CN111402813A - Display module and electronic equipment - Google Patents

Display module and electronic equipment Download PDF

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Publication number
CN111402813A
CN111402813A CN202010344399.0A CN202010344399A CN111402813A CN 111402813 A CN111402813 A CN 111402813A CN 202010344399 A CN202010344399 A CN 202010344399A CN 111402813 A CN111402813 A CN 111402813A
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switch
emitting unit
display module
pin
light
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CN202010344399.0A
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CN111402813B (en
Inventor
马伟欣
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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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
    • 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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The embodiment of the invention provides a display module and electronic equipment, wherein the display module comprises: display screen and driver chip, wherein: the display screen comprises a first light-emitting unit and a second light-emitting unit, and the driving chip comprises a first pin and a second pin; the first pin is connected with the first light-emitting unit through a first switch, the second pin is connected with the first light-emitting unit through a second switch, and the second pin is also connected with the second light-emitting unit through a third switch; in a first working state of the display module, the first pin is conducted to the first light-emitting unit, and the second pin is conducted to the second light-emitting unit; or, in a second working state of the display module, the second pin is alternately conducted to the first light-emitting unit and the second light-emitting unit. The embodiment of the invention can improve the display effect of the display module.

Description

Display module and electronic equipment
Technical Field
The invention relates to the technical field of communication, in particular to a display module and electronic equipment.
Background
As is known, the light emitting unit of the display module needs to have sufficient charging time to meet the working requirement, and the charging time of the light emitting unit is mainly affected by the resolution and refresh frequency of the display screen and the number of PINs (hereinafter referred to as PINs) of the light emitting driving chip (hereinafter referred to as driving IC).
With the development of communication technology, people have higher and higher performance requirements on electronic equipment, and the refresh frequency of a display screen is also increased continuously, for example, for some electronic equipment, a display module can work at a common refresh frequency of 60Hz, and can also work at refresh frequencies of 90Hz, 120Hz or even higher. However, the number of PINs of the driving IC in the display module is usually less than the number of light emitting units of the display module, and particularly, one PIN outputs signals capable of being used for charging to a plurality of light emitting units at different times, so that when the display module operates at a high frequency (e.g., 90Hz, 120Hz, or even higher), the charging time of the power generating unit is short, and the display module may not be charged sufficiently, which may cause abnormal display. Therefore, the display effect of the current display module is poor.
Disclosure of Invention
The embodiment of the invention provides a display module and electronic equipment, and aims to solve the problem that the display effect of the existing display module is poor.
In a first aspect, an embodiment of the present invention provides a display module, including: display screen and driver chip, wherein:
the display screen comprises a first light-emitting unit and a second light-emitting unit, and the driving chip comprises a first pin and a second pin;
the first pin is connected with the first light-emitting unit through a first switch, the second pin is connected with the first light-emitting unit through a second switch, and the second pin is further connected with the second light-emitting unit through a third switch;
in a first working state of the display module, the first switch is turned on, the second switch is turned off, the first pin is connected to the first light-emitting unit, and the second pin is connected to the second light-emitting unit; or, in a second working state of the display module, the first switch is turned off, and the second pin is alternately turned on to the first light-emitting unit and the second light-emitting unit.
In a second aspect, an embodiment of the present invention further provides an electronic device, including the display module described above.
In the embodiment of the invention, the light-emitting unit of the display screen and the pin of the driving chip are connected through the switch, so that the display module can work in a first working state or a second working state, in the first working state, the first pin and the second pin of the driving chip are respectively conducted to the first light-emitting unit and the second light-emitting unit of the display screen, and in the second working state, the second pin can be alternatively conducted to the first light-emitting unit and the second light-emitting unit; on the one hand, the embodiment can realize the alternate charging of the first light-emitting unit and the second light-emitting unit based on the second pin under the condition that the charging time of the light-emitting units with lower refreshing frequency of the display module can meet the display requirement, and the power consumption of the driving chip is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a display module according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a display module according to an embodiment of the invention;
fig. 3 is a schematic diagram of an equivalent circuit of the display module in the first operating state according to the embodiment of the invention;
fig. 4 is a schematic diagram of an equivalent circuit of the display module in a second operating state according to the embodiment of the invention;
fig. 5 is a schematic structural diagram of a display module according to an embodiment of the present invention.
