TWI400693B - Method and structure for compensating signal delay - Google Patents

Description

Signal delay compensation method and its architecture

The present invention relates to a signal delay compensation technique for optimizing a compensation signal to allow a display to produce a better image.

As we all know, the three colors of red, green, and blue are called the three primary colors of light (RGB). The colors seen by the human eye are caused by different wavelengths of light. The human eye has the above three kinds of colors. The light wavelength is particularly strong. As long as the intensity of these three kinds of light is properly adjusted, humans can feel almost all colors. Since the mixing of these three kinds of light can almost express all the colors that can be recognized by human eyes, it is generally Color displays often have illumination devices that produce these three basic types of light.

In the case where the standard of the digital interface of the liquid crystal display is not completely uniform, the remote host generally connected to the display (including the liquid crystal display and the conventional image tube display) converts the image and text information into a display chip. The analog signal is then transmitted to the display through the connection line, which not only causes signal attenuation during the information conversion process, but also attenuates the signal strength due to long-distance transmission.

However, in the processing industry or in general daily life, remote video surveillance can greatly improve the convenience of the workflow and the quality of life. Therefore, when performing long-distance signal transmission, only the signal can be optimized. In order to allow the display to produce a clear image.

In view of this, the main object of the present invention is to provide a method for optimizing a compensation signal to enable a display to produce a better image and its related architecture.

In order to achieve the above, the present invention mainly comprises a signal transmission device and a signal compensator to form a signal connection between the remote host and the display; a microprocessor is used to activate the signal transmission device to send a test signal, and the signal compensator The compensation control signal is issued to generate a compensation signal. If there is a delay between the compensation signals, the microprocessor determines the compensation signal with the longest delay time, and fine-tunes the other compensation signals based on the reference signal, thereby making the display more Good image.

Especially in long-distance transmission, there is a delay between various transmission signals (such as R, G, B signals in the video signal), and it is impossible to reach the display synchronously, which is easy to cause blurring of the screen color of the display or color difference. The compensation method of the present invention can be effectively solved.

In order to enable the reviewing committee to clarify the main technical contents of the present invention and the implementation manners, the following description is provided with reference to the following: a method for optimizing the compensation signal by the present invention, so as to enable the display to produce a better image image and The related architecture is composed of a signal transmission device and a signal compensator to form a signal connection between the remote host and the display; a microprocessor is used to activate the signal transmission device to send a test signal and compensate the signal compensator. Controlling the signal to generate a compensation signal. If there is a delay between the compensation signals, the microprocessor determines the compensation signal with the longest delay time, and fine-tunes the other compensation signals based on the reference signal, so that the display produces a better image. Picture.

Therefore, the signal compensation architecture of the present invention, as shown in the first figure, basically includes: a signal transmission device 10, a signal compensator 20, and a microprocessor 30; wherein: the signal transmission device 10 and the signal compensation The device 20 is configured to form a signal connection between the remote host 50 and the display 60, and the signal transmission device 10 is configured to generate a test signal for the signal compensator 20 to generate a compensation signal; the signal compensator 20 is configured to receive the signal transmission The test signal of the device 10 generates a corresponding compensation signal according to the compensation control signal of the microprocessor 30. The microprocessor 30 is configured to activate the signal transmission device 10 to send a test signal, and the signal compensator 20 A compensation control signal is issued to generate a compensation signal, and is used to determine the delay time of each compensation signal and fine-tune it.

Referring to the first and second figures, if the signal compensation method of the present invention includes the following processes in sequence:

First, the microprocessor 30 sends a control signal to the signal transmission device 10. After receiving the control signal, the signal transmission device 10 starts to send the test signals A, B, and C (as shown in the third figure). Each test signal A, B, and C is synchronized without delay.

b. The microprocessor 30 sends an initial compensation control signal to the signal compensator 20, and the signal compensator 20 generates a compensation signal. The microprocessor 30 sends an initial compensation control signal to compensate the signal. The device 20 generates a compensation signal, and there is a delay between the compensation signals A, B, and C (as shown in the third figure).

c. The microprocessor 30 processes the compensation signal to determine which compensation signal has the longest delay time. In the embodiment shown in the third figure, the delay time of the compensation signal C is the most, and The compensation signal is used as a reference, and it is judged whether the delay time of the other compensation signals must be fine-tuned. The judgment method is compared with other compensation signals by using the compensation signal as a reference. If the delay time of other compensation signals is different, then Judging that fine tuning is required.

