WO2012155661A1

WO2012155661A1 - Method and system for reducing power consumption of display screen

Info

Publication number: WO2012155661A1
Application number: PCT/CN2012/072755
Authority: WO
Inventors: 古幼鹏; 徐立锋; 王巍; 胡炜
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-07-04
Filing date: 2012-03-21
Publication date: 2012-11-22
Also published as: CN102253707B; CN102253707A

Abstract

Disclosed is a method for reducing power consumption of a display screen, comprising: determining whether a current operation is a blocking operation; and if the current operation is a blocking operation, enabling the display screen to be in a low power consumption working mode, and when the blocking operation ends, restoring the display screen to a normal working mode. When the display screen is in the low power consumption working mode, if it is detected that a user has an input intention, the display screen is restored to the normal working mode. Also disclosed is a system for reducing power consumption of a display screen, comprising a blocking operation determination module, a working mode control module, and a user input intention detection module. Through the present invention, when a current operation is a time-consuming blocking operation, power consumption of a display screen can be significantly reduced.

Description

Method and system for realizing reducing power consumption of display screen

The invention belongs to the technical field of liquid crystal display, and particularly relates to an implementation method and system for reducing power consumption of a display screen. Background technique

Mobile devices, represented by smartphones and tablet PCs, are increasingly using mobile communications, office, entertainment, and more. The current mobile phone battery technology has not undergone qualitative improvements, so the control of power consumption by mobile devices such as smartphones has become very important. In mobile devices such as mobile phones and tablet PCs, the LCD (Liquid Crystal Display) display consumes a large proportion of the entire device, at least 30%. Therefore, reducing the power consumption of the LCD display screen plays an important role in reducing the power consumption of the entire device.

At present, the power consumption of the LCD display can be reduced into two main categories: the first type is optimized from the internal working mechanism of the LCD device itself, for example: improvement of power consumption of the backlight power supply, improvement of the screen scanning algorithm, etc.; The LCD's operating mode is controlled externally, allowing the LCD display to work as low as possible. For example, when the user does not operate for a long time, the LCD display screen is automatically dimmed; after a certain period of time, the LCD display is turned off. It also dynamically updates the LCD refresh rate based on the LCD display content, or updates different display areas, updates only areas where the content changes, and so on.

However, there is another situation that is not noticed by the currently known technology. When the mobile phone is performing a relatively time-consuming operation, the LCD screen is still running at full power, and the LCD display switches to the low-power operation mode of the darkened backlight only after a certain period of time. A typical example of this is as follows: When the user enters a URL in the browser, due to the need to go from the network Downloading data and parsing display data, this process is generally slow, at this point the user can only wait, can not perform the next step, and the screen does not display the user's desired web page results, in this case, let the LCD to full power It doesn't make sense to run. In addition to the typical applications described above, there are many similar scenarios in mobile phones: Streaming media players buffer Internet TV content for the first time,

4 bar contact information is imported/exported to the SIM card (user identification card). Summarizing such scenarios, all have the following common features: The operation takes a long time, this operation is a blocking operation, and only after this operation is completed, the user can perform the next operation.

Therefore, in the scenario described above, the LCD screen operates at full power and has no practical significance, but increases the power consumption of the LCD panel, which is not conducive to power saving. Summary of the invention

The embodiment of the invention provides a method and a system for reducing the power consumption of the display screen, which are used to solve the problem that the display screen operates at full power is not conducive to power saving when the current operation is a blocking operation.

As an aspect of the present invention, an embodiment of the present invention provides an implementation method for reducing power consumption of a display screen, where the method includes:

Determine whether the current operation is a blocking operation;

If it is a blocking operation, the display screen is placed in a low power operation mode, and the blocking operation means that the operation takes a long time, exceeds the preset threshold time, and the user cannot perform the next step before the operation is completed. operating.

