JP2004312460A - Portable telephone unit - Google Patents

Portable telephone unit Download PDF

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Publication number
JP2004312460A
JP2004312460A JP2003104429A JP2003104429A JP2004312460A JP 2004312460 A JP2004312460 A JP 2004312460A JP 2003104429 A JP2003104429 A JP 2003104429A JP 2003104429 A JP2003104429 A JP 2003104429A JP 2004312460 A JP2004312460 A JP 2004312460A
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JP
Japan
Prior art keywords
liquid crystal
display region
crystal screen
display
standby
Prior art date
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
Application number
JP2003104429A
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Japanese (ja)
Inventor
Akihiro Abe
昭広 阿部
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2003104429A priority Critical patent/JP2004312460A/en
Publication of JP2004312460A publication Critical patent/JP2004312460A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Abstract

<P>PROBLEM TO BE SOLVED: To reduce power consumption without spoiling easiness to see a liquid crystal screen in a portable telephone provided with the liquid crystal screen. <P>SOLUTION: A display region surrounded by lines Y<SB>1</SB>-Y<SB>N</SB>and X<SB>1</SB>-X<SB>M</SB>out of an entire display region of the liquid crystal screen is constituted of a liquid crystal having lower light transmittance or a higher light reflection factor than those of the other display region. Information required at waiting, such as "call terminated" indicating that a call has been terminated in the past, a clock indicating a present time, the residual capacity of a battery, and an antenna mark showing whether an electric wave condition is good or not are displayed in the display region surrounded by lines Y<SB>1</SB>-Y<SB>N</SB>and X<SB>1</SB>-X<SB>M</SB>. That is, the region having lower light transmittance or a higher reflection factor than those of the other display region is set as a display region for waiting. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、液晶画面を備えた携帯電話装置に関する。
【0002】
【従来の技術】
従来、携帯電話の液晶画面については、液晶パネル全面に同じ透過率の液晶が搭載されている場合が多い(例えば、特許文献1参照)。
【0003】
【特許文献1】
特開2003−84276号公報
【0004】
【発明が解決しようとする課題】
しかしながら、光の透過率が小さい液晶が液晶パネル全面に搭載されている場合、バックライトを点灯してもその光があまり透過しないので、明るく鮮明な表示にできず、色の再現性が良くないため、画面の見栄えが良くない。一方、光の透過率が大きい液晶が液晶パネル全面に搭載されている場合、バックライトがないと画面がほとんど見えないので、常にバックライトを点灯しておく必要があり、消費電力が大きくなってしまう。
【0005】
本発明は、かかる点に鑑みてなされたものであり、液晶画面の見やすさを損なうことなく消費電力を削減することができる液晶画面を備えた携帯電話装置を提供することを目的とする。
【0006】
【課題を解決するための手段】
本発明の携帯電話装置の液晶画面は、部分的に光の透過率または反射率が異なる複数の領域を備える構成を採る。この構成によれば、部分的に液晶へ入射する光の透過率または反射率を変えて、液晶表示の見え方を変えることができる。例えば、待ち受け時表示領域や着信メッセージ表示領域の透過率を他の領域の透過率に比べて小さくする、または、待ち受け時表示領域や着信メッセージ表示領域の反射率を他の領域の反射率に比べて大きくすることにより、待ち受け時にバックライトを点灯しなくても待ち受け時表示領域や着信メッセージ表示領域に表示される情報を読みとることができる。よって、待ち受け時の消費電力を削減することができる。
【0007】
【発明の実施の形態】
