CN113990260A

CN113990260A - Mobile terminal, driving method thereof and driving chip

Info

Publication number: CN113990260A
Application number: CN202111128704.3A
Authority: CN
Inventors: 严斌; 毛春程; 尹帮实; 王东杰
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2022-01-28
Anticipated expiration: 2039-06-25
Also published as: CN110288946A; CN110288946B; WO2020259548A1; CN113990260B

Abstract

The application provides a mobile terminal and a driving method thereof, a display module and a driving chip, relates to the technical field of display, and is used for solving the problem of how to improve the light receiving quantity of an optical device and not influencing the display effect of an OLED display screen. The driving method of the mobile terminal comprises the following steps: the mobile terminal includes: the first sub-pixel includes a first light emitting device and a first driving circuit; the second sub-pixel includes a second light emitting device and a second driving circuit; the driving chip generates a first data voltage and a second data voltage which are matched with the initial gray scale data according to each initial gray scale data; the first data voltage is less than the second data voltage; the first driving circuit generates a first driving current in response to the first data voltage; the first light-emitting device emits light under the drive of the first drive current; the second driving circuit generates a second driving current in response to the second data voltage; the second light emitting device emits light under the drive of the second drive current.

Description

Mobile terminal, driving method thereof and driving chip

The application is a divisional application of an invention application with the application date of 2019, 25.06.25, the Chinese application number of 201910556576.9 and the invention name of 'a mobile terminal and a driving method thereof, a display module and a driving chip'.

Technical Field

The present application relates to the field of display technologies, and in particular, to a mobile terminal, a driving method thereof, and a driving chip.

Background

With the development of display technology, high-screen-ratio terminal equipment becomes a product type which is favored by consumers. The optical device needs to collect light rays on the side where the display surface of the terminal device is located, and the optical device needs to occupy a certain area on the display surface of the terminal device, so that the optical device becomes a main influence factor for limiting full-screen display of the terminal device.

For a terminal device including an organic light-emitting diode (OLED) display, since the OLED display is not completely opaque, in order to simplify the structure, an optical device is often disposed on the back of the OLED display, and a light receiving surface of the optical device faces the back of the OLED display. However, since the OLED display has a transmittance of only about 3% to 5%, when the optical device is disposed on the back surface of the OLED display, the performance of the optical device is affected due to a small amount of light incident on the optical device.

Therefore, how to increase the light receiving amount of the optical device when the optical device is disposed on the backlight surface of the OLED display panel without affecting the display effect of the OLED display panel becomes a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The embodiment of the application provides a mobile terminal, a driving method of the mobile terminal, a display module and a driving chip, and is used for solving the problems that how to improve the light receiving quantity of an optical device and the display effect of an OLED display screen is not affected.

In order to achieve the above purpose, the following technical solutions are adopted in this embodiment:

in a first aspect, a driving method of a mobile terminal is provided, where the mobile terminal includes: a first pixel array and a second pixel array; the first pixel array comprises a plurality of first sub-pixels; the second pixel array comprises a plurality of second sub-pixels; the pixel density of the first pixel array is greater than that of the second pixel array; the first sub-pixel comprises a first light emitting device and a first driving circuit electrically connected with the first light emitting device; the second sub-pixel comprises a second light emitting device and a second driving circuit electrically connected with the second light emitting device; the mobile terminal also comprises a driving chip electrically connected with the first driving circuit and the second driving circuit and a processing unit electrically connected with the driving chip; the driving method of the mobile terminal comprises the following steps: the processing unit sends a plurality of initial gray scale data to the driving chip; the driving chip generates a first data voltage and a second data voltage which are matched with the initial gray scale data according to each initial gray scale data; the first data voltage is less than the second data voltage; the first driving circuit generates a first driving current in response to the first data voltage; the first light-emitting device emits light under the drive of the first drive current; the second driving circuit generates a second driving current in response to the second data voltage; the second light emitting device emits light under the drive of the second drive current.

Optionally, the driving method of the mobile terminal further includes: the processing unit responds to a first brightness adjusting instruction sent by a user and generates a first brightness control signal; the first brightness adjustment instruction is an instruction to instruct the display brightness of the second sub-pixel to change according to a user operation; the driving chip responds to the first brightness control signal and generates a first data voltage and a third data voltage which are matched with the initial gray scale data according to each initial gray scale data; the third data voltage is greater than the second data voltage; the second driving circuit generates a third driving current in response to the third data voltage; the second light emitting device emits light under the drive of the third drive current.

Optionally, the driving method of the mobile terminal further includes: the processing unit responds to a second brightness adjusting instruction sent by a user and generates a second brightness control signal; the second brightness adjustment instruction is an instruction indicating that the display brightness of the first sub-pixel is changed according to a user operation; the driving chip responds to the second brightness control signal and generates a fourth data voltage and a second data voltage which are matched with the initial gray scale data according to each initial gray scale data; the fourth data voltage is less than the first data voltage; the first drive circuit generates a fourth drive current in response to the fourth data voltage; the first light emitting device emits light driven by the fourth driving current.

Optionally, the mobile terminal further comprises an ambient light detector electrically connected to the processing unit; the ambient light detector is used for detecting ambient light brightness and generating a third brightness adjusting instruction according to the ambient light brightness; the third brightness adjustment instruction is an instruction to instruct the display brightness of the first sub-pixel and the second sub-pixel to change according to the ambient light; the driving method of the mobile terminal further comprises the following steps: the processing unit responds to a third brightness adjusting instruction sent by the ambient light detector and generates a third brightness control signal; the driving chip responds to the third brightness control signal and generates a fifth data voltage and a sixth data voltage which are matched with the initial gray scale data according to each initial gray scale data; the fifth data voltage is less than the sixth data voltage; the first drive circuit generates a fifth drive current in response to the fifth data voltage; the second driving circuit generates a sixth driving current in response to the sixth data voltage; the first light-emitting device emits light under the drive of the fifth drive current; the second light emitting device emits light under the drive of the sixth drive current; the fifth data voltage is different from the first data voltage, and the sixth data voltage is different from the second data voltage.

Optionally, the amplification factor of the first data voltage when the first driving circuit responds to the first data voltage is smaller than the amplification factor of the second driving circuit responds to the second data voltage.

In a second aspect, a mobile terminal is provided, the mobile terminal comprising a first pixel array and a second pixel array; the first pixel array comprises a plurality of first sub-pixels; the second pixel array comprises a plurality of second sub-pixels; the pixel density of the first pixel array is greater than that of the second pixel array; the first sub-pixel comprises a first light emitting device and a first driving circuit electrically connected with the first light emitting device; the second sub-pixel comprises a second light emitting device and a second driving circuit electrically connected with the second light emitting device; the mobile terminal also comprises a driving chip electrically connected with the first driving circuit and the second driving circuit and a processing unit electrically connected with the driving chip; the processing unit is used for sending a plurality of initial gray scale data to the driving chip; the driving chip is used for generating a first data voltage and a second data voltage which are matched with the initial gray scale data according to each initial gray scale data; the first data voltage is less than the second data voltage; a first driving circuit for generating a first driving current in response to a first data voltage; a first light emitting device for emitting light driven by a first driving current; a second driving circuit for generating a second driving current in response to the second data voltage; and a second light emitting device for emitting light under the drive of the second drive current.

Optionally, the processing unit is further configured to generate a first brightness control signal in response to a first brightness adjustment instruction sent by a user; the first brightness adjustment instruction is an instruction to instruct the display brightness of the second sub-pixel to change according to a user operation; the driving chip is also used for responding to the first brightness control signal and generating a first data voltage and a third data voltage which are matched with the initial gray scale data according to each initial gray scale data; the third data voltage is greater than the second data voltage; a second driving circuit for generating a third driving current in response to the third data voltage; and a second light emitting device for emitting light under the drive of the third drive current.

Optionally, the processing unit is further configured to generate a second brightness control signal in response to a second brightness adjustment instruction sent by the user; the second brightness adjustment instruction is an instruction indicating that the display brightness of the first sub-pixel is changed according to a user operation; the driving chip is also used for responding to the second brightness control signal and generating a fourth data voltage and a second data voltage which are matched with the initial gray scale data according to each initial gray scale data; the fourth data voltage is less than the first data voltage; a first driving circuit further for generating a fourth driving current in response to the fourth data voltage; and a first light emitting device for emitting light driven by the fourth driving current.

