TWI510059B - Aberration test fixture and interface device thereof and aberration testing method - Google Patents

Description

Chromatic aberration test fixture, color difference test interface device and color difference test method

The invention relates to a test fixture and a test method, in particular to a color difference test fixture, a color difference test interface device and a color difference test method for testing analog signals of a color output device.

In the current testing techniques for color output devices, such as display chips or graphics cards, the most basic test item is the analog image signal test of the color output device. The stable analog image signal output is a color output device. The premise of operation, and more, because in the current industrial environment, the color output device is mass-produced in a large-scale manner, which often results in a large number of devices to be tested. Therefore, if the test is performed one by one in the traditional manual test mode, the test will be made. The workload of personnel becomes a great burden, so how to improve the testing of color output devices has become an important issue at present.

In the analog video signal test of the color output device, since different color output devices have different specifications and functions, it is necessary to test the basic image output signals. In addition, the main purpose of the test is to find out whether there is any error or error in the transmission of the image output signal during the operation of the color output device, so that the problem can be further solved or repaired, so the test In the process, in addition to setting various test conditions to find errors, it is necessary to record or display relevant error information, such as recording the test results of the current image output signals, etc., by recording and displaying related information, in order to The reason is to track and process.

At present, the relevant test mechanism of the color output device mainly tests the red, green and blue (RGB) three primary color analog signals of the color output device, and the test method is to play RGB three primary color blocks by software, and then the tester relies on the naked eye and long-term work. The accumulated experience is tested, or a combination of color blocks and numbers, allowing the tester to simultaneously enter the corresponding number to confirm and control the test procedure.

Since the current test method is to test a specific color signal in a color block display manner, the test conditions are mostly fixed, so that only specific color block tests can be performed, and the test is usually performed one by one in a manual operation manner. Although the test mechanism is more specific because of the content and object of the test, the function and test process are relatively simple, which limits the efficiency and flexibility of the test work. In addition to the limitations of the objects and functions of the test, since the three primary colors are tested manually, it is necessary to rely on the tester's own work experience, and the color difference of the three primary color analog signals is visually recognized, which often makes the test efficiency and The speed is insufficient, and it is easy to have the risk of missed test because of the mental state and poor concentration of the tester during the operation, so that the test process cannot generate test breakpoints through the automatically judged program, and it is also easy for different testers. Different judgment standards for color differences cause misjudgment, which in turn affects the stability of product quality.

In addition, the simple test device also lacks the function of recording and tracking errors, so that even if the error can be detected, the relevant information or conditions cannot be saved as a reference for debugging or repair. The function of the test device is not perfect.

In view of the above problems, the present invention provides a color test fixture, a color difference test interface device and a color test method for a color output device, thereby solving the conventional color test tool and test method for the color output device, which cannot take into account the individual color output device. The difference in characteristics and usage conditions, and the way in which color testing is performed manually is not perfect and problems such as test breakpoints are easily generated.

The color difference test fixture of the present invention is electrically connected to a display and is suitable for a color output device. The color output device dynamically generates a plurality of analog signals, and the color difference test fixture comprises an input unit, a switch unit, a conversion unit, A processing unit and an output unit. The input unit is electrically connected to the color output device and receives the analog signals, and selectively distinguishes the analog signals as an analog video signal and a analog voltage signal. The switch unit is electrically connected to the input unit, and the switch unit receives the analog video signal and the analog voltage signal. The conversion unit is electrically connected to the switch unit, and the conversion unit converts the analog image signal into a digital image signal. The processing unit is electrically connected to the switching unit and the conversion unit respectively, and the processing unit receives the analog voltage signal and the digital image signal, and calculates one working frequency of the analog voltage signal and one working voltage of the digital image signal, wherein the processing unit further stores a preset The frequency is compared with a preset voltage, the processing unit compares the preset frequency with the operating frequency, and generates a frequency test result, and compares the preset voltage with the operating voltage, and generates a voltage test result. The output unit is electrically connected to the switch unit, the processing unit and the display, respectively, and the output unit outputs the frequency test result and the voltage test result to the display.

