TWI528800B - High resolution multimedia interface device, communication system and hot plug control method - Google Patents
High resolution multimedia interface device, communication system and hot plug control method Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/006—Details of the interface to the display terminal
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- 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
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
- H04N21/43635—HDMI
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2370/00—Aspects of data communication
- G09G2370/12—Use of DVI or HDMI protocol in interfaces along the display data pipeline
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Description
本發明係有關於具有根據HDMI(High-Definition Multimedia Interface)規格之介面的高解析多媒體介面裝置(HDMI裝置)。 The present invention relates to a high-resolution multimedia interface device (HDMI device) having an interface according to the HDMI (High-Definition Multimedia Interface) specification.
HDMI係以數位信號傳送影像/聲音的通訊介面的標準 規格，在最近，提供具有根據該HDMI規格之介面的各種機器。 HDMI is the standard for transmitting video/audio communication interfaces with digital signals. Specifications, recently, provide a variety of machines with interfaces based on the HDMI specification.
HDMI規格的通訊系統係由送出HDMI信號的供給機器、與接收HDMI信號的接收機器所構成，並經由HDMI電纜連接供給機器與接收機器(參照專利文獻1)。 The communication system of the HDMI standard is composed of a supply device that sends out an HDMI signal and a receiver that receives an HDMI signal, and connects the supply device and the receiver via an HDMI cable (see Patent Document 1).
供給機器係例如是藍光碟播放機、攝影機、攜帶式裝置等。接收機器係例如是HD(High Definition)電視等的監視器或投影機等。 The supply machine is, for example, a Blu-ray disc player, a video camera, a portable device, or the like. The receiver is, for example, a monitor such as an HD (High Definition) television, a projector, or the like.
在該通訊系統，以HDMI電纜連接供給機器與接收機器時，執行用以在供給機器與接收機器之間傳送HDMI信號的處理。 In the communication system, when the supply device and the receiver are connected by an HDMI cable, processing for transmitting an HDMI signal between the supply device and the receiver is performed.
在第1圖，表示HDMI信號收發順序的一例。 In the first diagram, an example of the HDMI signal transmission and reception sequence is shown.
參照第1圖，首先，供給機器將既定電壓(例如+5V)供給至接收機器(步驟S100)後，接收機器接受該電壓供給後，將熱插頭檢測信號傳送至供給機器(步驟S101)。 Referring to Fig. 1, first, after the supply device supplies a predetermined voltage (for example, +5 V) to the receiver (step S100), the receiver receives the voltage supply, and then transmits the hot plug detection signal to the supply device (step S101).
供給機器係根據來自接收機器的熱插頭檢測信號，識別接收機器與本身機器連接。 The supply machine recognizes that the receiver is connected to its own machine based on the hot plug detection signal from the receiver.
收到熱插頭檢測信號的供給機器係向接收機器的EDID(Extended Display Identification Data)資訊存取(步驟S102)，接收機器將本身所保持之EDID資訊傳送至供給機器(步驟S103)。在此，EDID資訊係表示關於接收機器所對應之功能或性能(具體而言，格式或解析度等)的資訊的資料組。 The supply device that receives the hot plug detection signal accesses the EDID (Extended Display Identification Data) information to the receiver (step S102), and the receiver transmits the EDID information held by itself to the supply device (step S103). Here, the EDID information is a data set representing information on the function or performance (specifically, format or resolution, etc.) corresponding to the receiver.
供給機器係根據從接收機器所取得之EDID資訊，識別 在接收機器可播放之影像/聲音的格式或解析度後，以被稱為TMDS(Transition Minimized Differential Signaling)的傳送方式向接收機器傳送對應於該格式或解析度的影像/聲音信號(步驟S104)。 The supply machine is identified based on the EDID information obtained from the receiver. After the format or resolution of the image/sound that can be played by the receiver, the image/sound signal corresponding to the format or resolution is transmitted to the receiver in a transmission mode called TMDS (Transition Minimized Differential Signaling) (step S104) .
接收機器係從供給機器接收TMDS信號(步驟S105)。除了TMDS信號以外，亦將時鐘信號或控制信號從供給機器向接收機器供給。接收機器係按照控制信號，進行根據時鐘信號之TMDS信號的播放等的處理。 The receiver receives the TMDS signal from the supply machine (step S105). In addition to the TMDS signal, a clock signal or a control signal is also supplied from the supply machine to the receiver. The receiver performs processing such as playback of the TMDS signal based on the clock signal in accordance with the control signal.
在第2圖，表示接收機器之一構成例。 In Fig. 2, an example of the configuration of the receiver is shown.
參照第2圖，接收機器具有HDMI連接器101、記憶體102及HDMI接收器IC(Integrated Circuit)103。 Referring to Fig. 2, the receiver has an HDMI connector 101, a memory 102, and an HDMI receiver IC (Integrated Circuit) 103.
記憶體102係EEPROM(Electrically Erasable Programmable Read Only Memory)等之不揮發性記憶體，並保持EDID資訊。 The memory 102 is a non-volatile memory such as an EEPROM (Electrically Erasable Programmable Read Only Memory) and holds EDID information.
HDMI連接器101係19支腳之標準型式的連接器。第19支腳係用以輸出熱插頭檢測信號的接腳。從供給機器將+5V的電壓供給至第18支腳。 The HDMI connector 101 is a standard type connector of 19 legs. The 19th leg is a pin for outputting a hot plug detection signal. The +5V voltage is supplied from the supply machine to the 18th leg.
第18支腳係經由電阻元件與第19支腳連接，+5V的電壓被供給至第18支腳時，電流流至電阻元件，而自第19支腳輸出熱插頭檢測信號(+5V的信號)。 The 18th leg is connected to the 19th leg via a resistive element. When the voltage of +5V is supplied to the 18th leg, current flows to the resistive element, and the hot plug detection signal (+5V signal) is output from the 19th leg. ).
