TWI763350B - Separate display system - Google Patents

Abstract

A separate display system includes a processing device, a display device, and a transmission cable. The processing device includes a processing unit and a low-to-high unit. The processing unit generates a first image signal having a first transmission rate and a first number of channels. The low-to-high unit converts the first image signal into a second image signal having a second transmission rate and a second number of channels. The first transmission rate is lower than the second transmission rate. The display device includes a high-to-low unit and a display unit. The high-to-low unit receives and converts the second image signal into a third image signal having a third transmission rate and a third number of channels. The display unit displays the third image signal. The transmission cable connects the low-to-high unit to the high-to-low unit, and the number of channels of the transmission cable is the same as the number of the second channel.

Description

Separate display system

This case is about a separate display system.

In a traditional display system, such as a TV, the host and the display screen are arranged in the same body. This configuration causes the volume of the display system to be too large. When the user installs or places the display system, the display system takes up too much space, which is inconvenient, and affects the aesthetics of the environment where the display system is placed.

With the advancement of science and technology, people's demand for multimedia audio and video effects and quality has also increased. For example, a vivid display screen and a good feeling experience are emphasized. The industry has improved the picture quality and resolution of the AV specification technology. High image quality and high resolution make the amount of transmitted signals huge, and the transmission efficiency of image signals must be improved. The specifications of the hardware have increased accordingly. Therefore, manufacturers design multiple transmission channels in the transmission line, and the volume of the transmission line increases with the number of transmission channels.

As mentioned above, in order to improve the transmission efficiency of the image signal and be able to handle the huge amount of transmission signals, how to reduce the excessive cost caused by the transmission line being too thick, and avoid the signal energy weakening caused by the transmission line being too long when transmitting the image signal , the above are all issues that urgently need to be addressed and resolved.

In view of the above, in some embodiments, a separate display system includes a processing device, a display device, and a transmission line. The processing device includes a processing unit and a low-to-high unit. The processing unit generates a first image signal, and the first image signal has a first transmission rate and a first channel number. The low-to-high unit converts the first image signal into a second image signal, the second image signal has a second transmission rate and a second channel number, the first transmission rate is lower than the second transmission rate, and the first channel number is higher than the second number of channels. The display device includes a high-to-low unit and a display unit. The display device receives and converts the second image signal into a third image signal, and the third image signal has a third transmission rate and a third channel number. The display unit displays the third image signal. The transmission line connects the low-to-high unit to the high-to-low unit, and the number of channels of the transmission line is substantially the same as the number of the second channel.

Please refer to FIG. 1 together. FIG. 1 is a schematic diagram of an embodiment of a separate display system applying the present invention. The separate display system includes a processing device 100 , a display device 200 and a transmission line 300 . The separate display system can be applied to a multimedia player. Taking a TV as an example, the display device 200 is the display screen of the TV, and the processing device 100 is the host of the TV. The processing device 100 can generate an image signal as a differential signal (including a positive differential signal and a negative differential signal), and send the image signal to the display device 200 to display the image. But not limited to this, in other embodiments, the processing device 100 may also generate image signals that are not differential signals (eg, single-ended signals) to the display device 200 to display images. The processing device 100 and the display device 200 are not jointly designed in a casing, that is, the processing device 100 and the display device 200 are two separate and independent devices. The processing device 100 and the display device 200 are connected to each other by a transmission line 300 . The transmission line 300 has two connectors, one of which is connected to the connector on the processing device 100 , and the other connector of the transmission line 300 is connected to the connector on the display device 200 . The transmission line 300 includes a plurality of pairs of signal transmission channels, and one transmission channel in each pair of signal transmission channels is used to transmit the positive differential signal of the image signal. The other transmission channel is used for transmitting the negative differential signal of the image signal. Thereby, the processing device 100 sends the image signal to the display device 200 via the transmission line 300, and the display device 200 then displays the image according to the image signal. The length of the transmission line 300 can be arbitrarily designed according to the user, and the processing device 100 and the display device 200 can be placed at a distance more than a predetermined distance according to the user's usage habits and environmental space constraints. In some embodiments, the distance between the processing device 100 and the display device 200 and the length of the transmission line 300 may be more than 50 centimeters, and may even be as long as several meters.