The interface device of the present invention is suitable for transmitting and converting a plurality of analog signals dynamically generated by a color output device. The interface device is electrically connected between a processing unit, a display and the color output device. The interface device includes: a circuit board and electrical An input unit, a switch unit, a conversion unit and an output unit disposed on the circuit board. The input unit receives the plurality of analog signals, and selectively distinguishes the analog signals as an analog video signal and a analog voltage signal, and the analog voltage signal has an operating frequency. The switching unit receives and transmits analog voltage signals and analog video signals. The conversion unit receives the analog voltage signal and the analog image signal, and converts the analog image signal into a digital image signal, and the digital image signal has an operating voltage. The output unit is electrically connected to the switch unit, the processing unit and the display, wherein the processing unit stores a preset frequency and a preset voltage, and the processing unit generates a frequency test result by comparing the preset frequency with the working frequency, and compares the preset The voltage and the operating voltage generate a voltage test result, and the output unit receives and outputs the frequency test result and the voltage test result to the display.

The color difference test method of the present invention comprises the steps of: receiving an analog signal generated by a color output device by an input unit, and classifying the plurality of analog signals into an analog video signal and a analog voltage signal, and transmitting the analog image. The signal and the analog voltage signal are connected to a switch unit; the switch unit receives the analog video signal and the analog voltage signal, and transmits the analog video signal to a conversion unit, and transmits the analog voltage signal to a processing unit; and converts the analog video signal by the conversion unit. a digital image signal, and transmitting the digital image signal to the processing unit; the processing unit calculates one of the working frequency of the analog voltage signal and the working voltage of the digital image signal, and compares the working frequency with the processing unit and one of the processing units Frequency, and a frequency test result is generated, and the processing unit compares the working voltage with a preset voltage in the processing unit, and generates a voltage test result; and the processing unit transmits the frequency test result and the voltage test result to an output unit; And testing the output with the output unit output frequency With the voltage test results to a display.

The function of the color difference test fixture and the color difference test method of the present invention is that, for a general color output device as a main test object, a plurality of analog signal contents of the color output device are received by the color difference test fixture, and the processing unit can be The stored preset frequency and the preset voltage are automatically compared with the specific analog signal output by the color output device, and the comparison and test results are generated, so that the individual color output device itself can be considered in a stable test environment. Differences, while adjusting the relevant test conditions, and also through the design of the automatic test, improve the efficiency and stability of the test work, reduce the burden on the tester, and avoid the test errors and test breakpoints that are easy to occur during human operation. Moreover, the comparison and test results produced by the color difference test fixture of the present invention and the color difference test method can be saved as a reference for debugging or repair.

The features, implementations, and utilities of the present invention are described in detail below with reference to the drawings.

Please refer to FIG. 1 to FIG. 3 . FIG. 1 is a perspective view of a color difference test fixture 10 according to a first embodiment of the present invention, and FIG. 2 is a circuit diagram of a color difference test fixture 10 according to a first embodiment of the present invention. The block diagram, and FIG. 3 is a flow chart showing the steps of the chromatic aberration test method of the first embodiment of the present invention.

The color difference test fixture 10 disclosed in the first embodiment of the present invention is adapted to receive, convert, and transmit a plurality of analog signals dynamically generated by a color output device 20, and transmit the color difference test results of the color output device 20 to a display 30. Wherein the color output device 20 can be, but is not limited to, built-in or externally connected to a motherboard A display card or graphics chip on the 40.

The chromatic aberration test fixture 10 includes a first circuit board 110 and a second circuit board 120. The first circuit board 110 is electrically disposed with an input unit 130, a switch unit 140, a conversion unit 150, and an output unit 160. The input unit 130, the switching unit 140, the conversion unit 150, and the output unit 160, which are electrically connected to each other, are integrated on the same circuit board to constitute an interface device 180 for transmitting signals. Moreover, a processing unit 170 is electrically disposed on the second circuit board 120, and the processing unit 170 stores a preset frequency and a preset voltage.

In addition, the first circuit board 110 further has a first connection interface 111, and the second circuit board 120 further has a second connection interface 121 and a third connection interface 122. The first connection interface 111 and the second connection interface 121 are The third connection interface 122 can be, but is not limited to, a gold finger or an electrical connector, such as a universal serial bus (USB) or a combination of a pin header and a socket, etc., wherein the first connection interface 111 and the second connection interface The connection interface 121 is a mating connection interface, for example, the combination of the pin header and the socket, so that the second circuit board 120 can be electrically connected to the first connection interface 111 of the first circuit board 110 through the second connection interface 121. The processing unit 170 is electrically connected to the input unit 130, the switch unit 140, the conversion unit 150, and the output unit 160.