第15支腳及第16支腳係用以讀出儲存於記憶體102之EDID資訊的接腳。這些第15支腳及第16支腳係分別與記憶體102連接，而且與HDMI接收器IC103連接。 The 15th leg and the 16th leg are used to read the pin of the EDID information stored in the memory 102. These 15th and 16th legs are respectively connected to the memory 102 and connected to the HDMI receiver IC 103.
利用剩下之接腳的一部分，接收來自供給機器的TMDS 信號、時鐘信號及控制信號。HDMI接收器IC103係按照控制信號，進行根據時鐘信號之TMDS信號的播放處理。 Receive TMDS from the supply machine using a portion of the remaining pins Signal, clock signal and control signal. The HDMI receiver IC 103 performs playback processing of the TMDS signal according to the clock signal in accordance with the control signal.
在第3圖，表示接收機器之別的構成例。 Fig. 3 shows another configuration example of the receiver.
第3圖所示的接收機器係從第2圖所示的接收機器拿掉記憶體102，而構成為HDMI接收器IC103保持EDID資訊104。 The receiver shown in Fig. 3 removes the memory 102 from the receiver shown in Fig. 2, and the HDMI receiver IC 103 holds the EDID information 104.
在第3圖所示的接收機器，HDMI接收器IC103係經由第15支及第16支腳受理來自供給機器的存取，並自第15支及第16支腳輸出本身所保持之EDID資訊104。其他的動作係與第2圖所示者相同。 In the receiver shown in FIG. 3, the HDMI receiver IC 103 accepts access from the supply device via the fifteenth and sixteenth legs, and outputs the EDID information 104 held by itself from the fifteenth and sixteenth legs. . The other operations are the same as those shown in Fig. 2.
上述之第2圖及第3圖所示的接收機器係都與本身機器是否是電源ON狀態無關，+5V的電壓被供給至第18支腳時，自第19支腳輸出+5V的熱插頭檢測信號。 The receiver systems shown in Figures 2 and 3 above are independent of whether the device itself is powered ON. When the +5V voltage is supplied to the 18th leg, the +5V hot plug is output from the 19th pin. Detection signal.
[先行技術文獻] [Advanced technical literature]
[專利文獻1]特開2011-239386號公報 [Patent Document 1] JP-A-2011-239386
如上述所示，上述之第2圖及第3圖所示的接收機器係都構成為即使是電源OFF狀態，從供給機器供給+5V的電壓時，將+5V的熱插頭檢測信號輸出至供給機器。另一方面，供給機器未具有檢測出是否已送上與本身機器連接之接收機器之電源的功能。因此，在第2圖及第3圖所示的接收機器，在電源OFF狀態與供給機器連接的情況，發生以下所示的問題。此外，在此，電源OFF狀態不是待機 狀態(所謂的備用狀態)，而意指接收機器未與商用交流電源連接之狀態。 As described above, the receiver systems shown in the second and third figures described above are configured to output a +5V hot plug detection signal to the supply when a voltage of +5V is supplied from the supply device even when the power is turned off. machine. On the other hand, the supply machine does not have a function of detecting whether or not the power of the receiver connected to the own device has been sent. Therefore, in the receiver shown in FIGS. 2 and 3, when the power is turned off and connected to the supply device, the following problems occur. In addition, here, the power OFF state is not standby. The state (so-called standby state) means the state in which the receiver is not connected to commercial AC power.
首先，說明在電源OFF狀態將第2圖所示的接收機器與供給機器連接之情況所發生的問題。 First, a problem that occurs when the receiver shown in Fig. 2 is connected to the supply device in the power OFF state will be described.
供給機器係從電源OFF狀態之接收機器收到+5V的熱插頭檢測信號後，從接收機器內的記憶體102讀取EDID資訊。在第2圖所示的接收機器，因為EDID資訊係儲存於是不揮發性記憶體的記憶體102，所以即使接收機器未被送上電源，供給機器亦可從記憶體102讀取EDID資訊。 The supply machine reads the EDID information from the memory 102 in the receiver after receiving the +5V hot plug detection signal from the receiver of the power OFF state. In the receiver shown in Fig. 2, since the EDID information is stored in the memory 102 which is a non-volatile memory, the supply device can read the EDID information from the memory 102 even if the receiver is not powered.
供給機器係從電源OFF狀態之接收機器取得EDID資訊時，將TMDS信號供給至電源OFF狀態之接收機器。由於將TMDS信號供給至電源OFF狀態之接收機器，在接收機器的電路發生漏電流，結果，有接收機器發生誤動作的情況。 When the supply device acquires EDID information from the receiver in the power-off state, the TMDS signal is supplied to the receiver of the power-off state. Since the TMDS signal is supplied to the receiver of the power supply OFF state, a leakage current occurs in the circuit of the receiver, and as a result, the receiver malfunctions.
此外，一般，HDMI接收器IC103係具有誤動作防止功能，在接收機器被送上電源的情況，藉該誤動作防止功能，不會發生該漏電流所造成之誤動作。可是，在如上述所示接收機器未被送上電源的情況，因為誤動作防止功能不作用，所以漏電流所造成之誤動作變得嚴重。 Further, in general, the HDMI receiver IC 103 has a malfunction prevention function, and when the power is supplied to the receiver, the malfunction prevention function does not cause malfunction due to the leakage current. However, in the case where the receiver is not supplied with power as described above, since the malfunction prevention function does not function, the malfunction caused by the leakage current becomes severe.
其次，說明在電源OFF狀態將第3圖所示的接收機器與供給機器連接之情況所發生的問題。 Next, a description will be given of a problem that occurs when the receiver shown in Fig. 3 is connected to the supply device in the power OFF state.
供給機器係從電源OFF狀態之接收機器收到+5V的熱插頭檢測信號後，對接收機器內的EDID資訊104存取。在第3圖所示的接收機器，因為EDID資訊104係由HDMI接收器IC103所保持，所以在接收機器未被送上電源的情 況，供給機器無法對HDMI接收器IC103存取，而無法取得EDID資訊104。 The supply machine accesses the EDID information 104 in the receiver after receiving a +5V hot plug detection signal from the receiver of the power OFF state. In the receiver shown in FIG. 3, since the EDID information 104 is held by the HDMI receiver IC 103, the receiver is not powered. In this case, the supply machine cannot access the HDMI receiver IC 103, and the EDID information 104 cannot be obtained.
