CN112053659A - Display panel, power supply method thereof and display device - Google Patents
Display panel, power supply method thereof and display device Download PDFInfo
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- CN112053659A CN112053659A CN202011027491.0A CN202011027491A CN112053659A CN 112053659 A CN112053659 A CN 112053659A CN 202011027491 A CN202011027491 A CN 202011027491A CN 112053659 A CN112053659 A CN 112053659A
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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]
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention relates to a display panel, a power supply method thereof and a display device. The display panel includes: the power supply circuit comprises a first group of power lines, a second group of power lines, a third group of power lines, a driving chip, a switch circuit and a light-emitting element; the driving chip comprises a power supply module; one end of the first group of power lines is electrically connected with the light-emitting element, and the other end of the first group of power lines is electrically connected with the switch circuit; one end of the second group of power lines is electrically connected with the power module, and the other end of the second group of power lines is electrically connected with the switch circuit; one end of the third group of power lines is electrically connected with the power supply equipment, and the other end of the third group of power lines is electrically connected with the switch circuit; the switch circuit outputs a first electric signal transmitted on the second group of power lines to the first group of power lines in the information screen display mode, and outputs a second electric signal transmitted on the third group of power lines to the first group of power lines in the normal display mode. According to the embodiment of the invention, the brightness of the display panel in the breath screen display mode in the debugging stage can be prevented from being different from the brightness of the display panel in the breath screen display mode in the whole machine stage.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a power supply method thereof and a display device.
Background
In the related art, an OLED (Organic Light-Emitting Diode) Display device generally has two operation modes, namely a Normal mode and an AOD mode. Here, the AOD mode is to reduce display power consumption of the display panel to the maximum, and thus, except for designating a display area for displaying designated display information (e.g., time, calendar, etc.), the remaining display area is turned off in the AOD mode. When the display panel is in the AOD mode, the luminance of the display screen is low as a whole and only a local display area is required for display, so that the current required for display of the display panel is small. When the display device enters the AOD mode, an external Power source (e.g., a Power Management IC (Power Management IC) or a PG (Pattern Generator)) is turned off, and Power is supplied to the display panel by a Power module inside the driver chip.
The PG is used as an external power supply to supply power in the debugging stage of the display panel, and the power management chip is used as the external power supply to supply power after the display device consisting of the display panel, the power management chip and other devices enters the whole machine stage.
However, the display brightness of the display panel in the AOD mode at the display panel debugging stage is different from the display brightness of the display panel in the AOD mode at the complete machine stage, which is not favorable for controlling the quality of the display panel.
Disclosure of Invention
The invention provides a display panel, a power supply method thereof and a display device, which aim to solve the defects in the related art.
According to a first aspect of embodiments of the present invention, there is provided a display panel including: the light-emitting device comprises a first group of power lines, a second group of power lines, a third group of power lines, a driving chip, a switch circuit and at least one light-emitting element; the driving chip comprises a power supply module;
one end of the first group of power lines is electrically connected with the light-emitting element, and the other end of the first group of power lines is electrically connected with the switch circuit; one end of the second group of power lines is electrically connected with the power module, and the other end of the second group of power lines is electrically connected with the switch circuit; one end of the third group of power lines is electrically connected with power supply equipment, and the other end of the third group of power lines is electrically connected with the switch circuit;
the switch circuit is configured to output a first electrical signal transmitted on the second set of power lines to the first set of power lines when the display panel is in a message display mode, and output a second electrical signal transmitted on the third set of power lines to the first set of power lines when the display panel is in a normal display mode; when the display panel is in the message screen display mode, a part of areas in the display area of the display panel are used for displaying images, the rest areas are in the screen-off state, and when the display panel is in the normal display mode, all areas in the display area are used for displaying images.
