TW201322244A - Integrated circuit for providing extended display identification data based on video signal - Google Patents

Abstract

The present invention provides an integrated circuit for providing extended display identification data (EDID) based on a video signal, which comprises an extended display identification data storage unit for storing with a plurality of extended display identification data corresponding to various video signals, a plurality of switches to be respectively connected with one of the multiple video input ports of an electronic device through the bus, and a switch control unit for determining the status of the video input ports and recognizing the type of the video signal. When the video input ports are in an operating status, the switch control unit may turn on the switch connected with the video input ports receiving the video signal based on the type of the video signal, such that the electronic device may read the extended display identification data corresponding to the video signal from the extended display identification data storage unit through the switch with the video input ports.

Description

Integrated circuit for providing extended display flag data based on image signal

The present invention relates to an integrated circuit, and more particularly to an integrated circuit for providing extended display flag data based on an image signal.

In the past, in order to allow electronic devices (for example, computer mainframes) to obtain information such as the range of signals that can be tolerated by the display device (eg, liquid crystal display) to which they are connected, display device manufacturers may embed a plurality of electronically erasable devices in the display device. Electrically-Erasable Programmable Read-Only Memory (EEPROM). Each electronically erasable read-only memory is used to store an Extended Display Identification Data (EDID). Each extended display logo data corresponds to an image signal, such as a Digital Visual Interface (DVI) or a High Definition Multimedia Interface (HDMI). Each extended display flag information includes information such as screen resolution and scanning frequency that the display device can support.

The disadvantage of the above method is that as the image signals supported by the display device become more and more diversified, more and more electronic erasable read-only memory is required to be embedded in the display device, which may result in an increase in cost. Or the problem of too many parts.

Accordingly, it is an object of the present invention to provide an integrated circuit for providing extended display flag data based on video signals.

Therefore, the present invention provides an integrated circuit for providing extended display flag data based on an image signal, and is suitable for a display including a plurality of image input ports, wherein each image input port is configured to receive a plurality of image signals transmitted by an electronic device. One. The integrated circuit for providing extended display flag data based on the image signal comprises an extended display flag data storage unit, a plurality of switches, and a switch control unit.

The extended display mark data storage unit is configured to store extended display mark data in which a plurality of pens are in one-to-one correspondence with the image signals.

The switches are respectively connected by a bus bar and one of the image input ports.

The switch control unit is configured to determine whether the image input port is in an action state according to an image signal received by one of the image input ports, and then identify the type of the image signal.

When the image input device is in an active state, the switch control unit turns on the switch connected to the image input port receiving the image signal according to the type of the image signal, so that the electronic device passes through the switch through the image input The extended display flag data storage unit reads the extended display flag data corresponding to the image signal.

The effect of the present invention is to identify the type of the received image signal and determine the action state of the image input port, and then turn on the corresponding switch for the electronic device to read the required extended display flag data, so that the display only It is necessary to embed the integrated circuit to support the output of most kinds of image signals.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Referring to FIG. 1, FIG. 2 and FIG. 3, a preferred embodiment of the integrated circuit 1 for providing extended display flag data based on an image signal is embedded in a display including a plurality of image inputs (4 (not shown). Each of the image input ports 4 is configured to receive one of a plurality of types of image signals transmitted by an electronic device (not shown). The integrated circuit 1 for providing extended display flag data based on the video signal includes an extended display flag data storage unit 11, a plurality of switches 12, and a switch control unit 13. The switch control unit 13 includes a signal line insertion detection module 131, a signal category determination module 132, and a switch switching module 133. In the preferred embodiment, the display includes three image input ports 4 for receiving three video signals, such as a video graphics array (VGA), a digital video interface, and a high definition multimedia interface.

The extended display flag data storage unit 11 is configured to store extended display flag data corresponding to the plurality of pens in one-to-one correspondence with the image signals. In the preferred embodiment, the extended display indicator data storage unit 11 is an electronically erasable read-only memory. The extended display mark data is stored in the extended display mark data storage unit 11 by means of one-time burning during production, and the extended display mark data includes relevant information such as screen resolution and scanning frequency that the display can support. However, the definition of the process of burning, the resolution of the screen and the frequency of scanning are easily understood by those skilled in the art, and therefore will not be described here.

The switches 12 are connected by one of the bus bars 2 and the image input ports 4, respectively. In the preferred embodiment, the number of the switches 12 is six, and has a bidirectional transmission function, and is connected through the internal integrated circuit (I ² C) bus bar 2 and the image input ports 4, including a first A switch 121 and a second switch 122. That is, each switch 12 is connected to an image input port 4 through the internal integrated circuit 2. However, the transmission process and details of the internal integrated circuit 2 are well understood by those skilled in the art, and therefore will not be described here.

It is worth mentioning that each image input 埠4 will be connected to two switches 12. One of the switches 12 is for the electronic device to transmit the clock of the image signal through the corresponding image input port 4, and the other switch 12 is used for the electronic device to transmit the image through the corresponding image input port 4 Signal information.

