CN108091311B - Control method of display module, terminal and storage medium - Google Patents

Control method of display module, terminal and storage medium Download PDF

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Publication number
CN108091311B
CN108091311B CN201711497837.1A CN201711497837A CN108091311B CN 108091311 B CN108091311 B CN 108091311B CN 201711497837 A CN201711497837 A CN 201711497837A CN 108091311 B CN108091311 B CN 108091311B
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temperature
drive
display module
backlight source
tft
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CN108091311A (en
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张峰
刘双喜
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan Huaxian Photoelectric Technology Co ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source

Abstract

The invention provides a control method of a display module, wherein a plurality of temperature sensors are arranged in an LCD terminal area of the display module, a temperature value set of a preset position in the LCD terminal area of the display module is obtained, the temperature of a drive IC of the display module is compared with the temperature of a backlight source according to the temperature value set, when the temperature of the drive IC is higher than the temperature of the backlight source, the heating of the display module is determined to be mainly caused by the drive IC, and when the temperature of the drive IC is higher than a temperature early warning value of the drive IC, the refreshing frequency of the drive IC is reduced; when the temperature of the backlight source is higher than that of the drive IC, the fact that the heating of the display module is mainly caused by the backlight source is determined, and when the temperature of the backlight source is higher than the temperature early warning value of the backlight source, the power of the backlight source is reduced. The invention also provides a display module, a terminal applying the display module and a storage medium. The invention reduces the power consumption of the display module and correspondingly improves the heat dissipation of the display module at the driving IC and the backlight source.

Description

Control method of display module, terminal and storage medium
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a control method of a display module, the display module, a terminal and a storage medium.
Background
At present, the main reason for the display screen being hot is that when the circuit is working, the current passes through the impedance to generate power consumption. The display screen is mainly hot at the driver IC (Integrated Circuit) and the LED (Light Emitting Diode) string of the BLU (Back Light Unit).
The main power consumption at the driver IC is the power consumption of IOVCC (digital circuit power supply), VSP (liquid crystal driver power supply) and VSN (liquid crystal driver power supply), and the power consumption at the BLU is mainly the current power consumption of the LED lamp, where IOVCC and LED have the largest power consumption and the largest heat. Moreover, after the backlight display module is assembled, the driving IC and the LED are positioned at the adjacent vertical surfaces, so that heat is superposed together, and the hair scald feeling is more obvious.
Disclosure of Invention
The invention mainly aims to provide a control method of a display module, aiming at reducing the power consumption of the display module and improving the heat dissipation of the display module.
In order to achieve the above object, the present invention provides a control method of a display module, in which a plurality of temperature sensors are disposed in an LCD terminal area of the display module, the control method of the display module includes the following steps:
acquiring temperature values of preset positions acquired by a plurality of temperature sensors in an LCD terminal area of a display module to form a temperature value set;
comparing the temperature T of the drive IC of the display module according to the temperature value setICTemperature T of backlight sourceBLThe size of (d);
when T isIC＞TBLWhen the temperature of the drive IC is higher than the temperature early warning value of the drive IC, the refreshing frequency of the drive IC is reduced;
when T isBL＞TICAnd when the temperature of the backlight source is greater than the temperature early warning value of the backlight source, the power of the backlight source is reduced.
Further, the temperature sensors comprise a first TFT sensor, a second TFT sensor and a third TFT sensor;
the first TFT sensor is arranged on the left side of the LCD terminal area, the second TFT sensor is arranged below the middle of the LCD terminal area, and the third TFT sensor is arranged on the right side of the LCD terminal area;
and the first TFT sensor, the second TFT sensor and the third TFT sensor are connected with the input PIN of the drive IC.
Further, the step of obtaining the temperature value of the preset position that a plurality of temperature sensors gathered in the LCD terminal area of display module assembly formed a temperature value set includes:
acquiring a temperature value T on the left side of an LCD terminal area acquired by a first TFT sensor1And the temperature value T below the middle of the LCD terminal area acquired by the second TFT sensor2And the temperature value T on the right side of the LCD terminal area acquired by the third TFT sensor3From the temperature value T1Temperature value T2And a temperature value T3Forming the set of temperature values.