When the color difference test fixture 10 is applied to the color difference test of the color output device 20, the color difference test fixture 10 can be electrically inserted on the motherboard 40 through the third connection interface 122 disposed on the second circuit board 120. The connection interfaces are, for example, inserted in the corresponding slots in the form of a gold finger, or are connected to each other in the form of a universal serial bus bar, but are not limited thereto. The input unit 130 of the color difference test fixture 10 is provided by one The signal transmission line is electrically connected to the color output device 20, and is electrically connected between the output unit 160 and the display 30 by another signal transmission line.

Referring to FIG. 2 and FIG. 3, the color difference test fixture 10 receives the plurality of analog signals of the color output device 20 through the input unit 120, and selectively distinguishes the analog signals into an analog video signal and a analog voltage signal, and then The analog video signal and the analog voltage signal are transmitted to the switch unit 140 (step 201 of FIG. 3), wherein the analog video signal can be, but is not limited to, including a red signal, a green signal, and a blue signal, such analog images. The signal is the red, green and blue (RGB) three primary color analog signals output by the color output device 20. As described above, the conventional test method is to enable the color output device to play RGB three primary color blocks by software, and then by the tester. The detection is performed, so that the analog video signal received by the color difference test fixture 10 of the embodiment can be tested for the analog signals.

Moreover, the analog voltage signal further includes a horizontal scan voltage signal and a vertical scan voltage signal. The frequency of the horizontal scan voltage signal represents the number of times the analog display electron beam scans from the left side of the image tube to the right side of the image tube. The speed of the scan is usually expressed in kilohertz (KHz), which is the number of horizontal lines that can be drawn per second. The frequency of the vertical scan voltage signal represents the number of frames completed by all horizontal scans per second, which is simply the number of frames formed per second. The vertical scan speed is usually expressed in Hertz (Hz). The image of the traditional analog display is formed by scanning the electron beam up and down. When the electron beam is scanned from the upper left corner of the display to the upper right corner, a horizontal scanning line is completed, and the electron beam is horizontally from left to right. The movement is called horizontal scanning, and the electron beam scanned to the right must be folded back to the left for scanning of the next horizontal line, and then the above action is repeated from the upper left corner to the lower right corner. After the scanning of the entire screen is completed, the electron beam is pulled back to the upper left corner, and a vertical scanning picture is completed at this time, and the scanning of the scanning line from the top to the bottom is called vertical scanning. The higher the horizontal scanning frequency, the higher the resolution, and the higher the horizontal and vertical frequencies, the more stable the displayed image will be.

Then, the switch unit 140 receives the analog video signal and the analog voltage signal from the input unit 130, and transmits the analog video signal to the conversion unit 150 and the analog voltage signal to the processing unit 170 (step 203 of FIG. 3). After receiving the analog video signal from the switch unit 140, the conversion unit 150 converts the analog video signal into a digital video signal, and transmits the digital video signal to the processing unit 170 (step 205 of FIG. 3). After the processing unit 170 receives the analog voltage signal from the switch unit 140 and the digital image signal from the conversion unit 150, the processing unit 170 calculates one of the operating voltage of the analog voltage signal and the operating voltage of the digital image signal (Fig. 3) Step 207).

Then, the processing unit 170 compares the operating frequency of the analog voltage signal with the preset frequency stored therein, and generates a frequency test result. The processing unit 170 generates a voltage test result more than the operating voltage of the preset voltage and the digital image signal stored thereon. The processing unit 170 of the present invention may preset different test standards for different objects to be tested, that is, different preset frequencies and preset voltages, and compare the read working frequency and the working voltage according to the test standards. If the working frequency and the working voltage meet the preset frequency and the preset voltage setting, the processing unit 170 generates a test result that passes the test, or if the working frequency and the working voltage do not meet the preset frequency and the preset voltage setting, the processing is performed. Unit 170 produces a test result that failed the test.

