TWI718913B - Display method - Google Patents

Abstract

A display method is provided. The display method is suitable for a display panel having a first display area, a second display area and a bendable display area, wherein the bendable display area is disposed between the first display area and the second display area. The display method includes providing a driver to generate a driving signal to the display panel according to a control signal, and in a first operation mode in which the first display area and the second display area overlap each other, the driver causes a drive signal to cause one of a first sub display area and a second sub display area of the bendable display area to be based on a gradient display mode, and make the other one of the first sub display area and the second sub display area display according to a normal display mode or a full dark display mode.

Description

Display method

The present invention relates to a display technology, and particularly relates to a display method.

In today's foldable electronic devices (for example, tablet computers, smart phones, etc.), under some special designs, when the foldable electronic device performs a folding operation, the display panel of the foldable electronic device will be displayed in an outward direction. Wherein, the display panel usually has two display areas, and a bendable display area is set between the two display areas.

In the display state, one of the two display areas (for example, the first display area) can be used as the main display area for normal display mode operation, and the other of the two display areas (For example, the second display area) can be in full black display mode to reduce power consumption.

In contrast, the bendable display area adjacent to the first display area will operate in the normal display mode, and the bendable display area adjacent to the second display area will also operate in the full black display mode. However, when the foldable electronic device is used for a long time, the always-on light-emitting element in the display area (that is, adjacent to the The decay speed of the display area operating in the normal display mode is faster than that of the light-emitting element that is not always on (that is, adjacent to the display area operating in the full black display mode).

In this case, the bendable display area will have a difference in brightness and darkness. Therefore, the bendable display area on the display panel will be too prominent and obvious, which will result in the viewing quality of the user when viewing the screen. In view of this, how to effectively reduce the difference in brightness and darkness generated by the bendable display area to reduce the sensitivity of the human eye will be a subject for those skilled in the art.

The present invention provides a display method, which enables a first sub-display area or a second sub-display area of a bendable display area in a display panel to be displayed according to a gradient mode, so as to effectively reduce the output generated by the bendable display area. The difference between brightness and darkness, and further reduce the sensitivity of the human eye to the bendable display area.

The display method of the present invention is suitable for a display panel having a first display area, a second display area, and a bendable display area, wherein the bendable display area is disposed between the first display area and the second display area, and the display method includes : Provide a driver to generate a driving signal to the display panel according to the control signal; and in the first operation mode where the first display area and the second display area overlap each other, the driver makes the first sub-display of the bendable display area through the driving signal One of the first sub-display area and the second sub-display area is displayed according to the gradient mode, and the other of the first sub-display area and the second sub-display area is displayed according to the normal display mode or the full dark display mode.

Based on the above, the display methods described in the embodiments of the present invention can be displayed in the first display. In the first operation mode where the display area and the second display area overlap each other, the driver is caused to make one of the first sub-display area and the second sub-display area of the bendable area of the display panel according to the gradient mode through the driving signal The display is performed, and the other of the first sub-display area and the second sub-display area is displayed according to the normal display mode or the all-dark display mode. In this way, when the bendable display area is bent, the bendable display area is less prone to the problem of difference in brightness and darkness, thereby effectively reducing the sensitivity of the human eye to the bendable display area.

100: electronic device

110: display panel

120: Sensor

130: Controller

140, 840: drive

850: memory

A1, A21~A2N: display screen

AS1, AS2: active side

BDA: Bendable display area

CS: Control signal

CST: Capacitance

DS: drive signal

DA1, DA2: display area

D1, D2: direction

DC1, DC21~DC2N: display line

EM: Luminous signal

IS: indicator signal

L1: Zoning axis

M1~M9: Transistor

NAS1, NAS2: Inactive side

OLED: luminous signal

OVSS: system low voltage

OVDD: system high voltage

PIC: Gradient picture

SPIC: Select the gradient picture

S1~S3: control signal

SD1, SD2: sub display area

SR: Sensing result

S410~S480, S910~S920: steps

VDATA: data voltage

VP, VN: Reference voltage

FIG. 1 is a schematic structural diagram of an electronic device according to an embodiment of the invention.

FIG. 2 is a schematic diagram of a circuit block (Circuit Block) of the electronic device shown in the embodiment of FIG. 1 according to the present invention.

FIG. 3 is a schematic diagram of the display panel shown in the embodiment of FIG. 1 and FIG. 2 according to the present invention.

FIG. 4 is an operation flowchart of the electronic device shown in the embodiment of FIG. 2 according to the present invention.

5A and 5B are schematic diagrams illustrating the situation of the gradient mode according to an embodiment of the present invention.

6A and 6B are schematic diagrams illustrating the situation of the gradient mode according to another embodiment of the present invention.

FIG. 7 is a circuit diagram of pixel circuits in the display lines of the first sub-display area and the second sub-display area according to the present invention.