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 some, not all, embodiments of the present invention. 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.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Referring to fig. 1, fig. 1 is a display module provided in an embodiment of the present invention, including: display screen 100 and driver chip 200, wherein:
the display screen 100 comprises a first light-emitting unit 101 and a second light-emitting unit 102, and the driving chip 200 comprises a first pin 201 and a second pin 202;
the first pin 201 is connected to the first light emitting unit 101 through a first switch 301, the second pin 202 is connected to the first light emitting unit 101 through a second switch 302, and the second pin 202 is further connected to the second light emitting unit 102 through a third switch 401;
in a first working state of the display module, the first switch 301 is turned on, the second switch 302 is turned off, the first pin 201 is connected to the first light emitting unit 101, and the second pin 202 is connected to the second light emitting unit 102; or, in a second working state of the display module, the first switch 301 is turned off, and the second pin 202 is alternately turned on to the first light emitting unit 101 and the second light emitting unit 102.
When the pin of the driving chip 200 is in conduction with the light emitting unit, the pin may output a signal to the light emitting unit, where the output signal may be generally referred to as a resource signal (Source signal), and may be used to charge the light emitting unit to achieve driving of light emission of the light emitting unit; in a refresh cycle of the display module, the time for conduction between the pin and the light emitting unit can be considered as the charging time of the light emitting unit. In this embodiment, the display module may operate in the first operating state or the second operating state.
In the second working state of the display module, it mainly means that the second pin 202 can be alternatively conducted to the first light emitting unit 101 and the second light emitting unit 102, that is, in one refresh period of the display module, the second pin 202 needs to be conducted to different light emitting units at different times, for example, the first switch 301 can be turned off, and the second switch 302 and the third switch 401 can be alternately turned on. Since each pin needs to be turned on to different light emitting cells at different times of one refresh period, the charging time of a single light emitting cell is a ratio of the refresh period to the number of light emitting cells corresponding to each pin. When the display module works at a lower refresh frequency, the refresh period is longer, and at the moment, the display module can generally ensure that each light-emitting unit has enough charging time to meet normal display in a second working state.
In the first working state of the display module, the first pin 201 is connected to the first light emitting unit 101, and the second pin 202 is connected to the second light emitting unit 102, that is, different light emitting units can be connected to different pins, for example, the first switch 301 and the third switch 401 can be closed, and the second switch 302 can be opened, so that the charging time of each light emitting unit can be equal to the refresh period in one refresh period. When the working refresh frequency of the display module is increased, the refresh period is correspondingly reduced, and if the display module is kept in the second working state, each light-emitting unit is likely to display abnormal due to too short charging time; and if the display module is switched to the first working state at the moment, different light-emitting units are conducted to different pins, so that the charging time loss of the light-emitting units caused by the increase of the refreshing frequency of the display module can be effectively compensated.
Of course, it should be emphasized that the selection of the display module in the first operating state or the second operating state is not necessarily related to the refresh frequency of the display module; for example, when the display module operates at a lower refresh frequency, the display module can be in the first operating state to ensure that each light-emitting unit has sufficient charging time to satisfy normal display.
In the embodiment of the invention, the light-emitting unit of the display screen and the pin of the driving chip are connected through the switch, so that the display module can work in a first working state or a second working state, in the first working state, the first pin and the second pin of the driving chip are respectively conducted to the first light-emitting unit and the second light-emitting unit of the display screen, and in the second working state, the second pin can be alternatively conducted to the first light-emitting unit and the second light-emitting unit; on the one hand, the embodiment can realize the alternate charging of the first light-emitting unit and the second light-emitting unit based on the second pin under the condition that the charging time of the light-emitting units with lower refreshing frequency of the display module can meet the display requirement, and the power consumption of the driving chip is reduced.
In an example, the display screen 100 may be an active matrix Organic light Emitting Diode (active matrix/Organic L light Emitting Diode, AMO L ED), and optionally, the display screen 100 may also be a liquid crystal display panel (L light Emitting Diode, L ED), and the like, which may be selected according to actual needs.
