CN103453994A - Color difference test fixture, color difference test interface device and color difference test method - Google Patents

Abstract

The invention relates to a color difference test fixture which is suitable for a color output device which dynamically generates a plurality of analog signals. The switch unit receives and transmits the analog image signal and the analog voltage signal. The conversion unit converts the analog image signal into a digital image signal. The processing unit calculates the working frequency of the analog voltage signal and the working voltage of the digital image signal, and compares the working frequency with a default value to generate a frequency test result and a voltage test result. The output unit outputs the frequency test result and the voltage test result to a display. The color difference test fixture of the invention can take account of the difference of individual color output devices under a stable test environment to adjust the related test conditions.

Description

Color difference test fixture, color difference test interface device and color difference test method

【Technical field】

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

【Background technique】

In the current test technology for color output devices, such as display chips or graphics cards, the most basic test item is the test of the analog image signal of the color output device. Stable analog image signal output means that the color output device can work normally. The premise of operation, and because in the current industrial environment, color output devices are mass-produced on a large scale, often resulting in a large number of devices to be tested, so if the traditional manual testing method is used to test one by one, it will make the test The workload of personnel has become a great burden, so how to improve the testing work of color output devices has become an important issue at present.

In the process of testing the analog video signal of the color output device, because different color output devices have different specifications and functions, it is necessary to test the basic video output signal. In addition, the main purpose of the test is to find out whether there are errors or errors in the transmission of the image output signal of the color output device during operation, so as to further solve or repair related problems, so the test In the process, in addition to setting various test conditions to find errors, it is also necessary to be able to record or display relevant error information, such as recording the test results of the current video output signal, etc., and only by recording and displaying relevant information can the items that have occurred errors be identified Follow up and deal with the cause.

At present, in the relevant testing mechanism for color output devices, it mainly tests the red, green and blue (RGB) three-primary color analog signals of the color output device. The test method is to use the software to play the RGB three-primary color blocks, and then the testers rely on the naked eye and long-term work. The accumulated experience is tested, or the compound detection method is composed of color blocks and numbers, so that the tester can simultaneously input the corresponding digital number to confirm and control the test program.

Since the current test method is to test specific color signals individually by displaying color blocks, the test conditions are mostly fixed, so only specific color blocks can be tested, and the tests are usually performed one by one manually. Although such a testing mechanism is relatively specific in terms of the content and objects to be tested, it is relatively simple in function and testing process, which limits the efficiency and flexibility of the testing work. In addition to the easy limitation of the test objects and functions, since the three primary colors are tested manually, it must rely on the tester's own work experience to operate, and the color difference of the three primary color analog signals is often recognized by the naked eye, which often reduces the efficiency and speed of the test. There are deficiencies, and it is easy to have the risk of missing tests due to the poor mental state and concentration of the testers during the operation, so that the test process cannot generate test breakpoints through the automatic judgment program, and it is also easy to be different due to different testers. Different judgment standards for color differences lead to misjudgment, which in turn affects the stability of product quality.

In addition, the simple test device is also lacking in the function of recording and tracking the occurrence of errors, so that even if the occurrence of errors can be detected, the relevant information or conditions when the errors occur cannot be saved as a reference for debugging or repairing , so that the function of the test device is not perfect.

【Content of invention】

In view of the above problems, the present invention provides a color test fixture for a color output device, a color difference test interface device and a color test method, thereby solving the problem that conventional color test tools and test methods for color output devices cannot take into account the individual color output devices. There are differences in its own characteristics and usage conditions, and the method of manual color testing is not perfect and is prone to test breakpoints.

The color difference test method of the present invention includes the following steps: using an input unit to receive a plurality of analog signals generated by a color output device, correspondingly distinguishing the plurality of analog signals into an analog image signal and an analog voltage signal, and transmitting the analog image The signal and the analog voltage signal are sent to a switch unit; the switch unit receives the analog image signal and the analog voltage signal, and transmits the analog image signal to a conversion unit, and transmits the analog voltage signal to a processing unit; the conversion unit converts the analog image signal into A digital image signal, and transmit the digital image signal to the processing unit; use the processing unit to calculate an operating frequency of the analog voltage signal and an operating voltage of the digital image signal, and use the processing unit to compare the operating frequency with a preset in the processing unit Frequency, and generate a frequency test result, and compare the operating voltage with a preset voltage in the processing unit by the processing unit, and generate a voltage test result; send the frequency test result and the voltage test result to an output unit by the processing unit; And the frequency test result and the voltage test result are output to a display by the output unit.