Referring to FIG. 2 , the processing device 100 includes a processing unit 110 and a low-to-high unit 130 . The low-to-high unit 130 is coupled between the processing unit 110 and the transmission line 300 . There are multiple pairs of transmission channels between the low-to-high unit 130 and the processing unit 110 (hereinafter referred to as the first channel 410 , as shown in the figure, a diagonal line is drawn on the first channel 410 to represent multiple pairs of transmission channels). The first channel 410 is used for transmitting the image signal according to a transmission rate (hereinafter referred to as the first transmission rate). The communication port 510 is coupled to the processing unit 110 . The communication port 510 receives a video data D1 from the outside and transmits the video data D1 to the processing unit 110 . The processing unit 110 generates the aforementioned image signal (hereinafter referred to as the first image signal S1 ) according to the video data D1 . The processing unit 110 sends the first image signal S1 to the low-to-high unit 130 through the first channel 410 according to the first transmission rate. The number of pairs of differential signals in the first image signal S1 corresponds to the number of transmission channels in the first channel 410 , that is, the first image signal S1 and the first channel 410 have the same number of channels (hereinafter referred to as the first channel 410 ). one channel). Each pair of transmission channels in the first image signal S1 is respectively transmitted by each pair of transmission channels of the first channel 410 .

The transmission line 300 has multiple pairs of transmission channels (hereinafter referred to as the second channel), and the width and thickness of the transmission line 300 are related to the number of the second channels (hereinafter referred to as the second channel number). The low-to-high unit 130 is used for converting the transmission rate of the first image signal S1. Specifically, after the low-to-high unit 130 receives the first image signal S1, the low-to-high unit 130 converts the first image signal S1 with the first transmission rate into the second image signal S2. The second image signal S2 has a second transmission rate, and the second transmission rate is greater than the first transmission rate. The low-to-high unit 130 then sends the converted second image signal S2 to the transmission line 300 . The number of pairs of differential signals in the second image signal S2 corresponds to the number of transmission channels in the second channel number. The second image signal S2 has the second channel number, and the processing device 100 sends the second image signal S2 with the second transmission rate to the display device 200 through the transmission line 300 . Each pair of transmission channels in the second image signal S2 is respectively transmitted by each pair of transmission channels of the second channel. Since the second transmission rate of the second image signal S2 is greater than the first transmission rate, the number of the second channel can be smaller than the number of the first channel under the condition that the image resolution specification remains unchanged and the transmission rate is increased, thereby reducing the width of the transmission line 300 Small. The width of the transmission line 300 is reduced, so that the manufacturing cost of the transmission line 300 is reduced, and the use of the transmission line 300 is also more convenient. In addition, increasing the transmission rate of the image signal on the transmission line 300 can also prevent the image signal from consuming energy and distorting during transmission.

In some embodiments, after the display device 200 receives the second image signal S2, the display device 200 first reduces the second image signal S2 to the same transmission rate as before the increase, and then displays the image, but not limited to this, the display The device 200 can also reduce the transmission rate of the second image signal S2 to a different transmission rate from that before the increase, and then display the image. In detail, the display device 200 includes a high-to-low unit 210 and a display unit 230 . The high-to-low unit 210 is coupled between the display unit 230 and the transmission line 300 , and there are multiple pairs of transmission channels (hereinafter referred to as the third channel 430 ) between the high-to-low unit 210 and the display unit 230 . The third channel 430 is used for transmitting the image signal (hereinafter referred to as the third image signal S3 ) according to a transmission rate (hereinafter referred to as the third transmission rate). The third transmission rate is smaller than the second transmission rate, and the third transmission rate may be substantially the same as the first transmission rate or different from the first transmission rate. After the high-to-low unit 210 receives the second video signal S2 from the transmission line 300, the high-to-low unit 210 converts the second video signal S2 having the second transmission rate into a third video signal S3. The third video signal S3 includes a plurality of pairs of differential signals, and the third video signal S3 has the aforementioned third transmission rate. The number of pairs of differential signals of the third image signal S3 is the same as the number of transmission channels in the third channel 430 (hereinafter referred to as the number of third channels). Each pair of signal components in the third image signal S3 is respectively transmitted by each pair of transmission channels of the third channel 430 . And when the third transmission rate is substantially the same as the first transmission rate, the number of the third channels is equal to the number of the first channels, and the third image signal S3 is substantially the same as the first image signal S1. When the third transmission rate is different from the first transmission rate, the third transmission rate is different from the first transmission rate. The high-to-low unit 210 then sends the third image signal S3 to the display unit 230 via the third channel 430 at the third transmission rate. After receiving the third image signal S3, the display unit 230 displays the image according to the third image signal S3.

Based on this, after the first image signal S1 is converted into the second image signal S2 with a relatively higher transmission rate through the low-to-high unit 130, the number of the second channels of the transmission line 300 can be reduced thereby, so as to avoid the transmission line 300 being too thick and This causes inconvenience to the user and cost of the transmission line 300 . In addition, through the high-to-low unit 210, the second image signal S2 with the increased transmission rate can be converted into a third image signal S3 with a third transmission rate, and the third transmission rate is lower than the second transmission rate of the second image signal S2 Therefore, the display unit 230 can display the third image signal S3 after receiving the third image signal S3.

