CN210136712U - Display driving chip, display panel, display device and display system - Google Patents
Display driving chip, display panel, display device and display system Download PDFInfo
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- CN210136712U CN210136712U CN201921488695.7U CN201921488695U CN210136712U CN 210136712 U CN210136712 U CN 210136712U CN 201921488695 U CN201921488695 U CN 201921488695U CN 210136712 U CN210136712 U CN 210136712U
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Abstract
The embodiment of the utility model provides a display driver chip, display panel, display device and display system relates to and shows technical field. The display driving chip comprises a plurality of driving output ends and at least one first connecting terminal, wherein the driving output ends are used for outputting driving voltage signals to a display panel of the display device, the first connecting terminal is used for being connected with a system voltage terminal in the display device, and the system voltage terminal is positioned outside the display driving chip. Each driving output end is connected to the first connecting terminal when the display equipment is powered on or powered off so as to control the display panel to display according to a preset mode. Therefore, the display abnormity of the display panel in the startup and shutdown process is avoided, and the display content of the display panel in the startup and shutdown process can be changed to adapt to the requirements of different display devices without redesigning the display driving chip.
Description
Technical Field
The utility model relates to a show technical field, particularly, relate to a display driver chip, display panel, equipment and system.
Background
In the display system, the driving chip controls the display panel to display according to the video data obtained from the front end system. In the starting process, when the external power supply is started and the video data of the front-end system does not reach the driving chip, the driving chip cannot control the display panel to normally display. When the external power supply is turned off, the residual charges in the display panel cannot be released in time, so that the display of the display panel is abnormal in the shutdown process.
The driving chip of the existing display device is usually designed with a corresponding circuit to control the display panel to normally display in the above-mentioned power-on process and power-off process. However, once the display requirements of the display device for the startup process and the shutdown process are changed, the driver chip needs to be redesigned, and the development time is prolonged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a show driver chip and display device can avoid display panel to show unusually at the switching on and shutting down in-process, and can change the display content of display device at the switching on and shutting down in the condition of not showing driver chip redesign.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, an embodiment of the present invention provides a display driver chip, including:
a plurality of driving output terminals for outputting driving voltage signals to a display panel of the display device;
at least one first connection terminal for connecting with a system voltage terminal of the display device, the system voltage terminal being located outside the display driving chip;
the plurality of driving output ends are connected with the first connecting terminal when the display equipment is powered on or powered off so as to control the display panel to display according to a preset mode.
In an alternative embodiment, the system voltage terminal is located on a circuit board, and the circuit board is used for controlling the display driving chip;
the circuit board comprises a second connecting terminal used for being connected with the first connecting terminal, and the second connecting terminal is connected with the system voltage terminal through a system part.
In alternative embodiments, the system component includes a resistor, a trace structure, or an inductor.
In an optional embodiment, the display driving chip includes a plurality of first connection terminals respectively connected to the plurality of driving output terminals, and the plurality of driving output terminals are respectively connected to the corresponding first connection terminals through a first switching device;
the first switching device is turned on when the display device is powered on or powered off, and is turned off when the display device displays normally.
In an alternative embodiment, the display driving chip includes a first connection terminal connected to each of the driving output terminals, and the plurality of driving output terminals are connected to the first connection terminal through a second switching device;
the second switch device is switched on when the display equipment is powered on or powered off and switched off when the display equipment displays normally.
In an optional embodiment, the first connection terminal is connected to an internal voltage terminal of the display driving chip when the display device is powered on or powered off.
In an alternative embodiment, the internal voltage terminal is a ground terminal.
In alternative embodiments, the system voltage terminal is a ground terminal, a common voltage terminal, or a power supply terminal.
In a second aspect, an embodiment of the present invention provides a display panel, which is connected to a driving output terminal of a display driving chip in any one of the implementation manners of the first aspect.
In a third aspect, an embodiment of the present invention provides a display device, including a display panel and the display driving chip described in any one of the foregoing implementation manners of the first aspect.
In an optional implementation manner, the plurality of driving output terminals of the display driving chip are connected to a system voltage terminal located outside the display driving chip through a routing structure.
In a fourth aspect, an embodiment of the present invention provides a display system, including the display device described in any one of the foregoing embodiments of the third aspect, where the display system displays data based on the display device.
