TWI744603B - Display apparatus and operating method thereof - Google Patents

Abstract

A display apparatus and an operating method thereof are disclosed. The display apparatus includes a display panel module, a first power supply module and a second power supply module. The display panel module is used to display a display data. The first power supply module is coupled to the display panel module. When the display apparatus is operated in a first mode, the first power supply module provides a first voltage to the display panel module. The second power supply module is coupled to the display panel module. When the display apparatus is operated in a second mode, the second power supply module provides a second voltage to the display panel module. During a specific period of time after switching between the first mode and the second mode, the display data displayed by the display panel module stops updating.

Description

Display device and its operation method

The present invention is related to displays, and more particularly to a display device and its operating method.

Generally speaking, when the display device is operating in the normal mode, the display panel is powered by the power integrated circuit (Power IC); when the display device is operating in the standby constant display (Always On Display, AOD) mode, the display panel is powered by the display Driver integrated circuit (Display Driver IC) power supply.

Therefore, when the operating mode of the display device is switched, if it is switched from the normal mode to the AOD mode, the display driver integrated circuit will be turned on and the power integrated circuit will be turned off at the same time; if it is switched from the AOD mode to the normal mode, it will be turned on at the same time Power the integrated circuit and close the display driver integrated circuit.

Since the power integrated circuit and the display driver integrated circuit are different integrated circuits, the different voltages provided by the power integrated circuit and the display driver integrated circuit during the switching process of the operation mode of the display device are larger. Transient voltage changes can easily cause transient flicker on the display screen of the display panel.

In order to improve the above transient flicker phenomenon, the traditional solution is In the process of switching the operation mode of the display device, a black screen is inserted to prevent the display panel from displaying a flickering screen.

For example, as shown in Figure 1, when the operating mode of the display device is switched from the normal mode NM to the AOD mode AODM, the display data STP sent to the display panel continues to update the UD, but a transient voltage is likely to occur at this time The screen flicker caused by the instability, it is necessary to insert a black screen BLK to replace the normal display screen NDP to prevent the user from seeing the flickering display screen. In addition, as shown in FIG. 2, when the black screen BLK is displayed on the display panel, the gate driving signal GOA and the panel switching signal SW continue to be provided without stopping.

Although the above-mentioned traditional solution can prevent the user from viewing the flickering display screen, it also causes the user to have a short visual experience of a black screen transition when viewing the display screen, which still needs to be further improved.

In view of this, the present invention provides a display device and an operating method thereof to effectively solve the above-mentioned problems encountered in the prior art.

A specific embodiment according to the present invention is a display device. In this embodiment, the display device includes a display panel module, a first power supply module, and a second power supply module. The display panel module is used for displaying a display data. The first power supply module is coupled to the display panel module. When the display device operates in the first mode, the first power supply module provides the first voltage to the display panel module. The second power supply module is coupled to the display panel module. When the display device operates in the second mode, the second power supply module provides a second voltage to the display panel module. Among them, after switching between the first mode and the second mode, a period of special Within a certain period of time, the display data displayed by the display panel module will stop updating.

In one embodiment, during the specific period of time after the first mode and the second mode are switched, the display data stops updating from the previous display to the current display, so that the display panel module still displays the previous display.

In one embodiment, the first power supply module is a power integrated circuit (Power IC) and the first mode is a normal mode (Normal Mode).

In one embodiment, the second power supply module is a display driver integrated circuit (Display Driver IC) and the second mode is an idle mode (Idle Mode).

In one embodiment, the first mode and the second mode are switched from the first mode to the second mode, or from the second mode to the first mode.

In one embodiment, when the first mode and the second mode are switched, the first voltage provided by the first power supply module and the second voltage provided by the second power supply module will undergo transient voltage changes.

In one embodiment, the display data displayed by the display panel module is updated by the second power supply module, and the second power supply module stops updating during the specific period of time after the first mode and the second mode are switched Display information.

In one embodiment, after the first mode and the second mode are switched, the display data is stopped from being updated by extending the vertical back porch (VBP) during the specific period of time after switching.

In one embodiment, during the specific period of time after the first mode and the second mode are switched, the display data is stopped from being updated by stopping the gate driving signal or the panel switching signal.

