TWM377801U - A dual mode mobile and the power supply system therein - Google Patents
A dual mode mobile and the power supply system therein Download PDFInfo
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- TWM377801U TWM377801U TW98218723U TW98218723U TWM377801U TW M377801 U TWM377801 U TW M377801U TW 98218723 U TW98218723 U TW 98218723U TW 98218723 U TW98218723 U TW 98218723U TW M377801 U TWM377801 U TW M377801U
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Description
M377801 五、新型說明: 【新型所屬之技術頜域】 本新型係有關於一種雙模手機,且特別係有關於一種 雙模手機之供電系統。 【先前技術】 * 當前’雙模手機已經越來越受到手機用戶之青睞。雙 •模手機係用戶可以任意選擇使用兩套截然不同之移動網路 鲁之手機。例如,移動通信網路主要有GSM網路、PHS網路 和CDMA網路,那麼雙模手機可以是GSM/pHS組合, GSM/CDMA組合,或者PHS/CDMA組合。使用雙模手機,M377801 V. New description: [New technology jaw domain] This new type is about a dual-mode mobile phone, and especially relates to a dual-mode mobile phone power supply system. [Prior Art] * The current 'dual-mode mobile phone' has become more and more popular among mobile phone users. Dual-mode mobile phone users can choose to use two different mobile networks. For example, the mobile communication network mainly has a GSM network, a PHS network, and a CDMA network, and the dual mode mobile phone can be a GSM/pHS combination, a GSM/CDMA combination, or a PHS/CDMA combination. Using a dual mode phone,
有效地避免了掉話、通話難和音質差等問題。Effectively avoid problems such as dropped calls, difficult calls, and poor sound quality.
雖然這些雙模手機可以在不拔除_卡時,料從一 種移動網路之通信模式切換到另—種移動網路之通信模 式’但是,雙模手機在槿垚 ' 【新型内容】Although these dual-mode phones can switch from one mobile network communication mode to another mobile network communication mode without removing the _ card, the dual-mode mobile phone is in the 槿垚 'new content】
針對現有技術之館抬* _ . 陷’本新型提供了一 4 伊電型之一個方面,提供了—種用於雙模手機之 电、電源模組、第一通信模組、第二通信模 -第一 t?、、且和邏輯控制電路。其中,第-通信模組具有 端.切拖:輪出端;第二通信模組具有第二電位輸出 組間之電性她並且一邏輯控制電路通=組 =給紐連接該第-電位輸出端與第二電位輸出端;」 接顧二端’電性連接電源模組;以及—輸出端,電性連 切換I笛之背光單70,其中,當雙模手機從第"通信模組 二通信模組時,通過邏輯控制電路之第二輸入端 向月光早7G供電,並且保持顯示幕持續點亮。 imc較佳地’雙模手機支援之通信模式是GSM通信網路、 通信網路和CDMA通信網路中任意兩種之组合。對於 2路來說,雙模手機支援之通信模式還可以是 4CDMA通信網路、WCDMA通信網路和cDMA 2〇〇〇 通信網路中任意兩種之組合。 較佳地,如果輸出信號為高電位點亮液晶顯示幕時, 在切換模式下邏輯控制電路之第二輸入信號為高電位。 較佳地’邏輯控制電路是晶片’諸如晶片是TTL之74 系列或CMOS之4000系列晶片。或者,邏輯控制電路是 由分立元件構成之積體電路。 較佳地,當輸出信號為高電位點亮液晶顯示幕時,在 待機狀態之節電模式下邏輯控制電路之第一輸入信號和第 二輸入信號為低電位。 本新型還提供了一種手機,至少包括第一移動網路之 通信模組、不同於第一移動網路之第二移動網路之通信模 M377801 組、供電系統和具有背光單元之顯示幕。其中,供電系統 包括.一電源模紐,一第一通信模組,一第二通信模組, 一切換模組和一邏輯控制電路。第一通信模組具有一第一 電位輸出端。第二通信模組具有一第二電位輸出端。切換 模組用於切換第一通信模組和第二通信模組與電源模組間 之電性連接。邏輯控制電路包括:一第一輸入端、一第二 .輸入端和一輸出端。其中,邏輯控制電路之第一輸入端電 性連接第一電位輪出端與第二電位輸出端。邏輯控制電路 之第二輸入端電性連接電源模組。邏輯控制電路之一輸出 •端電性連接顯示幕之背光單元。 其中’當雙模手機從第一通信模組切換至第二通信模 組時’通過邏輯控制電路之第二輸入端向背光單元供電, 並且保持顯不幕持續點亮。 較佳地,該手機是雙模手機。例如,手機是GSM/PHS 手機、GSM/CDMA手機以及CDma/PHS手機中之任意一 種。對於3G網路來說’手機是td-SCDMA/WCDMA手機、 • WCDMA/CDMA 2000 手機以及 CDMA 2000/TD_SCDMA 手 •機中之任意一種。此外,手機還可以是多模手機。 較佳地’當手機處於切換模式時,邏輯控制電路之輸 出信號向背光單元供電,以點亮液晶顯示幕。 較佳地’當手機處於待機狀態之節電模式時,邏輯控 制電路之輸出信號停止向背光單元供電,從而使液晶顯示 幕熄滅。 * 採用本新型之供電系統,用戶手機之液晶顯示幕即使 .在切換時也不會出現黑屏現象。 6 M377801 【實施方式】 下面參照附圖,對本創作進行詳細描述。在整個描述 中,相同之附圖標記表示相同之部件。In view of the prior art, the museum provides an aspect of the four-electrical type, providing a power, power module, first communication module, and second communication mode for the dual-mode mobile phone. - a first t?, and and a logic control circuit. Wherein, the first communication module has an end. The cutting end is: the wheel out end; the second communication module has the electrical property between the second potential output group and a logic control circuit is connected to the group = the button is connected to the first potential output. The end and the second potential output end; "contacting the two end 'electrically connected power supply module; and - the output end, electrically switching the backlight of the I flute single 70, wherein when the dual mode mobile phone from the "communication module" In the case of the second