Further, the method for reducing the power consumption of the display screen in the embodiment of the present invention further includes: when the blocking operation ends, returning the display screen to the normal working mode.

Further, the low power consumption mode is that the display backlight is darkened or the backlight is turned off.

Further, the method for reducing the power consumption of the display screen in the embodiment of the present invention further includes: when the display screen is in the low power consumption working mode, if the user is detected to have an input intention, the display screen is restored to the normal working mode. Further, the method used to detect the user's input intention includes:

Using the proximity sensor detection, when it is detected that the distance between the user's finger and the display screen is within a preset distance threshold, it is determined that the user has an input intention.

Still further, the proximity sensor is an infrared based light proximity sensor or a capacitive touch screen based proximity sensor.

As another aspect of the present invention, an embodiment of the present invention provides an implementation system for reducing power consumption of a display screen, the system comprising:

The blocking operation determining module is configured to determine whether the current operation is a blocking operation;

The operating mode control module is configured to cause the display to be in a low power mode of operation when the blocking operation determining module determines that the current operation is a blocking operation.

Further, the working mode control module is further configured to:

When the blocking operation ends, the display is restored to the normal operating mode.

Further, the implementation system for reducing power consumption of the display screen in the embodiment of the present invention further includes a user input intention detection module, configured to detect whether the user has an input intention;

Correspondingly, the working mode control module is further configured to restore the display to the normal operating mode when the display is in a low power mode of operation and the user input intent detection module detects that the user has an input intent.

Further, the user input intent detection module includes a proximity sensor and an intent determination submodule; wherein the proximity sensor is configured to detect a distance between the user's finger and the display screen; the intent determination submodule is set to be When the proximity sensor detects that the distance between the user's finger and the display screen is within a preset distance threshold, it is determined that the user has an input intention.

In the embodiment of the present invention, when the current operation is a blocking operation, the working mode of the display screen is adjusted to a low power consumption mode, that is, the backlight of the display screen is dimmed or the backlight is turned off, and when the blocking operation is completed, the working mode of the display screen is further performed. Tune to normal working mode. And, in this process, if it is detected that the user has an input intention, the working mode of the display screen is immediately restored to the normal working mode. Style. Embodiments of the present invention are applicable to display screens of various displays, such as LCD displays, LED displays, and the like. By adopting the solution described in the embodiment of the present invention, for the blocking operation, the power consumption of the display screen can be significantly reduced, which is beneficial to the power saving of the display screen. Moreover, the embodiment of the invention has the advantages of simple implementation and low cost, and has good industrial promotion value. DRAWINGS

1 is a schematic flow chart of an implementation method for reducing power consumption of a display screen according to the present invention as a specific embodiment;

Fig. 2 is a schematic diagram showing the structure of an implementation system for reducing the power consumption of a display screen of the present invention as a specific embodiment. detailed description

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

FIG. 1 is a schematic flowchart of a method for reducing power consumption of a display screen according to an embodiment of the present invention. As shown in the figure, the method for reducing power consumption of a display screen according to an embodiment of the present invention specifically includes the following steps:

Step 101, it is determined whether the current operation is a blocking operation, if it is a blocking operation, step 102 is performed, if it is not a blocking operation, step 106 is performed;

The method may be: determining whether the time required for the current operation exceeds a preset threshold time. If the preset threshold time is exceeded, and the user cannot perform the next operation before the operation is completed, Then it is determined that the current operation is a blocking operation.

Step 102: Keep the display in a low power mode of operation;

Here, the low-power mode of operation can dim the backlight of the display or backlight, or other low-power modes, such as turning off the display.

In the embodiment of the present invention, the display screen is immediately placed in a low power consumption mode when the blocking operation is started. Step 103, whether the current blocking operation is performed, if yes, go to step 105, otherwise step 104;

Step 104, whether it is detected that the user has an input intention, if yes, step 105 is performed; otherwise, step 103 is performed;

In this embodiment, the user is detected whether there is an input intention, and the method is: using proximity sensor detection, when detecting that the distance between the user's finger and the display screen is within a preset distance threshold, determining that the user has input intention . The preset distance threshold is set empirically, for example 0.5 to 5 cm.

