CN1226780A - 调谐设备控制器和调谐设备的调谐器供电控制方法 - Google Patents

调谐设备控制器和调谐设备的调谐器供电控制方法 Download PDF

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CN1226780A
CN1226780A CN98118529.0A CN98118529A CN1226780A CN 1226780 A CN1226780 A CN 1226780A CN 98118529 A CN98118529 A CN 98118529A CN 1226780 A CN1226780 A CN 1226780A
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大柜敏郎
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Fujitsu Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44209—Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H04N21/4436—Power management, e.g. shutting down unused components of the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/63—Generation or supply of power specially adapted for television receivers

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Databases & Information Systems (AREA)
  • Software Systems (AREA)
  • Circuits Of Receivers In General (AREA)
  • Television Receiver Circuits (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

本发明所提出的技术根据调谐器(28)提供的指示信号接收状况的信号确定所执行的信号接收是否正常,而在信号接收不正常时中断对调谐器(28)供电。此外,还可以检测天线(10)是否已与调谐设备连接,而在天线(10)没有与调谐设备连接时中断对调谐器(28)供电,从而节约了无谓的功率消耗。

Description

调谐设备控制器和调谐设备 的调谐器供电控制方法
本发明涉及一种调谐设备的控制器，特别是涉及诸如液晶显示电视机、笔记本型个人计算机那样的具有调谐器的调谐设备的控制器。
本发明还涉及对这类调谐设备的调谐器的供电进行控制的方法。
近来，已经开发了诸如液晶显示电视机那样的由电池供电驱动的电视机和由电池供电驱动、在电视机的液晶显示器上显示电视图像的笔记本型个人计算机。这类设备由电池供电驱动，因此设备的驱动时间(指设备可由电池供电驱动进行工作的时间)是有限的。所以，需要降低这类设备中的功率消耗，延长设备的驱动时间。
在日本公开专利申请No.61-273074或日本公开专利申请No.5-236369中揭示了一种功率消耗有所降低的含电视调谐器的设备。
在日本公开专利申请No.61-273074中，揭示了一种带有电视机的磁图像录放设备，这种设备包括：一个接收电视广播的电视调谐部；一个录取电视信号和重放图像的VTR部，一个显示图像的电视监视部，一个通过主开关向各部供电的供电部，以及一个在重放模式中断向电视调谐部供电的副开关。在这种设备中有效地降低了功率消耗。
此外，在日本公开专利申请No.5-236394中揭示了一种电视机，这种电视机包括：一个从外部输入电视信号的外输入端，一个调谐电路，一个在通过外输入端输入的电视信号和从调谐电路输入的电视信号之间切换电视信号的输入切换电路，一个电视信号处理电路，一个显示图像信号的显像管，一个检测电视信号有无的电视信号有无检测电路，以及一个在检测到无电视信号时断开为显像管本体供电的供电电路的控制电路。这种设备防止了忘关电源而造成的浪费。
