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Frequency detection method and frequency detection device

A technology of frequency detection and frequency, which is applied in the field of frequency detection methods and frequency detection devices, can solve the problems of detecting the output frequency of ring oscillators, etc., and achieve the effect of convenient detection

Active Publication Date: 2018-06-29
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the prior art, there is no solution that can easily detect the output frequency of the ring oscillator

Method used

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  • Frequency detection method and frequency detection device

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Embodiment Construction

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the frequency detection method and frequency detection device provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0037] figure 1 A flow chart of a frequency detection method provided by Embodiment 1 of the present invention, such as figure 1 As shown, the method includes:

[0038] Step 101, collect a first frequency value of the ring oscillator at a first time point and a second frequency value at a second time point, and the frequency expression includes a correspondence between time points and frequencies.

[0039] Step 102: Generate a stable output frequency and a constant coefficient according to the first time point, the first frequency value, the second time point, and the second frequency value.

[0040] Step 103: Generate a frequency expression according to the stable output frequency ...

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Abstract

The invention discloses a frequency detection method and a frequency detection device. The method comprises the following steps: collecting a first frequency value of a ring oscillator at a first timepoint and a second frequency value of the ring oscillator at a second time point; generating a stable output frequency and a constant coefficient according to the first time point, the first frequency value, the second time point and the second frequency value; and generating the frequency expression according to the stable output frequency and the constant coefficient. The frequency corresponding to any time point is calculated by virtue of the generated frequency expression, so that the output frequency of the ring oscillator is conveniently detected.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a frequency detection method and a frequency detection device. Background technique [0002] A ring oscillator is provided in the display device. The ring oscillator is composed of multi-stage inverters, which can be composed of a-Si TFTs. Due to the current I of the a-Si TFT ON With the characteristic of changing with temperature, the ring oscillator will have different charging and discharging time with the different magnitude of the current. The ring oscillator needs to go through a certain charge and discharge time before the output frequency value will be stable. Therefore, the temperature can be judged by detecting the frequency value of the output of the ring oscillator. [0003] However, in the prior art, there is no solution that can conveniently detect the output frequency of the ring oscillator. Contents of the invention [0004] The invention provides a freque...

Claims

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Application Information

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IPC IPC(8): G01R23/02
CPCG01R23/02
Inventor 郑智仁韩艳玲赵利军曹学友刘伟张平王海生
Owner BOE TECH GRP CO LTD