communication module, the second input end of the logic control circuit supplies power to the moonlight 7G early, and keeps the display screen continuously lit. Imc preferably that the communication mode supported by the dual mode handset is a combination of any two of the GSM communication network, the communication network, and the CDMA communication network. For 2-way, the communication mode supported by the dual-mode mobile phone can also be a combination of any two of a 4CDMA communication network, a WCDMA communication network, and a cDMA 2〇〇〇 communication network. Preferably, if the output signal is high to illuminate the liquid crystal display screen, the second input signal of the logic control circuit is high in the switching mode. Preferably, the 'logic control circuit is a wafer' such as a wafer of TED 74 series or CMOS 4000 series wafers. Alternatively, the logic control circuit is an integrated circuit composed of discrete components. Preferably, when the output signal is a high potential to illuminate the liquid crystal display screen, the first input signal and the second input signal of the logic control circuit are in a low potential in the power saving mode of the standby state. The present invention also provides a mobile phone comprising at least a communication module of a first mobile network, a communication mode M377801 group different from a second mobile network of the first mobile network, a power supply system, and a display screen having a backlight unit. The power supply system includes a power module, a first communication module, a second communication module, a switching module and a logic control circuit. The first communication module has a first potential output. The second communication module has a second potential output. The switching module is configured to switch the electrical connection between the first communication module and the second communication module and the power module. The logic control circuit includes: a first input terminal, a second input terminal, and an output terminal. The first input end of the logic control circuit is electrically connected to the first potential wheel output end and the second potential output end. The second input end of the logic control circuit is electrically connected to the power module. One of the logic control circuit outputs • The terminal is electrically connected to the backlight unit of the display screen. Wherein 'when the dual mode handset is switched from the first communication module to the second communication module', power is supplied to the backlight unit through the second input of the logic control circuit, and remains unlit for continuous illumination. Preferably, the mobile phone is a dual mode mobile phone. For example, the mobile phone is any one of a GSM/PHS mobile phone, a GSM/CDMA mobile phone, and a CDma/PHS mobile phone. For 3G networks, the handset is either a td-SCDMA/WCDMA handset, a WCDMA/CDMA2000 handset, or a CDMA 2000/TD_SCDMA handset. In addition, the phone can also be a multi-mode phone. Preferably, when the handset is in the switching mode, the output signal of the logic control circuit supplies power to the backlight unit to illuminate the liquid crystal display. Preferably, when the mobile phone is in the power saving mode of the standby state, the output signal of the logic control circuit stops supplying power to the backlight unit, thereby causing the liquid crystal display to be extinguished. * With the power supply system of this new type, the liquid crystal display screen of the user's mobile phone does not appear black screen even when switching. 6 M377801 [Embodiment] The present invention will be described in detail below with reference to the drawings. Throughout the description, the same reference numerals indicate the same parts.
