CN115631724A - Display module, driving method thereof and display device - Google Patents

Display module, driving method thereof and display device Download PDF

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Publication number
CN115631724A
CN115631724A CN202211348794.1A CN202211348794A CN115631724A CN 115631724 A CN115631724 A CN 115631724A CN 202211348794 A CN202211348794 A CN 202211348794A CN 115631724 A CN115631724 A CN 115631724A
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Prior art keywords
display
chip
display panel
signal
nth
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CN202211348794.1A
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Chinese (zh)
Inventor
赖勐
陈强
钟晨
李家静
周井雄
夏志强
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Xiamen Tianma Display Technology Co Ltd
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Xiamen Tianma Display Technology Co Ltd
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Priority to CN202211348794.1A priority Critical patent/CN115631724A/en
Publication of CN115631724A publication Critical patent/CN115631724A/en
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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
    • 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

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

Abstract

The invention discloses a display module, a driving method thereof and a display device, wherein the display module comprises a display panel; the chip is electrically connected with the display panel and provides a first signal for the display panel; the adjusting module is electrically connected with the chip and sets the first signal to be the 1 st to the nth parameter values; the display panel comprises a screen-off state and a display state, n transition frames are further included between the screen-off state and the display state, the 1 st to nth parameter values are in one-to-one correspondence with the n transition frames, the 1 st to nth parameter values are sequentially transmitted to the display panel through the chip, the brightness of the 1 st transition frame is smaller than that of the nth transition frame, and the problem that the display panel is powered on abnormally when the screen-off state is changed to the display state is solved.

Description

Display module, driving method thereof and display device
Technical Field
The invention relates to the technical field of display, in particular to a display module, a driving method thereof and a display device.
Background
Currently, display technologies have penetrated various aspects of people's daily lives, and accordingly, more and more materials and technologies are used for display screens. Nowadays, liquid crystal display panels and Organic Light-Emitting display panels (OLEDs) are the main display panels in the mainstream.
Organic Light Emitting Diodes (OLEDs) are increasingly used in high performance displays as a current-mode light emitting device, and OLED display panels have many excellent characteristics such as self-luminescence, wide viewing angle, fast response speed, high contrast, wide color gamut, low energy consumption, thin panels, rich colors, flexible display, and wide operating temperature range, and are thus known as "star" flat panel display technologies of the next generation. The OLED display screen comprises an anode, a cathode, a hole transport layer, an organic light emitting layer and an electron transport layer, wherein the hole transport layer, the organic light emitting layer and the electron transport layer are arranged between the anode and the cathode, the anode provides hole injection, the cathode provides electron injection, holes and electrons injected by the cathode and the anode are compounded in the organic light emitting layer under the driving of an external voltage to form electron-hole pairs (namely excitons) at a bound energy level, and the excitons radiate and are de-excited to emit photons to generate visible light. However, in the display screen in the prior art, the abnormal picture occurs when the power is on again after the screen is turned off.
Therefore, it is desirable to provide a display module, a driving method thereof and a display device capable of improving abnormal images when a screen is powered on again.
Disclosure of Invention
In view of this, the present invention provides a display module, a driving method thereof, and a display device, so as to solve the problem of abnormal images when the display module is turned off and then powered on.
In one aspect, the present invention provides a display module, including:
a display panel;
the chip is electrically connected with the display panel and provides a first signal for the display panel;
the adjusting module is electrically connected with the chip and is used for setting a first signal to be a 1 st parameter value to an nth parameter value;
the display panel comprises a screen turning state and a display state, n transition frames are further included between the screen turning state and the display state, the 1 st to nth parameter values are in one-to-one correspondence with the n transition frames, the 1 st to nth parameter values are sequentially transmitted to the display panel through the chip, and the brightness of the 1 st transition frame is smaller than that of the nth transition frame.
On the other hand, the invention also provides a driving method of the display module, and the display module comprises the following steps: a display panel; the chip is electrically connected with the display panel and provides a first signal for the display panel; the adjusting module is electrically connected with the chip and is used for setting the first signal to be 1 st to nth parameter values;
the driving method includes:
the display panel is in a screen turning state, and the chip provides a second signal for the display panel;
the display panel enters a transition state, the transition state comprises n transition frames, in the transition frames from 1 st to nth, the adjusting module sets a first signal as the parameter values from 1 st to nth, the parameter values from 1 st to nth correspond to the transition frames one by one, the parameter values from 1 st to nth are transmitted to the display panel through the chip in sequence, and the brightness of the transition frame from 1 st is less than that of the transition frame from nth;
the display panel enters a display state, and the chip provides a third signal for the display panel.
Based on the same invention idea, the invention also provides a display device comprising the display module.