Optionally, the mobile terminal further comprises an ambient light detector electrically connected to the processing unit; the ambient light detector is used for detecting ambient light brightness and generating a third brightness adjusting instruction according to the ambient light brightness; the third brightness adjustment instruction is an instruction to instruct the display brightness of the first sub-pixel and the second sub-pixel to change according to the ambient light; the processing unit is also used for responding to a third brightness adjusting instruction sent by the ambient light detector and generating a third brightness control signal; the driving chip is also used for responding to the third brightness control signal and generating a fifth data voltage and a sixth data voltage which are matched with the initial gray scale data according to each initial gray scale data; the fifth data voltage is less than the sixth data voltage; a first driving circuit further for generating a fifth driving current in response to a fifth data voltage; the first light-emitting device is also used for emitting light under the drive of the fifth drive current; a second driving circuit further for generating a sixth driving current in response to the sixth data voltage; a second light emitting device further for emitting light driven by the sixth driving current; the fifth data voltage is different from the first data voltage, and the sixth data voltage is different from the second data voltage.

Optionally, the amplification factor of the first data voltage by the first driving circuit is smaller than the amplification factor of the second data voltage by the second driving circuit.

In a third aspect, a display module is provided, which includes: a first pixel array and a second pixel array; the first pixel array comprises a plurality of first sub-pixels; the second pixel array comprises a plurality of second sub-pixels; the pixel density of the first pixel array is greater than that of the second pixel array; the first sub-pixel comprises a first light emitting device and a first driving circuit electrically connected with the first light emitting device; the second sub-pixel comprises a second light emitting device and a second driving circuit electrically connected with the second light emitting device; the display module further comprises a driving chip electrically connected with the first driving circuit and the second driving circuit; the driving chip is used for transmitting data voltage to the first driving circuit and the second driving circuit according to the initial gray scale data; the amplification factor of the first driving circuit to the data voltage is smaller than that of the second driving circuit to the data voltage.

In a fourth aspect, a driving method of a display module is provided, the display module including: a first pixel array and a second pixel array; the first pixel array comprises a plurality of first sub-pixels; the second pixel array comprises a plurality of second sub-pixels; the pixel density of the first pixel array is greater than that of the second pixel array; the first sub-pixel comprises a first light emitting device and a first driving circuit electrically connected with the first light emitting device; the second sub-pixel comprises a second light emitting device and a second driving circuit electrically connected with the second light emitting device; the display module further comprises a driving chip electrically connected with the first driving circuit and the second driving circuit; the driving method of the display module comprises the following steps: the driving chip transmits data voltage to the first driving circuit and the second driving circuit according to the initial gray scale data; the first drive circuit generates a first drive current in response to the data voltage; the first light-emitting device emits light under the drive of the first drive current; the second drive circuit generates a second drive current in response to the data voltage; the second light-emitting device emits light under the drive of the second drive current; the amplification factor of the first driving circuit to the data voltage is smaller than that of the second driving circuit to the data voltage.

In a fifth aspect, a driver chip is provided, which, in response to initial gray scale data and according to each initial gray scale data, generates a first data voltage and a second data voltage matching the initial gray scale data; the first data voltage is less than the second data voltage.

Optionally, the driving chip is further configured to generate a first data voltage and a third data voltage matched with the initial gray scale data according to each initial gray scale data in response to the first brightness control signal; the third data voltage is greater than the second data voltage.

Optionally, the driving chip is further configured to generate a fourth data voltage and a second data voltage matched with the initial gray scale data in response to the second brightness control signal and according to each initial gray scale data; the fourth data voltage is less than the first data voltage.

Optionally, the driving chip is further configured to generate a fifth data voltage and a sixth data voltage matched with the initial gray scale data according to each initial gray scale data in response to the third brightness control signal; the fifth data voltage is less than the sixth data voltage.

A sixth aspect provides a driver chip, configured to generate, in response to the initial gray-scale data and according to each initial gray-scale data, a seventh data voltage matched with the initial gray-scale data; the driving chip is also used for responding to the fourth brightness control signal and generating a seventh data voltage and an eighth data voltage which are matched with the initial gray scale data according to each initial gray scale data; the eighth data voltage is greater than the seventh data voltage.

In a seventh aspect, a mobile terminal is provided, comprising a processing unit; the processing unit is used for sending initial gray scale data; the display module is electrically connected with the processing unit.

An eighth aspect provides a mobile terminal comprising a processing unit; the processing unit is used for sending initial gray scale data; the driving chip of the fifth aspect electrically connected with the processing unit is also included.

A ninth aspect provides a mobile terminal comprising a processing unit; the processing unit is used for sending initial gray scale data; the device further comprises a driving chip as in the sixth aspect electrically connected with the processing unit.

A tenth aspect provides a driving method of a mobile terminal, the mobile terminal including a first pixel array and a second pixel array; the first pixel array comprises a plurality of first sub-pixels; the second pixel array comprises a plurality of second sub-pixels; the pixel density of the first pixel array is greater than that of the second pixel array; the first sub-pixel comprises a first light emitting device and a first driving circuit electrically connected with the first light emitting device; the second sub-pixel comprises a second light emitting device and a second driving circuit electrically connected with the second light emitting device; the mobile terminal also comprises a driving chip electrically connected with the first driving circuit and the second driving circuit and a processing unit electrically connected with the driving chip; the driving method of the mobile terminal comprises the following steps: the processing unit sends a plurality of initial gray scale data to the driving chip; the driving chip generates a seventh data voltage matched with the initial gray scale data according to each initial gray scale data; the first drive circuit and the second drive circuit both generate a seventh drive current in response to the seventh data voltage; the first light-emitting device and the second light-emitting device respectively emit light under the drive of a seventh drive current; the processing unit also responds to a fourth brightness adjusting instruction sent by the user to generate a fourth brightness control signal; the fourth brightness adjustment instruction is an instruction to instruct the display brightness of the second sub-pixel to change according to a user operation; the driving chip also responds to a fourth brightness control signal and generates a seventh data voltage and an eighth data voltage which are matched with the initial gray scale data according to each initial gray scale data; the eighth data voltage is greater than the seventh data voltage; the first drive circuit generates a seventh drive current in response to the seventh data voltage; the first light-emitting device emits light under the drive of the seventh drive current; the second driving circuit generates an eighth driving current in response to the eighth data voltage; the second light emitting device emits light under the drive of the eighth drive current.

In an eleventh aspect, there is provided a mobile terminal comprising a first pixel array and a second pixel array; the first pixel array comprises a plurality of first sub-pixels; the second pixel array comprises a plurality of second sub-pixels; the pixel density of the first pixel array is greater than that of the second pixel array; the first sub-pixel comprises a first light emitting device and a first driving circuit electrically connected with the first light emitting device; the second sub-pixel comprises a second light emitting device and a second driving circuit electrically connected with the second light emitting device; the mobile terminal also comprises a driving chip electrically connected with the first driving circuit and the second driving circuit and a processing unit electrically connected with the driving chip; the processing unit is used for sending a plurality of initial gray scale data to the driving chip; the driving chip is used for generating a seventh data voltage matched with the initial gray scale data according to each initial gray scale data; the first drive circuit and the second drive circuit both generate a seventh drive current in response to the seventh data voltage; the first light-emitting device and the second light-emitting device respectively emit light under the drive of a seventh drive current; the processing unit is also used for responding to a fourth brightness adjusting instruction sent by the user and generating a fourth brightness control signal; the fourth brightness adjustment instruction is an instruction to instruct the display brightness of the second sub-pixel to change according to a user operation; the driving chip is also used for responding to the fourth brightness control signal and generating a seventh data voltage and an eighth data voltage which are matched with the initial gray scale data according to each initial gray scale data; the eighth data voltage is greater than the seventh data voltage; a second drive circuit further for generating an eighth drive current in response to an eighth data voltage; the second light emitting device emits light under the drive of the eighth drive current.

In a twelfth aspect, there is provided a computer readable storage medium comprising computer instructions which, when run on a processor, cause the processor to perform the method of any one of the first or sixth aspects.

In a thirteenth aspect, a computer program product is provided, which when executed by a processor, performs the method of any one of the first or sixth aspects.

