TWI627582B - Display apparatus and extended display identification data (edid) replacing method thereof - Google Patents

Abstract

A display device is configured to receive a display signal of a display signal providing device, including a first storage unit and a display wafer. The first storage unit stores first extended display capability identification information including a plurality of first preset parameters. The display chip includes a control unit, and the control unit provides at least one second preset parameter according to the control signal to replace a portion of the first preset parameter in the first extended display capability identification information and further generate the second extended display capability identification information. The display chip sends a notification signal to the display signal providing device to read the second extended display capability identification information according to the second extended display capability identification information, and then the display signal providing device provides a display signal compatible with the second extended display capability identification information. Display the wafer.

Description

Display device and its extended display capability identification information replacement method

The present invention relates to a display device, and more particularly to an extended display capability identification information replacement method for a display device.

The extended display capability identification information is an internal storage component stored in the display and is used to describe various parameters of the display capability of the display. Generally, it includes basic information such as manufacturer information, serial number, clock, resolution, and display parameters of the display. When a signal source such as a host computer or a game console is connected to the display, the extended display capability identification information is first read to prevent the output display signal from exceeding its display capability. However, for different signal sources, such as different hosts or different display cards, a single extended display capability identification information cannot meet the display requirements of different signal sources, so it is necessary to think about how to handle the extended display capability identification information. Make it meet the needs of the corresponding signal source.

The present invention provides a display device that is different from that mentioned in the prior art.

The present invention further provides an extended display capability identification information replacement method suitable for the above display device.

The display device of the present invention is adapted to receive a display signal provided by a display signal providing device, and the display device comprises a first storage unit and an explicit chip. The first storage unit is configured to store first extended display capability identification information including a plurality of first preset parameters. The display wafer described above includes a control unit. The control unit is configured to provide at least one second preset parameter according to the control signal to replace part of the first preset parameter of the first extended display capability identification information and further generate the second extended display capability identification information. The display chip sends a notification signal to notify the display signal providing device to read the second extended display capability identification information according to the second extended display capability identification information, and the display signal providing device provides the phase after reading the second extended display capability identification information. The display signal for the second extension display capability identification information is given to the display chip.

The invention further provides an extended display capability identification information replacement method, which is suitable for the above display device. The method includes: reading a first extended display capability identification information including a plurality of first preset parameters; and causing the control unit to provide at least one second preset parameter to replace a portion of the first extended display capability identification information according to the control signal The first preset parameter further generates second extended display capability identification information; and sends a notification signal to notify the display signal providing device to read the second extended display capability identification information. The display signal providing device provides a display signal compatible with the second extended display capability identification information to the display device after reading the second extended display capability identification information.

The display device of the present invention provides a second preset parameter to replace a portion of the first preset parameter in the first extended display capability identification information by using the control unit, and therefore only needs to be modified according to the requirement of the display signal providing device. Part of the first preset parameter, without having to replace all of the first preset parameters, enables the display device to have display capability corresponding to the display signal providing device.

100, 400‧‧‧ display devices

200‧‧‧Display signal providing device

101, 401, 402‧‧‧ storage unit

102‧‧‧Control unit

104‧‧‧ display chip

105‧‧‧Detection unit

106‧‧‧User interface

CS‧‧‧Control signal

HDMI‧‧‧High Quality Multimedia Interface

IS‧‧‧ display signal

Hot-plug‧‧‧hot swap

SDA/SCL‧‧‧ data line/clock line

DP‧‧‧ digital video interface

AUX‧‧‧ auxiliary channel

S501~S503‧‧‧Steps

1 is a block diagram of a display device in accordance with an embodiment of the present invention.

2 is a block diagram of a display device according to another embodiment of the present invention.

3 is a block diagram of a display device according to still another embodiment of the present invention.

4 is a block diagram of a display device in accordance with still another embodiment of the present invention.

FIG. 5 is a flowchart of a method for replacing extended display capability identification information according to an embodiment of the present invention.