以下、本発明の実施の形態について、図面を参照して説明する。図1は、本発明の一実施の形態に係る携帯電話の構成を示すブロック図である。図1に示す携帯電話は、アンテナ1と、無線通信部2と、キー操作部3と、制御部4と、液晶表示装置5とから構成される。また、液晶表示装置5は、液晶画面6と、液晶画面6全体を照射するバックライト7とから構成される。
【0008】
アンテナ1で無線受信された信号は無線通信部2でダウンコンバートや、A/D変換等の所定の無線処理を施された後、制御部4に入力される。制御部4は、着信時には、発信者の電話番号や、その電話番号と関連付けて登録されている発信者名等の着信メッセージを液晶表示装置5の液晶画面6に表示する。また、制御部4は、待ち受け時には、過去に着信があったことを示す「着信あり」や、現在時刻を示す時計や、電池残量や、電波状況の良否を示すアンテナマーク等、待ち受け時に必要な情報を液晶画面6に表示する。
【0009】
また、携帯電話使用者がキー操作部3を用いて電話番号等をキー入力すると、制御部4は、液晶表示装置5のバックライト7を点灯させて、液晶画面6の表示を見やすくする。また、制御部4は、待ち受け時には、バックライト7を消灯し、また、液晶画面6の一部の領域だけを表示させる。
【0010】
次いで、液晶画面6の構成について説明する。図2は液晶画面6の全表示領域を表示した状態の一例であり、図3は待ち受け時の液晶画面6の表示の一例である。
【0011】
まず、図2において、液晶画面6には縦方向と横方向に複数の電極が並んでおり、電極に電圧を加えることにより情報を液晶に表示することができる。ここで、本実施の形態では、全表示領域のうち、縦方向のY〜Yの電極と横方向のX〜Xの電極とで囲まれた表示領域を、他の表示領域に比べ光の透過率がより小さい液晶、あるいは、光の反射率がより大きい液晶で構成する。また、図2に示すように、Y〜YとX〜Xとで囲まれた表示領域には、過去に着信があったことを示す「着信あり」、現在時刻を示す時計、電池残量、電波状況の良否を示すアンテナマーク等、待ち受け時に必要な情報を表示する。また、待ち受け時に必要な情報に加えて、着信時に、発信者の電話番号や、その電話番号と関連付けて登録されている発信者名等の着信メッセージをこの領域に表示するようにしてもよい。つまり、他の表示領域に比べ光の透過率がより小さい領域、あるいは、他の表示領域に比べ光の反射率がより大きい領域を、待ち受け時表示領域または着信メッセージ表示領域として設定する。
【0012】
待ち受け時の画面表示は、図3に示すようになる。本実施の形態では、待ち受け時には、待ち受け時表示領域だけを表示させ、また、バックライト7を消灯する。しかし、Y〜YとX〜Xとで囲まれた表示領域(つまり、光の透過率がより小さい領域、あるいは、光の反射率がより大きい領域)が待ち受け時表示領域として設定されているため、バックライト7を消灯した場合でも、図3に示すように、待ち受け時表示領域を見やすく表示することができる。
【0013】
次いで、本実施の形態に係る携帯電話の動作について説明する。図4は、本発明の一実施の形態に係る携帯電話の動作フロー図である。なお、以下の説明では、着信時には液晶画面の全表示領域を表示させる場合を一例に挙げて説明するが、上記のように、着信時にも、待ち受け時同様、一部の表示領域だけを表示するようにしてもよい。
【0014】
まず、携帯電話のキー操作部3を用いて電源がオンされると(ステップS1)、制御部4が、液晶画面6の全表示領域を表示させると共に、バックライト7を点灯させ液晶画面6の全表示領域を照射する(ステップS2)。これにより「全画面表示状態」となる(ステップS3)。
【0015】
その後、キー入力や着信がない状態が一定時間続くと(ステップS4〜S5)、待ち受け状態となり(ステップS6)、制御部4は、液晶画面6のY〜YとX〜Xとで囲まれた透過率の小さい表示領域(待ち受け時表示領域)だけを表示させ、それ以外の透過率の大きい表示領域は表示させない。また、制御部4は、バックライト7を消灯させる(ステップS7)。これにより、上記図3に示すような、日付や現在時刻、電池残量や電波状況を示すマークなどのごく限られた情報のみを表示した「待ち受け表示状態」となる(ステップS8)。その後、再びキー入力や着信があると「全画面表示状態」となる(ステップS9、ステップS3)。
【0016】
このように、本実施の形態によれば、待ち受け時表示領域の透過率が小さい(または、待ち受け時表示領域の反射率が大きい)ので、室内などの明るい場所では照明の光が液晶表示面で反射するため、「待ち受け表示状態」(ステップS8)においてバックライト7を点灯しなくても、携帯電話使用者は液晶画面の表示を読みとることができる。また、待ち受け時にバックライト7で消費していた電力を削減することができ、待ち受け時間を延ばすことができる。
【0017】
また、「全画面表示状態」(ステップS3)においてのみ表示される領域(図2のY〜YとX〜Xとで囲まれた領域以外の表示領域)は、透過率が大きい、または、反射率が小さい領域であるため、バックライト7の光の明るさがあまり減少せずに画面に届き表示が明るくなるので、画面表示の見栄えを良くできる。このような画面表示の見栄えが良い領域には、主に文字や画像等を表示する。なお、携帯電話に例えばカラー液晶を搭載した場合で、光の透過率が非常に小さい「完全反射型」の液晶と光の透過率が非常に大きい「完全透過型」の液晶を組み合わせた場合は、バックライト7を点灯した時に、光の透過率の小さい部分が光の透過率の大きい部分に比べて暗くなり、輝度の差が目立ちやすいことがある。よってこの場合には、光の透過率の小さい部分の輝度を高めるために、光の透過率の小さい部分だけカラーフィルタをなくしてモノクロ表示にするようにしてもよい。あるいは、光の透過率の小さい部分は黒色表示などにすることにより、光の透過率の大きい部分の表示をより見栄え良く引き立たせるようにしてもよい。
【0018】
なお、本実施の形態では、図2や図3に示すように全表示領域を2つに分けた。しかし、これに限定されることなく、全表示領域を、2つ以上の複数の異なる透過率あるいは反射率の液晶で、2つ以上の複数の領域に分けて構成してもよい。
【0019】
【発明の効果】
以上説明したように、本発明によれば、液晶画面の見やすさを損なうことなく消費電力を削減することができる。
【図面の簡単な説明】
【図1】本発明の一実施の形態に係る携帯電話の構成を示すブロック図
【図2】本発明の一実施の形態に係る携帯電話の液晶画面の表示例(全画面表示状態)