In some embodiments, the first channel number divided by the second channel number is a ratio, and the second transmission rate divided by the first transmission rate is also the ratio. The third channel number divided by the second channel number is substantially the same as the ratio, and the second transmission rate divided by the third transmission rate is also the ratio. That is to say, the number of channels is inversely proportional to the transmission rate, and the multiple of increasing the transmission rate can correspond to the multiple of decreasing the number of channels. When the second transmission rate can be twice the first transmission rate, the second channel number can be half of the first channel number; when the second transmission rate can be twice the third transmission rate, the second channel number can be It is half the number of third channels. However, the above embodiments are not limited. In other embodiments, the ratio between the first transmission rate and the second transmission rate and the ratio between the number of first channels and the number of second channels may be different; the number of second channels and the number of third channels may be different. The ratio of the number to the ratio of the first channel number and the second channel number may also be different; the ratio of the second transmission rate and the third transmission rate to the ratio of the first channel number and the second channel number may also be different.

In some embodiments, for example, the resolution of the first image signal S1 generated by the processing unit 110 is 4k2k and the first transmission rate is 75MHz, and the processing unit 110 sends the first image signal S1 through the first channel according to the transmission rate of 75MHz 410 to the low-to-high unit 130, the first channel number of the first channel 410 is 16 pairs. After receiving the first image signal S1, the low-to-high unit 130 converts the first image signal S1 with a transmission rate of 75MHz into a second image signal S2, the second image signal S2 has a second transmission rate of 150MHz, and the resolution is maintained at 4k2k. The low-to-high unit 130 then sends the second image signal S2 to the display device 200 through the transmission line 300. Since the transmission rate is increased from 75MHz to 150MHz, that is, the transmission rate is doubled, the number of second channels of the transmission line 300 can be reduced to half. That is, the number of second channels may be 8 pairs. After the display device 200 receives the second image signal S2 with a transmission rate of 150 MHz, the high-to-low unit 210 converts the second image signal S2 into a third image signal S3, and the third image signal S3 has a third transmission rate of 75 MHz. The transmission rate of the third video signal S3 is reduced to half (from 150MHz to 75MHz) of the second video signal S2. For example, when the third transmission rate is substantially the same as the first transmission rate, the high-to-low unit 210 will switch to 75MHz again. The transmission rate sends the third video signal S3 to the display unit 230 via the third channel 430, and the display unit 230 displays the third video signal S3.

In some embodiments, as shown in FIG. 2 , the processing unit 110 may further generate a control signal C1 , and the control signal C1 is used to adjust the display effect of the display unit 230 . For example, the control signal C1 can be a Pulse Width Modulation (PWM) signal or a Serial Peripheral Interface (SPI) signal. The PWM signal or the SPI signal can be used to adjust the display brightness of the display unit 230 . In addition, the control signal C1 can also be a signal for controlling the firmware update of the display unit 230 . After generating the control signal C1 and the first video signal S1 , the processing unit 110 sends the control signal C1 and the first video signal S1 to the low-to-high unit 130 respectively. The control signal C1 is a low-speed signal, and the path sent to the low-to-high unit 130 is a low-speed signal transmission channel. Therefore, the transmission path of the control signal C1 is different from that of the first channel 410 . After the low-to-high unit 130 receives the control signal C1 and the first image signal S1, the low-to-high unit 130 combines the control signal C1 and the first image signal S1, and converts it into a second image signal S2 with a second transmission rate, The low-to-high unit 130 then sends the converted second image signal S2 to the high-to-low unit 210 via the transmission line 300 .

After the high-to-low unit 210 receives the second image signal S2 from the transmission line 300, the high-to-low unit 210 converts the transmission rate according to the second image signal S2, and captures the second image signal S2 to obtain the control signal C2 and has a third The third image signal S3 of the transmission rate. The control signal C2 corresponds to the control signal C1, that is, the control signal C2 is substantially the same as the control signal C1. The high-to-low unit 210 sends the control signal C2 and the third image signal S3 to the display unit 230 respectively. The transmission path of the control signal C2 is also different from that of the third channel 430, and the transmission channel of the control signal C2 is a low-speed signal transmission channel. After the display unit 230 receives the control signal C2 and the third image signal S3, the display unit 230 adjusts the display effect according to the control signal C2 and displays the third image signal S3, or the display unit 230 may display the third image signal S3 according to the control signal C2 For example, the third image signal S3 can display the adjustment operation interface corresponding to the control signal C2 for the display unit 230 , which can be used to change the backlight brightness of the display unit 230 .