FIG. 8 is a circuit block diagram of a driver according to another embodiment of the invention.

FIG. 9 is a flowchart of a display method according to an embodiment of the invention.

The term "coupling (or connection)" used in the full text of the specification of this case (including the scope of the patent application) can refer to any direct or indirect connection means. For example, if the text describes that the first device is coupled (or connected) to the second device, it should be interpreted as that the first device can be directly connected to the second device, or the first device can be connected through other devices or some This kind of connection means is indirectly connected to the second device. In addition, wherever possible, elements/components/steps with the same reference numbers in the drawings and embodiments represent the same or similar parts. Elements/components/steps that use the same reference numerals or use the same terms in different embodiments may refer to related descriptions.

FIG. 1 is a schematic diagram of the structure of an electronic device 100 according to an embodiment of the present invention. Please refer to FIG. 1, in this embodiment, the electronic device 100 may be, for example, a smart phone or a tablet computer with a foldable function, but the present invention is not limited to this.

The electronic device 100 has a display panel 110. The user can perform operations on the display panel 110 to perform related functions of the electronic device 100 and generate a corresponding display screen on the display panel 110. Wherein, the display panel 110 of this embodiment may be a flexible display panel. In this embodiment, the display panel 110 has a first display area DA1, a second display area DA2, and a bendable display area BDA. Wherein, the bendable display area BDA has a first sub-display area SD1 and a second sub-display area SD2. Moreover, the electronic device 100 can be operated in the first operation mode or the second operation mode.

Furthermore, in the first operation mode, the electronic device 100 may be in a folded state, which means that the bendable display area BDA of the display panel 110 is in a bent state. At this time, the first display area DA1 and the second display area DA2 of the electronic device 100 may overlap each other. For example, in the electronic device 100 shown in FIG. 1, the active surface AS1 (that is, the display surface) of the first display area DA1 may face the first direction D1, and the inactive surface NAS1 ( That is, the non-display surface) may face the second direction D2. Moreover, the active surface AS2 of the second display area DA2 may face the second direction D2, and the inactive surface NAS2 of the second display area DA2 may face the second direction D1. Wherein, the first direction D1 and the second direction D2 are opposite to each other.

It is worth mentioning that in the first operation mode, when the user performs an operation in the first display area DA1 of the electronic device 100, the first display area DA1 can be displayed according to the normal display mode, and the second display area DA2 can be displayed according to the full dark display mode.

It should be noted that under some design requirements (in some embodiments), the first sub-display area SD1 adjacent to the first display area DA1 can be displayed according to the normal display mode, and adjacent to the second display area. The second sub-display area SD2 of the area DA2 can be displayed according to the gradient mode. Or, under some other design requirements (in some other embodiments), the first sub-display area SD1 adjacent to the first display area DA1 may be displayed according to the gradient mode, but adjacent to the second display area DA2. The second sub-display area SD2 can be displayed according to the full dark display mode.

In contrast, when the user performs an operation in the second display area DA2 of the electronic device 100, the second display area DA2 can be displayed according to the normal display mode. The first display area DA1 can be displayed according to the full dark display mode.

Under some design requirements (in some embodiments), the second sub-display area SD2 adjacent to the second display area DA2 can be displayed according to the normal display mode, while the first sub-display area SD2 adjacent to the first display area DA1 The display area SD1 can be displayed according to the gradient mode. Or, under other design requirements (in other embodiments), at this time, the second sub-display area SD2 adjacent to the second display area DA2 may be displayed according to the gradient mode, but adjacent to the first display area DA1 The first sub-display area SD1 can be displayed according to the full-dark display mode.

In addition, when the user does not perform any operation on the electronic device 100, the first display area DA1, the second display area DA2, and the bendable display area BDA can all be displayed according to the dark display mode.

On the other hand, in the second operation mode, the electronic device 100 may be in an unfolded state, which means that the bendable display area BDA of the display panel 110 has not been bent. At this time, the first display area DA1 and the second display area DA2 of the electronic device 100 may be in a horizontal state with each other. For example, in the second operation mode, the active surface AS1 of the first display area DA1 and the active surface AS2 of the second display area DA2 may be facing the first direction D1 (or the second direction D2) together, and the first display area The non-active surface NAS1 of DA1 and the non-active surface NAS2 of the second display area DA2 may jointly face the second direction D2 (or the first direction D1).

It is worth mentioning that in the second operation mode, when the user performs an operation on the electronic device 100, the first display area DA1, the second display area DA2, and the bendable display area BDA can all be performed according to the normal display mode. To display. relatively, When the user does not perform any operation on the electronic device 100, the first display area DA1, the second display area DA2, and the bendable display area BDA can all be displayed according to the black display mode.

