TWI644252B - Method and electronic device for automatically selecting edid - Google Patents

Abstract

The invention provides a method for automatically selecting an extended display capability identification data and an electronic device thereof. The electronic device includes a motherboard, a display panel, a storage unit, an image processing unit, and a control unit. The storage unit, the image processing unit and the control unit are disposed on the motherboard. The display panel has an identification code and the display panel is configured to receive an image signal. The storage unit is configured to store the plurality of first EDIDs, and the primary EDID of the plurality of first EDIDs corresponds to the identification code of the display panel. The image processing unit performs image processing according to the main extended display capability identification data to generate an image signal. The control unit reads the storage unit according to the identification code to obtain the main EDID corresponding to the identification code via the storage unit, and the control unit stores the main EDID in the image processing unit.

Description

Method for automatically selecting extended display capability identification data and electronic device thereof

The present invention relates to a method of automatically selecting an extended display capability identification material and an electronic device therefor.

In the prior art, the notebook computer and the all-in-one (AIO) computer panel are integrated with the mainframe. Compared with the desktop computer, the notebook computer and the integrated computer are small in size and convenient. The advantages of carrying and saving space, together with the advantages of reducing some of the power lines and transmission lines, notebook computers and integrated computers are favored by consumers in the market.

However, since the notebook computer and the panel of the all in one computer are integrated with the main unit, the user has less opportunity to select the panel and assemble it. Therefore, the manufacturer often directly bases on the manufacture of the notebook computer and the integrated computer. The parameter of the built-in panel is designed to display the image display. When the panel is damaged and must be replaced, the original panel is often discontinued. If the panel is replaced with another panel instead of the original panel, for example, it is replaced with another panel with a newer production version. The original image display setting does not support the parameters of the new panel. As a result, the notebook computer and the all-in-one computer cannot be displayed after the panel is replaced and cannot operate normally.

In view of this, the present invention provides a method for automatically selecting an extended display capability identification material and an electronic device thereof.

In an embodiment, an electronic device that automatically selects an extended display capability identification data (EDID) includes a motherboard, a display panel, a storage unit, an image processing unit, and a control unit. The display panel has an identification code, and the display panel is configured to receive the image signal. The storage unit is disposed on the motherboard for storing the plurality of first extended display capability identification data, and the primary extended display capability identification data in the plurality of first extended display capability identification data corresponds to the identification code of the display panel. The image processing unit is disposed on the motherboard for performing image processing according to the main extended display capability identification data to generate an image signal. The control unit is disposed on the motherboard for reading the storage unit according to the identification code to obtain the main extended display capability identification data corresponding to the identification code via the storage unit, and the control unit stores the main extended display capability identification data in the image processing unit.

In one embodiment, the electronic device further includes a basic input/output system memory including a plurality of second extended display capability identification data. The control unit does not write the second extended display capability identification data from the basic input/output system memory to the storage unit during a booting phase when the storage unit includes at least one first extended display capability identification data.

In an embodiment, the control unit further clears each of the first extended display capability identification data in the storage unit according to a clear flag to determine, when the booting stage, that the storage unit does not include at least one first extended display capability identification data. The second extended display capability identification data is written from the basic input/output system memory to the storage unit.

In an embodiment, the control unit determines whether the storage unit includes the second extended display capability identification data to selectively write the second extended display capability identification data into the storage unit during a booting phase.

In an embodiment, the storage unit includes a preset identification code, and the control unit determines whether the identification code of the display panel and the preset identification code are the same in a booting stage to generate a determination result, and the control unit selectively selects the result according to the determination result. The preset identification code is updated to the identification code of the display panel, and the storage unit is selectively read by the identification code of the display panel, and the main extended display capability identification data is selectively stored in the image processing unit.

In an embodiment, a method for automatically selecting an extended display capability identification data includes reading, by the control unit, a storage unit according to an identification code of the display panel to obtain a plurality of first extended display capability identification data in the storage unit corresponding to the foregoing One of the identification codes mainly extends the display capability identification data, stores the main extended display capability identification data in an image processing unit via the control unit, performs image processing according to the main extended display capability identification data via the image processing unit to generate an image signal, and The display panel displays the image based on the image signal.

In an embodiment, the method for automatically selecting the extended display capability identification data further includes determining, by the control unit, whether the storage unit includes at least one first extended display capability identification data, and when the storage unit includes at least one first When the display capability identification data is extended, the second extended display capability identification data in a basic input/output system memory is not written into the storage unit by the control unit during the booting phase.