Optionally, to facilitate the display module to switch between the first operating state and the second operating state, as shown in fig. 2, in this embodiment, the first pin 201 is connected to a first end of a first switch 301, a second end of the first switch 301 is connected to a first end of a fourth switch 402, and a second end of the fourth switch 402 is connected to the first light emitting unit 101;
the second pin 202 is connected to a first end of the third switch 401, a second end of the third switch 401 is connected to the second light emitting unit 102, the second pin 202 is further connected to a first end of the second switch 302, and a second end of the second switch 302 is connected to a first end of the fourth switch 402.
In other words, the display module may include an enable switch 300 and a data selector 400, wherein the first switch 301 and the second switch 302 are part of the enable switch 300, and the third switch 401 and the fourth switch 402 are part of the data selector 400.
The data selector 400 may also be referred to as a multiplexer (Demux), and is mainly used for shunting the output signal of the second pin 202 in the second operating state of the display module, so that the first light emitting unit 101 and the second light emitting unit 102 can be charged based on the output signal of the second pin 202. It is understood that the output signal of the second pin 202 can be divided into two paths by the data selector 400, or can be divided into three paths or more, and the selection is performed according to the number of the first light-emitting units 101. For the sake of illustration, the splitting of the output signal of any one pin into N paths can be represented as Demux1: N, where N is an integer greater than 1. Of course, when the display module is in the first operating state, the third switch 401 and the fourth switch 402 of the data selector 400 may be in a constantly closed state, and there is no need to split the output signals of the pins of the driving chip 200, and in this case, the state may be recorded as Demux1: 1.
The enabling switch 300 is mainly used for adjusting the connection relationship between each light emitting unit and each pin, for example, in a first working state of the display module, the first switch 301 may be closed, the second switch 302 may be opened, the first pin 201 may be connected to the first light emitting unit 101, and the second pin 202 may be connected to the second light emitting unit 102; in the second working state, the display module can turn off the first switch 301 and turn on the second switch 302 to turn off the first pin 201 and each of the light-emitting units, and turn on the corresponding light-emitting units alternately through the second pin 202.
Compared with the previous embodiment, the fourth switch 402 is added in the present embodiment, so that the second switch 302 can only be used to adjust the connection relationship between each light emitting unit and each pin, and does not need to function as an output signal shunt.
Optionally, in a first working state of the display module, the first switch 301, the third switch 401, and the fourth switch 402 are closed, and the second switch 302 is opened;
in a second working state of the display module, the first switch 301 is turned off, the second switch 302 is turned on, and the third switch 401 and the fourth switch 402 are alternately turned on.
Referring to fig. 3, fig. 3 shows an equivalent circuit of the display module in the first working state, at this time, the first switch 301 in the enable switch 300 is closed, the second switch 302 is opened, and thus the first pin 201 is equivalently turned on with the first light emitting unit 101 through the fourth switch 402, and the second pin 202 is equivalently turned on with the second light emitting unit 102 through the third switch 401. At this time, the data selector 400 may be in an operating state of Demux1:1, that is, the third switch 401 and the fourth switch 402 may both be in a closed state, so that the first pin 201 of the driver chip 200 can output the resource signal to the first light emitting unit 101, and the second pin 202 of the driver chip 200 can output the resource signal to the second light emitting unit 102.
Referring to fig. 4, fig. 4 shows an equivalent circuit of the display module in the second working state, at this time, the first switch 301 in the enable switch 300 is opened, the second switch 302 is closed, so that the first pin 201 and each light emitting unit are equivalently disconnected from each other, and the second pin 202 is connected to the first light emitting unit 101 through the fourth switch 402 and connected to the second light emitting unit 102 through the third switch 401. At this time, the data selector 400 may be in an operating state of Demux1:2, that is, the third switch 401 and the fourth switch 402 are alternately closed, and the second pin 202 can alternately output the resource signal to the first light emitting unit 101 and the second light emitting unit 102.
Therefore, in the embodiment, the display module can be switched between the first working state and the second working state by adjusting the on/off of each switch included in the enable switch and the data selector.
Optionally, the number of the first light emitting unit 101, the first pin 201, the first switch 301, and the fourth switch 402 is multiple; wherein,
the plurality of first pins 201 are respectively connected to first ends of the plurality of first switches 301, second ends of the plurality of first switches 301 are respectively connected to first ends of the plurality of fourth switches 402, and second ends of the plurality of fourth switches 402 are respectively connected to the plurality of first light emitting units 101.