【図3】本発明の一実施の形態に係る携帯電話の液晶画面の表示例(待ち受け表示状態)
【図4】本発明の一実施の形態に係る携帯電話の動作フロー図
【符号の説明】
1 アンテナ
2 無線通信部
3 キー操作部
4 制御部
5 液晶表示装置
6 液晶画面
7 バックライト
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile phone device having a liquid crystal screen.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a liquid crystal screen of a mobile phone, a liquid crystal having the same transmittance is often mounted on the entire surface of a liquid crystal panel (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP 2003-84276 A
[Problems to be solved by the invention]
However, when a liquid crystal having a low light transmittance is mounted on the entire surface of the liquid crystal panel, even if the backlight is turned on, the light does not transmit much, so that a bright and clear display cannot be obtained and color reproducibility is poor. Therefore, the appearance of the screen is not good. On the other hand, when a liquid crystal with high light transmittance is mounted on the entire surface of the liquid crystal panel, the screen can hardly be seen without the backlight, so it is necessary to keep the backlight on and the power consumption increases. I will.
[0005]
The present invention has been made in view of the above, and an object of the present invention is to provide a mobile phone device having a liquid crystal screen capable of reducing power consumption without impairing the visibility of the liquid crystal screen.
[0006]
[Means for Solving the Problems]
The liquid crystal screen of the mobile phone device according to the present invention employs a configuration including a plurality of regions having partially different light transmittances or reflectances. According to this configuration, it is possible to change the appearance of the liquid crystal display by partially changing the transmittance or the reflectance of the light incident on the liquid crystal. For example, the transmittance of the standby display area or the incoming message display area is made smaller than the transmittance of other areas, or the reflectance of the standby display area or the incoming message display area is compared with the reflectance of other areas. By increasing the size, information displayed in the standby display area or the incoming message display area can be read without turning on the backlight during standby. Therefore, power consumption during standby can be reduced.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a mobile phone according to one embodiment of the present invention. The mobile phone shown in FIG. 1 includes an antenna 1, a wireless communication unit 2, a key operation unit 3, a control unit 4, and a liquid crystal display device 5. The liquid crystal display device 5 includes a liquid crystal screen 6 and a backlight 7 that irradiates the entire liquid crystal screen 6.