In one embodiment, the first group of power lines includes a first high-level power line and a first low-level power line, the second group of power lines includes a second high-level power line and a second low-level power line, and the third group of power lines includes a third high-level power line and a third low-level power line;
the switch circuit comprises a first high level input end, a first low level input end, a second high level input end, a second low level input end, a high level output end and a low level output end;
the light-emitting element comprises a first positive electrode and a first negative electrode; the power supply module comprises a second positive electrode and a second negative electrode; the power supply device comprises a third positive electrode and a third negative electrode;
the first electric signal comprises a first high level signal and a first low level signal, and the second electric signal comprises a second high level signal and a second low level signal;
one end of the first high-level power line is electrically connected with a first anode of the light-emitting element, the other end of the first high-level power line is electrically connected with a high-level output end of the switch circuit, one end of the first low-level power line is electrically connected with a first cathode of the light-emitting element, and the other end of the first low-level power line is electrically connected with a low-level output end of the switch circuit;
one end of the second high-level power line is electrically connected with the second anode of the power supply module, the other end of the second high-level power line is electrically connected with the first high-level input end of the switch circuit, one end of the second low-level power line is electrically connected with the second cathode of the power supply module, and the other end of the second low-level power line is electrically connected with the first low-level input end of the switch circuit; the second high-level power line is used for transmitting the first high-level signal, and the second low-level power line is used for transmitting the first low-level signal;
one end of the third high-level power line is electrically connected with a third anode of the power supply equipment, the other end of the third high-level power line is electrically connected with a second high-level input end of the switch circuit, one end of the third low-level power line is electrically connected with a third cathode of the power supply equipment, and the other end of the third low-level power line is electrically connected with a second low-level input end of the switch circuit; the third high-level power line is used for transmitting the second high-level signal, and the third low-level power line is used for transmitting the second low-level signal;
when the display panel is in a screen display mode, the switch circuit is configured to output the first high-level signal transmitted on the second high-level power line to the first high-level power line and output the first low-level signal transmitted on the second low-level power line to the first low-level power line;
when the display panel is in a normal display mode, the switch circuit is configured to output the second high-level signal transmitted on the third high-level power line to the first high-level power line and output the second low-level signal transmitted on the third low-level power line to the first low-level power line.
In one embodiment, the switching circuit includes a first data selector and a second data selector;
the first data selector is configured to output the first high-level signal transmitted on the second high-level power line to the first high-level power line when the display panel is in a message screen display mode, and output the second high-level signal transmitted on the third high-level power line to the first high-level power line when the display panel is in a normal display mode;
the second data selector is configured to output the first low-level signal transmitted on the second low-level power line to the first low-level power line when the display panel is in a message screen display mode, and output the second low-level signal transmitted on the third low-level power line to the first low-level power line when the display panel is in a normal display mode.
In one embodiment, the first data selector includes a first input terminal, a second input terminal, a first control terminal and a first output terminal, the first input terminal is electrically connected to the first high-level input terminal, the second input terminal is electrically connected to the second high-level input terminal, the first control terminal is configured to receive a control signal, the control signal is used to indicate that the display panel is in an information screen display mode or in a normal display mode, and the first output terminal is electrically connected to the high-level output terminal;
the second data selector comprises a third input end, a fourth input end, a second control end and a second output end, the third input end is electrically connected with the first low level input end, the fourth input end is electrically connected with the second low level input end, the second control end is used for receiving the control signal, and the second output end is electrically connected with the low level output end;
the first control end is connected with the second control end in parallel.
In one embodiment, the first data selector comprises a first and gate, a second and gate, a first not gate and a first or gate;
one input end of the first and gate is a first input end of the first data selector, the other input end of the first and gate is electrically connected with an output end of the first not gate, an output end of the first and gate is electrically connected with one input end of the first or gate, an input end of the first not gate is electrically connected with one input end of the second and gate, an input end of the first not gate is a first control end of the first data selector, the other input end of the second and gate is a second input end of the first data selector, an output end of the second and gate is electrically connected with the other input end of the first or gate, and an output end of the first or gate is a first output end of the first data selector.
In one embodiment, the second data selector comprises a third and gate, a fourth and gate, a second not gate, and a second or gate;
one input end of the third and gate is a third input end of the second data selector, the other input end of the third and gate is electrically connected with an output end of the second not gate, an output end of the third and gate is electrically connected with one input end of the second or gate, an input end of the second not gate is electrically connected with one input end of the fourth and gate, an input end of the second not gate is a second control end of the second data selector, the other input end of the fourth and gate is a fourth input end of the second data selector, an output end of the fourth and gate is electrically connected with the other input end of the second or gate, and an output end of the second or gate is a second output end of the second data selector.
In one embodiment, the switching circuit includes a first single pole double throw switch and a second single pole double throw switch;
the first single-pole double-throw switch comprises a first fixed end and a first movable end, the first fixed end is electrically connected with the first high-level power line, the first movable end is configured to be electrically connected with the second high-level power line when the display panel is in a screen display mode, and is electrically connected with the third high-level power line when the display panel is in a normal display mode;
the second single-pole double-throw switch comprises a second fixed end and a second movable end, the second fixed end is electrically connected with the first low-level power line, the second movable end is configured to be electrically connected with the second low-level power line when the display panel is in a message screen display mode, and is electrically connected with the third low-level power line when the display panel is in a normal display mode.
In one embodiment, the power supply device is a power management chip (PMIC) or a graphics generator (PG).
According to a second aspect of the embodiments of the present invention, there is provided a power supply method for a display panel, which is applied to the display panel, the method including:
when the display panel is in a message screen display mode, outputting a first electric signal transmitted on the second group of power lines to the first group of power lines;
when the display panel is in a normal display mode, outputting a second electric signal transmitted on the third group of power lines to the first group of power lines; when the display panel is in the message screen display mode, a part of areas in the display area of the display panel are used for displaying images, the rest areas are in the screen-off state, and when the display panel is in the normal display mode, all areas in the display area are used for displaying images.