1 is a block diagram of a display device in accordance with an embodiment of the present invention. As shown in FIG. 1 , the display device 100 and the display signal providing device 200 enable the display signal providing device 200 to read Extended Display Identification Data (EDID) from the display device 100 and provide display signals to the display device 100. . The display device 100 is, for example, an LCD or an LED display, and the display signal providing device 200 is, for example, a computer host or a game console. The display device 100 includes a storage unit 101 and a display wafer 104. The storage unit 101 is configured to store first extended display capability identification information including a plurality of first preset parameters.

In the above embodiment, the display signal providing apparatus 200 can include two display cards (not shown) having different functions, each of which has different graphics processing capabilities. For example, one of the display cards has the ability to support 3D video signal processing, for example, and the other display card. For example, with the ability to support intelligent Sync, the display signal providing device 200 can use different display cards to send different display signals to the display device 100 in response to different display requirements. Correspondingly, the display device 100 must provide corresponding extended display capability identification information to the display signal providing device 200 to notify it to start providing the corresponding display signal. Specifically, the display signal providing device 200 reads the first extended display capability identification information in the display device 100 when the device is turned on, and transmits a general display signal. Then, when the display signal providing device 200 enables different display cards to implement a special display function (for example, enabling 3D or Adaptive Sync), the display signal is correspondingly changed, and the display device 100 can automatically detect the auxiliary in the display signal. The information is used to determine whether the current first extended display display capability identification information needs to be converted, so that the display device 100 can be developed corresponding to the special needs of the display signal providing device 200. Of course, the user can also manually set the extended display capability identification information of the display device 100 so that the imaging capability meets the special requirements of the display signal providing device 200, which will be described in more detail below.

Referring to FIG. 1 , the display chip 104 in the display device 100 receives and processes the display signal provided by the display signal providing device 200 , and includes the control unit 102 . The control unit 102 is configured to provide at least one second preset parameter according to the control signal to replace part of the first preset parameter of the first extended display capability identification information and further generate the second extended display capability identification information. In other words, the control unit 102 is configured to convert the first extended display capability identification information into the second extended display capability identification information in response to the received control signal. Then, the display chip 104 sends a notification signal in response to the second extended display capability identification information to notify the display signal providing device 200 to read the second extended display capability identification information, and the display signal providing device 200 reads the first After the extended display capability identification information, a display signal compatible with the second extended display capability identification information is provided to the display chip 104. In addition, the control unit 102 may also provide a third preset parameter to replace part of the first preset parameter in the first extended display capability identification information and further generate the third extended display capability identification information, so as to respond to more than two types of displays. Features.

2 is a block diagram of a display device according to another embodiment of the present invention. The same reference numerals in Fig. 2 and Fig. 1 denote the same elements or signals. As shown in FIG. 2 , the difference from FIG. 1 is that the control unit 102 includes a detecting unit 105 for detecting auxiliary information (for example, InfoFrame) in the display signal IS provided by the display signal providing device 200. And determining whether to send the control signal CS to the control unit 102 based on the auxiliary information. In this embodiment, the display device 100 and the display signal providing device 200 are electrically connected via a high-quality multimedia interface HDMI, and the display signal providing device 200 is connected to the data line SDA in the high-quality multimedia interface. The SCL reads the first extended display capability identification information and the second extended display capability identification information. In particular, the display device 100 supports the hot plug hot-plug and is electrically connected to the display signal providing device 200. Therefore, after the control unit 102 successfully replaces some of the first preset parameters with the second preset parameter, The notification signal can be immediately sent to the display signal providing device 200 to re-read the second extended display capability identification information. In this embodiment, the storage unit 101 is implemented by using non-volatile memory, such as Programmable Read Only Memory (PROM) or electronically erasable rewritable read-only memory ( Electrically Erasable Programmable Read Only Memory (EEPROM) is implemented. The above is only an example, and the present invention is not limited thereto.