供給機器係在無法取得EDID資訊的情況，因為無法識別接收機器的功能或性能(格式或解析度)，所以不會向接收機器供給TMDS信號。 The supply machine is in a situation where the EDID information cannot be obtained. Since the function or performance (format or resolution) of the receiver cannot be recognized, the TMDS signal is not supplied to the receiver.
依此方式，供給機器係在收到+5V的熱插頭檢測信號後，無法取得EDID資訊的情況，因為不會向接收機器供給TMDS信號，所以即使送上接收機器的電源，亦無法在接收機器顯示影像。 In this way, the supply machine cannot obtain the EDID information after receiving the +5V hot plug detection signal, because the TMDS signal is not supplied to the receiver, so even if the power supply to the receiver is sent, it cannot be at the receiver. Display images.
例如，在供給機器與接收機器經由HDMI電纜連接之狀態，在送上供給機器的電源後，送上接收機器之電源的情況，如上述所示，供給機器無法取得接收機器的EDID資訊，而有無法在接收機器顯示影像的情況。 For example, when the supply device and the receiver are connected via the HDMI cable, after the power supply to the device is supplied and the power of the receiver is supplied, as described above, the supply device cannot obtain the EDID information of the receiver. It is not possible to display images on the receiver.
本發明之目的在於提供可解決上述之誤動作或無法顯示影像之問題的高解析多媒體介面裝置、通訊系統及熱插頭控制方法。 It is an object of the present invention to provide a high resolution multimedia interface device, a communication system, and a hot plug control method that can solve the above-mentioned problems of malfunction or failure to display images.
為了達成該目的，若依據本發明的一形態，提供一種高解析多媒體介面裝置，係具有經由通訊電纜與外部裝置連接的連接器部，該連接器部係至少包括從該外部裝置被供給既定電壓的第1接腳、與輸出表示有無與該外部裝置之連接之熱插頭檢測信號的第2接腳，該高解析多媒體介面裝置係具有：控制部，係在該高解析多媒體介面裝置被送上電源時，輸出表示該主旨的第1信號；及 電路，係在該第1信號未被輸出的情況，將低位準或接地電位輸出至該第2接腳。 In order to achieve the object, according to an aspect of the present invention, a high-resolution multimedia interface device having a connector portion connected to an external device via a communication cable, the connector portion including at least a predetermined voltage supplied from the external device The first pin and the second pin that outputs a hot plug detection signal indicating whether or not the external device is connected to the external device, the high-resolution multimedia interface device having a control unit that is sent to the high-resolution multimedia interface device When the power is turned on, the first signal indicating the subject is output; and The circuit outputs a low level or a ground potential to the second pin when the first signal is not output.
若依據本發明之別的形態，提供一種高解析多媒體介面裝置，係具有經由通訊電纜與外部裝置連接的連接器部，該連接器部係至少包括從該外部裝置被供給既定電壓的第1接腳、與輸出表示有無與該外部裝置之連接之熱插頭檢測信號的第2接腳，該高解析多媒體介面裝置係具有：控制部，係在該高解析多媒體介面裝置被送上電源時，輸出表示該主旨的第1信號；及電路，係在該第1信號未被輸出的情況，將該第1接腳與該第2接腳之間設為斷路狀態。 According to another aspect of the present invention, there is provided a high-resolution multimedia interface device having a connector portion connected to an external device via a communication cable, the connector portion including at least a first connection to which a predetermined voltage is supplied from the external device a second pin that outputs a hot plug detection signal indicating whether or not the external device is connected to the external device, the high-resolution multimedia interface device having a control unit that outputs when the high-resolution multimedia interface device is powered on The first signal indicating the purpose; and the circuit is such that the first pin and the second pin are in an open state when the first signal is not output.
若依據本發明之另外的形態，提供一種通訊系統，該通訊系統係：具有：由上述之高解析多媒體介面裝置所構成的接收機器；及經由通訊電纜與該接收機器連接的供給機器；該供給機器係將既定電壓供給至該接收機器，從該接收機器收到該既定電壓的熱插頭檢測信號時，識別該接收機器與本身機器連接。 According to another aspect of the present invention, there is provided a communication system comprising: a receiver constructed by the above-described high resolution multimedia interface device; and a supply device connected to the receiver via a communication cable; the supply The machine supplies a predetermined voltage to the receiver, and when the receiver receives the hot plug detection signal of the predetermined voltage, it recognizes that the receiver is connected to its own machine.
若依據本發明之其他的形態，提供一種熱插頭控制方法，係在高解析多媒體介面裝置所進行之熱插頭控制方法，該高解析多媒體介面裝置係具有經由通訊電纜與外部裝置連接的連接器部，該連接器部係至少包括從該外部裝 置被供給既定電壓的第1接腳、與輸出表示有無與該外部裝置之連接之熱插頭檢測信號的第2接腳：在該高解析多媒體介面裝置被送上電源的期間，將被供給至該第1接腳之該既定電壓信號作為熱插頭檢測信號，自該第2接腳輸出；在該期間以外的期間，將該第2接腳設為低位準或接地電位，或者將該第1接腳與該第2接腳之間設為斷路狀態。 According to another aspect of the present invention, a hot plug control method is provided, which is a hot plug control method performed by a high resolution multimedia interface device having a connector portion connected to an external device via a communication cable. The connector portion includes at least the external device A first pin that is supplied with a predetermined voltage and a second pin that outputs a hot plug detection signal indicating whether or not the external device is connected to the external device is supplied to the high-resolution multimedia interface device while being supplied with power The predetermined voltage signal of the first pin is output from the second pin as a hot plug detection signal, and the second pin is set to a low level or a ground potential during a period other than the period, or the first one is set The pin is disconnected from the second pin.