Further, T1＝m1TBL+n1TIC，T2＝m2TBL+n2TIC，T3＝m3TBL+n3TIC(ii) a Wherein m is1+n1＝1、m2+n2＝1、m3+n3＝1。
Further, the temperature T of the drive IC of the display module is compared according to the temperature value setICTemperature T of backlight sourceBLThe step of (a) comprises:
comparing the temperature value T at the second TFT sensor2With the temperature value T at the first TFT sensor1Temperature value T at the third TFT sensor3The difference between the sums;
when T is2＞T1+T3Then, the temperature T of the driver IC is determinedICGreater than the temperature T of the backlightBL；
When T is2＜T1+T3Then, the temperature T of the backlight is determinedBLGreater than the temperature T of the driver ICIC。
Further, when T isIC＞TBLAnd when the temperature of the drive IC is greater than the temperature early warning value of the drive IC, reducing the refresh frequency of the drive IC, comprising the following steps:
when T isIC＞TBLCalculating the temperature of the drive IC according to the current values fed back by the three TFT sensors and the temperature and current characteristic curve of the TFT;
and when the temperature of the drive IC is greater than the temperature early warning value of the drive IC, feeding back a first signal to the drive IC so as to reduce the refresh frequency of the drive IC according to the first signal.
Further, when T isBL＞TICAnd when the temperature of the backlight source is greater than the backlight source temperature early warning value, the step of reducing the power of the backlight source comprises the following steps:
when T isBL＞TICCalculating the temperature of the backlight source according to the current values fed back by the three TFT sensors and the temperature and current characteristic curves of the TFTs;
and when the temperature of the backlight source is greater than the backlight source temperature early warning value, feeding back a second signal to the drive IC so as to reduce the pulse width modulation duty ratio of the backlight source according to the second signal or control the backlight source to enter a preset CABC mode.
The invention further provides a display module, which comprises a plurality of temperature sensors, a memory, a processor and a control program which is stored in the memory and can run on the processor, wherein the control program realizes the steps of the control method of the display module when being executed by the processor.
The invention also provides a terminal which comprises the display module.
The invention further provides a storage medium, which stores a control program, and the control program realizes the steps of the control method of the display module when being executed by the processor.
The control method of the display module comprises the steps of forming a temperature value set by obtaining temperature values of preset positions collected by a plurality of temperature sensors in an LCD terminal area of the display module, comparing the temperature of a drive IC of the display module with the temperature of a backlight source according to the temperature value set, determining that the heating of the display module is mainly caused by the drive IC when the temperature of the drive IC is higher than the temperature of the backlight source, and reducing the refreshing frequency of the drive IC when the temperature of the drive IC is higher than the temperature early warning value of the drive IC; when the temperature of the backlight source is higher than that of the drive IC, the fact that the heating of the display module is mainly caused by the backlight source is determined, and when the temperature of the backlight source is higher than the temperature early warning value of the backlight source, the power of the backlight source is reduced. The control method reduces the power consumption of the display module by reducing the power of the backlight source or reducing the refreshing frequency of the drive IC, and correspondingly improves the heat dissipation of the display module at the drive IC and the backlight source.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a hardware structure of an embodiment of a terminal according to the present invention;
FIG. 2 is a schematic flow chart illustrating a control method of a display module according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating an embodiment of step S20 in FIG. 2;
FIG. 4 is a schematic view of a temperature current characteristic curve of a TFT;
FIG. 5 is a flowchart illustrating an embodiment of step S30 in FIG. 2;
fig. 6 is a flowchart illustrating an embodiment of step S40 in fig. 2.
The reference numbers illustrate:
Figure GDA0002619549630000041
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like.
While the terminal will be described as an example in the following description, those skilled in the art will appreciate that the configuration according to the embodiment of the present invention can be applied to a terminal of a fixed type, in addition to elements particularly used for moving purposes.
Referring to fig. 1, which is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present invention, the terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display module 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the terminal configuration shown in fig. 1 is not intended to be limiting, and that the terminal may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The following describes the various components of the terminal in detail with reference to fig. 1:
the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex-Long Term Evolution), and TDD-LTE (Time Division duplex-Long Term Evolution).