如前所述,雙模手機依據現有移動通信網路中之分 類,大致可分為GSM/PHS雙模手機,GSM/CDMA雙模手 機,以及PHS/CDMA雙模手機。本領域之普通技術人員應 .當理解,隨著移動通信技術之高速發展,移動通信運營商 之數量會越來越多,而且移動網路之功能也會越來越強 大。這樣一來,雙模手機可相容之通信模式也會越來越多。 • 例如,當前支持3G之TD-SCDMA、WCDMA和CDMA 2000 等等。相應地,雙模手機也可以是 TD-SCDMA/WCDMA 組合,或者 WCDMA/CDMA 2000 組 合,或TD-SCDMA/CDMA 2000組合。本領域之普通技術 人員應當理解,本申請之術語「雙模」不僅僅表示相容有 兩種不同通信網路之手機,也可以包含具有兩種以上之不 同通信網路之多模手機。本領域之普通技術人員應當理 •解,雙模手機和/或多模手機也包含在本申請之技術方案所 鲁主張之範圍内。 第1圖繪示雙模手機之切換示意圖。如第1圖所示, 雙模手機1〇〇包括兩種不同移動網路之通信模式,即,GSM 模式102和CDMA模式104。本領域之普通技術人員應當 理解,GSM模式102和CDMA模式1〇4只是雙模手機之 一個實施例’但是本申請之目的不只是局限於此。例如,As mentioned earlier, dual-mode phones can be broadly classified into GSM/PHS dual-mode phones, GSM/CDMA dual-mode phones, and PHS/CDMA dual-mode phones, depending on the classification of existing mobile communication networks. It should be understood by those skilled in the art that with the rapid development of mobile communication technologies, the number of mobile communication operators will increase, and the functions of mobile networks will become stronger and stronger. As a result, dual-mode phones will have more compatible communication modes. • For example, TD-SCDMA, WCDMA, and CDMA 2000, which currently support 3G, and so on. Accordingly, the dual mode handset can also be a TD-SCDMA/WCDMA combination, or a WCDMA/CDMA 2000 combination, or a TD-SCDMA/CDMA 2000 combination. It should be understood by those skilled in the art that the term "dual mode" in this application means not only a mobile phone compatible with two different communication networks, but also a multi-mode mobile phone having two or more different communication networks. Those of ordinary skill in the art will appreciate that dual mode handsets and/or multimode handsets are also included within the scope of the claimed invention. Figure 1 is a schematic diagram showing the switching of a dual-mode mobile phone. As shown in FIG. 1, the dual mode handset 1 includes two different mobile network communication modes, namely, GSM mode 102 and CDMA mode 104. One of ordinary skill in the art will appreciate that GSM mode 102 and CDMA mode 1〇4 are just one embodiment of a dual mode handset' but the purpose of this application is not limited thereto. E.g,
.該雙模手機可以是兩種或兩種以上其他移動網路之通信模 式間之組合。參照第1圖’根據不同通信環境或其他設置 參數,雙模手機可以從GSM模式1〇2切換到CDMA 7 M377801 模式104,或也可以從CDMA模式ι〇4切換到GSM模式 102。 第2圖是本創作用於雙模手機之供電系統之原理示惫 圖。參照第2圖,雙模手機200至少包括切換模組2〇2二 第一通信模組204,第二通信模組2〇6,邏輯控制電路2〇8, 背光單元210,顯示幕212以及電源模組214。例如,第〜 通信模組可以是GSM通信模組,第二通信模組可以是 CDMA通信模組,但本創作不只局限於此。其中,當切蠄 模組202電性連接GSM通信模組時,雙模手機相當於 通k模式:之單模手機,由GSm通信模組輸出控制信幾 (例如,间電位)至邏輯控制電路2〇8,並且該邏輯控 電路之輸出信號向背光單元21G供電,從而顯示幕212點 亮;類似地,當切換模組2〇2電性連接CDMA通信模組時, 雙模手機相當於CDMA通信模式下之單模手機,由cdm^ U組輸出控制信號(例如,高電位)至邏輯控制電路 208 ’並且該邏輯控制電路之輸出信號向背光單元210供 電一從《^顯7F幕212點亮’上述過程如第2圖之虛線部分 ,不。然而’當從GSM模式切換到cdma模式,或者從 DMA模^切換到GSM模式時,雙模手機首先要對系統 ==始化過程,此時,液晶顯示幕在復位過程中 /一宜現黑屏。如果切換時間過長,那麼用戶手機 幕可能長黑屏—段時間’致使用戶之體驗感強 烈下降。 她ϋΐί地解決切換過程中液晶顯示幕之黑屏問題, = —種熱切換電路’以保證在從-種通信模式 切換到另-種通信模式時,雙模手機之液晶顯示幕能夠顯 8 M377801 . 示文字或資料資訊。 第3圖是本創作用於雙模手機之供電系統在各種不同 狀態下之原理示意圖。參照第3圖,用於雙模手機3〇〇 ^ 供電系統至少包括切換模組302,第一通信模組3〇4,第-通信模組306,邊輯控制電路308,背光單元310,顯示^ 312,以及電源模組314。這襄,切換模組3〇2對應於第2 •圖之切換模組202 ;第一通信模組304對應於第.2圖之第 一通信模組204 ;第二通信模組306對應於第2圖之第二 通信模組206;背光單元310對應於第2圖之背光單元 21〇 ;以及顯示幕312對應於第2圖之顯示幕212 〇顯然, 第3圖與第2圖之不同之處在於,邏輯控制電路還包 括有第二輸入信號,即,來自電源模組314之信號。其中, 切換模組302最好包含一切換開關,用於將雙模手機從一 種通信模組切換到另一種通信模組。 