200923637 九、新型說明： 【新型所屬之技術領域】 置，特別是指一種 本創作係有關於一種手持式電子裝 具有省電功能之手持式電子裝置。 【先前技術】 現代人触雖獨冑訊，為了賴_概地取 訊和應用資訊，讀錢子裝置已逐漸縣現代人生活中 ^可或缺的-部分，#見的補式電子裝置的偏產品包 ，手機、PDA、衛星導航系統(俗稱Gps)，均具有一顯示面 板和鍵盤，而顯示面板必須透過背光模組才能夠顯示畫 面’而當鍵盤受到觸壓時也會發出LED光源。 由於背光模組以及LED光源的耗電量佔手持式電子裝 置總耗電量相當大的—個關，斜持式電子裝置的電力 供應主要來自於電池，電池的電量耗盡就必需更換，在使 用上相當^方便。因此若要延長傾式電子裝置的使用時 間除了一方面要提高電池的容量，另一方面也要能夠提升 省電效能。 ， 針對於省電效能的提升方案，目前的手持式電子裝置 主要是透過省電模式或是手動調整方式，在省電模式的狀 況下，當使用者一段時間不使用手持式電子裝置時，自動 關閉背光模組和鍵盤之LED光源以達到省電的目的，但在 這之前’所有的光源的亮度固定，無法隨外界的亮度做光 線補償或調整，若光源亮度過高則形成電源的浪費，若光 源亮度過低則不易辨識，此外也會造成視覺上的不適。 目前市面上所見的GPS衛星定位系統大多是以手動方 200923637 ίΙΐΓΓ至日間模式或夜間模式，在日間模式下，外 ^線充足，GPS背細_亮餘小，相反地，在夜間 較暗，GPS背光模組的亮度較大。但若 中通顧道，或是長途旅行的過程中經過 ，和,，，、狀變化，駕㈣通常必須—邊醇—邊以手動 I切換光雜式，這樣的行為絲會危害到駕車的安全。 ㈣=，若麟針騎述缺點，提出—種賴自動感應 外界光源之手赋電子裝置，並触外界錢亮度調整其 背光模組亮度和控制其鍵盤LED之開關，不僅能夠節省手 持式電子裝置德電量’更簡雌村面 最佳的視覺舒適度。 J 【新型内容】 ，本創作之主要目的在於提供—種具有省電功能之手持 式電子裝置’其可則〔合外界光源亮度1^自動調整背光模 組το度以及控制鍵盤LED之開關，進而達到省電之目的。' 為了達到上述之目的，本創作所揭露之手持式電子裝 置包括·一顯示面板、一背光模組、一鍵盤、一光敏電組、 一類比數位轉換器以及一微處理器。 顯示面板可顯示各種不同的資訊，但由於其不具有發 光性，因此必須藉由背光模組輸出之背光才能夠顯示資A 訊，而鍵盤具有複數個按鍵可供使用者輸入訊息或命令， 其内部設有複數個LED ’ LED所發出之光源可以照亮鍵盤， 以便使用者能夠清楚且正確地按壓按鍵。 200923637 本創作之最大魏録手料電子灯之表面設置 光敏電阻，該光敏電組之-端魏過—參考電_^至一 電壓源⑽）’其另-端接地(_，光敏電_最大特性 為其阻抗射奴亮度献比，因此呵㈣料界之光 源亮度並產生相對應之阻抗。 類比數位轉換器係與該光敏電阻並聯，其一端同樣透 過該參考餘_至該龍源，其另—端設有複數個輸出 點’上述輸出點係連接至該微處理器之通用輸出入接腳 (GPI0) ’其中該參考電阻可依據該光敏電阻的阻抗值，分 定額之電魅細比數轉換！！，__數位轉換 器可以比較該電壓源的輸入電壓與一參考電壓之差異，並 將差異程度轉換成_數位訊號，透過上述輸出輯出至該 微處理H ’而該微處理H則是依據該數位訊號產生相對應 之控制信號，調整背光模組的亮度或是控制鍵盤之LE:D開 關0 由上述說明可知，本創作所提供之手持式電子裝置可 依據外界光源自動調整其背光模組的亮度以及控制LED之 開關，確實可以達到減少電池消耗之功能，進行達到省電 之效果。 為使本創作之優點及精神能更進一步被揭示，茲配合 圖式作一詳細說明如後。 【實施方式】 請參閱圖一所示，其係為本創作之具有省電功能之手 持式電子裝置之一實施例示意圖，圖中手持式電子裝置i 可以是手機、PDA、GPS等，其外部元件包括一顯示面板η、 200923637 一鍵盤12以及-光敏電阻13,其内部元件詳見圖二說明。 員示面板11為液晶面板，可以顯示各種資訊以供 使用，然而，由於其不具有自行發光之功能，因此 必須藉由-背光模組（圖中未示)提供所需之背光源；鍵盤 12具有複數個按鍵可供使用者輸人訊息或命令，其内部設 有複數個LED(圖中未示）可發出光源並照亮鍵盤12，以便 使用者能夠清楚且正_地遞缝；光敏電阻13所使用 的材質^要為硫化録(GDS)，設於手持式電子裝置^之表 面丄其阻抗與受光之亮度成反比，因此可以感應外界之光 源儿度並產生相對叙阻抗，進而朗背細組的亮 度和控制鍵盤led的開關。 凊參_二獅，錢為摘狀具有省電功能之手 、’電子裝置之-實蘭彡縣翻，包括—光敏電組 …類比數位轉換器22、-微處理器23、一背光模組 24、複數個LED 25以及一電壓源26(VDD)。 電屢源26(VDD)具有-參考電阻28，光敏電阻21的 二端係轉接該參考電阻28，其另一端接地27(_，類比 =轉換器22與該光敏電阻21並聯，其一端係編妾該參 电阻28 ’其另—端設有複數墙ίϋ點，在本實施例令輸 ==四個，其分別為D。，Di，仏，仏，且上述輸出點係 "微處理器23之通用輪出入接腳231 (GPI0)，該背 二=且24以及上述LED 25則分別與該微處理器23電性 並分别提供該液晶面板U以及鍵盤12所需要之光 微處理器23可調整該背光模組24的亮度以及 控制LED 25的開關。 200923637 由於光敏電阻21的阻抗與受光的亮度成反比（如圖三 所不）’當外界亮度改變時其阻抗也會產生相對應的改 變’又由於光敏電阻21與類比數位轉換器22係為並聯關 係’且該參考電阻28具有分壓功能，其可以依據該光敏 電阻21的阻抗值，分配一定額之電壓至該類比數位轉換 器22’其中該參考電阻28的阻抗值為該光敏電阻21之最 大阻抗值的一半，因此當光敏電阻21的阻抗值改變時， 輸入類比數位轉換器22之電壓也會產生相對應之變化， 此時類比數位轉換器22只要比較輸入電壓和一參考電壓 的差異’並將差異程度轉換成—數位訊號，便可以透過上 述輸出點輸出至該微處理器23，而該微處理器23則是依 據该數位訊號產生相對應之控制信號，調整背光模組24 的亮度或是控制鍵盤LED 25開關。 請參晒四A和四B所示，其係為本卿之數位類比 轉，器依據外界亮度之差異所輸出之數位訊號之實施例 不意圖’在圖四A中，四個輸出點D。，Di，D2，D3所輸出 之=號均做為鋪f細組24亮度之贿，其可以將背 光模組24的亮度在暗至亮之間分成16辦級。在圖四B 中，^之輸出點係做為控制鍵盤之LED 25開關用途，當 外界亮度高於_定程度_所輸出之訊號，例如輸出〇田， 閉鍵盤之LED 25，反之，例如輸出i，則代表開啟 Ρ 1Γ25，在圖四B的情況T，無論LED25是在開啟 麵狀態下，均只有Dl，D2，D3三個輸出點做為調 老，24亮度之用途，因此，在鹏開啟的狀能 下’月光模組24的亮度將在某—亮度區間區分成8個; 200923637 級，而在LED25關閉的狀態下，背光模組24的亮度將在 另一個亮度區間區分成8個等級。 對於外界亮度大小的定義方式，本_魏據電麗源 26(VDD)輸入之數位類比轉換器22之電壓值定義之，由於 光敏電阻21其阻抗健外界亮度息息細，而當光敏電 ，21的阻抗值改變，電壓源26⑽)輸入至數位類比轉換 器22之電壓也會改變，因此，前述雖然提到聰5之開、 關係依據外界亮度而改變，但外界亮度的變化會造成數位 類比轉換器22之電壓值同步改變，因此實際控制^^扛 之開關則是依據輸入至數位類比轉換器22之電壓值而定。 由上述說明可知，本創作之手持式電子裝置可依據外 界光源自動調整其背光模組的亮度以及控制鍵盤⑽之開 關，相較之下，習知技術之手持式電子裝置不但不具有自 動感細整背光模組亮度之魏，也沒有自域光控制鍵 盤led之開關功能，因此，本創作之手持式電子裝置確實 可以減少電池消耗之功能，以達到省電之效果。 