The switch control unit 13 is configured to determine whether the image input port 4 is in an operating state according to an image signal received by one of the image input ports 4, and then identify the type of the image signal. It is to be noted that the signal line insertion detecting module 131 of the switch control unit 13 is configured to determine whether the image input port 4 is in an action state according to a Transistor Transistor Logic (TTL) signal of the image signal. . The signal type determining module 132 of the switch control unit 13 is configured to recognize the image signal according to the ground pin (Ground Pin, not shown) of the image input port 4 and the power supply voltage pin (VCC Pin, not shown). category. The action state indicates that the image input 埠4 has started and continuously receives the signal. The types of the image signals include the above-mentioned video graphics array, digital video interface, and high-definition multimedia interface.

When the image input port 4 is in an operating state, the switch control unit 13 turns on the switch 12 connected to the image input port 4 that receives the image signal according to the type of the image signal, so that the electronic device is input by the image. 4, through the switch 12, read the extended display flag data corresponding to the image signal from the extended display flag data storage unit 11.

In the preferred embodiment, the switch switching module 133 of the switch control unit 13 is configured to turn on the switch 12 connected to the image input port 4 according to the type of the image signal. That is, if the type of the video signal is a digital video interface, the switch switching module 133 turns on the two switches 12 corresponding to the image input port 4 of the digital video interface image signal.

For example, assume that the two switches 12 corresponding to the image input port 41 of the digital video interface image signal are the first switch 121 and the second switch 122. When the electronic device transmits the digital video interface image signal to the corresponding image input port 41, and the signal line insertion detecting module 131 determines that the image input port 41 is in an operating state, the signal class determining module 132 recognizes The type of the image signal is a digital video interface. Then, the switch switching module 133 turns on the first switch 121 and the second switch 122 corresponding to the image input port 41 for receiving the digital video interface.

The first switch 121 is used by the electronic device to transmit the clock of the image signal through the image input port 41, and the second switch 122 is used by the electronic device to transmit the data of the image signal by the image input port 41 ( See Figure 3).

Finally, the electronic device can read the extended display flag data corresponding to the digital video interface image signal from the extended display flag data storage unit 11 for subsequent adjustment of the resolution of the screen and the scanning frequency.

In summary, by determining the action state of the image input port and the type of the received image signal, the corresponding switch is turned on and the corresponding extended display flag data is obtained, so that the display does not need to be supported according to the support. The number of image categories is embedded with a plurality of electronically erasable read-only memories, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

1. . . Integrated circuit for providing extended display flag data based on image signal

11. . . Extended display mark data storage unit

12. . . switch

121. . . First switch

122. . . Second switch

13. . . Switch control unit

131. . . Signal line insertion detection module

132. . . Signal category judgment module

133. . . Switching module

2. . . Busbar

4. . . Image input埠

41. . . Image input埠

1 is a system diagram illustrating a preferred embodiment of an integrated circuit for providing extended display flag data based on an image signal according to the present invention;

2 is a schematic view showing the connection relationship between the preferred embodiment and the image input port; and

Figure 3 is a schematic view showing the connection relationship between the switch control unit and the switch of the preferred embodiment.

1. . . Integrated circuit for providing extended display flag data based on image signal

11. . . Extended display mark data storage unit

12. . . switch

13. . . Switch control unit

131. . . Signal line insertion detection module

132. . . Signal category judgment module

133. . . Switching module

Claims (6)

An integrated circuit for providing extended display flag data based on an image signal, which is suitable for a display comprising a plurality of image input ports, wherein each image input port is configured to receive one of a plurality of image signals transmitted by an electronic device, The integrated circuit includes: an extended display flag data storage unit for storing extended pen flag data corresponding to a plurality of pens corresponding to the image signals; and a plurality of switches respectively input by the bus bar and the image images And a switch control unit for determining whether the image input port is in an action state according to an image signal received by one of the image input devices, and then identifying the type of the image signal; wherein when the image input is In the action state, the switch control unit turns on the image switch input and receives the image signal according to the type of the image signal, so that the electronic device transmits the image data from the extended display through the switch through the image input. The storage unit reads the extended display flag data corresponding to the image signal. The integrated circuit for providing extended display flag data based on the image signal according to the first aspect of the patent application, wherein the switches include a first switch and a second switch respectively corresponding to the image input port, when the image input When the switch is in the action state, the switch control unit turns on the first switch and the second switch simultaneously according to the type of the image signal. An integrated circuit for providing extended display flag data based on an image signal according to claim 2, wherein the first switch is used for transmitting, by the electronic device, the clock of the image signal by the image input, and the The second switch is configured to transmit, by the electronic device, the data of the image signal by the image input, so that the electronic device can read the extended display mark data corresponding to the image signal from the extended display mark data storage unit. The integrated circuit for providing extended display flag data according to the image signal of claim 3, wherein the first switch and the second open relationship are connected to the image input port through the internal integrated circuit bus. The integrated circuit for providing extended display flag data based on the image signal according to the first aspect of the patent application, wherein the switch control unit comprises a signal line insertion detection module, a signal category determination module, and a switch switching mode The signal line insertion detecting module is configured to determine whether the image input port is in an operating state according to the transistor electro-crystal logic signal of the image signal, and the signal class determining module is configured to input a ground pin according to the image input port. And the power supply voltage pin identifies the type of the image signal, and the switch switching module is configured to turn on a switch connected to the image input port according to the type of the image signal, wherein the switch is a bidirectional transmission switch. The integrated circuit for providing extended display flag data based on the image signal according to claim 1 of the patent application scope, wherein the extended display flag data is associated with the resolution and scanning frequency of the corresponding image signal.