Drawings

Fig. 1 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application;

fig. 2a is a schematic diagram illustrating a region division of a display screen according to an embodiment of the present application;

FIG. 2b is a sub-pixel layout according to an embodiment of the present application;

fig. 2c is a schematic structural diagram of a pixel circuit according to an embodiment of the present disclosure;

fig. 2d is a driving timing diagram of a pixel circuit according to an embodiment of the present disclosure;

3 a-3 j are schematic diagrams illustrating the division of the display screen according to an embodiment of the present application;

fig. 4 is a layout diagram of a first pixel array and a second pixel array according to an embodiment of the present application;

fig. 5a is a schematic view illustrating an ambient light transmission manner according to an embodiment of the present disclosure;

fig. 5b is a schematic structural diagram of another mobile terminal provided in an embodiment of the present application;

fig. 6 is a schematic diagram of a driving method of a mobile terminal according to an embodiment of the present application;

fig. 7 is a schematic diagram of another driving method of a mobile terminal according to an embodiment of the present application;

fig. 8 is a schematic interface diagram of a mobile terminal according to an embodiment of the present application;

fig. 9 is a schematic diagram of a driving method of a mobile terminal according to an embodiment of the present application;

fig. 10 is a schematic diagram of a driving method of a mobile terminal according to an embodiment of the present application;

fig. 11 is a schematic diagram of a driving method of a mobile terminal according to an embodiment of the present application;

fig. 12 is a schematic interface diagram of another mobile terminal provided in an embodiment of the present application;

fig. 13 is a schematic diagram of a driving method of another mobile terminal according to an embodiment of the present application.

Reference numerals:

01-mobile terminal; 10-a display module; 101-a display screen; 11-a first subpixel; 110-a first pixel; 111-a first light emitting device; 112-a first driver circuit; 12-a second subpixel; 120-a second pixel; 121-a second light emitting device; 122-a second drive circuit; 13-a driver chip; 20-middle frame; 21-a processing unit; 30-a housing; 40-optical device.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

Further, in the present application, directional terms such as "upper" and "lower" are defined with respect to a schematically-disposed orientation of components in the drawings, and it is to be understood that these directional terms are relative concepts that are used for descriptive and clarity purposes and that will vary accordingly with respect to the orientation in which the components are disposed in the drawings.

In the present application, unless expressly stated or limited otherwise, the term "coupled" is to be construed broadly, e.g., "coupled" may be a fixed connection, a removable connection, or an integral part; may be directly connected or indirectly connected through an intermediate.

The embodiment of the application provides a mobile terminal. The mobile terminal can be a tablet personal computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook computer, a Personal Digital Assistant (PDA), a vehicle-mounted device, a network television, a wearable device, a television and other products with a display interface, and intelligent display wearing products such as an intelligent watch and an intelligent bracelet. The embodiment of the present application does not specifically limit the specific form of the mobile terminal. For convenience of description, the following embodiments are all exemplified by taking a mobile terminal as a mobile phone.

As shown in fig. 1, the mobile terminal 01 mainly includes a display module 10, a middle frame 20 and a housing 30.

The middle frame 20 is located on one side of the display module 10 close to the casing 30, and the display module 10 and the middle frame 20 are disposed in the casing 30.

The surface of the middle frame 20 away from the display module 10 is used for setting internal components such as a processing unit 21, and the main board 21 is used for sending image data to the display module 10, so that the display module 10 completes image display.

The display module 10 includes a display panel that can realize self-luminescence. The display screen may be an Organic Light Emitting Diode (OLED) display screen.

As shown in fig. 2a, the display panel 101 defines a display area a and a peripheral area B located at the periphery of the display area a.

The relative position relationship and the shape of the display area a and the peripheral area B are not limited, and in the embodiment of the present application, the peripheral area B surrounds the display area a for a circle.

As shown in fig. 1, the mobile terminal 01 further includes an optical device 40, where the optical device 40 is disposed on a side of the display module 10 close to the middle frame 20, that is, the optical device 40 is disposed on a backlight side of the display screen 101 opposite to the light-emitting surface. The optical device 40 may be disposed on a surface of the display module 10 close to the middle frame 20, that is, on a backlight surface of the display module 10 opposite to the display surface. The optical device 40 may also be disposed on the surface of the middle frame 20 close to the display module 10.

The light receiving surface of the optical device 40 faces the display screen 101. The optical device 40 is a component including a photosensor, among others. The optical device 40 may be, for example, a front camera, a fingerprint sensor, or the like.

It is understood that the mobile terminal 01 includes an optical device 40 that performs a specific function by collecting ambient light directed to the optical device 40 through the display screen 101. Whereas the display screen 101 is only transparent through the display area a, the orthographic projection of the optics 40 on the display screen 101 is located in the display area a of the display screen 101, as shown in fig. 2 a.

As shown in fig. 2b, the display area a includes a plurality of sub-pixels P. For convenience of description, the plurality of sub-pixels P are described as an example in a matrix arrangement.

It is to be understood that the shape of the sub-pixel P illustrated in the present application is only illustrative and not limiting.

At this time, the sub-pixels P arranged in a line in the horizontal direction X are referred to as sub-pixels in the same row, and the sub-pixels P arranged in a line in the vertical direction Y are referred to as sub-pixels in the same column.

In addition, a pixel driving circuit Q for controlling the QLED to display and a QLED electrically connected to the driving circuit Q are provided in the subpixel P.

Illustratively, as shown in fig. 2C, the driving circuit Q includes a capacitor C and a plurality of switching transistors (M1, M2, M3, M5, M6, M7) and a driving transistor M4.

It should be noted that the operation process of the driving circuit Q shown in fig. 2c includes three stages shown in fig. 2d, namely, a first stage, a second stage, and a third stage.

In the first phase (i), under the control of the first gate signal N-1, the transistor M1 and the transistor M7 are turned on in FIG. 2 c. The initial voltage Vint is transmitted to the gate (g) of the driving transistor M4 and the anode (a) of the OLED through the transistor M1 and the transistor M7, respectively. The purpose of resetting the anode a of the OLED and the gate g of the driving transistor M4 is achieved.

In the second stage, the transistor M2 and the transistor M3 are turned on under the control of the second gate signal N. When the transistor M3 is turned on, the gate g and the drain (d) of the driving transistor M4 are electrically connected, and the driving transistor M4 is in a diode-on state. At this time, the data voltage Vdata is written to the source(s) of the driving transistor M4 through the turned-on transistor M2, and compensates for the threshold voltage Vth of the driving transistor M4.

In the third stage, under the control of the emission control signal EM, the transistor M5 and the transistor M6 are turned on, and the current path between the voltages VDD and VSS is turned on. The driving transistor M4 is turned on, a first pole (source s) of the driving transistor M4 receives the voltage VDD, and a second pole of the driving transistor M4 is electrically connected to the anode (a) of the OLED. The cathode (c) of the OLED receives a voltage VSS. In this case, the driving transistor M4 generates the driving current I_sdThe current is transmitted to the OLED through the current path to drive the OLED to emit light.

With respect to the drive current I_sdThe calculation method of (2):

wherein W/L is a driving crystalWidth to length ratio, C, of body tube M4_OXμ is the channel carrier mobility, which is the dielectric constant of the channel insulating layer, and these several parameters are related to the structure of the driving circuit Q.

That is, the drive current I_sdThe magnitude of (b) is related to the data voltage Vdata transmitted to the driving circuit Q and the structure of the driving circuit Q. Wherein the width-to-length ratio W/L of the driving transistor M4, the channel carrier mobility μ, and the dielectric constant C of the channel insulating layer_OXThe product of the three can be called the amplification factor of the driving circuit Q to the data voltage Vdata.

Regarding the manner of calculating the light emission luminance L of the subpixel P:

L＝f*I_sd (2)

where f is the photoelectric conversion efficiency of the subpixel P.

Therefore, in the case that the photoelectric conversion efficiency f of the sub-pixel P is fixed, the display panel 101 provided in the embodiment of the present application can drive the driving current I of different sub-pixels P according to the requirement_sdIs adjusted to adjust the luminance L of the different sub-pixels P.

Since the voltage VSS received by the cathode (c) of the OLED in the mobile terminal is generally a fixed value, for example, ground. Therefore, as can be seen from the above formula (1), for example, the data voltage Vdata, the width-to-length ratio W/L of the driving transistor M4, the channel carrier mobility μ, or the dielectric constant C of the channel insulating layer can be adjusted_OXTo adjust the driving current I_sdThe size of (2).

In addition, in order to improve the lighting effect of the optical device 40, the detection accuracy of the optical device 40 is improved. In some embodiments, as shown in fig. 3 a-3 d, display area a includes a first display area a1 and a second display area a 2. The relative positional relationship and shape of the first display area a1 and the second display area a2 are not limited.

In some embodiments, as shown in fig. 3 a-3 d, the second display region a2 is located at one side of the first display region a 1.

In some embodiments, as shown in fig. 3 e-3 j, the first display region a1 surrounds the second display region a 2.

Wherein, the second display area a2 can be a pattern as shown in fig. 3 e-3 h; or may be a plurality of patterns as shown in fig. 3 i-3 j.