FIG. 2 is a circuit block diagram of the electronic device 100 shown in the embodiment of FIG. 1 according to the present invention. Please refer to FIG. 2, in this embodiment, the electronic device 100 includes a display panel 110, a sensor 120, a controller 130 and a driver 140. The sensor 120 is coupled to the display panel 110 to sense that the display panel 110 is operated in the first operation mode or the second operation mode. Moreover, the sensor 120 can generate a corresponding sensing result SR according to the operation action of the display panel 110. The sensor 120 of this embodiment may be, for example, a capacitive sensor, a light sensor or a pressure sensor, but the invention is not limited to this.

The controller 130 is coupled to the sensor 120 to receive the sensing result SR. In addition, the controller 130 may additionally receive an indication signal IS used to indicate whether the display panel 110 needs to perform a display action. In this embodiment, the controller 130 can generate the corresponding control signal CS according to the sensing result SR and the indication signal IS.

The driver 140 is coupled between the display panel 110 and the controller 130. The driver 140 can receive the control signal CS, and generate a driving signal DS to the display panel 110 according to the control signal CS, so as to drive the display panel 110 to perform operation actions.

For a detailed description of the display panel 110 shown in FIG. 1 and FIG. 2, please refer to FIG. 3. FIG. 3 is a schematic diagram of the display panel 110 shown in the embodiment of FIG. 1 and FIG. 2 according to the present invention. In this embodiment, the display panel 110 has a first display surface DA1, a second display surface DA2, and a bendable display area BDA. Flexible display area BDA can be It is arranged between the first display surface DA1 and the second display surface DA2. In addition, the bendable display area BDA has a first sub-display area SD1 and a second sub-display area SD2.

Furthermore, the bendable display area BDA can divide the first sub-display area SD1 and the second sub-display area SD2 according to the partition axis L1. Wherein, the first sub-display area SD1 is adjacent to the first display surface DA1, and the second sub-display area SD2 is adjacent to the second display surface DA2. Wherein, the partition axis L1 of this embodiment can be used as the center axis of the display panel 110.

Regarding the implementation details of the electronic device 100, please refer to FIG. 2, FIG. 3 and FIG. 4 at the same time. FIG. 4 is an operation flowchart of the electronic device 100 shown in the embodiment of FIG. 2 according to the present invention. In step S410, the user can activate the electronic device 100 to perform related operations. Then, in step S420, the sensor 120 may start to sense the operating state of the display panel 110 (for example, operating in the first operating mode or the second operating mode).

When the sensor 120 senses that the display panel 110 is operating in the second operation mode in step S420 (that is, the bendable display area BDA of the display panel 110 is not in a bent state), the electronic device 100 can continue to execute The operation action of step S430. In step S430, the sensor 120 may generate a sensing result SR indicating that the display panel 110 is operating in the second operation mode to the controller 130. Moreover, when the user performs an operation on the display panel 110, it means that the display panel 110 needs to perform a display operation. At this time, the controller 130 can generate a corresponding control signal CS to the driver 140 according to the sensing result SR and the indication signal IS.

Then, in step S440, the driver 140 can follow the control signal CS, and the first display area DA1, the second display area DA2, and the bendable display area BDA of the display panel 110 are displayed according to the normal display mode through the driving signal DS.

In other words, when the electronic device 100 is in an unfolded state and the user performs an operation on the display panel 110, the driver 140 can make the first display area DA1, the second display area DA2, and the bendable area of the display panel 110 through the driving signal DS. The folded display area BDA normally displays the display screen corresponding to the operation action.

On the other hand, when the sensor 120 senses that the display panel 110 is operating in the first operation mode (that is, the bendable display area BDA of the display panel 110 is in a bent state) in step S420, the electronic device 100 The operation action of step S450 can be successively performed. In step S450, the sensor 120 may generate a sensing result SR indicating that the display panel 110 is operating in the first operation mode to the controller 130.

Then, in step S460, the controller 130 will further determine whether the display panel 110 needs to perform a display action according to the sensing result SR and the indication signal IS. For example, assuming that the user does not perform an operation on the display panel 110 at this time, it means that the display panel 110 does not need to perform a display operation. In this case, the controller 130 may receive the indication signal IS indicating that the display panel 110 is not performing a display action. Therefore, the controller 130 can generate a corresponding control signal CS to the driver 140 according to the indication signal IS and the sensing result SR, and the electronic device 100 can continue to perform the operation of step S470.

In contrast, if the user performs an operation on the display panel 110 at this time, it means that the display panel 110 needs to perform a display operation. In this case, the controller 130 may receive an instruction signal IS that instructs the display panel 110 to perform a display action. Therefore, the controller 130 can generate a corresponding control signal CS to the driver 140 according to the indication signal IS and the sensing result SR, and the electronic device 100 can continue to perform the operation of step S480.