以上所述，僅為本創作之一較佳實施例，其並非用以 限制本創狀實施範圍’任何熟習該概藝者依據本創作 之精神所做之些微修改’仍應屬本創作之精神及範圍。 200923637 【圖式簡單說明】 圖一係為本創作之具有省電功能之手持式電子裝置之 一實施例示意圏。 圖二係為本創作之具有省電功能之手持式電子裝置之 一實施例系統架構圖。 、 圖三係為絲電_阻抗與受光的亮度成反比之示意 圖。 圖四A、四β係為本創作之數位類比轉換器依據外界 凴度之差異所輸出之數位訊號之實施例示意圖。 【主要元件符號說明】 卜手持式電子裝置 11〜液晶面板 12〜鍵盤 13〜光敏電阻 2卜光敏電阻. 22〜數位類比轉換器 23〜微處理器 23卜通用輸出入接腳 24〜背光模組 26〜電壓源 28〜參考電阻 D〇，，D2，D3〜鉍山一 25-LED 27~接地 12200923637 IX. New description: [New technical field] It is especially a kind of hand-held electronic device with a power-saving function. [Prior Art] Although modern people touched the news alone, in order to rely on the general information and application information, the reading money device has gradually become a part of the modern life of the county. The partial product package, mobile phone, PDA, and satellite navigation system (commonly known as Gps) all have a display panel and a keyboard, and the display panel must be able to display the picture through the backlight module', and the LED light source is also emitted when the keyboard is touched. Since the power consumption of the backlight module and the LED light source accounts for a considerable amount of power consumption of the handheld electronic device, the power supply of the oblique electronic device mainly comes from the battery, and the battery needs to be replaced when the battery is exhausted. It is quite convenient to use. Therefore, in order to extend the use time of the tilting electronic device, on the one hand, it is necessary to increase the capacity of the battery, and on the other hand, it is also possible to improve the power saving performance. In view of the power saving performance improvement scheme, the current handheld electronic device mainly adopts a power saving mode or a manual adjustment mode, and in the state of the power saving mode, when the user does not use the handheld electronic device for a period of time, automatically Turn off the backlight module and the LED light source of the keyboard to save power, but before that, the brightness of all the light sources is fixed, and the light can not be compensated or adjusted with the external brightness. If the brightness of the light source is too high, the power supply is wasted. If the brightness of the light source is too low, it is difficult to recognize, and it also causes visual discomfort. At present, most of the GPS satellite positioning systems on the market are manually operated from 200923637 ΙΐΓΓ to day mode or night mode. In day mode, the external line is sufficient, the GPS back is thin _ bright and small, and conversely, dark at night, GPS The brightness of the backlight module is large. However, if you pass through the road, or go through the process of long-distance travel, and,,,, change, drive (four) usually must - side alcohol - while manually switching the optical hybrid, such behavior will endanger the driving Safety. (4) =, if the needle rides the shortcomings, it proposes that the electronic device that automatically senses the external light source and adjusts the brightness of the backlight module and controls the switch of the keyboard LED by external brightness, can save the handheld electronic device. De Power's more simple visual comfort for the female village. J [New content], the main purpose of this creation is to provide a hand-held electronic device with