CN103295554A - Integrated circuit capable of providing extension display sign data based on image signals - Google Patents
Integrated circuit capable of providing extension display sign data based on image signals Download PDFInfo
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- CN103295554A CN103295554A CN2012100443509A CN201210044350A CN103295554A CN 103295554 A CN103295554 A CN 103295554A CN 2012100443509 A CN2012100443509 A CN 2012100443509A CN 201210044350 A CN201210044350 A CN 201210044350A CN 103295554 A CN103295554 A CN 103295554A
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Abstract
An integrated circuit capable of providing extension display sign data based on image signals is suitable for a display comprising a plurality of image input ports. Each image input port is used for receiving one of various image signals sent by an electronic device. The integrated circuit comprises an extension display sign data storage unit used for storing a plurality of extension display sign data corresponding to the various image signals, a plurality of switches which are respectively connected with the image input ports through buses and a switch control unit used for judging states of the image input ports and recognizing types of the image signals. When the image input ports are in action states, the switch control unit can open the switches connected with the image input ports of the received image signals according to the types of the image signals to enable the electrode device to read extension display sign data corresponding to the image signals from the extension display sign data storage unit through the image input ports and the switches.
Description
Technical field
The present invention relates to a kind of integrated circuit, particularly relate to a kind of integrated circuit that the expanded scope flag data is provided based on image signal.
Background technology
Past is in order to allow electronic installation (example, main frame) can obtain the display device (example that it connects, LCD) allowed information such as signal scope, display device manufacturers can embedded several electronics erasable read-only memories of display device (Electrically-Erasable Programmable Read-Only Memory, EEPROM).Each electronics erasable read-only memory be respectively applied to store an expanded scope flag data (Extended Display Identification Data, EDID).Each expanded scope flag data corresponds to a kind of image signal respectively, digital visual interface (Digital Visual Interface for example, DVI) signal or HDMI (High Definition Multimedia Interface) (High Definition Multimedia Interface, HDMI) signal.And each expanded scope flag data comprises information such as screen resolution that display device can be supported and sweep frequency.
The shortcoming of aforesaid way is, the more and more polynary change of image signal that can support along with display device, the electronics erasable read-only memory that need be embedded in display device also can get more and more, and therefore may cause the too much problem of part number that cost increases or display device is interior.
Summary of the invention
The object of the present invention is to provide a kind of integrated circuit that the expanded scope flag data is provided based on image signal.
The present invention is based on image signal the integrated circuit of expanded scope flag data is provided, be applicable to that one comprises the display of a plurality of image input ports, each image input port is used for receiving multiple image signal that an electronic installation transmits wherein.Should provide the integrated circuit of expanded scope flag data to comprise an expanded scope flag data storage element, a plurality of switch based on image signal, and a switch control unit.
This expanded scope flag data storage element be used for to store many with described image signal expanded scope flag data one to one.
The quantity of described switch is the twice of described image input port quantity, and per two switches are connected with the corresponding image input port corresponding to one of them image input port and by bus.
This switch control unit be used for according to described image input port wherein image signals that receive judge whether this image input port is operating state, the classification of this image signal of identification then.
When this image input port is operating state, this switch control unit will receive the switch conduction that the image input port of this image signal connects according to the classification of this image signal, read with this image signal corresponding expanded scope flag data by this switch from this expanded scope flag data storage element by this image input port for this electronic installation.
Two switches that are connected in same image input port by bus are defined as one first switch and a second switch respectively, when this image input port is operating state, this switch control unit according to the classification of this image signal with this corresponding first switch and the conducting simultaneously of this second switch.
This first switch is used for transmitting by this image input port for this electronic installation the frequency of this image signal, and this second switch is used for transmitting the data of this image signal for this electronic installation by this image input port, makes this electronic installation to read the expanded scope flag data corresponding with this image signal from this expanded scope flag data storage element.
This first switch is connected with this image input port by internal integration circuit bus with this second switch.
This switch control unit comprises signal line insertion detecting module, one signal classification judge module, an and switch handover module, this signal line is inserted detecting module and is used for judging according to a transistor-transistor logic signal of this image signal whether this image input port is operating state, this signal classification judge module is used for the classification according to a ground connection pin and this image signal of supply voltage pin identification of this image input port, the switch conduction that this switch handover module will be connected with this image input port for the classification according to this image signal, this switch is the switch of transmitted in both directions.
Described expanded scope flag data is associated with resolution and the sweep frequency of corresponding image signal.
Beneficial effect of the present invention is: the classification of the image signal that receives by identification and the operating state of judging the image input port, then the corresponding switch of conducting reads required expanded scope flag data for this electronic installation, makes this display only need embedded this integrated circuit just can support the output of multiple image signal.