其次，參照圖面，說明本發明之實施形態。 Next, an embodiment of the present invention will be described with reference to the drawings.
(第1實施形態) (First embodiment)
第4圖係表示本發明之第1實施形態的HDMI裝置之構成的方塊圖。 Fig. 4 is a block diagram showing the configuration of an HDMI device according to the first embodiment of the present invention.
第4圖所示之HDMI裝置係HD(High Definition)電視等之監視器或投影機等之接收機器，其主要部由HDMI連接器11、記憶體12、HDMI接收器IC13及開關電路14所構成。 The HDMI device shown in FIG. 4 is a receiver such as a HD (High Definition) TV or a receiver such as a projector, and the main portion thereof is composed of an HDMI connector 11, a memory 12, an HDMI receiver IC 13, and a switch circuit 14. .
HDMI連接器11及記憶體12係與第2圖所示之HDMI連接器101及記憶體102相同。此外，作為HDMI連接器11，除了標準型式的連接器以外，亦可使用例如29支接腳的連接器。 The HDMI connector 11 and the memory 12 are the same as the HDMI connector 101 and the memory 102 shown in FIG. Further, as the HDMI connector 11, in addition to the standard type of connector, a connector of, for example, 29 pins can be used.
開關電路14係在控制信號是第1位準(高位準)的情況，將供給第18支腳之+5V的電壓信號作為熱插頭檢測 信號，自第19支腳輸出，而在控制信號是第2位準(低位準或接地電位)的情況，將比+5V低之電壓(低位準或接地電位)的信號作為熱插頭檢測信號，自第19支腳輸出。 The switch circuit 14 is configured to detect a +5V voltage signal of the 18th leg as a hot plug when the control signal is at the first level (high level). The signal is output from the 19th pin, and when the control signal is the 2nd level (low level or ground potential), the signal lower than +5V (low level or ground potential) is used as the hot plug detection signal. Output from the 19th foot.
具體而言，開關電路14具有電阻元件15~17、n型MOSFET18及電晶體19。 Specifically, the switch circuit 14 has resistive elements 15 to 17, an n-type MOSFET 18, and a transistor 19.
電晶體19係NPN電晶體，射極接地。 The transistor 19 is an NPN transistor with the emitter grounded.
電阻元件15的一端係與電阻元件16的一端連接，而且與HDMI連接器11之第18支腳連接。電阻元件15的另一端係與n型MOSFET18的汲極連接，而且與HDMI連接器11之第19支腳連接。亦可採用NPN電晶體，替代n型MOSFET，但是在從第18支腳所供給之+5V的電壓信號，因為有電流容量上的限制，所以使用耗電流更少的n型MOSFET比較方便。 One end of the resistive element 15 is connected to one end of the resistive element 16, and is connected to the 18th leg of the HDMI connector 11. The other end of the resistive element 15 is connected to the drain of the n-type MOSFET 18, and is connected to the 19th leg of the HDMI connector 11. An NPN transistor can also be used instead of an n-type MOSFET. However, since the +5V voltage signal supplied from the 18th pin has a limitation in current capacity, it is convenient to use an n-type MOSFET that consumes less current.
電阻元件16的另一端係與n型MOSFET18的閘極連接，而且與電晶體19的集極連接。n型MOSFET18的源極接地。 The other end of the resistive element 16 is connected to the gate of the n-type MOSFET 18 and to the collector of the transistor 19. The source of the n-type MOSFET 18 is grounded.
電晶體19的基極係經由電阻元件17與HDMI接收器IC13之控制信號輸出端子連接。 The base of the transistor 19 is connected to the control signal output terminal of the HDMI receiver IC 13 via the resistive element 17.
電阻元件15的電阻值是1kΩ，這是根據HDMI規格的值。電阻元件16、17的電阻值都是約10kΩ。 The resistance value of the resistance element 15 is 1 kΩ, which is a value according to the HDMI specification. The resistance values of the resistance elements 16, 17 are all about 10 kΩ.
HDMI接收器IC13係在HDMI裝置之送上電源的期間，自控制信號輸出端子輸出高位準的控制信號。在該期間以外的期間(HDMI裝置之未送上電源的狀態)，控制信號輸出端子的電壓被設為低位準(接地電位)。此構成係可藉由使 用MOSFET等之開關元件來實現。在此，送上電源的期間意指不管接收機器進行平常動作或位於備用狀態，接收機器都與商用交流電源連接的期間。 The HDMI receiver IC 13 outputs a high level control signal from the control signal output terminal while the HDMI device is powered on. In a period other than the period (the state in which the HDMI device is not powered), the voltage of the control signal output terminal is set to a low level (ground potential). This composition can be made by It is realized by a switching element such as a MOSFET. Here, the period during which the power is supplied means a period during which the receiver is connected to the commercial AC power source regardless of whether the receiver performs the normal operation or is in the standby state.
其次，說明本實施形態之HDMI裝置的動作。 Next, the operation of the HDMI device of this embodiment will be described.
在第5圖，以模式表示在電源OFF狀態的HDMI裝置，+5V的電壓被供給至HDMI連接器11之第18支腳之情況的動作。 In the fifth diagram, the HDMI device in the power-off state is shown as a mode in which the voltage of +5 V is supplied to the 18th leg of the HDMI connector 11.
如第5圖所示，在電源OFF狀態的HDMI裝置，因為HDMI接收器IC13係未起動，所以經由電阻元件17將低位準的控制信號供給至電晶體19的基極。因此，電晶體19成為OFF狀態。 As shown in FIG. 5, in the HDMI device in the power-off state, since the HDMI receiver IC 13 is not activated, a low-level control signal is supplied to the base of the transistor 19 via the resistance element 17. Therefore, the transistor 19 is in an OFF state.