power-saving function, which can automatically adjust the brightness of the backlight module and control the switch of the keyboard LED. To achieve the purpose of saving electricity. In order to achieve the above objectives, the handheld electronic device disclosed in the present application comprises a display panel, a backlight module, a keyboard, a photosensitive power pack, an analog-to-digital converter, and a microprocessor. The display panel can display various information, but since it has no illuminance, the backlight must be output by the backlight module, and the keyboard has a plurality of buttons for the user to input messages or commands. A plurality of LEDs are internally provided. The light source emitted by the LED illuminates the keyboard so that the user can press the button clearly and correctly. 200923637 The surface of the largest Wei Lu hand-held electronic lamp of this creation is set with a photoresistor. The photo-electric group has a - terminal Wei - reference power _ ^ to a voltage source (10)) 'the other end of the ground (_, photosensitive _ maximum The characteristic is the ratio of the impedance of the slave, so the brightness of the source of the material is generated and the corresponding impedance is generated. The analog digital converter is connected in parallel with the photoresistor, and one end thereof also passes through the reference _ to the dragon source. The other end has a plurality of output points. The output point is connected to the general-purpose output input pin (GPI0) of the microprocessor. The reference resistor can be divided according to the impedance value of the photoresistor. Number conversion!!, __ digital converter can compare the difference between the input voltage of the voltage source and a reference voltage, and convert the degree of difference into a _ digital signal, which is output to the micro processing H ' through the above output and the micro processing H is based on the digital signal to generate a corresponding control signal, adjust the brightness of the backlight module or control the keyboard LE: D switch 0. As can be seen from the above description, the handheld electronic device provided by the creation can be based on The external light source automatically adjusts the brightness of the backlight module and controls the LED switch, which can really reduce the battery consumption and achieve the effect of saving power. In order to make the advantages and spirit of the creation further revealed, A detailed description is as follows. [Embodiment] Please refer to FIG. 1 , which is a schematic diagram of an embodiment of a handheld electronic device with power saving function. The handheld electronic device i can be a mobile phone. PDA, GPS, etc., its external components include a display panel η, 200923637 a keyboard 12 and a photoresistor 13, the internal components of which are illustrated in Figure 2. The panel 11 is a liquid crystal panel that can display various information for use. Since it does not have the function of self-illumination, it is necessary to provide a desired backlight by a backlight module (not shown); the keyboard 12 has a plurality of buttons for the user to input a message or command, and the internal setting thereof A plurality of LEDs (not shown) can emit a light source and illuminate the keyboard 12 so that the user can clearly and positively sew; the photosensitive resistor 13 is used The quality is required to be the VDS. It is set on the surface of the handheld electronic device. Its impedance is inversely proportional to the brightness of the received light. Therefore, it can sense the external light source and generate relative impedance, and then the brightness of the fine group. And control the keyboard led switch. 