In some embodiments, please refer to FIG. 3 , the low-to-high unit 130 includes a first conversion circuit 131 and a compression circuit 133 , the first conversion circuit 131 is coupled between the processing unit 110 and the compression circuit 133 , and the compression circuit 133 is coupled to the transmission line 300. There is a first channel 410 between the first conversion circuit 131 and the processing unit 110 , and a second channel between the compression circuit 133 and the high-to-low unit 210 . After the low-to-high unit 130 receives the first image signal S1, the first conversion circuit 131 converts the first image signal S1 with the first transmission rate into the fourth image signal S4 with the fourth transmission rate. The fourth transmission rate is greater than the first transmission rate. The first conversion circuit 131 then sends the converted fourth image signal S4 to the compression circuit 133 . The compression circuit 133 receives the fourth image signal S4, and the compression circuit 133 compresses the fourth image signal S4 into a second image signal S2 with a second transmission rate. The transmission rate of the compressed image signal is faster than the transmission rate before compression. Therefore, the second transmission rate is greater than the fourth transmission rate and the first transmission rate.

The high-to-low unit 210 includes a decompression circuit 211 and a second conversion circuit 213 . The decompression circuit 211 is coupled between the transmission line 300 and the second conversion circuit 213 , and the second conversion circuit 213 is coupled to the display unit 230 . A second channel is provided between the processing device 100 and the decompression circuit 211 , and a third channel 430 is provided between the second conversion circuit 213 and the display unit 230 . After the display device 200 receives the second image signal S2 from the transmission line 300, the decompression circuit 211 decompresses the second image signal S2 into a fifth image signal S5 having a fifth transmission rate. The transmission rate of the decompressed image signal is slower than the transmission rate before decompression, so the fifth transmission rate is smaller than the second transmission rate. The fifth image signal S5 corresponds to the fourth image signal S4. In some embodiments, the fifth image signal S5 may be substantially the same as the fourth image signal S4, and the fifth transmission rate may be substantially the same as the fourth transmission rate, but not equal to This is limited, the fifth image signal S5 may also be different from the fourth image signal S4, and the fifth transmission rate may be different from the fourth transmission rate. The decompression circuit 211 sends the decompressed fifth image signal S5 to the second conversion circuit 213, and the second conversion circuit 213 converts the fifth image signal S5 with the fifth transmission rate into the third image with the third transmission rate Signal S3. The converted third transmission rate is smaller than the fifth transmission rate. The second converting circuit 213 sends the third image signal S3 to the display unit 230, and the display unit 230 displays the third image signal S3.

In some embodiments, the processing unit 110 also sends the generated control signal C1 to the first conversion circuit 131 , and the transmission path of the control signal C1 to the first conversion circuit 131 is different from that of the first channel. After the first conversion circuit 131 receives the control signal C1 and the first video signal S1, the first conversion circuit 131 combines the control signal C1 and the first video signal S1, and converts it into a fourth video signal S4 with a fourth transmission rate. That is to say, the fourth image signal S4 corresponds to the control signal C1 and the first image signal S1 , and the first conversion circuit 131 then sends the converted fourth image signal S4 to the compression circuit 133 . The compression circuit 133 compresses the fourth image signal S4 into a second image signal S2 , and the compression circuit 133 transmits the second image signal S2 to the decompression circuit 211 via the transmission line 300 .

After the decompression circuit 211 receives the second video signal S2 from the transmission line 300, the decompression circuit 211 decompresses the second video signal S2 into a fifth video signal S5 having a fifth transmission rate. The decompression circuit 211 sends the decompressed fifth image signal S5 to the second conversion circuit 213. The second conversion circuit 213 converts the transmission rate of the fifth image signal S5, and extracts the fifth image signal S5 to obtain the control signal C2 and a third image signal S3 with a third transmission rate. The third image signal S3 corresponds to the first image signal S1, the control signal C2 corresponds to the control signal C1, and the control signal C2 is substantially the same as the control signal C1. The high-to-low unit 210 sends the control signal C2 and the third image signal S3 to the display unit 230 respectively. The transmission path of the control signal C2 to the display unit 230 is different from that of the third channel. The display unit 230 adjusts the display effect and displays the third image signal S3 according to the control signal C2, or the display unit 230 may display the third image signal S3 according to the control signal C2.