WiFi belongs to short-distance wireless transmission technology, and the terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention. For example, in this embodiment, the terminal 100 may establish a communication connection with the drone based on the WiFi module 102.
The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like. Like this embodiment, when the suggestion of selecting unmanned aerial vehicle flight control mode was exported, this suggestion can be voice prompt, vibrations suggestion etc. based on buzzer.
The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display module 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
The terminal 100 also includes at least one sensor 105, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display interface 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display interface 1061 and/or backlight when the terminal 100 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.
The display module 106 is used for displaying information input by a user or information provided to the user. The Display module 106 may include a Display interface 1061, and the Display interface 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. In particular, the user input unit 107 may include a manipulation interface 1071 and other input devices 1072. The control interface 1071, also referred to as a touch screen, may collect touch operations by a user (e.g., operations by a user on or near the control interface 1071 using a finger, a stylus, or any other suitable object or attachment) and drive the corresponding connection device according to a predetermined program. The manipulation interface 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the manipulation interface 1071 can be implemented in various types, such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the manipulation interface 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.
Further, the manipulation interface 1071 may overlay the display interface 1061, and when the manipulation interface 1071 detects a touch operation thereon or nearby, transmit to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display interface 1061 according to the type of the touch event. Although in fig. 1, the control interface 1071 and the display interface 1061 are two independent components to implement the input and output functions of the terminal, in some embodiments, the control interface 1071 and the display interface 1061 may be integrated to implement the input and output functions of the terminal, which is not limited herein.
The interface unit 108 serves as an interface through which at least one external device is connected to the terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 100 or may be used to transmit data between the terminal 100 and the external device.
The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a control function of the display module), and the like; the storage data region may store data created according to use of the mobile phone (such as a TFT (thin film Transistor) temperature current characteristic curve or the like). Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 110 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system.
Although not shown in fig. 1, the display module 106 may further include a display screen, a driving circuit, and a BackLight (BackLight). The combination of the display screen and the driving circuit is called an Open Cell. The display screen is a box consisting of an upper glass sheet and a lower glass sheet which are filled with liquid crystal and is responsible for displaying various pictures. The driving Circuit is connected with the display screen, comprises a Flexible Printed Circuit Board (FPC), a driving IC, a Printed Circuit Board (PCB) and a connection substrate, and is used for providing various display picture information to the display screen after being electrified. The backlight source is a structure composed of a luminous source, an optical film, a rubber frame and the like and is used for providing a special light source for the TFT-LCD.
As the most core part of the TFT-LCD, the display screen sequentially includes a polarizing plate, a Color Filter (CF) substrate, a liquid crystal, a TFT substrate, and a polarizing plate from top to bottom. The polarizing plate is used for controlling the light of the backlight source to only allow the light in a specific direction to pass through and filtering the light in other directions. The light processed by the polarizer can control the brightness of the light emitted out of the display screen through the twisting action of the liquid crystal molecules, thereby controlling the brightness of the LCD picture. The TFT switch is a three-terminal switch tube, one terminal is a grid electrode and corresponds to a scanning line, the other terminal is a drain electrode and corresponds to a data line, and the other terminal is a source electrode and corresponds to a pixel electrode. Under gate control, the data line of the drain electrode is charged and discharged to the pixel of the source electrode through the TFT. The function of the gate is to control the degree of conductivity of the TFT.
The display module of this embodiment further includes a TFT sensor disposed in the LCD terminal area, the LCD terminal area is located between the TFT (Thin Film Transistor) layer and the CF (color filter) layer, and the LCD terminal is a lead wire extending portion of the LCD, that is, a portion of the LCD extending to be connected with a driving circuit or a driving IC, and is generally disposed on the transparent conductive Film on the glass.
Based on the hardware structure of the terminal, the terminal of the embodiment of the invention compares the temperature of the drive IC of the display module with the temperature of the backlight source according to the temperature value set by acquiring the temperature value set of the preset position in the LCD terminal area of the display module, when the temperature of the drive IC is higher than the temperature of the backlight source, the terminal determines that the heating of the display module is mainly caused by the drive IC, and when the temperature of the drive IC is higher than the temperature early warning value of the drive IC, the refresh frequency of the drive IC is reduced; when the temperature of the backlight source is higher than that of the drive IC, the fact that the heating of the display module is mainly caused by the backlight source is determined, and when the temperature of the backlight source is higher than the temperature early warning value of the backlight source, the power of the backlight source is reduced. The terminal reduces the power of the backlight source or the refresh frequency of the drive IC by controlling the display module, reduces the power consumption of the display module, correspondingly improves the heat dissipation of the display module at the drive IC and the backlight source, and further reduces the power consumption of the terminal and improves the heat dissipation.
