WO2015143688A1

WO2015143688A1 - Method for adjusting button light of mobile terminal, and mobile terminal

Info

Publication number: WO2015143688A1
Application number: PCT/CN2014/074241
Authority: WO
Inventors: 吴福民
Original assignee: 华为终端有限公司
Priority date: 2014-03-28
Filing date: 2014-03-28
Publication date: 2015-10-01

Abstract

Disclosed are a method for adjusting a button light of a mobile terminal and the mobile terminal, which are used to solve the problem existing in the prior art that a button light of a mobile terminal cannot be adaptively adjusted, so that the power consumption of the mobile terminal is high and the service life of the mobile terminal is short. The method comprises: detecting the ambient light intensity of a mobile terminal; and according to the detected ambient light intensity, adjusting the brightness of a button light of the mobile terminal inversely relative to the detected ambient light intensity.

Description

The present invention relates to the field of electronic technologies, and in particular, to a method for adjusting a button light of a mobile terminal and a mobile terminal. BACKGROUND OF THE INVENTION At present, the change of the brightness of the button light of the mobile terminal and the change of the brightness of the screen backlight are consistent. When the ambient light intensity becomes stronger, the screen backlight becomes brighter and the button light also becomes brighter. When the ambient light intensity is weak, the screen backlight becomes weak, and the brightness of the button light is also weak.

When adjusting the button light in the above manner, there are the following disadvantages:

(1) For different ambient light levels, there is a difference in the brightness of the button light and the brightness of the screen backlight. Since the brightness of the button light is consistent with the brightness of the screen backlight, it is not possible to adjust the button lamp according to the change of the ambient light intensity.

(2) When the ambient light intensity increases, the brightness of the button light increases. Since the brightness of the button light is the brightest and the power consumption of the button light is about 11 mA during use, the power consumption of the mobile terminal is increased and the movement is reduced when the ambient light intensity is increased and the brightness of the button light is increased. The service life of the terminal. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method for adjusting a button light of a mobile terminal and a mobile terminal, which are used to solve the problem that the button lamp of the mobile terminal cannot be adaptively adjusted in the prior art, and the mobile terminal consumes a large amount of power and moves. The problem of short life of the terminal.

The specific technical solutions provided by the embodiments of the present invention are as follows:

In a first aspect, a method for adjusting a button light of a mobile terminal, the method comprising:

Detecting an ambient light intensity of the mobile terminal;

Based on the detected ambient light intensity, the brightness of the button light of the mobile terminal is inversely adjusted with respect to the detected ambient light intensity.

With reference to the first aspect, in a first possible implementation, the brightness of the button light of the mobile terminal is reversely adjusted according to the detected ambient light intensity, and the method includes:

The brightness of the button light of the mobile terminal is reversely adjusted according to the formula Y=S*((Levelbase-Level)*N+M), where Y represents the brightness of the button light, Levelbase is the ambient light intensity threshold, and Level is detected. Ambient light intensity, M is the compensation coefficient, N is the intensity coefficient of the ambient light intensity converted to the ambient light level, and S is the ambient light level converted to real The coefficient of brightness is displayed.

In conjunction with the first possible implementation of the first aspect, in a second possible implementation, the value of M is a real number in the range [0, 1]; the value of N is a real number in the range of (0, 1) ; S is an integer in the range of (0, 255).

With reference to the first aspect, the first possible implementation manner of the first aspect, and the second possible implementation manner, in the third possible implementation manner, the detecting the ambient light intensity of the mobile terminal, specifically including :

When the adjustment mode of the button light of the mobile terminal is automatic adjustment, the ambient light intensity of the mobile terminal is detected.