In some embodiments, the first conversion circuit 131 may combine the first image signal S1 and the control signal C1 according to a combining mode, which may be a time sharing mode (Time Sharing), a space sharing mode (Space Sharing), or Time-sharing and space-sharing mode. In the time-sharing mode, for example, the non-image area is used, and the first conversion circuit 131 connects the control signal C1 before the first image signal S1 or after the first image signal S1 to obtain the second image signal S2. In some embodiments, the image information P1 formed corresponding to the second image signal S2 is shown in FIG. 4 . The peripheral portion P11 of the image information P1 includes the control signal C1, and the middle portion P13 of the image information P1 includes the first image signal S1. The second converting circuit 213 captures the peripheral portion P11 of the image information P1 from the image information P1 corresponding to the second image signal S2 to obtain the control signal C2 corresponding to the control signal C1. The second converting circuit 213 extracts the middle part P13 from the image information P1 corresponding to the second image signal S2 to obtain the third image signal S3 corresponding to the first image signal S1. That is, the display unit 230 can display the middle part P13 of the image frame corresponding to the second image signal S2, and the display unit 230 can control and adjust the display effect according to the peripheral part of the image frame. In other embodiments, the peripheral part P11 of the image frame can be replaced by the right half of the image frame, the middle part P13 of the image frame can be replaced by the left half of the image frame, the distribution positions of the image signals and control signals are not limited, and so on.

In some embodiments, the space sharing mode uses, for example, a Least Significant Bit (LSB) portion, and the first conversion circuit 131 increases the signal bit length of the first video signal S1 (increased to the length of the first video signal S1 ). LSB part), and store the control signal C1 in the newly added bit of the first image signal S1 to obtain the second image signal S2. The second conversion circuit 213 obtains the control signal C2 corresponding to the control signal C1 according to the LSB part corresponding to the second video signal S2, and obtains the third video signal S3 corresponding to the first video signal S1 according to the remaining part.

In some embodiments, please refer to FIG. 5 , the processing unit 110 further includes a standby circuit 111 . The standby circuit 111 is coupled to the low-to-high unit 130 . When the user does not use the display device 200 , some circuits (eg, CPU circuit, GPU circuit) that consume more power in the processing device 100 can enter the sleep mode and the standby circuit 111 is in a standby state. When the user wants to use the display device 200 to actuate the display device 200 , the display device 200 receives the wake-up signal W1 from the controller, and the display device 200 sends the wake-up signal W1 to the standby circuit 111 . When the processing unit 110 receives the wake-up signal W1, the processing unit 110 activates the relatively power-consuming circuit. The wake-up signal W1 may come from a WIFI antenna, a microphone, a remote control or a button on the display device 200 . In some embodiments, the display unit 230 receives at least one wake-up signal (hereinafter referred to as the wake-up signal W1 ) from the WIFI antenna, the microphone, the remote control or the button of the display device 200 , and transmits the wake-up signal W1 from at least one different source To the high-to-low unit 210, the high-to-low unit 210 converts the wake-up signal W1 into an integrated signal W2. The high-to-low unit 210 sends the integrated signal W2 to the processing device 100 through the transmission line 300 . The transmission line 300 further includes a return signal transmission channel (hereinafter referred to as the fourth channel), and the fourth channel is used for transmitting the integrated signal W2 to the processing device 100 . Compared with the second channel for transmitting the second image signal S2, the transmission rate of the fourth channel when transmitting the integrated signal W2 is relatively low, so the fourth channel is different from the second channel.

After the low-to-high unit 130 of the processing device 100 receives the integrated signal W2 from the transmission line 300, the low-to-high unit 130 converts the integrated signal W2 into a trigger signal W3, the trigger signal W3 corresponds to the wake-up signal W1 from different sources, and the low-to-high unit 130 sends The trigger signal W3 is sent to the standby circuit 111 . A plurality of transmission channels (hereinafter referred to as the fifth channel 450 , as shown in FIG. 4 ) are included between the standby circuit 111 and the low-to-high unit 130 . For example, the number of transmission channels of the fifth channel 450 (hereinafter referred to as the number of fifth channels) may be 4, and each transmission channel corresponds to a different source of the wake-up signal W1 (ie, the WIFI antenna, the microphone, the remote control, and the display device 200 ). button above). When the wake-up signal W1 comes from the microphone, the low-to-high unit 130 sends the trigger signal W3 to the standby circuit 111 through the transmission channel corresponding to the microphone in the fifth channel according to the wake-up signal W1 from the microphone. Alternatively, when the wake-up signal W1 comes from the remote controller, the low-to-high unit 130 sends the trigger signal W3 to the standby circuit 111 through the transmission channel corresponding to the remote controller in the fifth channel according to the wake-up signal W1 from the remote controller. The descriptions corresponding to the WIFI antenna, buttons on the display device 200 or other sources are analogous, and will not be repeated here. The standby circuit 111 wakes up the circuit in the sleep mode according to the received trigger signal W3, the circuit switches from the sleep mode to the operation state, and the processing circuit generates the first image signal S1 and the control signal C1 in the operation state.

