CN101098354A - Handhold electronic device and method capable of auto-adjusting backlight brightness - Google Patents

Handhold electronic device and method capable of auto-adjusting backlight brightness Download PDF

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Publication number
CN101098354A
CN101098354A CNA2006100362987A CN200610036298A CN101098354A CN 101098354 A CN101098354 A CN 101098354A CN A2006100362987 A CNA2006100362987 A CN A2006100362987A CN 200610036298 A CN200610036298 A CN 200610036298A CN 101098354 A CN101098354 A CN 101098354A
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CN
China
Prior art keywords
brightness
default value
value
electric device
luminance signal
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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CNA2006100362987A
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Chinese (zh)
Inventor
洪顺成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitac Computer Shunde Ltd
Shunda Computer Factory Co Ltd
Mitac International Corp
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Mitac Computer Shunde Ltd
Mitac International Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitac Computer Shunde Ltd, Mitac International Corp filed Critical Mitac Computer Shunde Ltd
Priority to CNA2006100362987A priority Critical patent/CN101098354A/en
Publication of CN101098354A publication Critical patent/CN101098354A/en
Pending legal-status Critical Current

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Abstract

A hand-held electric device which can automatically adjust back light brightness is provided with a key module, a key back light module, a back light driver for driving the key back light module, a light sensor for sensing external brightness, and a microprocessor for operating the whole device. When the key module is operated, and the external brightness is higher than one first default value, the microprocessor orders the back light driving module to forbid the key back light module, and when the external brightness is not higher than the first default value, the microprocessor orders the back light drive module to drive the key back light module to save energy.