The color difference test method of the present invention further includes the following steps: using an analog switch of the color difference test fixture to selectively transmit the analog image signal to the conversion unit.

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. The color difference test fixture includes 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, receives the analog signals, and selectively distinguishes the analog signals into an analog image signal and an analog voltage signal. The switch unit is electrically connected to the input unit, and the switch unit receives analog image signals and analog voltage signals. 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 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 an operating 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 working frequency to generate a frequency test result, and compares the preset voltage with the working voltage to generate 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.

In the color difference test fixture of the present invention, the analog image signal includes a red signal, a green signal and a blue signal.

In the color difference test fixture of the present invention, the switch unit includes an analog switch, the analog switch is electrically connected to the conversion unit, and selectively transmits a red signal, a green signal or a blue signal to the conversion unit.

In the color difference test fixture of the present invention, the analog voltage signal is a horizontal scanning voltage signal or a vertical scanning voltage signal.

The color difference test fixture of the present invention further includes 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 output unit are electrically configured on the first circuit board , and the processing unit is electrically configured on the second circuit board.

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, and the interface device includes a circuit board, an input unit, a switch unit, a conversion unit and an output unit. Wherein, the input unit is electrically arranged on the circuit board, the input unit receives the analog signal, and selectively distinguishes the analog signal into an analog video signal and an analog voltage signal, and the analog voltage signal has a working frequency, the switch unit, the electric Set on the circuit board, the switch unit receives and transmits the analog voltage signal and the analog image signal, the conversion unit is electrically arranged on the circuit board, the conversion unit receives the analog voltage signal and the analog image signal, and converts the analog image signal into a digital The image signal, and the digital image signal has an operating voltage, the output unit is electrically arranged on the circuit board, and 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 compares the preset frequency with the working frequency to generate a frequency test result, and compares the preset voltage with the working voltage to generate a voltage test result, and the output unit receives And output frequency test results and voltage test results to the display.

In the interface device of the present invention, the input unit and/or the output unit is a D-SUB connector.

In the interface device of the present invention, the switch unit includes an analog switch, the analog switch is electrically connected to the conversion unit, and selectively transmits the analog video signal to the conversion unit.

The effect of the present invention is that, for the general color output device as the main test object, the color difference test fixture receives multiple analog signal contents of the color output device, and passes through, so that the processing unit can be based on the stored preset frequency and preset The setting of the voltage automatically compares the content of the specific analog signal output by the color output device, and generates comparison and test results. Therefore, it is possible to adjust the relevant test conditions while taking into account the differences of individual color output devices in a stable test environment. At the same time, through the design of automatic testing, the efficiency and stability of testing work are improved, the burden of testers is reduced, and test errors and test breakpoints that are easy to occur during manual operations are avoided. Moreover, the comparison and test results generated by the color difference test fixture and the color difference test method of the present invention can be saved as a reference basis for debugging or repairing.

【Description of drawings】

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

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

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

FIG. 3 is a flow chart of the steps of the color difference testing method according to the first embodiment of the present invention.

FIG. 4 is a flow chart of steps of another color difference testing method according to the first embodiment of the present invention.

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

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

FIG. 7 is a flow chart of the steps of the color difference testing method according to the third embodiment of the present invention.

Description of main component symbols:

10, 10’, 10” Card Edge Connectors

110 first circuit board

120 second circuit board

122 third connection interface

140 switch units

150 conversion units

170 processing units

190 circuit board

20 color output device

40 motherboard

111 first connection interface

121 second connection interface

130 input units

141 analog switch

160 output unit

180 interface device

191 connection interface

30 monitors

【Detailed ways】

Please refer to FIG. 1 to FIG. 3 , FIG. 1 is a three-dimensional schematic diagram of a color difference test fixture 10 according to a first embodiment of the present invention, and FIG. 2 is a schematic circuit block diagram of a color difference test fixture 10 according to a first embodiment of the present invention, and FIG. 3 is a flow chart showing the steps of the color difference testing method according to the first embodiment of the present invention.