In step S470, since the display panel 110 does not need to perform a display operation at this time, the driver 140 can use the driving signal DS to enable the first display panel 110 to perform a display operation according to the control signal CS indicating that the display panel 110 is not performing a display operation. The display area DA1, the second display area DA2, and the bendable display area BDA are displayed according to the full dark display mode.

In step S480, since the display panel 110 needs to perform a display operation at this time, in the first operation mode, the driver 140 can perform a display operation on the display panel 110 according to the control signal CS instructing the display panel 110 to perform a display operation. The display panel 110 performs various display settings.

For example, suppose the user is performing an operation on the first display area DA1. At this time, the driver 140 can make the first display area DA1 display according to the normal display mode through the driving signal DS, and make the second display area DA2 is displayed according to the full dark display mode. At the same time, under some design requirements (in some embodiments), the driver 140 can make the first sub-display area SD1 display according to the normal display mode through the driving signal DS, and make the second sub-display area SD2 display according to the gradient mode To display. Or, under other design requirements (in other embodiments), the driver 140 can also use the driving signal DS to display the first sub-display area SD1 according to the gradient mode, and make the second sub-display area SD2 display according to the Full dark display mode comes To display.

In contrast, assuming that the user performs an operation on the second display area DA2, at this time, the driver 140 can make the second display area DA2 display according to the normal display mode through the driving signal DS, and make the first display area DA1 The display is performed according to the full dark display mode. At the same time, under some design requirements (in some embodiments), the driver 140 can make the second sub-display area SD2 display according to the normal display mode through the driving signal DS, and make the first sub-display area SD1 display according to the gradient mode To display. Or, under other design requirements (in other embodiments), the driver 140 can also use the driving signal DS to display the second sub-display area SD2 according to the gradient mode, and make the first sub-display area SD1 display according to the Full dark display mode to display.

For the implementation details of the display method of the display panel 110 in step S480, please refer to FIGS. 5A and 5B at the same time. FIGS. 5A and 5B are schematic diagrams illustrating the gradation mode according to an embodiment of the present invention. 5A is a schematic diagram of the display state of the display panel 110 when the electronic device 100 is operating in the first operation mode, and assuming that the user performs an operation on the first display area DA1, and FIG. 5B is the electronic device 100 A schematic diagram of the context of the display state of the display panel 110 when operating in the first operating mode and assuming that the user performs an operating action on the second display area DA2.

Specifically, as shown in FIGS. 5A and 5B, in the bendable display area BDA of the display panel 110, the first sub-display area SD1 and the second sub-display area SD2 respectively have a first display row DC1 and a plurality of second The second display line is DC21~DC2N. its Where N is a positive integer greater than 1. In addition, the display lines DC1, DC21~DC2N can respectively generate display images with different gray levels according to the setting of different driving signals. Incidentally, in the embodiment of FIG. 5A and FIG. 5B, the first display line DC1 may be adjacent to the partition axis L1.

In the scenario of FIG. 5A, the first display area DA1 and the first sub-display area SD1 can be displayed according to the normal display mode (presented in a non-dotted display mode), and the second display area DA2 can be displayed according to the full dark display mode (Presented in full black) to display. At the same time, the second sub-display area SD2 can be performed according to the gradient mode (presented in different degrees of black dots, where the denser the black dots indicate the lower the grayscale value, and vice versa, the higher the grayscale value). display.

Regarding the display mode of the second sub-display area SD2 in the gradation mode, in detail, in this embodiment, the driver 140 may first set the first display line DC1 of the second sub-display area SD2 to generate the second sub-display area SD2 through the driving signal DS. A display screen A1. Wherein, the gray scale value of the first display screen A1 at this time can be set according to the gray scale of the display screen of the adjacent first sub-display area SD1.

Then, in the direction toward the second display area DA2, the driver 140 again sets the second display lines DC21~DC2N to sequentially decrease the brightness (or gray level) of the first display screen A1 to generate a plurality of second displays Picture A21~A2N.

Incidentally, in this embodiment, in the direction from the partition axis L1 toward the second display area DA2, the display images generated by each adjacent display line can be sequentially based on a preset gray scale value. Decrease. Wherein, the preset grayscale value may be, for example, 5, but the present invention is not limited to this.

For example, suppose that the driver 140 first sets the display line DC1 of the second sub-display area SD2 to generate a display image A1 with a gray-level value of 150 according to the gray level of the display image of the first sub-display area SD1 and through the driving signal DS. . Then, the driver 140 can set the display line DC21 of the second sub-display area SD2 to generate a display screen A21 with a grayscale value of 145 through the driving signal DS. In contrast, the driver 140 can also set the display line DC22 of the second sub-display area SD2 to generate a display screen A22 with a grayscale value of 140 through the drive signal DS, and display images A23~A2N generated by the remaining display lines DC23~DC2N It can be deduced by analogy, and until the display line DC2N adjacent to the second display area DA2 produces a display screen A2N with a grayscale value of 0.