As described above, the processing unit 170 can simultaneously output relevant test data, such as the current test standard, and the actually measured signal content. It should be noted that the test standard of the present invention, that is, the preset frequency and the preset voltage, may be a fixed frequency value and a voltage value or a frequency range and a voltage range, so the user can test the content of the standard. Different choices and settings are made according to different requirements or conditions in actual application, and the present invention only uses the preset frequency and the preset voltage as the description of the embodiment, but those who are familiar with the technical field may be based on actual conditions. The specific content or combination of the preset frequency and the preset voltage according to the present invention is not limited to the embodiment of the present invention.

It should be noted that, in the step 209 of the color difference testing method of the present invention, the processing unit 170 may first compare the preset frequency with the operating frequency, or the processing unit 170 of the present invention may first compare the preset voltage with the working. The voltage, which is the order of the comparison processing, is not limited thereto.

Then, the processing unit 170 transmits the frequency test result and the voltage test result to the output unit 160 (step 209 of FIG. 3). After receiving the frequency test result and the voltage test result, the output unit 160 further outputs the frequency test result and the voltage test result to the display 30, so that the tester can view the color difference test result through the display (step 211 of FIG. 3).

Based on the above, the effect of the present invention is that the tester can connect the input unit of the color difference test fixture to the color output device of the terminal to be tested, in addition to receiving the plurality of analog signals output by the color output device, and The setting, for example, through the design and arrangement of different pins on the connector, selectively distinguishes the plurality of analog signals into analog video signals and analog voltage signals. Therefore, the color of the present invention The differential test fixture can separately process and test the voltage characteristics and frequency characteristics of the plurality of analog signals outputted by the color output device respectively. Since the voltage and frequency of the analog signal are the basic properties of the analog signal, the wide test can be performed. Used for testing of different types of color output devices. It should be noted that the color difference test fixture of the present invention allows the color difference test fixture to automatically perform the color difference test procedure through the configuration and synergy of the input unit, the switch unit, the conversion unit, the output unit, and the processing unit, thereby eliminating the need for the color difference test program. The tester manually and manually observes the manual test procedure for judging the color error, and the color difference test fixture can record the test result in the processing unit. In this way, not only the burden of the tester is reduced, but also the test efficiency and correctness are improved, and the subsequent quality inspection process can be provided by the result of the relevant test, for example, as a reference for maintenance or debugging.

In addition, the display 30 of the embodiment can be a conventional display screen or a monitor, so that the output unit 160 directly outputs the frequency test result and the voltage test result to the display 30 for the tester to directly know the test result and related data. Or, the display 30 of the embodiment may be a relatively simple display device, for example, through a conventional light bulb or a light emitting diode (LED) setting, using different light emitting states to display whether the color difference test result passes the detection standard, for example, through The configuration of the red light and the green light, if the color difference test result passes a standard value, the green light is used as a prompt. Conversely, if the test standard is not passed, the red light is used as a prompt, and the light may be further illuminated. The state appears to deviate from the gap in the detection criteria. However, the type of the display 30 selected by the user may be differently selected according to the corresponding output unit 160 when the actual application is used for different needs or conditions, and the embodiment only uses the display 30 as a display screen or Is the monitor as the real thing For the description of the embodiments, those skilled in the art can make the display 30 and the corresponding output unit 160 of the present invention have different specific types or combinations of devices according to actual use requirements, and are not in accordance with the present invention. The implementation is limited.

Furthermore, the input unit 130 of the color difference test fixture 10 of the embodiment is configured to receive the analog signal output by the color output device 20, and the output unit 160 is configured to receive the frequency test result and the voltage test result output by the processing unit 170. And the output unit 130 and the output unit 150 of the embodiment may be a D-SUB connector (or a Video Graphics Array (VGA) connector), or The input unit 130 and the output unit 160 of the embodiment may also be a type of a Mini-D-SUB connector. It is worth noting that the D-SUB connector has a total of 15 pins, of which the 2nd, 5th and 9th pins are selected as analog video signals, and the 3rd and 12th pins are selected as analogies. The voltage signal; the Mini-D-SUB connector has a total of 15 pins, wherein the first, second and third pins are selected as analog video signals, and the 13th and 14th pins are selected. Analog voltage signal. The user can make different selections and settings for the types of the input unit 130 and the output unit 160 according to different requirements or conditions of the actual application, and the present invention only uses the input unit 130 and the output unit 160 as D-SUB respectively. The connector is used as the description of the embodiment. However, those skilled in the art can make the input unit 130 and the output unit 160 of the present invention have different specific types or combinations of connections according to actual use requirements, and select regions. The classification is smaller than the image signal and the analog voltage signal, and is not limited to the embodiment of the present invention.