The color difference test fixture 10 disclosed in the first embodiment of the present invention is suitable for receiving, converting and transmitting a plurality of analog signals dynamically generated by a color output device 20, and transmitting the color difference test results of the color output device 20 to a display 30 , wherein the color output device 20 may be, but not limited to, a display card or graphics chip built in or externally connected to a motherboard 40 .

The color difference test fixture 10 includes a first circuit board 110 and a second circuit board 120, the first circuit board 110 is electrically configured with an input unit 130, a switch unit 140, a conversion unit 150 and an output unit 160, so that The input unit 130 , the switch unit 140 , the conversion unit 150 and the output unit 160 electrically connected to each other are integrated on the same circuit board to form an interface device 180 for transmitting signals. Moreover, a processing unit 170 is electrically configured 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 has a first connection interface 111, and the second circuit board 120 has a second connection interface 121 and a third connection interface 122, the first connection port 111, the second connection interface 121 and The third connection interface 122 can be but not limited to gold fingers or electrical connectors, such as universal serial bus (universal serial bus, USB) or a combination of pins and sockets, etc., wherein the first connection interface 111 and the second connection The interface 121 is a connection interface that cooperates with each other, such as the combination of the aforementioned pin header and 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, and then 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 main board 40 through the third connection interface 122 configured on the second circuit board 120 The connecting interfaces are inserted into corresponding slots in the form of gold fingers, or connected to each other in the form of a universal serial bus, but not limited thereto. The input unit 130 of the color difference test fixture 10 is electrically connected to the color output device 20 through a signal transmission line, and is electrically connected between the output unit 160 and the display 30 through another signal transmission line.

Please refer to FIG. 2 and FIG. 3, the color difference test fixture 10 receives a plurality of analog signals from the color output device 20 through the input unit 120, and selectively distinguishes these analog signals into an analog video signal and an analog voltage signal, and then The analog video signal and the analog voltage signal are sent to the switch unit 140 (step 201 of FIG. 3 ), wherein the analog video signal can be but not limited to include a red signal, a green signal and a blue signal, and these analog video signals are The red, green and blue (RGB) three-primary-color analog signal output by the color output device 20, as mentioned above, the commonly known test method is to use software to make the color output device play RGB three-primary color blocks, and then test it by the tester Therefore, the analog image signals received by the color difference test fixture 10 of this embodiment can be tested against these analog signals.

Moreover, the analog voltage signal further includes a horizontal scanning voltage signal and a vertical scanning voltage signal. The frequency of the horizontal scanning voltage signal represents the number of times the electron beam of the analog display scans from the left to the right of the image tube per second. Scanning speed is usually expressed in kilohertz (KHz), which is the number of horizontal lines that can be drawn per second. The frequency of the vertical scanning voltage signal represents the number of frames completed by the entire horizontal scan per second. Simply put, it is the number of frames formed per second. The vertical scanning speed is usually expressed in Hertz (Hz). The image formation of a traditional analog display is formed by scanning the electron beam up and down from left to right. When the electron beam scans from the upper left corner of the display to the upper right corner, a horizontal scanning line is completed, and the electron beam moves from left to right. The movement in the horizontal direction is called horizontal scanning. The electron beam scanned to the right must return to the left to scan the next horizontal line, and then repeat the above action from the upper left corner to the lower right corner until the scanning of the entire screen is completed. Only when the electron beam is pulled back to the upper left corner, a vertical scanning of the picture is completed at this time, and the scanning that the scanning lines move down sequentially from top to bottom is called vertical scanning. The higher the horizontal scanning frequency is, the higher the resolution can be. When the horizontal frequency and vertical frequency are higher, the displayed image will be more stable.

Next, the switch unit 140 respectively 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 sends the digital video signal to the processing unit 170 (step 205 in FIG. 3 ). Wherein, when the processing unit 170 respectively 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 an operating frequency of the analog voltage signal and an operating voltage of the digital image signal (steps in FIG. 3 207).

