TWI383661B - Display apparatus and test method for the same - Google Patents

Description

Display device and test method therefor

The present invention relates to a display apparatus and a test method for the display apparatus, and more particularly to a display apparatus and a test method capable of testing an output signal of a signal source.

When there is a problem with the image displayed by the display device connected to one of the signal sources, the problematic part may be the display device or the signal source to which the display device is connected. In general, if you want to know that there is a problem with the display device or the signal source, you must use a dedicated test device, or you need to use other signal sources or display devices to cross test, which is very inconvenient for the user. For example, when a computer device in a user's home has a problem with the image displayed on the display device, since the user usually does not have a dedicated test device, and there is no redundant signal source or display device for cross-testing, it is difficult It is the display device or the signal source, such as a display card, that is judged to be problematic.

Accordingly, it is a primary object of the present invention to provide a display device and a test method to solve the above problems.

One aspect of the present invention provides a display device and a test method for the display device, which use a test module to compare target signals and standard signal parameters corresponding to a test pattern, and Generate and display a test result. Therefore, the user only needs to use the display device to correctly test whether the output signal of the signal source is normal, and does not require other testing tools, which is very convenient for the user.

The display device according to an embodiment of the present invention is connected to a signal source, and the display device is operable in a normal display mode and an input signal test mode. The display device comprises a display module and a test module. The display module is configured to receive a plurality of input signals from the signal source and display the input signals. The test module can receive a target signal between the input signals from the signal source. The test module can include a memory for pre-storing a standard signal parameter table corresponding to a test sample. When the signal source is operated to output the test sample, and the display device is operated in an input signal test mode, the test module compares the target signal parameter with the standard signal parameter and generates a test result And displayed on the display module.

A test method according to another embodiment of the present invention is for a display device. The display device is connected to a signal source, and a standard signal parameter table corresponding to a test sample is pre-stored in the display device. When the signal source is operated to output the test sample, and the display device is operated in an input signal test mode, the test method first receives a target signal corresponding to one of the test samples. Then, the test method compares the target signal parameter and the standard signal parameter to generate a test result. Finally, the test method displays the test results.

Therefore, according to the display device and the test method of the present invention, a test module is used to compare the target signal and the standard signal parameter corresponding to a test sample, and a test result is generated and displayed. Therefore, the user only needs to use the display device to correctly test whether the output signal of the signal source is normal, and does not require other testing tools, which is very convenient for the user.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

The present invention provides a display device and a test method for the display device, which use a test module to compare a target signal and a standard signal parameter corresponding to a test sample, and generate and display a test result. Therefore, the user only needs to use the display device to correctly test whether the output signal of the signal source is normal, and does not require other testing tools, which is very convenient for the user. The specific embodiments of the present invention are described in detail below, in order to fully explain the features, the

Referring to FIG. 1A, FIG. 1A is a functional block diagram of a display device 1 according to an embodiment of the present invention. In this embodiment, the display device 1 is connected to a signal source 3, and the display device 1 is capable of being operated in a normal display mode and an input signal test mode. In practical applications, the signal source 3 can be a display card of a personal computer, but is not limited thereto. As shown in FIG. 1A, the display device 1 includes a display module 10 and a test module 12. When the display device 1 is operated in the normal display mode, the display module 10 can receive a plurality of input signals from the signal source 3 and display the input signals. This function is equivalent to the display function of a general display device.

The test module 12 can receive a target signal between the input signals from the signal source 3. In a practical application, the display device 1 can further include a multiplexer 14 coupled between the signal source 3 and the test module 12. The multiplexer 14 can receive the input signals from the signal source 3 and transmit the target signals to the test module 12.