In an embodiment, the foregoing method for automatically selecting the extended display capability identification data further includes: clearing, by the control unit, each of the first extended display capability identification materials in the storage unit, and when the storage unit does not include the at least one first extended display capability; When the data is identified, the second extended display capability identification data is written into the storage unit during the booting phase via the control unit.

In an embodiment, the method for automatically selecting the extended display capability identification data includes: determining, by the control unit, whether the storage unit includes a plurality of second extended display capability identification data in a basic input/output system memory to generate a booting stage. And determining, by the control unit, the second extended display capability identification data is selectively written into the storage unit at the booting stage according to the determination result.

In an embodiment, the method for automatically selecting the extended display capability identification data further includes: determining, by the control unit, whether the preset identification code in the storage unit is identical to the identification code of the display panel to generate a determination result, And updating, by the control unit, the preset identification code to the identification code of the display panel according to the determination result; wherein, in the step of reading the storage unit and storing the main extended display capability identification data in the image processing unit, the control unit is configured according to the step of: The determination result selectively reads the storage unit according to the identification code of the display panel, and the control unit selectively stores the main extended display capability identification data in the image processing unit according to the determination result.

In summary, according to an embodiment of the method for automatically selecting an extended display capability identification data and an electronic device thereof, the storage unit stores a plurality of extended display capability identification data, and after the user replaces the display panel, the control unit The corresponding EDID in the storage unit can be read according to the identification code of the display panel, so that the image processing unit generates the image signal according to the identification code, so that the replaced display panel performs image display and operates normally.

1 is a functional block diagram of an embodiment of an electronic device for automatically selecting an extended display capability identification material in accordance with the present invention. 2 is a flow chart of one embodiment of a method for automatically selecting an extended display capability identification material in accordance with the present invention. Referring to FIG. 1 and FIG. 2 together, the electronic device 1 includes a display panel 11 , a storage unit 12 , an image processing unit 13 , a control unit 14 , and a motherboard 15 . The storage unit 12, the image processing unit 13, and the control unit 14 are disposed on the motherboard 15. The control unit 14 is coupled to the display panel 11, the storage unit 12, and the image processing unit 13, respectively. In an embodiment, the electronic device 1 can be an all-in-one computer, a notebook computer, or a point of sale (POS) terminal device.

The storage unit 12 is configured to store a plurality of first extended display capability identification data (EDID), and the image processing unit 13 may perform image processing according to one of the plurality of first EDIDs. In detail, the display panel 11 has an identification code, and the identification code of the display panel 11 corresponds to the main EDID. The control unit 14 receives the identification code from the display panel 11, and the control unit 14 reads the storage unit 12 based on the identification code of the display panel 11, and acquires the main EDID corresponding to the identification code of the display panel 11 via the storage unit 12 (step S01). . Next, the control unit 14 stores the main EDID in the image processing unit 13 (step S02), and the image processing unit 13 performs image processing based on the main EDID, and generates an image signal accordingly (step S03). Finally, the display panel 11 receives the image signal and performs image display based on the image signal (step S04).

Accordingly, when the display panel 11 is damaged, the user can replace the display panel 11 with other panels corresponding to any of the first EDIDs according to the first EDID. After the user replaces the display panel 11 , the control unit 14 reads the storage unit 12 according to the identifier of the replaced display panel 11 to obtain one of the first EDIDs in the storage unit 12 as corresponding to the replaced display panel 11 . The main EDID of the identification code, the image processing unit 13 generates an image signal according to the main EDID corresponding to the identification code of the replaced display panel 11, so that the replaced display panel 11 operates normally.

In an embodiment, the control unit 14 can read the storage unit 12 according to the identification code of the display panel 11 according to the identification code of the display panel 11 when the step S01 is executed, and the control unit 14 sends the foregoing address to the storage. The unit 12 obtains, by the foregoing address, the main EDID of the plurality of first EDIDs corresponding to the identification code of the current display panel 11. In practice, the correspondence between the identification code of the display panel 11 and the address sent by the control unit 14 to the storage unit 12 may be pre-stored, for example, by using a look-up table to record the foregoing correspondence. In other words, the identification code that can be recorded as "3" in the lookup table corresponds to the address of "0x02" (hexadecimal notation); after the control unit 14 receives the identification code of the display panel 11, for example, the identification code is " 3), the control unit 14 obtains the address corresponding to the identification code according to the correspondence recorded in the lookup table, that is, "0x02".