然而，在日本公开专利申请No.61-273074所揭示的带电视机的磁图像录放设备中，在VTR部的除重放以外的其他模式，即使是在天线没有与电视调谐部连接的情况下或在天线虽然与电视调谐部连接但只接收到微弱信号的情况下，都还向电视调谐部供电。结果，虽然已经不可能观看电视节目，但仍一直显示着无意义的画面，因此在电视调谐部浪费了功率。
在日本公开专利申请No.5-236394所揭示的电视机中，如上所述，在检测到无电视信号时向显像管本体供电的供电电路就被断开。然而，即使是在天线没有与调谐电路连接的情况下或在天线虽然与调谐电路连接但只接收到微弱信号的情况下，由于仍有微弱的电视信号分量输入，电视信号有无检测电路检测不出无电视信号状态。结果，向显像管本体供电的供电电路并没有被断开，从而浪费了功率。
本发明是考虑了上述问题作出的，目的是提供一种调谐设备和对这种调谐设备的调谐器的供电进行控制的方法，使得在天线没有与调谐电路连接的情况下或在天线虽然与调谐电路连接但只接收到微弱信号的情况下可以中断对电视调谐器的供电，从而消除了无谓的功率损耗，延长了设备的驱动时间。
本发明所提出的含有一个调谐器的调谐设备包括：
信号接收确定装置，所述装置根据调谐器提供的指示信号接收状况的信号确定所执行的信号接收是否正常；以及
供电中断装置，所述装置在信号接收确定装置确定所执行的信号接收不正常时中断对调谐器供电。
因此，这种调谐设备可以根据调谐器提供的指示信号接收状况的信号确定所执行的信号接收是否正常，并在信号接收不正常时中断对调谐器供电。结果，这种设备可以防止显示没有意义的图像，节约了无谓的功率消耗。
这种调谐设备还可以包括天线连接检测装置，用来检测天线是否已与调谐设备连接。这样，供电中断装置还可以在天线连接检测装置确定天线没有与调谐设备连接时中断对调谐器供电。
因此，这种调谐设备可以根据调谐器提供的指示信号接收状况的信号确定所执行的信号接收是否正常，并在信号接收不正常时中断对调谐器的供电，而且还可以检测天线是否已与调谐设备连接，并在天线没有与调谐设备连接时中断对调谐器的供电。结果，这种设备可以防止显示没有意义的图像，节约了无谓的功率消耗。
按照本发明的另一种实施方式，所提出的含有一个调谐器的调谐设备包括：
天线连接检测装置，用来检测天线是否已与调谐设备连接；以及
供电中断装置，所述装置在天线连接检测装置确定天线没有与调谐设备连接时中断对调谐器的供电。
因此，这种调谐设备可以检测天线是否已与调谐设备连接，并在天线没有与调谐设备连接时中断对调谐器供电。结果，这种设备可以防止显示没有意义的图像，节约了无谓的功率消耗。
这种调谐设备可以是由电池供电的。
因此，这种调谐设备可以根据调谐器提供的指示信号接收状况的信号确定所执行的信号接收是否正常，并在信号接收不正常时中断对调谐器供电，而且还可以检测天线是否已与调谐设备连接，并在天线没有与调谐设备连接时中断对调谐器供电。结果，这种设备可以防止显示没有意义的图像，节约无谓的功率消耗，从而能延长电池的使用时间。
调谐设备可以是一个笔记本型个人计算机。
在这种笔记本型个人计算机中，可以防止无谓的功率消耗，从而能延长电池的使用时间。
调谐器提供的指示信号接收状况的信号可以是呈现S型特性的自动细调信号。
这样，就可以有效地确定执行的信号接收是否正常。
天线连接检测装置可以通过检测天线的插头是否已插入调谐设备的插座来检测天线是否已与调谐设备连接。
本发明的其他目的和特点通过以下结合附图所作的详细说明就会更加清楚，在这些附图中：
图1示出了本发明实施例中的笔记本型个人计算机的方框图；
图2为示出天线与笔记本型个人计算机之间连接情况的外部透视图；
图3为S型特性的波型图；
图4示出了图1中的调谐器的方框图；以及
图5示出了图1中的电视控制器所执行的控制处理的流程图。
图1所示为本发明所提出的调谐设备实施例中的笔记本型个人计算机的方框图。图2所示为示出天线10与笔记本型个人计算机20之间连接情况的外部透视图。这种笔记本型个人计算机20由电池供电驱动。在图2中，电视机天线10的天线电缆12上的插头14可以插入和拔离笔记本型个人计算机20上的插座22。天线10在插头14插入了插座22的情况下使用。