According to a third aspect of embodiments of the present invention, there is provided a display apparatus including the power supply device and the display panel described above.
According to the above embodiment, since one end of the first group of power lines is electrically connected to the light emitting element and the other end is electrically connected to the switch circuit, one end of the second group of power lines is electrically connected to the power module and the other end is electrically connected to the switch circuit, one end of the third group of power lines is electrically connected to the power supply device and the other end is electrically connected to the switch circuit, and the switch circuit is configured to output the first electrical signal transmitted on the second group of power lines to the first group of power lines when the display panel is in the display mode of the display screen, and output the second electrical signal transmitted on the third group of power lines to the first group of power lines when the display panel is in the normal display mode, it is possible to prevent the power supply device from leaking electricity to affect the brightness of the light emitting element when the display panel is in the display mode of the display screen, and further prevent the, and the power supply difference caused by the load extraction of the power supply equipment can be effectively avoided. Moreover, the display brightness of the display panel in the information screen display mode in the debugging stage can be prevented from being different from the display brightness of the display panel in the information screen display mode in the whole machine stage, the reliability of the display panel is improved, and the quality of the display panel is controlled.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram illustrating another display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram illustrating another display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram illustrating another display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram illustrating another display panel according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating a power supply method of a display panel according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The embodiment of the invention provides a display panel. As shown in fig. 1, the display panel includes: a first group power supply line 11, a second group power supply line 12, a third group power supply line 13, a driving chip 14, a switching circuit 15, and at least one light emitting element 16; the driving chip 14 includes a power supply module 141.
As shown in fig. 1, one end of the first group power supply line 11 is electrically connected to the light emitting element 16, and the other end is electrically connected to the switching circuit 15; one end of the second group of power lines 12 is electrically connected to the power module 141, and the other end is electrically connected to the switch circuit 15; one end of the third group power supply line 13 is electrically connected to the power supply device 17, and the other end is electrically connected to the switch circuit 15.
In the present embodiment, the switch circuit 15 is configured to output the first electrical signal transmitted on the second group power line 12 to the first group power line 11 when the display panel is in the message display mode, and output the second electrical signal transmitted on the third group power line 13 to the first group power line 11 when the display panel is in the normal display mode. When the display panel is in the message screen display mode, part of the area in the display area of the display panel is used for displaying images, the rest of the area is in the screen-off state, and when the display panel is in the normal display mode, the whole area in the display area is used for displaying images.
In this embodiment, since one end of the first group of power lines is electrically connected to the light emitting element and the other end is electrically connected to the switch circuit, one end of the second group of power lines is electrically connected to the power module and the other end is electrically connected to the switch circuit, one end of the third group of power lines is electrically connected to the power supply device and the other end is electrically connected to the switch circuit, and the switch circuit is configured to output the first electrical signal transmitted on the second group of power lines to the first group of power lines when the display panel is in the message display mode and output the second electrical signal transmitted on the third group of power lines to the first group of power lines when the display panel is in the normal display mode, it is possible to prevent the power supply device from leaking electricity to affect the brightness of the light emitting element when the display panel is in the message display mode, and further prevent the power supply device from leaking electricity, and the power supply difference caused by the load extraction of the power supply equipment can be effectively avoided. Moreover, the display brightness of the display panel in the information screen display mode in the debugging stage can be prevented from being different from the display brightness of the display panel in the information screen display mode in the whole machine stage, the reliability of the display panel is improved, and the quality of the display panel is controlled.
The display panel provided by the embodiment of the present invention is briefly described above, and the display panel provided by the embodiment of the present invention is described in detail below.
The embodiment of the invention also provides a display panel. As shown in fig. 1, the display panel includes: a first group power supply line 11, a second group power supply line 12, a third group power supply line 13, a driving chip 14, a switching circuit 15, and at least one light emitting element 16; the driving chip 14 includes a power supply module 141. The switching circuit 15 may also be located on the driver chip 14.
In the present embodiment, the display panel may be an OLED display panel. As shown in fig. 2, the display area 21 of the OLED display panel includes a plurality of light emitting elements 16 arranged in an array. The light emitting element 16 may be an organic light emitting diode. When the display panel is in the message screen display mode, a part of the area in the display area 21 is used for displaying images, and the rest of the area is in a screen-off state. For example, a part of the designated area in the display area 21 is used for displaying information such as date and time, and the rest of the designated area is in the off-screen state, so that when a user needs to acquire information such as date and time, all the light emitting elements 16 in the display area 21 can be prevented from being turned on, and power consumption can be saved. While the entire area in the display area 21 is used for displaying images when the display panel is in the normal display mode. For example, all of the light-emitting elements 16 in the display area 21 may be lit.