Description

Tool is adjusted the portable electric device and the method for backlight illumination automatically
[Ji Intraoperative field]
The invention relates to a kind of portable electric device and control method thereof of tool backlight function, be meant that especially a kind of tool adjusts the portable electric device and the method for backlight illumination automatically.
[Bei Jing Ji Intraoperative]
Along with the progress of science and technology and the lifting of manufacturing technology, the various portable electric devices of being convenient to carry are pushed out one after another, for example mobile phone, personal digital assistant or the like.Consider that the user may use portable electric device in dark environment, today some style portable electric device in can set up a key backlight module, operate portable electric device in the user and illuminate button, the function and the position of each button of the clear identification of auxiliary user, and then handled easily.Again, the information that shows on the display of portable electric device also may be crossed bright and difficult recognition because of insufficient light or external environment, so today, most portable electric device also can be provided with a display backlight module, illuminates display when the user operates.So, portable electric device utilizes keyboard back light module and display backlight Module Design, and the user can discern the position of button and the information on function and the reading display easily.
The backlight module light and shade of surrounding environment no matter in the existing portable electric device is as long as backlight module will be lighted when the user operates.So, if during the luminance shortage of surrounding environment, the backlight module of lighting can help the user; Yet if during bright surroundings, the backlight module of lighting may can do nothing to help the user, and key backlight module for example but consumes the limited electric power of portable electric device, causes the user to need frequent charge or changes battery, and then cause the inconvenience used.
[summary of the invention]
Therefore, purpose of the present invention is promptly providing a kind of tool that reaches the power saving effect to adjust the portable electric device and the method for backlight illumination automatically.
For reaching above-mentioned purpose, tool of the present invention is adjusted the portable electric device of backlight illumination automatically, comprises a display, a usefulness for key-press module, a key backlight module, a backlight driving unit, a photosensitive unit and the microprocessor of user's operation with input control order; Wherein, backlight driving unit is in order to produce one first drive signal to drive this key backlight module work; Photosensitive unit is in order to brightness of sensing external environment and the corresponding luminance signal that produces; And microprocessor is in order to plan as a whole the running of this portable electric device, and when this key-press module is operated, receive the luminance signal of this photosensitive unit, and when the brightness value of this luminance signal is higher than one first default value, make this backlight driving unit not produce this first drive signal, when not being higher than this first default value, make this backlight driving unit produce this first drive signal to order about this key backlight module work with brightness value in this luminance signal.
[description of drawings]
Fig. 1 adjusts the schematic diagram of the portable electric device preferred embodiment of backlight illumination automatically for tool of the present invention.
Fig. 2 is the Organization Chart of present embodiment.
Fig. 3 is a flow chart of adjusting the backlight illumination method in the present embodiment automatically.
[embodiment]
Cooperate Fig. 1 and Fig. 2, the portable electric device 1 that tool of the present invention is adjusted backlight illumination automatically comprises a housing 10, a display 11, a display backlight module 12, a key-press module 13, a key backlight module 14, a backlight driving unit 15, a photosensitive unit 16 and a microprocessor 17.In addition, the portable electric device 1 of present embodiment has more the essential member of mobile phone, for example battery 100 of the radio-frequency module 18 of execution transmitting-receiving and processing wireless signal, sound coder 19, earphone 191, microphone 192, supply portable electric device 1 work required electric power or the like.
Housing 10 is in order to member 11 ~ 19,191,192,100 ccontaining and location portable electric device 1.Display 11 is the first half that a LCD is embedded at the upper surface of housing 10 in this example, and key-press module 13 has most buttons and be laid in the Lower Half of housing 10 upper surfaces.Display 11 is in order to show relevant information, and for example, caller ID, short message content or the like are watched for the user; And key-press module 13 is operated with input control order to portable electric device 1 for the user.
Key backlight module 14 corresponding key-press modules 13 are arranged in the housing 10, for example are arranged on the circuit board of key-press module 13 (not shown).12 of display backlight modules are to be arranged in the housing 10 position corresponding with display 11, for example are arranged at below the panel of display 11.Display backlight module 12 is some light-emitting diodes with key backlight module 14 in this example, for example is respectively 4 white lights or blue light-emitting diode and constitutes.
Backlight driving unit 15 is subjected to microprocessor 17 controls to produce one in real time and drives first drive signal of key backlight module 14 and second drive signal of a driving display backlight module 12.First, second drive signal of this example can be a current signal.
Moreover, when in dark surrounds, only need fainter brightness can allow the user see corresponding informance on key-press module 13 and the display 11 clearly, excessive brightness can cause the uncomfortable of user's eyes and waste power supply on the contrary; But, need the higher brightness beginning can allow the user see corresponding informance on key-press module 13 and the display 11 clearly at dim environment.Therefore, the portable electric device 1 of present embodiment is more adjusted the brightness of display backlight module 12 and key backlight module 14 in good time with the dim degree (referring to brightness value) of surrounding environment.
Thereby, the intensity of first, second drive signal that this routine backlight driving unit 15 is produced more can increase and decrease with the control of microprocessor 17, and higher with the intensity of first, second drive signal, for example current value is higher, and key backlight module 14 is higher with the brightness of display backlight module 12.