With reference to the first aspect, the first possible implementation of the first aspect to any one of the third possible implementation manners, in the fourth possible implementation manner, the detecting according to the detected ambient light intensity The brightness of the button light of the mobile terminal is reversely adjusted with respect to the detected ambient light intensity, and specifically includes:

When the detected ambient light intensity is less than a predetermined ambient light intensity threshold, and the button light is turned on, the brightness of the button light of the mobile terminal is reversed according to the detected ambient light intensity with respect to the detected ambient light intensity. Adjustment.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, after the detecting the ambient light intensity of the mobile terminal, the method further includes: when detecting the ambient light intensity If the threshold is greater than the predetermined ambient light intensity, the button light is turned off.

In a second aspect, a mobile terminal includes: an ambient light intensity sensor, a processor, and a button light;

The ambient light intensity sensor is configured to detect an ambient light intensity of the mobile terminal;

The processor is configured to inversely adjust the brightness of the button light relative to the detected ambient light intensity according to the ambient light intensity detected by the ambient light intensity sensor;

The button lamp is configured to display, according to the brightness of the processor, the brightness of the processor that is inversely adjusted with respect to the detected ambient light intensity.

In conjunction with the second aspect, in a first possible implementation, the processor is configured to:

Performing a reverse adjustment of the brightness of the button lamp according to the formula Y=S*((Levelbase-Level)*N+M), wherein

Y indicates the brightness of the button light, Levelbase is the ambient light intensity threshold, Level is the detected ambient light intensity, M is the compensation coefficient, N is the intensity coefficient of the ambient light intensity converted to the ambient light level, and S is the ambient light level converted to the actual Displays the coefficient of brightness.

In conjunction with the first possible implementation of the second aspect, in the second possible implementation, the value of M is a real number in the range [0, 1]; the value of N is a real number in the range of (0, 1) ; The value of S is an integer in the range of (0, 255).

With reference to the second aspect, any one of the first possible implementation manner and the second possible implementation manner of the second aspect, in a third possible implementation manner, when performing a button light on the mobile terminal When the mode of adjustment is automatic adjustment, the ambient light intensity sensor detects the ambient light intensity of the mobile terminal.

With reference to the second aspect, any of the first possible implementation of the second aspect to the third possible implementation In a fourth possible implementation manner, when the ambient light intensity detected by the ambient light intensity sensor is less than a predetermined ambient light intensity threshold, and the button light is turned on, the processor is configured according to the detected The ambient light intensity inversely adjusts the brightness of the button light of the mobile terminal relative to the detected ambient light intensity.

With reference to the fourth possible implementation of the second aspect, in a fifth possible implementation, when the ambient light intensity detected by the ambient light sensor is greater than a predetermined ambient light intensity threshold, the processor turns off the button light.

In summary, the solution provided by the embodiment of the present invention realizes adaptive adjustment of the button lamp, and in the case where the ambient light intensity changes, the brightness of the button lamp is compared with the ambient light intensity according to the received ambient light intensity. The reverse adjustment reduces the power consumption of the mobile terminal and prolongs the service life of the mobile terminal. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a flowchart of a method for automatically adjusting a button light of a mobile terminal according to an embodiment of the present invention;

2 is a schematic diagram of a mobile terminal of a mobile terminal according to an embodiment of the present invention;

FIG. 3 is a diagram showing a correspondence between a button lamp adjustment mode of a mobile terminal and an LCD backlight adjustment mode of the mobile terminal and an ambient light sensor state according to an embodiment of the present disclosure;

FIG. 4 is a flowchart of still another method for automatically adjusting a button light of a mobile terminal according to an embodiment of the present invention; FIG. 5 is a flowchart of a method for manually adjusting a button light of a mobile terminal according to an embodiment of the present invention. The embodiments of the present invention provide a method for adjusting a button light of a mobile terminal and a mobile terminal, which are used to solve the problem that the button lamp of the mobile terminal cannot be adaptively adjusted in the prior art, and the power consumption of the mobile terminal is large. The problem of short life of mobile terminals.

The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

An embodiment of the present invention provides a method for adjusting a button light of a mobile terminal. As shown in FIG. 1 , the method includes: Step 101: Detecting an ambient light intensity of the mobile terminal.