As shown in fig. 4, the first display area a1 is provided with a first pixel array including a plurality of first sub-pixels 11. The second display area a2 is provided with a second pixel array including a plurality of second sub-pixels 12.

The first subpixel 11 includes a first light emitting device 111 and a first driving circuit 112 electrically connected to the first light emitting device 111.

The second subpixel 12 includes a second light emitting device 121 and a second driving circuit 122 electrically connected to the second light emitting device 121.

In order to simplify the manufacturing process, the first light emitting device 111 and the second light emitting device 121 may have the same structure and may be simultaneously formed during the manufacturing process. That is, the photoelectric conversion efficiencies f of the first subpixel 11 and the second subpixel 12 are the same. In this example, the photoelectric conversion efficiency f of the first subpixel 11 is the same as that of the second subpixel 12.

However, as can be seen from the above, the driving circuit Q of the display panel 101 includes a plurality of transistors. That is, the first and

second driving circuits

112 and 122 include a plurality of transistors. The transistor is mainly made of a non-light-transmissive metal material, and plays a role in shielding light to a certain extent, and the light-transmissive area of the first sub-pixel 11 or the second sub-pixel 12 is affected.

Based on this, in order to improve the detection accuracy of the optical device 40, as shown in fig. 4, the pixel density of the first pixel array is made larger than the pixel density of the second pixel array.

Illustratively, as shown in fig. 4, three first sub-pixels 11 in the first pixel array constitute one first pixel 110, and the three first sub-pixels 11 are a red-emitting first sub-pixel, a green-emitting first sub-pixel, and a blue-emitting first sub-pixel, respectively. Three second subpixels 12 in the second pixel array constitute one second pixel 120, and the three second subpixels 12 are a red-emitting second subpixel, a green-emitting second subpixel, and a blue-emitting second subpixel, respectively.

Pixel density (PPI) refers to the number of pixels per inch of screen. The pixel density of the first pixel array is greater than that of the second pixel array, and it can be understood that the distance between adjacent first pixels 110 in the first pixel array is smaller than the distance between adjacent second pixels 120 in the second pixel array. That is, the number of the first pixels 110 disposed is greater than the number of the second pixels 120 within the same area.

The pixel density of the first display region a1 is greater than that of the second display region a2, and therefore, as shown in fig. 5a, the density of the first driving circuits 112 of the first display region a1 is greater than that of the second driving circuits 122 of the second display region a2, so that the number of transistors of the first display region a1 is greater than that of the second display region a 2. Based on this, the ambient light transmittance of the second display region a2 is greater than the ambient light transmittance of the first display region a 1.

Based on this, as shown in fig. 5a, the orthographic projection of the optical device 40 on the display screen 101 is located at the second display area a 2.

The greater the ambient light transmittance, the better the light collection effect of the optical device 40 and the better the working performance. Therefore, in the mobile terminal 01 provided by the present application, the optical device 40 is disposed on the side of the display screen 101 close to the middle frame 20, and if the orthographic projection of the optical device 40 on the display screen 101 is located in the second display area a2, the detection accuracy of the optical device can be better ensured.

Also, since the optical device 40 is located on the side of the display screen 101 close to the bezel 20, and the optical device 40 coincides with the position of the second display area a2, the optical device 40 does not need to occupy a part of the area in the display screen 101 alone. Thus, normal display of the display screen 101 can be ensured, the screen occupation ratio of the display area A is not affected, and the appearance effect can be improved. Moreover, the orthographic projection of the optical device 40 on the display screen 101 falls into the second display area a2, which can improve the light receiving rate of the optical device 40.

In addition, to realize the display, as shown in fig. 5b, the mobile terminal 01 further includes a driving chip 13 electrically connected to the first driving circuit 112 and the second driving circuit 122, and a processing unit 21 electrically connected to the driving chip 13.

The first driving circuit 112 and the second driving circuit 122 may be electrically connected to the driving chip 13 through a wire, for example. Since the driving chip 13 is located on the display screen 10 and the processing unit 21 is located on the middle frame 20, the driving chip 13 may be electrically connected to the processing unit 21 through a Flexible Printed Circuit (FPC), for example.

The Processing Unit 21 may be, for example, a Central Processing Unit (CPU) of the mobile terminal 01.

In the embodiment of the present application, since the pixel density of the first display region a1 is greater than that of the second display region a2, in order to make the display luminance of the first display region a1 and the display luminance of the second display region a2 close, the luminance difference between the first display region a1 and the second display region a2 is reduced by controlling the display luminance of the second sub-pixels 12 in the second display region a2 to be greater than that of the first sub-pixels 11 in the first display region a 1.

The manner of controlling the light emission luminance L1 of the first sub-pixel 11 in the first display region a1 and the light emission luminance L2 of the second sub-pixel 12 in the second display region a2 is exemplified below.

Example 1

From the above formula (2), the light-emitting luminance L1 and the first driving current I of the first subpixel 11_sd1In relation to the second driving current I, the luminance L2 of the second sub-pixel 12 is_sd2It is related. As can be seen from the above equation (1), the first driving current I_sd1The second driving current I is related to the first data voltage Vdata1_sd2Is associated with the second data voltage Vdata 2.

Based on this, the light emission luminance L1 of the first sub-pixel 11 and the light emission luminance L2 of the second sub-pixel 12 are controlled by adjusting the first data voltage Vdata1 and the second data voltage Vdata 2.

As an example, as shown in fig. 6, the driving method of the mobile terminal 01 may include S101 to S106:

s101, the processing unit 21 sends a plurality of initial gray-scale data to the driver chip 13.

The initial gray scale data herein refers to the original unprocessed gray scale data corresponding to the image to be displayed. The initial gray-scale data sent by the processing unit 21 to the driver chip 13 is gray-scale data when a certain frame of picture is displayed.

If the first subpixel 11 and the second subpixel 12 directly display the initial gray scale data, the pixel density of the first display area a1 is greater than that of the second display area a2, so that the brightness of the first display area a1 is greater than that of the second display area a2, which affects the display effect.

Based on this, the driving chip 13 generates a first data voltage Vdata1 and a second data voltage Vdata2 according to each initial gray-scale data S102.

In order to reduce the difference between the display luminance of the first sub-pixel 11 and the display luminance of the second sub-pixel 12 at the same gray scale, the first data voltage Vdata1 corresponding to the same initial gray scale data is smaller than the second data voltage Vdata 2.

The driving chip 13 is configured to generate a first data voltage Vdata1 and a second data voltage Vdata2 matched with the initial gray-scale data in response to the initial gray-scale data and according to each of the initial gray-scale data.

That is, the driving chip 13 processes all the received initial gray-scale data according to the first rule to generate the first data voltage Vdata1, and processes all the received initial gray-scale data according to the second rule to generate the second data voltage Vdata 2. For the initial gray-scale data transmitted to the first subpixel 11, the corresponding first data voltage Vdata1 is transmitted to the first driving circuit 112. For the initial gray-scale data transmitted to the second subpixel 12, the corresponding second data voltage Vdata2 is transmitted to the second driving circuit 122.

Illustratively, one first sub-pixel 11 in the first display region a1 displays a gray scale of 200, and one second sub-pixel 12 in the second display region a2 also displays a gray scale of 200. The 200 gray scales correspond to a first data voltage Vdata1 and a second data voltage Vdata2, respectively, and at this time, the driving chip 13 inputs the first data voltage Vdata1 to the first driving circuit 112 of the first subpixel 11 and inputs the second data voltage Vdata2 to the second driving circuit 122 of the second subpixel 12.

S103, the first driving circuit 112 responds to the first data voltage Vdata1 to generate a first driving current I_sd1And S105 is performed.

S104, the second driving circuit 122 responds to the second data voltage Vdata2 to generate a second driving current I_sd2And S106 is performed.

However, S104 is not limited to S103 after S104 is executed. The steps of S103 and S104 are performed in relation to the arrangement of the first sub-pixel 11 and the second sub-pixel 12.

It can be understood from the above formula (1) that the larger the data voltage Vdata, the larger the driving current I_sdThe larger. In this example, the first data voltage Vdata1 corresponding to the same initial gray-scale data is smaller than the second data voltage Vdata2 during the display process. Therefore, according to the above formula (1), the first driving current I is obtained under the same initial gray-scale data_sd1Less than the second drive current I_sd2. Further, as can be seen from the above formula (2), the light emission luminance L1 of the first subpixel 11 is smaller than the light emission luminance L2 of the second subpixel 12.

S105, the first light-emitting device 111 drives the current I at the first driving current_sd1Is driven to emit light.

S106, the second light emitting device 121 drives the current I at the second driving current_sd2Is driven to emit light.