Compared with the prior art, the display module, the driving method thereof and the display device provided by the invention at least realize the following beneficial effects:
in the related art, all pixel circuits in a display panel need to be driven during display, a display driving chip has no external circuit, a power supply chip has an external circuit, the output states of the display driving chip and the power supply chip in no-load (i.e. a screen resting state) and mounting (a display state) are different, the display driving chip and the power supply chip suddenly load the driving circuit of the whole screen at the moment of power-on of the display panel, the instantaneous output load is extremely large and the state is unstable, so that the instability of driving time sequence voltage and pixel voltage can be caused, and the problem of instantaneous picture abnormity is caused. The invention is additionally provided with an adjusting module which is electrically connected with a chip, wherein a first signal provided by the chip is set as a 1 st parameter value to an nth parameter value in the adjusting module, the brightness of corresponding display panels is different, and the chip is in an idle state under the screen-on-screen state of the display panel; the method comprises the steps that 1 to nth transition frames are carried out before a display state is entered, namely, n gears are added to a display panel for transition before formal display, the display panel receives 1 to nth parameter values successively from the 1 st transition frame to the nth transition frame, the display panel gradually displays from the 1 st gear to the nth gear, the driving power required by the display panel of the 1 st transition frame is smaller than the driving power required by the display panel of the nth transition frame, the driving load of a chip of the 1 st transition frame is smaller than the driving load of a chip of the nth transition frame, the brightness of the 1 st transition frame is smaller than that of the nth transition frame, the brightness of the nth transition frame is close to that in the display state, the display panel achieves slow start by setting the transition frames, the load on the chip cannot suddenly increase to the load in the display state, and the load on the chip gradually increases to the load in the display state, so that abnormal phenomena of power-on pictures on the display panel are reduced.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic plan view of a display module according to the present invention;
FIG. 2 is a schematic diagram of a pixel circuit according to the present invention;
FIG. 3 is a diagram of different frames of a display module in a screen-off state, a transition frame and a display state;
FIG. 4 is a diagram of different frames of still another display module in a screen-off state, a transition frame and a display state;
FIG. 5 is a schematic plan view of another display module according to the present invention;
FIG. 6 is a schematic plan view of another display module according to the present invention;
FIG. 7 is a flowchart illustrating a driving method of a display module according to the present invention;
fig. 8 is a schematic plan view of a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The display panel with a 7T1C (7 transistors and 1 storage capacitor) pixel circuit has signals mainly from a display driving chip (DDIC) and a Power chip (Power IC) when displaying, all the pixel circuits in the display panel need to be driven during displaying, the display driving chip has no external circuit, the Power chip has an external circuit, the output states of no load (i.e. information screen state) and hanging (display state) of the display driving chip and the Power chip are different, the display driving chip and the Power chip suddenly load the driving circuit of the whole screen at the moment of Power-on of the display panel, the instantaneous output load is extremely large and unstable, so that the driving time sequence voltage and the pixel voltage are unstable, and the instantaneous image abnormity problem is caused.
In view of the above, the present invention provides a display module, a driving method thereof and a display device, so as to solve the problem of abnormal pictures when the display module is powered on again after screen turning.
Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic plane structure diagram of a display module according to the present invention, fig. 2 is a schematic structure diagram of a pixel circuit according to the present invention, fig. 3 is a diagram of different frames of a display module in a screen resting state, a transition frame and a display state, the number of the transition frames in fig. 3 is 5, and the display module 100 shown in fig. 1 includes: a display panel 10; a chip 200 electrically connected to the display panel 10 for providing a first signal to the display panel 10; the adjusting module 300 is electrically connected with the chip 200, and the first signal is set to the 1 st to nth parameter values in the adjusting module 300; the display panel 10 includes a screen-turning state and a display state, and n transition frames are included between the screen-turning state and the display state, the 1 st to nth parameter values are in one-to-one correspondence with the n transition frames, and the luminance of the 1 st transition frame is less than the luminance of the nth transition frame.
