CN105652483A - Liquid crystal display optical parameter measurement method and device based on fiber transmission - Google Patents
Liquid crystal display optical parameter measurement method and device based on fiber transmission Download PDFInfo
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- CN105652483A CN105652483A CN201610151203.XA CN201610151203A CN105652483A CN 105652483 A CN105652483 A CN 105652483A CN 201610151203 A CN201610151203 A CN 201610151203A CN 105652483 A CN105652483 A CN 105652483A
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- optical
- liquid crystal
- crystal display
- eyepiece
- optical fiber
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
Abstract
The invention discloses a liquid crystal display optical parameter measurement method and device based on fiber transmission. The method comprises the following steps: gathering optical signals produced by a liquid crystal display through a lens group probe, adjusting angles of incident light entering the lens group probe according to an adopted standard, meanwhile converging the incident light of which the angles are adjusted, leading optical signals to one end of an optical fiber after convergence, conducting the optical signals to detection equipment through the other end of the optical fiber, measuring the optical signals through the detection equipment, correcting measure results again, and obtaining an accurate value. According to the method, the optical signals produced by the liquid crystal display is conducted to a far end through the optical fiber and then is measured, on one hand, the influence on the measurement probe by the field severe environment is avoided, the measurement stability and reliability are improved, and cost increase cannot be caused, and on the other hand, as the optical fiber has certain flexibility and can be collected into a whole body like a harness, mounting is more flexible, and distributed measurement is convenient to perform.
Description
Technical field
The invention belongs to the test of liquid crystal display screen and detection technique field, be specifically related to a kind of liquid crystal display screen optical parameter measurement method based on fiber optic conduction and device.
Background technology
The research and development of liquid crystal display screen, production, test and dispatch from the factory before debugging link in, need the various optical parametrics of liquid crystal display screen are measured, the parameters such as such as brightness, colourity, flicker degree, in order to the parameters of liquid crystal display screen is optimized and regulates and judges that whether this liquid crystal module is qualified. Traditional metering system is the top that measuring probe is placed directly in liquid crystal module, directly the parameters of liquid crystal module is measured. But under some special occasions or environment, but there is very big defect in the method. Such as, in the burn-in test to liquid crystal module, owing to the temperature and humidity in ageing oven is all significantly high, just high-accuracy measuring probe is created very big impact, the precision measured and reliability are declined sharp, and adopt the extraordinary measurement device of high-temp resisting high-humidity resisting, not only it is of limited application, and substantially increases cost.
Summary of the invention
The purpose of the present invention is contemplated to solve the deficiency that above-mentioned background technology exists, it is provided that a kind of certainty of measurement is high, cost the is low liquid crystal display screen optical parameter measurement method based on fiber optic conduction and device.
The technical solution used in the present invention is: a kind of liquid crystal display screen optical parameter measurement method based on fiber optic conduction, measurement process is: gather, by mirror group probe, the optical signalling that liquid crystal display screen produces, the angle entering the incident illumination that mirror group is popped one's head in is regulated according to measuring institute's accepted standard, incident illumination after adjusting angle is assembled simultaneously, optical signalling after assembling is imported optical fiber one end, optical signalling conducts to detecting equipment through the optical fiber other end, optical signalling is measured by detection equipment, again measurement result is corrected, obtains exact value.
Further, described mirror group probe is connected with optical fiber one end, and described mirror group probe includes housing and is positioned at object lens, diaphragm and the eyepiece that housing coaxially sets gradually, and described eyepiece is positioned close to one end of optical fiber.
Further, the distance between described object lens and eyepiece is the focal length sum of eyepiece and object lens, and described optical fiber end is positioned in the focus of eyepiece.
Further, described regulating the size that the angle of incident illumination entering mirror group probe is the distance by adjusting in mirror group probe between object lens, diaphragm, eyepiece and diaphragm bore and realize, described incident illumination after adjusting angle is assembled is that distance by adjusting between eyepiece and optical fiber end realizes.
Further, the described method that optical signalling is corrected is for by introducing correction coefficient correction.
A kind of liquid crystal display screen optical parameter measurement device based on fiber optic conduction, including:
Mirror group is popped one's head in, and is connected to optical fiber one end, for gathering the optical signalling that liquid crystal display screen produces, and carries out optical signalling importing optical fiber one end after process converts;
Optical fiber, for the optical signalling conduction after acquisition process of mirror group being popped one's head in measurement device;
Measurement device, connects the optical fiber other end, conducts the optical signalling come for detection fiber, and testing result is corrected.
Further, mirror group probe includes housing and is positioned at object lens, diaphragm and the eyepiece that housing coaxially sets gradually, and described eyepiece is positioned close to one end of optical fiber.
Further, the distance between object lens and eyepiece is the focal length sum of eyepiece and object lens, and described optical fiber end is positioned in the focus of eyepiece.