In the embodiment, the microprocessor 30 determines that the compensation signal C is used as a reference, and the compensation signal C is compared with the compensation signals A and B, wherein the delay times of the compensation signals A, B and the compensation signal C are compared. When there is a difference, and the fine adjustment is needed, the microprocessor 30 sends an adjusted compensation control signal to the signal compensator 20, and repeats step c until the adjusted compensation signals generated by the signal compensator are Synchronize the signal without delay (as shown in the third figure).

In addition, the signal compensation architecture of the invention can also be further disposed between the signal compensator 20 and the microprocessor 30, and the voltage amplifier 40 is used to compensate the signal compensator 20. The signal is amplified for the microprocessor 30 to determine.

Because the present invention is directed to long-distance transmission between the remote host and the display, there is a delay between various transmission signals (such as R, G, and B signals in the video signal), and it is impossible to reach the display synchronously, and the screen color of the display is easy to be made. Defects such as blurring or color difference are generated, and the delay of the signal is finely adjusted to an optimal state by the compensation method of the present invention, thereby allowing the display to produce a better image

As described above, the present invention provides a preferred and feasible signal delay compensation method and related architecture, and an application for an invention patent is provided according to the law; however, the above embodiments and drawings show a preferred embodiment of the present invention. The present invention is not limited thereto, and it should be construed that the structures, devices, features, and the like of the present invention are similar to those of the present invention.

10. . . Signal transmission device

20. . . Signal compensator

30. . . microprocessor

40. . . Voltage amplifier

50. . . Remote host

60. . . monitor

The first figure is a block diagram of the signal delay compensation architecture of the present invention.

The second figure is a flow chart of the operation of the signal delay compensation method in the present invention.

The third figure is the test signal, the compensation signal and the adjusted compensation signal waveform in the present invention.

The fourth figure is another block diagram of the signal delay compensation architecture of the present invention.

Claims (4)

A method for compensating for signal delay is a signal transmission device and a signal compensator forming a signal connection between a remote host and a display, and a microprocessor controls the signal transmission device and the signal compensator, which includes the following steps : a. First, the microprocessor sends a control signal to the signal transmission device, and after receiving the control signal, the signal transmission device starts to send the test signal; b. the initial compensation control signal is sent by the microprocessor to the a signal compensator, and the signal compensator generates a compensation signal, wherein there is a delay between the compensation signals; c. the microprocessor processes the compensation signal to determine which compensation signal has the longest delay time, and thereby The compensation signal is used as a reference, and it is determined whether the delay time of the other compensation signals must be fine-tuned. When fine adjustment is required, an adjusted compensation control signal is sent to the signal compensator, and steps c~d are repeated until the signal compensation Each of the compensation signals generated by the device is a synchronous signal without delay, thereby allowing the display to produce a better image. The method for compensating for the signal delay according to claim 1, wherein the microprocessor compares the compensation signal as the reference with the other compensation signals, and if the delay times of the other compensation signals are different, it is judged that fine adjustment is needed. A signal delay compensation architecture includes: a signal transmission device for generating a test signal for a signal compensator to generate a compensation signal; a signal compensator for receiving a test signal of the signal transmission device and generating a corresponding compensation signal according to the compensation control signal of the microprocessor; a microprocessor for starting the signal transmission device to send a test signal, and The signal compensator sends a compensation control signal to generate a compensation signal for determining the delay time of each compensation signal, and determining the compensation signal with the most delay time, and fine-tuning the other compensation signals based on the reference signal, thereby causing the display to generate A better image. The signal delay compensation architecture of claim 3, wherein a further voltage amplifier is further disposed between the signal compensator and the microprocessor.