Wherein power is supplied by the power supply device 17 when the display panel is in the normal display mode. When the display panel is not shipped from a factory, the power supply is performed by using the Pattern Generator (PG) as the power supply device 17 in the debugging stage of the display panel. After the display device composed of the display panel, the power management chip (PMIC) and other devices enters the whole device stage, the power management chip is used as the power supply device 17 to supply power. The power supply device 17 supplies a required current to the light emitting element 16 through a connector 23, an FPC (Flexible Printed Circuit) 22, and the driver chip 14. When the display panel is in the screen display mode, the power module 141 in the driving chip 14 supplies power to the light emitting elements 16.
If the switch circuit 15 is not arranged, in the debugging stage of the display panel, the leakage of electricity occurs in the Pattern Generator (PG), which affects the first display brightness when the display panel is in the message screen display mode, and in the complete machine stage, the second display brightness when the display panel is in the message screen display mode is probably different from the first display brightness, thus leading to inaccurate debugging result and probably causing poor display.
In the present embodiment, as shown in fig. 1, one end of the first group power supply line 11 is electrically connected to the light emitting element 16, and the other end is electrically connected to the switching circuit 15. One end of the second group power line 12 is electrically connected to the power module 141, and the other end is electrically connected to the switching circuit 15. One end of the third group power supply line 13 is electrically connected to the power supply device 17, and the other end is electrically connected to the switch circuit 15. The switch circuit 15 is configured to output the first electrical signal transmitted on the second group power line 12 to the first group power line 11 when the display panel is in the message display mode, to supply power to the light emitting element 16 by the power module 141 of the driving chip 14, and to output the second electrical signal transmitted on the third group power line 13 to the first group power line 11 when the display panel is in the normal display mode, to supply power to the light emitting element 16 by the power supply device 17.
In the present embodiment, as shown in fig. 1, the first group of power lines 11 includes a first high-level power line 111 and a first low-level power line 112, the second group of power lines 12 includes a second high-level power line 121 and a second low-level power line 122, and the third group of power lines 13 includes a third high-level power line 131 and a third low-level power line 132.
In the present embodiment, as shown in fig. 1, the switch circuit 15 includes a first high-level input terminal Ih1, a first low-level input terminal Il1, a second high-level input terminal Ih2, a second low-level input terminal Il2, a high-level output terminal Oh, and a low-level output terminal Ol.
In the present embodiment, as shown in fig. 1, the light emitting device 16 includes a first positive electrode P1 and a first negative electrode N1; the power supply module comprises a second positive electrode P2 and a second negative electrode N2; the power supply device includes a third positive electrode P3 and a third negative electrode N3.
In this embodiment, the first electrical signal includes a first high level signal and a first low level signal, and the second electrical signal includes a second high level signal and a second low level signal.
In the present embodiment, as shown in fig. 1, one end of the first high-level power line 111 is electrically connected to the first positive electrode P1 of the light emitting element 16, the other end is electrically connected to the high-level output terminal Oh of the switch circuit 15, one end of the first low-level power line 112 is electrically connected to the first negative electrode N1 of the light emitting element 16, and the other end is electrically connected to the low-level output terminal Ol of the switch circuit 15.
In the present embodiment, as shown in fig. 1, one end of the second high-level power line 121 is electrically connected to the second positive electrode P2 of the power module 141, the other end is electrically connected to the first high-level input terminal Ih1 of the switch circuit 15, one end of the second low-level power line 122 is electrically connected to the second negative electrode N2 of the power module 141, and the other end is electrically connected to the first low-level input terminal Il1 of the switch circuit 15; the second high-level power line 121 is used to transmit a first high-level signal of the first electrical signal, and the second low-level power line 122 is used to transmit a first low-level signal of the first electrical signal.
In the present embodiment, as shown in fig. 1, one end of the third high-level power line 131 is electrically connected to the third positive electrode P3 of the power supply device 17, the other end is electrically connected to the second high-level input terminal Ih2 of the switch circuit 15, one end of the third low-level power line 132 is electrically connected to the third negative electrode N3 of the power supply device 17, and the other end is electrically connected to the second low-level input terminal Il2 of the switch circuit 15; the third high-level power line 131 is used to transmit a second high-level signal of the second electrical signal, and the third low-level power line 132 is used to transmit a second low-level signal of the second electrical signal.
In the present embodiment, when the display panel is in the display mode, the switch circuit 15 is configured to output the first high-level signal transmitted on the second high-level power line 121 to the first high-level power line 111, and output the first low-level signal transmitted on the second low-level power line 122 to the first low-level power line 112.