如图1所示，插座22的引线端24在插头14已从插座22拔出的情况下是与插座22的接地端分离的。引线端24与电视控制器26连接，并通过电阻R1接到电源电压Vcc上。在插头14已拔离插座22的情况下，就有一个高电平的天线连接检测信号送至电视控制器26。
在插头14已插入插座22的情况下，引线端24通过插头14与接地端23连接，因此送至电视控制器26的天线连接检测信号为低电平。在这种情况下，通过天线10接收的信号送至调谐器28。
电源电压Vcc通过供电开关30加到调谐器28上。调谐器28对所接收的信号进行解调所得的图像信号和伴音信号送至A/D变换器32。调谐器28还向电视控制器26提供一个呈S型特性的AFT(自动细调)信号。
下面将说明S型特性的情况。调谐器28的本振频率设置在由PLL电路确定的频率。然而，由于接收状况和广播台的状况不同，发射信号的频率会有所偏移。因此，为了正常接收这样的发射信号，必需按照发射信号的频率改变本振频率。AFT就是一个用来控制本振频率的环。AFT在通过天线10接收的信号的频率与本振频率一致时输出电压为Vcc/2的AFT信号，在本振频率高于通过天线10接收的信号的频率时输出电压低于Vcc/2的AFT信号，而在本振频率低于通过天线10接收的信号的频率时输出电压高于Vcc/2的AFT信号。因此，在进行调谐时，AFT信号就呈现为如图3所示的S型特性。
根据来自CPU(中央处理单元)40的指令，电视控制器26将一个频率设置信号送至调谐器28，选择频道。此外，根据插座22的引线端24提供的天线连接检测信号和调谐器28提供的AFT信号，电视控制器26控制供电开关30的打开/闭合。
CPU40接到总线42上。此外，R0M44、RAM46、输入装置48(如键盘、指点器之类)、调制解调器50、硬盘装置(HDD)52、软盘装置(FDD)54、图像信号处理电路56、伴音信号处理电路58等也都接到总线42上。这些接到总线42上的电路和装置的工作都由CPU40执行的程序控制。
图像信号经A/D变换器32变换成数字信号后送至图像信号处理电路56，图像显示在液晶显示器60上。伴音信号经A/D变换器32变换成数字信号后送至伴音信号处理电路58，由扬声器62产生伴音。
图4示出了本发明实施例中的调谐器28的方框图。图中，在天线10的插头14插入个人计算机20的插座22的情况下，通过天线10接收的信号就送至输入端70。频率分离电路72将接收信号分离为VHF频带的信号和UHF频带的信号。VHF频带的信号送至VHF块74的调谐电路77，而UHF频带的信号送至UHF块76的调谐电路87。
在选择VHF时，VHF块74的调谐电路74按照调谐电压产生电路102提供的调谐电压进行调谐，选择相应频带属VHF频带的信号。这样得到的信号送至放大电路78放大后通过调谐电路79加到混频电路81上。振荡电路80产生频率取决于PLL电路106提供的频率信号的本振信号。混频电路81将调谐电路79提供的信号与本振信号混频，产生中频(IF)信号，送至IF调谐电路84。
在选择UHF时，UHF块76的调谐电路87按照调谐电压产生电路102提供的调谐电压进行调谐，选择相应频率属UHF频带的信号。这样得到的信号送至放大电路88放大后通过调谐电路89加到混频电路91上。振荡电路90产生频率取决于PLL电路106提供的频率信号的本振信号。混频电路91将调谐电路89提供的信号与本振信号混频，产生中频(IF)信号，送至IF调谐电路84。
IF调谐电路84调谐选择混频电路81或91提供的中频信号，这样得到的信号送至IF放大电路92。经放大电路92放大的中频信号送至SWA滤波电路94，滤去中频信号中的不必要频率分量。这样得到的中频信号送至解调电路96，从中解调出图像信号和伴音信号。所得到的图像信号通过接线端98输出，而伴音信号通过接线端99输出。此外，解调电路96得出的RFAGC(射频自动增益控制)信号送至放大电路78和88，对放大电路78和88进行增益控制。解调电路96得出的IFAGC(中频自动增益控制)信号送至IF放大电路92，对放大电路92进行增益控制。解调电路96得出的AFT信号通过接线端100输出。