Specifically, the display panel 10 in the present invention may be an organic self-emitting display panel 10, where the display panel 10 includes a display area AA and a non-display area at least partially surrounding the display area AA, fig. 1 only schematically illustrates a case where the non-display area BB completely surrounds the display area AA, and certainly, the non-display area BB partially surrounds the display area AA, such as a water drop screen, and the like, which is not limited herein. The display area AA includes a plurality of sub-pixels 101 arranged in an array, the sub-pixels 101 include pixel driving circuits 102, pattern filling of the sub-pixels 101 is not performed in fig. 1, and only one kind of the pixel driving circuits 102 is shown in fig. 2, which is not taken as an actual circuit structure of the pixel driving circuits 102. The pixel drive circuit 000 in fig. 2 includes: an eighth transistor M1 having a gate electrically connected to the light-emitting signal input terminal, a first electrode electrically connected to the first power signal terminal VDD, and a second electrode electrically connected to the first electrode of the driving transistor M3; a second transistor M2 having a gate electrically connected to the second scanning signal input terminal S2, a first pole electrically connected to the data signal input terminal Vdata, and a second pole electrically connected to the first pole of the driving transistor M3; a driving transistor M3 having a gate electrically connected to the second pole of the fifth transistor M5 and a first pole electrically connected to the second pole of the eighth transistor M1 and the second pole of the second transistor M2; a fourth transistor M4 having a gate electrically connected to the second scan signal input terminal S2, a first pole electrically connected to the second pole of the fifth transistor M5 and the second pole of the storage capacitor Cst, and a second pole electrically connected to the second pole of the driving transistor M3 and the first pole of the sixth transistor M6; a fifth transistor M5 having a gate electrically connected to the first scan signal input terminal S1, a first pole electrically connected to the reference voltage signal input terminal Vref, and a second pole electrically connected to the gate of the driving transistor M3; a sixth transistor M6 having a gate electrically connected to the emission signal input terminal Emit, a first electrode electrically connected to the second electrode of the driving transistor M3 and the second electrode of the fourth transistor M4, and a second electrode electrically connected to the anode of the light emitting device O; a seventh transistor M7 having a gate electrically connected to the second scan signal input terminal, a first electrode electrically connected to the reference voltage signal input terminal, and a second electrode electrically connected to the first electrode of the light emitting device O; a first electrode of the storage capacitor Cst is electrically connected to the first power signal terminal, and a second electrode thereof is electrically connected to the gate electrode of the driving transistor M3, the first electrode of the fourth transistor M4, and the second electrode of the fifth transistor M5. The light emitting device O has a first pole electrically connected to the second pole of the sixth transistor M6 and the second pole of the seventh transistor M7, and a second pole electrically connected to the second power signal terminal VEE.
The chip 200 is electrically connected to the Display panel 10 to provide the Display panel 10 with electrical signals, and optionally, the chip 200 includes a Display driving chip 2001 and a power supply chip 2002, the Display driving chip 2001 (Display Driver IC, abbreviated as "DDIC") is one of the main control elements of the Display module 100, also called the "brain" of the Display module 100, and the main function is to send driving signals and data to the Display panel 10 in the form of electrical signals, so that image information such as letters and pictures can be displayed on the screen by controlling the brightness and color of the screen. In addition, the display driving chip 2001 may generate a voltage control signal, the voltage control signal is transmitted to the power supply chip 2002 through a line on the flexible circuit board 400, and the voltage control signal controls the power supply chip 2002 to generate a corresponding power supply voltage to be supplied to the display panel 10. In the present embodiment, the power chip 2002 is bound to the flexible circuit board 400, and in general, the power chip 2002 converts Alternating Current (AC) 220V commercial power into Direct Current (DC) 5V DC power by a series of means such as filtering, rectifying, pulse modulation, output rectifying, and filtering, and then stably outputs the DC power to the display panel 10.
In the present invention, the adjusting module 300 is additionally provided, the adjusting module 300 may be provided independently of the chip 200, or may be provided within the chip 200, and is not specifically limited herein, in this embodiment, it is schematically illustrated by only providing the adjusting module 300 independently of the chip 200, the adjusting module 300 is electrically connected to the chip 200, a first signal provided by the chip 200 in the adjusting module 300 is set as the 1 st to nth parameter values, all of the n parameter values are different, when the display panel 10 displays, n transition frames are further included between the screen saver state and the display state, the 1 st to nth parameter values correspond to the n transition frames one-to-one, the luminance of the 1 st transition frame is smaller than the luminance of the nth transition frame, only the transition frame is taken as 5 picture frames in fig. 3 for illustrative purposes, and the number of the transition frames is not specifically limited herein. In order to clearly show the difference between the screen-pause state and the transition frame and display state in the transition state, the respective states are set in the same drawing for illustration.
