Δ E4 was 5.23 when the OPR was 100%, and Δ E4 was 5.19 when the OPR was 30%;
for the ninth AMOLED display device, Δ E4 was 5.2 when the OPR was 100%, and Δ E4 was 5.01 when the OPR was 30%;
for the tenth AMOLED display device, Δ E4 was 5.61 when the OPR was 100%, and Δ E4 was 5.53 when the OPR was 30%.
Optionally, the feedback circuit may include a switch control circuit, a first switching element, a second switching element, and a third switching element; the specific points comprise a first specific point, a second specific point and a third specific point;
a control terminal of the first switching element is electrically connected to the switching control circuit, a first terminal of the first switching element is electrically connected to a first specific point, and a second terminal of the first switching element is electrically connected to the feedback voltage input terminal;
a control terminal of the second switching element is electrically connected to the switching control circuit, a first terminal of the second switching element is electrically connected to a second specific point, and a second terminal of the second switching element is electrically connected to the feedback voltage input terminal;
a control terminal of the third switching element is electrically connected to the switch control circuit, a first terminal of the third switching element is electrically connected to a third specific point, and a second terminal of the third switching element is electrically connected to the feedback voltage input terminal;
the switch control circuit is configured to control a first switch control signal to be provided to the control terminal of the first switch element, a second switch control signal to be provided to the control terminal of the second switch element, and a third switch control signal to be provided to the control terminal of the third switch element, so as to control the voltage at the first specific point, the voltage at the second specific point, or the voltage at the third specific point to be fed back to the feedback voltage input terminal.
In an embodiment of the present invention, the feedback circuit may include a switch control circuit, a first switching element, a second switching element, and a third switching element, and when the switch control circuit controls the first switching element to turn on the connection between the first specific point and the feedback voltage input terminal, the voltage of the first specific point is fed back to the regulating circuit; when the switch control circuit controls the second switch element to conduct the connection between the second specific point and the feedback voltage input end, the voltage of the second specific point is fed back to the regulating circuit; when the switch control circuit controls the third switching element to conduct the connection between the third specific point and the feedback voltage input end, the voltage of the third specific point is fed back to the regulating circuit.
In particular implementation, the display device may include a host, a main flexible circuit board, and a display panel;
the first specific point may be within the host, the second specific point may be within the main flexible circuit board, and the third specific point may be within the display panel.
As shown in fig. 6, the adjusting module according to the embodiment of the present invention is applied to a display device, as shown in fig. 6, the display device includes a host M1, a connector 10, a power management integrated circuit P0, a display panel P1, a main flexible circuit board M2 and a flip-chip film 20, wherein the display panel P1 includes a plurality of rows and columns of pixel circuits (not shown in fig. 6); the power management integrated circuit P0 outputs a power supply voltage to the pixel circuit through a power supply voltage output terminal E0; the adjusting module comprises a feedback circuit 11 and an adjusting circuit 12;
the host M1 is electrically connected with the main flexible circuit board M2 through the connector 10;
the feedback circuit 11 is used for feeding back the voltage of a specific point on a power supply voltage output line to the regulating circuit 12; the power supply voltage output line is a connecting line between the power supply voltage output end E0 and the pixel circuit; the voltage of a specific point on the power supply voltage output line is a feedback voltage;
the regulating circuit 12 is configured to receive the feedback voltage through a feedback voltage input terminal FBS, and regulate the power supply voltage output by the power supply management integrated circuit P0 through the power supply voltage output terminal E0 according to the feedback voltage.
In the embodiment shown in fig. 6, the regulating circuit 12 is disposed in the power management integrated circuit P0, and the feedback circuit 11 and the power management integrated circuit P0 may be disposed in the host M1.
As shown in fig. 6, the host M1, the main flexible circuit board M2 and the flip-chip film 20 are arranged along a direction close to the display panel P1;
as shown in fig. 6, the power supply voltage output lines include a first output line L1, two second output lines L2 arranged in parallel, a first connection line L01 arranged between the two second output lines L2, a third output line L3 arranged in a peripheral region of the display panel P1, a plurality of power supply voltage lines LE arranged in a display region of the display panel, and a second connection line L02 between a third output line L3 and the power supply voltage lines LE;
l1, L2, L3, L01, LE and L02 are electrically connected to each other;
the power supply voltage line LE is electrically connected to a pixel circuit (not shown in fig. 6) disposed in a display region of the display panel P1;
the first output line L1 may extend in a first direction, but is not limited thereto; the first direction may be a direction parallel to a data line (not shown in fig. 6) included in the display panel P1, but is not limited thereto;
the third output line L3 may extend in a second direction;
the plurality of power voltage lines LE may extend in a first direction;
the second direction may be a direction parallel to a gate line (not shown in fig. 6) included in the display panel P1, but is not limited thereto.