It is easy to understand that the display panel 100 generally includes a plurality of pixel circuits, each first light-emitting unit 101 may correspond to a portion of the pixel circuit, and the connection relationship between any two first light-emitting units 101 in the display panel 100 may be the same; therefore, the first pin 201, the first switch 301, and the fourth switch 402 may be provided for each of the first light emitting units 101. This helps to provide a sufficient number of first light-emitting units 101 in the display screen 100 to meet the requirement of resolution size.
Optionally, the control terminals of a plurality of the first switches 301 are connected to the same enable terminal; and/or the control terminals of a plurality of the fourth switches 402 are connected to the same enable terminal.
In general, when the display module is switched between the first operating state and the second operating state, the plurality of first switches 301 are synchronously opened or closed. The same is true for the fourth plurality of switches 402, with the difference that the state of the fourth plurality of switches 402 is also affected by the alternating on-process when the data selector 400 is in the Demux1: N operating state, but it is still normally open or closed synchronously.
Therefore, in this embodiment, the control terminals of the first switches 301 are connected to the same enable terminal, and/or the control terminals of the fourth switches 402 are connected to the same enable terminal, so that the number of enable terminals can be reduced while the normal operation of the display module is satisfied.
Optionally, the number of the second light emitting unit 102, the second pin 202, the second switch 302, and the third switch 401 is multiple; wherein,
the plurality of second pins 202 are respectively connected to first ends of the plurality of third switches 401, second ends of the plurality of third switches 401 are respectively connected to the plurality of second light emitting units 102, the plurality of second pins 202 are also respectively connected to first ends of the plurality of second switches 302, and second ends of the plurality of second switches 302 are respectively connected to first ends of the plurality of fourth switches 402.
Similar to the first light-emitting units 101, the number of the second light-emitting units 102 may also be multiple, and the connection relationship between any two second light-emitting units 102 in the display screen 100 may be the same; therefore, the second pin 202, the second switch 302, and the third switch 401 may be provided for each of the second light emitting units 102. This facilitates the arrangement of a sufficient number of second light-emitting units 102 in the display screen 100 to meet the requirement of resolution.
Optionally, the control terminals of a plurality of switches included in the plurality of second switches 302 are connected to the same enable terminal; and/or the control terminals of a plurality of switches included in the plurality of third switches 401 are connected to the same enable terminal.
Similar to the operation of the first switches 301 and the fourth switches 402, the second switches 302 are usually opened or closed synchronously, as are the third switches 401. Therefore, in this embodiment, the control terminals of the second switches 302 are connected to the same enable terminal, and/or the control terminals of the third switches 401 are connected to the same enable terminal, so that the number of enable terminals can be reduced while the normal operation of the display module is satisfied.
Optionally, the first switch 301 and the fourth switch 402 are both Thin Film Transistor (TFT) switches, wherein a control end of the first switch 301 and a control end of the fourth switch 402 are both gate electrodes, a first end of the first switch 301 and a first end of the fourth switch 402 are both source electrodes, and a second end of the first switch 301 and a second end of the fourth switch 402 are both drain electrodes.
In this embodiment, the first switch 301 and the fourth switch 402 are set as TFT switches, that is, each light emitting unit in the first light emitting unit 101 can be driven by a corresponding thin film transistor, so that the display module has high responsivity and good display effect.
Optionally, the second switch 302 and the third switch 401 are both TFT switches, where a control end of the second switch 302 and a control end of the third switch 401 are both gates, a first end of the second switch 302 and a first end of the third switch 401 are both sources, and a second end of the second switch 302 and a second end of the third switch 401 are both drains.
In this embodiment, the second switch 302 and the third switch 401 are set as TFT switches, and each light emitting unit in the second light emitting unit 102 can be driven by a corresponding thin film transistor, so that the responsivity and the display effect of the display module can be improved.