On the other hand, in the context of FIG. 5B, the second display area DA2 and the second sub-display area SD2 can be displayed according to the normal display mode (presented in a non-dotted representation), and the first display area DA1 can be displayed according to Full dark display mode (presented in a full black display) for display. At the same time, the first sub-display area SD1 can be performed according to the gradient mode (presented in different degrees of black dots, where the denser the black dots indicate the lower the grayscale value, and vice versa, the higher the grayscale value). display.

Regarding the display mode of the first sub-display area SD1 in the gradient mode, in detail, in this embodiment, the driver 140 may first set the first display row DC1 of the first sub-display area SD1 to generate the first display line DC1 through the driving signal DS. A display screen A1. Wherein, the gray scale value of the first display screen A1 at this time can be set according to the gray scale of the display screen of the adjacent second sub-display area SD2.

Then, in the direction toward the first display area DA1, the driver 140 will again set these second display lines DC21~DC2N to sequentially decrease the first display image. The brightness (or gray level) of A1 is used to generate a plurality of second display frames A21-A2N.

For example, suppose that the driver 140 first sets the display line DC1 of the first sub-display area SD1 to generate a display image A1 with a gray-level value of 150 according to the gray level of the display image of the second sub-display area SD2 and through the driving signal DS. . Then, the driver 140 can set the display line DC21 of the first sub-display area SD1 to generate a display screen A21 with a gray scale value of 145 through the driving signal DS. In contrast, the driver 140 can set the display line DC22 of the first sub-display area SD1 to generate a display screen A22 with a grayscale value of 140 through the drive signal DS, and the display screens A23~A2N generated by the remaining display lines DC23~DC2N can be And so on, and until the display line DC2N adjacent to the first display area DA1 generates a display screen A2N with a grayscale value of 0.

6A and 6B are schematic diagrams illustrating the situation of the gradient mode according to another embodiment of the present invention. 6A is a schematic diagram of the display state of the display panel 110 when the electronic device 100 is operating in the first operation mode, and assuming that the user performs an operation on the first display area DA1, and FIG. 6B is the electronic device 100 A schematic diagram of the context of the display state of the display panel 110 when operating in the first operating mode and assuming that the user performs an operating action on the second display area DA2.

In this embodiment, the first display row DC1 may be adjacent to the first display area DA1 or the second display area DA2. Specifically, in the context of FIG. 6A, the first display area DA1 can be displayed according to the normal display mode (presented in a non-dotted display mode), and the second display area DA2 and the second sub-display area SD2 can be displayed according to Full dark display mode (presented in a full black display) for display. At the same time, the first sub-display area SD1 can be displayed in accordance with the gradient mode (in the representation of different degrees of black dots). Now, among them, the denser the black dots indicate the lower the grayscale value, and vice versa, the higher the grayscale value) for display.

Regarding the display mode of the first sub-display area SD1 in the gradient mode, in detail, in this embodiment, the driver 140 may first set the first display row DC1 of the first sub-display area SD1 to generate the first display line DC1 through the driving signal DS. A display screen A1. Wherein, the gray scale value of the first display screen A1 at this time can be set according to the gray scale of the display screen of the adjacent first display area DA1.

Then, in the direction toward the partition axis L1, the driver 140 will again set the second display lines DC21~DC2N to sequentially decrease the brightness (or gray level) of the first display screen A1 to generate a plurality of second display screens A21 ~A2N.

For example, suppose that the driver 140 first sets the display row DC1 of the first sub-display area SD1 to generate a display image A1 with a gray level of 150 according to the gray level of the display image of the first display area DA1 and through the driving signal DS. Then, the driver 140 can set the display line DC21 of the first sub-display area SD1 to generate a display screen A21 with a gray scale value of 145 through the driving signal DS. In contrast, the driver 140 can also set the display line DC22 of the first sub-display area SD1 to generate a display screen A23 with a grayscale value of 140 through the drive signal DS, and display images A23~A2N generated by the remaining display lines DC23~DC2N It can be deduced by analogy, and until the display line DC2N adjacent to the partition axis L1 produces a display screen A2N with a grayscale value of 0.

On the other hand, in the scenario of FIG. 6B, the second display area DA2 can be displayed according to the normal display mode (presented in a non-dotted display mode), and the first display area DA1 and the first sub-display area SD1 can be displayed according to Full dark display mode (in full The black representation is presented) to display. At the same time, the second sub-display area SD2 can be performed according to the gradient mode (presented in different degrees of black dots, where the denser the black dots indicate the lower the grayscale value, and vice versa, the higher the grayscale value). display.

Regarding the display mode of the second sub-display area SD2 in the gradient mode, refer to the related descriptions of FIG. 5A, FIG. 5B and FIG. 6A for analogy, so it will not be repeated here.