Description of drawings
Fig. 1 is a system diagram, illustrates to the present invention is based on the preferred embodiment that image signal provides the integrated circuit of expanded scope flag data;
Fig. 2 is a synoptic diagram, and the annexation between this preferred embodiment and the image input port is described;
Fig. 3 is a synoptic diagram, and the annexation of switch control unit and the switch of this preferred embodiment is described.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
Consult Fig. 1, Fig. 2 and Fig. 3, the present invention is based on the preferred embodiment embedded (Embedded) of integrated circuit 1 that image signal provides the expanded scope flag data in a display (not shown) that comprises a plurality of image input ports 4, each image input port 4 is used for receiving multiple image signal that an electronic installation (not shown) transmits wherein.Should provide the integrated circuit 1 of expanded scope flag data to comprise an expanded scope flag data storage element 11, a plurality of switch 12 based on image signal, and a switch control unit 13.This switch control unit 13 comprises signal line insertion detecting module 131, a signal classification judge module 132, and a switch handover module 133.In this preferred embodiment, this display comprises three image input ports 4, be respectively applied to the receiver, video graphic array (Video Graphics Array, VGA), digital visual interface, and three kinds of image signals such as HDMI (High Definition Multimedia Interface).
This expanded scope flag data storage element 11 be used for storing many with described image signal expanded scope flag data one to one.In this preferred embodiment, this expanded scope flag data storage element 11 is an electronics erasable read-only memory.Described expanded scope flag data mode with an imprinting when producing is stored in this expanded scope flag data storage element 11, and described expanded scope flag data comprises related datas such as the screen resolution of the image signal that this display can be supported and sweep frequency.Because the definition of process, screen resolution and the sweep frequency of imprinting is that those skilled in the art can understand easily, therefore do not give unnecessary details at this.
Described switch 12 quantity are twices of image input port 4 quantity, and per two switches 12 are connected with this corresponding image input port 4 corresponding to one of them image input port 4 and by bus 2.In this preferred embodiment, the quantity of image input port 4 is three, the quantity of described switch 12 is six, and has the transmitted in both directions function, and be connected with described image input port 4 by internal integration circuit (I2C) bus 2, two switches that are connected in same image input port 4 by bus 2 are defined as one first switch 121 and a second switch 122 respectively.That is to say that each switch 12 all is connected with an image input port 4 by internal integration circuit bus 2.Because transmission course and the details of internal integration circuit bus 2 are that those skilled in the art can understand easily, so do not give unnecessary details at this.
What deserves to be mentioned is that each image input port 4 can be connected with two switches 12.Wherein a switch 12 is used for for the frequency of this electronic installation by corresponding image input port 4 these image signals of transmission, and another switch 12 is used for for the data of this electronic installation by corresponding image input port 4 these image signals of transmission.
This switch control unit 13 be used for according to described image input port 4 wherein image signals that receive judge whether this image input port 4 is operating state, the classification of this image signal of identification then.What deserves to be mentioned is, the signal line of this switch control unit 13 is inserted detecting module 131, and (Transistor Transistor Logic, TTL) signal judges whether this image input port 4 is operating state for the transistor-transistor logic according to this image signal.The signal classification judge module 132 of this switch control unit 13 is used for the classification of ground connection pin (Ground Pin, figure does not show) and supply voltage pin (VCC Pin, figure does not show) this image signal of identification according to this image input port 4.Wherein operating state represents this image input port 4 and has begun and receive signal constantly.The classification of this image signal comprises above-mentioned Video Graphics Array, digital visual interface, reaches three kinds of image signals such as HDMI (High Definition Multimedia Interface).
When this image input port 4 is operating state, this switch control unit 13 will receive switch 12 conductings that the image input port 4 of this image signal connects according to the classification of this image signal, read with this image signal corresponding expanded scope flag data by switch 12 from this expanded scope flag data storage element 11 by this image input port 4 for this electronic installation.
In this preferred embodiment, switch 12 conductings that the switch handover module 133 of this switch control unit 13 will be connected with this image input port 4 for the classification according to this image signal.That is to say that if the classification of this image signal is digital visual interface, then switch handover module 133 is with two switch 12 conductings of the image input port 4 of corresponding receiving digital video interface image signal.
For instance, suppose two switches 12 of the image input port 41 of corresponding digital video-frequency interface signal, i.e. this first switch 121 and this second switch 122.When this electronic installation transmits the digital video-frequency interface signal to corresponding image input port 41, and after this signal line insertion detecting module 131 judged that these image input ports 41 are operating state, the classification that this signal classification judge module 132 can pick out this image signal was digital visual interface.Then this switch handover module 133 can be to first switch 121 and second switch 122 conductings simultaneously of the image input port 41 that is applied to the receiving digital video interface.
Then, this first switch 121 is for the frequency of this electronic installation by these image input port 41 these image signals of transmission, and this second switch 122 is for the data (see figure 3) of this electronic installation by these image input port 41 these image signals of transmission.
At last, this electronic installation can read the expanded scope flag data corresponding with the digital video-frequency interface signal from this expanded scope flag data storage element 11, for follow-up adjustment screen resolution and sweep frequency reference.