Another embodiment according to the present invention is a display device operating method. In this embodiment, the display device operating method is used to operate the display device. The display device includes a display panel module, a first power supply module, and a second power supply module. The display device operating method includes the following steps: when the display device is operating in the first mode, the first power supply module provides the first voltage to the display panel module; when the display device is operating in the second mode, the second power supply module provides the first voltage Two voltages are applied to the display panel module; and within a certain period of time after the first mode and the second mode are switched, the display data displayed by the display panel module is stopped updating.

Compared with the prior art, the present invention temporarily stops updating the display data provided to the display panel module during the switching process of the operation mode of the display device, so that the display panel module continues to display the previous display screen without flicker. Even if the transient voltage is unstable after the operation mode of the display device is switched, the display panel module will not display a flickering screen, and of course there is no need to insert a black screen. Therefore, the display device and the operating method of the present invention can effectively improve the deficiency of the prior art, thereby providing the user with a good visual experience when viewing the display screen.

The advantages and spirit of the present invention can be further understood from the following detailed description of the invention and the accompanying drawings.

S10~S14‧‧‧Step

NM‧‧‧Normal mode

AODM‧‧‧AOD mode

UD‧‧‧Update

NDP‧‧‧Normal display screen

BLK‧‧‧Black screen

Vsync‧‧‧Vertical sync signal

STP‧‧‧Display data

P‧‧‧Display screen

TE‧‧‧clock signal

T‧‧‧A certain period of time

GOA‧‧‧Gate drive signal

SW‧‧‧Panel switching signal

1‧‧‧Display device

10‧‧‧Display Panel Module

11‧‧‧The first power supply module

12‧‧‧Second power supply module

V1‧‧‧First voltage

V2‧‧‧Second voltage

EXT‧‧‧Extend the vertical back edge

FIG. 1 is a schematic diagram showing that in the prior art, a black screen must be inserted during the switching process of the operation mode of the display device to prevent the display from flickering temporarily.

FIG. 2 is a schematic diagram showing that when the display device displays a black screen, the gate driving signal and the panel switching signal are still provided without stopping.

3A and 3B are schematic diagrams respectively showing the operation of the display device in a first mode and a second mode according to a preferred embodiment of the present invention.

FIG. 4 is a schematic diagram of the present invention stopping updating the display data during the switching process of the operation mode of the display device.

FIG. 5 is a schematic diagram showing that the display data can be stopped to be updated by extending the vertical trailing edge during a certain period of time after the operation mode of the display device is switched.

FIG. 6 is a schematic diagram showing that the display data can be stopped updating by stopping the gate driving signal or the panel switching signal for a certain period of time after the operation mode of the display device is switched.

FIG. 7 is a flowchart of a display device operating method according to another preferred embodiment of the present invention.

A specific embodiment according to the present invention is a display device. In this embodiment, the display device may be an Organic Light-Emitting Diode (OLED) display, but it is not limited to this.

Please refer to FIGS. 3A and 3B. FIGS. 3A and 3B are schematic diagrams showing the operation of the display device in this embodiment in the first mode and the second mode, respectively.

As shown in FIGS. 3A and 3B, the display device 1 includes a display panel module 10, a first power supply module 11 and a second power supply module 12. The first power supply module 11 and the second power supply module 12 are respectively coupled to the display panel module 10. The display device 1 can operate in a first mode and a second mode, respectively, and the first mode and the second mode can be switched with each other.

According to FIG. 3A, it can be seen that when the display device 1 is operating in the first mode, the first power supply module 11 provides the first voltage V1 to the display panel module 10. According to FIG. 3B, it can be seen that when the display device 1 is operating in the second mode, the second power supply module 12 provides the second voltage V2 to the display panel module 10.

In practical applications, the first power supply module 11 may be a power integrated circuit (Power IC) and the second power supply module 12 may be a display driver integrated circuit (Display Driver IC), but it is not limited to this. In addition, the first mode may be a normal mode (Normal Mode) and the second mode may be a standby mode (Idle Mode), such as an Always On Display (AOD) mode, but not limited to this.

Please also refer to FIG. 4. FIG. 4 is a schematic diagram of the present invention stopping updating the display data STP during the switching process of the operation mode of the display device 1.