通常地,在第一通信模組或第二通信模組工作時,顯 不幕312由背光單元310供以光源,並且通過邏輯控制電 路308之第一輸入信號來控制背光單元。換言之,當第一 輸^信號為高電位時,第一通信模組或第二通信模組向背 光單7L供電,顯不幕點亮;當第一輸入信號為低電位時, 背光單70處於斷電狀態,顯示幕熄滅。再次參照第2圖, 當雙模手機200處於GSM通信模式或CDMA通信模式 時,邏輯控制電路之第-輸入信號為高電位,液晶顯示幕 點免,當雙模手機200處於待機狀態下之節電模式時,邏 .輯控制電路之第-輸入信號為低電位,液晶顯示幕媳滅。 而要♦日出《雙模手機從GSM模式切換到⑶嫩模式(或 者從CDMA模式切換到㈣模式)時,祕重設時會導 M377801 致第一輸入信號變為低電位,液晶顯示幕因掉電而熄滅。 然而,如第3圖所示,當雙模手機3〇〇從一種通信模式切 換到另一種通信模式時,儘管系統也會進行重設和初始化 過程,但來自電源模組314之邏輯控制電路之第二輸入信 號用於控制背光單元,從而使顯示幕312持續點亮。 為了更深入地瞭解第3圖之邏輯控制電路,第4圖是 第3圖之雙模手機中邏輯控制電路之原理示意圖。作為示 例,我們不妨假定邏輯控制電路之第一輸入信號為The dual mode handset can be a combination of communication modes of two or more other mobile networks. Referring to Fig. 1 ', the dual mode handset can switch from GSM mode 1 to 2 to CDMA 7 M377801 mode 104, or can also switch from CDMA mode ι 4 to GSM mode 102, depending on the communication environment or other setting parameters. Figure 2 is a schematic diagram of the power supply system for this dual-mode mobile phone. Referring to FIG. 2, the dual mode mobile phone 200 includes at least a switching module 2〇2, a first communication module 204, a second communication module 2〇6, a logic control circuit 2〇8, a backlight unit 210, a display screen 212, and a power supply. Module 214. For example, the first communication module may be a GSM communication module, and the second communication module may be a CDMA communication module, but the present creation is not limited thereto. Wherein, when the switching module 202 is electrically connected to the GSM communication module, the dual-mode mobile phone is equivalent to the k-mode: the single-mode mobile phone, and the GSm communication module outputs the control signal (for example, the potential) to the logic control circuit. 2〇8, and the output signal of the logic control circuit supplies power to the backlight unit 21G, so that the display screen 212 is lit; similarly, when the switching module 2〇2 is electrically connected to the CDMA communication module, the dual-mode mobile phone is equivalent to CDMA. In the single mode mobile phone in the communication mode, the cdm^ U group outputs a control signal (for example, a high potential) to the logic control circuit 208' and the output signal of the logic control circuit supplies power to the backlight unit 210. Bright 'The above process is as shown in the dotted line of Figure 2, no. However, when switching from GSM mode to cdma mode, or from DMA mode to GSM mode, the dual-mode mobile phone must first start the system==initialization process. At this time, the liquid crystal display screen is in the reset process. . If the switching time is too long, the user's mobile phone screen may be black-screened for a period of time, resulting in a strong user experience. She ϋΐ 地 解决 解决 解决 解决 解决 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶Display text or information. Figure 3 is a schematic diagram of the principle of the power supply system for dual-mode mobile phones in various states. Referring to FIG. 3, the dual-mode mobile phone 3〇〇 power supply system includes at least a switching module 302, a first communication module 3〇4, a first communication module 306, a side control circuit 308, and a backlight unit 310. ^ 312, and power module 314. In this case, the