[0008]
A signal wirelessly received by the antenna 1 is subjected to predetermined wireless processing such as down-conversion and A / D conversion by the wireless communication unit 2 and then input to the control unit 4. When an incoming call is received, the control unit 4 displays an incoming message such as a caller's telephone number and a caller name registered in association with the telephone number on the liquid crystal screen 6 of the liquid crystal display device 5. In addition, the control unit 4 is required to perform a standby operation such as “call received” indicating that there was an incoming call in the past, a clock indicating the current time, a remaining battery level, and an antenna mark indicating whether the radio wave condition is good or not. Important information is displayed on the liquid crystal screen 6.
[0009]
When the user of the mobile phone inputs a telephone number or the like using the key operation unit 3, the control unit 4 turns on the backlight 7 of the liquid crystal display device 5 to make the display on the liquid crystal screen 6 easier to see. The control unit 4 turns off the backlight 7 and displays only a partial area of the liquid crystal screen 6 during standby.
[0010]
Next, the configuration of the liquid crystal screen 6 will be described. FIG. 2 is an example of a state in which the entire display area of the liquid crystal screen 6 is displayed, and FIG. 3 is an example of a display of the liquid crystal screen 6 in a standby state.
[0011]
First, in FIG. 2, a plurality of electrodes are arranged in a vertical direction and a horizontal direction on the liquid crystal screen 6, and information can be displayed on the liquid crystal by applying a voltage to the electrodes. Here, in the present embodiment, of the entire display area, a display area surrounded by electrodes Y 1 to Y N in the vertical direction and electrodes X 1 to X M in the horizontal direction is assigned to another display area. It is composed of a liquid crystal having a smaller light transmittance or a liquid crystal having a larger light reflectance. As shown in FIG. 2, a display area surrounded by Y 1 to Y N and X 1 to X M indicates “incoming call” indicating that there was an incoming call in the past, a clock indicating the current time, Information necessary at the time of standby, such as the remaining battery level and an antenna mark indicating the quality of the radio wave condition, is displayed. Further, in addition to the information necessary for waiting, an incoming message such as a caller's telephone number and a caller name registered in association with the telephone number may be displayed in this area at the time of an incoming call. That is, an area having a lower light transmittance than the other display areas or an area having a higher light reflectance than the other display areas is set as the standby display area or the incoming message display area.
[0012]
The screen display during standby is as shown in FIG. In the present embodiment, at the time of standby, only the display area during standby is displayed, and the backlight 7 is turned off. However, a display area surrounded by Y 1 to Y N and X 1 to X M (that is, an area having a lower light transmittance or an area having a higher light reflectance) is set as the standby display area. Therefore, even when the backlight 7 is turned off, the standby display area can be displayed in an easily viewable manner as shown in FIG.
[0013]
Next, the operation of the mobile phone according to the present embodiment will be described. FIG. 4 is an operation flowchart of the mobile phone according to the embodiment of the present invention. In the following description, the case where the entire display area of the liquid crystal screen is displayed at the time of an incoming call will be described as an example. However, as described above, only a part of the display area is displayed at the time of an incoming call as well as at the time of standby. You may do so.
[0014]
First, when the power is turned on using the key operation unit 3 of the mobile phone (step S1), the control unit 4 displays the entire display area of the liquid crystal screen 6, turns on the backlight 7 and turns on the liquid crystal screen 6. The entire display area is irradiated (Step S2). As a result, a "full screen display state" is set (step S3).
[0015]
Thereafter, when the key input or incoming call state is not continued a predetermined time (step S4-S5), it becomes the standby state (step S6), and the control unit 4, and Y 1 to Y N and X 1 to X M of the liquid crystal display 6 Only the display area with small transmittance (standby display area) surrounded by is displayed, and other display areas with large transmittance are not displayed. Further, the control unit 4 turns off the backlight 7 (step S7). As a result, as shown in FIG. 3, a "standby display state" is displayed in which only limited information such as the date, the current time, the remaining battery level, and the signal indicating the radio wave condition are displayed (step S8). After that, when there is a key input or an incoming call again, the "full screen display state" is set (step S9, step S3).