The proximity sensor may be an infrared based light proximity sensor or a capacitive touch screen based proximity sensor, or other sensor capable of sensing the distance between the finger and the display screen.

Step 105, leaving the display in a normal working mode;

In normal operating mode, the display consumes the most power, which is the highest power consumption.

Step 106, the process ends.

2 is a schematic structural diagram of an implementation system for reducing power consumption of a display screen according to an embodiment of the present invention. As shown in FIG. 2, an implementation system for reducing power consumption of a display screen according to an embodiment of the present invention includes a blocking operation determining module 201 and a working mode control. Module 202 and user input intent detection module 203.

The blocking operation determining module 201 is configured to determine whether the current operation is a blocking operation. The solution for determining whether the blocking operation is performed may be: pre-determining the time required for the current operation, whether the preset threshold time is exceeded, and if the preset threshold time is exceeded, and the user cannot perform the next operation before the operation is completed, Then it is determined that the current operation is a blocking operation.

The working mode control module 202 is set to:

When the blocking operation determining module 201 determines that the current operation is a blocking operation, the display screen is placed in the low power consumption working mode; in the embodiment of the present invention, the display screen is immediately in the low power consumption working mode when the blocking operation is first executed;

When the blocking operation ends, return the display to the normal operating mode; And, when the display screen is in the low power operation mode, and the user input intention detection module 203 detects that the user has an input intention, the display screen is restored to the normal operation mode.

Low-power modes of operation include dimming the display backlight and turning off the backlight.

The user input intent detection module 203 is arranged to detect whether the user has an input intent.

The user input intention detection module 203 includes a proximity sensor 2031 and an intention determination submodule.

2032; wherein the proximity sensor 2031 is configured to detect a distance between the user's finger and the display screen; the intention determination sub-module 2032 is configured to: when the proximity sensor 2031 detects that the distance between the user's finger and the display screen is within a preset distance threshold At the time, it is determined that the user has an input intention.

The proximity sensor 2031 may be an infrared-based light-sensing proximity sensor or a capacitive touch-screen-based proximity sensor, or may be another sensor capable of sensing the distance between the finger and the display screen.

In the following, a specific embodiment of the system for reducing the power consumption of the display screen will be further described in detail. In this example, the display screen is an LCD display screen.

Taking the Android (Android is an operating system based on Linux open kernel) mobile phone as an example to illustrate the realization system of the present invention to reduce the power consumption of the display. In this example, the user input intent detection module 203 is implemented by a Sensor of the type TYPE_PROXIMITY and its underlying code and hardware, and the Work Mode Control Module 202 is powered by the PowerManager Service (lower). The code and hardware to implement.

In this embodiment, the system workflow for reducing the power consumption of the display screen of the present invention includes: Step 1) Before performing a blocking operation (for example, the user first inputs a web address in the address bar), the working mode control module 202 provides the The LCD display is set to a low power API (Application Programming Interface) function;

Step 2) PowerMangerService receives the information passed by the API function in step 1), and then adjusts the corresponding function of LightsService丄ight (backlight management service). The corresponding function of LightsService.Light sends the corresponding control command to the light of the operating system kernel. In Driver (backlight drive), Light Driver directly controls the LCD display hardware, thus Put the LCD display into low power mode;

Step 3) After performing a blocking operation, for example, obtaining webpage information and parsing the rendering is completed, go to step 5, and if the blocking operation is not performed, go to step 4);

