A kind of test method of vehicle LCDTechnical field
The present invention relates to a kind of test methods of vehicle LCD.
Background technique
Constantly bringing forth new ideas and develop with social science and technology, client needs more intuitive, modernization car-mounted terminal to show equipmentTo meet the needs of to instant messaging and amusement.Wherein car-mounted terminal shows most importantly vehicle-mounted liquid crystal display in equipmentDevice, before vehicle LCD puts goods on the market, it is necessary to quality to ensure product is tested it, especially for heightThe car-mounted terminal of integrated level shows that equipment carries out systematic testing and stability test becomes more and more important, and traditional at presentIn test method, almost without very easily approach in terms of efficient analysis.
Summary of the invention
Above-mentioned in order to solve, the present invention provides a kind of design scheme of the test method of vehicle LCD.
A kind of test method of vehicle LCD, comprising the following steps: A, initialization: host computer connects liquid crystal displayDevice, and send the power source drive device initialization liquid crystal display on instruction starting liquid crystal display；
B, start test data transmitting step: host computer sends a command to the MCU of liquid crystal display, and MCU judges the instructionWhether it is test command, is to start test data transmission, otherwise continues to execute this step；C, LCD TEST step:Host computer sends instruction to liquid crystal display MCU and carries out screen display test.
The step B is specifically included: when liquid crystal display MCU receives test command, the transmission of starting test data is simultaneouslyImage data to be tested is sent to MCU, image data to be tested is backed up to storage end by MCU.
The step C is specifically included: after image data to be tested is completed to back up, MCU sends image data to be testedDisplay test is carried out to liquid crystal display.
It is described to carry out showing that test specifically includes, it detects the dark bright spot of screen, the combination degree of test screen and iron frame, surveyThe high-frequency data of the display state, test screen of trying screen is shown.
Further include timing control step: when host computer powers on, MCU carries out out-put supply control to power source drive device,And completion is to the power drives of liquid crystal display.
In conclusion the invention has the following advantages: (1) can send a command to MUC, operation letter by host computerJust, practical；(2) the car entertainment display system short for the development cycle, the test method is efficient, convenient, general.
Specific embodiment
In order to allow those skilled in the art that can be best understood from technical solution of the present invention, below to the present invention make intoThe elaboration of one step.
Present invention discloses a kind of test methods of vehicle LCD, comprising the following steps: A, initialization: host computerLiquid crystal display is connected, and sends the power source drive device initialization liquid crystal display on instruction starting liquid crystal display；B, it opensDynamic test data transmitting step: host computer sends a command to the MCU of liquid crystal display, and MCU judges whether the instruction is test lifeIt enables, is to start test data transmission, otherwise continues to execute this step；C, LCD TEST step: host computer is to liquid crystalDisplay MCU sends instruction and carries out screen display test.
When liquid crystal display MCU receives test command, starting test data is transmitted and sends out image data to be testedIt send to MCU, MCU and image data to be tested is backed up into storage end.
After image data to be tested is completed to back up, image data to be tested is sent to liquid crystal display and shown by MCUShow test.It is described to carry out showing that test specifically includes, it detects the dark bright spot of screen, the combination degree of test screen and iron frame, surveyThe high-frequency data of the display state, test screen of trying screen is shown.
In order to guarantee that liquid crystal display works normally, further include timing control step: when host computer powers on, MCU is to electricitySource drive device carries out out-put supply control, and completes the power drives to liquid crystal display.
The present embodiment is more excellent embodiment of the invention, and the part not being described in detail is all made of well known maturationTechnology.It should be noted that without deviating from the spirit and substance of the present invention, those skilled in the art work as canVarious corresponding changes and modifications are made according to the present invention, but these change and modification all should belong to right appended by the present invention and wantThe protection scope asked.