TWI385572B - Graphic card, display device and display method - Google Patents

Description

Display card, display device and display method

The present invention relates to a display card, a display device, and a display method, and more particularly to a display card capable of displaying a dual view mode (Dual View) on a single display, and a display device and display method using the same.

The dual screen display mode can be divided into four types: (1) Dual View mode: Each of the two displays receives different signals and can select different resolutions and update rates. (2) Copy mode (Clone View): The sub display and the main display display the same screen. (3) Horizontal Span: Think of two monitors as the same monitor, allowing the desktop to extend from the main monitor to the secondary monitor, doubling the horizontal resolution. At this point, the update rate of the two monitors is the same. This is also the mode supported by most games. (4) Vertical Span: The vertical extension is similar to the horizontal extension mode except that the vertical resolution is doubled.

The general video graphics array (VGA) is called Dual View mode, which sends two minimum transition differential signals by the Graphics Processing Unit (GPU) (Transition Minimized Differential). Signaling, TMDS), and transmits the TMDS to two displays through two digital video interfaces (DVI), so that the two displays each receive different signals, corresponding to different display images. Dual View's dual-screen display mode allows professional drafters and document handlers to compare image and chart text on two full-screen screens for business applications, eliminating the inconvenience of opening multiple small windows on a single display. , greatly improve the convenience and efficiency of work. In addition, the game player can also use the Dual View to synchronize the reference game strategy while playing the game.

However, since the traditional Dual View presents different pictures by two displays, it not only has a higher cost than a single display, but also takes up space in use.

The present invention provides a display card that combines two video signals into one video signal to provide a dual display with a dual view effect.

The invention provides a computer device comprising the above described display card.

The present invention also provides a display method that can present a Dual View on a single display.

The present invention provides a display card that is adapted to be coupled to a display through an image display interface. The display card includes an image processing unit and a signal synthesizing unit. The image processing unit is adapted to output a first video signal and a second video signal. The signal synthesizing unit is coupled to the image processing unit to synthesize the first video signal and the second video signal to generate a third video signal to the display, so that the display outputs a first sub-display and a second in the dual screen mode. Sub display screen.

In an embodiment of the present invention, the signal synthesizing unit includes a first signal conversion module, a second signal conversion module, a synthesizer, and a third signal conversion module. The first signal conversion module is configured to convert the first video signal into a fourth video signal. The second signal conversion module is configured to convert the second video signal into a fifth video signal. The synthesizer receives the fourth video signal and the fifth video signal, and synthesizes the fourth video signal and the fifth video signal into a sixth video signal. The third signal conversion module receives the sixth video signal and converts the sixth video signal into a third video signal.

In an embodiment of the invention, the signal synthesizing unit includes a first signal conversion module, a synthesizer, and a second signal conversion module. The first signal conversion module is configured to convert the second video signal into a fourth video signal. The synthesizer receives the first video signal and the fourth video signal, and synthesizes the first video signal and the fourth video signal into a fifth video signal. The second signal conversion module receives the fifth video signal and converts the fifth video signal into a third video signal.

From another point of view, the present invention provides a computer device comprising a display, a processing module and a display card. The processing module is adapted to output a control signal. The display card is coupled to the processing module and determines whether to drive the display according to the control signal. The display card includes an image processing unit and a signal synthesizing unit. The image processing unit is adapted to output a first video signal and a second video signal. The signal synthesizing unit is coupled to the image processing unit to synthesize the first video signal and the second video signal to generate a third video signal to the display, so that the display outputs a first sub-display image and a second in the dual screen mode. Sub display screen.

In an embodiment of the present invention, the signal synthesizing unit includes a first signal conversion module, a second signal conversion module, a synthesizer, and a third signal conversion module. The first signal conversion module is configured to convert the first video signal into a fourth video signal. The second signal conversion module is configured to convert the second video signal into a fifth video signal. The synthesizer receives the fourth video signal and the fifth video signal, and synthesizes the fourth video signal and the fifth video signal into a sixth video signal. The third signal conversion module receives the sixth video signal and converts the sixth video signal into a third video signal.