Next, the processing unit 170 compares the operating frequency of the analog voltage signal with the stored preset frequency, and generates a frequency test result. The processing unit 170 compares the stored preset voltage with the operating voltage of the digital image signal, and generates a voltage test result. The processing unit 170 of the present invention can preset different test standards for different objects to be tested, that is, different preset frequencies and preset voltages, and compare the read operating frequency and operating voltage according to these test standards , if the working frequency and working voltage meet the preset frequency and preset voltage settings, the processing unit 170 will generate a test result that passes the test, or if the working frequency and working voltage do not meet the preset frequency and preset voltage settings If determined, the processing unit 170 generates a test result of test failure.

As mentioned above, the processing unit 170 can further output relevant test data, such as the current test standard, and the actually measured signal content at the same time. It is worth noting that the test standard of the present invention, namely the preset frequency and preset voltage, can be a fixed frequency value and voltage value or a frequency range and voltage range, so users can test the content of the standard, Different selections and settings are made according to different needs or conditions in actual applications, and the present invention only uses the preset frequency and preset voltage as the description of this embodiment, but those familiar with this technical field can base on The preset frequency and the preset voltage in the present invention have different specific contents or combinations due to actual use requirements, which are not limited to the implementation aspects of the present invention.

It is worth noting that, in step 209 of the color difference testing method of the present invention, the processing unit 170 can first compare the preset frequency with the working frequency, or the processing unit 170 of the present invention can also compare the preset voltage with the working frequency. Voltage, the order of its comparison processing is not limited to this.

Then, the processing unit 170 transmits the frequency test result and the voltage test result to the output unit 160 respectively (step 209 of FIG. 3 ). Then, 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 to the color output device of the terminal to be tested through the input unit of the color difference test fixture, in addition to receiving a plurality of analog signals output by the color output device, and through the connection For example, through the design and arrangement of different pins on the connector, multiple analog signals can be selectively divided into analog video signals and analog voltage signals. Therefore, the color difference test fixture of the present invention can separately process and test the voltage characteristics and frequency characteristics of the multiple analog signals output by the color output device. Since the voltage and frequency of the analog signals are the basic properties of the analog signal, In this way, it can be widely applied to the testing work of various types of color output devices. It is worth noting 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, and saves the It eliminates the need for manual test procedures for testers to judge color errors based on experience and visual observation, and the color difference test fixture can even record the test results in the processing unit. In this way, it not only reduces the burden of testers to improve test efficiency and accuracy, but also provides related processing of subsequent quality inspection processes through the results of related tests, such as references for maintenance or debugging.

In addition, the display 30 of this embodiment can be a traditional display screen or a monitor, so that the output unit 160 directly outputs the frequency test results and voltage test results to the display 30 for testers to directly know the test results and related data Or, the display 30 of this embodiment can also be a relatively simple display device, such as through the arrangement of traditional light bulbs or light-emitting diodes (LEDs), using different light-emitting states to display whether the color difference test results pass the detection standard, such as through For the configuration of red light and green light, if the color difference test result passes a standard value, the green light will be turned on as a reminder; otherwise, if the test standard is not passed, the red light will be turned on as a reminder, etc., and even further with different lighting The status shows the gap from the detection standard, etc. However, the type of display 30 selected by the user can be selected according to the corresponding output unit 160 according to different requirements or conditions in actual application, and the present embodiment only uses the display 30 as a display screen or The monitor is used as the description of this embodiment, but those who are familiar with this technical field 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 do not The embodiments of the present invention are limited.

Furthermore, the input unit 130 of the color difference test fixture 10 of this embodiment is used to receive the analog signal output by the color output device 20, and the output unit 160 is used to receive the frequency test result and the voltage test result output by the processing unit 170, And this result can be output to the display 30, so the input unit 130 and the output unit 150 of the present embodiment can be respectively a D-SUB connector (or be called the Video Graphics Array (Video Graphics Array, VGA) connector), or Yes, the input unit 130 and the output unit 160 of this embodiment can also be in the form of a Mini-D-SUB connector respectively. 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 analog Voltage signal; while the Mini-D-SUB connector has a total of 15 pins, of which the 1st, 2nd and 3rd pins are selected as analog video signals, and the 13th and 14th pins are selected as 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 in actual applications, and the present invention only uses the input unit 130 and the output unit 160 as D- The SUB connector is used as an illustration of this embodiment, but those familiar with this technical field can make the input unit 130 and output unit 160 of the present invention have different specific types or combinations of connections according to actual use requirements, and selectively The distinction between the analog video signal and the analog voltage signal is not limited to the embodiments of the present invention.