Step 4) The user input intention detection module 203 detects whether the user has an input intention, and the process is: when the user's finger approaches a touch screen at a certain distance, the infrared-based light sensor generates an event to the Proximity Sensor Driver in the operating system kernel. Drive), Proximity Sensor Driver reports this event to Sensorlnterface (sensor abstract interface layer), Sensorlnterface is then passed up to SensorService (sensor service), SensorService passes this event to SensorManager (sensor management) in system control management module, The SensorManager is then passed to the Sensor, which is ultimately passed to the control core PowerManagerService of the Work Mode Control Module 202, thereby allowing the Work Mode Control Module 202 to know that the user has input intent. When the PowerManagerService gets the user input intention information, go to step 7), otherwise, go to step 3);

Step 5) adjusting an API function provided by the working mode control module 202 for setting the LCD display to a normal working state;

Step 6) PowerMangerService receives the information passed by the API function in step 5), and then adjusts the corresponding function of LightsService丄ight. The corresponding function of Lights Service丄ight sends the corresponding control command to the Light Driver of the operating system kernel. Driver directly controls the LCD display hardware, so that the LCD display enters the normal working mode, go to step 8); Step 7) PowerMangerService through step 4) knows that the user has input intention, adjust

LightsService.Light sets the LCD to the normal working mode. This function of LightsService.Light sends the corresponding control commands to the Light Driver of the operating system kernel. The Light Driver directly controls the LCD display hardware, thus allowing the LCD display to enter. Go to normal working mode; Step 8) The process ends.

The specific embodiments described above carry out the objects, technical solutions and beneficial effects of the present invention. It is to be understood that the detailed description of the present invention is intended to Therefore, it is intended that the present invention cover the modifications and variations of the invention, and the modifications and variations of the invention are intended to be included within the scope of the invention.

Claims

Claim

1. An implementation method for reducing power consumption of a display screen, wherein the method comprises:

Determine whether the current operation is a blocking operation;

Determining that the current operation is a blocking operation causes the display to be in a low power operation mode. The blocking operation means that the operation takes longer than the preset threshold time, and the user cannot perform the next operation until the operation is completed.

2. The method for reducing power consumption of a display screen according to claim 1, wherein the method further comprises:

3. The method for reducing power consumption of a display screen according to claim 1 or 2, wherein the low power consumption mode is that the display backlight is darkened or the backlight is turned off.

4. The method for reducing power consumption of a display screen according to claim 1 or 2, wherein the method further comprises:

When the display is in low power mode, the display returns to normal operation if it detects that the user has an input intent.

5. The method for reducing power consumption of a display screen according to claim 4, wherein detecting the user input intention is:

6. The method for reducing power consumption of a display screen according to claim 5, wherein the proximity sensor is an infrared based light proximity sensor or a capacitive touch screen based proximity sensor.

7. An implementation system for reducing power consumption of a display screen, wherein the system comprises: a blocking operation determining module and a working mode control module; wherein

The blocking operation determining module is configured to determine whether the current operation is a blocking operation; the working mode control module is configured to determine, when the blocking operation determining module determines the current operation When the blocking operation is performed, the display screen is placed in a low power consumption working mode, and the blocking operation means that the operation takes longer than the preset threshold time, and the user cannot perform the next operation before the operation is completed.

8. The system for reducing power consumption of a display screen according to claim 7, wherein the operation mode control module is further configured to restore the display screen to a normal operation mode when the blocking operation ends.

9. The system for reducing power consumption of a display screen according to claim 7 or 8, wherein the system further comprises a user input intention detecting module configured to detect whether the user has an input intention;

The operating mode control module is further configured to restore the display to the normal operating mode when the display is in a low power mode of operation and the user input intent detection module detects that the user has an input intent.

10. The system for reducing power consumption of a display screen according to claim 9, wherein the user input intention detection module further comprises a proximity sensor and an intention determination sub-module; wherein the proximity sensor is configured to detect a user's finger and The distance between the display screens; the intent determination sub-module is configured to determine that the user has an input intent when the proximity sensor detects that the distance between the user's finger and the display screen is within a preset distance threshold.