调谐电压产生电路102上加有从电视控制器26通过接线端104送来的频率设置信号，用来选择频道。调谐电压产生电路102根据上述频率设置信号产生调谐电压，送至调谐电路78、88和PLL电路106。PLL电路106上加有电视控制器26送来的设置频率的数据SDA和时钟信号SCL。PLL电路106根据数据SDA、时钟信号SCL和上述调谐电压产生频率信号，将所产生的频率信号和通过对所述频率信号进行分频得出的信号送至振荡电路80和90、解调电路96等。供电电路110在电视控制器26的控制下为调谐器28的各个电路供电。
电视控制器26包括一块微处理器芯片。图5示出了在本发明实施例中的电视控制器26执行的控制处理的流程图。电视控制器26通过将一个控制信号加到供电开关30上使供电开关30闭合从而调谐器28的供电电路110开始得到供电而启动这个处理。电视控制器26是按照CPU40提供的指令输出上述使供电开关30闭合的控制信号的。在步骤S10，根据插座22的引线端24向电视控制器26提供的天线连接检测信号是低电平还是高电平，确定天线10的插头14是否已插入插座22，也就是确定天线10是否已与个人计算机20连接。
如果在步骤S10确定天线10的插头14没有插入插座22，因此天线10还没有与个人计算机20连接，就在步骤S12电视控制器26向供电开关30发送控制信号，使供电开关30打开，从而中断通过供电开关30对调谐器28的供电电路110供电。这样，不断重复步骤S10和S12，直至确定天线10已与个人计算机20连接。在确定天线10的插头14已插入个人计算机20的插座22因而天线10已与个人计算机20连接时，就在步骤S14由调谐器28对整个WHF和UHF的频带进行扫描，加以监测，确定一个能接收到信号的频道。结果，调谐器28就产生了AFT信号。
于是，在步骤S16，利用调谐器28送至电视控制器26的AFT信号的电平确定是否AFT信号由于如图3所示那样的S型特性成为具有Vcc/2的电平，即是否正常接收到一个来自任何广播台的信号。如果在步骤S16确定正常接收到一个来自任何广播台的信号，就在步骤S18执行常规的信号接收处理程序。
如果在步骤S16确定没有正常接收到来自任何广播台的信号，就在步骤S20电视控制器26向供电开关30提供控制信号，使供电开关30打开，中断通过供电开关30对调谐器28的供电电路110供电。于是，在步骤S22，电视控制器26通知CPU40，不能正常执行信号接收。这样，在步骤S24，电视控制器26就进入等待CPU40提供指令的状态。
因此，在本发明的这个实施例中，无论是在天线10没有与个人计算机20连接的情况下还是在不能正常接收来自任何广播台的信号的情况下，都能中断对调谐器28的供电电路110供电，因此有效地降低了功率消耗，从而可以延长个人计算机20的驱动时间。
步骤S14和S16的操作是利用调谐器28执行的信号接收确定操作。步骤S12和S20都是利用供电开关30执行的供电中断操作。步骤S10的操作是利用插座22的接地端23和引线端24执行的天线连接检测操作。
在天线10没有与个人计算机20连接时，通常不能正常接收任何广播台的信号。因此，能在步骤S16确定天线10没有与个人计算机20连接。所以，可以省去步骤S10和S12，省去引线端24，从而简化了电视控制器26执行的操作和插座22的结构。
本发明并不局限于上述实施例，在不背离本发明的专利保护范围内可以有许多变型和修改型。
例如，虽然是以笔记本型个人计算机为例进行说明的，但本发明也可用于其他由电池供电的设备，如液晶显示电视机。此外，也可以不是电视机的调谐器而是无线电设备的调谐器。
1998年2月17日递交的基础日本专利申请No.10-35178列作本发明的参考。

Claims (17)

1．一种调谐设备的控制器，其特征是所述控制器包括：
一个信号接收确定单元(26)，所述单元根据一个调谐器(28)提供的指示信号接收状况的信号确定所执行的信号接收是否正常；以及
一个供电中断单元(30)，所述单元在所述信号接收确定单元(26)确定所执行的信号接收不正常时中断对所述调谐器(28)供电。