Therefore, the color difference test fixture of the present invention can be set by inputting different types of input sheets. The element and the output unit are used to enhance the application flexibility, so that the color difference test fixture of the present invention can be more widely applied to different types of color output devices.

In addition, the switch unit 140 provided on the color difference test fixture of the present invention may be a switch element or device having multiple inputs and multiple outputs at the same time, and capable of achieving different connection and switching functions between multiple inputs and multiple outputs. For example, a multiplexer having multiple sets of input ports and output ports, or the switch unit 140 of the present invention may also be a combination of a plurality of switches, for example, including a combination of a multiplexer and an analog switch, and This combination achieves the connection switching and control of the related signal transmission. Those skilled in the art can make the switch unit of the present invention have different specific types or combinations of specifications according to actual use requirements, and is not in accordance with the present invention. The implementation is limited.

It can be understood that, in the above embodiment, the analog video signal is converted into a digital video signal by the converting unit 150, so the converting unit 150 can be an analog-to-digital converter (ADC), which is continuous. The sampling, quantification and other processes performed by analog signals are well known in the art and will not be described here. It should be noted that the analog input form received by the conversion unit 150 of the embodiment may be a single channel analog input form, or may be a multi-channel analog input form, but is not limited thereto. Moreover, the reference input voltage required by the conversion unit 150 of the present embodiment for analog-to-digital conversion may be generated inside the conversion unit 150, or may be externally provided, for example, by the processing unit 170 of the present invention. The reference input voltage is provided to provide different conversion precision of the conversion unit 150. In addition, the conversion unit 150 of this embodiment may be an 8-bit analog digital converter, or, the implementation For example, the conversion unit 150 can also be a 16-bit analog-to-digital converter. Therefore, the conversion unit 150 performs the analog-to-digital conversion result, that is, the digital image signal, which can be an 8-bit length digital signal, or The digital video signal of this embodiment may also be a 16-bit length digital signal, and the present invention is only the conversion unit 150 as the description of the embodiment, but those skilled in the art can use the actual use. The conversion unit 150 of the present invention is required to have different specific types or combinations of specifications, and is not limited to the embodiments of the present invention. At the same time, the color difference test fixture 10 of the present invention also provides different test functions and options through different types of conversion units 150.

Referring to FIG. 2, the processing unit 170 of the present embodiment has an input/output port for receiving data and transmitting data, and the processing unit 170 of the embodiment has a certain memory space, and stores related information such as a test program, for example, a preset frequency value. The processing unit 170 of the present embodiment may be a micro processing unit (MPU) or a micro control unit (MCU). The processing unit 170 of the present embodiment may be a micro processing unit (MPU) or a micro control unit (MCU). Or, the processing unit 170 of the present invention may also be a combination of a processing device and a memory device, and the present invention is only a description of the processing unit 170 as a microcontroller, but those skilled in the art, The processing unit 170 of the present invention may have different specific types or combinations of specifications according to actual use requirements, and is not limited to the embodiments of the present invention.

The color difference test fixture 10 of the present invention provides different test functions and selections through different types of processing units 170. For example, different types of processing units 170 can be correspondingly disposed with respect to the aforementioned 8-bit or 16-bit conversion unit 150. Processing a particular data type, and processing unit 170 can provide different reference input voltages To provide different conversion precisions of the conversion unit 150, the processing unit 170 can further provide different test programs for different objects to be tested, such as multiple sets of preset voltages and preset frequencies.

