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Device and method for generating cell panel detection signal

A technology for panel detection and signal generation, applied in instruments, computer control, simulators, etc., can solve the problems of increasing system cost and complexity, and achieve the effect of improving system capacity or performance, low cost, and reducing the number of expansion channels

Active Publication Date: 2017-01-18
WUHAN JINGCE ELECTRONICS GRP CO LTD
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  • Application Information

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Problems solved by technology

In this way, when using a parallel digital-to-analog converter with a higher number of digits or designing more detection channels, it is necessary to use multiple FPGAs, which will undoubtedly increase the cost and complexity of the system

Method used

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  • Device and method for generating cell panel detection signal

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

[0028] like figure 1 The shown CELL panel detection signal generating device includes a host computer 5, a controller 1, a plurality of serial digital-to-analog converter groups 2, a single-pole double-throw analog switch 3 with the same number as the serial digital-analog converter group 2, and a power Amplifier 4, wherein each serial digital-to-analog converter group 2 includes a first serial digital-to-analog converter 2.1 and a second serial digital-to-analog converter 2.2, and the signal output end of the host computer 5 is connected to the controller 1 The signal input terminal of the controller 1, the code value output terminal of the controller 1 is connected to each of the first serial digital-to-analog converters 2.1 and the second serial digital-to-analog converters 2.2 through the serial bus 6, and each serial digital-to-a...

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Abstract

The invention discloses a CELL panel detection signal generation device. The signal output end of an upper computer of the device is connected with the signal input end of a controller. The code value output end of the controller is connected with each first serial digital-to-analog converter and each second serial digital-to-analog converter. The analog quantity output end of the first serial digital-to-analog converter in each serial digital-to-analog converter set is connected with a first input interface of a corresponding single-pole double-throw analog switch. The analog quantity output end of the second serial digital-to-analog converter in each serial digital-to-analog converter set is connected with a second input interface of the corresponding single-pole double-throw analog switch. Each analog switch control signal output end of the controller is connected with the control end of the corresponding single-pole double-throw analog switch. An output interface of each single-pole double-throw analog switch is connected with a corresponding power amplifier. The CELL panel detection signal generation device can output both high-precision DC signals and high-voltage-slew-rate AC signals, so that cost for generation of panel detection signals is lowered.

Description

technical field [0001] The invention relates to the technical field of liquid crystal panel production, in particular to a detection signal generating device and method for a CELL panel (a liquid crystal screen without a driver chip installed in a liquid crystal production process). Background technique [0002] In the production process of CELL panels, in order to reduce the defective rate of the final product, it is necessary to test by testing equipment in the early stage of production to screen out CELL panels with bright spots, dark spots, bright lines, screen flicker and other undesirable performances. The detection equipment applies various waveform signals to the CELL panel under test, and charges each pixel circuit to a state where it can emit light, so as to achieve the purpose of detection. [0003] The current CELL panel detection signal generating device includes an FPGA (Field-Programmable Gate Array, Field Programmable Gate Array), a digital to analog converte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
Inventor 彭骞方红白静陈凯沈亚非
Owner WUHAN JINGCE ELECTRONICS GRP CO LTD
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