Specifically, the ambient light intensity can be detected by an ambient light intensity sensor of the mobile terminal.

Step 102: Perform reverse adjustment of the brightness of the button lamp of the mobile terminal with respect to the detected ambient light intensity according to the detected ambient light intensity.

Specifically, the brightness of the button light can be reversely adjusted by the processor of the mobile terminal. The so-called reverse adjustment is: When the ambient light intensity is increased, the brightness of the button lamp is relatively lowered, and when the ambient light intensity is lowered, the brightness of the button lamp is relatively increased.

By using the above method, the button lamp is adaptively adjusted, and in the case where the ambient light intensity changes, the brightness of the button lamp is reversely adjusted according to the detected ambient light intensity, and the detected ambient light intensity is reversely adjusted. The power consumption of the mobile terminal is lowered, and the service life of the mobile terminal is prolonged.

Preferably, the brightness of the button light of the mobile terminal is reversely adjusted according to the detected ambient light intensity with respect to the detected ambient light intensity, including:

The brightness of the button light of the mobile terminal is reversely adjusted according to the formula Y=S*((Levelbase-Level)*N+M), where Y represents the brightness of the button light, Levelbase is the ambient light intensity threshold, and Level is detected. Ambient light intensity, M is the compensation coefficient, N is the intensity coefficient of the ambient light intensity converted to the ambient light level, and S is the coefficient of the ambient light level converted to the actual display brightness.

Wherein, the value of M is a real number in the range [0, 1]; the value of N is a real number in the range of (0, 1); the value of S is an integer in the range of (0, 255). Take the value according to actual needs.

Where the real value of the range of M is [0, 1], the value of M may be a real number in the range of 0 or more and less than or equal to 1, and the value of N is a real number in the range of (0, 1). The value may be a real number greater than 0 and less than or equal to 1, and the value of S is similar to that of the S, and will not be described again.

Based on any of the foregoing method embodiments, preferably, the detecting the ambient light intensity of the mobile terminal includes: detecting an ambient light intensity of the mobile terminal when the brightness of the button light of the mobile terminal is automatically adjusted.

Based on any of the foregoing method embodiments, preferably, the method further includes:

When the adjustment mode of the button lamp of the mobile terminal and the display screen of the mobile terminal is manually adjusted, the ambient light intensity at which the mobile terminal is located is stopped.

Specifically, the adjustment manner of the button lamp may be determined according to a control instruction of receiving the adjustment mode of the button lamp of the mobile terminal, and the adjustment mode of the display screen of the mobile terminal is determined according to the received control instruction of the adjustment mode of the display screen of the mobile terminal.

When the ambient light intensity is detected as described above, the ambient light intensity sensor is turned on. When the ambient light intensity is stopped, the ambient light sensor is off.

Based on any of the foregoing method embodiments, preferably, the brightness of the button light of the mobile terminal is reversely adjusted according to the detected ambient light intensity, and the method includes:

Preferably, when the detected ambient light intensity is greater than a predetermined ambient light intensity, the button light is turned off.

Based on any of the above method embodiments, preferably, if a control command is received, the button light is turned on for a predetermined time.

If the button light is turned on for a predetermined time and the control command is not received within the time of opening, the button light is turned off. If the time difference between the time when the control command is received and the last time the control command is received does not reach the predetermined time threshold, the time when the button light is turned on is re-timed from the time when the control command is received.

The control command may be a control command generated by a touch screen display, or may be an instruction generated by a trigger button (TP, Touch Panel). The trigger button can be a trigger up and down volume button, a switch button, a main menu button (home), and the like.

Based on the same inventive concept as the above method embodiment, the present invention further provides a mobile terminal. As shown in FIG. 2, the mobile terminal includes an ambient light intensity sensor 201, a processor 202, and a button light 203:

The ambient light intensity sensor 201 is configured to detect an ambient light intensity of the mobile terminal.

The processor 202 is configured to inversely adjust the brightness of the button lamp 203 of the mobile terminal with respect to the detected ambient light intensity according to the detected ambient light intensity.