According to the description of the two settings of the display state of the bendable display area BDA in FIG. 5A, FIG. 5B, and FIG. 6A, and FIG. 6B, it can be known that when the electronic device 100 is operating in the first operation mode, the driver 140 can be driven by The signal DS causes one of the first sub-display area SD1 and the second sub-display area SD2 of the bendable area BDA to be displayed according to the gradient mode, and causes the first sub-display area SD1 and the second sub-display area SD2 to display The other one is displayed according to the normal display mode or the full dark display mode. In this way, when the electronic device 100 is operated in the folded state (that is, the bendable display area BDA of the display panel 110 is bent), the bendable display area BDA is less prone to the problem of the difference in brightness and darkness. This effectively reduces the sensitivity of the human eye to the bendable display area BDA.

For the implementation details of the driver 140 setting the display state of the first sub-display area SD1 or the second sub-display area SD2, please refer to FIG. 7. FIG. 7 is a view of the first sub-display area SD1 and the second sub-display area SD2 according to the present invention. The circuit diagrams of the pixel circuits 700 in the rows DC1, DC21 to DC2N are shown.

Please refer to FIGS. 5A to 7 at the same time. In this embodiment, each display line DC1, DC21~DC2N may include a plurality of pixel circuits (eg, pixel circuit 700). Among them, these pixel circuits can be arranged in a matrix. and, The driver 140 can perform related settings on the pixel circuit 700 through the driving signal DS, so that the corresponding display lines DC1, DC21~DC2N can generate display images A1, A21~A2N with different brightness (or gray scale).

Specifically, in FIG. 7, the pixel circuit 700 includes transistors M1 to M9, a capacitor CST, and a light-emitting element OLED. The transistors M1 to M9 can be implemented by, for example, P-type transistors, but the present invention is not limited to this.

Specifically, the first terminal of the transistor M1 receives the data voltage VDATA, and the control terminal of the transistor M1 receives the control signal S2. The first terminal of the transistor M2 receives the reference voltage VP, and the second terminal of the transistor M2 is coupled to the second terminal of the transistor M1. The control terminal of the transistor M3 receives the control signal S2. The capacitor CST is coupled to the second end of the transistor M1 and the first end of the transistor M3. The first end of the transistor M4 is coupled to the second end of the transistor M3, and the control end of the transistor M4 receives the control signal S2. The first end of the transistor M5 is coupled to the system high voltage OVDD, the second end of the transistor M5 is coupled to the second end of the transistor M4, and the control end of the transistor M5 is coupled to the capacitor CST. The first terminal of the transistor M6 receives the reference voltage VN, the second terminal of the transistor M6 is coupled to the second terminal of the transistor M3, and the control terminal of the transistor M6 receives the control signal S1.

On the other hand, the first end of the transistor M7 receives the control signal S1, the second end of the transistor M7 is coupled to the first end of the transistor M8, and the control end of the transistor M7 is coupled to the control end of the transistor M8, And jointly receive the control signal S1. The anode end of the light emitting element OLED is coupled to the second end of the transistor M8, and the cathode end of the light emitting element OLED is coupled to the system low voltage OVSS. The first end of the transistor M9 is coupled to the transistor The second end of the M4, the second end of the transistor M9 is coupled to the anode end of the light-emitting element OLED, and the control end of the transistor M9 receives the light-emitting signal EM.

In detail, under some design requirements (in some embodiments), in the first sub-display area SD1 or the second sub-display area SD2 of the display panel 110 for displaying according to the gradient mode, the driver 140 may be in the pixel circuit When 700 is operating in the light-emitting phase, the driving signal DS is used to set the enable time of the light-emitting signal EM of the pixel circuit 700 to adjust the light-emitting time of the pixel circuit 700 and determine the light-emitting brightness of the pixel circuit 700. Wherein, when the light-emitting time of the pixel circuit 700 is relatively long, it means that the light-emitting brightness of the pixel circuit 700 is relatively bright, and when the light-emitting time of the pixel circuit 700 is relatively short, it means that the light-emitting brightness of the pixel circuit 700 is relatively Darker.

In other words, in this embodiment, the driver 140 can adjust the light-emitting time of each pixel circuit in each display line DC1, DC21~DC2N to make the corresponding display lines DC1, DC21~DC2N produce different brightness (or (Gray level) display screen A1, A21~A2N.

In this way, since the present embodiment can adjust the length of the light-emitting time of each pixel circuit 700 to achieve different levels of light-emitting brightness of the pixel circuit 700, therefore, the control method of the overall circuit can be simpler. In addition, this embodiment does not need to adjust the light-emitting brightness of the pixel circuit 700 through the AC data voltage VDATA, but uses the DC data voltage VDATA to perform related actions, thereby achieving the effect of power saving.