In the color difference test method of the present invention, the processing unit 170 can directly receive and read the operating frequency of the analog voltage signal. For example, the processing unit 170 can be an analog integrated circuit (analog IC), or, in this embodiment. Although the processing unit 170 cannot directly read the operating frequency of the analog voltage signal, the processing unit 170 of the embodiment can achieve the effect of the equivalent signal sampling by the program for continuously reading the input signal of the analog signal, and further determine Analogous to the operating frequency of the voltage signal, and the processing unit 170 of the present invention can directly receive the digital image signal, and thereby calculate the working voltage of the digital image signal, and the calculation manner is a commonly used technical means, which is a well-known technology. The processing unit 170 of the present invention may have different specific types or combinations of operations according to the actual use requirements, and is not limited to the embodiment of the present invention. .

In addition, as shown in FIG. 4, in the application of the color difference test fixture disclosed in the first embodiment of the present invention, the user can selectively switch to another color difference test method to process the color difference test fixture. The unit can control the switch unit to selectively disconnect the input signal, the conversion unit, and the signal transmission connection of the processing unit, and enable the switch unit to selectively turn on the input unit and the output unit, and directly output the analog signal output by the color output device via the output unit. Transfer to the display for traditional chromatic aberration testing. The color difference test fixture of the present invention can be automatically tested in addition to the analog signal outputted by the color output device, and the color difference test method of the present invention It has a test method that is more compatible with the aforementioned tradition.

Step 301 of FIG. 4 is similar to step 201 of FIG. 3, the input unit receives a plurality of analog signals, and selectively distinguishes the plurality of analog signals into an analog video signal and a analog voltage signal, in FIG. 4 In step 303, the processing unit generates a first control signal and transmits the first control signal to the switch unit. In step 305 of FIG. 4, the switch unit directly transmits the analog video signal and the analog voltage signal to the output according to the first control signal. The unit; and in step 307 of FIG. 4, the output unit outputs analog image signals and analog voltage signals to the display.

Therefore, in the chromatic aberration testing method disclosed in the first embodiment of the present invention, the switching unit 140 selectively disconnects the signal transmission connection between the input unit 130 and the converting unit 150 and the processing unit 170, so that the color output device 20 After the output analog signal is transmitted to the switch unit 140 via the input unit 130, it is not transmitted to the conversion unit 150 and the processing unit 170, but the switch unit 140 selectively turns on the input unit 130 and the output unit 160 to color The analog signal outputted by the output device 20 is directly transmitted to the output unit 160, and after being output to the display 30 by the output unit 160, the tester performs a conventional test operation. Therefore, the color difference test fixture 10 of the present invention not only has the function of automatic test, but also can be compatible with the aforementioned conventional test mode, and provides users with more test options.

Please refer to FIG. 5, which is a perspective view of a color difference test fixture 10' according to a second embodiment of the present invention. The second embodiment of the present invention is substantially the same as the first embodiment. The difference between the two is that the color difference test fixture 10' disclosed in the second embodiment of the present invention is an input unit 130 and a switch unit. The conversion unit 150, the output unit 160, and the processing unit 170 are integrally configured on the same circuit board 190. A connection interface 191 is electrically disposed on the circuit board 190. The connection interface 191 can be, but is not limited to, a gold finger or an electrical connector. Therefore, in the application of the color difference test fixture 10', the components on the circuit board 190 can be directly inserted through the connection interface 191 of the circuit board 190 to the corresponding connection interface on a motherboard on which the color output device is disposed. To perform color difference test of the color output by the color output device.

Please refer to FIG. 6 and FIG. 7 , FIG. 6 is a circuit block diagram of a color difference test fixture according to a third embodiment of the present invention, and FIG. 7 is a color difference test method according to a third embodiment of the present invention. Step flow chart.

The color difference test fixture 10" disclosed in the third embodiment of the present invention is similar to the color difference test fixture 10 of the first embodiment, except that the color difference test fixture 10" of the present embodiment mainly receives and processes a plurality of analogies. A red signal, a green signal, and a blue signal of the image signal. Therefore, as shown in FIG. 6, the switch unit 140 of the embodiment further includes an analog switch 141. The switch 141 is electrically connected to the switch unit 150, and selectively receives and transmits a red signal, a green signal, or a blue signal. To the conversion unit 150.