Therefore, the application flexibility of the color difference test fixture of the present invention can be improved by setting different types of input units and output units, so that the color difference test fixture of the present invention can be more widely applicable to different types of color output devices.

In addition, the switch unit 140 provided on the color difference test fixture of the present invention can be a switch assembly or device that has multiple inputs and multiple outputs at the same time, and can achieve different connections and switching functions between multiple inputs and multiple outputs. , such as a multiplexer with multiple sets of input ports and output ports, or the switch unit 140 of the present invention can also be a combination of multiple switches, for example, a combination of a multiplexer and an analog switch, and This combination achieves the connection switching and control of related signal transmission. Personnel familiar with this technical field can make the switch unit described in the present invention have different combinations of specific types or specifications according to actual use requirements, which are not enumerated in the present invention. The implementation form shown is limited.

It can be understood that, in the above embodiments, the analog image signal is converted into a digital image signal through the conversion unit 150, so the conversion unit 150 may be an analog-to-digital converter (Analog-to-Digital Converter, ADC), which is aimed at The sampling, quantization and other processing processes of the continuous analog signal are already well-known technical contents, and will not be repeated here. However, it is worth noting that the analog input form received by the conversion unit 150 in this embodiment may be a single-channel analog input form, or may also be a multi-channel analog input form, but it is not limited thereto. Moreover, the reference input voltage required by the conversion unit 150 of this embodiment when performing analog-to-digital conversion can be generated inside the conversion unit 150, or can also be provided externally, for example, by using the processing unit 170 of the present invention to provide different The reference input voltage is used 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-to-digital converter, or the conversion unit 150 of this embodiment may also be a 16-bit analog-to-digital converter, so after the conversion unit 150 performs analog-to-digital conversion The digital conversion result, that is, the digital image signal, can be a digital signal with a length of 8 bits, or, the digital image signal in this embodiment can also be a digital signal with a length of 16 bits, and the present invention only uses the conversion unit 150 As an illustration of this embodiment, those who are familiar with this technical field can make the conversion unit 150 described in the present invention have different combinations of specific types or specifications according to actual use requirements, and do not use the combinations mentioned in the present invention. Implementation is limited. 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 .

Please refer to Fig. 2, the processing unit 170 of this embodiment has input and output ports for receiving data and transmitting data, and the processing unit 170 of this embodiment has a certain memory space at the same time, stores related data such as test program, for example preset frequency value and voltage value, and the processing unit 170 has more computing and comparison capabilities, therefore, the processing unit 170 of the present embodiment can be a microprocessor (micro processing unit, MPU) or a microcontroller (micro control unit, MCU), or , the processing unit 170 of the present invention can also be a combination of a processing device and a memory device, and the present invention only uses the processing unit 170 as a microcontroller as an illustration of this embodiment, but those who are familiar with this technical field can rely on The processing unit 170 described in the present invention may be combined with different specific types or specifications due to actual use requirements, which are not limited to the embodiments of the present invention.

The color difference test fixture 10 of the present invention provides different test functions and options through different types of processing units 170. For example, different types of processing units 170 can be set correspondingly to the aforementioned 8-bit or 16-bit conversion unit 150 to process specific data types, and the processing unit 170 can provide different reference input voltages to provide different conversion precision of the conversion unit 150, and the processing unit 170 can further provide different test programs for different objects to be tested, such as multiple sets of pre-set Set voltage and preset frequency.

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 integrated circuit, analog IC), or, the present embodiment Although the processing unit 170 cannot directly read the operating frequency of the analog voltage signal, the processing unit 170 of this embodiment can also achieve the effect of equivalent signal sampling through the process of continuously reading the input port of the analog signal, and then judge the analog voltage signal. 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 operating voltage of the digital image signal. Let me repeat; those familiar with this technical field can make the processing unit 170 of the present invention have different specific types or combinations of operations according to actual use requirements, and are not limited to the implementation aspects of the present invention.