An application embodiment of the display module provided by the embodiment of the invention is described as follows:
referring to fig. 5, in the embodiment of the present application, the display module includes a display screen 100, a driving chip 200, an enable switch 300, and a data selector 400. The display module switches to work under at least two refresh frequencies, for example, the display module can work at a lower refresh frequency of 60Hz, and also can work at a higher refresh frequency of 90Hz or 120Hz, and the like.
When the display module operates at a low refresh frequency of 60Hz, a Demux1:2 mode may be adopted, that is, each pin may be alternatively conducted to the first light-emitting unit and the second light-emitting unit, where the first light-emitting unit and the second light-emitting unit may be light-emitting units respectively located in two rows of different display screens 100, so as to save the number of pins required and further reduce the power consumption of the driver chip. The above-mentioned process of alternately turning on can be realized by the data selector 400.
Referring to fig. 5, the data selector 400 includes a first TFT switch and a second TFT switch, wherein the first TFT switch may be regarded as a plurality of TFT switches located on a single column of data lines in the figure and having gates connected to the enable terminals Mux 1; the second TFT switches may be considered as a plurality of TFT switches located on the even-numbered data lines in the figure, and having gates connected to the enable terminals Mux2, and the above-mentioned alternate conduction process may be realized by time-sharing control of the enable terminals Mux1 and Mux 2.
Taking the display panel 100 as AMO L ED and the resolution as 1080 × 2400 as an example, when the Demux1:2 mode is adopted, since a single pin in the driving chip 200 needs to be alternately turned on to the light emitting cells in two different rows in one refresh cycle to charge the light emitting cells, the charging time of each row of light emitting cells is 1s/(60Hz × 2400 × 2) 3.5 μ s at this time, when the refresh frequency of the display module is increased to 90Hz, 120Hz or higher, if the Demux1:2 mode is still adopted, the charging time of each row of light emitting cells may be too short to ensure normal display, and therefore, the Demux1:1 mode may be adopted at this time, that is, each pin of the driving chip 200 is respectively turned on to a row of light emitting cells to ensure that each row of light emitting cells has enough charging time to meet the normal display requirement, and when the Demux1:1 mode is adopted, the first and the second TFT switches of the data selector 400 may be in a closed state all the time.
Switching between the two modes, Demux1:1 and Demux1:2, described above, also needs to be implemented in conjunction with enable switch 300. The enable switch 300 comprises a third TFT switch and a fourth TFT switch, and referring to fig. 5, the third TFT switch comprises a switch T11, a switch T12, a switch T13 and a switch T14, and the gate of the third TFT switch is connected to the enable terminal EN 2; the fourth TFT switch includes a switch T1, a switch T2, a switch T3 and a switch T4, and the gate of the fourth TFT switch is connected to the enable terminal EN 1. When the mode of Demux1:1 is adopted, the enable terminal EN1 turns off the fourth TFT switch, and the enable terminal EN2 turns on the third TFT switch; when the Demux1:2 mode is used, the enable terminal EN1 closes the fourth TFT switch and the enable terminal EN2 opens the third TFT switch.
Referring to fig. 5, in the two modes of Demux1:1 and Demux1:2, the on/off states of the switches included in the enable switch 300 are as follows:
T1 T2 T3 T4 T11 T12 T13 T14
Demux1:2 √ √ √ √ × × × ×
Demux1:1 × × × × √ √ √ √
wherein symbol "v" represents switch closure and symbol "×" represents switch opening.
Of course, in some possible embodiments, the display screen 100 may also be an L CD panel, and it is easy to understand that the display module can also operate in a Demux1: n mode by adjusting the display enable switch 300 and the data selector 400, where n is an integer greater than 2.
In the embodiment of the application, the display module can be switched between two modes, namely a Demux1:1 mode and a Demux1:2 mode, by controlling the enable switch and the data selector, and when the display module works at a higher refreshing frequency, the Demux1:1 mode can be adopted to ensure that the light-emitting unit has enough charging time to meet the normal display requirement; when the display module works at a lower refreshing frequency, a Demux1:2 mode can be adopted, so that the power consumption of the driving chip is reduced. Meanwhile, the compatibility of the display screen to the driving chip is improved by the application of different mode switching.
The embodiment of the invention also provides electronic equipment comprising the display module.
The electronic device may be a mobile phone, a notebook computer, a tablet computer, a wearable device, an electronic book reading device, an MP3 player, an electric toy, or other electronic products, which is not limited in the embodiments of the present invention.