In an embodiment of the invention, the signal synthesizing unit includes a first signal conversion module, a synthesizer, and a second signal conversion module. The first signal conversion module is configured to convert the second video signal into a fourth video signal. The synthesizer receives the first video signal and the fourth video signal, and synthesizes the first video signal and the fourth video signal into a fifth video signal. The second signal conversion module receives the fifth video signal and converts the fifth video signal into a third video signal.

From another point of view, the present invention also provides a display method, comprising: first, receiving a first video signal and a second video signal. Then, the first video signal and the second video signal are synthesized to generate a third video signal. Finally, the third video signal is output to a display to present a Dual View to the display.

In an embodiment of the present invention, the method for synthesizing the first video signal and the second video signal to generate a third video signal includes: first, converting the first video signal and the second video signal into a first Four video signals and fifth video signals. Then, the fourth video signal and the fifth video signal are synthesized to generate a sixth video signal. Finally, the sixth video signal is converted into a third video signal.

In an embodiment of the invention, the method for synthesizing the first video signal and the second video signal to generate a third video signal comprises: first converting the second video signal into a fourth video signal. Then, the first video signal and the fourth video signal are synthesized to generate a fifth video signal. Finally, the fifth video signal is converted into a third video signal.

In an embodiment of the invention, the first video signal, the second video signal, and the third signal are all Transition-Minimized Differential Signaling (TMDS).

In one embodiment of the present invention, the fourth video signal, the fifth video signal, and the sixth video signal are both Low-Voltage Differential Signaling (LVDS).

In an embodiment of the invention, the fourth video signal and the fifth video signal are Low-Voltage Differential Signaling (LVDS).

In an embodiment of the invention, the image display interface is one of a Digital Visual Interface (DVI), a D-Sub interface, an HDMI, a TV-OUT interface, or a Display Port.

In an embodiment of the invention, the image processing unit is a Video Graphics Array (VGA).

In an embodiment of the invention, the processing module includes a central processing unit (CPU) and a North Bridge control chip set.

Based on the above, the display card and the display method of the present invention are formed by synthesizing the first video signal and the second video signal into a third video signal, and transmitting the third video signal to the display through the image display interface, thereby being performed on a single display. Present two different screens (ie Dual View). In this way, not only can the cost of the display be reduced, but also the space for the display can be saved. It is also possible to correct the dot pitch of a large display to a value more than 0.291 mm as specified by the Swedish Labor Union's certification standard (TCO), which enhances the user's long-term viewing comfort.

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a block diagram of a computer device in accordance with an embodiment of the present invention. Referring to FIG. 1 , the computer device 100 includes a display card 110 , a display 120 , and a processing module 130 . The processing module 130 is adapted to output a control signal Ctrl, and the display card 110 determines whether to drive the display 120 according to the control signal Ctrl. The processing module 130 can include a central processing unit (CPU) (not shown) and a North Bridge control chip set (not shown). In some embodiments, the display card 110 can be coupled to a north bridge control chip set, but the invention is not limited thereto.

The display card 110 includes an image processing unit 112 and a signal synthesizing unit 114, and is adapted to be coupled to the display 120 via an image display interface 140. In this embodiment, the image display interface 140 is, for example, one of a Digital Visual Interface (DVI), a D-Sub interface, an HDMI, a TV-OUT interface, or a Display Port. The image processing unit 112 (for example, a video graphics array (VGA)) is adapted to output the first video signal S ₁ and the second video signal S ₂ .

As shown in FIG. 1 , the signal synthesizing unit 114 is configured to receive the first video signal S ₁ and the second video signal S ₂ , and synthesize the first video signal S ₁ and the second video signal S ₂ to generate a third video signal S. ₃ . In addition, the signal synthesizing unit 114 further includes a first signal conversion module 114a, a second signal conversion module 114b, a synthesizer 114c, and a third signal conversion module 114d.

In this embodiment, the first signal conversion module 114a is configured to convert the first video signal S ₁ such as TMDS into, for example, the LVDS fourth video signal S ₄ , and the second signal conversion module 114 b is used to The second video signal S ₂ of the TMDS is converted into a fifth video signal S ₅ such as LVDS.