Compared with the prior art, the utility model provides a display driver chip, display panel, equipment and system's beneficial effect is:
the embodiment of the utility model provides a display driver chip, display panel, equipment and system is used for the at least first connection terminal that links to each other with the system voltage terminal that lies in outside the display driver chip in the display device through the setting, configures the drive output end to be connected with a connecting terminal when the electricity or cut off the power supply on the display device to control display device's display panel and show according to the mode of predetermineeing. Therefore, the display content of the display panel of the display device in the startup and shutdown process can be controlled by changing the connection relation between the first connection terminal and the system voltage terminal, so that the display abnormity of the display panel in the startup and shutdown process is avoided, and the display content of the display panel in the startup and shutdown process can be changed to match different display devices without redesigning and modifying the display driving chip.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic block diagram of a display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display driver chip according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another display driver chip according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another display driver chip according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the connection between the display driver IC and the circuit board shown in FIG. 4;
FIG. 6 is another schematic diagram of the connection between the display driver chip and the circuit board shown in FIG. 4.
Icon: 10-a display device; 100-display driving chip; 110-a first connection terminal; 120-a switch assembly; 121-a first switching device; 122-a second switching device; 123-a third switching device; 200-a display panel; 300-a circuit board; 310-second connection terminal.
Detailed Description
In order to avoid that the display panel of the display device displays an abnormal picture during the power on/off process, a corresponding circuit is usually disposed on the display driving chip to control the display panel to display in a specific manner during the power on/off process. Once the display driving chip is manufactured, the circuit thereon will be determined, and correspondingly, the content displayed by the display panel during the power-on and power-off processes of the display device will be determined.
However, in practical applications, different display devices have different requirements for the display content of the display panel during the power on/off process, or when the system application in the display device is changed, the content that the display device needs to display on the display panel during the power on/off process will also be changed. If the display content of the display panel is to be changed during the on/off process, the display driver chip needs to be redesigned, i.e. the display driver chip is modified, so that the development cycle is prolonged.
In order to improve above-mentioned problem partially at least, the embodiment of the utility model provides a show driver chip, display panel, equipment and system can realize the modification to the display content of the display panel of the in-process display device of switching on and switching off under the condition that does not carry out redesign to show driver chip.
The defects existing in the above solutions are all the results obtained after practice and careful study, so the discovery process of the above problems and the solutions proposed in the following embodiments for the above problems should be considered as contributions to the present invention.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
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, it need not be further defined and explained in subsequent figures.
Referring to fig. 1, fig. 1 shows a block diagram of a display device 10. The display device 10 includes a display driving chip 100, a display panel 200, and a circuit board 300 for controlling the display driving chip 100, wherein the circuit board 300 is electrically connected to the display driving chip 100, and the display driving chip 100 is electrically connected to the display panel 200. Illustratively, the circuit board 300 may be a Printed Circuit Board (PCB).
The circuit board 300 is used for providing signals, such as video data, voltage signals and other control signals, required by the operation of the display driving chip 100. Of course, the circuit board 300 may also integrate circuits for controlling other devices, and the embodiment is not limited thereto.
Referring to fig. 2, fig. 2 shows a display driver chip 100 provided in this embodiment.
The display driving chip 100 includes a plurality of driving output terminals and at least one first connection terminal 110. The plurality of driving output terminals may be, for example, N driving output terminals, which are out 1, out 2, … … and outN (N is a positive integer) shown in fig. 2, the display driving chip 100 may control the N driving output terminals to output driving voltage signals to the display panel 200 according to the video data input by the circuit board 300, and the display panel 200 performs display according to the received driving voltage signals.
Each of the driving output terminals is connected to the first connection terminal 110 when the display device 10 is powered on or powered off. In this embodiment, each of the driving output terminals may be connected to the first connection terminal 110 through the switching assembly 120. Correspondingly, the display driving chip 100 may further include a control circuit for controlling the switching component 120.