3 is a block diagram of a display device according to still another embodiment of the present invention. The same reference numerals in Fig. 3 and Fig. 2 denote the same elements or signals. As shown in FIG. 3, the difference from FIG. 2 is that the display device 100 does not use the detecting unit 105 but uses the user interface 106 for the user to optionally send the corresponding control signal CS to the control unit 102. It provides a corresponding second preset parameter to replace a portion of the first preset parameter. In this embodiment, the user interface 106 can provide special options for the user to operate. For example, the user interface 106 has a 3D or Adaptive Sync menu, and the first and second extended display capability identification information respectively correspond to the 3D and Adaptive Sync display functions. When the storage unit 101 stores the first extended display capability identification information, the user desires Switching to the Adaptive Sync display function, at this time, selecting Adaptive Sync in the user interface 106, the control unit 102 provides at least one second preset parameter to replace the first extended display capability identification according to the control signal CS (generated by the user interface 106). The first preset parameter of the information further generates the second extended display capability identification information; when the storage unit 101 stores the second extended display capability identification information, the user wants to switch to the 3D display function, and at the user interface 106 Selecting 3D, the control unit 102 provides at least one first preset parameter according to the control signal CS (generated by the user interface 106) to replace part of the second preset parameter among the second extended display capability identification information and further generate the first extension Display capability identification information.

In an additional application of the present invention, when the user is an elderly person, the user interface 106 can provide a resolution adjustment menu to provide the user with a display function such as a low-resolution display function, thereby displaying a larger display in the old-use mode. The graphics and text make the seniors have a better viewing experience. In other words, the older user can select the old-person usage mode (low-resolution imaging function) through the resolution adjustment menu provided by the user interface 106, and the user interface 106 sends the corresponding control signal CS to the control unit. 102 to make it available Corresponding the second preset parameter, the first preset parameter of the replacement part, the second extended display capability identification information generated after the conversion includes the low-resolution display capability information, and then the display chip 104 sends a notification signal to notify the display. The signal providing device 200 reads the second extended display capability identification information. After reading the second extended display capability identification information, the display signal providing device 200 provides the low-resolution display signal IS to the display device 100. In other words, the user does not need to change the resolution of the display screen by setting the display signal providing device 200 as usual.

4 is a block diagram of a display device in accordance with still another embodiment of the present invention. The same reference numerals in Fig. 4 and Fig. 2 denote the same elements or signals. As shown in FIG. 4 , the difference between FIG. 2 and FIG. 2 is that the display device 400 and the display signal providing device 200 are electrically connected via a digital video interface DP (DisplayPort), and the display signal providing device 200 is connected through the digital video interface. The auxiliary channel AUX reads the first extended display capability identification information and the second extended display capability identification information. In addition, the control unit 102 is configured to store, by the storage unit 401, the first extended display capability identification information, which is stored by the storage unit 401, and includes a plurality of first preset parameters to the storage unit 402. The control unit 102 is configured according to the control signal. The CS provides a second preset parameter to replace a portion of the first preset parameter stored in the storage unit 402 and further generates a second extended display capability identification information. The display signal providing device 200 is connected to the auxiliary channel AUX in the digital video interface DP. The first extended display capability identification information and the second extended display capability identification information stored in the storage unit 402 are read.

In the above embodiment, the storage unit 401 is implemented by a non-volatile memory, such as a Programmable Read Only Memory (PROM) or an electronically erasable rewritable read-only memory. Electrically Erasable Programmable Read Only Memory (EEPROM) is implemented, and the storage unit 402 is implemented by volatile memory, for example, by using a dynamic random access memory (DRAM). In addition, in this embodiment, the detecting unit 105 is used to provide the control signal CS to enable the control unit 102 to provide the second preset parameter replacement portion of the first preset parameter. However, the user interface may be used as described above to allow The user sends the corresponding control signal CS to the control unit 102 in a manual manner, and details are not described herein. In the present embodiment, although the storage unit 402 is disposed in the display wafer 104, the present invention is not limited thereto, and the storage unit 402 may be disposed outside the display wafer 104.

FIG. 5 is a flowchart of a method for replacing an extended display capability identification information according to an embodiment of the present invention. The method is applicable to a display device and a display information providing device. The display device has a first storage unit and a control unit, and the first storage The unit is configured to store first extended display capability identification information including a plurality of first preset parameters, and the method includes steps S501 to S503. Step S501: Read first extended display capability identification information including a plurality of first preset parameters. Step S502: The control unit is configured to provide at least one second preset parameter according to the control signal to replace part of the first preset parameter in the first extended display capability identification information and further generate second extended display capability identification information. Step S503: Send a notification signal to notify the display signal providing device to read the second extended display capability identification information. The display signal providing device provides a display signal compatible with the second extended display capability identification information to the display device after reading the second extended display capability identification information.