switching module 3〇2 corresponds to the switching module 202 of FIG. 2; the first communication module 304 corresponds to the first communication module 204 of FIG. 2; the second communication module 306 corresponds to the 2, the second communication module 206; the backlight unit 310 corresponds to the backlight unit 21A of FIG. 2; and the display screen 312 corresponds to the display screen 212 of FIG. 2, obviously, the third picture is different from the second picture The logic control circuit further includes a second input signal, that is, a signal from the power module 314. The switching module 302 preferably includes a switch for switching the dual mode handset from one communication module to another. Generally, when the first communication module or the second communication module is in operation, the backlight unit 312 is supplied with a light source by the backlight unit 310, and the backlight unit is controlled by the first input signal of the logic control circuit 308. In other words, when the first input signal is high, the first communication module or the second communication module supplies power to the backlight unit 7L, and is not lit; when the first input signal is low, the backlight unit 70 is at In the power off state, the display screen is extinguished. Referring again to FIG. 2, when the dual mode mobile phone 200 is in the GSM communication mode or the CDMA communication mode, the first input signal of the logic control circuit is high, the liquid crystal display screen is free, and the dual mode mobile phone 200 is in a standby state. In the mode, the first input signal of the logic control circuit is low, and the liquid crystal display is extinguished. However, when the dual-mode mobile phone switches from GSM mode to (3) tender mode (or switches from CDMA mode to (four) mode), the secret setting will lead the M377801 to cause the first input signal to become low, and the LCD display screen Turn off the power and turn it off. However, as shown in FIG. 3, when the dual mode handset 3 switches from one communication mode to another, although the system performs a reset and initialization process, the logic control circuit from the power module 314 The second input signal is used to control the backlight unit such that the display screen 312 is continuously illuminated. In order to gain a deeper understanding of the logic control circuit of Fig. 3, Fig. 4 is a schematic diagram of the principle of the logic control circuit in the dual mode mobile phone of Fig. 3. As an example, let us assume that the first input signal of the logic control circuit is
PWMPWM
俏號,第二輸入信號為V—BL信號,並且邏輯控制電路之 輸出彳§號為LCM—EN信號,參照第4圖,該邏輯控制電路 是一個「或」閘(ORGate),本領域之普通技術人員應當理 解,第4圖之「或」閘只是本申請之一個示例實施例,所 有可以實現「或」閘之晶片或者分立元件均可以用作此邏 輯控制電路。以圖中所示電路為例,該控制電路包括pWM 仏號1 ’ V_BL信號2 ’接地電壓3 ’電源電壓5,以及LCM ΕΝ L號4 ^其中’ V_BL疋諸如通過CPU進行控制之啟動传 號,LCM_EN是控制背光單元從而使液晶顯示幕點亮或者 熄滅之使能信號。則有邏輯運算式: LCM一EN = PWM or V_BL 更為詳細地,其邏輯關係可描述為: 當PWM為高電位,V一BL為高電位時,LCM_EN為高 電位; 當PWM為高電位’ V—BL為低電位時,lCM_EN為高 • 電位; 當PWM為低電位,V_BL為高電位時,χχΜ一EN為高 M377801 電位; 當PWM為低電位,vjbl為低電位時,LCM—EN為低 電位。 本領域之普通技術人員應當理解,可以指定LCM_EN 為高電位時點亮液晶顯示幕,也可以指定LCM_EN為低電 位時點亮液晶顯示幕。所不同的是,當LCM_EN為低電位 點亮液晶顯示幕時,可以在「或」閘之輸出信號之後再加 上一個反相器即可,這時上述邏輯運算式可以變更為: LCM_EN = n〇t (PWM or V_BL) 在理解上述邏輯關係之基礎上,我們繼續分析根據本 創作之雙模手機在正常工作模式、節電稹式以及切換模式 之邏輯狀態。