Compared with the prior art, the display module has the following beneficial effects:
in the related art, all pixel circuits in a display panel need to be driven during display, a display driving chip has no external circuit, a power chip has an external circuit, the output states of the display driving chip and the power chip in no-load (i.e., a breath screen state) and in mounting (a display state) are different, when the display panel is powered on, the display driving chip and the power chip suddenly load the driving circuit of the whole screen, and the instantaneous output load is extremely large and unstable, so that the driving time sequence voltage and the pixel voltage are unstable, and the instantaneous picture abnormity is caused. In the invention, the adjusting module 300 is additionally arranged, the adjusting module 300 is electrically connected with the chip 200, the adjusting module 300 sets a first signal provided by the chip 200 as the 1 st to nth parameter values, the brightness of the corresponding display panel 10 is different, and the chip 200 is in an idle state under the screen-saving state of the display panel 10; the display panel 10 enters a transition state before entering a display state, the transition state has 1 st to nth transition frames, that is, the display panel 10 increases n gears for transition before formal display, the display panel 10 receives 1 st to nth parameter values from the 1 st transition frame to the nth transition frame, the display panel 10 displays from the 1 st gear to the nth gear gradually, the driving power required by the display panel 10 of the 1 st transition frame is less than the driving power required by the display panel 10 of the nth transition frame, the driving load of the chip 200 during the 1 st transition frame is also less than the driving load of the chip 200 during the nth transition frame, the luminance of the 1 st transition frame is less than the luminance of the nth transition frame, the luminance of the nth transition frame is close to the luminance during the display state, the display panel 10 realizes slow start by setting the transition frames, the load on the chip 200 does not suddenly increase to the load in the display state, and the power-on picture of the display panel 10 is reduced.
It should be noted that, in the prior art, the chip only supports one output signal in the display state, and the provided signal does not support the transition frame multi-frame gradual change, so the adjusting module 300 is added in the present invention, so that the chip 200 can support the output signal required when the transition frame multi-frame gradual change occurs.
The luminance of the n transition frames also gradually transitions from low luminance to high luminance, so that the transition frames are visually hardly changed, and the normal display of the display panel 10 is not affected.
In some alternative embodiments, referring to fig. 4, fig. 4 is a different frame of a display module in a screen-off state, a transition frame and a display state, where the number of transition frames in fig. 4 is 7. The luminance of the 1 st transition frame to the luminance of the nth transition frame gradually increases.
Fig. 4 only uses transition frame 7 as an illustrative example, and the number of transition frames may also be other numbers, which is not limited in detail here. For example, the luminance of the 1 st transition frame may be 2nit, the luminance of the 2 nd transition frame may be 3nit, the luminance of the 3 rd transition frame may be 4nit, the luminance of the 4 th transition frame may be 5nit, the luminance of the 5 th transition frame may be 6nit, the luminance of the 6 th transition frame may be 7nit, and the luminance of the 7 th transition frame may be 8nit. The luminance in the display state is 10nit, so that the luminance gradually increases from the 1 st transition frame to the 5 th transition frame, and the 7 th transition frame is closer to the luminance in the display state.
In this embodiment, the adjusting module 300 is electrically connected to the chip 200, the adjusting module 300 sets the first signal provided by the chip 200 to the 1 st to nth parameter values, of course, the brightness of the corresponding display panel 10 is different, and the chip 200 is in an idle state when the display panel 10 is in an on screen state; the method includes the steps that a transition frame from 1 st to nth is carried out before a display state is entered, namely n gears are added to a display panel 10 for transition before formal display, from the transition frame from 1 st to nth, the display panel 10 receives parameter values from 1 st to nth one by one, the display panel 10 displays from the 1 st gear to the nth gear gradually, the driving power required by the display panel 10 is from low to high, at the moment, the driving load of a chip 200 is from low to high, the brightness of the display panel 10 is close to the brightness in the display state from low to high, through setting of the transition frame, the display panel 10 is started slowly, the load on the chip 200 cannot be suddenly increased to the display state, and therefore the phenomenon that an electric picture on the display panel 10 is abnormal is reduced.
In some optional embodiments, with continued reference to fig. 1, 3, and 4, the first signal includes at least one of a Gamma value, a gate driving circuit turn-on voltage VGH, a gate driving circuit turn-off voltage VGL, a high potential power supply voltage PVDD, a low potential power supply voltage PVEE, a high potential data signal VGSP, or a low potential data signal VGMP.
The first signal in the present invention may be a Gamma value, a gate driving circuit on voltage VGH, a gate driving circuit off voltage VGL, a high potential power supply voltage PVDD, a low potential power supply voltage PVEE, a high potential data signal VGSP, a low potential data signal VGMP, or a combination of two or more of a Gamma value, a gate driving circuit on voltage VGH, a gate driving circuit off voltage VGL, a high potential power supply voltage PVDD, a low potential power supply voltage PVEE, a high potential data signal VGSP, and a low potential data signal VGMP. Referring to fig. 5, fig. 5 is a schematic plane structure diagram of another display module 100 according to the present invention, in the display module 100 of fig. 5, a gate driving circuit VSR is disposed in a left frame BB1 and a right frame BB2, a gate driving circuit turn-on voltage VGH for controlling the gate driving circuit VSR to turn on is provided by the display driving chip 2001, a gate driving circuit turn-off voltage VGL for controlling the gate driving circuit VSR to turn off is also provided by the display driving chip 2001, a high potential power supply voltage PVDD and a low potential power supply voltage PVEE are provided by the power supply chip 2002, and a high potential data signal VGSP and a low potential data signal VGMP are provided by the display driving chip 2001.