In one embodiment, the control circuit may directly detect whether the display device 10 is powered on or powered off, and control the switch element 120 to be turned on when the display device is powered on or powered off. In another embodiment, the control circuit may detect the power of the display device 10, and when detecting that the power of the display device 10 is turned on, the control circuit may determine that the display device 10 is powered on, and may further control the switch element 120 to be turned on; when it is detected that the power of the display device 10 is turned off, it may be determined that the display device 10 has been powered off, and the switching element 120 may be controlled to be turned on.
In both embodiments, the control circuit may be further configured to control the switch element 120 to be turned off when detecting that the display device 10 displays normally.
When the control circuit detects the video data input to the display driving chip 100, it may be determined that the display device 10 is in the normal display state.
It should be noted that, during the booting process, the display driver chip 100 cannot drive the display panel 200 to normally display the video data provided by the front-end system. Therefore, when the video data provided by the front-end system arrives, the switch component 120 needs to be turned off, so that the display driving chip 100 drives the display panel 200 according to the video data. During the shutdown process, the display panel 200 displays the display according to the energy stored in the energy storage element therein, and when the energy stored in the energy storage element is released, the display is not performed.
In this embodiment, the at least one first connection terminal 110 is used for connecting with a system voltage terminal in the display device 10, which is located outside the display driving chip 100.
In the production process, the manufactured display driving chip needs to be installed in the display device, and the display driving chip is electrically connected to the control device inside the display device, in this process, according to the requirement of the display device 10 for the display content in the on-off process, one of the system voltage terminals of the display device may be selected to be connected to each of the first connection terminals 110.
For example, if it is required that the display panel 200 of the display device 10 is completely black during the power on and off process, each of the first connection terminals 110 may be connected to the Ground (GND) of the display device 10. As another example, if the display panel 200 of the display device 10 is required to display a gray-scale image of a specific gray scale during the power-on and power-off processes, the voltage required to be output to the driving output terminal through the display driving chip 100 may be determined according to the specific gray scale, so as to connect the first connection terminal 110 to the system voltage terminal capable of substantially providing the voltage.
Based on the above design, the display content of the display panel 200 during the power on/off process can be controlled by changing the connection relationship between the first connection terminal 110 and the system voltage terminal of the display device 10, which is located outside the display driver chip 100, so that the display abnormality of the display panel 200 during the power on/off process can be avoided, and the display content of the display panel 200 during the power on/off process can be changed to adapt to different display devices without redesigning and modifying the display driver chip 100.
In the present embodiment, the system voltage terminal may be located on any circuit board of the display device 10 different from the display driving chip 100. Since some pins of the display driving chip 100 need to be connected to the circuit board 300 when the display driving chip 100 is installed in the display device 10, the system voltage terminal may preferably be a system voltage terminal on the circuit board 300, such as GND, a common voltage terminal (VCOM), a power supply terminal (HVDD), or the like on the circuit board 300.
In this embodiment, the display driving chip 100 may be provided with one first connection terminal 110 or a plurality of first connection terminals 110 respectively corresponding to the plurality of driving output terminals.
Referring to fig. 3, a schematic diagram of the display driver chip 100 having N first connection terminals 110 corresponding to the N driving output terminals out 1 to outN is shown. In this case, the switching assembly 120 may include a plurality of first switching devices 121, and the N driving output terminals are respectively connected to a corresponding first connection terminal 110 through one first switching device 121.
Correspondingly, each of the first switching devices 121 is controlled by the control circuit in a unified manner, and is turned on when the display device 10 is powered on or powered off, and is turned off when the display device 10 displays normally.
Referring to fig. 4, a schematic diagram of the display driver chip 100 having only one first connection terminal 110 is shown. The N driving output terminals out 1 to outN of the display driving chip 100 are respectively connected to a node, such as a node O shown in fig. 4, through a first switching device 121, and the node O is connected to the first connection terminal 110 through a second switching device 122. The switching component 120 includes N first switching devices 121 and one second switching device 122. The second switching device 122 and the N first switching devices 121 are controlled by a control circuit.
In the present embodiment, it is necessary to connect the first connection terminal 110 of the display driving chip 100 to one system voltage terminal of the circuit board 300 according to the requirement of the display device 10 for display contents during the power-on and power-off processes. In one embodiment, this may be accomplished by deploying the corresponding circuitry on circuit board 300.