In practice, the storage unit 12 and the memory 131 may be a non-volatile read only memory (ROM), for example, an electronic erasable rewritable read only memory (EEPROM), in the storage unit 12 The primary EDID in the plurality of first EDIDs and the memory 131 does not disappear as the power of the electronic device 1 is turned off. Furthermore, the image signal is a low voltage differential signal, and the display panel 11 is connected to the image processing unit 13 by a Low-Voltage Differential Signaling (LVDS) transmission line. Moreover, the display panel 11 is also connected to the control unit 14 by an LVDS transmission line, and the identification code of the display panel 11 is generated by the LVDS transmission line. In detail, the identification code may be composed of a plurality of bits represented by binary bits, each of which is transmitted by one of the transmission lines of the LVDS transmission line. For example, taking the identification code as a four-bit as an example, the control unit 14 obtains the potential state of four of the plurality of PIN pins of the display panel through the LVDS transmission line corresponding to the display panel 11 (for example, pulling up (pull up) A combination of high) or pull low is used as the identification code. Therefore, the identification code has sixteen combinations, and the identification code can be transmitted by four transmission lines in the LVDS transmission line, according to the logic level of the signal transmitted by the four transmission lines. The combination control unit 14 can obtain the identification code of the display panel 11 that is electrically connected to the motherboard 15 at present, so the number of the first EDID can be sixteen. Further, the control unit 14 can be connected to the image processing unit 13 and the storage unit 12 by the system management bus (SMBUS), and the control unit 14 reads the data stored in the storage unit 12 through the system bus bar, and obtains the corresponding display panel. The main EDID of the identification code of 11 and the control unit 14 transmits the primary EDID to the image processing unit 13 through the system bus.

In an embodiment, the first EDID in the storage unit 12 can be from a BIOS memory 16. As shown in FIG. 1 , the electronic device 1 further includes a BIOS memory 16 coupled to the control unit 14 . The BIOS memory 16 stores a BIOS code, and the BIOS code includes a plurality of second EDIDs. Here, the control unit 14 may be a central processing unit (CPU), and the control unit 14 may execute a BIOS code after the power of the electronic device 1 is started to execute a booting process, and execute a plurality of second EDIDs from the BIOS during a booting phase of the booting process. The memory 16 is written to the storage unit 12 such that the storage unit 12 includes a plurality of first EDIDs corresponding to the second EDID. However, in order to speed up the booting of the electronic device 1, in the booting phase, the control unit 14 may decide whether to write the second EDID from the BIOS memory 16 to the storage unit 12 according to whether the storage unit 12 already includes at least one first EDID.

3 is a flow chart of an embodiment of a method for automatically selecting an extended display capability identification material in accordance with the present invention. Referring to FIG. 1 and FIG. 3 together, before performing step S01, the control unit 14 determines whether the storage unit 12 includes at least one first EDID (step S05) to selectively write the second EDID into the storage unit 12 during the booting phase. When the storage unit 12 does not include at least one first EDID (the determination result of the control unit 14 is "NO"), the control unit 14 writes the second EDID from the BIOS memory 16 to the storage unit 12 during the booting phase (step S06). The storage unit 12 is configured to include the first EDID; on the other hand, when the storage unit 12 includes at least one first EDID (the determination result of the control unit 14 is YES), the storage unit 12 executes step S01 without the BIOS memory 16 The second EDID is written to the storage unit 12. In this case, when the manufacturer of the electronic device 1 does not store the EDID in the storage unit 12 before the electronic device 1 is shipped from the factory, the control unit 14 determines that the storage unit 12 does not include the first time when the electronic device 1 is powered on for the first time. The second EDID is written from the BIOS memory 16 to the storage unit 12 by an EDID, so that the storage unit 12 includes a plurality of first EDIDs. Moreover, since the first EDID does not disappear with the power off, the control unit 12 determines that the storage unit 12 includes the first EDID when the electronic device 1 performs the second booting, and the control unit 12 does not store the second EDID from the BIOS. The body 16 is written to the storage unit to increase the booting speed of the electronic device 1. On the other hand, if the manufacturer of the electronic device 1 has stored the EDID in the storage unit 12 before the electronic device 1 is shipped from the factory, the control unit 14 does not input the basic input and output into the system memory during the startup phase. At least one second EDID is written to the storage unit 12 to increase the booting speed of the electronic device 1.

Further, in this implementation manner, the control unit 14 may clear the first EDID in the storage unit 12 according to a clear flag. When the user wants to update the first EDID by using the BIOS code, the user may modify The set value of the flag is cleared, and the control unit 14 clears the EDID in the storage unit 12. Therefore, in the booting phase, since the storage unit 12 does not include the first EDID, the determination result of the control unit 14 is "NO", and the control unit 14 performs step S06 to write the updated second EDID from the BIOS memory 16 to the storage. Unit 12 updates the first EDID.