The button light 203 is configured to display the brightness of the processor that is inversely adjusted with respect to the detected ambient light intensity according to the processor.

With the above mobile terminal, the button lamp is adaptively adjusted, and in the case where the ambient light intensity changes, the brightness of the button lamp is reversely adjusted according to the detected ambient light intensity, and the movement is reduced. Terminal power consumption, extending the life of mobile terminals.

Preferably, the processor 202 is configured to:

The brightness of the button lamp 203 of the mobile terminal is reversely adjusted according to the formula Y=S*((Levelbase-Level)*N+M), where Y represents the brightness of the button lamp 203, and Levelbase is the ambient light intensity threshold, and Level is The detected ambient light intensity, M is the compensation coefficient, N is the intensity coefficient of the ambient light intensity converted into the ambient light level, and S is the coefficient of the ambient light level converted into the actual display brightness.

Wherein, the value of M is a real number in the range [0, 1]; the value of N is a real number in the range of (0, 1); the value of S is an integer in the range of (0, 255).

Based on any of the above mobile terminal embodiments, preferably, when the brightness of the button light 203 of the mobile terminal is automatically adjusted, the ambient light intensity sensor 201 detects the ambient light intensity of the mobile terminal.

Preferably, the mobile terminal further includes a display screen. When the manner of adjusting the button light 203 of the mobile terminal and the display screen of the mobile terminal are manually adjusted, the ambient light intensity sensor 201 stops detecting the environment where the mobile terminal is located. brightness.

Based on any of the foregoing mobile terminal embodiments, preferably, when the ambient light intensity detected by the ambient light intensity sensor 201 is less than a predetermined ambient light intensity threshold, and the button light 203 is in an on state, the processor 202 is configured to detect the ambient light. The intensity inversely adjusts the brightness of the button lamp 203 of the mobile terminal with respect to the detected ambient light intensity.

Based on any of the above mobile terminal embodiments, preferably, when the ambient light intensity detected by the ambient light intensity sensor 201 is greater than a predetermined ambient light intensity threshold, the processor 202 turns off the button light 203.

Based on any of the above method embodiments, preferably, if the processor 202 receives the control command within a predetermined time Keep the button light on.

When the button light 203 is turned on for a predetermined time, and the processor 202 does not receive the control command during the time of the turn-on, the button light is turned off.

If the time difference between the time when the control command is received and the time when the control command was received does not reach the predetermined time threshold, the time when the button light is turned on is re-timed from the time when the control command is received.

The embodiments of the present invention are specifically described below in conjunction with application scenarios.

Take the FFOS (Firefox Operating System) mobile phone as an example, and the mobile phone includes an ambient light intensity sensor, a processor, a button light, and an LCD (Liquid Crystal Display) screen.

It is necessary to adjust the brightness of the backlight of the LCD screen and the brightness of the button light separately. When the backlight brightness adjustment mode of the LCD screen and the brightness adjustment mode of the button light are manually adjusted, the ambient light intensity sensor is turned off, and in other cases, the ambient light intensity sensor is turned on, as shown in FIG. 3 (Fig. 3 It is shown as the corresponding relationship between the button light adjustment mode and the LCD backlight adjustment mode and the ambient light intensity sensor state).

If the processor determines that the button light is manually adjusted, when the control command is received, the brightness of the display button light is a manually preset brightness value, and the control command is not received after the display reaches a predetermined time. When the button light is turned off.

If the method of automatically adjusting the button light is selected, the ambient light intensity sensor is turned on to detect the ambient light intensity of the mobile phone. The ambient light intensity sensor can periodically send the detected ambient light intensity to the processor, or send the detected ambient light intensity to the processor when the button light is turned on, and can also send the ambient light intensity sent by the processor. When the command is issued, the ambient light intensity is detected.

In the embodiment of the present invention, an ambient light intensity sensor periodically sends ambient light intensity to the processor as an example, and an implementation step of automatically adjusting the brightness of the button light is illustrated, as shown in FIG. 4 .