In the electronic device in the embodiment of the present invention, because the display module described in each of the embodiments is adopted, on one hand, under the condition that the charging time of the light emitting units, such as the display module having a low refresh frequency, can meet the display requirement, the alternate charging of the first light emitting unit and the second light emitting unit can be realized based on the second pin, so as to reduce the power consumption of the driver chip, and on the other hand, when the display module has a high refresh frequency, the respective charging of the first light emitting unit and the second light emitting unit can be realized based on the first pin and the second pin, so as to ensure the charging time of each light emitting unit in a single refresh period, so that the display module can normally display, and improve the display effect of the display module.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A display module, comprising: display screen and driver chip, wherein:
the display screen comprises a first light-emitting unit and a second light-emitting unit, and the driving chip comprises a first pin and a second pin;
the first pin is connected with the first light-emitting unit through a first switch, the second pin is connected with the first light-emitting unit through a second switch, and the second pin is further connected with the second light-emitting unit through a third switch;
in a first working state of the display module, the first switch is turned on, the second switch is turned off, the first pin is connected to the first light-emitting unit, and the second pin is connected to the second light-emitting unit; or, in a second working state of the display module, the first switch is turned off, and the second pin is alternately turned on to the first light-emitting unit and the second light-emitting unit.
2. The display module as claimed in claim 1, wherein the first pin is connected to a first terminal of a first switch, a second terminal of the first switch is connected to a first terminal of a fourth switch, and a second terminal of the fourth switch is connected to the first light emitting unit;
the second pin is connected with a first end of the third switch, a second end of the third switch is connected with the second light-emitting unit, the second pin is further connected with a first end of the second switch, and a second end of the second switch is connected with a first end of the fourth switch.
3. The display module of claim 2, wherein in a first operating state of the display module, the first switch, the third switch, and the fourth switch are closed, and the second switch is open;
and in a second working state of the display module, the first switch is switched off, the second switch is switched on, and the third switch and the fourth switch are alternately switched on.
4. The display module of claim 2, wherein the number of the first light emitting unit, the first pin, the first switch, and the fourth switch is plural; wherein,
the plurality of first pins are respectively connected with first ends of the plurality of first switches, second ends of the plurality of first switches are respectively connected with first ends of the plurality of fourth switches, and second ends of the plurality of fourth switches are respectively connected with the plurality of first light-emitting units.
5. The display module as claimed in claim 2, wherein the control terminals of the first switches are connected to the same enable terminal; and/or
And the control ends of the plurality of fourth switches are connected with the same enabling end.
6. The display module according to claim 4, wherein the number of the second light emitting unit, the second pin, the second switch and the third switch is plural; wherein,
the plurality of second pins are respectively connected with first ends of the plurality of third switches, second ends of the plurality of third switches are respectively connected with the plurality of second light-emitting units, the plurality of second pins are also respectively connected with first ends of the plurality of second switches, and second ends of the plurality of second switches are respectively connected with first ends of the plurality of fourth switches.
7. The display module as claimed in claim 6, wherein the control terminals of the plurality of second switches are connected to the same enable terminal; and/or
And the control ends of the plurality of third switches are connected with the same enabling end.
8. The display module of claim 5, wherein the first switch and the fourth switch are both Thin Film Transistor (TFT) switches, wherein a control terminal of the first switch and a control terminal of the fourth switch are both gates, a first terminal of the first switch and a first terminal of the fourth switch are both sources, and a second terminal of the first switch and a second terminal of the fourth switch are both drains.
9. The display module of claim 7, wherein the second switch and the third switch are both TFT switches, wherein the control terminal of the second switch and the control terminal of the third switch are both gates, the first terminal of the second switch and the first terminal of the third switch are both sources, and the second terminal of the second switch and the second terminal of the third switch are both drains.
10. An electronic device, comprising the display module according to any one of claims 1 to 9.
CN202010344399.0A 2020-04-27 2020-04-27 Display module and electronic equipment Active CN111402813B (en)

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CN105469765A (en) * 2016-01-04 2016-04-06 武汉华星光电技术有限公司 Multiplexing-type display driving circuit
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