In this embodiment, the test module 12 can include a memory 120 for pre-storing a standard signal parameter table corresponding to a test sample, wherein the standard signal parameter table includes a standard signal parameter. When the signal source 3 is operated to output the test sample, and the display device 1 is operated in the input signal test mode, the test module 12 compares the target signal parameter with the standard signal parameter and generates a test. The result is displayed on display module 10. In practice, the test module 12 can include a central processing unit (CPU) 122, and the test module 12 uses the central processing unit 122 to compare the target signal parameter and the standard signal parameter to generate the test result. . In an actual application, the display module 10 can include an on screen display (OSD) circuit 100, and when the user operates the display device 1 in the input signal test mode, the screen display circuit 100 can be operated to display The test results. In other words, the test result can be displayed on the display module 10 by the screen display circuit 100. Thereby, the user can easily know whether the target signal sent by the signal source 3 is normal.

In an actual application, the test module 12 can further include an analog-to-digital converter (ADC) 124, as shown in FIG. The analog-to-digital converter 124 can be used to determine that the target signal is an analog signal or a digital signal, and convert the target signal into a digital signal test value corresponding to the standard signal parameter according to the determination result, so as to facilitate the subsequent test module 12 The central processing unit 122 compares the target signal parameter with the standard signal parameter.

In practical applications, the test sample can be a white screen video frame, and one of the test samples has a standard signal voltage parameter of 0.7 volts, and the target signal is a red, green, and blue input signal. one. In other words, the target signal can be one of analog signals of red, green, and blue, and the standard voltage parameter corresponding to the target signal of the all-white screen frame is 0.7 volt. If the target signal voltage is lower than 0.7 volts, it is regarded as an abnormal or erroneous input signal. Therefore, when the test module 12 is lower than the standard signal voltage parameter (0.7 volts) than the target signal voltage parameter, the test result indicates an input signal error.

In practical applications, the test sample can also be a digital signal, and one standard signal voltage parameter corresponding to one of the test samples is a voltage parameter having a logic potential value of 1, wherein the digital signal can be an Hsync signal, a Vsync signal, An SCL signal, an SDA signal or a Hot_PLUG signal, but not limited to this. The voltage parameter corresponding to the logic potential value of 1 for different digital signals is different. For example, the voltage parameter corresponding to the logic potential value of Hsync signal may be 3.3 volts, and the logic potential value corresponding to the Vsync signal is 1 voltage. The parameter may be 4 volts, and the voltage parameter corresponding to the logic potential value of 1 for the Hot_PLUG signal may be 5 volts. If the target signal voltage is lower than the corresponding voltage parameter with a logic potential value of 1, it is regarded as an abnormal or erroneous input signal. Therefore, when the test module 12 is lower than the standard signal voltage parameter to the target signal voltage parameter, the test result indicates an input signal error.

Referring to FIG. 1B, FIG. 1B is a schematic diagram of the display device 1 of FIG. 1A further including an application software 16 and a display data channel interface 18. In practical applications, the display device 1 can further include an application software 16 executed in the signal source 3, as shown in FIG. When a user operates the signal source 3 to output the test sample, the application software 16 can simultaneously trigger the display device 1 to enter the input signal test mode. In practice, the user can also use the application software 16 to operate the signal source 3 to output the test sample, such as the all-white screen frame or the digital signal, and simultaneously trigger the display device 1 to enter the input signal test mode to perform a test procedure. As shown in FIG. 1B, in a practical application, the display device 1 may further include a Display Data Channel Command Interface (DDCCI) 18 connected between the signal source 3 and the test module 12 of the display device 1. And the application software 16 can trigger the display device 1 to enter the input signal test mode via the display data channel interface 18. Thereby, the user only needs to operate the application software 16 to perform the entire test procedure, which is quite convenient for the user.

Therefore, the user can correctly test whether the output signal of the signal source 3 is normal by using the display device 1 without using other test tools.

Referring to FIG. 2, and referring to FIG. 1A and FIG. 1B, FIG. 2 is a flow chart showing a test method according to another embodiment of the present invention. In this embodiment, the test method is applied to a display device 1, and the display device 1 is connected to a signal source 3. In practical applications, the signal source 3 can be a display card of a personal computer, but is not limited thereto. The standard signal parameter table corresponding to a test sample is pre-stored in the display device 1, wherein the standard signal parameter table includes a standard signal parameter. .