Step 401: Determine whether the received ambient light intensity is greater than a preset ambient light intensity threshold. If yes, go to step 406. If no, go to step 402.

Step 402: Determine whether a control command is received. If yes, go to step 403. If no, go to step 404. Step 403: Perform step 405 according to the received ambient light intensity to reversely adjust the brightness of the button light relative to the ambient light intensity when the time when the control command is received does not reach the predetermined time.

The foregoing step 403 specifically includes:

If the button light is on, the time difference between the time when the control command is received and the last time the control command is received does not reach the predetermined time, and the time is counted from the time when the control command is received, when the predetermined time is not reached. According to the received ambient light intensity, the brightness of the button light is reversely adjusted relative to the ambient light intensity. If the button light is off, the time difference between the time when the control command is received and the last time the control command is received has reached the predetermined time threshold, and the time is counted from the time when the control command is received, and the predetermined time is not reached. At the time, the brightness of the button light is inversely adjusted with respect to the ambient light intensity according to the received ambient light intensity.

Step 404: Perform step 405 according to the received ambient light intensity to reversely adjust the brightness of the button light relative to the ambient light intensity when the last time the control command is received does not reach the predetermined time.

The above step 404 specifically includes:

If the button light is turned on, the time when the control command was last received has reached a predetermined time, and the brightness of the button lamp is inversely adjusted according to the received ambient light intensity with respect to the received ambient light intensity;

If the button light is off, the last time the control command was received has reached the predetermined time, and the button light is turned off.

Step 405: When the button light is turned on for a predetermined time and the control command is not received, the button light is turned off.

If the time difference between the time when the control command is received and the time when the control command was received does not reach the predetermined time, the time when the button light is turned on is re-timed from the time when the control command is received.

Step 406: When the button light is turned on, the button light is turned off, and when the button light is turned off, the button light is turned off.

According to the received ambient light intensity, the brightness of the button light is reversely adjusted with respect to the received ambient light intensity, and the following manner can be utilized:

The brightness of the button light of the mobile terminal is reversely adjusted according to the formula Y=S*((Levelbase-Level)*N+M), where Y represents the brightness of the button light, Levelbase is the ambient light intensity threshold, and Level is received. Ambient light intensity, M is the compensation coefficient, N is the intensity coefficient of the ambient light intensity converted to the ambient light level, and S is the coefficient of the ambient light level converted to the actual display brightness.

Wherein, the value of M is a real number in the range [0, 1]; the value of N is a real number in the range of (0, 1); the value of S is an integer in the range of (0, 255). The specific value is based on the actual value. In the embodiment of the present invention, the value of S is 255, the value of M is 0.3, and the value of N is 0.1.

The implementation steps of manually adjusting the brightness of the button lamp will be described below with reference to the accompanying drawings, as shown in FIG.

Step 501: Determine whether a control command is received. If yes, go to step 502. If no, go to step 503. Step 502: The brightness of the button light is displayed as a predetermined brightness value when the time when the control command is received is not reached within a predetermined time. Go to step 504.

The foregoing step 502 specifically includes:

If the button light is on, the time difference between the time when the control command is received and the last time the control command is received does not reach the predetermined time, and the time from the time when the control command is received is started, and it is determined that the predetermined time has not been reached. When the brightness of the button light is displayed, it is a predetermined brightness value. If the button light is off, the time difference between the time when the control command is received and the last time the control command is received has reached the predetermined time threshold, and the time is counted from the time when the control command is received, and the predetermined time is not reached. At the time of time, the button light is turned on, and the brightness of the button lamp is displayed as a predetermined brightness value.

Step 503: The brightness of the button light is displayed as a predetermined brightness value when the last time the control command is received does not reach the predetermined time. Go to step 504.

If the button light is on, the time when the control command was last received does not reach the predetermined time, and the brightness of the display button light is a predetermined brightness value;

Step 504: When the button light is turned on for a predetermined time and the control command is not received, the button light is turned off.