The adjusting module 300 sets the first signal to be the 1 st to nth parameter values, sets the first signal to include any one of a Gamma value, a gate driving circuit start voltage VGH, a gate driving circuit stop voltage VGL, a high potential power supply voltage PVDD, a low potential power supply voltage PVEE, a high potential data signal VGSP, or a low potential data signal VGMP through a shift, the brightness of the corresponding display panel 10 is also different, and the chip 200 is in an idle state in the information screen state of the display panel 10; the method includes the steps that a transition frame from 1 st to nth is carried out before a display state is entered, namely n gears are added to a display panel 10 for transition before formal display, from the transition frame from 1 st to nth, the display panel 10 receives parameter values from 1 st to nth one by one, the display panel 10 displays from the 1 st gear to the nth gear gradually, the driving power required by the display panel 10 is from low to high, at the moment, the driving load of a chip 200 is from low to high, the brightness of the display panel 10 is close to the brightness in the display state from low to high, through setting of the transition frame, the display panel 10 is started slowly, the load on the chip 200 cannot be suddenly increased to the display state, and therefore the phenomenon that an electric picture on the display panel 10 is abnormal is reduced.
In some optional embodiments, with continued reference to fig. 1, 3, and 4, when the first signal includes a Gamma value, the Gamma value of the 1 st transition frame is greater than the Gamma value of the nth transition frame.
In the adjusting module 300, the first signal is set to the 1 st to nth parameter values, taking the first signal as the Gamma value as an example, the Gamma value of the display panel 10 in the display state is usually 2.2, the closer the Gamma value is to 2.2, the closer the transition frame is to the display state, so that the first signal can be divided into a plurality of steps, for example, 5 steps, and the 1 st to 5 th parameter values are respectively values between 2.4 and 2.2, so that the Gamma values of the 1 st to 5 th transition frames are gradually reduced, and the Gamma value is 2.2 in the display state, at this time, the driving load of the chip 200 is increased from low to high, the brightness of the display panel 10 is increased from low to high to approximate to the brightness in the display state, by setting the transition frame, the display panel 10 is started slowly, and the load on the chip 200 does not suddenly increase to the display state, thereby reducing the phenomenon of abnormal power-on the display panel 10.
In some optional embodiments, with continued reference to fig. 1, 3, and 4, when the first signal includes at least one of the gate driving circuit turn-on voltage VGH, the gate driving circuit turn-off voltage VGL, the high-potential power supply voltage PVDD, the low-potential power supply voltage PVEE, the high-potential data signal VGSP, or the low-potential data signal VGMP, the parameter value of the 1 st transition frame is smaller than the parameter value of the nth transition frame.
It is understood that the first signal includes at least one of the gate driving circuit on voltage VGH, the gate driving circuit off voltage VGL, the high potential power voltage PVDD, the low potential power voltage PVEE, the high potential data signal VGSP, and the low potential data signal VGMP, for example, a combination of the gate driving circuit on voltage VGH and the gate driving circuit off voltage VGL, a combination of the high potential power voltage PVDD and the low potential power voltage PVEE, a combination of the high potential data signal VGSP and the low potential data signal VGMP, a combination of the gate driving circuit on voltage VGH and the high potential power voltage PVDD, and so on, which are not limited specifically herein, and it is understood that these signals are all provided by the chip 200, and these signals are divided into different steps to be provided to the display panel 10, respectively, which can reduce the power-on load of the chip 200, and the load of the chip 200 can gradually transition from small to large.
In the adjusting module 300, the first signal is set as the parameter values from 1 st to nth, and taking the first signal as the gate driving circuit turn-on voltage as an example, the gate driving circuit turn-on voltage VGH of the 1 st transition frame is smaller than the gate driving circuit turn-on voltage VGH of the nth transition frame, and the gate driving circuit turn-on voltage VGH of the optional 1 st transition frame is gradually increased to the gate driving circuit turn-on voltage VGH of the nth transition frame, it can be understood that the lower the gate driving circuit turn-on voltage VGH is, the smaller the load of the chip 200 is, the higher the gate driving circuit turn-on voltage VGH is, the higher the load of the chip 200 is. Therefore, the gate driving circuit starting voltage can be divided into a plurality of gears, for example, 5 gears, and the 1 st to 5 th parameter values are gradually increased, so that the load on the chip 200 is gradually increased and approaches the gate driving circuit starting voltage VGH in the display state, at this time, the driving load on the chip 200 is from low to high, and the brightness of the display panel 10 approaches the brightness in the display state from low to high, by setting a transition frame, the display panel 10 realizes slow start, the load on the chip 200 cannot be suddenly increased to the display state, thereby reducing the abnormal phenomenon of the power-on picture on the display panel 10.