As shown in fig. 1, the memory 109, which is a kind of computer storage medium, may include therein an operating system and a control program.
A plurality of temperature sensors are disposed in the LCD terminal area of the display module, and the processor 110 may be configured to call the control method of the display module stored in the memory 109, and perform the following operations:
acquiring temperature values of preset positions acquired by a plurality of temperature sensors in an LCD terminal area of a display module to form a temperature value set;
comparing the temperature T of the drive IC of the display module according to the temperature value setICTemperature T of backlight sourceBLThe size of (d);
when T isIC＞TBLWhen the temperature of the drive IC is higher than the temperature early warning value of the drive IC, the refreshing frequency of the drive IC is reduced;
when T isBL＞TICAnd when the temperature of the backlight source is greater than the backlight source temperature early warning value, the power of the backlight source is reduced.
Further, the temperature sensors comprise a first TFT sensor, a second TFT sensor and a third TFT sensor;
the first TFT sensor is arranged on the left side of the LCD terminal area, the second TFT sensor is arranged below the middle of the LCD terminal area, and the third TFT sensor is arranged on the right side of the LCD terminal area;
and the first TFT sensor, the second TFT sensor and the third TFT sensor are connected with the input PIN of the drive IC.
Further, the processor 110 may be further configured to call a control method of the display module stored in the memory 109, and perform the following operations:
acquiring a temperature value T on the left side of an LCD terminal area acquired by a first TFT sensor1And the temperature value T below the middle of the LCD terminal area acquired by the second TFT sensor2And the temperature value T on the right side of the LCD terminal area acquired by the third TFT sensor3From the temperature value T1Temperature value T2And a temperature value T3Forming the set of temperature values.
Further, T1＝m1TBL+n1TIC，T2＝m2TBL+n2TIC，T3＝m3TBL+n3TIC(ii) a Wherein m is1+n1＝1、m2+n2＝1、m3+n3＝1。
Further, the processor 110 may be further configured to call a control method of the display module stored in the memory 109, and perform the following operations:
comparing the temperature value T at the second TFT sensor2With the temperature value T at the first TFT sensor1Temperature value T at the third TFT sensor3The difference between the sums;
when T is2＞T1+T3Then, the temperature T of the driver IC is determinedICGreater than the temperature T of the backlightBL；
When T is2＜T1+T3Then, the temperature T of the backlight is determinedBLGreater than the temperature T of the driver ICIC。
Further, the processor 110 may be further configured to call a control method of the display module stored in the memory 109, and perform the following operations:
when T isIC＞TBLCalculating the temperature of the driving IC according to the current values fed back by the three TFT sensors and the temperature and current characteristic curve of the TFT;
when the temperature at the driving IC is larger than the temperature early warning value of the driving IC, feeding back a first signal to the driving IC so as to reduce the refresh frequency of the driving IC according to the first signal.
Further, the processor 110 may be further configured to call a control method of the display module stored in the memory 109, and perform the following operations:
when T isBL＞TICCalculating the temperature of the backlight source according to the current values fed back by the three TFT sensors and the TFT temperature current characteristic curve;
and when the temperature of the backlight source is greater than the backlight source temperature early warning value, feeding back a second signal to the drive IC so as to reduce the pulse width modulation duty ratio of the backlight source according to the second signal or control the backlight source to enter a preset CABC mode.
The invention further provides a control method of the display module.
Referring to fig. 2, fig. 2 is a flowchart illustrating a control method of a display module according to an embodiment of the present invention.
In the present application, a terminal of an LCD (Liquid Crystal Display) is a lead-extending portion of the LCD, that is, a portion from which the LCD extends to be connected with a circuit or a driver IC, and is generally formed on a transparent conductive film on glass.