In the present embodiment, when the display panel is in the normal display mode, the switch circuit 15 is configured to output the second high-level signal transmitted on the third high-level power line 131 to the first high-level power line 111, and output the second low-level signal transmitted on the third low-level power line 132 to the first low-level power line 112.
In the present embodiment, as shown in fig. 3, the switch circuit 15 includes a first data selector 151 and a second data selector 152.
In the present embodiment, the first data selector 151 is configured to output a first high level signal transmitted on the second high level power line 121 to the first high level power line 111 when the display panel is in the message display mode, and output a second high level signal transmitted on the third high level power line 131 to the first high level power line 111 when the display panel is in the normal display mode.
In the present embodiment, the second data selector 152 is configured to output the first low-level signal transmitted on the second low-level power line 122 to the first low-level power line 112 when the display panel is in the message display mode, and output the second low-level signal transmitted on the third low-level power line 132 to the first low-level power line 112 when the display panel is in the normal display mode.
In the present embodiment, as shown in fig. 3, the first data selector 151 includes a first input terminal I1, a second input terminal I2, a first control terminal C1, a first output terminal Out1, a first AND gate AND1, a second AND gate AND2, a first NOT gate NOT1, AND a first OR gate OR 1. One input terminal of the first AND gate AND1 is a first input terminal I1 of the first data selector 151, the other input terminal of the first AND gate AND1 is electrically connected to an output terminal of the first NOT gate NOT1, an output terminal of the first AND gate AND1 is electrically connected to one input terminal of the first OR gate OR1, an input terminal of the first NOT gate NOT1 is electrically connected to one input terminal of the second AND gate AND2, an input terminal of the first NOT gate NOT1 is a first control terminal C1 of the first data selector 151, the other input terminal of the second AND gate AND2 is a second input terminal I2 of the first data selector 151, an output terminal of the second AND gate 2 is electrically connected to the other input terminal of the first OR gate OR1, AND an output terminal of the first OR gate OR1 is a first output terminal Out1 of the first data selector 151.
In this embodiment, the first input terminal I1 of the first data selector 151 is electrically connected to the first high-level input terminal Ih1 of the switch circuit 15, the second input terminal I2 of the first data selector 151 is electrically connected to the second high-level input terminal Ih2 of the switch circuit 15, the first control terminal C1 is configured to receive a control signal, the control signal is used to indicate that the display panel is in the display mode of the display screen or in the normal display mode, and the first output terminal Out1 of the first data selector 151 is electrically connected to the high-level output terminal Oh of the switch circuit 15.
In the present embodiment, the logic expression of the first data selector 151 is
OUT1 is the signal output from the first output terminal OUT1, U _ ELVDD is the first high level signal, ELVDD is the second high level signal, and SW is the control signal.
In the present embodiment, as shown in fig. 3, the second data selector 152 includes a third input terminal I3, a fourth input terminal I4, a second control terminal C2, a second output terminal Out2, a third AND gate AND3, a fourth AND gate AND4, a second NOT gate NOT2, AND a second OR gate OR 2. One input terminal of the third AND-gate AND3 is the third input terminal I3 of the second data selector 152, the other input terminal of the third AND-gate AND3 is electrically connected to the output terminal of the second NOT-gate NOT2, the output terminal of the third AND-gate AND3 is electrically connected to one input terminal of the second OR-gate OR2, the input terminal of the second NOT-gate NOT2 is electrically connected to one input terminal of the fourth AND-gate AND4, the input terminal of the second NOT-gate NOT2 is the second control terminal C2 of the second data selector 152, the other input terminal of the fourth AND-gate AND4 is the fourth input terminal I4 of the second data selector 152, the output terminal of the fourth AND-gate 4 is electrically connected to the other input terminal of the second OR-gate OR2, AND the output terminal of the second OR-gate OR2 is the second output terminal Out2 of the second data selector 152.
In the present embodiment, the third input terminal I3 of the second data selector 152 is electrically connected to the first low level input terminal Il1 of the switch circuit 15, the fourth input terminal I4 of the second data selector 152 is electrically connected to the second low level input terminal Il2 of the switch circuit 15, the second control terminal C2 of the second data selector 152 is configured to receive a control signal, and the second output terminal Out2 of the second data selector 152 is electrically connected to the low level output terminal Ol of the switch circuit 15. The first control terminal C1 is connected in parallel with the second control terminal C2.
In the present embodiment, the logic expression of the second data selector 152 is
OUT2 is the signal output from the second output terminal OUT2, U _ ELVSS is the first low level signal, and ELVSS is the second low level signal.
In the present embodiment, the truth table of the switching circuit 15 is shown in table 1.
TABLE 1
In the present embodiment, when the control Signal (SW) is 1, the control signal is used to indicate that the display panel is in the normal display mode, the power supply device 17 supplies power to the light emitting element 16, the first output terminal Out1 outputs a second high level signal, and the second output terminal Out2 outputs a second low level signal.