其中,以LCM—EN高電位時點亮液晶顯示幕 為例: (1) 正常工作模式 當雙模手機處於GSM通信模式或者CDMA通信模式 時,只要PWM信號為高電位,則使能信號LCM_EN為高 電位’ LCD之背光單元處於通電狀態,液晶顯示幕點亮。 此時,啟動彳§號V_BL之位元狀態對於LCM_EN沒有任何 影響,為了節能’我們不妨在此模式下將V:BL置為低電 位。 (2) 節電模式 .無淪雙模手機處於GSM通信模式,還是CDMA通信 模式,當手機在待機狀態下處於節電模式時(第3圖中未 不出)’根據剛述之邏輯關係,可以通過控制V—BL為低電 位並且PWM為低電位來實現。此時,經由「或」閘,lcm en 1VU//801 - 為低電位,LCD之背光單元處於斷電狀態,液晶顯示幕熄 減。 (3)切換模式 由於雙模手機從一種通信模式切換到另外一種通信模 式時’系統需要進行重設和初始化操作,若一直保持V_BL 信號為高電位,則PWM信號之狀態對於LCM_EN沒有任 '何影響’並且LCM_EN持續為高電位。在該切換過程中, • LCD之背光單元仍然處於通電狀態,液晶顯示幕持續點亮 鲁而不會熄滅。 從上述三種模式可以看出,現有技術中之雙模手機與 依據本創作之雙模手機相比較:在正常工作模式和節電模 式下’邏輯控制電路所實現之功能可以相同,並且液晶顯 不幕之狀態相同(均處於點亮狀態)。例如,LCM_EN信綠 ^電平狀態與PWM信號之電平狀態相同,當LCM一EN為 鬲電位時液晶顯示幕點亮,當LCM_EN為低電位時液晶颟 不幕熄滅。但是’在切換模式下,現有技術之雙模手機匈 LCM—EN為低電位而使液晶顯示幕處於黑屏狀態;相比< 下’本創作之雙模手機因為V_BL信號持續保持高電位而 使液晶顯示幕處於點亮狀態。換言之,我們可以理解為, 當雙模手機處於切換模式時,由啟動信號VjBL接管液晶 顯示幕之電源控制。 本領域之普通技術人員應當理解,邏輯控制電路308 可以是晶片,如TTL之74系列或CMOS之4000系列。束 *領域之普通技術人員應當理解,邏輯控制電路308也可以 *是由若干分立元件組成之積體電路’如通過電阻、電容和 電晶體間之任意組合來實現之控制電路。 12 M377801 在下文中,表1說明第4圖中控制電路之輸入輸出信 號在各種不同工作模式下之狀態列表。其中,高電位使用 「H」來表示,低電位使用「L」來表示。當雙模手機處於 正常顯示狀態時,PWM信號為H,V_BL信號為L,LCM_EN 為Η ;當雙模手機處於正常待機狀態時,PWM信號為L, V_BL信號為L,LCM_EN為L ;以及當雙模手機處於切換 狀態時,PWM信號為L,VJBL信號為Η,LCM_EN為Η。The second input signal is a V-BL signal, and the output of the logic control circuit is the LCM-EN signal. Referring to FIG. 4, the logic control circuit is an OR gate, which is in the art. One of ordinary skill in the art will appreciate that the OR gate of Figure 4 is only one exemplary embodiment of the present application, and that all wafers or discrete components that can implement an OR gate can be used as the logic control circuit. Taking the circuit shown in the figure as an example, the control circuit includes pWM 仏 1 ' V_BL signal 2 'ground voltage 3 ' power supply voltage 5, and LCM ΕΝ L number 4 ^ where ' V_BL 疋 such as the start-up mark controlled by the CPU LCM_EN is an enable signal for controlling the backlight unit to turn the liquid crystal display on or off. There is a logical expression: LCM-EN = PWM or V_BL In more detail, the logic can be described as: When PWM is high, V-BL is high, LCM_EN is high; when PWM is high' When V-BL is low, lCM_EN is high • potential; when PWM is low and V_BL is high, ENEN is high M377801 potential; when PWM is low and vjbl is low, LCM-EN is Low potential. It will be understood by those skilled in the art that the liquid crystal display may be illuminated when LCM_EN is at a high potential, or may be illuminated when LCM_EN is at a low potential. The difference is that when LCM_EN is low-level to illuminate the LCD screen, an inverter can be added after the output signal of the OR gate. At this time, the above logic expression can be changed to: LCM_EN = n〇 t (PWM or V_BL) Based on the understanding of the above logical relationship, we continue to analyze the logic state of the dual-mode mobile phone in the normal working mode, power saving mode and switching mode according to the present invention. Among them, the LCM-EN high-potential liquid crystal display screen is taken as an example: (1) Normal working mode When the dual-mode mobile phone is in GSM communication mode or CDMA communication mode, as long as the PWM signal is high, the enable signal LCM_EN is The high-potential 'LCD backlight unit is powered and the