In this embodiment, a plurality of temperature sensors are disposed in an LCD terminal area of the display module, and the control method of the display module includes the following steps:
s10: acquiring temperature values of preset positions acquired by a plurality of temperature sensors in an LCD terminal area of a display module to form a temperature value set;
in this embodiment, because the main position of generating heat in the display module is driver IC department and backlight department, and driver IC and LED backlight are in adjacent perpendicular face department after the display module assembles TPM, and the LCD terminal area is located between TFT (thin film Transistor) layer and CF (color filter) layer, therefore the main position of generating heat in the display module can be judged by obtaining the temperature values of a plurality of preset positions in the LCD terminal area through the plurality of temperature sensors that set up in the LCD terminal area, and then prevent the terminal that uses this display module from generating heat through corresponding power consumption reduction or heat dissipation measure, improve user experience. The preset positions in the LCD terminal area can be correspondingly set according to the size of the LCD terminal area, and the set rule is to collect the temperature value of at least one position close to the drive IC and the temperature values of at least two backlight sources.
S20: comparing the temperature T of the drive IC of the display module according to the temperature value setICTemperature T of backlight sourceBLThe size of (d);
after the temperature value set of the preset position in the LCD terminal area is obtained, whether the temperature of the driver IC is too high or the temperature of the backlight source is too high can be calculated according to the difference between different temperature values in the temperature value set, and since the heat generation amount of the display module of the LCD is mainly caused by the power consumption of the driver IC or the backlight source, in other embodiments, when the temperature at the driver IC is too high or the temperature at the backlight source is too high, the determination can be performed by comparing the power consumption of the driver IC with the power consumption of the backlight source.
S30: when T isIC＞TBLWhen the temperature of the drive IC is higher than the temperature early warning value of the drive IC, the refreshing frequency of the drive IC is reduced;
when the temperature of the drive IC of the display module is higher than that of the backlight source, the heating value of the display screen can be judged to be mainly caused by the drive IC, in order to further accurately regulate and control the temperature of the display screen and the terminal, the temperature of the drive IC can be further detected, and when the temperature of the drive IC exceeds a corresponding preset early warning value, namely the temperature of the drive IC exceeds the temperature early warning value of the drive IC, the refreshing frequency of the drive IC is reduced. In order to increase the good experience of the user, the working temperature of the display screen needs to be controlled to a preset temperature at which the user experiences the best, and meanwhile, in order to prevent the display screen from influencing the health condition and the service life of the display screen under the condition of high temperature for a long time, power consumption reduction or heat dissipation processing needs to be performed on the display screen.
S30: when T isBL＞TICAnd when the temperature of the backlight source is greater than the backlight source temperature early warning value, the power of the backlight source is reduced.
Similarly, when the temperature of the backlight of the display module is higher than the temperature of the drive IC, it can be determined that the heat productivity of the display screen is mainly caused by the backlight, and in order to further accurately regulate and control the temperature of the display screen and the terminal, the temperature of the backlight can be further detected, and when the temperature of the backlight exceeds the temperature early warning value of the backlight, the power of the backlight is reduced.
According to the control method of the display module, a temperature value set is formed by obtaining temperature values of preset positions collected by a plurality of temperature sensors in an LCD terminal area of the display module, the temperature of a drive IC of the display module is compared with the temperature of a backlight source according to the temperature value set, when the temperature of the drive IC is higher than the temperature of the backlight source, it is determined that the heating of the display module is mainly caused by the drive IC, and when the temperature of the drive IC is higher than a temperature early warning value of the drive IC, the refreshing frequency of the drive IC is reduced; when the temperature of the backlight source is higher than that of the drive IC, the fact that the heating of the display module is mainly caused by the backlight source is determined, and when the temperature of the backlight source is higher than the temperature early warning value of the backlight source, the power of the backlight source is reduced. The control method reduces the power consumption of the display module by reducing the power of the backlight source or reducing the refreshing frequency of the drive IC, and correspondingly improves the heat dissipation of the display module at the drive IC and the backlight source.