Based on this, to realize the driving method of the mobile terminal 01 described above, the processing unit 21 of the mobile terminal 01 is configured to transmit a plurality of initial grayscale data to the driving chip 13.

The driving chip 13 of the mobile terminal 01 generates a first data voltage Vdata1 and a second data voltage Vdata2 according to each initial gray-scale data.

That is, after the processing unit 21 transmits the initial gray scale data to the driving chip 13, the driving chip 13 processes the initial gray scale data. An initial gray-scale data is generated corresponding to a first data voltage Vdata1 inputted to the first driving circuit 112 and a second data voltage Vdata2 inputted to the second driving circuit 122.

A first drive circuit 112 of the mobile terminal 01 for respondingGenerating a first driving current I at a first data voltage Vdata1_sd1。

And a second driving circuit 122 of the mobile terminal 01 for generating a second driving current in response to the second data voltage Vdata 2.

A first light emitting device 111 of the mobile terminal 01 for generating a first driving current I_sd1Is driven to emit light.

A second light emitting device 121 of the mobile terminal 01 for generating a second driving current I_sd2Is driven to emit light.

The mobile terminal 01 provided by the present application processes data of a picture to be displayed while ensuring normal display of the display screen 101 and improving the light receiving rate of the optical device 40. That is, when displaying a screen, the processing unit 21 receives the initial gray-scale data and transmits the initial gray-scale data to the driving chip 13. The driving chip 13 processes the initial gray scale data, and one initial gray scale data correspondingly generates a first data voltage Vdata1 input to the first driving circuit 112 and a second data voltage Vdata2 input to the second driving circuit 122, so that the first driving current I is generated when the same gray scale is displayed_sd1Less than the second drive current I_sd2So that the light emission luminance L2 of the second sub-pixel 12 is made larger than the light emission luminance L1 of the first sub-pixel 11.

Therefore, although the pixel density of the second display region a2 is less than that of the first display region a1, the light emission luminance of the second sub-pixels 12 in the second display region a2 is greater than that of the first sub-pixels 11 in the first display region a 1. Thus, by compensating the display brightness of the low-density second display area a2, the display brightness difference between the first display area a1 and the second display area a2 can be reduced to some extent, the display brightness of the first display area a1 and the display brightness of the second display area a2 can be fused with each other, the brightness difference at the boundary between the first display area a1 and the second display area a2 can be eliminated, and the display effect can be improved.

On this basis, in order to further adjust the light emission luminance of the first sub-pixel 11 in the first display area a1 and the second sub-pixel 12 in the second display area a2, the mobile terminal 01 is also used to individually adjust the light emission luminance of the second sub-pixel 12 in the second display area a 2.

As shown in fig. 7, the method for driving the mobile terminal 01 includes, in addition to S101 to S106: the following S201 to S206 are performed.

In a case where the processing unit 21 does not receive the first brightness adjustment instruction issued by the user, the mobile terminal 01 executes a default driving method as described above in S101 to S106.

After the processing unit 21 receives a first brightness adjustment instruction issued by the user, the following driving methods of S201 to S206 are executed: s201, the processing unit 21 sends a plurality of initial gray scale data to the driving chip 13; meanwhile, the processing unit 21 also generates a first brightness control signal in response to a first brightness adjustment instruction issued by the user; the first luminance adjustment instruction is an instruction to instruct the display luminance of the second sub-pixel 12 to be changed according to a user operation.

In order to execute the above S201, the processing unit 21 in the mobile terminal 01 is further configured to generate a first brightness control signal in response to a first brightness adjustment instruction issued by a user while sending the initial gray-scale data to the driving chip 13.

Regarding the issuance of the first brightness adjustment instruction, for example, the user may issue the first brightness adjustment instruction to the processing unit 21 by pressing a button on the mobile terminal 01. For example, a volume key is pressed, and a first brightness adjustment instruction is issued. If the volume up key is pressed, the first brightness adjustment command is a command to increase the display brightness of the second subpixel 12. If the volume down key is pressed, the first brightness adjustment command is a command to decrease the display brightness of the second subpixel 12.

For example, the user may send a brightness adjustment instruction to the processing unit 21 by touching a touch key on the display screen 101 of the mobile terminal 01. For example, as shown in fig. 8, a first brightness adjustment instruction is issued by sliding the brightness adjustment bar M on the display screen 101 corresponding to the second display area a 2. If the luminance bar is slid to the right, the first luminance adjustment command is a command to increase the display luminance of the second subpixel 12. If the luminance bar is slid to the left, the first luminance adjustment instruction is an instruction to decrease the display luminance of the second subpixel 12. The interface shown in fig. 8 may be invoked by sliding down from the top of the mobile terminal 01 or sliding up from the bottom of the mobile terminal 01, for example.

For example, the user may issue a brightness adjustment instruction to the processing unit 21 by voice. For example, if the term "bright" is included, the first brightness adjustment command is a command for increasing the display brightness of the second subpixel 12. If the term "two dark" is included, the first brightness adjustment command is a command to decrease the display brightness of the second subpixel 12.

S202, the driving chip 13 generates a first data voltage Vdata1 and a third data voltage Vdata3 matched with the initial gray scale data according to each initial gray scale data in response to the first luminance control signal, the first data voltage Vdata1, the third data voltage Vdata3, the first data voltage Vdata1, and the third data voltage Vdata 3.

Since the first brightness adjustment instruction is an instruction to instruct the display brightness of the second subpixel 12 to be changed according to a user operation, the driving chip 13 instructs only to change the display brightness of the second subpixel 12 after responding to the first brightness control signal, and does not change the display brightness of the first subpixel 11.

That is, when the driving chip 13 receives the first luminance control signal, a first data voltage Vdata1 and a third data voltage Vdata3 corresponding to the initial gray-scale data are generated according to each initial gray-scale data in response to the first luminance control signal without generating the second data voltage Vdata 2.

Also, since the user issues the first brightness control command only in case that the second display region a2 is not bright enough, the third data voltage Vdata3 generated by the driving chip 13 in response to the first brightness control signal is greater than the second data voltage Vdata2, so that the generated third driving current I is generated_sd3Is greater than the second drive current I_sd2To further adjust the display brightness of the second sub-pixel 12 in the second display area a 2.

Wherein, in order to perform the above S202, the driving chip 13 of the above mobile terminal 01 is further configured to generate a first data voltage Vdata1 and a third data voltage Vdata3 matching the initial gray-scale data according to each of the initial gray-scale data in response to the first luminance control signal; and inputs the third data voltage Vdata3 to the second driving circuit 122.

S203, the first driving circuit 112 generates a first driving current I in response to the first data voltage Vdata1_sd1Subsequently, S205 is performed.

S204, the second driving circuit 122 responds to the third data voltage Vdata3 to generate a third driving current I_sd3Subsequently, S206 is performed.

Wherein, to perform the above S204, the second driving circuit 122 is further configured to generate the third driving current I in response to the third data voltage Vdata3_sd3。

S205, the first light emitting device 111 drives the current I at the first driving current_sd1Is driven to emit light.

S206, the second light emitting device 121 drives the current at the third driving current_sd3Is driven to emit light.

Wherein, in order to perform the above S205, the second light emitting device 121 is further used for the third driving current_sd3Is driven to emit light.

In this way, the mobile terminal 01 may respond to the first brightness adjustment command and independently adjust the display brightness of the second display area a2 according to the first brightness adjustment command on the basis of having the default brightness adjustment function, so as to further reduce the display brightness difference between the first display area a1 and the second display area a2 and improve the display effect.

On this basis, in order to further adjust the light emission luminance of the first sub-pixel 11 in the first display area a1 and the second sub-pixel 12 in the second display area a2, the mobile terminal 01 is also used to individually adjust the light emission luminance of the first sub-pixel 11 in the first display area a 1.

As shown in fig. 9, the method for driving the mobile terminal 01 includes, in addition to S101 to S106, the steps of: the following S301 to S306 are executed.

In a case where the processing unit 21 does not receive the second brightness adjustment instruction issued by the user, the mobile terminal 01 executes a default driving method as described above in S101 to S106.

After the processing unit 21 receives a second brightness adjustment instruction issued by the user, the following driving methods of S301 to S306 are executed:

s301, the processing unit 21 sends a plurality of initial gray scale data to the driving chip 13; meanwhile, the processing unit 21 also generates a second brightness control signal in response to a second brightness adjustment instruction issued by the user; the second luminance adjustment instruction is an instruction to instruct the display luminance of the first subpixel 11 to be changed according to a user operation.