The generation optical signalling conduction of liquid crystal display screen is measured to far-end by the present invention by optical fiber again, avoids the on-the-spot adverse circumstances impact on measuring probe on the one hand, improves stability and the reliability of measurement, also do not result in the increase of cost; On the other hand, owing to optical fiber has certain pliability, it is possible to carry out being summarised in together as wire harness, install more flexible, it is simple to carry out distributed measurement.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the schematic diagram of the detection of mirror group of the present invention probe.
Fig. 3 is the overhaul flow chart of the present invention.
Fig. 4 is the deviation schematic diagram that the present invention does not correct between before measurement value and exact value.
Fig. 5 is the deviation schematic diagram after the present invention corrects between measured value and exact value.
1-mirror group is popped one's head in; 1.1-housing; 1.2-object lens; 1.3-diaphragm; 1.4-eyepiece; 2-optical fiber; 3-measurement device; 4-PC machine; 5-liquid crystal display screen; 6-ageing oven; 7-incident illumination; 8-low-angle light
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, it is simple to be well understood to the present invention, but the present invention is not constituted restriction by them.
As shown in Figure 1 and Figure 2, the present invention includes mirror group probe 1, optical fiber 2 and measurement device 3 based on the liquid crystal display screen optical parameter measurement device of fiber optic conduction, wherein
Mirror group probe 1 is connected to optical fiber 2 one end, for gathering the optical signalling that liquid crystal display screen 5 produces, and carries out optical signalling importing optical fiber 2 one end after process converts;
Optical fiber 2 is for the optical signalling conduction after 1 acquisition process of mirror group being popped one's head in measurement device 3;
Measurement device 3 connects optical fiber 2 other end, conducts the optical signalling come for detection fiber, and testing result is corrected, display afterwards on PC 4.
In such scheme, mirror group probe 1 includes housing 1.1 and is positioned at object lens 1.2, diaphragm 1.3 and the eyepiece 1.4 that housing 1.1 coaxially sets gradually, and described eyepiece 1.4 is positioned close to one end of optical fiber 2. Distance between object lens 1.2 and eyepiece 1.4 is the focal length sum of object lens 1.2 and eyepiece 1.4, and described optical fiber 2 end is positioned in the focus of eyepiece 1.4.The angle of the incident illumination of mirror group probe can be controlled to enter by adjusting the size of object lens, spacing between diaphragm and eyepiece and the aperture of the diaphragm, and then improve certainty of measurement.
As shown in Figure 3, adopt above-mentioned measurement apparatus measure liquid crystal display screen optical parametric method process be: by mirror group pop one's head in 1 collection liquid crystal display screen 5 produce optical signalling, mirror group probe 1 imports optical fiber 2 one end after optical signalling is carried out process conversion, optical signalling is through optical fiber 2 other end conduction to detection equipment 3, optical signalling is measured by detection equipment, again measurement result is corrected, obtains exact value.
In such scheme, optical signalling is carried out processes conversion and includes, according to measuring the angle that institute's accepted standard regulates the incident illumination of entrance mirror group probe, the visible ray after adjusting angle being assembled simultaneously.
The angle of incident illumination depends on measuring institute's accepted standard. As when adopting CIE (International Commission on Illumination) color system that liquid crystal display screen carries out color measuring and analysis, wherein just defined standard observer (StandardObserver) standard: the ordinary human response to color. This standard adopts three kinds of primary colours of X, Y and Z of the imagination, represents with color matching functions (color-matchingfunction). Color matching experiment uses the visual field (fieldofview) (referring to CIE-1931 standard) of 2 ��, so when adopting this standard to carry out color measuring, incidence must be limited in �� 1 �� of scope within, simulating in this standard �� the eye-observation effect of 1 ��. Thereafter, this system has been done many improvement by the brainstrust of International Commission on Illumination, including the experimental data according to 10 �� of visuals field in 1964, with the addition of the definition of supplementary standard observer (SupplementaryStandardObserver), if adopting CIE-1964, the incident illumination angle of the system of measurement should be controlled at �� 5 ��.
The present invention regulates the size that the angle of incident illumination entering mirror group probe is the distance by adjusting in mirror group probe between object lens, diaphragm, eyepiece and diaphragm bore and realizes. Coordinate diaphragm, just can only allow pass through less than a certain low-angle light 8 by the distance between size and object lens and the eyepiece of adjustment diaphragm bore, it is achieved the control to incident angle of light.
It is realized by the distance between adjustment eyepiece and optical fiber end that incident illumination after adjusting angle is assembled. Incident illumination is converged by the distance adjusted between eyepiece and optical fiber end, which adds the luminous flux entered in optical fiber, making measurement signal be strengthened, thus putting forward the signal to noise ratio of height measuring system; Also function to the effect that the angle of incident illumination is converted on the other hand, allowed the light entering optical fiber enter in approximately parallel mode, meet the requirement of total reflection, reduce the decay to visible ray, improve the utilization ratio to light further.
In such scheme, the method that optical signalling is corrected is for by introducing correction coefficient correction. Although the efficiency of fiber optic conduction is significantly high, but measured signal can there be is certain attenuation, thus measurement result be created certain impact, causes certain measurement error. As shown in Figure 4, for measuring liquid crystal display screen the deviation schematic diagram between measured value and exact value before not correcting time. Measured value, by introducing a series of correction coefficient, is carried out certain conversion and measurement result just can be allowed closer to exact value by the present invention.