In detail, referring to fig. 5, fig. 5 is a schematic diagram illustrating a connection between the display driver chip 100 and the circuit board 300 shown in fig. 4. The circuit board 300 includes the second connection terminal 310 and the system voltage terminals, and the first connection terminal 110 is connected to the second connection terminal 310, in other words, the plurality of driving output terminals of the display driving chip 100 are connected to the corresponding system voltage terminals on the circuit board 300 through the first connection terminal 110 and the second connection terminal 310 in turn, for example, may be connected to one of the system voltage terminals A, B shown in fig. 6. It is understood that, besides the system voltage terminals a and B, other system voltage terminals may be disposed on the circuit board 300, and the plurality of driving output terminals may be connected to one of the other system voltage terminals through the first connection terminal 110 and the second connection terminal 310 in sequence, which is not limited by the embodiment.
The system voltage terminal may be connected to the second connection terminal 310 through a system part. Illustratively, the system component may be a resistor, a trace structure, an inductor, or the like, which is not limited by the embodiment.
In one example, a resistor package for indicating the appearance of an actual resistor and the position of a solder joint may be provided between the system voltage terminal and the second connection terminal 310 on the circuit board 300. Referring to the scenario shown in fig. 5, a resistor package is disposed between the system voltage terminal a and the second connection terminal 310, and the resistor package is used for mounting a resistor R1, and when the resistor R1 is mounted on the resistor package, the system voltage terminal a and the second connection terminal 310 are electrically connected through a resistor R1. For another example, a resistor package is disposed between the system voltage terminal B and the second connection terminal 310, the resistor package is used for mounting the resistor R2, and when the resistor package is mounted with the resistor R2, the system voltage terminal B and the second connection terminal 310 are electrically conducted through the resistor R2.
In practice, according to the system voltage terminal to which the first connection terminal 110 needs to be connected, the corresponding resistor of the system voltage terminal may be packaged with a piece (i.e., the corresponding resistor is mounted). In this case, one of the plurality of resistor packages on the circuit board 300 is mounted with a resistor.
In this embodiment, the resistor mounted on the resistor package may be a zero ohm resistor, so that the voltages of the plurality of driving output terminals and the voltage of the connected system voltage terminal are substantially the same.
It should be noted that, in practical applications, some display devices do not have specific requirements on the display content of the display panel during the power on/off process, and only need to ensure the display consistency of each pixel of the display panel, in other words, only need to ensure the electric potentials of each driving output terminal of the display driving chip to be consistent. Such a display requirement can also be achieved by the display driver chip and the display device provided in this embodiment, specifically, a resistor may not be mounted on any resistor package, that is, no resistor is mounted on any of the resistor packages, so that the second connection terminal 310 is not connected to any system voltage terminal. Since the plurality of drive output terminals are connected to one terminal, the potentials thereof are substantially uniform.
Similarly, the resistive package in the above example may be replaced with an inductive package for mounting an inductor.
In another embodiment, it is considered that the display driver chip 100 and the circuit board 300 need to be connected by COF (chip on Film) technology in the manufacturing process of the display device. Correspondingly, in the present embodiment, in the process of connecting the display driver chip 100 to the circuit board 300, a wire may be routed between the first connection terminal 110 of the display driver chip 100 and a specific system voltage terminal of the circuit board 300, so that the first connection terminal 110 is connected to the specific system voltage terminal of the circuit board 300 through a wire structure. The wiring structure is a thin Film (Film) wiring structure.
Alternatively, as shown in fig. 6, the first connection terminal 110 may also be connected to an internal voltage terminal (e.g., a voltage terminal C in fig. 6) of the display driving chip 100 when the display device 10 is powered on or powered off. In detail, the switching assembly 120 may further include a third switching device 123, and the first connection terminal 110 is connected to the internal voltage terminal via the third switching device 123. The third switching device 123 is controlled by the control circuit to be turned on when the display apparatus 10 is powered on or off and to be turned off when the display apparatus 10 displays normally.
In this way, the display content of the display panel 200 of the display device 10 during the power-on and power-off process can also be controlled through the internal voltage terminal of the display driving chip 100.
Alternatively, the internal voltage terminal may be, for example, GND, to which the pixel units in the display panel 200 are connected via the driving output terminals, and the energy storage elements in the display panel 200 may be caused to rapidly discharge charges after the display device 10 is powered off.