[0016]
As described above, according to the present embodiment, the transmittance of the standby display area is small (or the reflectance of the standby display area is large). Because of the reflection, the user of the mobile phone can read the display on the liquid crystal screen without turning on the backlight 7 in the “standby display state” (step S8). Further, the power consumed by the backlight 7 during standby can be reduced, and the standby time can be extended.
[0017]
Further, an area displayed only in the “full screen display state” (step S3) (a display area other than an area surrounded by Y 1 to Y N and X 1 to X M in FIG. 2) has a large transmittance. Or, since it is an area where the reflectance is small, the brightness of the light of the backlight 7 reaches the screen without being reduced so much and the display becomes bright, so that the appearance of the screen display can be improved. Characters, images, and the like are mainly displayed in such a good-looking area of the screen display. For example, when a mobile phone is equipped with, for example, a color liquid crystal, and a combination of a “perfectly reflective” liquid crystal with a very small light transmittance and a “perfectly transmitted” liquid crystal with a very large light transmittance is used. When the backlight 7 is turned on, a portion having a small light transmittance becomes darker than a portion having a large light transmittance, and the difference in luminance may be conspicuous. Therefore, in this case, in order to increase the brightness of the portion where the light transmittance is small, the color filter may be omitted only in the portion where the light transmittance is small, and the monochrome display may be performed. Alternatively, a portion having a low light transmittance may be displayed in black or the like, so that a display of a portion having a high light transmittance may be enhanced in a more attractive manner.
[0018]
In the present embodiment, the entire display area is divided into two as shown in FIGS. However, without being limited to this, the entire display area may be divided into two or more plural areas by using two or more liquid crystals having different transmittances or reflectances.
[0019]
【The invention's effect】
As described above, according to the present invention, power consumption can be reduced without deteriorating the visibility of a liquid crystal screen.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a mobile phone according to an embodiment of the present invention. FIG. 2 is a display example of a liquid crystal screen of a mobile phone according to an embodiment of the present invention (full-screen display state).
FIG. 3 is a display example (standby display state) of a liquid crystal screen of the mobile phone according to one embodiment of the present invention.
FIG. 4 is an operation flowchart of the mobile phone according to the embodiment of the present invention.
REFERENCE SIGNS LIST 1 antenna 2 wireless communication unit 3 key operation unit 4 control unit 5 liquid crystal display device 6 liquid crystal screen 7 backlight

Claims (2)

光の透過率または反射率が互いに異なる複数の表示領域を有する液晶画面と、
前記液晶画面の全領域を照射し、待ち受け時に消灯するバックライトと、
を備えることを特徴とする携帯電話装置。
A liquid crystal screen having a plurality of display areas having different light transmittances or reflectances from each other,
A backlight that illuminates the entire area of the liquid crystal screen and is turned off during standby,
A mobile phone device comprising:
前記液晶画面において、光の透過率がより小さい領域または光の反射率がより大きい領域は、着信メッセージ表示領域または待ち受け時表示領域に設定される、
ことを特徴とする請求項1記載の携帯電話装置。
In the liquid crystal screen, a region where light transmittance is smaller or a region where light reflectance is larger is set as an incoming message display region or a standby display region.
The mobile phone device according to claim 1, wherein:
JP2003104429A 2003-04-08 2003-04-08 Portable telephone unit Pending JP2004312460A (en)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100643460B1 (en) 2005-12-12 2006-11-10 엘지전자 주식회사 Charge state display device and method for mobile communication device
JPWO2013145138A1 (en) * 2012-03-27 2015-08-03 富士通株式会社 Wireless communication terminal and wireless communication method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100643460B1 (en) 2005-12-12 2006-11-10 엘지전자 주식회사 Charge state display device and method for mobile communication device
JPWO2013145138A1 (en) * 2012-03-27 2015-08-03 富士通株式会社 Wireless communication terminal and wireless communication method
US9241312B2 (en) 2012-03-27 2016-01-19 Fujitsu Limited Radio communications terminal and radio communications method

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