Chipset and related method of processing graphic signals

1. Field of Invention

The present invention relates to a chipset and a related method, and more particularly to a chipset and a related method for controlling an external graphic module and an internal graphic module to transmit or receive signals simultaneously.

2. Related Art

For early computer system, chipset, for example, a north bridge (NB) device, is an important component for processing signals transmitted between central processing unit (CPU) and electronic devices such as memory, graphic card and peripheral device. Accompanying with the progressive multimedia technology, the interaction between a graphic memory device and a computer has been advanced. However, a computer not always equips an independent graphic card, in recent years a graphic chip is integrated in a computer chipset in some cases, for example, making a chipset have a graphic function by integrating a graphic chip in the chipset. Furthermore, chipset has an advancing integration, which means, it can integrate numbers of functions. Accordingly, a current chipset always equips an internal graphic module. However, a computer needs equip an external graphic card extra for getting advancing display function or more comprehensive graphic function.

Please refer to FIG. 1 , a schematic diagram showing a conventional chipset. The chipset 1 includes an internal graphic module 11 , a multiplexer 13 and a pad 15 . Moreover, the chipset 1 is connected with an external graphic module 2 , while the internal graphic module 11 is connected with the multiplexer 13 and transmits a 24 bit slow-voltage differential signal (LVDS) 111 to the multiplexer 13 . The external graphic module 2 is a peripheral component interconnect express (PCIE) graphic engine, and transmits a PCIE signal 21 to the multiplexer 13 , wherein the PCIE signal 21 is generally transmitted through 16 lanes (×16).

However, as show in FIG. 1 , the multiplexer 13 cannot process the LVDS 111 and the PCIE signal 21 simultaneously. In other words, when the multiplexer 13 is processing the LVDS 111 , the PCIE signal 21 from the external graphic module 2 cannot to be processed by the multiplexer 13 until the multiplexer 13 finishes the processing of the LVDS 111 . On the contrary, when the multiplexer 13 is processing the PCIE signal 21 , the LVDS 111 from the internal graphic module 11 cannot to be processed by the multiplexer 13 until the multiplexer 13 finishes the processing of the PCIE signal 21 . As a result, the signals from the internal graphic module 11 and the external graphic module 2 cannot be processed simultaneously, thus the processing of the graphic signals is delay, and the processing speed slows down.

Therefore, for the improvement of the processing of the graphic signals, it has become an important issue to provide a chipset, a computer system and a related control method to resolve the aforementioned problem.

In view of the foregoing, the invention is to provide a chipset and a related method for processing the signals from an internal graphic module and an external graphic module simultaneously.

A chipset electronically connected with an external graphic module of the invention is provided. The chipset includes: an internal graphic module for generating a second graphic signal; and a control module for receiving the first graphic signal, generated by an external graphic module, and the second graphic signal; wherein the control module divides the first graphic signal into at least two first graphic sub-signals and divides the second graphic signal into at least two second graphic sub-signals, respectively, and simultaneously outputs one of the first graphic sub-signals and one of the second graphic sub-signals when under a first output mode.

A method for processing graphic signals is provided. The method includes: first, dividing a first graphic signal into at least two first graphic sub-signals. Then dividing a second graphic signal into at least two second graphic sub-signals. Simultaneously outputting one of the first graphic sub-signals and one of the second graphic sub-signals when under a first output mode.

The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:

FIG. 1 is a schematic diagram showing a conventional chipset;

FIG. 2 is a schematic diagram showing the chipset according to an embodiment of the invention; and

FIG. 3 is a flow chart showing the related method according to an embodiment of the invention.

The chipset and the related control method according to the embodiments of the invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.

As show in FIG. 2 , a schematic diagram showing the chipset according to an embodiment of the invention. The chipset 3 of the invention includes an internal graphic module 31 , a control module and a pad 34 . In addition, the chipset 3 further includes a receiving interface 32 electronically connected with an external graphic module 4 .

In the present invention, the external graphic module is a PCIE graphic engine for generating a first graphic signal GS 1 , which is transmitted through 16 lanes (×16). While the internal graphic module 31 generates a second graphic signal GS 2 , which is a 24 bits LVDS.

The control module 33 is electrically connected with the receiving interface 32 , thus the first graphic signal GS 1 is received by the control module 33 through the receiving interface 32 . Besides, the control module 33 is also electrically connected with the internal graphic module 31 for receiving the second graphic signal GS 2 .

In the present invention, the control module 33 divides the first graphic signal GS 1 into at least two first graphic sub-signals as well as the second graphic signal GS 2 into at least two second graphic sub-signals. For instance, the first graphic signal GS 1 is divided into two first graphic sub-signals GS 1 a and GS 1 b respectively transmitted by 8 lanes (×8); and the second graphic signal GS 2 is divided into two second graphic sub-signals GS 2 a and GS 2 b with 12 bits respectively.