In the meantime, the color difference test method of the embodiment is similar to the content of the color difference test method of the first example, and the difference is that in step 503 of FIG. 7, the switch unit 140 receives the analog image signal and the analog voltage signal from the input unit 130, respectively. And transmitting the analog voltage signal to the processing unit 170, and the switching unit 140 selectively transmits the analog video signal such as a red signal, a green signal or a blue signal to the conversion unit 150 through the analog switch 141.

As described above, the analog input received by the conversion unit 150 of the present invention can It is a single channel analog input, or it can be a multichannel analog input. The conversion unit 150 supporting the multi-channel analog input can receive the analog video signal of the red signal, the green signal or the blue signal at the same time, and if it is the single-channel analog input conversion unit 150, it must pass through the analog switch 141 in the switch unit 140. Optionally, the red signal, the green signal or the blue signal is transmitted to the conversion unit 150 one by one. It can be understood that the switch unit 140 of the present invention may be a single device, or the switch unit 140 of the present invention may also be a combination of a plurality of switches. Therefore, the function performed by the analog switch 1421 of the present invention may be one of a plurality of functions built into the switch unit 140, or the analog switch 141 of the present invention may also be an independent one of the switch units 140. The switch, which is familiar to those skilled in the art, may have different combinations of specific types or specifications according to the actual use requirements, and is not limited to the embodiments of the present invention.

The color difference test fixture and the color difference test method of the present invention are directed to a color output device as an object to be tested, in particular, for an analog image signal outputted by a color output device, and an elastic input unit can be connected to various colors. The output device is tested and is also compatible with the traditional test method to improve the ease of use of the color difference test fixture of the present invention, and also has different switch units, conversion units and processing units to be analogized for different applications and test requirements. Testing of the basic characteristics of video signals, rather than simply testing for specific color output devices and defined test conditions or methods. In addition, in order to improve the efficiency and correctness of the test, the differential test fixture of the present invention The color difference test method provides user test results and information through the output unit and the display, so that the user can more flexibly use or even expand the application and efficacy of the color difference test fixture and the color difference test method of the present invention.

Therefore, the color difference test fixture and the color difference test method of the present invention can take advantage of the difference of the individual color output devices themselves to achieve the best test performance of the color difference test fixture of the present invention before the stable test work, and also through the relevant peripheral design. It can improve the convenience and efficiency of use, and can extend the application level of the color difference test fixture and the color difference test method.

Although the embodiment of the present invention is disclosed above, it is not intended to limit the present invention. Therefore, the switch test device of the present invention is not limited to the type disclosed in the embodiment, and any skilled person is not involved. The scope of the invention, the scope of the invention, and the scope of the invention are subject to the scope of the invention as set forth in the appended claims. The definition is subject to change.

10, 10', 10" ‧ ‧ chromatic aberration test fixture

110‧‧‧First board

111‧‧‧First connection interface

120‧‧‧second board

121‧‧‧Second connection interface

122‧‧‧ third connection interface

130‧‧‧Input unit

140‧‧‧Switch unit

141‧‧‧ analog switch

150‧‧‧Transfer unit

160‧‧‧Output unit

170‧‧‧Processing unit

180‧‧‧Interface device

190‧‧‧ circuit board

191‧‧‧Connection interface

20‧‧‧Color output device

30‧‧‧ display

40‧‧‧ motherboard

Fig. 1 is a perspective view showing a color difference test fixture according to a first embodiment of the present invention.

2 is a circuit block diagram of a color difference test fixture according to a first embodiment of the present invention.

Figure 3 is a flow chart showing the steps of the color difference test method of the first embodiment of the present invention.

Figure 4 is a flow chart showing the steps of another color difference test method according to the first embodiment of the present invention.

Fig. 5 is a perspective view showing a color difference test fixture according to a second embodiment of the present invention.

Fig. 6 is a circuit block diagram showing a color difference test fixture according to a third embodiment of the present invention.

Figure 7 is a flow chart showing the steps of the color difference test method of the third embodiment of the present invention.