The manual adjustment of the button light can be achieved by the method provided above.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions are provided for implementing one or more processes and/or block diagrams in the flowchart The steps of the function specified in the box or in multiple boxes.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and modifications of the inventions

Claims

Rights request

1. A method for adjusting the button light of a mobile terminal, which is characterized by including:

Detect the ambient light intensity where the mobile terminal is located;

According to the detected ambient light intensity, the brightness of the key light of the mobile terminal is adjusted inversely relative to the detected ambient light intensity.

2. The method of claim 1, wherein the step of reversely adjusting the brightness of the key light of the mobile terminal relative to the detected ambient light intensity according to the detected ambient light intensity specifically includes:

According to the formula Y=S*((Levelbase-Level)*N+M), the brightness of the key light of the mobile terminal is reversely adjusted, where Y represents the brightness of the key light, Levelbase is the ambient light intensity threshold, and Level is the detected The ambient light intensity of , M is the compensation coefficient, N is the intensity coefficient that converts ambient light intensity into ambient light level, and S is the coefficient that converts ambient light level into actual display brightness.

3. The method of claim 2, wherein the value of M is a real number in the range of [0, 1]; the value of N is a real number in the range of (0, 1]; the value of S is An integer in the range (0, 255].

4. The method according to any one of claims 1 to 3, wherein detecting the ambient light intensity where the mobile terminal is located specifically includes:

When the adjustment mode of the key light of the mobile terminal is automatic adjustment, the ambient light intensity where the mobile terminal is located is detected.

5. The method according to any one of claims 1 to 3, characterized in that, according to the detected ambient light intensity, the brightness of the key light of the mobile terminal is reversely adjusted relative to the detected ambient light intensity, Specifically include:

When the detected ambient light intensity is less than the predetermined ambient light intensity threshold and the key light is on, the brightness of the key light of the mobile terminal is reversed relative to the detected ambient light intensity according to the detected ambient light intensity. adjust.

6. The method of claim 4, wherein after detecting the ambient light intensity where the mobile terminal is located, the method further includes: when the detected ambient light intensity is greater than a predetermined ambient light intensity threshold , then turn off the key light.

7. A mobile terminal, characterized in that it includes: an ambient light intensity sensor, a processor and a button light; the ambient light intensity sensor is used to detect the ambient light intensity where the mobile terminal is located;

The processor is configured to reversely adjust the brightness of the key light relative to the detected ambient light intensity according to the ambient light intensity detected by the ambient light intensity sensor;

The button light is used to display the brightness after the processor reversely adjusts the brightness relative to the detected ambient light intensity.

8. The mobile terminal according to claim 7, wherein the processor is configured to: The brightness of the key light is reversely adjusted according to the formula Y=S*((Levelbase-Level)*N+M), where Y represents the brightness of the key light, Levelbase is the ambient light intensity threshold, and Level is the detected Ambient light intensity, M is the compensation coefficient, N is the intensity coefficient that converts ambient light intensity into ambient light level, and S is the coefficient that converts ambient light level into actual display brightness.

9. The mobile terminal of claim 8, wherein the value of M is a real number in the range [0, 1]; the value of N is a real number in the range CO, 1]; the value of S is is an integer in the range CO, 255].

10. The mobile terminal according to any one of claims 7 to 9, wherein when the key light of the mobile terminal is adjusted automatically, the ambient light intensity sensor detects that the mobile terminal The ambient light intensity.

11. The mobile terminal according to any one of claims 7 to 9, wherein when the ambient light intensity detected by the ambient light intensity sensor is less than a predetermined ambient light intensity threshold and the button light is on, The processor reversely adjusts the brightness of the key light of the mobile terminal relative to the detected ambient light intensity according to the detected ambient light intensity.

12. The mobile terminal of claim 11, wherein when the ambient light intensity detected by the ambient light sensor is greater than a predetermined ambient light intensity threshold, the processor turns off the key light.