Method of collecting and measuring impulse current of field electron emission display modulation

A technology of pulse current and field emission, which is applied in the direction of measurement, static indicators and instruments using digital measurement technology, which can solve the problems of time-consuming, cumbersome switching methods, time-consuming and energy-consuming recording, etc.

Inactive Publication Date: 2009-11-25
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

[0004] 2. The measurement requires manual adjustment and human observation, so it takes a lot of time and energy to record the measurement results when performing multi-point measurement
[0005] 3. When performing multi-point measurement, it is ne

Method used

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  • Method of collecting and measuring impulse current of field electron emission display modulation
  • Method of collecting and measuring impulse current of field electron emission display modulation
  • Method of collecting and measuring impulse current of field electron emission display modulation

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Embodiment Construction

[0038] The embodiment of the present invention is based on the universal serial bus (USB) communication to realize the automatic measurement method of command, data and information transmission between the upper computer (PC) and the lower computer (FPGA main control, D / A conversion, acquisition amplifier). The upper computer realizes command / data transmission and measurement status information reception based on the measurement and control interface; the lower computer runs the command / data of the upper computer based on the FPGA, controls the D / A converter, I / O port and acquisition amplifier to perform power adjustment, pulse amplifier output and The multiplexer is switched, and the measurement status information is fed back to the host computer.

[0039] Anode power supply V a The adjustment belongs to the data transmission mode (DTW). The MFC interface of the upper computer sets different anode voltages according to the differences of each display screen. After the settin...

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Abstract

Method of collecting and measuring impulse current of field electron emission display modulation is an automatic measuring and controlling method for measuring field electron emission display modulation. The method is composed of a host computer PC contrl flow 1, a serial bus USB transmission mode 2, a lower computer FPGA main control, D/A conversion, collection amplifier operation flow 3 and collection mode of display measurement drive 4. The host computer sends order/data and receives measurement status information, the serial bus implements handshaking communication, the lower computer operates to receive order/data and send measurement status information, the display measures drive collection by useing spliced power with nine display characteristic points, three channel high-voltage gate impulse drives directly, one channel collection amplifier collects in rows. The host computer measurement and control proceeds measurement selection, theoretical arithmetic, voltage search, precision set and status inquiry, the lower computer main control proceeds gain selection, digital-analog conversion, voltage regulation, circuit switching, impluse drive, signal collection, waveform processing, logic detection and information feedback.

Description

technical field [0001] The invention relates to an automatic measurement method for pulse collection for measuring the modulation performance of a field emission display screen, which belongs to the technical field of field emission flat panel display testing. Background technique [0002] At present, the method of measuring the modulation performance of field emission display screens mainly adopts the direct current measurement method, which is difficult to realize multi-point modulation performance measurement to verify the uniformity and stability of the display screen. Its main disadvantages are as follows: [0003] 1. Because the DC voltage difference between the cathode and the grid causes the cathode emission current to be in a DC state, a larger power supply is required when measuring the modulation performance of a larger cathode current, which is not conducive to the realization of multi-point parallel connection. Measure point by point. [0004] 2. The measureme...

Claims

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Application Information

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IPC IPC(8): G09G3/00G01R19/25
Inventor 杨晓伟李晓华雷威张宇宁王保平
Owner SOUTHEAST UNIV
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