In order to execute the above S301, the processing unit 21 in the mobile terminal 01 is further configured to generate a second brightness control signal in response to a second brightness adjustment instruction issued by the user while sending the initial gray-scale data to the driving chip 13.

Regarding the issuance of the second brightness adjustment instruction, for example, the user may issue the second brightness adjustment instruction to the processing unit 21 by pressing a button on the mobile terminal 01. For example, pressing the volume key, a second brightness adjustment instruction is issued. If the volume up key is pressed, the second brightness adjustment command is a command to increase the display brightness of the first subpixel 11. If the volume down key is pressed, the second brightness adjustment instruction is an instruction to decrease the display brightness of the first subpixel 11.

For example, the user may send a brightness adjustment instruction to the processing unit 21 by touching a touch key on the display screen 101 of the mobile terminal 01. For example, as shown in fig. 8, a second brightness adjustment instruction is issued by sliding the brightness adjustment bar N on the display screen 101 corresponding to the second display area a 2. If the luminance bar is slid to the right, the second luminance adjustment command is a command to increase the display luminance of the first subpixel 11. If the luminance bar is slid to the left, the second luminance adjustment instruction is an instruction to decrease the display luminance of the first subpixel 11.

For example, the user may issue a brightness adjustment instruction to the processing unit 21 by voice. For example, if the word "bright" is included, the second brightness adjustment command is a command to increase the display brightness of the first sub-pixel 11. The second brightness adjustment command is a command to decrease the display brightness of the first sub-pixel 11 when the "dark" word is included.

S302, the driving chip 13 generates a fourth data voltage Vdata4 and a second data voltage Vdata2 matching the initial gray-scale data according to each of the initial gray-scale data in response to the second luminance control signal, the fourth data voltage Vdata4, the second data voltage Vdata2, the fourth data voltage Vdata4, the second data voltage Vdata 2.

It is understood that, since the second brightness adjustment instruction is an instruction to instruct the display brightness of the first sub-pixel 11 to be changed according to a user operation, the driving chip 13 instructs only to change the display brightness of the first sub-pixel 11 and does not change the display brightness of the second sub-pixel 12 after responding to the second brightness control signal.

Therefore, when the driving chip 13 receives the second luminance control signal, a fourth data voltage Vdata4 and a second data voltage Vdata2 matched with the initial gray-scale data are generated according to each initial gray-scale data without generating the first data voltage Vdata1 in response to the second luminance control signal.

Also, since the user issues the second brightness control command only in case that the first display region a1 is too bright, the fourth data voltage Vdata4 generated by the driving chip 13 in response to the second brightness control signal is less than the first data voltage Vdata1, so that the generated fourth driving current I is generated_sd4Less than the first drive current I_sd1In contrast, the display luminance of the first sub-pixel 11 in the first display region a1 is further adjusted.

Wherein, in order to perform the above S302, the driving chip 13 of the above mobile terminal 01 is further configured to generate a fourth data voltage Vdata4 and a second data voltage Vdata2 matching the initial gray-scale data according to each of the initial gray-scale data in response to the second brightness control signal; and inputs the fourth data voltage Vdata4 to the first driving circuit 112.

S303, the first driving circuit 112, in response to the fourth data voltage Vdata4, generates a fourth driving current, and performs S205.

Wherein, in order to perform the above S303, the first driving circuit 112 is further configured to generate a fourth driving current I in response to the fourth data voltage Vdata4_sd4。

S304, the second driving circuit 122 generates the second driving current in response to the second data voltage Vdata2, and performs S206.

S305, the first light emitting device 111 emits light under the driving of the fourth driving current.

Wherein, in order to perform the above S305, the first light emitting device 111 is exemplified to be further used for the fourth driving current I_sd4Is driven to emit light.

S306, the second light emitting device 121 emits light under the driving of the second driving current.

It is considered that when the light emission luminance of the sub-pixel P exceeds a certain value, the life and stability of the sub-pixel P are affected. Therefore, the display luminance of the second sub-pixel 12 cannot be excessively increased in order to eliminate the luminance level difference between the first display region a1 and the second display region a 2.

Based on this, in this example, the mobile terminal 01 may respond to the second brightness adjustment instruction on the basis of having the default brightness adjustment function, and adjust the display brightness of the first display area a1 according to the second brightness adjustment instruction alone, for example, when the brightness difference between the first display area a1 and the second display area a2 is large, the display brightness of the first sub-pixel 11 in the first display area a1 is reduced, so that the display brightness difference between the first display area a1 and the second display area a2 may be reduced without excessively increasing the brightness of the second sub-pixel 12 in the second display area a2, the display effect may be improved, and the product life may be ensured.

On this basis, in order to adapt the mobile terminal 01 to different ambient light during use, the mobile terminal 01 is further configured to simultaneously adjust the light emitting luminance of the second sub-pixels 12 in the second display area a 2.

Based on this, the above-mentioned optical device 40 comprises an ambient light detector electrically connected to the processing unit 21.

The ambient light detector is used for detecting ambient light brightness and generating a third brightness adjusting instruction according to the ambient light brightness; the third luminance adjustment instruction is an instruction to instruct the display luminance of the first subpixel 11 and the second subpixel 12 to change in accordance with the ambient light.

If the ambient light detector detects that the ambient light is bright, a third brightness adjustment instruction is generated to instruct to increase the display brightness of the first sub-pixel 11 and the second sub-pixel 12. If the ambient light detector detects that the ambient light is darker, a third brightness adjustment instruction is generated to instruct to decrease the display brightness of the first sub-pixel 11 and the second sub-pixel 12.

In this case, as shown in fig. 10, the method for driving the mobile terminal 01 further includes, in addition to the steps S101 to S106: the following S401 to S406 are performed.

In a case where the processing unit 21 does not receive the third brightness adjustment instruction issued by the ambient light detector, the mobile terminal 01 executes the default driving method as described above in S101 to S106.

After the processing unit 21 receives the third brightness adjustment instruction sent by the ambient light detector, the following driving methods of S401 to 4306 are executed:

s401, the processing unit 21 sends a plurality of initial gray scale data to the driving chip 13; meanwhile, the processing unit 21 also generates a third brightness control signal in response to a third brightness adjustment instruction issued by the ambient light detector.

In order to execute S401, the processing unit 21 of the mobile terminal 01 is further configured to generate a third brightness control signal in response to a third brightness adjustment instruction issued by the ambient light detector while sending the initial gray-scale data to the driving chip 13.

S402, the driving chip 13 generates a fifth data voltage Vdata5 and a sixth data voltage Vdata6, a fifth data voltage Vdata5, a sixth data voltage Vdata6, a fifth data voltage Vdata5, a sixth data voltage Vdata6 matched with the initial gray scale data according to each initial gray scale data in response to the third luminance control signal.

It is understood that, since the third luminance control instruction is an instruction instructing the display luminance of the first sub-pixel 11 and the second sub-pixel 12 to be changed according to the ambient light, the driving chip 13 simultaneously changes the display luminance of the first sub-pixel 11 without changing the display luminance of the second sub-pixel 12 in response to the third luminance control signal.

Therefore, when the driving chip 13 receives the third luminance control signal, a fifth data voltage Vdata5 and a sixth data voltage Vdata6 matched with the initial gray-scale data are generated according to each initial gray-scale data without generating the first data voltage Vdata1 and the second data voltage Vdata2 in response to the third luminance control signal.

And, since the user will issue the third brightness control instruction only in the case where the first display area a1 and the second display area a2 do not match the ambient light. Accordingly, when the driving chip 13 responds to the third luminance control signal, the fifth data voltage Vdata5 generated is different from the first data voltage Vdata1, and the sixth data voltage Vdata6 generated is different from the second data voltage Vdata2, so that the fifth driving current I generated_sd4And a first drive current I_sd1In contrast, the sixth drive current I_sd6And a second drive current I_sd2Differently, the display luminance of the first sub-pixel 11 and the second sub-pixel 12 are adjusted simultaneously.

Here, in order to perform the above S402, the driving chip 13 of the above mobile terminal 01 is further configured to generate one fifth data voltage Vdata5 and one sixth data voltage Vdata6 matched with the initial gray-scale data according to each of the initial gray-scale data in response to the third luminance control signal, and to input the fifth data voltage Vdata5 to the first driving circuit 112 and the sixth data voltage Vdata6 to the second driving circuit 122, as an example.

S403, the first driving circuit 112 generates a fifth driving current in response to the fifth data voltage Vdata5, and performs S405.

Wherein, to perform the above S403, the first driving circuit 112 is further configured to generate the fifth driving current I in response to the fifth data voltage Vdata5, as an example_sd5。

S404, the second driving circuit 122 generates a sixth driving current in response to the sixth data voltage Vdata6, and performs S406.