4 is a flow chart showing another embodiment of a method for automatically selecting an extended display capability identification material in accordance with the present invention. Please refer to FIG. 1 and FIG. 4 together. In another embodiment, when the display panel 11 is replaced due to damage and the replaced display panel 11 does not support the first EDID in the storage unit 12, that is, when the identification code of the replaced display panel 11 is When the first EDID is not associated with the storage unit, the user can add the EDID corresponding to the identifier of the replaced display panel 11 to the BIOS code to update the BIOS code, and after the power is turned on by the control unit 14 And executing the updated BIOS code to write the updated second EDID to the storage unit 12 to update the first EDID. However, when the display panel 11 is not replaced, since the second EDID is not updated and is identical to the first EDID, the control unit 14 may determine that the second EDID is the same as the first EDID and select not to use the second EDID from the BIOS memory 16 Write to storage unit 12. As shown in FIG. 4, before performing step S01, the control unit 14 determines, in the booting phase, whether the storage unit 12 includes each second EDID in the BIOS memory 16 (step S07) to selectively select the booting phase. The second EDID is written to the storage unit 12. In detail, when the determination result of the control unit 14 is "No", it indicates that the second EDID is not the same as the first EDID due to the user update, and the control unit 14 may only between the second EDID and the first EDID. The difference is written to the storage unit 12 (step S08) to update the first EDID; when the determination result of the control unit 14 is YES, it indicates that the second EDID is not updated and is the same as the first EDID, and the control unit at this time Step 14 is performed without writing the second EDID to the storage unit 12.

In another implementation manner, after the step S07 is performed, when the determination result of the control unit 14 is "No", the control unit 14 may also write each second EDID from the BIOS memory 16 to the storage unit 12 (step S08), and covering the old data in the storage unit 12.

In an embodiment, in order to reduce the number of reading and writing of the storage unit 12 and the memory 131, the storage unit 12 further stores a preset identification code, and the control unit 14 compares the identification code and the preset identification code of the display panel 11 during the booting phase. Whether the same is the same and a determination result is generated, the control unit 14 selectively updates the preset identification code to the identification code of the display panel 11 according to the determination result, and selectively performs the reading action and the writing on the storage unit 12 and the memory 131 respectively. Into the action. In detail, when the preset identification code is the same as the identification code of the display panel 11, the control unit 14 does not perform step S01 and step S02, and the control unit 14 does not read the storage unit 12 according to the identification code of the display panel 11, and the control unit 14 does not write the main EDID into the memory 131, and the display panel 11 does not update the preset identification code to the identification code of the display panel 11; on the other hand, when the preset identification code is different from the identification code of the display panel 11, The control unit 14 first performs steps S01 and S02 to perform reading and writing operations on the storage unit 12 and the memory 131, respectively, and updates the preset identification code to the identification code of the display panel 11.

Here, when the electronic device 1 is turned on for the first time, since the control unit 14 never writes the identification code of the display panel 11 to the storage unit 12, the control unit 14 determines the preset identification before reading the storage unit 12 for the first time. The code is different from the identification code of the display panel 11. At this time, the control unit 14 reads the storage unit 12 according to the identification code of the display panel 11 of the current coupling control unit 14 to obtain the display panel 11 corresponding to the lower coupling control unit 14. The main EDID of the identification code, the control unit 14 further writes the obtained main EDID into the memory 131, and writes the identification code of the display panel 11 of the current coupling control unit 14 to the storage unit 12 to update the preset identification. code. If the user never replaces the display panel 11, the control unit 14 determines that the preset identification code is the same as the identification code of the display panel 11 of the current coupling control unit 14 in each startup phase after the first power-on, the control unit 14 The reading operation and the writing operation of the storage unit 12 and the memory 131 are not performed, and the number of reading and writing of the storage unit 12 and the memory 131 is reduced, thereby increasing the service life of the storage unit 12 and the memory 131.

In summary, according to an embodiment of the method for automatically selecting an extended display capability identification data and an electronic device thereof, the storage unit stores a plurality of extended display capability identification data, and after the user replaces the display panel, the control unit The corresponding EDID in the storage unit can be read according to the identification code of the display panel, so that the image processing unit generates the image signal according to the identification code, so that the replaced display panel performs image display and operates normally.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any person having ordinary knowledge in the technical field can make some changes and refinements without departing from the spirit and scope of the present case. This is subject to the definition of the scope of the patent application.

