CN217112943U - Liquid crystal response time measuring circuit - Google Patents
Liquid crystal response time measuring circuit Download PDFInfo
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- CN217112943U CN217112943U CN202220509104.5U CN202220509104U CN217112943U CN 217112943 U CN217112943 U CN 217112943U CN 202220509104 U CN202220509104 U CN 202220509104U CN 217112943 U CN217112943 U CN 217112943U
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Abstract
The embodiment of the utility model discloses liquid crystal response time measuring circuit, include: the signal amplification module is used for converting the detected optical signal into an electric signal; the signal amplification module further includes: amplifying the electrical signal; the electrical signal comprises an analog signal; the signal conversion module converts the analog signal into a digital signal; the filtering module is used for filtering the digital signal; the output end of the signal amplification module is connected with the input end of the signal conversion module; the output end of the signal conversion module is connected with the input end of the filtering module. The utility model discloses liquid crystal response time measuring circuit, time interval when luminance through liquid crystal display panel switches realizes response time's measurement.
Description
Technical Field
The utility model relates to a measuring circuit technical field especially relates to a liquid crystal response time measuring circuit.
Background
The response time of the liquid crystal display panel is an important index for measuring a display, and the smoothness and the response speed of the display picture change process can be directly influenced by the length of the response time, and the use feeling of a user is also directly influenced.
In the prior art, the index is usually evaluated by a professional and expensive instrument, and how to conveniently and inexpensively detect the response time of the liquid crystal display panel becomes a technical problem to be solved urgently.
Disclosure of Invention
In order to solve the technical problem at least, the embodiment of the utility model provides a time interval when provides a liquid crystal response time measuring circuit, the luminance through liquid crystal display panel switches realizes the measurement to response time.
In order to achieve the above object, an embodiment of the present invention provides a liquid crystal response time measuring circuit, including:
the signal amplification module is used for converting the detected optical signal into an electric signal;
the signal amplification module further includes: amplifying the electrical signal;
the electrical signal comprises an analog signal;
the signal conversion module converts the analog signal into a digital signal;
the filtering module is used for filtering the digital signal;
the output end of the signal amplification module is connected with the input end of the signal conversion module; the output end of the signal conversion module is connected with the input end of the filtering module.
In some exemplary embodiments, the signal amplification module includes a photodiode.
In some exemplary embodiments, the photodiode includes a high speed photodiode.
In some exemplary embodiments, a high speed photodiode converts a received incoming optical signal into an electrical signal.
In some exemplary embodiments, the signal conversion module includes an a/D conversion circuit.
In some exemplary embodiments, the signal conversion module converts the analog signal into a digital signal through an a/D conversion circuit.
In some exemplary embodiments, the digital signal includes a voltage value.
In some exemplary embodiments, the output terminal of the filtering module is connected to a display terminal.
In some exemplary embodiments, the digital signal processed by the filtering module is displayed by a display terminal.
In some exemplary embodiments, the display terminal includes an oscilloscope or a display.
The utility model discloses liquid crystal response time measuring circuit, include: the signal amplification module is used for converting the detected optical signal into an electric signal; the signal amplification module further includes: amplifying the electrical signal; the electrical signal comprises an analog signal; the signal conversion module is used for converting the analog signal into a digital signal; the filtering module is used for filtering the digital signal; the output end of the signal amplification module is connected with the input end of the signal conversion module; the output end of the signal conversion module is connected with the input end of the filtering module. The liquid crystal response time measuring circuit provided by the embodiment of the utility model realizes the measurement of the response time of the liquid crystal display panel through the interval of the signal conversion time, wherein the optical signal conversion is an electric signal when the brightness of the liquid crystal display panel is switched; the response time of the liquid crystal display panel is measured through a simple circuit, and the effects of low detection cost, simplicity in use and convenience in maintenance are achieved; the purpose of signal visualization is also realized through the display terminal, so that the detection is more intuitive.
Drawings
In order to more clearly illustrate one or more embodiments or prior art solutions of the present specification, reference will now be made briefly to the attached drawings, which are needed in the description of one or more embodiments or prior art, and it should be apparent that the drawings in the description below are only some of the embodiments described in the specification, and that other drawings may be obtained by those skilled in the art without inventive exercise.