In this embodiment, when the control Signal (SW) is 0, the control signal is used to indicate that the display panel is in the screen saver display mode, the power module 141 in the driver chip 14 supplies power to the light emitting element 16, the first output terminal Out1 outputs a first high level signal, and the second output terminal Out2 outputs a first low level signal.
In this embodiment, since one end of the first group of power lines is electrically connected to the light emitting element and the other end is electrically connected to the switch circuit, one end of the second group of power lines is electrically connected to the power module and the other end is electrically connected to the switch circuit, one end of the third group of power lines is electrically connected to the power supply device and the other end is electrically connected to the switch circuit, and the switch circuit is configured to output the first electrical signal transmitted on the second group of power lines to the first group of power lines when the display panel is in the message display mode and output the second electrical signal transmitted on the third group of power lines to the first group of power lines when the display panel is in the normal display mode, it is possible to prevent the power supply device from leaking electricity to affect the brightness of the light emitting element when the display panel is in the message display mode, and further prevent the power supply device from leaking electricity, and the power supply difference caused by the load extraction of the power supply equipment can be effectively avoided. Moreover, the display brightness of the display panel in the information screen display mode in the debugging stage can be prevented from being different from the display brightness of the display panel in the information screen display mode in the whole machine stage, the reliability of the display panel is improved, and the quality of the display panel is controlled.
Also, it is not necessary to update the Pattern Generator (PG) to solve the problem of the leakage, i.e., to update the power supply device, and therefore, the cost can be saved. I.e. without involving equipment updates and cost issues.
The embodiment of the invention also provides a display panel. Unlike the embodiment shown in fig. 1, in the present embodiment, as shown in fig. 4, the switch circuit 15 includes a first single-pole double-throw switch S1 and a second single-pole double-throw switch S2.
In the present embodiment, as shown in fig. 4, the first single-pole double-throw switch S1 includes a first stationary terminal G1 and a first movable terminal D1. The first stationary terminal G1 is electrically connected to the first high-level power line 111. The second single-pole double-throw switch S2 includes a second stationary terminal G2 and a second movable terminal D2, and the second stationary terminal G2 is electrically connected to the first low-level power line 112.
As shown in fig. 5, the first moving terminal D1 is configured to be electrically connected with the second high-level power line 121 when the display panel is in the message display mode, and the second moving terminal D2 is configured to be electrically connected with the second low-level power line 122 when the display panel is in the message display mode. The light emitting element 16 is powered by the power supply module 141 in the driver chip 14.
As shown in fig. 6, the first moving terminal D1 is configured to be electrically connected to the third high-level power line 131 when the display panel is in the normal display mode, and the second moving terminal D2 is configured to be electrically connected to the third low-level power line 132 when the display panel is in the normal display mode, so that the light emitting element 16 is powered by the power supply device 17.
In this embodiment, the switch circuit 15 may further include a control circuit for controlling the first moving terminal D1 and the second moving terminal D2 to control the operations of the first moving terminal D1 and the second moving terminal D2. For example, the control circuit may control the first moving terminal D1 to be electrically connected with the second high-level power line 121 or the third high-level power line 131 and the second moving terminal D2 to be electrically connected with the second low-level power line 122 or the third low-level power line 132 according to the received control signal.
In this embodiment, when the display panel is in the message screen display mode, the connection between the power supply device and the light emitting element is cut off, so as to avoid the influence on the brightness of the light emitting element due to the leakage of the power supply device when the display panel is in the message screen display mode, further avoid the influence on the display brightness of the display panel in the message screen display mode due to the leakage of the power supply device, and effectively avoid the power supply difference caused by the extraction and the loading of the power supply device. Moreover, the display brightness of the display panel in the breath screen display mode in the debugging stage can be prevented from being different from the display brightness of the display panel in the breath screen display mode in the whole machine stage, and the quality of the display panel can be controlled.
The embodiment of the invention also provides a power supply method of the display panel, which is applied to the display panel in any one of the embodiments. As shown in FIG. 7, the method comprises the following steps 701-702:
in step 701, when the display panel is in the message screen display mode, the first electrical signal transmitted on the second group of power lines is output to the first group of power lines. When the display panel is in the message screen display mode, part of the area in the display area of the display panel is used for displaying images, and the rest of the area is in a screen-off state.
In step 702, the second electrical signals transmitted on the third set of power lines are output to the first set of power lines when the display panel is in the normal display mode. The entire area in the display area is used for displaying images when the display panel is in the normal display mode.