Wherein, to perform 404 above, the second driving circuit 122 is further configured to generate a sixth driving current I in response to the sixth data voltage Vdata6, as illustrated_sd6。

And S405, the first light-emitting device 111 emits light under the drive of the fifth drive current.

Wherein, in order to perform the above S405, the first light emitting device 111 is illustrated, and is further configured to drive the current I at the fifth driving current_sd5Is driven to emit light.

S406, the second light emitting device 121 emits light under the driving of the sixth driving current.

Wherein, in order to perform the above S406, the second light emitting device 121 is exemplified to be further used for driving the current I in the sixth driving current_sd6Is driven to emit light.

Therefore, on the basis of having the default brightness adjusting function, the mobile terminal 01 can also automatically generate a third brightness adjusting instruction according to the ambient light brightness, respond to the third brightness adjusting instruction, and adjust the display brightness of the whole display screen 101 according to the third brightness adjusting instruction, so as to adapt to the ambient light and improve the user experience effect.

Based on the above, as can be seen from the above equation (1), the first drive current I_sd1Also related to the structure of the first driving circuit 112, the second driving current I_sd2But also to the structure of the second driving circuit 122.

Based on this, the light emission luminance L1 of the first sub-pixel 11 and the light emission luminance L2 of the second sub-pixel 12 are controlled by adjusting the configurations of the first drive circuit 112 and the second drive circuit 122.

Illustratively, the first driving circuit 112 amplifies the first data voltage Vdata1 in response to the first data voltage Vdata1 to generate the first driving current I_sd1。

The second driving circuit 122 amplifies the second data voltage Vdata2 in response to the second data voltage Vdata2 to generate the second driving current I_sd2。

The amplification factor of the first data voltage Vdata1 when the first driving circuit 112 responds to the first data voltage Vdata1 is smaller than that of the second driving circuit 122 responding to the second data voltage Vdata2 when the second driving circuit 122 responds to the second data voltage Vdata 2.

That is, the width-to-length ratio W/L of the driving transistors, the channel carrier mobility μ, and the dielectric constant C of the channel insulating layer in the first driving circuit 112_OXThe product of the three is less than the width-to-length ratio W/L of the driving transistor in the second driving circuit 122, the channel carrier mobility mu and the dielectric constant C of the channel insulating layer_OXThe product of the three.

For example, the channel carrier mobility μ and the dielectric constant C of the channel insulating layer in the first driving circuit 112_OXThe product of the two, the channel carrier mobility mu in the second driving circuit 122 and the dielectric constant C of the channel insulating layer_OXThe products of the two are equal, but the width-to-length ratio W/L of the driving transistors in the first driving circuit 112 is smaller than the width-to-length ratio W/L of the driving transistors in the second driving circuit 112.

Similarly, the amplification factor of the fourth data voltage Vdata4 when the first driving circuit 112 responds to the fourth data voltage Vdata4 is smaller than the amplification factor of the third data voltage Vdata3 when the second driving circuit 122 responds to the third data voltage Vdata 3.

Similarly, the amplification factor of the fourth data voltage Vdata4 when the first driving circuit 112 responds to the fifth data voltage Vdata5 is smaller than the amplification factor of the third data voltage Vdata3 when the second driving circuit 122 responds to the sixth data voltage Vdata 6.

By matching the first driving circuit 112 and the first data voltage Vdata1 to the first driving current I_sd1The second driving circuit 122 is adjusted to cooperate with the second data voltage Vdata2 to generate the second driving current I_sd2The requirements on the driver chip 13 can be reduced by making the adjustment.

Example two

As shown in fig. 11, the method for driving the mobile terminal 01 may include: s501 to S506 and S601 to S606.

In a case where the processing unit 21 does not receive the fourth luminance adjustment instruction issued by the user, the mobile terminal 01 performs S501 to S506:

s501, the processing unit 21 sends a plurality of initial gray-scale data to the driver chip 13.

In order to execute the above S501, the processing unit 21 of the above mobile terminal 01 is configured to send a plurality of initial gray-scale data to the driving chip 13.

S502, the driver chip 13 generates a seventh data voltage Vdata7 corresponding to each piece of the initial gray-scale data.

In order to perform the above S502, the chip 13 is driven to generate the seventh data voltage Vdata7 matched with the initial gray-scale data in response to the initial gray-scale data and according to each of the initial gray-scale data.

That is, only one seventh data voltage Vdata7 is generated for each initial gray-scale data, and the seventh data voltage Vdata7 is input to the first and

second driving circuits

112 and 122, respectively.

S503, the first driving circuit 112 generates a seventh driving current I in response to the seventh data voltage Vdata7_sd7And S505 is executed.

S504, the second driving circuit 122 responds to the seventh data voltage Vdata7 to generate a seventh driving current I_sd7And S506 is performed.

It is understood that the driving current generated by the first driving circuit 112 in response to the seventh data voltage Vdata7 is the same as the driving current generated by the second driving circuit in response to the seventh data voltage Vdata7, and as can be seen from the above formula (1), the width-to-length ratio W/L of the driving transistor, the channel carrier mobility μ, and the dielectric constant C of the channel insulating layer in the first driving circuit 112 and the second driving circuit 122_OXThe products of the three are the same. That is, the amplification factors of the seventh data voltage Vdata7 by the first driving circuit 112 and the second driving circuit 122 are the same.

S505, the first light emitting device 111 drives the current I at the seventh driving current_sd7Is driven to emit light.

S506, the second light emitting device 121 drives the current I at the seventh driving current_sd7Is driven to emit light.

In this case, as can be seen from the above formula (2), the light emission luminance L1 of the first light-emitting device 111 and the light emission luminance L2 of the second light-emitting device 121 are the same.

On this basis, when the user feels that the display luminance of the second display region a2 is lower than the display luminance of the first display region a1, a fourth luminance adjustment instruction may be issued, the fourth luminance adjustment instruction being an instruction indicating that the display luminance of the second subpixel 12 is changed according to the user operation.

As for the fourth brightness adjustment instruction, for example, the user may issue the fourth brightness adjustment instruction to the processing unit 21 by pressing a button on the mobile terminal 01. For example, a volume key is pressed, and a fourth brightness adjustment instruction is issued. If the volume up key is pressed, the fourth brightness adjustment command is a command to increase the display brightness of the second subpixel 12. If the volume down key is pressed, the fourth brightness adjustment command is a command to decrease the display brightness of the second sub-pixel 12. For example, if the display luminance of the second sub-pixel 12 is adjusted to be too bright, the display luminance of the second sub-pixel 12 needs to be reduced to some extent.

For example, the user may send a brightness adjustment instruction to the processing unit 21 by touching a touch key on the display screen 101 of the mobile terminal 01. For example, as shown in fig. 12, a fourth luminance adjustment instruction is issued by sliding the luminance adjustment bar X on the display screen 101 corresponding to the second display area a 2. If the luminance bar is slid to the right, the fourth luminance adjustment command is a command to increase the display luminance of the second subpixel 12. If the luminance bar is slid to the left, the fourth luminance adjustment instruction is an instruction to decrease the display luminance of the second subpixel 12.

For example, the user may issue a brightness adjustment instruction to the processing unit 21 by voice. For example, if the term "bright" is included, the fourth luminance adjustment command is a command for increasing the display luminance of the second subpixel 12. The fourth luminance adjustment instruction is an instruction to decrease the display luminance of the second subpixel 12 if the term "dark" is included.

Based on this, in the case where the processing unit 21 receives the fourth brightness adjustment instruction issued by the user, the mobile terminal 01 performs S601 to S606:

s601, the processing unit 21 responds to a fourth brightness adjustment instruction sent by the user to generate a fourth brightness control signal.

To execute the above S601, the processing unit 21 is further configured to generate a fourth brightness control signal in response to a fourth brightness adjustment instruction issued by the user.

S602, the driving chip 13 generates a seventh data voltage Vdata7 and an eighth data voltage Vdata8, a seventh data voltage Vdata7, an eighth data voltage Vdata8, an eighth data voltage Vdata7, a Vdata8 according to each initial gray scale data in response to the fourth luminance control signal.

Since the fourth luminance adjustment instruction is an instruction to instruct the display luminance of the second subpixel 12 to be changed according to a user operation, the driving chip 13 instructs only to change the display luminance of the second subpixel 12 after responding to the fourth luminance control signal, and does not change the display luminance of the first subpixel 11.