Such as, to in liquid crystal display screen chromaticity coordinates measurement process, take the chromaticity coordinates measured value respectively [XrYrZr] under tri-kinds of colored picture of R, G, B, [XgYgZg] and [XbYbZb] respectively, and introduce the correction coefficient below three kinds of colors respectively kr, kg and kb, and assume that measured value is [XwYwZw] accurately, then have following relation:
Conversion can obtain further:
If above matrix is carried out inverse transformation, it is possible to obtain corresponding correction coefficient kr, kg and kb.After trying to achieve corresponding correction coefficient, we only need will to obtain measured value plus optical fiber and are multiplied by this coefficient and can be obtained by a point-device measurement result, be equivalent to the chromaticity coordinates matrix before not correcting has been carried out a rotation transformation, as shown in Figure 5, it can be seen that measured value after corrected is closer to exact value.
The mode of the fiber optic conduction that the present invention adopts, conducts the outside to ageing oven 6 by the optical signalling of liquid crystal display screen module, recycles the measurement of existing measurement device, not only increases Measurement reliability, stability and motility, but also do not result in the increase of cost.
The content not being described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (8)
1. the liquid crystal display screen optical parameter measurement method based on fiber optic conduction, it is characterized in that: gather, by mirror group probe, the optical signalling that liquid crystal display screen produces, the angle entering the incident illumination that mirror group is popped one's head in is regulated according to measuring institute's accepted standard, incident illumination after adjusting angle is assembled simultaneously, optical signalling after assembling is imported optical fiber one end, optical signalling conducts to detecting equipment through the optical fiber other end, optical signalling is measured by detection equipment, again measurement result is corrected, obtains exact value.
2. a kind of liquid crystal display screen optical parameter measurement method based on fiber optic conduction according to claim 1, it is characterized in that: described mirror group probe is connected with optical fiber one end, described mirror group probe includes housing and is positioned at object lens, diaphragm and the eyepiece that housing coaxially sets gradually, and described eyepiece is positioned close to one end of optical fiber.
3. a kind of liquid crystal display screen optical parameter measurement method based on fiber optic conduction according to claim 2, it is characterised in that: the distance between described object lens and eyepiece is the focal length sum of eyepiece and object lens, and described optical fiber end is positioned in the focus of eyepiece.
4. a kind of liquid crystal display screen optical parameter measurement method based on fiber optic conduction according to claim 1, it is characterized in that: described regulate the size that the angle of incident illumination entering mirror group probe is the distance by adjusting in mirror group probe between object lens, diaphragm, eyepiece and diaphragm bore and realize, described incident illumination after adjusting angle is assembled is that distance by adjusting between eyepiece and optical fiber end realizes.
5. a kind of liquid crystal display screen optical parameter measurement method based on fiber optic conduction according to claim 1, it is characterised in that: the described method that optical signalling is corrected is for by introducing correction coefficient correction.
6. the liquid crystal display screen optical parameter measurement device based on fiber optic conduction, it is characterised in that: include
Mirror group is popped one's head in, and is connected to optical fiber one end, for gathering the optical signalling that liquid crystal display screen produces, and carries out optical signalling importing optical fiber one end after process converts;
Optical fiber, for the optical signalling conduction after acquisition process of mirror group being popped one's head in measurement device;
Measurement device, connects the optical fiber other end, conducts the optical signalling come for detection fiber, and testing result is corrected.
7. a kind of liquid crystal display screen optical parameter measurement device based on fiber optic conduction according to claim 6, it is characterized in that: described mirror group probe includes housing and is positioned at object lens, diaphragm and the eyepiece that housing coaxially sets gradually, and described eyepiece is positioned close to one end of optical fiber.
8. a kind of liquid crystal display screen optical parameter measurement device based on fiber optic conduction according to claim 7, it is characterised in that: the distance between described object lens and eyepiece is the focal length sum of eyepiece and object lens, and described optical fiber end is positioned in the focus of eyepiece.
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| CN201610151203.XA CN105652483B (en) | 2016-03-16 | 2016-03-16 | A kind of liquid crystal display optical parameter measurement method and device based on fiber optic conduction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110648616A (en) * | 2019-09-29 | 2020-01-03 | 云谷（固安）科技有限公司 | Flexible display screen detection device and method |
| CN110741300A (en) * | 2017-06-15 | 2020-01-31 | 柯尼卡美能达株式会社 | Optical system for measurement, color luminance meter, and color meter |
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Address after: 430070 Hubei Province, Wuhan city Hongshan District Road No. 48 bookstore (North Industrial Park) 1 building 11 layer Applicant after: Wuhan fine test electronics group Limited by Share Ltd Address before: 430070 Hongshan entrepreneurship center, No. 53, Nanhu Avenue, Hongshan District, Wuhan, Hubei Province, 4 Applicant before: Wuhan Jingce Electronic Technology Co., Ltd. |
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