On the other hand, under other design requirements (in other embodiments), the first sub-display area SD1 or the second sub-display area SD2 of the display panel 110 is based on the gradient Under the layer mode display, the driver 140 can set the reference voltage VP of the pixel circuit 700 through the driving signal DS when the pixel circuit 700 is operating in the light-emitting phase, so as to adjust the light-emitting brightness of the pixel circuit 700.

Furthermore, when the pixel circuit 700 is operating in the light-emitting phase, the pixel circuit 700 can enable (for example, a low voltage level) the light-emitting signal EM. At this time, the conduction current ID flowing through the light-emitting element D can be as follows The sub-display: ID=K(VDATA-VP)^2

Among them, the above ID is the current value of the conduction current ID; K is the process parameter of the transistor M5; VDATA is the voltage value of the data voltage VDATA; VP is the voltage value of the reference voltage VP.

According to the above formula, when the voltage value of the data voltage VDATA is a fixed value, when the driver 140 increases the voltage value of the reference voltage VP through the driving signal DS, the current value of the conduction current ID will follow. Decrease, which in turn makes the light-emitting brightness of the pixel circuit 700 relatively dark. In contrast, when the driver 140 reduces the voltage value of the reference voltage VP through the driving signal DS, the current value of the on-current ID will increase accordingly, thereby making the pixel circuit 700 relatively brighter.

In other words, in this embodiment, the driver 140 can adjust the voltage level of the reference voltage VP of each pixel circuit in each display line DC1, DC21~DC2N, so that the corresponding display lines DC1, DC21~DC2N can produce different brightness. (Or gray level) display screen A1, A21~A2N.

Therefore, since this embodiment can adjust the reference voltage of each pixel circuit The voltage level of the voltage VP can be used to achieve different levels of light-emitting brightness of the pixel circuit 700. Therefore, the control method of the overall circuit can be simpler. In addition, this embodiment does not need to adjust the light-emitting brightness of the pixel circuit 700 through the AC data voltage VDATA, but uses the DC data voltage VDATA to perform related actions, thereby achieving the effect of power saving.

It is worth mentioning that under other design requirements (in other embodiments), the driver 140 can set the enable time of the light-emitting signal EM and the voltage of the reference voltage VP when the pixel circuit 700 is operating in the light-emitting phase. Size to adjust the brightness of the pixel circuit 700.

For example, the driver 140 may first set the enable time of the light-emitting signal EM of the pixel circuit 700 through the driving signal DS to adjust the length of the light-emitting time of the pixel circuit 700, thereby adjusting the light-emitting brightness of the pixel circuit 700. Then, when the light-emitting time of the pixel circuit 700 is less than a predetermined time, the pixel circuit 700 can further set the reference voltage VP of the pixel circuit 700 through the driving signal DS to adjust the light-emitting brightness of the pixel circuit 700 . The preset time may be 20% of a display time interval of the pixel circuit 700, but the present invention is not limited to this.

In other words, in this embodiment, the driver 140 can set the enable time of the light-emitting signal EM and the voltage level of the reference voltage VP to make the corresponding display lines DC1, DC21~DC2N produce different brightness (or gray scale) displays. Screen A1, A21~A2N.

Therefore, when the light-emitting time of the pixel circuit 700 is too short, it is easy to manufacture Therefore, under the setting of this embodiment, the display image displayed in the first sub-display area SD1 or the second sub-display area SD2 can effectively achieve a stable gradation effect.

FIG. 8 is a circuit block diagram of a driver 840 according to another embodiment of the present invention. Please refer to FIG. 2 and FIG. 8 at the same time. What is different from the embodiment in FIG. 2 is that in this embodiment, the driver 840 may further include a memory 850. Wherein, the memory 850 may be built in the drive 840, or in other embodiments, the memory 850 may also be externally connected to the drive 840 and coupled to the drive 840. Among them, the memory 850 can be used to store a plurality of gradient pictures PIC.

Specifically, referring to FIG. 2, FIG. 4, and FIG. 8 at the same time, when the electronic device 100 operates in step S480, the driver 140 randomly selects one of the gradient pictures PIC from the memory 850 according to the control signal CS , As the selected gradient picture SPIC. Then, the driver 140 may provide the selected gradient image SPIC to the display panel 100, so that one of the first sub-display area SD1 and the second sub-display area SD2 is in the gradient mode to display the selected gradient image SPIC. In this way, the display images generated by the first sub-display area SD1 and the second sub-display area SD2 can be more beautiful, and the sensitivity of the human eye to the bendable display area BDA is further reduced.