Therefore, when the driving chip 13 receives the fourth luminance control signal, it generates a seventh data voltage Vdata7 and an eighth data voltage Vdata8 corresponding to each initial gray-scale data according to each initial gray-scale data in response to the fourth luminance control signal, without generating only the seventh data voltage Vdata 7.

Also, since the user issues the fourth luminance control command only in case that the second display region a2 is not bright enough, the eighth data voltage Vdata8 generated by the driving chip 13 in response to the fourth luminance control signal is greater than the seventh data voltage Vdata7, so that the eighth driving current I is generated_sd8Greater than the seventh drive current I_sd7To further adjust the display brightness of the second sub-pixel 12 in the second display area a 2.

Wherein, in order to perform the above S602, the driving chip 13 of the above mobile terminal 01 is further configured to generate a seventh data voltage Vdata7 and an eighth data voltage Vdata8 matched with the initial gray-scale data according to each of the initial gray-scale data in response to the fourth luminance control signal; and inputs the eighth data voltage Vdata8 to the second driving circuit 122.

S603, the first driving circuit 112 responds to the seventh data voltage Vdata7 to generateA seventh drive current I_sd7And S605 is executed.

S604, the second driving circuit 122 generates an eighth driving current I in response to the eighth data voltage Vdata8_sd8And S606 is performed.

Wherein, to execute the above S604, the second driving circuit 122 is further configured to generate an eighth driving current I in response to the eighth data voltage Vdata8_sd8。

S605, the first light emitting device 111 drives the current I at the seventh driving current_sd7Is driven to emit light.

S606, the second light emitting device 121 drives the current I in the eighth driving mode_sd8Is driven to emit light.

Wherein, in order to perform the above S205, the second light emitting device 121 is further used for driving a current in an eighth driving current_sd8Is driven to emit light.

Thus, when the color of the portion located in the second display area a2 in the screen displayed by the mobile terminal 01 is relatively dark, the light emitted by the second sub-pixel 12 under the driving of the initial gray-scale data just meets the display requirement, and when there is no brightness difference between the first display area a1 and the second display area a2, the above-mentioned S501-S506 are executed by using the default display mode, and there is no need to adjust the display brightness of the second sub-pixel 12 in the second display area a2, which can reduce power consumption and prolong the service life of the mobile terminal 01.

And when the brightness of the second display area a2 is darker, which results in a brightness step difference between the first display area a1 and the second display area a2, the user may issue a fourth brightness adjustment command, and control the mobile terminal 01 to further adjust the display brightness of the second display area a2 in response to the fourth brightness adjustment command.

Example three

From the above formula (2), the light-emitting luminance L1 and the first driving current I of the first subpixel 11_sd1In relation to the second driving current I, the luminance L2 of the second sub-pixel 12 is_sd2It is related. As can be seen from the above equation (1), the first driving current I_sd1The second drive current I is dependent on the configuration of the first drive circuit 11_sd2In relation to the structure of the second drive circuit 12。

Based on this, the light emission luminance L1 of the first subpixel 11 and the light emission luminance L2 of the second subpixel 12 are controlled by adjusting the amplification factor of the first drive circuit 11 for the data voltage Vdata and the amplification factor of the second drive circuit 12 for the data voltage Vdata.

As an example, as shown in fig. 13, the driving method of the mobile terminal 01 may include steps S701 to S706:

s701, the processing unit 21 sends a plurality of initial gray-scale data to the driver chip 13.

S702, the driving chip 13 generates a data voltage Vdata according to each initial gray scale data.

That is, the driving chip 13 converts each initial gray-scale data into only one data voltage Vdata, and transmits the data voltage Vdata to the first and

second driving circuits

112 and 122, respectively.

S703, the first driving circuit 112 generates the ninth driving current I in response to the data voltage Vdata_sd9And S705 is performed.

S704, the second driving circuit 122 generates a tenth driving current I in response to the data voltage Vdata_sd10And S706 is performed.

The amplification factor of the first driving circuit 112 to the data voltage Vdata is smaller than that of the second driving circuit 122 to the data voltage Vdata.

Here, when the amplification factor of the data voltage Vdata by the first driving circuit 112 is smaller than that of the second driving circuit 122, the structures of the first driving circuit 112 and the second driving circuit 122 may be referred to the related description in example one.

It can be understood from the above formula (1) that the larger the data voltage Vdata is, the larger the driving current I is_sdThe larger. In this example, in the display process, the driving chip 13 transmits the same data voltage Vdata to the first driving circuit 112 and the second driving circuit 122, but since the amplification factor of the data voltage Vdata by the first driving circuit 112 is smaller than that by the second driving circuit 122, the first driving current I is generated_sd1Less than the second drive current I_sd2。

S705, the first light-emitting device 111 drives the current I at the ninth driving current_sd9Is driven to emit light.

S706, the second light emitting device 121 drives the current I in the tenth driving current_sd10Is driven to emit light.

As can be seen from the above formula (2), the light emission luminance L1 of the first subpixel 11 is smaller than the light emission luminance L2 of the second subpixel 12.

The mobile terminal 01 provided by the present application processes data of a picture to be displayed while ensuring normal display of the display screen 101 and improving the light receiving rate of the optical device 40. That is, when displaying a screen, the processing unit 21 receives the initial gray-scale data and transmits the initial gray-scale data to the driving chip 13. The driving chip 13 processes the initial gray scale data to generate a data voltage Vdata, and transmits the data voltage Vdata to the first driving circuit 112 and the second driving circuit 122, respectively. However, since the amplification factor of the first driving circuit 112 to the data voltage Vdata is smaller than that of the second driving circuit 122 to the data voltage Vdata, the first driving current I_sd1Less than the second drive current I_sd2So that the light emission luminance L2 of the second sub-pixel 12 is made larger than the light emission luminance L1 of the first sub-pixel 11. This reduces the demand for the driver chip 13.

The mobile terminal 01 provided by the embodiment of the present application further includes a memory for storing a computer program. The processor is adapted to execute the computer program to perform the method as described above.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer-executable instructions are loaded and executed on a computer, the processes or functions illustrated in accordance with the embodiments of the present application are generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer-readable storage media can be any available media that can be accessed by a computer or can comprise one or more data storage devices, such as servers, data centers, and the like, that can be integrated with the media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., SSD), among others.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The driving chip is used for responding to initial gray scale data and generating a seventh data voltage matched with the initial gray scale data according to each initial gray scale data;

the driving chip is further configured to generate a seventh data voltage and an eighth data voltage matched with the initial gray scale data in response to a fourth luminance control signal and according to each initial gray scale data; the eighth data voltage is greater than the seventh data voltage.

2. A mobile terminal, comprising a processing unit; the processing unit is used for sending initial gray scale data;

the mobile terminal further comprises the driving chip of claim 1 electrically connected with the processing unit.

3. A driving method of a mobile terminal, wherein the mobile terminal includes a first pixel array and a second pixel array; the first pixel array comprises a plurality of first sub-pixels; the second pixel array comprises a plurality of second sub-pixels; the pixel density of the first pixel array is greater than the pixel density of the second pixel array;

the first sub-pixel comprises a first light emitting device and a first driving circuit electrically connected with the first light emitting device; the second sub-pixel comprises a second light emitting device and a second driving circuit electrically connected with the second light emitting device;

the mobile terminal also comprises a driving chip electrically connected with the first driving circuit and the second driving circuit and a processing unit electrically connected with the driving chip;

the driving method of the mobile terminal comprises the following steps:

the processing unit sends a plurality of initial gray scale data to the driving chip;

the driving chip generates a seventh data voltage matched with the initial gray scale data according to each initial gray scale data;

the first drive circuit and the second drive circuit each generate a seventh drive current in response to the seventh data voltage;

the first light-emitting device and the second light-emitting device are driven by the seventh driving current to emit light respectively;

the processing unit also responds to a fourth brightness adjusting instruction sent by the user to generate a fourth brightness control signal; the fourth brightness adjustment instruction is an instruction to instruct the display brightness of the second sub-pixel to change according to a user operation;

the driving chip also responds to the fourth brightness control signal and generates a seventh data voltage and an eighth data voltage which are matched with the initial gray scale data according to each initial gray scale data; the eighth data voltage is greater than the seventh data voltage;

the first drive circuit generates a seventh drive current in response to the seventh data voltage; the first light-emitting device emits light under the drive of the seventh drive current;

the second driving circuit generates an eighth driving current in response to the eighth data voltage; the second light emitting device emits light under the drive of the eighth drive current.

4. A computer readable storage medium comprising computer instructions which, when executed on a processor, cause the processor to perform the method of claim 3.

5. A computer program product, characterized in that the computing device program product, when executed by a processor, performs the method of claim 3.