10‧‧‧chromaticity test fixture

110‧‧‧First board

111‧‧‧First connection interface

120‧‧‧second board

121‧‧‧Second connection interface

122‧‧‧ third connection interface

130‧‧‧Input unit

140‧‧‧Switch unit

150‧‧‧Transfer unit

160‧‧‧Output unit

170‧‧‧Processing unit

180‧‧‧Interface device

Claims (10)

A color difference test method includes the steps of: receiving an analog signal of a color output device by an input unit, and correspondingly distinguishing the plurality of analog signals into an analog video signal and a analog voltage signal, and transmitting the analog video signal and The analog signal is connected to the switch unit; the switch unit receives the analog video signal and the analog voltage signal, and transmits the analog video signal to a conversion unit, and transmits the analog voltage signal to a processing unit; Converting the analog image signal to a digital image signal, and transmitting the digital image signal to the processing unit; and calculating, by the processing unit, an operating frequency of the analog voltage signal and a working voltage of the digital image signal; Comparing the operating frequency with a preset frequency in the processing unit, and generating a frequency test result, and the processing unit transmits the frequency test result to an output unit; the processing unit compares the working voltage with the processing unit One of the preset voltages, and generates a voltage test result, and the processing unit The voltage test result sent to the output unit; and in that the output unit outputs the frequency to the voltage test result a test result to the display. The color difference test method of claim 1, further comprising the step of: selectively transmitting the analog image signal to the conversion unit by using an analog switch of the color difference test fixture. A color difference test fixture electrically connected to a display and adapted to a color output device, the color output device dynamically generating a plurality of analog signals, the color difference test fixture comprising: an input unit electrically connected to the color output device The input unit receives the analog signals and selectively distinguishes the analog signals as an analog video signal and a analog voltage signal; a switch unit electrically connected to the input unit, the switch unit receives the analog video signal And the conversion unit is electrically connected to the switch unit, the conversion unit converts the analog image signal into a digital image signal; a processing unit is electrically connected to the switch unit and the conversion unit, respectively The processing unit receives the analog voltage signal and the digital image signal, and calculates an operating frequency of the analog voltage signal and a working voltage of the digital image signal, wherein the processing unit stores a preset frequency and a preset voltage, the processing unit The unit compares the preset frequency with the operating frequency and generates a frequency test result And generating a voltage test result corresponding to the preset voltage and the working voltage; and an output unit electrically connected to the switch unit, the processing unit and the display, respectively, the output unit outputs the frequency test result and the Voltage test results to the display. The color difference test fixture of claim 3, wherein the analog image signal comprises a red signal, a green signal, and a blue signal. The color difference test fixture of claim 4, wherein the switch unit comprises a An analog switch, the analog switch is electrically connected to the conversion unit, and selectively transmits the red signal, the green signal or the blue signal to the conversion unit. The color difference test fixture of claim 3, wherein the analog voltage signal is a horizontal scan voltage signal or a vertical scan voltage signal. The chromatic aberration test fixture of claim 3, further comprising a first circuit board and a second circuit board electrically connected to the first circuit board, the input unit, the switch unit, the conversion unit, and the The output unit is electrically disposed on the first circuit board, and the processing unit is electrically disposed on the second circuit board. An interface device, configured to transmit and convert a plurality of analog signals dynamically generated by a color output device, the interface device being electrically connected between a processing unit, a display and the color output device, the interface device comprising: a circuit An input unit electrically disposed on the circuit board, the input unit receiving the analog signals, and selectively distinguishing the analog signals as an analog video signal and a analog voltage signal, and the analog voltage signal has a switching frequency, electrically disposed on the circuit board, the switching unit receives and transmits the analog voltage signal and the analog image signal; a conversion unit is electrically disposed on the circuit board, and the conversion unit receives The analog signal is compared with the analog image signal, and the analog image signal is converted into a digital image signal, and the digital image signal has an operating voltage; and an output unit is electrically disposed on the circuit board and electrically connected The switch unit, the processing unit and the display; wherein the processing unit stores a preset Rate with a predetermined voltage, and where The unit generates a frequency test result corresponding to the preset frequency and the operating frequency, and generates a voltage test result corresponding to the preset voltage and the working voltage, and the output unit receives and outputs the frequency test result and the voltage test result. To the display. The interface device of claim 8, wherein the input unit and/or the output unit is a D-SUB (D-subminiature) connector. The interface device of claim 8, wherein the switch unit comprises an analog switch, the analog switch is electrically connected to the conversion unit, and selectively transmits the analog image signal to the conversion unit.