Then, when the control module 33 is under a first output mode, the control module 33 transmits one of the first graphic sub-signals (for example, GS 1 a ) and one of the second graphic sub-signals (for example, GS 2 a ) to the pad 34 , and simultaneously outputs the first graphic sub-signal GS 1 a and the second graphic sub-signal GS 2 a through the pad 34 . Or, the control module 33 simultaneously transmits the first graphic sub-signal GS 1 b and the second graphic sub-signal GS 2 b, the first graphic sub-signal GS 1 a and the second graphic sub-signal GS 2 b, or the first graphic sub-signal GS 1 b and the second graphic sub-signal GS 2 a to the pad 34 .

When under a second output mode, the control module 33 separately transmits the first graphic signal GS 1 or one of the first graphic sub-signals GS 1 a and GS 1 b to the pad 34 ; or the second graphic signal GS 2 or one of the second graphic sub-signals GS 2 a and GS 2 b to the pad 34 . Then, the first graphic signal GS 1 or the second graphic signal GS 2 is separately output through the pad 34 .

As above mentioned, the control module 33 simultaneously transmits one of the two first graphic sub-signals and one of the two second graphic sub-signals when under the first output mode. Wherein data lengths of each first graphic sub-signal and each second graphic sub-signal are half of the first graphic signal GS 1 's and the second graphic signal GS 2 's, respectively. In other words, the control module 33 simultaneously transmits a first graphic sub-signal with 8 lanes (×8) and a second graphic sub-signal with 12 bits to the pad 34 .

In addition, in another embodiment of the invention, data lengths of the graphic sub-signals are different. For instance, the first graphic GS 1 is divided into a first graphic sub-signal GS 1 a with 4 lanes (×4) and another first graphic sub-signal GS 1 b with 12 lanes (×12). And the second graphic GS 2 is divided into a second graphic sub-signal GS 2 a with 18 bits and another second graphic sub-signal GS 2 b with 6 bits. Therefore, the control module 33 can simultaneously transmit the first graphic sub-signal GS 1 a with 4 lanes (one quarter of the first graphic signal GS 1 ) and the second graphic sub-signal GS 2 a with 18 bits (three quarters of the second graphic signal GS 2 ) to the pad 34 . Or transmit the first graphic sub-signal GS 1 b with 12 lanes (three quarters of the first graphic signal GS 1 ) and the second graphic sub-signal GS 2 b with 6 bits (one quarter of the second graphic signal GS 2 ) to the pad 34 .

Accordingly, the present invention is not limited to the ratio of the data length of the graphic signal, and the control module 33 successfully transmits the graphic signal as long as the data length of the graphic signal not exceeding the max data length defined by the control module 33 .

Due to the control module 33 controls simultaneously or separately transmitting the first graphic signal GS 1 and the second graphic signal GS 2 , the signals from the external graphic module 4 and the internal graphic module 31 can be transmitted at the same time. Besides, the chipset 3 also can control the output ratios of the first graphic signal GS 1 and the second graphic signal GS 2 by the control module 33 to meet the requirement of the transmit.

Please refer to FIG. 3 , a flow chart showing the method according to an embodiment of the invention. The method includes the following steps of:

First, the step S 01 is to receive a first graphic signal from an external graphic module, and a second graphic signal from an internal graphic module.

Then, the step S 02 is to divide the first graphic signal into at least two first graphic sub-signals and divide the second graphic signal into at least two second graphic sub-signals, respectively.

After that, the step S 03 is to select a first output mode or a second output mode.

When under the first output mode, to step S 04 , simultaneously outputting one of the first graphic sub-signals and one of the second graphic sub-signals. When under the second output mode, to step S 05 , separately outputting the first graphic signal, part of the first graphic sub-signals, the second graphic signal, or part of the second graphic sub-signals.

In summary, according to the chipset and the related method of the invention, the control module receives the first graphic signal from the external graphic module and the second graphic signal from the internal graphic module, then divides the first graphic signal into at least two first graphic sub-signals and divides the second graphic signal into at least two second graphic sub-signals, respectively, and controls to simultaneously output one of the first graphic sub-signals and one of the second graphic sub-signals. Certainly, the invention also can make the control module to control separately transmitting the first graphic signal, part of the first graphic sub-signals, the second graphic signal, or part of the second graphic sub-signals to the pad. Compare with the conventional solution, the invention makes use of the control module to control transmitting graphic sub-signals, so the output ratios of the first graphic sub-signal and the second graphic sub-signal can be controlled to meet the requirement of the transmit. Thus, the signals from the internal graphic module and the external graphic module can be processed simultaneously.

Although the present invention has been described with reference to specific embodiments thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications intended to be embraced within the scope of the invention as defined in the appended claims.