LVDS technology is used in data transmission systems. The LVDS produced by the Line Driver typically has a Peak-to-Peak value gain of between 250 mV and 450 mV. Since low voltage switching can help reduce power consumption while maintaining high transmission speeds, LVDS technology is particularly suitable for high speed data transmission applications, such as video data processing. Therefore, LVDS applications can be found in professional video processing equipment and consumer electronics such as Flat Panel Display (FDP).

Referring to FIG. 1, the synthesizer 114c receives the fourth video signal S ₄ from the first signal conversion module 114a and the fifth video signal S ₅ from the second signal conversion module 114b, and will be fourth. The video signal S ₄ and the fifth video signal S _{5 are} combined into a sixth video signal S ₆ .

Finally, the third signal conversion module 114d receives the video signal from the synthesizer 114c of the sixth S _6, for example, to a sixth LVDS video signal S ₆ converts the video signal to a third example of TMDS S _3. When the display 120 upon receiving a third video signal S _3, can output a first sub-bis-screen display mode (not shown) and a second sub-display (not shown). That is to say, by the display card 110 being coupled to the display 120, the signals originally displayed to the two displays can be presented to the single display 120. For example, if a 29-inch liquid crystal display (LCD) capable of achieving a resolution of 1600×1200 is taken as an example, two 800×600 images can be presented on the display 120 through the above embodiment. . In this way, the user's visual comfort and work convenience are taken into consideration.

2 is a block diagram of a computer device according to another embodiment of the present invention. Referring to FIG. 2, the computer device 200 of the present embodiment is similar to the computer device 100, but the main difference between the two is that the signal synthesizing unit 214 of the computer device 200 includes only two signal conversion modules, that is, the first signal conversion module. Group 214a and second signal conversion module 214c. The operation of the computer device 200 will be described below.

As shown in FIG. 2, the computer device 200 includes a display card 210, a display 220, and a processing module 230. The processing module 230 includes, for example, a central processing unit (CPU) (not shown) and a North Bridge control chip set (not shown) for processing high speed signals. The display card 210 further includes an image processing unit 212 and a signal synthesizing unit 214 , and is adapted to be coupled to the display 220 through the image display interface 240 .

In this embodiment, the signal synthesizing unit 214 further includes a first signal conversion module 214a, a synthesizer 214b, and a second signal conversion module 214c. The first signal conversion module 214a is configured to convert the second video signal S ₂ such as TMDS into a fourth video signal S ₄ such as LVDS. Then, the synthesizer 214b receives the first video signal S ₁ from the image processing unit 212 and the fourth video signal S ₄ from the first signal conversion module 214a, and the first video signal S ₁ and the fourth video signal S _{4 is} synthesized as a fifth video signal S ₅ such as LVDS.

Next, the second signal conversion module 214c receives the fifth video signal S ₅ from the synthesizer 214b to convert the fifth video signal S ₅ into a third video signal S ₃ such as a TMDS. Finally, display 220 after receiving the third video signal S _3, the double-screen mode can output a first sub-display (not shown) and a second sub-display (not shown). That is to say, by the display card 210 being coupled to the display 220, the signals originally displayed to the two displays can be presented to the single display 220.

FIG. 3A is a flow chart showing the steps of the display method of the computer device of FIG. 1 and FIG. 2. FIG. 3A, the display method comprising the steps of: first receiving a first video signal (first video signal as shown in FIG. 1 and 2, S ₁₎ a first and a second video signal (FIG. 1 and FIG. 2 The second video signal S ₂ ) (step S110). Then, the first video signal and the second video signal are synthesized to generate a third video signal (such as the third video signal S _{3 of} FIG. 1 and FIG. 2) (step S120). Finally, the third video signal is output to a display (such as the displays 120, 220 of FIGS. 1 and 2) to cause the display to present a first sub-display and a second sub-display in a dual screen mode. (Step S130). In addition, the first video signal, the second video signal, and the third video signal are, for example, Transition-Minimized Differential Signaling (TMDS).