By above explanation as can be known, design of the present invention has following effect:
Classification by the operating state of judging described image input port and the image signal that receives, with with corresponding switch conduction and and then obtain corresponding expanded scope flag data, make display not need again according to the image categorical measure of supporting and embedded a plurality of electronics erasable read-only memory.
Claims (6)
1. one kind provides the integrated circuit of expanded scope flag data based on image signal, is applicable to that one comprises the display of a plurality of image input ports, and each image input port is used for receiving multiple image signal that an electronic installation transmits wherein; It is characterized in that: this integrated circuit comprises: an expanded scope flag data storage element is used for many of storages and described image signal expanded scope flag data one to one; A plurality of switches, the quantity of described switch are the twices of described image input port quantity, and per two switches are connected with the corresponding image input port corresponding to one of them image input port and by bus; And a switch control unit, be used for according to described image input port wherein image signals that receive judge whether this image input port is operating state, the classification of this image signal of identification then; When this image input port is operating state, this switch control unit will receive the switch conduction that the image input port of this image signal connects according to the classification of this image signal, read with this image signal corresponding expanded scope flag data by this switch from this expanded scope flag data storage element by this image input port for this electronic installation.
2. the integrated circuit that the expanded scope flag data is provided based on image signal according to claim 1, it is characterized in that: two switches that are connected in same image input port by bus are defined as one first switch and a second switch respectively, when this image input port is operating state, this switch control unit according to the classification of this image signal with this corresponding first switch and the conducting simultaneously of this second switch.
3. the integrated circuit that the expanded scope flag data is provided based on image signal according to claim 2, it is characterized in that: this first switch is used for transmitting by this image input port for this electronic installation the frequency of this image signal, and this second switch is used for transmitting the data of this image signal for this electronic installation by this image input port, makes this electronic installation to read the expanded scope flag data corresponding with this image signal from this expanded scope flag data storage element.
4. according to claim 3ly provide the integrated circuit of expanded scope flag data based on image signal, it is characterized in that: this first switch is connected with this image input port by internal integration circuit bus with this second switch.
5. the integrated circuit that the expanded scope flag data is provided based on image signal according to claim 1, it is characterized in that: this switch control unit comprises signal line insertion detecting module, one signal classification judge module, an and switch handover module, this signal line is inserted detecting module and is used for judging according to a transistor-transistor logic signal of this image signal whether this image input port is operating state, this signal classification judge module is used for the classification according to a ground connection pin and this image signal of supply voltage pin identification of this image input port, the switch conduction that this switch handover module will be connected with this image input port for the classification according to this image signal, this switch is the switch of transmitted in both directions.
6. according to claim 1ly provide the integrated circuit of expanded scope flag data based on image signal, it is characterized in that: described expanded scope flag data is associated with resolution and the sweep frequency of corresponding image signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100443509A CN103295554A (en) | 2012-02-27 | 2012-02-27 | Integrated circuit capable of providing extension display sign data based on image signals |
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| CN2012100443509A CN103295554A (en) | 2012-02-27 | 2012-02-27 | Integrated circuit capable of providing extension display sign data based on image signals |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108156398A (en) * | 2018-01-03 | 2018-06-12 | 山东超越数控电子股份有限公司 | A kind of VGA Video Graphics Arrays and its method of work |
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| EP1647964A2 (en) * | 2004-10-18 | 2006-04-19 | Genesis Microchip, Inc. | Virtual extended display information data (EDID) in a flat panel controller |
| KR20070040096A (en) * | 2005-10-11 | 2007-04-16 | 주식회사 대우일렉트로닉스 | Edid sharing apparatus of display having multi digital input port |
| CN101257591A (en) * | 2008-03-12 | 2008-09-03 | 四川长虹电器股份有限公司 | Digital multimedia receiving apparatus and extending display identification data reading method thereof |
| KR20090075975A (en) * | 2008-01-07 | 2009-07-13 | 엘지전자 주식회사 | Method for controlling high definition multimedia interface and display unit enabling of the method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1647964A2 (en) * | 2004-10-18 | 2006-04-19 | Genesis Microchip, Inc. | Virtual extended display information data (EDID) in a flat panel controller |
| KR20070040096A (en) * | 2005-10-11 | 2007-04-16 | 주식회사 대우일렉트로닉스 | Edid sharing apparatus of display having multi digital input port |
| KR20090075975A (en) * | 2008-01-07 | 2009-07-13 | 엘지전자 주식회사 | Method for controlling high definition multimedia interface and display unit enabling of the method |
| CN101257591A (en) * | 2008-03-12 | 2008-09-03 | 四川长虹电器股份有限公司 | Digital multimedia receiving apparatus and extending display identification data reading method thereof |
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| CN108156398A (en) * | 2018-01-03 | 2018-06-12 | 山东超越数控电子股份有限公司 | A kind of VGA Video Graphics Arrays and its method of work |
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Application publication date: 20130911 |