In the embodiment shown in fig. 6, the first direction may be a horizontal direction, and the second direction may be a vertical direction, but not limited thereto.
In the embodiment shown in fig. 6, reference numeral C1 is a first parasitic capacitor, reference numeral C2 is a second parasitic capacitor, and reference numeral GND is a ground terminal.
As shown in fig. 6, the feedback circuit 11 includes a switch control circuit 60, a first switching element K1, a second switching element K2, and a third switching element K3; the specific points include a first specific point S1, a second specific point S2, and a third specific point S3;
the first specific point S1 is disposed in the host M1, the second specific point S2 is disposed in the main flexible circuit board M2, and the third specific point S2 is disposed in the display panel P1;
a control terminal of the first switching element K1 is electrically connected to the switch control circuit 60, a first terminal of the first switching element K1 is electrically connected to a first specific point S1, and a second terminal of the first switching element K1 is electrically connected to the feedback voltage input terminal FBS;
a control terminal of the second switching element K2 is electrically connected to the switch control circuit 60, a first terminal of the second switching element K2 is electrically connected to a second specific point S2, and a second terminal of the second switching element K2 is electrically connected to the feedback voltage input terminal FBS;
a control terminal of the third switching element K2 is electrically connected to the switch control circuit 60, a first terminal of the third switching element K3 is electrically connected to a third specific point S3, and a second terminal of the third switching element K3 is electrically connected to the feedback voltage input terminal FBS;
the switch control circuit 60 is electrically connected to the control terminal of the first switch element K1, the control terminal of the second switch element K2 and the control terminal of the third switch element K3, respectively, and is configured to control the supply of a first switch control signal to the control terminal of the first switch element K1, the supply of a second switch control signal to the control terminal of the second switch element K2, and the supply of a third switch control signal to the control terminal of the third switch element K3, so as to control the feedback of the voltage at the first specific point S1, the voltage at the second specific point S2 or the voltage at the third specific point S3 to the feedback voltage input terminal FBS.
Specifically, the turning on of the first switching element K1 means: the first switching element K1 controls to turn on the connection between the first specific point S1 and the FBS;
the second switching element K2 being turned on means that: the second switching element K2 controls to turn on the connection between the second specific point S2 and FBS;
the third switching element K3 being conductive means: the third switching element K3 controls to turn on the connection between the third specific point S1 and the FBS.
In the embodiment of the adjusting module shown in fig. 6, the first switching element K1, the second switching element K2 and the third switching element K3 may be switching transistors, but not limited thereto.
In operation of the embodiment of the conditioning module of the present invention shown in figure 6,
when the switch control circuit 60 provides an effective first switch control signal to the control terminal of K1, K1 is turned on, the switch control circuit 60 provides an ineffective second switch control signal to the control terminal of K2, the switch control circuit 60 provides an ineffective third switch control signal to the control terminal of K3 to control K2 and K3 to be turned off, and the voltage of S1 is fed back to FBS;
when the switch control circuit 60 provides an effective second switch control signal to the control terminal of K2, K1 is turned on, and at this time, the switch control circuit 60 provides an ineffective first switch control signal to the control terminal of K1, and the switch control circuit 60 provides an ineffective third switch control signal to the control terminal of K3 so as to control K2 and K3 to be turned off, and the voltage of S2 is fed back to the FBS;
when the switch control circuit 60 provides an effective third switch control signal to the control terminal of K3, K3 is turned on, and at this time, the switch control circuit 60 provides an ineffective first switch control signal to the control terminal of K1, and the switch control circuit 60 provides an ineffective second switch control signal to the control terminal of K2, so as to control K2 and K3 to be turned off, and the voltage of S3 is fed back to the FBS.
In the embodiment of the present invention, the valid first switch control signal is a signal capable of turning on the first switch element K1, and the invalid first switch control signal is a signal capable of turning off the first switch element K1;
the active second switch control signal is a signal capable of turning on the second switch element K2, and the inactive second switch control signal is a signal capable of turning off the second switch element K2;
the active third switching control signal is a signal capable of turning on the third switching element K3, and the inactive third switching control signal is a signal capable of turning off the third switching element K3.
For example, when K1 is the first switch transistor and the first switch transistor is the n-type transistor, the active first switch control signal is the high voltage signal and the inactive first switch signal is the low voltage signal, but not limited thereto;
when K2 is the second switch transistor and the second switch transistor is the n-type transistor, the active second switch control signal is the high voltage signal and the inactive second switch signal is the low voltage signal, but not limited to this;
when K3 is the third switching transistor and the third switching transistor is an n-type transistor, the active third switching control signal is a high voltage signal and the inactive third switching signal is a low voltage signal, but not limited thereto.