2．一种调谐设备的控制器，其特征是所述控制器包括：
一个天线连接检测单元(23,24)，用来检测天线(10)是否已与所述调谐设备连接；以及
一个供电中断单元(30)，所述单元在所述天线连接检测单元(23,24)确定所述天线(10)没有与所述调谐设备连接时中断对一个调谐器(28)供电。
3．按权利要求1所述的调谐设备的控制器，其特征是所述控制器还包括一个天线连接检测单元(23,24)，用来检测天线(10)是否已与所述调谐设备连接，
而其中所述供电中断单元(30)在所述天线连接检测单元(23,24)确定所述天线(10)没有与所述调谐设备连接时中断对一个调谐器(28)供电。
4．按权利要求1所述的调谐设备的控制器，其特征是由电池对所述调谐器(28)进行供电的。
5．按权利要求2所述的调谐设备的控制器，其特征是由电池对所述调谐器(28)进行供电的。
6．按权利要求1所述的调谐设备的控制器，其特征是所述调谐设备包括一个笔记本型个人计算机。
7．按权利要求2所述的调谐设备的控制器，其特征是所述调谐设备包括一个笔记本型个人计算机。
8．按权利要求1所述的调谐设备的控制器，其特征是所述调谐器(28)提供的指示信号接收状况的所述信号包括一个在信号接收正常执行时呈S型特性的自动细调信号。
9．按权利要求2所述的调谐设备的控制器，其特征是所述调谐器(28)提供的指示信号接收状况的所述信号包括一个在信号接收正常执行时呈S型特性的自动细调信号。
10．按权利要求2所述的调谐设备的控制器，其特征是所述天线连接检测单元(23,24)是通过检测所述天线(10)的一个插头(14)是否已插入所述调谐设备的一个插座(22)来检测所述天线(10)是否已与所述调谐设备连接的。
11．按权利要求3所述的调谐设备的控制器，其特征是所述天线连接检测单元(23,24)是通过检测所述天线(10)的一个插头(14)是否已插入所述调谐设备的一个插座(22)来检测所述天线(10)是否已与所述调谐设备连接的。
12．一种调谐设备的控制器，其特征是所述控制器包括：
一个供电开关(30)，用来实施对一个调谐器(28)供电；以及
一个控制单元(26)，所述单元根据所述调谐器(28)提供的指示信号接收状况的信号确定所执行的信号接收是否正常和控制所述供电开关(30)，使得在所执行的信号接收不正常时不对所述调谐器(28)供电。
13．一种调谐设备的控制器，其特征在是所述控制器包括：
一个天线连接部(23,24)，一个天线(10)通过这个连接部与所述调谐设备连接；
一个供电开关(30)，用来实施对一个调谐器(28)供电；以及
一个控制单元(26)，所述单元根据所述天线连接部(23,24)提供的信号确定所述天线(10)是否已通过所述天线连接部(23,24)与所述调谐设备连接和控制所述供电开关(30)，使得在所述天线(10)没有与所述调谐设备连接时不对所述调谐器(28)供电。
14．按权利要求12所述的调谐设备的控制器，其特征是所述控制器还包括一个将一个天线(10)与所述调谐设备连接起来的天线连接部(23,24)，所述控制器根据所述天线连接部(23,24)提供的信号确定所述天线(10)是否已通过所述天线连接部(23,24)与所述调谐设备连接和控制所述供电开关(30)，使得在所述天线(10)没有与所述调谐设备连接时不对所述调谐器(28)供电。
15．一种控制对调谐设备的调谐器供电的方法，所述方法包括下列步骤：
a)根据所述调谐器提供的指示信号接收状况的信号确定所执行的信号接收是否正常；以及
b)如果在所述步骤a)确定所执行的信号接收不正常，就中断对所述调谐器供电。
16．一种控制对调谐设备的调谐器供电的方法，所述方法包括下列步骤：
a)检测天线是否已与所述调谐设备连接；以及
b)如果在所述步骤a)确定天线没有与所述调谐设备连接，就中断对所述调谐器供电。
17．按权利要求15所述的方法，所述方法还包括下列步骤；
c)检测天线是否已与所述调谐设备连接；以及
d)如果在所述步骤c)确定天线没有与所述调谐设备连接，就中断对所述调谐器供电。
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