In some alternative embodiments, referring to fig. 5 in combination with fig. 3 and 4, fig. 5 is a schematic plane structure diagram of another display module provided by the present invention, the chip 200 includes a display driving chip 2001 and a power chip 2002, the display driving chip 2001 is electrically connected to the power chip 2002, the display driving chip 2001 provides a gate driving circuit turn-on voltage VGH, a gate driving circuit turn-off voltage VGL, a high-potential data signal VGSP, and a low-potential data signal VGMP, and the power chip 2002 provides a high-potential power voltage PVDD and a low-potential power voltage PVEE.
The display driving chip 2001 is electrically connected to the power supply chip 2002, the display driving chip 2001 may generate a voltage control signal, the voltage control signal is transmitted to the power supply chip 2002 through a line on the flexible circuit board 400, and the voltage control signal controls the power supply chip 2002 to generate a corresponding high potential power supply voltage PVDD and a corresponding low potential power supply voltage PVEE to be supplied to the display panel 10.
The gate driving circuit turn-on voltage VGH for controlling the gate driving circuit VSR to turn on is provided by the display driving chip 2001, and the gate driving circuit turn-off voltage VGL for controlling the gate driving circuit VSR to turn off is also provided by the display driving chip 2001, and the high potential power supply voltage PVDD and the low potential power supply voltage PVEE are provided by the power supply chip 2002, and the high potential data signal VGSP and the low potential data signal VGMP are provided by the display driving chip 2001.
In this embodiment, the display driving chip 2001 provides the gate driving circuit turn-on voltage VGH, the gate driving circuit turn-off voltage VGL, the high-level data signal VGSP and the low-level data signal VGMP, and sets the gate driving circuit turn-on voltage VGH, the gate driving circuit turn-off voltage VGL, the high-level data signal VGSP and the low-level data signal VGMP to n stages, if the adjustment module 300 sets the first signal to 1 st to nth parameter values, for example, 5 stages, and the 1 st to 5 th parameter values are gradually increased, so that the load on the display driving chip 2001 is gradually increased and approaches the voltage in the display state, at this time, the driving load of the display driving chip 2001 is increased from low to high, the luminance of the display panel 10 approaches the luminance in the display state from low to high, and the display panel 10 is slowly started by setting a transition frame, and the load on the display driving chip does not suddenly increase to the display state 2001, thereby reducing the abnormal phenomenon of the power-on screen of the display panel 10.
In this embodiment, the power chip 2002 provides a high potential power voltage PVDD and a low potential power voltage PVEE, the adjusting module 300 divides the high potential power voltage PVDD and/or the low potential power voltage PVEE into a 1 st to an nth parameter values, for example, 5 steps, and the 1 st to the nth parameter values are gradually increased, so that the load of the power chip 2002 is gradually increased and approaches the voltage in the display state, at this time, the driving load of the power chip 2002 is increased from low to high, the luminance of the display panel 10 approaches the luminance in the display state from low to high, by setting a transition frame, the display panel 10 is slowly started, the load of the power chip 2002 is not suddenly increased to the display state, and thereby the phenomenon of abnormal power-on picture of the display panel 10 is reduced.
In some optional embodiments, referring to fig. 6, fig. 6 is a schematic plane structure diagram of another display module provided in the present invention, and the adjusting module 300 is integrated in the display driving chip 2001.
Optionally, the adjusting module 300 is configured to divide the first signal into n shift stages corresponding to the transition frames 1 to nth frames, so that the adjusting module 300 may be directly integrated in the display driver chip 2001, which may reduce the occupied space of the adjusting module 300.
In some alternative embodiments, with continued reference to fig. 3 and 4, the refresh frequency of the transition frame is equal to the refresh frequency of the display state.
It will be appreciated that the frequency of the display panel 10 in the display state is typically high, for example 120Hz, and the refresh frequency of the transition frame is the same as the refresh frequency of the display state, so that the presence of a change in the transition frame is not visually perceptible. If the refresh rate of the transition frame is greater or less than the refresh rate of the display state, the presence and change of the transition frame is visually perceived.
In some alternative embodiments, with continued reference to FIGS. 3 and 4,5 ≦ n ≦ 10.