In summary, the present invention replaces part of the first preset parameter by using the second preset parameter provided by the control unit, to convert the first extended display capability identification information into the second extended display capability identification information, and notifies the display. The signal providing device reads the second extended display capability identification information, and displays the signal After the reading, the display unit provides a display signal corresponding to the second extended display capability identification information to the display device, so that the display device displays the image in a manner consistent with the display signal.

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

Claims (11)

A display device is configured to receive a display signal provided by a display signal providing device, the display device comprising: a first storage unit, configured to store a first extended display capability identification information including a plurality of first preset parameters; And a display unit, comprising: a control unit, configured to provide at least one second preset parameter according to a control signal to replace part of the first preset parameter of the first extended display capability identification information and further generate a The second extension display capability identification information; wherein the display chip sends a notification signal to notify the display signal providing device to read the second extended display capability identification information according to the second extended display capability identification information, the display signal providing device After reading the second extended display capability identification information, a first display signal compatible with the second extended display capability identification information is provided to the display chip. The display device of claim 1, wherein the display chip further comprises a detecting unit, wherein the detecting unit is configured to detect an auxiliary information of a second display signal provided by the display signal providing device And determining, according to the auxiliary information, whether to send the control signal to the control unit. The display device of claim 1, further comprising a user interface for a user to optionally send a corresponding control signal to the control unit to provide a corresponding second preset parameter to replace the part A preset parameter. The display device of claim 3, wherein the user interface provides a resolution adjustment menu for the user to input the control signal via the resolution adjustment menu to provide the second preset parameter to replace the The first extended display capability identifies a portion of the first preset parameter and further generates the second extended display capability identification information, where the second preset parameter corresponds to one The display information is sent by the display chip to notify the display signal providing device to read the second extended display capability identification information according to the second extended display capability identification information, and the display signal providing device is reading the second After extending the display capability identification information, the first display signal compatible with the resolution information is provided to the display chip. The display device of claim 4, wherein the resolution information is used to notify the display signal providing device to reduce the resolution of the first display signal to increase the size of an image displayed by the display device. The display device of claim 1, wherein the display device and the display signal providing device are electrically connected via a high-quality multimedia interface, and the display signal providing device is connected to the high-quality multimedia device. The first extended display capability identification information and the second extended display capability identification information are read by a data line and a clock line in the interface. The display device of claim 1, wherein the display device and the display signal providing device are electrically connected via a digital video interface, and the display signal providing device is connected to one of the digital video interfaces. The auxiliary channel reads the first extended display capability identification information and the second extended display capability identification information. The display device of claim 7, further comprising a second storage unit, wherein the control unit is configured to identify the first extended display capability of the second storage unit that includes the plurality of first preset parameters The information is stored in the first storage unit, and the control unit provides the second preset parameter according to the control signal to replace a portion of the first preset parameter stored in the first storage unit and further generate the second extended display. The capability identification information, the display signal providing device reads the first extended display capability identification information and the first stored in the first storage unit via the auxiliary channel in the digital video interface Second, the extended display capability identification information. An extended display capability identification information replacement method is applicable to a display device and a display signal providing device. The display device has a first storage unit and a control unit, and the first storage unit is configured to store a plurality of The first extended display capability identification information of the preset parameter, the method includes: reading the first extended display capability identification information including the plurality of first preset parameters; and providing the control unit with at least one according to a control signal The second preset parameter is used to replace part of the first preset parameter in the first extended display capability identification information and further generate a second extended display capability identification information; and send a notification signal to notify the display signal providing device to read the first The second display display capability identification information is provided, wherein the display signal providing device provides a first display signal compatible with the second extended display capability identification information to the display device after reading the second extended display capability identification information. The method of claim 1, wherein the display device further comprises a detecting unit, wherein the detecting unit is configured to detect a second display signal provided by the display signal providing device And an auxiliary information, and determining whether to send the control signal to the control unit according to the auxiliary information. The extended display capability identification information replacement method according to claim 9, wherein the display device further includes a user interface for a user to optionally send a corresponding control signal to the control unit to provide a corresponding The second preset parameter replaces the first preset parameter of the part.