LCD screen lights up. At this time, the bit state of the start 彳§ V_BL has no effect on LCM_EN. In order to save energy, we may wish to set V:BL to a low level in this mode. (2) Power-saving mode. The dual-mode mobile phone is in GSM communication mode or CDMA communication mode. When the mobile phone is in the power-saving mode in standby mode (not shown in Figure 3), it can be passed according to the logical relationship just described. Control V-BL is low and PWM is low. At this time, through the "or" gate, lcm en 1VU//801 - is low, the backlight unit of the LCD is in the power-off state, and the liquid crystal display screen is turned off. (3) Switching mode Since the dual-mode mobile phone switches from one communication mode to another communication mode, the system needs to be reset and initialized. If the V_BL signal is kept high, the state of the PWM signal is not available for LCM_EN. Influence 'and LCM_EN continues to be high. During this switching process, • The backlight unit of the LCD is still powered, and the LCD screen continues to illuminate without being extinguished. It can be seen from the above three modes that the dual-mode mobile phone in the prior art is compared with the dual-mode mobile phone according to the present invention: in the normal working mode and the power-saving mode, the functions implemented by the logic control circuit can be the same, and the liquid crystal is not displayed. The status is the same (both in the light state). For example, the LCM_EN signal green level state is the same as the level state of the PWM signal. When the LCM-EN is 鬲 potential, the liquid crystal display illuminates, and when LCM_EN is low, the liquid crystal dies are extinguished. However, in the switching mode, the prior art dual-mode mobile phone HCM-EN is low-potential and the liquid crystal display screen is in a black screen state; compared to the lower double-mode mobile phone of the present invention, the V_BL signal continues to maintain a high potential. The LCD screen is lit. In other words, we can understand that when the dual-mode mobile phone is in the switching mode, the power supply control of the liquid crystal display screen is taken over by the start signal VjBL. One of ordinary skill in the art will appreciate that the logic control circuit 308 can be a wafer, such as a 74 series of TTL or a 4000 series of CMOS. It will be understood by those skilled in the art that the logic control circuit 308 can also be an integrated circuit composed of a number of discrete components, such as a control circuit implemented by any combination of resistors, capacitors, and transistors. 12 M377801 In the following, Table 1 shows the status list of the input and output signals of the control circuit in Figure 4 in various operating modes. Among them, the high potential is indicated by "H" and the low potential is represented by "L". When the dual-mode mobile phone is in the normal display state, the PWM signal is H, the V_BL signal is L, and the LCM_EN is Η; when the dual-mode mobile phone is in the normal standby state, the PWM signal is L, the V_BL signal is L, LCM_EN is L; When the dual-mode mobile phone is in the switching state, the PWM signal is L, the VJBL signal is Η, and LCM_EN is Η.