在電晶體19為OFF狀態時，若+5V的電壓被供給至HDMI連接器11之第18支腳，則+5V的電壓被供給至n型MOSFET18的閘極。因為n型MOSFET18的臨限值電壓係比+5V小，所以n型MOSFET18成為ON狀態。 When the transistor 19 is in the OFF state, if a voltage of +5 V is supplied to the 18th leg of the HDMI connector 11, a voltage of +5 V is supplied to the gate of the n-type MOSFET 18. Since the threshold voltage of the n-type MOSFET 18 is smaller than +5 V, the n-type MOSFET 18 is turned on.
n型MOSFET18成為ON狀態時，因為第19支腳經由n型MOSFET18接地，所以第19支腳的電壓位準降低，而成為低位準。結果，自第19支腳所輸出之熱插頭檢測信號成為低位準。 When the n-type MOSFET 18 is in the ON state, since the 19th leg is grounded via the n-type MOSFET 18, the voltage level of the 19th leg is lowered to become a low level. As a result, the hot plug detection signal output from the 19th leg becomes a low level.
在熱插頭檢測信號是低位準的情況，供給機器係不識別HDMI裝置。 In the case where the hot plug detection signal is low, the supply device does not recognize the HDMI device.
在第6圖，以模式表示在電源ON狀態的HDMI裝置，+5V的電壓被供給至HDMI連接器11之第18支腳之情況的動作。 In the sixth diagram, the operation of the HDMI device in the power-on state is performed in a mode in which the voltage of +5 V is supplied to the 18th leg of the HDMI connector 11.
如第6圖所示，在電源ON狀態的HDMI裝置，因為HDMI接收器IC13係經由電阻元件17將高位準的控制信號供給至電晶體19的基極。因此，電晶體19成為ON狀態。 As shown in FIG. 6, in the HDMI device in the power-on state, the HDMI receiver IC 13 supplies a high-level control signal to the base of the transistor 19 via the resistive element 17. Therefore, the transistor 19 is in an ON state.
電晶體19成為ON狀態時，n型MOSFET18的閘極經由電晶體19接地。結果，n型MOSFET18之閘極的電壓位準成為比其臨限值電壓小的位準(低位準)，而n型MOSFET18成為OFF狀態。 When the transistor 19 is in the ON state, the gate of the n-type MOSFET 18 is grounded via the transistor 19. As a result, the voltage level of the gate of the n-type MOSFET 18 becomes a level lower than the threshold voltage (low level), and the n-type MOSFET 18 is turned off.
n型MOSFET18成為OFF狀態時，第18支腳與第19支腳成為只是經由電阻元件15連接之狀態，而自第19支腳輸出+5V的熱插頭檢測信號。 When the n-type MOSFET 18 is turned off, the 18th leg and the 19th leg are connected only via the resistance element 15, and a +5V hot plug detection signal is output from the 19th leg.
供給機器係收到+5V的熱插頭檢測信號時，識別HDMI裝置與本身機器連接。然後，在供給機器與HDMI裝置之間，根據第1圖所示之步驟S102至S105的步驟進行處理。 When the supply machine receives a +5V hot plug detection signal, it recognizes that the HDMI device is connected to its own machine. Then, between the supply device and the HDMI device, processing is performed in accordance with the steps of steps S102 to S105 shown in Fig. 1.
若依據本實施形態的HDMI裝置，在電源OFF之狀態與供給機器連接的情況，即使+5V的電壓被供給至HDMI連接器11之第18支腳，自第19支腳所輸出之熱插頭檢測信號的位準亦是低位準。因此，供給機器不會識別電源OFF狀態之HDMI裝置對本身機器的連接。因此，不會從供給機器向電源OFF狀態之HDMI裝置供給TMDS信號，因TMDS信號的供給所造成之漏電流而HDMI裝置發生誤動作的事亦不會發生。 According to the HDMI device of the present embodiment, even when the power supply is turned off and the supply device is connected, even if the voltage of +5 V is supplied to the 18th leg of the HDMI connector 11, the hot plug detection from the 19th leg is detected. The level of the signal is also low. Therefore, the supply machine does not recognize the connection of the HDMI device of the power OFF state to its own machine. Therefore, the TMDS signal is not supplied from the supply device to the HDMI device in the power-off state, and the HDMI device malfunctions due to the leakage current caused by the supply of the TMDS signal.
(第2實施形態) (Second embodiment)
第7圖係表示本發明之第2實施形態的HDMI裝置之構成的方塊圖。 Fig. 7 is a block diagram showing the configuration of an HDMI device according to a second embodiment of the present invention.
本實施形態的HDMI裝置係從第4圖所示的HDMI裝置拿掉記憶體12，而構成為HDMI接收器IC13保持EDID資訊13a。 The HDMI device of the present embodiment removes the memory 12 from the HDMI device shown in Fig. 4, and the HDMI receiver IC 13 holds the EDID information 13a.
在本實施形態的HDMI裝置，HDMI接收器IC13係經由HDMI連接器11之第15支及第16支腳受理來自供給機器的存取，並自第15支及第16支腳輸出本身所保持之EDID資訊13a。其他的動作係與第1實施形態相同。 In the HDMI device of the present embodiment, the HDMI receiver IC 13 accepts access from the supply device via the 15th and 16th legs of the HDMI connector 11, and maintains the output from the 15th and 16th pins themselves. EDID Information 13a. The other operations are the same as in the first embodiment.
在本實施形態的HDMI裝置，亦與第1實施形態一樣，在電源OFF之狀態與供給機器連接的情況，即使+5V的電壓被供給至HDMI連接器11之第18支腳，自第19支腳所輸出之熱插頭檢測信號的位準亦是低位準。因此，供給機器不會識別電源OFF狀態之HDMI裝置對本身機器的連接。因此，供給機器不會為了取得EDID資訊而向電源OFF狀態之HDMI裝置存取。 In the same manner as in the first embodiment, the HDMI device of the present embodiment is connected to the supply device in the state where the power is turned off, and even if the voltage of +5 V is supplied to the 18th leg of the HDMI connector 11, from the 19th branch. The level of the hot plug detection signal output by the foot is also a low level. Therefore, the supply machine does not recognize the connection of the HDMI device of the power OFF state to its own machine. Therefore, the supply device does not access the HDMI device in the power-off state in order to obtain the EDID information.