Photosensitive unit 16 is arranged in the housing 10 and in order to the brightness of sensing external environment, produces a luminance signal with correspondence and be sent to microprocessor 17.Moreover the position that is provided with of corresponding photosensitive unit 16 more forms a transmittance section 101 in the wall of housing 10, and the light of external environment can be projected on the photosensitive unit 16 through transmittance section 101.Therefore, photosensitive unit 16 has a photo-sensitive cell 161 in this example, and for example a photo resistance or an optical diode produce the luminance signal that includes different brightness values with the brightness correspondence with external environment.In addition, this routine photosensitive unit 16 has more an analog/digital converter 162, to handle being sent to microprocessor 17 after the luminance signal digitlization.Though, be provided with analog/digital converter 162 in this routine photosensitive unit 16 with the luminance signal digitlization, yet, originally just has analog/digital converter in the portable electric device 1, for example in the radio-frequency module 18, so luminance signal also can be handled by existing analog/digital converter in the portable electric device 1, photosensitive unit 16 also can not be provided with analog/digital converter 162.
Microprocessor 17 is arranged in the housing 10 and in order to plan as a whole the running of portable electric device 1.When key-press module 13 is operated, when for example being pressed, microprocessor 11 can be from the sensitization unit 16 receives luminance signals and with luminance signal and one first default value and the comparison of one second default value, wherein, second default value is lower than first default value, and the numerical value of first default value decides with the bright surrounding environment brightness that need not light key backlight module 14, and second default value decides with the brightness that need light the dim surrounding environment of key backlight module 14 fully.When the brightness value of luminance signal is higher than first default value, mean bright surroundings, microprocessor 17 makes backlight driving unit 15 not export first drive signal, causes key backlight module 14 not worked (referring to not light); When the brightness value of luminance signal is not higher than first default value but is higher than second default value, mean that surrounding environment is dim, microprocessor 17 makes backlight driving unit 15 output intensities be higher than a desired value first drive signal of (referring to be enough to make backlight module 14,12 complete bright intensity), to light key backlight module 14, make key backlight module 14 bright entirely, assist user's operation push-button module 13 so that enough light quantities to be provided; When the brightness value of luminance signal is not higher than second default value, mean the surrounding environment dark, microprocessor 17 makes backlight driving unit 15 output intensities be lower than first drive signal of desired value, makes key backlight module 14 little bright, to avoid causing the discomfort and saving power supply of user's eyes.
Moreover when display 11 promptly was convenient to bright surroundings, display backlight module 14 still needed work to assist the user to watch information on the display 11 so that light source to be provided.Therefore, in the present embodiment, when user's operation push-button module 13, when if luminance signal is higher than second default value, mean bright surroundings or dim, microprocessor 15 makes backlight driving unit 15 output intensities be higher than second drive signal of desired value, to light display backlight module 12, assists the user to watch information on the display 11; If luminance signal is not higher than second default value, mean the surrounding environment dark, microprocessor 17 makes backlight driving unit 15 output intensities be lower than second drive signal of desired value, causes display backlight module 12 little bright, to avoid causing the discomfort and saving power supply of user's eyes.
According to preceding described member and correlation, cooperate Fig. 3 that the automatic adjustment backlight illumination method of present embodiment portable electric device 1 is described.The method of present embodiment is performed when key-press module 13 is operated by the user.
At first, in step 21, microprocessor 17 can read luminance signal from sensitization unit 16 earlier, so that brightness value and first and second default value of luminance signal are made comparisons.
Secondly, judge in step 22 whether the brightness value of luminance signal is higher than first default value.When being higher than first default value as if the brightness value of judging luminance signal in the step 22, represent bright surroundings, execution in step 23, microprocessor 17 makes backlight driving unit 15 not export second drive signal that first drive signal and output intensity are higher than desired value, causes key backlight module 14 not lighted with display backlight module 12 and lights.Otherwise, when not being higher than first default value, continue execution in step 24 as if the brightness value of judging luminance signal in the step 22.
In step 24, judge whether the brightness value of luminance signal is higher than second default value.When being higher than second default value as if the brightness value of judging luminance signal in the step 24, represent surrounding environment dim, execution in step 25, microprocessor 17 makes backlight driving unit 15 outputs be higher than first, second drive signal of desired value, to light key backlight module 14 and display backlight module 12, assist user's operation push-button module 13 and the information of reading on the display 11.
Otherwise, if step 24 is judged when the brightness value of luminance signal is not higher than second default value, represent the surrounding environment dark, execution in step 26, microprocessor 17 makes backlight driving unit 15 outputs be lower than first, second drive signal of desired value, make key backlight module 14 and display backlight module 12 little bright, to avoid causing the discomfort and saving electric power of user's eyes.
It should be noted, though in the present embodiment, only utilize second default value to separate key backlight module 14 and 12 brightness of display backlight module, but more can set up more default value and come the corresponding brightness of adjusting backlight module 14,12, even can allow the brightness of backlight module 14,12 higher and lower with the brightness of surrounding environment, should not be subject to present embodiment and disclose.
According to preceding described, tool of the present invention is adjusted the portable electric device 1 of backlight illumination automatically can close key backlight module 14 in good time when bright surroundings, to save active power.Again, portable electric device 1 of the present invention more can make key backlight module 14 and display backlight module 12 little bright when surrounding environment is dark, to avoid causing the discomfort of human eye, reaches and further saves electric power.So, utilize the design of power saving of the present invention, can allow prolong the service time of portable electric device 1, and then reduce the frequency of changing battery and charging, with more convenient to use.