FIG. 3B is a flow chart showing the detailed steps of the display method of FIG. 3A, and the display method is applicable to the computer device 100 of FIG. 1. As shown in FIG. 3B, the step S120 applied to the computer device 100 may include, for example, three sub-steps, such as steps S122-S126. First, the first video signal and the second video signal are respectively converted into a fourth video signal (such as the fourth video signal S _{4 in} FIG. 1 ) and a fifth video signal (such as the fifth video signal S _{5 in} FIG. 1 ). (Step S122). Then, the fourth video signal and the fifth video signal are synthesized to generate a sixth video signal (such as the sixth video signal S _{6 in} FIG. 1) (step S124). Finally, the sixth video signal is converted into a third video signal (step S126). The fourth video signal, the fifth video signal, and the sixth video signal are, for example, Low Voltage Differential Signaling (LVDS).

FIG. 3C is a flow chart showing another step of the display method of FIG. 3A, and the display method is applicable to the computer device 200 of FIG. As shown in FIG. 3C, the step S120 applied to the computer device 200 may further include three sub-steps, such as steps S121-S125. First, the second video signal is converted into a fourth video signal (such as the fourth video signal S _{4 in} FIG. 2) (step S121). Then, the first video signal and the fourth video signal are synthesized to generate a fifth video signal (such as the fifth video signal S _{5 in} FIG. 2) (step S123). Finally, the fifth video signal is converted into a third video signal (step S125). The fourth video signal and the fifth video signal are, for example, LVDS.

In summary, the computer device of the exemplary embodiment of the present invention mainly combines two different signals into one signal by using a display card and a display method, and transmits the synthesized signal to the display through the image display interface. The screen in dual screen mode is then presented on a single display. In this way, not only the user's visual comfort and work convenience, but also the cost and space of the display are reduced.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100, 200. . . Computer device

110, 210. . . graphics card

112, 212. . . Image processing unit

114,214. . . Signal synthesis unit

114a, 214a. . . First signal conversion module

114b, 214c. . . Second signal conversion module

114c, 214b. . . Synthesizer

114d. . . Third signal conversion module

120, 220. . . monitor

130, 230. . . Processing module

140, 240. . . Image display interface

S ₁ . . . First video signal

S ₂ . . . Second video signal

S ₃ . . . Third video signal

S ₄ . . . Fourth video signal

S ₅ . . . Fifth video signal

S ₆ . . . Sixth video signal

Ctrl. . . control signal

S110～S130, S121～S125, S122～S126. . . step

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

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

FIG. 3A is a flow chart showing the steps of the display method of the computer device of FIG. 1 and FIG. 2. FIG.

FIG. 3B is a flow chart showing the detailed steps of the display method of FIG. 3A.

FIG. 3C is a flow chart showing another detailed step of the display method of FIG. 3A.

100. . . Computer device

110. . . graphics card

112. . . Image processing unit

114. . . Signal synthesis unit

114a. . . First signal conversion module

114b. . . Second signal conversion module

114c. . . Synthesizer

114d. . . Third signal conversion module

120. . . monitor

130. . . Processing module

140. . . Image display interface

S ₁ . . . First video signal

S ₂ . . . Second video signal

S ₃ . . . Third video signal

S ₄ . . . Fourth video signal

S ₅ . . . Fifth video signal

S ₆ . . . Sixth video signal

Ctrl. . . control signal

Claims (23)