PWM V_BL LCM_EN 正常顯示狀態 Η L Η 正常待機狀態 L L L 切換狀態 L Η Η 雖然本新型已以實施方式揭露如上,然其並非用以限 定本新型,任何熟習此技藝者,在不脫離本新型之精神和 範圍内,當可作各種之更動與潤飾,因此本新型之保護範 • 圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 第1圖繪示雙模手機之切換示意圖; 第2圖是本創作用於雙模手機之供電系統之原理示意 圖, 第3圖示意性地說明用於雙模手機之供電系統在各種 不同狀態下之原理示意圖;以及 ' 第4圖繪示第3圖中雙模手機之邏輯控制電路之原理 13 M377801 示意圖。 【主要元件符號說明】 雙模手機100 GSM通信模組102 CDMA通信模組104 雙模手機200 切換模組202 第一通信模組204 第二通信模組206 邏輯控制電路208 背光單元210 顯示幕212 電源模組214 雙模手機300 切換模組302 第一通信模組304 第二通信模組306 邏輯控制電路308 背光單元310 顯示幕312 電源模組314 14PWM V_BL LCM_EN Normal display state Η L 正常 Normal standby state LLL switching state L Η Η Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and anyone skilled in the art can avoid the spirit of the present invention. And within the scope, the various modifications and refinements may be made, and therefore the protection scope of the present invention is defined by the scope of the patent application. [Simple diagram of the diagram] Figure 1 shows the schematic diagram of the switching of the dual-mode mobile phone; Figure 2 is a schematic diagram of the principle of the power supply system for the dual-mode mobile phone, and Figure 3 is a schematic diagram for the dual-mode mobile phone. Schematic diagram of the principle of the power supply system in various states; and 'Figure 4 shows the schematic diagram of the logic control circuit of the dual-mode mobile phone in Figure 3, M377801. [Main component symbol description] Dual mode mobile phone 100 GSM communication module 102 CDMA communication module 104 Dual mode mobile phone 200 switching module 202 First communication module 204 Second communication module 206 Logic control circuit 208 Backlight unit 210 Display screen 212 Power module 214 dual-mode mobile phone 300 switching module 302 first communication module 304 second communication module 306 logic control circuit 308 backlight unit 310 display screen 312 power module 314 14
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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TWI481238B (en) * | 2011-10-19 | 2015-04-11 | Htc Corp | System and method for supporting multiple phone systems |
TWI491215B (en) * | 2011-06-21 | 2015-07-01 | Chiun Mai Comm Systems Inc | System and method for enhancing mutual interference sensitivity of dual mode mobile |
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TWI491215B (en) * | 2011-06-21 | 2015-07-01 | Chiun Mai Comm Systems Inc | System and method for enhancing mutual interference sensitivity of dual mode mobile |
TWI481238B (en) * | 2011-10-19 | 2015-04-11 | Htc Corp | System and method for supporting multiple phone systems |
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