Further, the temperature sensors comprise a first TFT sensor, a second TFT sensor and a third TFT sensor;
the first TFT sensor is arranged on the left side of the LCD terminal area, the second TFT sensor is arranged below the middle of the LCD terminal area, and the third TFT sensor is arranged on the right side of the LCD terminal area;
and the first TFT sensor, the second TFT sensor and the third TFT sensor are connected with the input PIN of the drive IC.
In this embodiment, in order to accurately determine whether the temperature of the driver IC or the backlight exceeds the corresponding preset warning value, for the installation positions of the driver IC and the backlight in the LCD, three TFT (thin film transistor) sensors, such as a first TFT sensor, a second TFT sensor, and a third TFT sensor, are disposed in the LCD terminal area, because the LCD terminal area is disposed between the TFT layer and the CF layer, and the first TFT sensor, the second TFT sensor, and the third TFT sensor are all connected to the input PIN of the driver IC, the input PIN of the driver IC is a single row, the output PIN of the driver IC is a double row, and the first TFT sensor, the second TFT sensor, and the third TFT sensor perform temperature change feedback through the input PIN. The LCD terminal area is relatively closer to the driver IC, thus the first TFT sensor is arranged on the left side of the LCD terminal area, mainly monitoring the temperature at the backlight, the second TFT sensor is arranged below the middle of the LCD terminal area, mainly monitoring the temperature at the driver IC and the backlight, the third TFT sensor is arranged on the right side of the LCD terminal area, mainly monitoring the temperature at the backlight.
Further, the step of obtaining the temperature value of the preset position that a plurality of temperature sensors gathered in the LCD terminal area of display module assembly formed a temperature value set includes:
acquiring a temperature value T on the left side of an LCD terminal area acquired by a first TFT sensor1And the temperature value T below the middle of the LCD terminal area acquired by the second TFT sensor2And the temperature value T on the right side of the LCD terminal area acquired by the third TFT sensor3From the temperature value T1Temperature value T2And a temperature value T3Forming the set of temperature values.
In this embodiment, since the first TFT sensor, the second TFT sensor and the third TFT sensor are all connected to the input PIN of the driving IC, and the current of the TFT shows a characteristic curve with the temperature change, the temperature value T on the left side of the LCD terminal area collected by the first TFT sensor1And the temperature value T below the middle of the LCD terminal area acquired by the second TFT sensor2And the temperature value T on the right side of the LCD terminal area acquired by the third TFT sensor3The temperature value of the left side of the LCD terminal area, the temperature of the area below the middle of the LCD terminal area and the temperature value of the right side of the LCD terminal area can be obtained.
As shown in fig. 4, the higher the temperature at the TFT sensor, the larger the corresponding current value.
Further, T1＝m1TBL+n1TIC，T2＝m2TBL+n2TIC，T3＝m3TBL+n3TIC(ii) a Wherein m is1+n1＝1、m2+n2＝1、m3+n3＝1。
In this embodiment, since the LCD terminal area is relatively closer to the driver IC, the first TFT sensor is disposed on the left side of the LCD terminal area, and mainly monitors the temperature at the backlight source, for example, the temperature at the backlight source is defined as TBDefining the temperature at the driver IC as TIThen the temperature value T at the first TFT sensor1＝95％TB+5％TIThe second TFT sensor is arranged below the middle of the LCD terminal area and mainly used for monitoring the temperature at the driving IC and the backlight source and the temperature value T at the second TFT sensor2＝50％TB+50％TIThe third TFT sensor is arranged on the right side of the LCD terminal area and is mainly used for monitoring the temperature at the backlight source and the temperature value T at the third TFT sensor3＝95％TB+5％TI。
Further, referring to fig. 3, the control method of the display module according to the foregoing embodiment, in step S20, includes:
s21: comparing the temperature value T at the second TFT sensor2With the temperature value T at the first TFT sensor1Temperature value T at the third TFT sensor3The difference between the sums;
in this embodiment, the main basis for determining whether the hot hair of the display module is caused by the power consumption or temperature of the driving IC or the power consumption or temperature of the backlight source is to compare the difference between the temperature value at the second TFT sensor and the sum of the temperature values at the first and second TFT sensors, and during the actual operation of the LCD, the temperature at the first TFT sensor is substantially the same as the temperature value at the third TFT sensor, so the comparison may be performed in such a manner that the average value of the sum of the temperature values at the first TFT sensor and the third TFT sensor is compared with half of the temperature value at the second TFT sensor.