In this embodiment, since one end of the first group of power lines is electrically connected to the light emitting element and the other end is electrically connected to the switch circuit, one end of the second group of power lines is electrically connected to the power module and the other end is electrically connected to the switch circuit, one end of the third group of power lines is electrically connected to the power supply device and the other end is electrically connected to the switch circuit, and the switch circuit is configured to output the first electrical signal transmitted on the second group of power lines to the first group of power lines when the display panel is in the message display mode and output the second electrical signal transmitted on the third group of power lines to the first group of power lines when the display panel is in the normal display mode, it is possible to prevent the power supply device from leaking electricity to affect the brightness of the light emitting element when the display panel is in the message display mode, and further prevent the power supply device from leaking electricity, and the power supply difference caused by the load extraction of the power supply equipment can be effectively avoided. Moreover, the display brightness of the display panel in the information screen display mode in the debugging stage can be prevented from being different from the display brightness of the display panel in the information screen display mode in the whole machine stage, the reliability of the display panel is improved, and the quality of the display panel is controlled. Furthermore, there is no equipment upgrade and cost issues involved.
The embodiment of the present invention further provides a display apparatus, which includes a power supply device 17, and further includes the display panel according to any of the above embodiments.
In this embodiment, the power supply device 17 is a PMIC.
In this embodiment, since one end of the first group of power lines is electrically connected to the light emitting element and the other end is electrically connected to the switch circuit, one end of the second group of power lines is electrically connected to the power module and the other end is electrically connected to the switch circuit, one end of the third group of power lines is electrically connected to the power supply device and the other end is electrically connected to the switch circuit, and the switch circuit is configured to output the first electrical signal transmitted on the second group of power lines to the first group of power lines when the display panel is in the message display mode and output the second electrical signal transmitted on the third group of power lines to the first group of power lines when the display panel is in the normal display mode, it is possible to prevent the power supply device from leaking electricity to affect the brightness of the light emitting element when the display panel is in the message display mode, and further prevent the power supply device from leaking electricity, and the power supply difference caused by the load extraction of the power supply equipment can be effectively avoided. Moreover, the display brightness of the display panel in the information screen display mode in the debugging stage can be prevented from being different from the display brightness of the display panel in the information screen display mode in the whole machine stage, the reliability of the display panel is improved, and the quality of the display panel is controlled. Furthermore, there is no equipment upgrade and cost issues involved.
The display device in this embodiment may be: any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator and the like.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.
In the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A display panel, comprising: the light-emitting device comprises a first group of power lines, a second group of power lines, a third group of power lines, a driving chip, a switch circuit and at least one light-emitting element; the driving chip comprises a power supply module;
one end of the first group of power lines is electrically connected with the light-emitting element, and the other end of the first group of power lines is electrically connected with the switch circuit; one end of the second group of power lines is electrically connected with the power module, and the other end of the second group of power lines is electrically connected with the switch circuit; one end of the third group of power lines is electrically connected with power supply equipment, and the other end of the third group of power lines is electrically connected with the switch circuit;
the switch circuit is configured to output a first electrical signal transmitted on the second set of power lines to the first set of power lines when the display panel is in a message display mode, and output a second electrical signal transmitted on the third set of power lines to the first set of power lines when the display panel is in a normal display mode; when the display panel is in the message screen display mode, a part of areas in the display area of the display panel are used for displaying images, the rest areas are in the screen-off state, and when the display panel is in the normal display mode, all areas in the display area are used for displaying images.
2. The display panel according to claim 1, wherein the first group of power lines includes a first high-level power line and a first low-level power line, the second group of power lines includes a second high-level power line and a second low-level power line, and the third group of power lines includes a third high-level power line and a third low-level power line;
the switch circuit comprises a first high level input end, a first low level input end, a second high level input end, a second low level input end, a high level output end and a low level output end;
the light-emitting element comprises a first positive electrode and a first negative electrode; the power supply module comprises a second positive electrode and a second negative electrode; the power supply device comprises a third positive electrode and a third negative electrode;
the first electric signal comprises a first high level signal and a first low level signal, and the second electric signal comprises a second high level signal and a second low level signal;
one end of the first high-level power line is electrically connected with a first anode of the light-emitting element, the other end of the first high-level power line is electrically connected with a high-level output end of the switch circuit, one end of the first low-level power line is electrically connected with a first cathode of the light-emitting element, and the other end of the first low-level power line is electrically connected with a low-level output end of the switch circuit;
one end of the second high-level power line is electrically connected with the second anode of the power supply module, the other end of the second high-level power line is electrically connected with the first high-level input end of the switch circuit, one end of the second low-level power line is electrically connected with the second cathode of the power supply module, and the other end of the second low-level power line is electrically connected with the first low-level input end of the switch circuit; the second high-level power line is used for transmitting the first high-level signal, and the second low-level power line is used for transmitting the first low-level signal;
one end of the third high-level power line is electrically connected with a third anode of the power supply equipment, the other end of the third high-level power line is electrically connected with a second high-level input end of the switch circuit, one end of the third low-level power line is electrically connected with a third cathode of the power supply equipment, and the other end of the third low-level power line is electrically connected with a second low-level input end of the switch circuit; the third high-level power line is used for transmitting the second high-level signal, and the third low-level power line is used for transmitting the second low-level signal;
when the display panel is in a screen display mode, the switch circuit is configured to output the first high-level signal transmitted on the second high-level power line to the first high-level power line and output the first low-level signal transmitted on the second low-level power line to the first low-level power line;
when the display panel is in a normal display mode, the switch circuit is configured to output the second high-level signal transmitted on the third high-level power line to the first high-level power line and output the second low-level signal transmitted on the third low-level power line to the first low-level power line.
