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

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...

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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 necessary to manually switch the electrode connection relative to the position displayed on the screen, and the ammeter and voltmeter need to be connected during the measurement process, so the switching method is very cumbersome and time-consuming

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