In the present embodiment, the display device 10 may be used in combination with other various external devices or components. Based on this, the present embodiment further provides a display system, which includes a display device 10 and a control component, where the control component is configured to provide data to be displayed to the display device 10, and control the display device 10 to display the data to be displayed. The control component may be, for example, any device or component having a data control function, such as a display card, a host, and a central processing unit, which is not limited in this embodiment.
To sum up, the embodiment of the utility model provides a display driver chip, display panel, equipment and system is used for the at least first connecting terminal that links to each other with the system voltage terminal that lies in outside the display driver chip in the display device through the setting, configures the drive output end to be connected with a connecting terminal when the electricity or outage on the display device to control display device's display panel and show according to the predetermined mode. Therefore, the display content of the display panel of the display device in the startup and shutdown process can be controlled by changing the connection relation between the first connection terminal and the system voltage terminal, so that the display abnormity of the display panel in the startup and shutdown process is avoided, the display content of the display panel in the startup and shutdown process can be changed to adapt to different display devices without redesigning and modifying the display driving chip, the development time is saved, and the development efficiency is improved.
In the description of the present invention, it is to be understood that the terms "first", "second", "third", and the like are used merely for distinguishing between descriptions and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Features in embodiments of the invention may be combined with each other without conflict. The foregoing description is only for the purpose of illustrating selected embodiments of the present invention and is not intended to limit the present invention in any way, since numerous modifications and variations will readily occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A display driver chip, comprising:
a plurality of driving output terminals for outputting driving voltage signals to a display panel of the display device;
at least one first connection terminal for connecting with a system voltage terminal of the display device, the system voltage terminal being located outside the display driving chip;
the plurality of driving output ends are connected with the first connecting terminal when the display equipment is powered on or powered off so as to control the display panel to display according to a preset mode.
2. The display driver chip of claim 1, wherein the system voltage terminal is located on a circuit board, the circuit board being configured to control the display driver chip;
the circuit board comprises a second connecting terminal used for being connected with the first connecting terminal, and the second connecting terminal is connected with the system voltage terminal through a system part.
3. The display driver chip of claim 2, wherein the system component comprises a resistor, a trace structure, or an inductor.
4. The display driver chip according to any one of claims 1 to 3,
the display driving chip comprises a plurality of first connecting terminals which are correspondingly connected with the plurality of driving output ends respectively, and the plurality of driving output ends are connected with the corresponding first connecting terminals through a first switching device respectively;
the first switching device is turned on when the display device is powered on or powered off, and is turned off when the display device displays normally.
5. The display driver chip according to any one of claims 1 to 3,
the display driving chip comprises a first connecting terminal connected with each driving output end, and the plurality of driving output ends are connected with the first connecting terminals through a second switching device;
the second switch device is switched on when the display equipment is powered on or powered off and switched off when the display equipment displays normally.
6. The display driver chip according to any one of claims 1 to 3, wherein the first connection terminal is connected to an internal voltage terminal of the display driver chip when the display device is powered on or powered off.
7. The display driver chip of claim 6, wherein the internal voltage terminal is a ground terminal.
8. The display driver chip according to any one of claims 1 to 3, wherein the system voltage terminal is a ground terminal, a common voltage terminal, or a power supply terminal.
9. A display panel connected to a drive output terminal of the display drive chip according to any one of claims 1 to 8.
10. A display device comprising a display panel and the display driver chip of any one of claims 1 to 8.
11. The display device according to claim 10, wherein the plurality of driving output terminals of the display driving chip are connected to a system voltage terminal located outside the display driving chip through a routing structure.
12. A display system comprising the display device of claim 10 or 11, the display system performing data display based on the display device.
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| CN201921488695.7U CN210136712U (en) | 2019-09-06 | 2019-09-06 | Display driving chip, display panel, display device and display system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110544454A (en) * | 2019-09-06 | 2019-12-06 | 北京集创北方科技股份有限公司 | Display driving chip, display panel, equipment and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110544454A (en) * | 2019-09-06 | 2019-12-06 | 北京集创北方科技股份有限公司 | Display driving chip, display panel, equipment and system |
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