又，在本實施形態的HDMI裝置，亦成為電源ON狀態時，自第19支腳輸出+5V的熱插頭檢測信號。收到該+5V的熱插頭檢測信號後，識別HDMI裝置對本身機器的連接後，從HDMI裝置取得EDID資訊，並將TMDS信號供給至HDMI裝置。若依據本動作，例如，在以HDMI電纜連接供給機器與電源OFF狀態之HDMI裝置後，送上HDMI裝置之電源的情況，就從供給機器向HDMI裝置供給TMDS信號。因此，在HDMI裝置根據TMDS信號顯示影像。 Further, in the HDMI device of the present embodiment, when the power is turned on, the hot plug detection signal of +5 V is output from the 19th leg. After receiving the +5V hot plug detection signal, after identifying the connection of the HDMI device to its own device, the EDID information is obtained from the HDMI device, and the TMDS signal is supplied to the HDMI device. According to this operation, for example, when the HDMI device that supplies the device and the power supply OFF state is connected by the HDMI cable, and the power of the HDMI device is supplied, the TMDS signal is supplied from the supply device to the HDMI device. Therefore, the HDMI device displays an image based on the TMDS signal.
以上所說明之各實施形態的HDMI裝置係本發明的一例，關於其構成或動作，亦可在不超出發明之主旨的範圍 內應用本專業者可理解的變更。 The HDMI device of each embodiment described above is an example of the present invention, and the configuration or operation thereof may be within the range not exceeding the gist of the invention. Changes that can be understood by those skilled in the art.
例如，亦可在第4圖及第7圖所示的HDMI裝置，HDMI接收器IC以外的控制部將控制信號供給至開關電路14。在此情況，亦可控制部係例如控制接收機器整體之動作的控制電路。 For example, in the HDMI device shown in FIGS. 4 and 7, the control unit other than the HDMI receiver IC supplies a control signal to the switch circuit 14. In this case, the control unit may be, for example, a control circuit that controls the operation of the entire receiver.
又，開關電路14係未限定為所圖示者，只要是可在控制信號是第1位準(高位準)的情況，將被供給至第1接腳(例如第18支腳)之+5V的電壓信號作為熱插頭檢測信號，自第2接腳(例如第19支腳)輸出，而在控制信號是第2位準(低位準)的情況，將比+5V低之電壓(低位準或接地電位)的信號作為熱插頭檢測信號，自第2接腳輸出者，任何構成都可。又，亦可替代MOSFET或電晶體等之半導體開關，而使用繼電器等之機械式開關。此時，若使用閂鎖繼電器，亦可使耗電力變成零，而方便。 Further, the switch circuit 14 is not limited to the one shown, and may be supplied to the +5V of the first pin (for example, the 18th leg) when the control signal is at the first level (high level). The voltage signal is used as the hot plug detection signal, which is output from the 2nd pin (for example, the 19th pin), and when the control signal is the 2nd level (low level), the voltage will be lower than +5V (low level or The signal of the ground potential is used as the hot plug detection signal, and it can be configured from the second pin output. Further, instead of a semiconductor switch such as a MOSFET or a transistor, a mechanical switch such as a relay can be used. At this time, if a latch relay is used, the power consumption can be made zero, which is convenient.
(第3實施形態) (Third embodiment)
第8圖係表示本發明之第3施形態的HDMI裝置之構成的方塊圖。 Fig. 8 is a block diagram showing the configuration of an HDMI device according to a third embodiment of the present invention.
第8圖所示之HDMI裝置係替代第4圖所示之HDMI裝置的開關電路14，使用開關電路20。HDMI連接器11、記憶體12及HDMI接收器IC13係與第4圖所示者相同。 The HDMI device shown in Fig. 8 replaces the switch circuit 14 of the HDMI device shown in Fig. 4, and the switch circuit 20 is used. The HDMI connector 11, the memory 12, and the HDMI receiver IC 13 are the same as those shown in FIG.
在第4圖所示的HDMI裝置，開關電路14係將開關設置於熱插頭檢測用的第2接腳(例如第19支腳)與接地電位之間的構成。而，在本實施形態，開關電路20係將開關設置於供給+5V的第1接腳(例如第18支腳)與熱插頭檢測 用的第2接腳(例如第19支腳)之間的構成。 In the HDMI device shown in FIG. 4, the switch circuit 14 has a configuration in which a switch is provided between a second pin (for example, the 19th leg) for detecting a hot plug and a ground potential. Further, in the present embodiment, the switch circuit 20 is provided with a switch for supplying a first pin (for example, the 18th leg) to which +5 V is supplied, and the hot plug is detected. The configuration between the second pin (for example, the 19th leg) used.
開關電路20具有電阻元件15與開關21。開關21係半導體開關。半導體開關係可藉電晶體或FET或者這些元件的組合構成。 The switching circuit 20 has a resistive element 15 and a switch 21. The switch 21 is a semiconductor switch. The semiconductor open relationship can be formed by a transistor or FET or a combination of these elements.
在控制信號是第1位準(高位準)的情況，開關21成為ON狀態，第18支腳與第19支腳之間成為經由電阻元件15短路的狀態。在此情況，被供給至第18支腳之+5V的電壓信號經由電阻元件15，作為熱插頭檢測信號，自第19支腳輸出。因此，供給機器係檢測出熱插頭檢測信號是高位準，而識別是接收機器的HDMI裝置。 When the control signal is at the first level (high level), the switch 21 is turned on, and the 18th leg and the 19th leg are short-circuited via the resistance element 15. In this case, the +5 V voltage signal supplied to the 18th leg is output from the 19th leg as a thermal plug detection signal via the resistance element 15. Therefore, the supply machine detects that the hot plug detection signal is at a high level, and the identification is an HDMI device of the receiver.