The number of transition frames in fig. 3 is 5, the number of transition frames in fig. 4 is 7, where the number of transition frames cannot be too large or too small, if the number of transition frames is too small, for example, the number n of transition frames is 1, the transition is not obvious, the load of the chip 200 is not a load gradually increased to a display state, the effect of improving the abnormality of the power-on picture is not good, and if the number of transition frames is too large, the time occupied by the transition frames is too long, and the transition frames are easily recognized by human eyes, which is not beneficial to displaying the picture. In this embodiment, n is greater than or equal to 5 and less than or equal to 10, that is, a good transition is formed between the screen-off state and the display state, and the chip 200 load is gradually increased and approaches the load in the display state to improve the abnormal effect of the power-on picture on the display panel 10.
In some alternative embodiments, with continued reference to fig. 3 and 4, in the breath-screen state, the chip 200 provides the second signal to the display panel 10, and in the display state, the chip 200 provides the third signal to the display panel 10, and the second signal, the third signal, and the first signal are all different.
It is understood that the second signal is different from the third signal in the display state, the second signal of the chip 200 is used for driving the transition frame, and the first signal is between the second signal and the third signal. For example, when the first signal, the second signal, and the third signal are all gate driving circuit turn-on voltages, the second signal is smaller than the first signal, the first signal is smaller than the third signal, and the third signal is a signal in a display state, so that when the chip 200 provides the third signal, the load of the chip 200 is the largest, and from the off-screen state to the display state, the load of the chip 200 gradually increases, thereby displaying the problem of abnormal power-on picture of the panel 10.
Based on the same idea, the present invention further provides a driving method of a display module, the specific embodiment of the display module 100 in this embodiment can refer to fig. 1 to 6, and the display module 100 includes: a display panel 10; a chip 200 electrically connected to the display panel 10 and providing a first signal to the display panel 10; a regulating module 300 electrically connected to the chip 200, wherein the regulating module 300 sets the first signal to the 1 st to nth parameter values;
referring to fig. 7 in combination with fig. 1 to 6, fig. 7 is a flowchart of a driving method of a display module according to the present invention, the driving method includes:
s101, the display panel 10 is in a breath screen state, and the chip 200 provides a second signal for the display panel 10;
s102, the display panel 10 enters a transition state, the transition state comprises n transition frames, in the transition frames from 1 st to nth, the adjusting module 300 sets the first signal as the parameter values from 1 st to nth, the parameter values from 1 st to nth correspond to the n transition frames one by one, the parameter values from 1 st to nth are transmitted to the display panel 10 through the chip 200 in sequence, and the brightness of the transition frame from 1 st is smaller than that of the transition frame from nth;
s103, the display panel 10 enters a display state, and the chip 200 provides a third signal to the display panel 10.
The adjusting module 300 is electrically connected to the chip 200, the adjusting module 300 sets the first signal provided by the chip 200 to the 1 st to nth parameter values, although the brightness of the corresponding display panel 10 is different, when the display panel 10 is in the osd state, the chip 200 provides the second signal to the display panel 10, and the chip 200 is in the idle state; entering a transition state before entering a display state, wherein the transition state has a 1 st to nth transition frame, that is, the display panel 10 increases n gears for transition before formal display, the display panel 10 receives the 1 st to nth parameter values from the 1 st transition frame to the nth transition frame, the display panel 10 displays the transition from the 1 st gear to the nth gear gradually, the driving power required by the display panel 10 of the 1 st transition frame is less than the driving power required by the display panel 10 of the nth transition frame, the driving load of the chip 200 of the 1 st transition frame is also less than the driving load of the chip 200 of the nth transition frame, the luminance of the 1 st transition frame is less than the luminance of the nth transition frame, and the luminance of the nth transition frame is close to the luminance in the display state; in the display state, the chip 200 provides the display panel 10 with a third signal for displaying. By setting the transition state in which the display panel 10 displays the transition frame, the display panel 10 achieves a slow start, the load on the chip 200 does not suddenly increase to the load in the display state, and the load on the chip 200 gradually increases to the load in the display state, thereby reducing the phenomenon that the power-on picture of the display panel 10 is abnormal.
In some alternative embodiments, please refer to fig. 8, where fig. 8 is a schematic plane structure diagram of a display device according to an embodiment of the present invention, and the display device 111 according to the embodiment includes the display module 100 according to the above embodiment of the present invention. Optionally, the display device 111 may be an organic light emitting display panel, the type of the display device 111 is not specifically limited in this embodiment, and the display device 111 may be set according to actual requirements during specific implementation. The embodiment of fig. 8 only takes a mobile phone as an example to describe the display device 111, and it should be understood that the display device 111 provided in the embodiment of the present invention may be other display devices 111 with a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited to this. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the display module 100 provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display module 100 in the foregoing embodiments, which is not repeated herein.