FIG. 9 is a flowchart of a display method according to an embodiment of the invention. In this embodiment, the display method is suitable for a display panel having a first display area, a second display area, and a bendable display area, wherein the bendable display area is disposed between the first display area and the second display area. between. In step S910, the driver 140 is provided to generate the driving signal DS to the display panel 110 according to the control signal CS. In step S920, in In the first operation mode in which the first display area DA1 and the second display area DA2 overlap each other, the driver 140 is caused to make one of the first sub-display area SD1 and the second sub-display area SD2 of the bendable display area BDA through the driving signal DS One is displayed according to the gradient mode, and the other of the first sub-display area SD1 and the second sub-display area SD2 is displayed according to the normal display mode or the full dark display mode.

The implementation details of each step are described in detail in the foregoing embodiments and implementation manners, and will not be repeated here.

In summary, the display methods described in the embodiments of the present invention can make the driver transmit the driving signal to make the second bendable area of the display panel in the first operation mode where the first display area and the second display area overlap each other. One of a sub-display area and a second sub-display area is displayed according to the gradient mode, and the other of the first sub-display area and the second sub-display area is displayed according to the normal display mode or the full dark display mode . In this way, when the bendable display area is bent, the bendable display area is less prone to the problem of difference in brightness and darkness, thereby effectively reducing the sensitivity of the human eye to the bendable display area.

S910, S920: steps

Claims (13)

A display method suitable for a display panel having a first display area, a second display area and a bendable display area, wherein the bendable display area is arranged in the first display area and the second display area In between, the display method includes: Providing a driver to generate a driving signal to the display panel according to a control signal; and In a first operation mode in which the first display area and the second display area overlap each other, the driver is made to make a first sub-display area and a second sub-display area of the bendable display area through the drive signal One of them is displayed according to a gradient mode, and the other of the first sub-display area and the second sub-display area is displayed according to a normal display mode or a full dark display mode. The display method according to claim 1, wherein the first sub-display area is adjacent to the first display area, and the second sub-display area is adjacent to the second display area. The display method according to claim 1, wherein the display method further includes: In the first operation mode, an active surface of the first display area faces a first direction, and an active surface of the second display area faces a second direction, wherein the first direction and the second direction The direction is opposite. The display method according to claim 1, wherein the display method further includes: In the first operation mode, one of the first display area and the second display area is displayed according to the full dark display mode. The display method according to claim 1, wherein the display method further includes: Providing a sensor to sense that the display panel is operated in the first operating mode or a second operating mode, and enabling the sensor to generate a corresponding sensing result; and A controller is provided to generate the control signal to the driver according to the sensing result. The display method according to claim 5, wherein a step is provided for the sensor to sense that the display panel is operated in the first operation mode or the second operation mode, and to cause the sensor to generate the corresponding sensing result include: When the sensing result indicating that the display panel is operating in the first operation mode is generated, the controller is made to determine whether the display panel performs a display action according to the sensing result and an indication signal, so that the controller generates a corresponding The control signal; and When the sensing result indicating that the display panel is operated in the second operation mode is generated, the driver is made to make the first display area, the second display area, and the bendable display area according to the driving signal through the drive signal. Display in normal display mode. The display method according to claim 6, wherein the first operation mode is that the bendable display area is bent, and the second operation mode is that the bendable display area is not bent. The display method according to claim 6, wherein when the sensing result indicating that the display panel is operating in the first operation mode is generated, the controller is caused to determine whether the display panel is The step of performing a display action so that the controller generates the corresponding control signal includes: When the control signal indicating that the display panel performs a display action is generated, the driver is caused to make one of the first sub-display area and the second sub-display area of the bendable display area according to the control signal according to the control signal Display in a gradient mode, and cause the other of the first sub-display area and the second sub-display area to display according to the normal display mode or the all-dark display mode; and When the control signal indicating that the display panel is not performing a display action is generated, the driver is caused to perform the first display area, the second display area, and the bendable display area according to the full dark display mode according to the control signal display. The display method according to claim 1, wherein the first sub-display area and the second sub-display area each have a plurality of display lines, and the first display area and the second display area overlap each other in the first display area. In the operation mode, the step of enabling the driver to display one of the first sub-display area and the second sub-display area of the bendable display area according to the gradient mode through the driving signal includes: Set a first display line of the display lines to generate a first display image, and sequentially increase or decrease the brightness of the first display image to generate a plurality of second displays of the second display lines of the display lines Picture. The display method according to claim 9, wherein the first display line is adjacent to the first display area or the second display area. The display method according to claim 9, wherein the display method further includes: In the gradation mode, the driver is made to adjust at least one of the length of the light-emitting time of the pixel circuits corresponding to each display line and the magnitude of the reference voltage of each pixel circuit. The display method according to claim 1, wherein the display method further includes: Provide a memory to store multiple gradient pictures; and In the first operation mode, the driver is caused to randomly select one of the gradient pictures as the selected gradient picture according to the control signal, so that the first sub-display area of the bendable display area and the One of the second sub-display areas displays the selected gradient picture. The display method according to claim 1, wherein the display panel is a flexible display panel.

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