In addition, as shown in Figure 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, so that the processing of the color difference test fixture The unit can control the switch unit to selectively disconnect the signal transmission connection of the input unit, the conversion unit and the processing unit, and make the switch unit selectively turn on the input unit and the output unit, and directly output the analog signal output by the color output device through the output The unit is sent to the display for traditional color difference testing. In addition to receiving the analog signal output by the color output device for automatic testing, the color difference test fixture of the present invention is more compatible with the aforementioned traditional test methods.

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

Therefore, the color difference test method disclosed in the first embodiment of the present invention can also selectively disconnect the signal transmission connection between the input unit 130, the conversion unit 150 and the processing unit 170 through the switch unit 140, so that the color output device 20 can After the output analog signal is sent to the switch unit 140 through the input unit 130, it will not be sent to the conversion unit 150 and the processing unit 170, but the input unit 130 and the output unit 160 are selectively turned on by the switch unit 140, and the The analog signal output by the color output device 20 is directly transmitted to the output unit 160 , and then output to the monitor 30 for display by the output unit 160 , and then the tester performs the traditional test work. 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 traditional test methods, providing users with more test options.

Please refer to FIG. 5 , which is a three-dimensional schematic diagram of a color difference test fixture 10' disclosed in the second embodiment of the present invention. The structure of the second embodiment disclosed by the present invention is substantially the same as that of the first embodiment. The difference between the two is that the color difference test fixture 10 ′ disclosed by the second embodiment of the present invention is an input unit 130 , a switch unit 140, the conversion unit 150, the output unit 160 and the processing unit 170 are integrated and configured on the same circuit board 190, and a connection interface 191 is electrically configured on the circuit board 190. The connection interface 191 can be but not limited to gold finger or electric Connector. Therefore, in the application of the color difference test fixture 10', each component on the circuit board 190 can be directly electrically plugged through the connection interface 191 of the circuit board 190 to a corresponding connection on a motherboard equipped with a color output device. The interface is used to carry out the color difference test of the output color of the color output device.

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

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, the difference is that the color difference test fixture 10" of this embodiment mainly receives and processes a plurality of simulated 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 this embodiment further includes an analog switch 141, which is electrically connected to the conversion unit 150, and selectively receives and transmits a red signal, a green signal or a blue signal to Conversion unit 150.

At the same time, the color difference testing method of this embodiment is similar to the color difference testing method of the first example, except that in step 503 of FIG. The analog voltage signal is sent to the processing unit 170 , and the switch unit 140 selectively sends the analog image signal such as red signal, green signal or blue signal to the conversion unit 150 through the analog switch 141 .

The switch unit receives the analog video signal and the analog voltage signal, and transmits the analog voltage signal to the processing unit, and the analog switch selectively transmits the analog video signal to the conversion unit

As mentioned above, the analog input received by the conversion unit 150 of the present invention may be a single-channel analog input, or may also be a multi-channel analog input. The conversion unit 150 that supports multi-channel analog input can receive the analog image signal of red signal, green signal or blue signal at the same time, but if the conversion unit 150 with single-channel analog input, it must pass through the analog switch in the switch unit 140 141 selectively transmits the red signal, the green signal or the blue signal 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 multiple switches. Therefore, the function performed by the analog switch 1421 of the present invention may be one of many functions built in the switch unit 140, or the analog switch 141 of the present invention may also be an independent Switches, persons familiar with this technical field can make the analog switch 141 described in the present invention have different combinations of specific types or specifications according to the actual use requirements, and are not limited to the implementation forms mentioned in the present invention.

The above-mentioned color difference test fixture and color difference test method of the present invention are aimed at a color output device as an object to be tested, especially for testing the analog image signal output by the color output device. The flexible input unit can be connected to various color The output device for testing is also compatible with traditional testing methods to enhance the convenience of use of the color difference test fixture of the present invention. It also has different switching units, conversion units and processing units to simulate images for different applications and testing requirements. The test of the basic characteristics of the signal is not simply a test for a specific color output device and a limited test condition or method. In addition, in order to improve the efficiency and accuracy of the test, the differential test fixture of the present invention is combined with The color difference test method provides user test results and information through the output unit and display, so that users can flexibly use and 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 give full play to the best test performance of the color difference test fixture of the present invention by taking into account the differences of individual color output devices under the premise of stable test work, and at the same time, through the relevant peripheral design The convenience and efficiency of use can be improved, and the application level of the color difference test fixture and the color difference test method can be expanded.