S22: when T is2＞T1+T3Then, the temperature T of the driver IC is determinedICGreater than the temperature T of the backlightBL；
When the temperature value at the second TFT sensor is greater than the sum of the temperature values at the first and third TFT sensors, determining the temperature T of the drive ICICGreater than the temperature T of the backlightBLThat is, the display screen is hot mainly caused by the power consumption or temperature of the driving IC.
S23: when T is2＜T1+T3Time, judgeTemperature T of backlight sourceBLGreater than the temperature T of the driver ICIC。
Similarly, when the temperature value at the second TFT sensor is smaller than the sum of the temperature values at the first and third TFT sensors, the temperature T of the backlight source is judgedBLGreater than the temperature T of the driver ICICThat is, the display screen is hot due to the power consumption or temperature of the backlight.
Further, referring to fig. 5, the control method of the display module according to the foregoing embodiment, in step S30, includes:
s31: when T isIC＞TBLCalculating the temperature of the driving IC according to the current values fed back by the three TFT sensors and the temperature and current characteristic curve of the TFT;
in this embodiment, when the temperature of the driver IC is greater than the temperature of the backlight source, it is determined that the display screen is hot and mainly caused by the temperature or the power consumption of the driver IC, and accordingly, the power consumption of the backlight source can be relatively ignored, and at this time, the temperature value of the driver IC can be calculated according to the current values fed back by the first TFT sensor, the second TFT sensor, and the third TFT sensor and the TFT temperature-current characteristic curve.
S32: and when the temperature of the drive IC is greater than the temperature early warning value of the drive IC, feeding back a first signal to the drive IC so as to reduce the refresh frequency of the drive IC according to the first signal.
When the temperature of the drive IC is greater than the temperature early warning value of the drive IC, a first signal is fed back to the drive IC, and the drive IC generates a corresponding first control instruction when receiving the first signal, so that the drive IC is controlled to reduce the refresh frequency, and the power consumption of the drive IC is reduced.
Further, referring to fig. 6, the control method of the display module according to the foregoing embodiment, in step S40, includes:
s41: when T isBL＞TICCalculating the temperature of the backlight source according to the current values fed back by the three TFT sensors and the TFT temperature current characteristic curve;
in this embodiment, when the temperature of the backlight is greater than the temperature of the driver IC, it is determined that the display screen is hot and mainly caused by the temperature of the backlight or the power consumption of the driver IC, and accordingly, the power consumption of the driver IC can be relatively ignored, and at this time, the temperature value of the backlight can be calculated according to the current values fed back by the first TFT sensor, the second TFT sensor, and the third TFT sensor and the TFT temperature-current characteristic curve.
S42: and when the temperature of the backlight source is greater than the backlight source temperature early warning value, feeding back a second signal to the drive IC so as to reduce the pulse width modulation duty ratio of the backlight source according to the second signal or control the backlight source to enter a preset CABC mode.
And when the temperature of the backlight source is greater than the backlight source temperature early warning value, feeding back a second signal to the drive IC, generating a corresponding second control instruction by the drive IC when receiving the second signal, and then reducing the pulse width modulation duty ratio of the backlight source according to the second control instruction or controlling the backlight source to enter a preset CABC mode.
The CABC (Content Adaptive Brightness Control) is characterized in that a Content information Analyzer (Image Content Analyzer) circuit is additionally arranged in an LCD (liquid crystal display) driving IC, and the Content Analyzer calculates and counts picture data and then automatically increases the gray scale Brightness by 30% according to setting and algorithm after the picture data is transmitted to the driving IC by a mobile phone processor, and then reduces the backlight Brightness by 30%.
In addition, an embodiment of the present invention further provides a storage medium, where the storage medium stores a control program, and the control program, when executed by a processor, implements the steps of the control method for a display module as described above.