Claims (9)

1, a kind of tool is adjusted the portable electric device of backlight illumination automatically, comprises:
One display;
One key-press module is used for user's operation with input control order;
One key backlight module;
One backlight driving unit, in order to producing one first drive signal driving this key backlight module;
One photosensitive unit is in order to brightness of sensing external environment and the corresponding luminance signal that produces; And
One microprocessor, in order to plan as a whole the running of this portable electric device, and when this key-press module is operated, receive the luminance signal of this photosensitive unit, and when the brightness value of this luminance signal is higher than one first default value, make this backlight driving unit not produce this first drive signal, when not being higher than this first default value, make this backlight driving unit produce this first drive signal to order about this key backlight module work with brightness value in this luminance signal.
2, portable electric device as claimed in claim 1, it is characterized in that: the intensity of this first drive signal is higher, the brightness of this key backlight module is higher, when the brightness value of this luminance signal is not higher than this first default value and is higher than one when being lower than second default value of this first default value, this microprocessor makes the intensity of this first drive signal of this backlight driving unit be higher than a desired value, and when the brightness value of this luminance signal was not higher than this second default value, this microprocessor made the intensity of this first drive signal of this backlight driving unit be lower than this desired value.
3, portable electric device as claimed in claim 2, it is characterized in that: this portable electric device also comprises a display backlight module, and this backlight driving unit is worked to drive this display backlight module to produce one second drive signal by this microprocessor control more, when the brightness value of this luminance signal is higher than this second default value, the intensity that this microprocessor makes this backlight driving unit produce this second drive signal and this second drive signal is higher than this desired value, and when the brightness value of this luminance signal was not higher than this second default value, the intensity that this microprocessor makes this backlight driving unit produce this second drive signal and this second drive signal was lower than this desired value.
4, portable electric device as claimed in claim 1 is characterized in that: this photosensitive unit have one in order to the brightness of sensing external environment and the corresponding photosensory assembly and of this photoreceptor signal that forms with the digitized analog/digital converter of this photoreceptor signal.
5, portable electric device as claimed in claim 4 is characterized in that: this photo-sensitive cell is an optical diode.
6, portable electric device as claimed in claim 4 is characterized in that: this photo-sensitive cell is a photo resistance.
7, a kind of automatic adjustment backlight illumination method of portable electric device comprises following steps:
(A) when this portable electric device is operated by the user, read the luminance signal of a corresponding external environment brightness;
(B) this luminance signal and one first default value are compared;
(C), drive a key backlight module of this portable electric device if when the brightness value of this luminance signal is not higher than this first default value; And
(D) if when the brightness value of this brightness value is higher than this first default value, key backlight module in this portable electric device of forbidden energy.
8, the automatic adjustment backlight illumination method of portable electric device as claimed in claim 7, it is characterized in that: second default value that more brightness value and of this luminance signal is lower than this first default value in this step (B) is made comparisons, and in this step (C), when being higher than this second default value if the brightness value of this luminance signal is not higher than this first default value, drive this key backlight module, and if the brightness value of this luminance signal is not higher than this second default value, drive this key backlight module, the brightness of this key backlight module when being higher than this second default value but the brightness of this key backlight module is lower than that brightness value when this luminance signal is lower than this first default value.
9, the automatic adjustment backlight illumination method of portable electric device as claimed in claim 8, it is characterized in that: in step (C), when if the brightness value of this luminance signal is higher than this second default value, drive a display backlight module of this portable electric device, when if the brightness value of this luminance signal is not higher than this second default value, drives this display backlight module but make the brightness of this display backlight module be lower than the brightness of this display backlight module when the brightness value of this luminance signal is higher than second default value.
CNA2006100362987A 2006-06-30 2006-06-30 Handhold electronic device and method capable of auto-adjusting backlight brightness Pending CN101098354A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2006100362987A CN101098354A (en) 2006-06-30 2006-06-30 Handhold electronic device and method capable of auto-adjusting backlight brightness

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Application Number Priority Date Filing Date Title
CNA2006100362987A CN101098354A (en) 2006-06-30 2006-06-30 Handhold electronic device and method capable of auto-adjusting backlight brightness

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CN101098354A true CN101098354A (en) 2008-01-02

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102630036A (en) * 2012-04-01 2012-08-08 深圳超多维光电子有限公司 Three-dimensional display device and method for controlling display brightness of display screen thereof
CN103179748A (en) * 2013-02-04 2013-06-26 广东美的制冷设备有限公司 Remote control, and backlight control method and backlight control system thereof
CN103402287A (en) * 2013-07-22 2013-11-20 珠海市魅族科技有限公司 Press key backlight brightness control method and handheld terminal
CN111785218A (en) * 2020-07-17 2020-10-16 昆山龙腾光电股份有限公司 Electronic equipment and backlight brightness adjusting method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102630036A (en) * 2012-04-01 2012-08-08 深圳超多维光电子有限公司 Three-dimensional display device and method for controlling display brightness of display screen thereof
CN102630036B (en) * 2012-04-01 2016-02-17 深圳超多维光电子有限公司 Stereoscopic display device and control the method for its display screen display brightness
CN103179748A (en) * 2013-02-04 2013-06-26 广东美的制冷设备有限公司 Remote control, and backlight control method and backlight control system thereof
CN103402287A (en) * 2013-07-22 2013-11-20 珠海市魅族科技有限公司 Press key backlight brightness control method and handheld terminal
CN103402287B (en) * 2013-07-22 2016-08-10 魅族科技（中国）有限公司 The control method of key-press backlight brightness and handheld terminal
CN111785218A (en) * 2020-07-17 2020-10-16 昆山龙腾光电股份有限公司 Electronic equipment and backlight brightness adjusting method
CN111785218B (en) * 2020-07-17 2022-03-25 昆山龙腾光电股份有限公司 Electronic equipment and backlight brightness adjusting method

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