凊 _ _ two lions, money for picking the hand with power saving function, 'electronic device - Shilan 彡 county flip, including - photosensitive electric group... analog digital converter 22, - micro processing a backlight module 24, a plurality of LEDs 25, and a voltage source 26 (VDD). The electrical source 26 (VDD) has a reference resistor 28, and the two ends of the photoresistor 21 are switched to the reference resistor 28, The other end is grounded 27 (_, analog = converter 22 is connected in parallel with the photoresistor 21, one end of which is programmed with the reference resistor 28' and the other end is provided with a plurality of walls, in this embodiment, the output == four , which are respectively D. , Di, 仏, 仏, and the above output point is the general wheel input and output pin 231 (GPI0) of the microprocessor 23, and the back two=and 24 and the above-mentioned LED 25 are respectively electrically connected to the microprocessor 23. The optical microprocessor 23 required to provide the liquid crystal panel U and the keyboard 12 respectively can adjust the brightness of the backlight module 24 and control the switches of the LEDs 25. 200923637 Since the impedance of the photoresistor 21 is inversely proportional to the brightness of the received light (as shown in Figure 3), the impedance will also change correspondingly when the external brightness changes, and the photoresistor 21 and the analog-to-digital converter 22 are connected in parallel. The reference resistor 28 has a voltage dividing function, which can distribute a certain amount of voltage to the analog-to-digital converter 22' according to the impedance value of the photoresistor 21, wherein the impedance value of the reference resistor 28 is the photoresistor 21 The maximum impedance value is half, so when the impedance value of the photoresistor 21 changes, the voltage of the analog analog-to-digital converter 22 also changes accordingly, and the analog-to-digital converter 22 only needs to compare the difference between the input voltage and a reference voltage. And converting the degree of difference into a digital signal, which can be output to the microprocessor 23 through the output point, and the microprocessor 23 generates a corresponding control signal according to the digital signal to adjust the backlight module 24 Brightness or control keyboard LED 25 switch. Please refer to Sun 4A and 4B, which is a digital analogy of the present, and the embodiment of the digital signal outputted by the device according to the difference in external brightness is not intended to be in Figure 4A, four output points D. The = number output by Di, D2, and D3 is used as a bribe of the brightness of the group 24, which can divide the brightness of the backlight module 24 into 16 levels between dark and bright. In Figure 4B, the output point