The invention also provides a test method, which is applied to the adjusting module; the test method comprises the following steps:
selecting a specific point on the power supply voltage output line;
the feedback circuit feeds the voltage of the specific point back to a feedback voltage input end of the regulating circuit;
the regulating circuit regulates the power supply voltage output by the power supply management integrated circuit according to the voltage.
In the testing method according to the embodiment of the present invention, the voltage of a specific point on the power supply voltage output line is fed back to the adjusting circuit through the feedback circuit, and the power supply voltage output by the power supply management integrated circuit through the power supply voltage output end is adjusted through the adjusting circuit according to the feedback voltage, so that when an Open Pixel Ratio (OPR) of the display device is changed, the power supply voltage is stable, thereby reducing a value of Δ E4 and stabilizing a color display capability of the display device.
Specifically, the display device may include a host, a main flexible circuit board, and a panel; the power management integrated circuit is arranged in the host;
the specific point may be within the host, the main flexible circuit board or the display panel.
In particular implementations, the feedback circuit may include a switch control circuit, a first switching element, a second switching element, and a third switching element; a control terminal of the first switching element is electrically connected to the switching control circuit, a first terminal of the first switching element is electrically connected to a first specific point, and a second terminal of the first switching element is electrically connected to the feedback voltage input terminal; a control terminal of the second switching element is electrically connected to the switching control circuit, a first terminal of the second switching element is electrically connected to a second specific point, and a second terminal of the second switching element is electrically connected to the feedback voltage input terminal; a control terminal of the third switching element is electrically connected to the switch control circuit, a first terminal of the third switching element is electrically connected to a third specific point, and a second terminal of the third switching element is electrically connected to the feedback voltage input terminal;
the test method may include:
selecting a first specific point, a second specific point and a third specific point on a power supply voltage output line;
the switch control circuit controls the first switch element, the second switch element or the third switch element to be conducted so as to control feedback voltage to the feedback voltage input end; the feedback voltage is the voltage of a first specific point, the voltage of a second specific point or the voltage of a third specific point;
and the regulating circuit regulates the power supply voltage output by the power supply management integrated circuit according to the feedback voltage.
In an embodiment of the present invention, the feedback circuit may include a switch control circuit, a first switching element, a second switching element, and a third switching element, and when the switch control circuit controls the first switching element to turn on the connection between the first specific point and the feedback voltage input terminal, the voltage of the first specific point is fed back to the regulating circuit; when the switch control circuit controls the second switch element to conduct the connection between the second specific point and the feedback voltage input end, the voltage of the second specific point is fed back to the regulating circuit; when the switch control circuit controls the third switching element to conduct the connection between the third specific point and the feedback voltage input end, the voltage of the third specific point is fed back to the regulating circuit.
In an embodiment of the present invention, the display device may include a host, a main flexible circuit board, and a display panel;
the first specific point may be in the host, the second specific point may be in the main flexible circuit board, and the third specific point may be in the display panel, but not limited thereto.
The invention also provides a display device which comprises the adjusting module.
Optionally, the display device includes a power management integrated circuit and a display panel, and the display panel includes a pixel circuit; the power management integrated circuit outputs power supply voltage to the pixel circuit through a power supply voltage output end;
the adjusting circuit that the adjusting module includes sets up in power management integrated circuit.
The display device provided by the embodiment of the invention can be any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. A regulating module is applied to a display device, the display device comprises a power management integrated circuit and a display panel, and the display panel comprises a pixel circuit; the power management integrated circuit outputs power supply voltage to the pixel circuit through a power supply voltage output end; the device is characterized in that the adjusting module comprises a feedback circuit and an adjusting circuit;
the feedback circuit is used for feeding back the voltage of a specific point on the power supply voltage output line to the regulating circuit; the power supply voltage output line is a connecting line between the power supply voltage output end and the pixel circuit; the voltage of a specific point on the power supply voltage output line is a feedback voltage;
the regulating circuit is used for receiving the feedback voltage through a feedback voltage input end and regulating the power supply voltage output by the power supply management integrated circuit through the power supply voltage output end according to the feedback voltage;
the feedback circuit comprises a switch control circuit, a first switch element, a second switch element and a third switch element; the specific points comprise a first specific point, a second specific point and a third specific point;
a control terminal of the first switching element is electrically connected to the switching control circuit, a first terminal of the first switching element is electrically connected to a first specific point, and a second terminal of the first switching element is electrically connected to the feedback voltage input terminal;
a control terminal of the second switching element is electrically connected to the switching control circuit, a first terminal of the second switching element is electrically connected to a second specific point, and a second terminal of the second switching element is electrically connected to the feedback voltage input terminal;
a control terminal of the third switching element is electrically connected to the switch control circuit, a first terminal of the third switching element is electrically connected to a third specific point, and a second terminal of the third switching element is electrically connected to the feedback voltage input terminal;
the switch control circuit is configured to control a first switch control signal to be provided to the control terminal of the first switch element, a second switch control signal to be provided to the control terminal of the second switch element, and a third switch control signal to be provided to the control terminal of the third switch element, so as to control the voltage at the first specific point, the voltage at the second specific point, or the voltage at the third specific point to be fed back to the feedback voltage input terminal.