As shown in FIG. 4, when the display device 1 is operating in the normal mode NM, the display data STP sent to the display panel module 10 will continuously update the UD. When the AOD mode AODM is activated for a period of time, the display device 1 will switch from the normal mode NM to the AOD mode AODM.

When the display device 1 is switched from the normal mode NM to the AOD mode AODM for a certain period of time T, the display data STP transmitted to the display panel module 10 will stop updating the NUD. After the specified period of time T has elapsed, the display data STP transmitted to the display panel module 10 starts to continuously update the UD. When the normal mode NM is activated for a period of time, the display device 1 will switch from the AOD mode AODM to the normal mode NM. In practical applications, the length of the specific time T can be determined according to actual requirements, and there is no specific limit.

Similarly, when the display device 1 is switched from the AOD mode AODM to the normal mode NM for a certain period of time, the display data STP transmitted to the display panel module 10 will stop updating the NUD. After the specific period of time has passed, the display data STP sent to the display panel module 10 starts to continuously update the UD. The rest can be deduced by analogy, so I won’t repeat them here.

It should be noted that since the display device 1 stops updating the display data STP for a certain period of time after its operation mode is switched, that is, the display panel module 10 still displays the previous display screen during the certain period of time without updating It is the current display screen. Therefore, even if there is transient voltage instability during the specific period of time, the previous display screen displayed by the display panel module 10 will not flicker, so it does not need to be the same as the prior art. Insert the black screen BLK to replace the normal display screen NDP, and the normal display screen NDP can always be provided, so as to provide the user with a good visual experience when watching.

In practical applications, there are different methods for how to stop updating the display data displayed by the display panel module.

For example, as shown in FIG. 5, when the display device 1 is switched from the AOD mode AODM to the normal mode NM for a certain period of time T, the display can be temporarily stopped by extending the vertical back porch (VBP) EXT. Update of information. Similarly, when the display device 1 is switched from the normal mode NM to the AOD mode AODM for a certain period of time, the update of the display data can also be temporarily stopped by extending the vertical trailing edge EXT. The rest can be deduced by analogy, so I won’t repeat them here.

In addition, as shown in FIG. 6, when the display device 1 changes from the AOD mode to AODM Within a certain period of time T after switching to the normal mode NM, the update of the display data can also be temporarily stopped by stopping the gate drive signal GOA or the panel switching signal SW. Similarly, after the display device 1 is switched from the normal mode NM to the AOD mode AODM, the update of the display data can be temporarily stopped by stopping the gate driving signal GOA or the panel switching signal SW during the specified period of time. The rest can be deduced by analogy, so I won’t repeat them here.

Another embodiment according to the present invention is a display device operating method. In this embodiment, the display device operating method is used to operate the display device. The display device includes a display panel module, a first power supply module, and a second power supply module. The first power supply module and the second power supply module are respectively coupled to the display panel module. The display device can operate in a first mode and a second mode respectively, and the first mode and the second mode can be switched with each other.

In practical applications, the first power supply module may be a power integrated circuit (Power IC) and the second power supply module may be a display driver integrated circuit (Display Driver IC), but it is not limited to this. In addition, the first mode may be a normal mode (Normal Mode) and the second mode may be a standby mode (Idle Mode), such as an Always On Display (AOD) mode, but not limited to this.

Please refer to FIG. 7. FIG. 7 shows a flowchart of the operation method of the display device in this embodiment.

As shown in FIG. 7, the operation method of the display device includes the following steps S10~S14: Step S10: When the display device is operating in the first mode, the first power supply The module provides the first voltage to the display panel module; step S12: when the display device is operating in the second mode, the second power supply module provides the second voltage to the display panel module; and step S14: in the first mode and the second mode After the two modes are switched, stop updating the display data displayed by the display panel module within a certain period of time.

In practical applications, the first mode and the second mode can be switched from the first mode to the second mode, or from the second mode to the first mode, and there is no specific limitation. When the first mode and the second mode are switched, the first voltage provided by the first power supply module and the second voltage provided by the second power supply module will undergo transient voltage changes.