of ^ is used as the LED 25 switch for controlling the keyboard. When the external brightness is higher than the signal output, such as outputting the field, the LED of the closed keyboard is 25, and vice versa. i, it means open Ρ 1Γ25, in case B of Figure 4B, no matter whether the LED 25 is in the open surface state, only Dl, D2, D3 three output points are used for the adjustment of the brightness, 24, therefore, in Peng Under the open state, the brightness of the moonlight module 24 will be divided into 8 in a certain brightness interval; 200923637 level, and in the state where the LED 25 is off, the brightness of the backlight module 24 will be divided into 8 in another brightness interval. grade. For the definition of the external brightness level, the voltage value of the digital analog converter 22 is defined by the electric source 26 (VDD) input, since the resistance of the photoresistor 21 is close to the external brightness, and when the photosensitive power is The impedance value of 21 changes, and the voltage input to the digital analog converter 22 of the voltage source 26(10)) also changes. Therefore, although the foregoing refers to the opening of Cong 5, the relationship changes according to the external brightness, but the change of the external brightness causes a digital analogy. The voltage value of the converter 22 changes synchronously, so the actual control switch is based on the voltage value input to the digital analog converter 22. It can be seen from the above description that the handheld electronic device of the present invention can automatically adjust the brightness of the backlight module and control the switch of the keyboard (10) according to the external light source. In contrast, the handheld electronic device of the prior art not only has no automatic feeling. The brightness of the backlight module does not have the switching function of the self-domain light control keyboard. Therefore, the handheld electronic device of the present invention can really reduce the battery consumption function to achieve the effect of power saving. The above is only one preferred embodiment of the present invention, and it is not intended to limit the scope of the present invention. Any minor modifications made by the artist in accordance with the spirit of the present invention should still be the spirit of the present creation. And scope. 200923637 [Simple Description of the Drawings] FIG. 1 is a schematic diagram of an embodiment of a hand-held electronic device having a power saving function. FIG. 2 is a system architecture diagram of an embodiment of the handheld electronic device with power saving function. Figure 3 is a schematic diagram of the electrical impedance _ impedance is inversely proportional to the brightness of the received light. Fig. 4A and Fig. 4 are schematic diagrams showing an embodiment of a digital signal outputted by the digital analog converter of the present invention based on the difference in external temperature. [Main component symbol description] Handheld electronic device 11 to LCD panel 12 to keyboard 13 to photoresistor 2 photosensitive resistor. 22 to digital analog converter 23 to microprocessor 23 general output pin 24 to backlight module 26~voltage source 28~reference resistor D〇,,D2,D3~铋山一25-LED 27~ground 12