According to the embodiment, the display module, the driving method thereof and the display device provided by the invention at least realize the following beneficial effects:
in the related art, all pixel circuits in a display panel need to be driven during display, a display driving chip has no external circuit, a power supply chip has an external circuit, the output states of the display driving chip and the power supply chip in no-load (i.e. a screen resting state) and mounting (a display state) are different, the display driving chip and the power supply chip suddenly load the driving circuit of the whole screen at the moment of power-on of the display panel, the instantaneous output load is extremely large and the state is unstable, so that the instability of driving time sequence voltage and pixel voltage can be caused, and the problem of instantaneous picture abnormity is caused. The invention is additionally provided with an adjusting module which is electrically connected with a chip, wherein a first signal provided by the chip is set as a 1 st parameter value to an nth parameter value in the adjusting module, the brightness of corresponding display panels is different, and the chip is in an idle state under the screen-on-screen state of the display panel; the method comprises the steps that 1 to nth transition frames are carried out before a display state is entered, namely, n gears are added to a display panel for transition before formal display, the display panel receives 1 to nth parameter values successively from the 1 st transition frame to the nth transition frame, the display panel gradually displays from the 1 st gear to the nth gear, the driving power required by the display panel of the 1 st transition frame is smaller than the driving power required by the display panel of the nth transition frame, the driving load of a chip of the 1 st transition frame is smaller than the driving load of a chip of the nth transition frame, the brightness of the 1 st transition frame is smaller than that of the nth transition frame, the brightness of the nth transition frame is close to that in the display state, the display panel achieves slow start by setting the transition frames, the load on the chip cannot suddenly increase to the load in the display state, and the load on the chip gradually increases to the load in the display state, so that abnormal phenomena of power-on pictures on the display panel are reduced.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (12)

1. A display module, comprising:
a display panel;
the chip is electrically connected with the display panel and provides a first signal for the display panel;
the adjusting module is electrically connected with the chip and is used for setting the first signal to be the 1 st to the nth parameter values;
the display panel comprises a screen turning state and a display state, n transition frames are further included between the screen turning state and the display state, the 1 st to nth parameter values are in one-to-one correspondence with the n transition frames, the 1 st to nth parameter values are sequentially transmitted to the display panel through the chip, and the brightness of the 1 st transition frame is smaller than that of the nth transition frame.
2. The display module as claimed in claim 1, wherein the luminance of the 1 st transition frame gradually increases to the luminance of the nth transition frame.
3. The display module according to claim 1, wherein the first signal comprises at least one of a Gamma value, a gate driving circuit turn-on voltage, a gate driving circuit turn-off voltage, a high potential power voltage, a low potential power voltage, a high potential data signal, or a low potential data signal.
4. The display module of claim 2, wherein when the first signal includes a Gamma value, the Gamma value of the 1 st transition frame is greater than the Gamma value of the nth transition frame.
5. The display module of claim 2, wherein when the first signal comprises at least one of a gate driving circuit turn-on voltage, a gate driving circuit turn-off voltage, a high-level power voltage, a low-level power voltage, a high-level data signal, or a low-level data signal, the parameter value of the 1 st transition frame is smaller than the parameter value of the nth transition frame.
6. The display module of claim 2, wherein the chips comprise a display driver chip and a power chip, the display driver chip is electrically connected to the power chip, the display driver chip provides a gate driver circuit turn-on voltage, a gate driver circuit turn-off voltage, a high potential data signal and a low potential data signal, and the power chip provides a high potential power voltage and a low potential power voltage.
7. The display module of claim 6, wherein the adjusting module is integrated in the display driving chip.
8. The display module of claim 1, wherein the refresh rate of the transition frame is equal to the refresh rate of the display state.
9. The display module of claim 1, wherein n is greater than or equal to 5 and less than or equal to 10.
10. The display module of claim 1, wherein in the touch-down state, the chip provides a second signal to the display panel, and in the display state, the chip provides a third signal to the display panel, and the second signal, the third signal and the first signal are different.
11. A driving method of a display module is characterized in that the display module comprises: a display panel; the chip is electrically connected with the display panel and provides a first signal for the display panel; the adjusting module is electrically connected with the chip and is used for setting the first signal to be the 1 st to the nth parameter values;
the driving method includes:
the display panel is in a screen-off state, and the chip provides a second signal for the display panel;
the display panel enters a transition state, the transition state comprises n transition frames, in the transition frames from 1 st to nth, the adjusting module sets a first signal as the parameter values from 1 st to nth, the parameter values from 1 st to nth correspond to the transition frames one by one, the parameter values from 1 st to nth are transmitted to the display panel through the chip in sequence, and the brightness of the transition frame from 1 st is less than that of the transition frame from nth;
the display panel enters a display state, and the chip provides a third signal for the display panel.
12. A display device comprising the display panel according to any one of claims 1 to 10.
CN202211348794.1A 2022-10-31 2022-10-31 Display module, driving method thereof and display device Pending CN115631724A (en)

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