1‧‧‧Electronic device

11‧‧‧ display panel

12‧‧‧ storage unit

13‧‧‧Image Processing Unit

131‧‧‧ memory

14‧‧‧Control unit

15‧‧‧ motherboard

16‧‧‧BIOS memory

S01-S08‧‧‧Steps

[Fig. 1] is a functional block diagram of an embodiment of an electronic device for automatically selecting an extended display capability identification material according to the present invention. [Fig. 2] is a flow chart showing an embodiment of a method of automatically selecting an extended display capability identification material according to the present invention. [Fig. 3] is a flow chart showing an embodiment of a method of automatically selecting an extended display capability identification material according to the present invention. [Fig. 4] is a flow chart showing another embodiment of a method of automatically selecting an extended display capability identification material according to the present invention.

Claims (10)

An electronic device for automatically selecting an extended display capability identification data, comprising: a motherboard; a display panel having an identification code, the display panel for receiving an image signal; and a storage unit disposed on the motherboard for storing a plurality of first extended display capability identification data, wherein one of the first extended display capability identification data corresponds to the identification code; an image processing unit is disposed on the motherboard for the main extension Displaying the capability identification data for image processing to generate the image signal; and a control unit disposed on the motherboard for reading the storage unit according to the identification code to obtain the main body corresponding to the identification code via the storage unit The display capability identification data is extended, and the control unit stores the main extended display capability identification data in the image processing unit. The electronic device of claim 1, further comprising: a basic input/output system memory, comprising a plurality of second extended display capability identification data; wherein the control unit includes at least one of the first extended display capability identifications in the storage unit The second extended display capability identification data is not written into the storage unit from the basic input/output system memory during a booting phase. The electronic device of claim 2, wherein the control unit further clears each of the first extended display capability identification data in the storage unit according to a clearing flag to determine that the storage unit does not include at least The second extended display capability identification data is written from the basic input/output system memory to the storage unit when the first extended display capability identification data. The electronic device of claim 1, further comprising: a basic input/output system memory, comprising a plurality of second extended display capability identification data; wherein the control unit determines whether the storage unit includes the second The display capability identification data is extended to selectively write the second extended display capability identification data to the storage unit. The electronic device of claim 1, wherein the storage unit includes a preset identification code, and the control unit determines whether the identification code of the display panel is identical to the preset identification code to generate a determination result. The control unit selectively updates the preset identification code to the identification code of the display panel according to the determination result, and selectively reads the storage unit with the identification code of the display panel, and selectively The main extended display capability identification data is stored in the image processing unit. A method for automatically selecting an extended display capability identification data, comprising: reading, by a control unit, a storage unit according to an identification code of a display panel to obtain a plurality of first extended display capability identification data in the storage unit corresponding to the identification One of the code main extension display capability identification data; the main extended display capability identification data is stored in an image processing unit via the control unit; and the image processing unit performs image processing according to the main extended display capability identification data to generate an image signal And displaying the image according to the image signal via the display panel. The method for automatically selecting the extended display capability identification data as described in claim 6, further comprising: determining, by the control unit, whether the storage unit includes at least one of the first extended display capability identification data during a booting phase; and when the storage unit When the at least one first extended display capability identification data is included, the second extended display capability identification data in a basic input/output system memory is not written into the storage unit by the control unit during the booting phase. The method for automatically selecting an extended display capability identification data, as described in claim 7, further comprising: clearing, by the control unit, each of the first extended display capability identification data in the storage unit; and when the storage unit does not include at least one When the first extended display capability identifies the data, the second extended display capability identification data is written into the storage unit at the booting stage via the control unit. The method for automatically selecting the extended display capability identification data according to claim 6, further comprising: determining, by the control unit, whether the storage unit includes a plurality of second extended display capability identifiers in a basic input/output system memory The data is used to generate a determination result; and the second extended display capability identification data is selectively written into the storage unit at the booting stage according to the determination result via the control unit. The method for automatically selecting the extended display capability identification data as described in claim 6, further comprising: determining, by the control unit, whether a preset identification code in the storage unit is identical to the identification code of the display panel in a booting phase And generating, by the control unit, the preset identification code to update the identification code of the display panel according to the determination result; wherein, the reading the storage unit and the main extended display capability identification data In the step of storing the image processing unit, the control unit selectively reads the storage unit according to the identification code of the display panel according to the determination result, and the control unit selectively displays the main extended display according to the determination result. The capability identification data is stored in the image processing unit.