另一方面，在控制信號是第2位準(低位準或接地電位)的情況，開關21成為OFF狀態，第18支腳與第19支腳之間成為斷路狀態(高阻抗狀態)。在此情況，因為在第19支腳未被供給+5V的電壓信號，所以供給機器不識別是接收機器的HDMI裝置。 On the other hand, when the control signal is at the second level (low level or ground potential), the switch 21 is turned off, and the 18th leg and the 19th leg are in an open state (high impedance state). In this case, since the voltage signal of +5 V is not supplied to the 19th leg, the supply machine does not recognize the HDMI device which is the receiver.
第9圖表示HDMI裝置之電源OFF時的狀態。因為控制信號是第2位準(低位準)，所以開關21成為OFF狀態。在此情況，因為被供給至第18支腳之+5V的電壓信號不會經由電阻元件15，作為熱插頭檢測信號，自第19支腳輸出，所以供給機器不會識別是接收機器的HDMI裝置。 Fig. 9 shows the state when the power of the HDMI device is turned off. Since the control signal is the second level (low level), the switch 21 is turned OFF. In this case, since the +5V voltage signal supplied to the 18th leg does not pass through the resistance element 15 and is output as the hot plug detection signal from the 19th leg, the supply device does not recognize the HDMI device which is the receiver. .
第10圖表示HDMI裝置之電源ON時的狀態。因為控制信號是第1位準(高位準)，所以開關21成為短路狀態，被供給至第18支腳之+5V的電壓信號經由電阻元件15，作為熱插頭檢測信號，被供給至第19支腳。供給機器係可根 據自第19支腳所輸出之熱插頭檢測信號，識別HDMI機器。 Fig. 10 shows the state when the power of the HDMI device is turned ON. Since the control signal is at the first level (high level), the switch 21 is in a short-circuit state, and the +5V voltage signal supplied to the 18th leg is supplied to the 19th branch as a hot plug detection signal via the resistance element 15. foot. Supply machine system root The HDMI machine is identified based on the hot plug detection signal output from the 19th leg.
亦可開關電路20係以繼電器等之機械式開關構成。 Alternatively, the switch circuit 20 may be constituted by a mechanical switch such as a relay.
第11圖及第12圖係以機械式繼電器構成開關電路20的例子。開關電路20具有電阻元件15、23與繼電器22。繼電器22具有接點部22-1與線圈部22-2。線圈部22-2係例如由激磁線圈所構成。藉由電流流至線圈部22-2，而接點部22-1成為ON狀態。在電流未流至線圈部22-2時，接點部22-1成為OFF狀態。 11 and 12 are examples in which the switch circuit 20 is constituted by a mechanical relay. The switching circuit 20 has resistive elements 15, 23 and a relay 22. The relay 22 has a contact portion 22-1 and a coil portion 22-2. The coil portion 22-2 is constituted by, for example, an exciting coil. The current flows to the coil portion 22-2, and the contact portion 22-1 is turned on. When the current does not flow to the coil portion 22-2, the contact portion 22-1 is in an OFF state.
接點部22-1之一方的端子係經由電阻元件15與第18支腳連接，接點部22-1之另一方的端子係與第19支腳連接。線圈部22-2的一端係接地，線圈部22-2的另一端係與電阻元件23的一端連接。控制信號係被供給至電阻元件23的另一端。 The terminal of one of the contact portions 22-1 is connected to the 18th leg via the resistance element 15, and the other terminal of the contact portion 22-1 is connected to the 19th leg. One end of the coil portion 22-2 is grounded, and the other end of the coil portion 22-2 is connected to one end of the resistance element 23. The control signal is supplied to the other end of the resistance element 23.
第11圖表示HDMI裝置之電源OFF時的狀態。因為控制信號是第2位準(低位準)，所以接點部22-1成為斷路狀態。在此情況，因為第18支腳與第19支腳之間成為斷路狀態(高阻抗狀態)，所以被供給至第18支腳之+5V的電壓信號不會經由電阻元件15，作為熱插頭檢測信號，自第19支腳輸出。因此，供給機器不會識別是接收機器的HDMI裝置。 Fig. 11 shows the state when the power of the HDMI device is turned off. Since the control signal is the second level (low level), the contact portion 22-1 is in an open state. In this case, since the 18th leg and the 19th leg are in an open state (high impedance state), the +5V voltage signal supplied to the 18th leg does not pass through the resistance element 15 and is detected as a hot plug. Signal, output from the 19th leg. Therefore, the supply machine does not recognize the HDMI device that is the receiver.
第12圖表示HDMI機器之電源ON時的狀態。因為控制信號是第1位準(高位準)，所以接點部22-1成為短路狀態，被供給至第18支腳之+5V的電壓信號經由電阻元件15，作為熱插頭檢測信號，被供給至第19支腳。供給機器 係可根據自第19支腳所輸出之熱插頭檢測信號，識別HDMI機器。 Fig. 12 shows the state when the power of the HDMI device is turned ON. Since the control signal is at the first level (high level), the contact portion 22-1 is in a short-circuit state, and the +5V voltage signal supplied to the 18th leg is supplied as a hot plug detection signal via the resistance element 15 To the 19th foot. Supply machine The HDMI machine can be identified based on the hot plug detection signal output from the 19th leg.
若依據本實施形態的HDMI裝置，在電源OFF之狀態與供給機器連接的情況，因為+5V的電壓不會被供給至HDMI連接器11之第18支腳，所以自第19支腳所輸出之熱插頭檢測信號的位準不會成為高位準。因此，供給機器不會識別電源OFF狀態之HDMI裝置對本身機器的連接。因此，不會從供給機器向電源OFF狀態之HDMI裝置供給TMDS信號，因TMDS信號的供給所造成之漏電流而HDMI裝置發生誤動作的事亦不會發生。 According to the HDMI device of the present embodiment, when the power is turned off and the supply device is connected, since the voltage of +5 V is not supplied to the 18th leg of the HDMI connector 11, the output from the 19th leg is output. The level of the hot plug detection signal does not become a high level. Therefore, the supply machine does not recognize the connection of the HDMI device of the power OFF state to its own machine. Therefore, the TMDS signal is not supplied from the supply device to the HDMI device in the power-off state, and the HDMI device malfunctions due to the leakage current caused by the supply of the TMDS signal.