A display card is coupled to a display through an image display interface, the display card includes: an image processing unit adapted to output a first video signal and a second video signal; and a signal synthesizing unit coupled to the image The processing unit combines the first video signal with the second video signal to generate a third video signal to the display, so that the display outputs a first sub-display screen and a second sub-display in a dual screen mode. Picture. The display card of claim 1, wherein the signal synthesizing unit comprises: a first signal conversion module, converting the first video signal into a fourth video signal; and a second signal conversion module, Converting the second video signal into a fifth video signal; a synthesizer, receiving the fourth video signal and the fifth video signal, and synthesizing the fourth video signal and the fifth video signal into a sixth video signal And a third signal conversion module, receiving the sixth video signal, and converting the sixth video signal into the third video signal. The display card of claim 1, wherein the signal synthesizing unit comprises: a first signal conversion module for converting the second video signal into a fourth video signal; and a synthesizer receiving the first a video signal and the fourth video signal, and synthesizing the first video signal and the fourth video signal into a fifth video signal; and a second signal conversion module, receiving the fifth video signal, the first The five video signals are converted into the third video signal. The display card of claim 1, wherein the first video signal, the second video signal, and the third video signal are both Transition Minimized Differential Signaling (TMDS). The display card of claim 1, wherein the image display interface is a digital video interface (DVI), a D-Sub interface, an HDMI interface, a TV-OUT interface, or a display port. one of them. The display card of claim 1, wherein the image processing unit is a Video Graphics Array (VGA). The signal synthesizing module of claim 2, wherein the fourth video signal, the fifth video signal, and the sixth video signal are both Low Voltage Differential Signaling (LVDS). The signal synthesizing module of claim 3, wherein the fourth video signal and the fifth video signal are both Low Voltage Differential Signaling (LVDS). A computer device, comprising: a display; a processing module, outputting a control signal; and a display card coupled to the processing module, determining whether to drive the display according to the control signal, the display card comprising: an image processing unit And outputting a first video signal and a second video signal; and a signal synthesizing unit coupled to the image processing unit to synthesize the first video signal and the second video signal to generate a third video signal The display is such that the display outputs a first sub-display screen and a second sub-display screen in a dual screen mode. The computer device of claim 9, wherein the signal synthesizing unit comprises: a first signal conversion module, converting the first video signal into a fourth video signal; and a second signal conversion module, Converting the second video signal into a fifth video signal; a synthesizer, receiving the fourth video signal and the fifth video signal, and synthesizing the fourth video signal and the fifth video signal into a sixth video signal And a third signal conversion module, receiving the sixth video signal, and converting the sixth video signal into the third video signal. The computer device of claim 9, wherein the signal synthesizing unit comprises: a first signal conversion module, converting the second video signal into a fourth video signal; and a synthesizer receiving the first a video signal and the fourth video signal, and synthesizing the first video signal and the fourth video signal into a fifth video signal; and a second signal conversion module, receiving the fifth video signal, and the fifth The video signal is converted to the third video signal. The computer device of claim 9, wherein the first video signal, the second video signal, and the third video signal are both Transition Minimized Differential Signaling (TMDS). The computer device of claim 9, wherein the image display interface is a digital video interface (DVI), a D-Sub interface, an HDMI interface, a TV-OUT interface, or a display port. one of them. The computer device of claim 9, wherein the image processing unit is a Video Graphics Array (VGA). The computer device of claim 9, wherein the processing module comprises a central processing unit (CPU) and a North Bridge control chip set. The computer device of claim 10, wherein the fourth video signal, the fifth video signal, and the sixth video signal are both Low Voltage Differential Signaling (LVDS). The computer device of claim 11, wherein the fourth video signal and the fifth video signal are both Low Voltage Differential Signaling (LVDS). A display method includes: receiving a first video signal and a second video signal; synthesizing the first video signal and the second video signal to generate a third video signal; and outputting the third video signal to a display So that the display presents a first sub-display and a second sub-display in a dual screen mode. The display method of claim 18, wherein the synthesizing the first video signal and the second video signal to generate a third video signal comprises: the first video signal and the second video signal Converting to a fourth video signal and a fifth video signal respectively; synthesizing the fourth video signal and the fifth video signal to generate a sixth video signal; and converting the sixth video signal into the third video signal . The display method of claim 18, wherein the synthesizing the first video signal and the second video signal to generate a third video signal comprises: converting the second video signal into a fourth video signal And synthesizing the first video signal and the fourth video signal to generate a fifth video signal; and converting the fifth video signal into the third video signal. The display method of claim 18, wherein the first video signal, the second video signal, and the third video signal are both Transition Minimized Differential Signaling (TMDS). The display method of claim 19, wherein the fourth video signal, the fifth video signal, and the sixth video signal are both Low Voltage Differential Signaling (LVDS). The display method of claim 20, wherein the fourth video signal and the fifth video signal are both Low Voltage Differential Signaling (LVDS).