Fig. 1 is a schematic structural diagram of a liquid crystal response time measuring circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a signal amplification module of a liquid crystal response time measurement circuit according to an embodiment of the present invention.
Description of reference numerals:
101-a signal amplification module; 102-a signal conversion module; 103-a filtering module; d1-photodiode.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
The embodiment of the utility model provides a liquid crystal response time measuring circuit, include:
the signal amplification module is used for converting the detected optical signal into an electric signal;
the signal amplification module further includes: amplifying the electrical signal;
the electrical signal comprises an analog signal;
the signal conversion module is used for converting the analog signal into a digital signal;
the filtering module is used for filtering the digital signal;
the output end of the signal amplification module is connected with the input end of the signal conversion module; the output end of the signal conversion module is connected with the input end of the filtering module.
Example 1
Fig. 1 is a schematic structural diagram of a liquid crystal response time measuring circuit according to an embodiment of the present invention, and fig. 2 is a schematic signal amplification module diagram of a liquid crystal response time measuring circuit according to an embodiment of the present invention, which will be described in detail below with reference to fig. 1-2.
The utility model discloses liquid crystal response time measuring circuit, include: the device comprises a signal amplification module 101, a signal conversion module 102 and a filtering module 103.
In some exemplary embodiments, the signal amplification module 101 is configured to convert the detected optical signal into an electrical signal.
In some exemplary embodiments, the signal amplification module 101 further includes: the electrical signal is amplified.
In some exemplary embodiments, the electrical signal comprises an analog signal.
In some exemplary embodiments, the output terminal of the signal amplifying module 101 is connected to the input terminal of the signal converting module 102.
In some exemplary embodiments, the signal conversion module 102 converts an analog signal into a digital signal.
In some exemplary embodiments, the filtering module 103 performs a filtering process on the digital signal.
In some exemplary embodiments, the output of the signal conversion module 102 is connected to the input of the filtering module 103.
In some exemplary embodiments, the signal amplification module 101 includes a photodiode D1.
In some exemplary embodiments, photodiode D1 is also referred to as a photodiode, and photodiode D1 has a glass window in its package to receive light.
In some exemplary embodiments, the photodiode is characterized in that when light irradiates its PN junction, free electrons and holes are generated in pairs, so that the concentration of minority carriers in the semiconductor is increased, and the reverse current is increased under a certain reverse bias voltage. Its reverse current increases linearly with increasing illumination intensity.
In some exemplary embodiments, a Photo-Diode (Photo-Diode) is a semiconductor device composed of a PN junction, like a general Diode, and has a unidirectional conductive characteristic, but it is not used as a rectifying element in a circuit, but is a Photo-sensor device that converts an optical signal into an electrical signal.
In some exemplary embodiments, the photodiode D1 is designed and fabricated to have as large an area as possible of the PN junction to receive incident light.
In some exemplary embodiments, the photodiode D1 is operated under reverse voltage, and in the absence of light, the reverse current is extremely weak, called dark current; in the presence of light, the reverse current rapidly increases to tens of microamperes, referred to as photocurrent. The greater the intensity of the light, the greater the reverse current.
In some exemplary embodiments, the change in incident light causes a change in the current of the photodiode D1, which converts the optical signal into an electrical signal to become a photo-sensing device.
In some exemplary embodiments, the liquid crystal response time measuring circuit of the embodiments of the present invention utilizes the above-mentioned characteristics of the photodiode D1 to realize the measurement of the liquid crystal response time.
In some exemplary embodiments, the photodiode D1 comprises a high speed photodiode.
In some exemplary embodiments, the high speed photodiode is fully satisfactory because the response time is typically in the order of us and the liquid crystal response time is in the order of ms.
In some exemplary embodiments, a high speed photodiode converts a received incoming optical signal into an electrical signal.
In some exemplary embodiments, the high speed photodiode includes an a pole and a K pole.
In some exemplary embodiments, the high speed photodiode has the anode a as the positive electrode.
In some exemplary embodiments, the high speed photodiode has the K pole as the negative pole.