3. The display panel according to claim 2, wherein the switch circuit includes a first data selector and a second data selector;
the first data selector is configured to output the first high-level signal transmitted on the second high-level power line to the first high-level power line when the display panel is in a message screen display mode, and output the second high-level signal transmitted on the third high-level power line to the first high-level power line when the display panel is in a normal display mode;
the second data selector is configured to output the first low-level signal transmitted on the second low-level power line to the first low-level power line when the display panel is in a message screen display mode, and output the second low-level signal transmitted on the third low-level power line to the first low-level power line when the display panel is in a normal display mode.
4. The display panel of claim 3, wherein the first data selector comprises a first input terminal, a second input terminal, a first control terminal and a first output terminal, the first input terminal is electrically connected to the first high-level input terminal, the second input terminal is electrically connected to the second high-level input terminal, the first control terminal is configured to receive a control signal, the control signal is configured to indicate that the display panel is in the message display mode or in the normal display mode, and the first output terminal is electrically connected to the high-level output terminal;
the second data selector comprises a third input end, a fourth input end, a second control end and a second output end, the third input end is electrically connected with the first low level input end, the fourth input end is electrically connected with the second low level input end, the second control end is used for receiving the control signal, and the second output end is electrically connected with the low level output end;
the first control end is connected with the second control end in parallel.
5. The display panel of claim 4, wherein the first data selector comprises a first AND gate, a second AND gate, a first NOT gate, and a first OR gate;
one input end of the first and gate is a first input end of the first data selector, the other input end of the first and gate is electrically connected with an output end of the first not gate, an output end of the first and gate is electrically connected with one input end of the first or gate, an input end of the first not gate is electrically connected with one input end of the second and gate, an input end of the first not gate is a first control end of the first data selector, the other input end of the second and gate is a second input end of the first data selector, an output end of the second and gate is electrically connected with the other input end of the first or gate, and an output end of the first or gate is a first output end of the first data selector.
6. The display panel of claim 4, wherein the second data selector comprises a third AND gate, a fourth AND gate, a second NOT gate, and a second OR gate;
one input end of the third and gate is a third input end of the second data selector, the other input end of the third and gate is electrically connected with an output end of the second not gate, an output end of the third and gate is electrically connected with one input end of the second or gate, an input end of the second not gate is electrically connected with one input end of the fourth and gate, an input end of the second not gate is a second control end of the second data selector, the other input end of the fourth and gate is a fourth input end of the second data selector, an output end of the fourth and gate is electrically connected with the other input end of the second or gate, and an output end of the second or gate is a second output end of the second data selector.
7. The display panel of claim 2, wherein the switch circuit comprises a first single pole double throw switch and a second single pole double throw switch;
the first single-pole double-throw switch comprises a first fixed end and a first movable end, the first fixed end is electrically connected with the first high-level power line, the first movable end is configured to be electrically connected with the second high-level power line when the display panel is in a screen display mode, and is electrically connected with the third high-level power line when the display panel is in a normal display mode;
the second single-pole double-throw switch comprises a second fixed end and a second movable end, the second fixed end is electrically connected with the first low-level power line, the second movable end is configured to be electrically connected with the second low-level power line when the display panel is in a message screen display mode, and is electrically connected with the third low-level power line when the display panel is in a normal display mode.
8. The display panel of claim 1, wherein the power supply device is a power management chip PMIC or a graphics generator PG.
9. A power supply method for a display panel, applied to the display panel according to any one of claims 1 to 8, the method comprising:
when the display panel is in a message screen display mode, outputting a first electric signal transmitted on the second group of power lines to the first group of power lines;
when the display panel is in a normal display mode, outputting a second electric signal transmitted on the third group of power lines to the first group of power lines; when the display panel is in the message screen display mode, a part of areas in the display area of the display panel are used for displaying images, the rest areas are in the screen-off state, and when the display panel is in the normal display mode, all areas in the display area are used for displaying images.
10. A display device characterized by comprising a power supply device and the display panel according to any one of claims 1 to 8.
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