Although the embodiments of the present invention are disclosed as above, they are not intended to limit the present invention. Anyone skilled in the relevant art can use the shapes, structures, and features described in the application scope of the present invention without departing from the spirit and scope of the present invention. and quantity can be slightly changed, so the scope of patent protection of the present invention must be defined by the scope of patent application attached to this specification.

Claims (10)

1. a color difference test method, is characterized in that, described color difference test method comprises the following steps: An input unit receives a plurality of analog signals of a color output device, and correspondingly distinguishes the plurality of analog signals into an analog video signal and an analog voltage signal, and transmits the analog video signal and the analog voltage signal to a switching unit; receiving the analog image signal and the analog voltage signal by the switch unit, transmitting the analog image signal to a conversion unit, and transmitting the analog voltage signal to a processing unit; converting the analog image signal into a digital image signal by the conversion unit, and sending the digital image signal to the processing unit; calculating an operating frequency of the analog voltage signal and an operating voltage of the digital image signal by the processing unit; Using the processing unit to compare the operating frequency with a preset frequency in the processing unit, and generate a frequency test result, and the processing unit transmits the frequency test result to an output unit; comparing the operating voltage with a preset voltage in the processing unit by the processing unit, and generating a voltage test result, and the processing unit sends the voltage test result to the output unit; and The output unit outputs the frequency test result and the voltage test result to a display. 2. color difference test method according to claim 1, is characterized in that, described color difference test method further comprises the following steps: An analog switch of the color difference test fixture is used to selectively transmit the analog image signal to the conversion unit. 3. A color difference test fixture, electrically connected to a display and suitable for a color output device, the color output device dynamically generates a plurality of analog signals, characterized in that the color difference test fixture comprises: an input unit electrically connected to the color output device, the input unit receives the plurality of analog signals, and selectively distinguishes the plurality of analog signals into an analog video signal and an analog voltage signal; a switch unit electrically connected to the input unit, the switch unit receives the analog image signal and the analog voltage signal; a conversion unit electrically connected to the switch unit, the conversion unit converts the analog video signal into a digital video signal; a processing unit electrically connected to the switching 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 the An operating voltage of a digital image signal, wherein the processing unit stores a preset frequency and a preset voltage, the processing unit compares the preset frequency and the operating frequency, and generates a frequency test result, and compares generating a voltage test result for the preset voltage and the working voltage; and An 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. 4 . The color difference test fixture according to claim 3 , wherein the analog image signal includes a red signal, a green signal and a blue signal. 5. The color difference test fixture according to claim 4, wherein the switch unit comprises an analog switch, the analog switch is electrically connected to the conversion unit, and selectively transmits the red signal, the the green signal or the blue signal to the conversion unit. 6. The color difference test fixture according to claim 3, wherein the analog voltage signal is a horizontal scanning voltage signal or a vertical scanning voltage signal. 7. The color difference test fixture according to 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 The unit, the conversion unit and the output unit are electrically configured on the first circuit board, and the processing unit is electrically configured on the second circuit board. 8. An interface device, 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, its characteristics In that, the interface device includes: a circuit board; An input unit is electrically arranged on the circuit board, the input unit receives the plurality of analog signals, and selectively distinguishes the plurality of analog signals into an analog video signal and an analog voltage signal, and the The analog voltage signal has an operating frequency; a switch unit, electrically disposed on the circuit board, the switch unit receives and transmits the analog voltage signal and the analog image signal; A conversion unit, electrically disposed on the circuit board, 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; and an output unit, electrically disposed on the circuit board, and 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 compares the preset frequency with the operating frequency to generate a frequency test result, and compares the preset voltage with the The working voltage generates a voltage test result, and the output unit receives and outputs the frequency test result and the voltage test result to the display. 9. The interface device according to claim 8, wherein the input unit and/or the output unit is a D-SUB connector. 10. The interface device according to 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 video signal to the conversion unit.

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