The method for implementing the control program when executed can refer to the embodiments of the control method of the display module of the present invention, and is not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (9)

1. A control method of a display module is characterized in that a plurality of temperature sensors are arranged in an LCD terminal area of the display module, and the control method of the display module comprises the following steps:
acquiring temperature values of preset positions acquired by a plurality of temperature sensors in an LCD terminal area of a display module to form a temperature value set;
comparing the temperature T of the drive IC of the display module according to the temperature value setICTemperature T of backlight sourceBLThe size of (d);
when T isIC＞TBLWhen the temperature of the drive IC is higher than the temperature early warning value of the drive IC, the refreshing frequency of the drive IC is reduced;
when T isBL＞TICWhen the temperature of the backlight source is greater than the temperature early warning value of the backlight source, the power of the backlight source is reduced;
the temperature value set comprises a temperature value close to the drive IC and temperature values close to the backlight source;
and comparing the temperature T of the drive IC of the display module according to the temperature value setICTemperature T of backlight sourceBLThe step of (a) comprises:
when the temperature value close to the drive IC is larger than the sum of the temperature values close to the two backlights, the temperature T of the drive IC is judgedICGreater than the temperature T of the backlightBL；
When the temperature value close to the drive IC is less than the sum of the temperature values close to the two backlights, the temperature T of the backlight is judgedBLGreater than the temperature T of the driver ICIC。
2. The control method of claim 1, wherein the number of temperature sensors includes a first TFT sensor, a second TFT sensor, and a third TFT sensor;
the first TFT sensor is arranged on the left side of the LCD terminal area, the second TFT sensor is arranged below the middle of the LCD terminal area, and the third TFT sensor is arranged on the right side of the LCD terminal area;
and the first TFT sensor, the second TFT sensor and the third TFT sensor are connected with the input PIN of the drive IC.
3. The control method according to claim 2, wherein the step of obtaining temperature values at preset positions collected by a plurality of temperature sensors in an LCD terminal area of the display module to form a set of temperature values comprises:
acquiring a temperature value T on the left side of an LCD terminal area acquired by a first TFT sensor1Second TFTemperature value T of middle lower part of LCD terminal area collected by T sensor2And the temperature value T on the right side of the LCD terminal area acquired by the third TFT sensor3From the temperature value T1Temperature value T2And a temperature value T3Forming the set of temperature values.
4. The control method according to claim 3, wherein the comparing of the temperature T of the driving ICs of the display module according to the set of temperature valuesICTemperature T of backlight sourceBLThe step of (a) comprises:
comparing the temperature value T at the second TFT sensor2With the temperature value T at the first TFT sensor1Temperature value T at the third TFT sensor3The difference between the sums;
when T is2＞T1+T3Then, the temperature T of the driver IC is determinedICGreater than the temperature T of the backlightBL；
When T is2＜T1+T3Then, the temperature T of the backlight is determinedBLGreater than the temperature T of the driver ICIC。
5. The control method of claim 4, wherein said time T isIC＞TBLAnd when the temperature of the drive IC is greater than the temperature early warning value of the drive IC, reducing the refresh frequency of the drive IC, comprising the following steps:
when T isIC＞TBLCalculating the temperature of the drive IC according to the current values fed back by the three TFT sensors and the temperature and current characteristic curve of the TFT;
and when the temperature of the drive IC is greater than the temperature early warning value of the drive IC, feeding back a first signal to the drive IC so as to reduce the refresh frequency of the drive IC according to the first signal.
6. The control method of claim 4, wherein said time T isBL＞TICAnd when the temperature of the backlight source is greater than the backlight source temperature early warning value, the step of reducing the power of the backlight source comprises the following steps:
when T isBL＞TICCalculating the temperature of the backlight source according to the current values fed back by the three TFT sensors and the temperature and current characteristic curves of the TFTs;
and when the temperature of the backlight source is greater than the backlight source temperature early warning value, feeding back a second signal to the drive IC so as to reduce the pulse width modulation duty ratio of the backlight source according to the second signal or control the backlight source to enter a preset CABC mode.
7. A display module, characterized in that the display module comprises a plurality of temperature sensors, a memory, a processor and a control program stored in the memory and capable of running on the processor, wherein the control program, when executed by the processor, implements the steps of the control method of the display module according to any one of claims 1 to 6.
8. A terminal, characterized in that it comprises a display module according to claim 7.
9. A storage medium storing a control program which, when executed by a processor, implements the steps of the method of controlling a display module according to any one of claims 1 to 6.
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