In some embodiments, please refer to FIG. 6 , with reference to FIGS. 2 , 3 and 5 , the processing device 100 ′ may include a plurality of low-to-high units, and the display device 200 ′ may include a plurality of high-to-low units, the number of It is not a limitation of this case. The processing device 100' includes two low-to-high units 130, 150, and the display device 200' includes two high-to-low units 210, 250. The first channel 411 is coupled between the processing unit 110 and the low-to-high unit 150 , and the third channel 431 is coupled between the display unit 230 and the high-to-low unit 250 . The low-to-high unit 150 includes a first conversion circuit 151 and a compression circuit 153 , and the high-to-low unit 250 includes a decompression circuit 251 and a second conversion circuit 253 . The operations between the low-to-high unit 150, the high-to-low unit 250 and the processing unit 110, the transmission line 300, and the display unit 230 are similar to those of the low-to-high unit 130 and the high-to-low unit 210 in the above-mentioned embodiments, so the following are the following examples: An embodiment is briefly described.

As shown in FIG. 6 , the processing unit 110 can simultaneously generate a plurality of image signals and a plurality of control signals. The plurality of image signals are used to display images on the display unit 230 , and the plurality of control signals are used to adjust the display effect of the display unit 230 . The processing unit 110 generates the first image signal S11 and the control signal C11 , and sends the first image signal S11 and the control signal C11 to the low-to-high unit 150 . The first video signal S11 and the first channel 411 have the same number of first channels, and the first video signal S11 has substantially the same first transmission rate as the first video signal S1. The first converting circuit 151 in the low-to-high unit 150 combines the control signal C11 and the first image signal S11, and converts it into a fourth image signal S41. The fourth image signal S41 has substantially the same fourth transmission rate as the fourth image signal S4, and the fourth transmission rate of the fourth image signal S41 is greater than the first rate of the first image signal S11. The first conversion circuit 151 sends the converted fourth image signal S41 to the compression circuit 153 . The compression circuit 153 compresses the fourth image signal S41 into the second image signal S21. The second video signal S21 has substantially the same second transmission rate as the second video signal S2. The second transmission rate of the second image signal S21 is greater than the fourth transmission rate of the fourth image signal S41. The transmission line 300 further includes another second channel corresponding to the second image signal S21. The second channel corresponding to the second video signal S21 has the same number of second channels as the second channel corresponding to the second video signal S2. The compression circuit 153 transmits the second video signal S21 to the high-to-low unit 250 through the second channel corresponding to the second video signal S21.

After the high-to-low unit 250 receives the second image signal S21, the decompression circuit 251 in the high-to-low unit 250 decompresses the second image signal S21 into a fifth image signal S51. The fifth video signal S51 has substantially the same fifth transmission rate as the fifth video signal S5. The fifth image signal S51 corresponds to the fourth image signal S41. The fifth transmission rate of the fifth image signal S51 is lower than the second transmission rate of the second image signal S21. The decompression circuit 251 sends the decompressed fifth image signal S51 to the second conversion circuit 253 . The second conversion circuit 253 converts the transmission rate of the fifth image signal S51, and captures the fifth image signal S51 to obtain the control signal C21 and the third image signal S31. The third video signal S31 has substantially the same third transmission rate as the third video signal S3. The third image signal S31 corresponds to the first image signal S11, the control signal C21 corresponds to the control signal C11, and the control signal C21 is substantially the same as the control signal C11. The high-to-low unit 250 sends the control signal C21 and the third image signal S31 to the display unit 230 respectively, wherein the transmission path of the control signal C21 between the high-to-low unit 250 and the display unit 230 is also different from that of the third channel. The display unit 230 adjusts the display effect and displays the third image signal S31 according to the control signal C21, or the display unit 230 may display the third image signal S31 according to the control signal C21.