2. The conditioning module of claim 1 wherein the display device comprises a host; the power management integrated circuit is arranged in the host;
the specific point is within the host.
3. The regulation module of claim 2 wherein the feedback circuit comprises a first feedback resistor having a resistance of 0 ohms;
a first end of the first feedback resistor is electrically connected to the specific point, and a second end of the first feedback resistor is electrically connected to the feedback voltage input terminal.
4. The conditioning module of claim 1, wherein the display device comprises a main flexible circuit board;
the specific point is within the main flexible circuit board.
5. The regulation module of claim 4 wherein the feedback circuit includes a second feedback resistor having a resistance value of 0 ohms;
a first end of the second feedback resistor is electrically connected to the specific point, and a second end of the second feedback resistor is electrically connected to the feedback voltage input terminal.
6. The adjustment module of claim 1, wherein the specific point is within the display panel.
7. The regulation module of claim 6 wherein the feedback circuit includes a third feedback resistor having a resistance value of 0 ohms;
a first end of the third feedback resistor is electrically connected to the specific point, and a second end of the third feedback resistor is electrically connected to the feedback voltage input terminal.
8. The conditioning module of any of claims 1 to 7, wherein the conditioning circuit is disposed in the power management integrated circuit.
9. A testing method applied to the conditioning module of any one of claims 1 to 8, wherein the testing method comprises:
selecting a specific point on the power supply voltage output line;
the feedback circuit feeds the voltage of the specific point back to a feedback voltage input end of the regulating circuit;
the regulating circuit regulates the power supply voltage output by the power supply management integrated circuit according to the voltage;
the feedback circuit comprises a switch control circuit, a first switch element, a second switch element and a third switch element; a control terminal of the first switching element is electrically connected to the switching control circuit, a first terminal of the first switching element is electrically connected to a first specific point, and a second terminal of the first switching element is electrically connected to the feedback voltage input terminal; a control terminal of the second switching element is electrically connected to the switching control circuit, a first terminal of the second switching element is electrically connected to a second specific point, and a second terminal of the second switching element is electrically connected to the feedback voltage input terminal; a control terminal of the third switching element is electrically connected to the switch control circuit, a first terminal of the third switching element is electrically connected to a third specific point, and a second terminal of the third switching element is electrically connected to the feedback voltage input terminal;
the test method comprises the following steps:
selecting a first specific point, a second specific point and a third specific point on a power supply voltage output line;
the switch control circuit controls the first switch element, the second switch element or the third switch element to be conducted so as to control feedback voltage to the feedback voltage input end; the feedback voltage is the voltage of a first specific point, the voltage of a second specific point or the voltage of a third specific point;
and the regulating circuit regulates the power supply voltage output by the power supply management integrated circuit according to the feedback voltage.
10. The test method of claim 9, wherein the display device comprises a host, a main flexible circuit board, and a display panel;
the specific point is within the host, the main flexible circuit board, or the display panel.
11. The test method of claim 9, wherein the display device comprises a host, a main flexible circuit board, and a display panel;
the first specific point is within the host, the second specific point is within the main flexible circuit board, and the third specific point is within the display panel.
12. A display device, comprising the adjustment module of any one of claims 1 to 8.
13. The display device of claim 12, wherein the display device comprises a power management integrated circuit and a display panel, the display panel comprising pixel circuits; the power management integrated circuit outputs power supply voltage to the pixel circuit through a power supply voltage output end;
the adjusting circuit that the adjusting module includes sets up in power management integrated circuit.
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| CN105047133A (en) * | 2015-08-07 | 2015-11-11 | 深圳市华星光电技术有限公司 | Organic light emitting diode displayer |
| CN105931600A (en) * | 2016-07-08 | 2016-09-07 | 京东方科技集团股份有限公司 | AMOLED (active-matrix organic light emitting diode) display device and compensation method thereof |
| CN106297665B (en) * | 2016-10-31 | 2018-12-07 | 昆山国显光电有限公司 | A kind of system and method compensating the internal electric source pressure drop of AMOLED display panel |
| CN109119022A (en) * | 2018-09-12 | 2019-01-01 | 武汉天马微电子有限公司 | Luminance compensation unit and method of OLED (organic light emitting diode) pixel, display panel and device |
| CN109243374A (en) * | 2018-11-29 | 2019-01-18 | 昆山国显光电有限公司 | The voltage-drop compensation system and method for display panel internal electric source |
| CN110718577B (en) * | 2019-10-23 | 2022-11-15 | 武汉天马微电子有限公司 | Display module and display device |
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