在本實施形態的HDMI裝置，亦與第1實施形態或第2實施形態一樣，作為開關電路，即使在機械式繼電器中亦可使用閂鎖繼電器。在此情況，因為僅在切換端子間之短路/斷路時供給控制電壓，所以可使其低耗電力化。 In the HDMI device of the present embodiment, as in the first embodiment or the second embodiment, a latching relay can be used as the switching circuit even in the mechanical relay. In this case, since the control voltage is supplied only during the short-circuit/open circuit between the switching terminals, it is possible to reduce the power consumption.
又，在本實施形態的HDMI裝置，亦亦可HDMI接收器IC以外的控制部將控制信號供給至開關電路20。在此情況，亦可控制部係例如控制接收機器整體之動作的控制電路。 Further, in the HDMI device of the present embodiment, a control unit other than the HDMI receiver IC may supply a control signal to the switch circuit 20. In this case, the control unit may be, for example, a control circuit that controls the operation of the entire receiver.
本專利申請係主張以於2012年9月25日所申請之PCT/JP2012/74555為基礎的優先權，在此取入該揭示的全部。 This patent application claims priority based on PCT/JP2012/74555 filed on Sep. 25, 2012, the entire disclosure of which is incorporated herein.
11‧‧‧HDMI連接器 11‧‧‧HDMI connector
12‧‧‧記憶體 12‧‧‧ memory
13‧‧‧HDMI接收器IC 13‧‧‧HDMI Receiver IC
14‧‧‧開關電路 14‧‧‧Switch circuit
15~17‧‧‧電阻元件 15~17‧‧‧resistive components
18‧‧‧n型MOSFET 18‧‧‧n type MOSFET
19‧‧‧電晶體 19‧‧‧Optoelectronics
第1圖係用以說明在HDMI規格的通訊系統所進行之 HDMI信號收發順序之一例的圖。 Figure 1 is used to illustrate the communication system implemented in the HDMI specification. A diagram of an example of the HDMI signal transmission and reception sequence.
第2圖係表示接收機器之一構成例的方塊圖。 Fig. 2 is a block diagram showing an example of the configuration of a receiver.
第3圖係表示接收機器之別的構成例的方塊圖。 Fig. 3 is a block diagram showing another configuration example of the receiver.
第4圖係表示本發明之第1實施形態的HDMI裝置之構成的方塊圖。 Fig. 4 is a block diagram showing the configuration of an HDMI device according to the first embodiment of the present invention.
第5圖係用以說明第4圖所示之HDMI裝置的電源OFF時之動作的模式圖。 Fig. 5 is a schematic view for explaining an operation when the power of the HDMI device shown in Fig. 4 is turned off.
第6圖係用以說明第4圖所示之HDMI裝置的電源ON時之動作的模式圖。 Fig. 6 is a schematic view for explaining the operation of the HDMI device shown in Fig. 4 when the power is turned ON.
第7圖係表示本發明之第2實施形態的HDMI裝置之構成的方塊圖。 Fig. 7 is a block diagram showing the configuration of an HDMI device according to a second embodiment of the present invention.
第8圖係表示本發明之第3施形態的HDMI裝置之構成的方塊圖。 Fig. 8 is a block diagram showing the configuration of an HDMI device according to a third embodiment of the present invention.
第9圖係用以說明第8圖所示之HDMI裝置的電源OFF時之動作的模式圖。 Fig. 9 is a schematic view for explaining the operation of the HDMI device shown in Fig. 8 when the power is turned off.
第10圖係用以說明第8圖所示之HDMI裝置的電源ON時之動作的模式圖。 Fig. 10 is a schematic view for explaining an operation when the power of the HDMI device shown in Fig. 8 is turned ON.
第11圖係用以說明本發明之第3施形態的HDMI裝置之變形例的圖。 Fig. 11 is a view for explaining a modification of the HDMI device of the third embodiment of the present invention.
第12圖係用以說明本發明之第3施形態的HDMI裝置之變形例的圖。 Fig. 12 is a view for explaining a modification of the HDMI device of the third embodiment of the present invention.
11‧‧‧HDMI連接器 11‧‧‧HDMI connector
12‧‧‧記憶體 12‧‧‧ memory
13‧‧‧HDMI接收器IC 13‧‧‧HDMI Receiver IC
14‧‧‧開關電路 14‧‧‧Switch circuit
15‧‧‧電阻元件 15‧‧‧Resistive components
16‧‧‧電阻元件 16‧‧‧Resistive components
17‧‧‧電阻元件 17‧‧‧Resistive components
18‧‧‧n型MOSFET 18‧‧‧n type MOSFET
19‧‧‧電晶體 19‧‧‧Optoelectronics
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| Application Number | Priority Date | Filing Date | Title |
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| JP2014538487A JP5943439B2 (en) | 2012-09-25 | 2013-09-24 | Electronic device, communication system, and hot plug control method |
| EP13842817.2A EP2902871A4 (en) | 2012-09-25 | 2013-09-24 | Electronic device, communication system, and hot-plug control method |
| US14/429,342 US10176140B2 (en) | 2012-09-25 | 2013-09-24 | HDMI apparatus of high-definition TV has switching circuit that outputs low-level/ground potential to second pin of HDMI connector if a first signal is not outputted |
| PCT/JP2013/075682 WO2014050807A1 (en) | 2012-09-25 | 2013-09-24 | Electronic device, communication system, and hot-plug control method |
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| PCT/JP2012/074555 WO2014049686A1 (en) | 2012-09-25 | 2012-09-25 | Hdmi device, communication system, and hot-plug control method |
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| CN110769308B (en) | 2019-12-25 | 2021-03-30 | 深圳创维－Rgb电子有限公司 | Signal channel switching method, display terminal and storage medium |
| CN112866608B (en) * | 2021-01-11 | 2022-07-05 | 浙江大华技术股份有限公司 | Adaptive setting method and device for HDMI resolution and electronic device |
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