In some embodiments, the standby circuit 111 can be coupled to the low-to-high unit 150 , the display unit 230 receives at least one wake-up signal from a WIFI antenna, a microphone, a remote control or a button of the display device 200 , and the high-to-low unit 250 will come from The wake-up signal from at least one different source is integrated into another integrated signal, and the display unit 230 sends the other integrated signal to the high-to-low unit 210 or the high-to-low unit 250. For example, the display unit 230 sends the other integrated signal via The high-to-low unit 250 is sent to the transmission line 300 , and the other integrated signal is transmitted to the processing device 100 ′ through the fourth channel of the transmission line 300 . The low-to-high unit 150 of the processing device 100' converts the other integrated signal into another trigger signal. The other trigger signal corresponds to the aforementioned wake-up signals from different sources. Another fifth channel is also included between the standby circuit 111 and the low-to-high unit 150, and the low-to-high unit 130 sends the other trigger signal according to a transmission channel corresponding to the signal source in the other fifth channel To the standby circuit 111, the standby circuit 111 wakes up the circuit in the sleep mode according to the received trigger signal, the circuit switches from the sleep mode to the operating state, and the processing unit 110 generates the first image signals S1, S11 in the operating state and control signals C1, C11.

In some embodiments, each image transmission signal S1 , S2 , S3 , S4 , S5 , S11 , S21 , S31 , S41 , and S51 includes video (Video) data and audio (Audio) information. In some embodiments, the low-to-high units 130, 150, and the high-to-low units 210, 250 may be software, hardware, firmware, or combined logic circuits. The processing unit 110 may be an embedded controller (EC), an application specific integrated circuit (ASIC), or a system on a chip (SOC). The display unit may be a liquid crystal display (Liquid-Crystal Display; LCD), or a light emitting diode (Light Emitting Diode; LED).

To sum up, in some embodiments, the processing device of the separate display system sets a low-to-high unit and a high-to-low unit is set on the display device, and the low-to-high unit converts the transmission rate of the image signal and performs compression, In order to improve the transmission rate of the image signal, the number of channels of the transmission line can be reduced, so as to avoid the inconvenience of the user and the cost of the transmission line caused by the thick transmission line, and to avoid the energy consumption and distortion of the image signal during transmission caused by the long transmission line. The high-to-low unit can decompress the image signal received from the transmission line and convert the transmission rate to reduce the transmission rate of the image signal, so that the display unit can display the image signal smoothly. In addition, according to the arrangement of multiple high-to-low units and multiple low-to-high units, the efficiency of image signal transmission can also be improved, and the amount of image signals that can be transmitted is increased to provide higher-resolution image display.

Although this case has been disclosed with the above examples, it is not intended to limit this case. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of this case. Therefore, the protection scope of this case is The scope of the patent application attached herewith shall prevail.

100: Processing device 100': Processing Unit 110: Processing unit 111: Standby circuit 130: low to high unit 131: The first conversion circuit 133: Compression circuit 150: low to high unit 151: first conversion circuit 153: Compression circuit 200: Display device 200’: Display unit 210: High to Low Unit 211: Decompression circuit 213: Second conversion circuit 230: Display unit 250: High to Low Unit 251: Decompression circuit 253: Second conversion circuit 300: Transmission Line 410: first channel 411: first channel 430: Third channel 431: Third channel 450: Fifth channel 510: communication port S1: The first video signal S11: The first video signal S2: The second video signal S21: The second video signal S3: The third video signal S31: The third video signal S4: Fourth video signal S41: Fourth video signal S5: Fifth video signal S51: Fifth video signal W1: wake-up signal W2: Integrated signal W3: Trigger signal C1: Control signal C11: Control signal C2: Control signal C21: Control signal D1: Video data P1: Image Information P11: Peripheral part P13: Middle part

[FIG. 1] is a schematic diagram of an embodiment of a separate display system applying the present invention. [FIG. 2] is a schematic block diagram of an embodiment of a separate display system according to the present application. [FIG. 3] is a block diagram of another embodiment of the separate display system according to the present application. [FIG. 4] is a schematic diagram of an embodiment of the image information of the separate display system according to the present application. [FIG. 5] is a block diagram of another embodiment of the separate display system according to the present application. [FIG. 6] is a block diagram of another embodiment of the separate display system according to the present application.

100: Processing device 110: Processing unit 130: low to high unit 200: Display device 210: High to Low Unit 230: Display unit 300: Transmission Line 410: first channel 430: Third channel 510: communication port S1: The first video signal S2: The second video signal S3: The third video signal C1: Control signal C2: Control signal D1: Video data

Claims (8)