In step S14, during the specific period of time after the first mode and the second mode are switched, the display data displayed by the display panel module will stop updating from the previous display screen to the current display screen, causing the display panel module to remain The previously displayed screen is displayed.

In practical applications, there are different methods for how to stop updating the display data displayed by the display panel module. For example, in the specific period of time after switching between the first mode and the second mode, the display data can be updated by extending the vertical back porch (VBP). In addition, the display data can also be updated by stopping the gate drive signal or the panel switching signal.

Compared with the prior art, the present invention temporarily stops updating the display data provided to the display panel module during the switching process of the operation mode of the display device, so that the display panel module continues to display the previous display screen without flicker. Even when After the operation mode of the display device is switched, there will be transient voltage instability, the display panel module will not display a flickering screen, and of course there is no need to insert a black screen. Therefore, the display device and the operating method of the present invention can effectively improve the deficiency of the prior art, thereby providing the user with a good visual experience when viewing the display screen.

Through the detailed description of the above preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the purpose is to cover various changes and equivalent arrangements within the scope of the patent for which the present invention is intended.

S10~S14‧‧‧Step

Claims (14)

A display device includes: a display panel module for displaying a display data according to a clock signal; a first power supply module coupled to the display panel module, when the display device is operating in a first mode, The first power supply module provides a first voltage to the display panel module; and a second power supply module coupled to the display panel module. When the display device operates in a second mode, the second power supply The module provides a second voltage to the display panel module; wherein, in a certain period of time after the first mode and the second mode are switched, the display device automatically extends the vertical back edge of the clock signal (Vertical back porch, VBP) to stop updating the display data displayed by the display panel module. For example, in the display device described in item 1 of the scope of patent application, in the specific period of time after the first mode and the second mode are switched, the display data stops updating from a previous display screen to a current display screen, As a result, the display panel module still displays the previous display screen. In the display device described in the first item of the scope of patent application, the first power supply module is a power integrated circuit (Power IC) and the first mode is a normal mode (Normal Mode). In the display device described in the first item of the scope of patent application, the second power supply module is a display driver integrated circuit (Display Driver IC) and the second mode is an idle mode (Idle Mode). The display device described in item 1 of the scope of patent application, wherein the first mode and the The second mode is switched from the first mode to the second mode, or from the second mode to the first mode. As for the display device described in claim 1, wherein when the first mode and the second mode are switched, the first voltage provided by the first power supply module and the second power supply module provided The second voltage will have a transient voltage change. For the display device described in item 1 of the scope of patent application, the display data displayed by the display panel module is updated by the second power supply module, after switching between the first mode and the second mode During the specific period of time, the second power supply module stops updating the display data. A display device operation method is used to operate a display device, the display device includes a display panel module, a first power supply module, and a second power supply module. The display device operation method includes the following steps: When operating in a first mode, the first power supply module provides a first voltage to the display panel module; when the display device operates in a second mode, the second power supply module provides a second voltage to the display panel module The display panel module; and the display panel module displays a display data according to a clock signal, and automatically extends the vertical trailing edge of the clock signal within a certain period of time after the first mode and the second mode are switched To stop updating the display data displayed by the display panel module. For example, the operating method of the display device described in item 8 of the scope of patent application, wherein the display device is displayed within the specified period of time after the first mode and the second mode are switched The data stops updating from a previous display screen to a current display screen, so that the display panel module still displays the previous display screen. According to the operating method of the display device as described in item 8 of the scope of patent application, the first power supply module is a power integrated circuit (Power IC) and the first mode is a normal mode (Normal Mode). According to the operating method of the display device described in the scope of patent application, the second power supply module is a display driver integrated circuit (Display Driver IC) and the second mode is an idle mode (Idle Mode). For the display device operating method described in item 8 of the scope of patent application, wherein the first mode and the second mode are switched from the first mode to the second mode, or from the second mode to the The first mode. The operating method of the display device as described in item 8 of the scope of patent application, wherein when the first mode and the second mode are switched, the first voltage provided by the first power supply module and the second power supply module The second voltage provided will have a transient voltage change. For example, the operating method of the display device described in item 8 of the scope of patent application, wherein the display data is updated by the second power supply module, and in the specific period of time after the first mode and the second mode are switched, The second power supply module stops updating the display data.

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