In practical applications, the display device 1 can be operated in a normal display mode and an input signal test mode. When the display device 1 is operated in the normal display mode, the display module 10 can receive a plurality of input signals from the signal source 3 and display the input signals. This function is equivalent to the display function of a general display device. In practice, the display device 1 can further include a display data channel interface 18 connected between the display device 1 and the signal source 3, and the input signal test mode can be activated by the display data channel interface 18 being triggered.

As shown in FIG. 2, when the signal source 3 is operated to output the test sample, and the display device 1 is operated in an input signal test mode, the test method first performs step S10 to receive the corresponding test sample. One of the target signals. Then, the test method performs step S12 to compare the target signal parameter and the standard signal parameter to generate a test result. Finally, the test method performs step S14 to display the test result. In a practical application, the display device 1 can include a screen display circuit 100 for displaying the input signal test mode and the test result. Thereby, the user can easily know whether the target signal sent by the signal source 3 is normal.

In practical applications, the test sample can be an all-white screen video frame, and one of the test samples has a standard signal voltage parameter of 0.7 volts, and the target signal is one of red, green, and blue input signals. In other words, the target signal can be one of analog signals of red, green, and blue, and the standard voltage parameter corresponding to the target signal of the all-white screen frame is 0.7 volt. If the target signal voltage is lower than 0.7 volts, it is regarded as an abnormal or erroneous input signal. Therefore, when the foregoing step S12 is lower than the standard signal voltage parameter (0.7 volts) than the target signal voltage parameter, the test result indicates an input signal error.

In practical applications, the test sample can also be a digital signal, and one standard signal voltage parameter corresponding to one of the test samples is a voltage parameter having a logic potential value of 1, wherein the digital signal can be an Hsync signal, a Vsync signal, An SCL signal, an SDA signal or a Hot_PLUG signal, but not limited to this. The voltage parameter corresponding to the logic potential value of 1 for different digital signals is different. For example, the voltage parameter corresponding to the logic potential value of Hsync signal may be 3.3 volts, and the logic potential value corresponding to the Vsync signal is 1 voltage. The parameter may be 4 volts, and the voltage parameter corresponding to the logic potential value of 1 for the Hot_PLUG signal may be 5 volts. . If the target signal voltage is lower than the corresponding voltage parameter with a logic potential value of 1, it is regarded as an abnormal or erroneous input signal. Therefore, when the foregoing step S12 is lower than the standard signal voltage parameter than the target signal voltage parameter, the test result indicates an input signal error.

As described above, the test sample can be an analog signal or a digital signal, and the comparison method in step S12 may vary depending on the type of signal. Therefore, in the actual application, the step S12 may further include the step of determining that the target signal is an analog signal or a digital signal, and comparing the target signal parameter and the standard signal parameter according to the determination result to generate the test result.

Compared with the prior art, the display device and the test method for the display device according to the present invention use a test module to compare the target signal and the standard signal parameter corresponding to a test sample, and generate and display a test result. . Therefore, the user only needs to use the display device to correctly test whether the output signal of the signal source is normal, and does not require other testing tools, which is very convenient for the user.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

1. . . Display device

3. . . Signal source

10. . . Display module

12. . . Test module

14. . . Multiplexer

16. . . Application software

18. . . Display data channel interface

100. . . Screen display circuit

120. . . Memory

122. . . Central processing unit

124. . . Analog digital converter

S10-S14. . . Step flow

Figure 1A is a functional block diagram of a display device in accordance with an embodiment of the present invention.

FIG. 1B is a schematic diagram showing the display device of FIG. 1A further including an application software and a display data channel interface.

2 is a flow chart showing a test method according to another embodiment of the present invention.