A separate display system includes: a processing device, including: a processing unit for generating a first image signal, the first image signal has a first transmission rate and a first number of channels; and a low-to-high a unit for converting the first image signal into a second image signal, the second image signal has a second transmission rate and a second number of channels, the first transmission rate is lower than the second transmission rate, the The number of the first channel is higher than the number of the second channel, the low-to-high unit includes a first conversion circuit and a compression circuit, the first conversion circuit converts the first image signal into a fourth image signal, the fourth The image signal has a fourth transmission rate, the fourth transmission rate is greater than the first transmission rate, the compression circuit compresses the fourth image signal into the second image signal, the second transmission rate is greater than the fourth transmission rate; a The display device includes: a high-to-low unit for receiving and converting the second image signal into a third image signal, the third image signal has a third transmission rate and a third channel number, the high-to-low The unit includes a decompression circuit and a second conversion circuit, the decompression circuit decompresses the second image signal into a fifth image signal, the fifth image signal has a fifth transmission rate, and the fifth transmission rate is less than the second transmission rate, the second conversion circuit converts the fifth image signal into the third image signal, the third transmission rate is lower than the fifth transmission rate; and a display unit for displaying the third image signal ; and a transmission line for connecting the low-to-high unit to the high-to-low unit, one channel number of the transmission line is substantially the same as the second channel number. The separate display system of claim 1, wherein the first channel number is divided by the second channel number as a ratio, and the second transmission rate divided by the first transmission rate is the ratio; the third channel The ratio is the number divided by the second channel number, and the ratio is the second transmission rate divided by the third transmission rate. The separate display system of claim 2, wherein the processing unit generates a control signal, the low-to-high unit combines and converts the first image signal and the control signal into the second image signal, and the high-to-low The unit converts and captures the second image signal to obtain the third image signal and the control signal, and the display unit is used for displaying the third image signal according to the captured control signal. The separate display system of claim 1, wherein the processing unit generates a control signal, the first conversion circuit combines and converts the first image signal and the control signal into the fourth image signal; the second conversion The circuit converts and captures the fifth image signal to obtain the third image signal and the control signal, and the display unit is used for displaying the third image signal according to the captured control signal. The separate display system of claim 1, wherein the display device receives and sends a wake-up signal to the high-to-low unit, and the high-to-low unit converts the wake-up signal into an integrated signal, and the integrated signal has a first There are four channels, the channel number of the transmission line corresponds to the second channel number and the fourth channel number, the low-to-high unit converts the integrated signal into a wake-up control signal, and sends the wake-up control signal to the processing unit, The wake-up control signal has a fifth channel number, the fifth channel number is greater than or equal to the fourth channel number according to the wake-up signal, and the processing unit switches to an operating state after receiving the wake-up control signal. The separate display system of claim 4, wherein the first conversion circuit combines the first image signal and the control signal according to a combining mode, the combining mode is a time sharing mode, a space sharing mode, or Time-sharing and space-sharing mode. A separate display system, comprising: a processing device, comprising: a processing unit for generating a plurality of first image signals, each of the first image signals having a first transmission rate and a first number of channels; and a plurality of A low-to-high unit corresponds to the first image signals one-to-one, each of the low-to-high units is used to convert the corresponding first image signal into a second image signal, and each of the second image signals has a second transmission rate and a second number of channels, each of the first transmission rates is lower than each of the second transmission rates, each of the first number of channels is higher than each of the second number of channels, each of the The low-to-high unit includes a first conversion circuit and a compression circuit, each of the first conversion circuits converts the corresponding first image signal received into a fourth image signal, and each of the fourth image signals has a first image signal. Four transmission rates, each of the fourth rates is greater than each of the first transmission rates, each of the compression circuits compresses the fourth image signal sent by the corresponding first conversion circuit into the second image signal, each of the compression circuits The second transmission rate is greater than each of the fourth transmission rates; a display device comprising: a plurality of high-to-low units, one-to-one corresponding to some of the low-to-high units, and each of the high-to-low units is used for self-corresponding to the The low-to-high unit receives the second image signal and converts the second image signal into a third image signal, each of the third image signals has a third transmission rate and a third number of channels, and each of the high The down conversion unit includes a decompression circuit and a second conversion circuit Each of the decompression circuits decompresses the second image signal into a fifth image signal according to the second image signal sent by the corresponding compression circuit, and each of the fifth image signals has a fifth transmission rate , each of the fifth transmission rates is smaller than each of the second transmission rates, each of the second conversion circuits captures the fifth image signal sent by the corresponding decompression circuit as the third image signal, each The third transmission rate is smaller than each of the fifth transmission rates; and a display unit for displaying the third image signals; and a transmission line for connecting the low-to-high units to the high-to-low units , a channel number of the transmission line corresponds to the sum of the second channel numbers of the second image signals. The split display system of claim 7, wherein each of the first channels is divided by each of the second channels as a ratio, and each of the second transmission rates is divided by each of the first transmission rates is the ratio; the number of each third channel divided by the number of each of the second channels is the ratio, and the ratio of each of the second transmission rates divided by each of the third transmission rates is the ratio.

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