In some exemplary embodiments, the high-speed photodiode converts the optical signal received by the a pole into an electrical signal and outputs the electrical signal through the K pole.
In some exemplary embodiments, the electrical signal output by the K-pole of the high-speed photodiode is amplified by an amplifier.
In some exemplary embodiments, the signal amplification module 101 includes an amplifier.
In some exemplary embodiments, the signal amplification module 101 includes a resistor, which includes a feedback resistor, through which the limitation of the amplification capability of the electrical signal is achieved.
In some exemplary embodiments, the liquid crystal response time is measured by switching the picture from white to black, or from black to white; or measuring gray scale response time by switching different gray scales; when the picture is switched, different brightness (i.e. light signals) are displayed, and since there is a certain time interval when switching between different brightness, the measurement of the response time of the liquid crystal is realized through the time interval.
In some exemplary embodiments, the signal conversion module 102 includes an a/D conversion circuit.
In some exemplary embodiments, an a/D conversion circuit (analog to digital ).
In some exemplary embodiments, the signal conversion module 102 converts the analog signal into a digital signal through an a/D conversion circuit.
In some exemplary embodiments, the digital signal comprises a voltage value, i.e. a voltage signal.
In some exemplary embodiments, the signal conversion module 102 may obtain a larger range of voltage values through the a/D conversion circuit.
In some exemplary embodiments, the output of the filtering module 103 is connected to a display terminal.
In some exemplary embodiments, the digital signal processed by the filtering module 103 is displayed by a display terminal.
In some exemplary embodiments, the digital signal processed by the filtering module 103 reduces the influence of other noises, so that the measurement result is more accurate.
In some exemplary embodiments, the display terminal includes an oscilloscope or a display.
In some exemplary embodiments, the collected signals are detected by the photodiode D1, converted, amplified, filtered and finally output to a display terminal for visualization.
In some exemplary embodiments, the signal presented on the display terminal includes a waveform diagram, making the signal more intuitive.
Claims (10)
1. A liquid crystal response time measurement circuit, comprising:
the signal amplification module is used for converting the detected optical signal into an electric signal;
the signal amplification module further includes: amplifying the electrical signal;
the electrical signal comprises an analog signal;
a signal conversion module that converts the analog signal to a digital signal;
the filtering module is used for filtering the digital signal;
the output end of the signal amplification module is connected with the input end of the signal conversion module; and the output end of the signal conversion module is connected with the input end of the filtering module.
2. The liquid crystal response time measurement circuit of claim 1, wherein the signal amplification module comprises a photodiode.
3. The liquid crystal response time measurement circuit of claim 2, wherein the photodiode comprises a high speed photodiode.
4. The liquid crystal response time measurement circuit of claim 3, wherein the high speed photodiode converts a received incoming optical signal to an electrical signal.
5. The liquid crystal response time measurement circuit of claim 4, wherein the signal conversion module comprises an A/D conversion circuit.
6. The liquid crystal response time measurement circuit of claim 5, wherein the signal conversion module converts the analog signal to a digital signal through the A/D conversion circuit.
7. The liquid crystal response time measurement circuit of claim 6, wherein the digital signal comprises a voltage value.
8. The liquid crystal response time measurement circuit of claim 7, wherein an output of the filter module is connected to a display terminal.
9. The liquid crystal response time measuring circuit according to claim 8, wherein the digital signal processed by the filtering module is displayed by a display terminal.
10. The liquid crystal response time measurement circuit of claim 9, wherein the display terminal comprises an oscilloscope or a display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220509104.5U CN217112943U (en) | 2022-03-09 | 2022-03-09 | Liquid crystal response time measuring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220509104.5U CN217112943U (en) | 2022-03-09 | 2022-03-09 | Liquid crystal response time measuring circuit |
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| Publication Number | Publication Date |
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| CN217112943U true CN217112943U (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220509104.5U Active CN217112943U (en) | 2022-03-09 | 2022-03-09 | Liquid crystal response time measuring circuit |
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| CN (1) | CN217112943U (en) |
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- 2022-03-09 CN CN202220509104.5U patent/CN217112943U/en active Active
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