1. . . Display device

3. . . Signal source

10. . . Display module

12. . . Test module

14. . . Multiplexer

100. . . Screen display circuit

120. . . Memory

122. . . Central processing unit

124. . . Analog digital converter

Claims (16)

A display device is connected to a signal source, the display device being operable in a normal display mode and an input signal test mode, the display device comprising: a display module, the display module is used for Receiving a plurality of input signals from the source of the signal and displaying the input signals; and a test module for receiving a target signal between the input signals from the source of the signal, the test module comprising a memory for Pre-storing a standard signal parameter table corresponding to a test sample; wherein when the signal source is operated to output the test sample, and the display device is operated in the input signal test mode, the test module compares the target signal The parameter and the standard signal parameter, and generate a test result and display on the display module. The display device of claim 1, wherein the display module comprises a screen display circuit, and when a user operates the display device in the input signal test mode, the screen display circuit is operated The test result is displayed. The display device of claim 1, further comprising a multiplexer coupled between the signal source and the test module, the multiplexer for receiving the signal source Wait for the input signal and transmit the target signal to the test module. The display device of claim 1, further comprising an application software executed in the signal source, wherein when a user operates the signal source to output the test sample, the application software simultaneously triggers the display The device enters the input signal test mode. The display device of claim 4, further comprising a display data channel interface, the display data channel interface being connected between the signal source and the display device, wherein the application soft system is connected to the display data channel interface The display device is triggered to enter the input signal test mode. The display device of claim 1, wherein the test module further comprises an analog-to-digital converter, wherein the analog-to-digital converter is configured to determine that the target signal is an analog signal or a digital signal, and according to the The result of the determination converts the target signal into a digital signal test value corresponding to the standard signal parameter. The display device of claim 6, wherein the test sample is an all-white screen video frame, and one of the test samples has a standard signal voltage parameter of 0.7 volts, and the target signal is red, green, and blue. One of the input signals, when the test module is lower than the standard signal voltage parameter to the target signal voltage parameter, the test result indicates an input signal error. The display device of claim 6, wherein the test sample is a digital signal, and the standard signal voltage parameter corresponding to one of the test samples is a voltage parameter having a logic potential value of 1, when the test module is When the target signal voltage parameter is lower than the standard signal voltage parameter, the test result indicates an input signal error. The display device of claim 8, wherein the digital signal is one selected from the group consisting of an Hsync signal, a Vsync signal, an SCL signal, an SDA signal, and a Hot_PLUG signal. A test method for a display device, the display device is connected to a signal source, and a standard signal parameter table corresponding to a test sample is pre-stored in the display device, and when the signal source is operated to output the test sample, And when the display device is operated in an input signal test mode, the test method includes the steps of: receiving a target signal corresponding to the test sample; comparing the target signal parameter and the standard signal parameter to generate a test result; And display the test results. The test method of claim 10, wherein the display device comprises a screen display circuit for displaying the input signal test mode and the test result. The test method of claim 10, wherein the display device comprises a display data channel interface connected between the display device and the signal source, wherein the input signal test mode can be Triggered to start. The test method of claim 10, wherein the step of generating a test result by comparing the target signal parameter and the standard signal parameter is first determining that the target signal is an analog signal or a digital signal, and The determination result is compared to the target signal parameter and the standard signal parameter to generate the test result. The test method of claim 13, wherein the test sample is an analog signal corresponding to an all-white screen video frame, and one of the test samples has a standard signal voltage parameter of 0.7 volt, and the target signal is red. One of the green, blue input signals, when the target signal voltage parameter is lower than the standard signal voltage parameter, the test result indicates an input signal error. The test method of claim 13, wherein the test sample is a digital signal, and one of the standard sample voltage parameters corresponding to the test sample is a voltage parameter having a logic potential value of 1, when the target signal voltage parameter Below the standard signal voltage parameter, the test result indicates an input signal error. The test method of claim 15, wherein the digital signal is one selected from the group consisting of an Hsync signal, a Vsync signal, an SCL signal, an SDA signal, and a Hot_PLUG signal.