CN114112944A - Display panel measuring method - Google Patents
Display panel measuring method Download PDFInfo
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- CN114112944A CN114112944A CN202210084290.7A CN202210084290A CN114112944A CN 114112944 A CN114112944 A CN 114112944A CN 202210084290 A CN202210084290 A CN 202210084290A CN 114112944 A CN114112944 A CN 114112944A
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- display panel
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- chromaticity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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Abstract
The invention discloses a display panel measuring method.A planar array optical sensor acquires image information of a display panel based on a first lens; meanwhile, the single-point measuring probe acquires optical information of a single-point target position on a display panel based on a second lens, deviates from the optical axis of the second lens on the image plane of the second lens and is arranged far away from the area array optical sensor; the single-point target position of the display panel is positioned in the intersection area of the visual field of the first lens and the visual field of the second lens; completing analysis of the display panel based on the image information and the optical information. The method not only can realize the spectrum detection and the flaw defect detection of the display panel on the same station, but also can ensure that the light energy is not attenuated in the detection process, and has good measurement precision.
Description
Technical Field
The invention belongs to the technical field of display panel detection, and particularly discloses a display panel measuring method.
Background
As technology advances, the evaluation of the characteristics of display panels or luminaries is increasingly important to the characteristics of products. Common light emitters include different types of display panels such as LED, micro LED, MiniLED, LD, etc., and their constituent products include, but are not limited to, consumer electronics products, mobile phone screens, television displays, etc.
For these display products, the evaluation of the light emission characteristics thereof is particularly important for the quality evaluation of the products thereof, and the most important parameters of these quality evaluation indicators include the light emission spectrum, and whether the display products have flaws and defects in the display area.
When spectrum and defect detection is carried out on a display product, a separate spectrometer and an industrial camera are generally adopted for imaging in the prior art, the technical scheme needs at least two stations, and the display panel is switched between the two stations through a moving mechanism to complete time-sharing work. For example, the spectral measurement is carried out at a first station at a first moment, after the measurement is finished, the product is moved to a position below a camera, and imaging detection is carried out on the product at a second moment and a second station based on the camera; the technical scheme has the following technical problems: 1. the detection system has high complexity, namely two detection stations are needed to complete spectral measurement and defect detection; 2. the detection time is long, and especially when the same product needs to perform spectrum measurement and defect detection of a plurality of different display frames, twice the time is needed.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a display panel measuring method which not only can realize the spectrum detection and the flaw defect detection of the display panel on the same station, but also can ensure that the light energy is not attenuated in the detection process and has good measuring precision.
The invention discloses a display panel measuring method.A planar array optical sensor acquires image information of a display panel based on a first lens; meanwhile, the single-point measuring probe acquires optical information of a single-point target position on a display panel based on a second lens, deviates from the optical axis of the second lens on the image plane of the second lens and is arranged far away from the area array optical sensor; the single-point target position of the display panel is positioned in the intersection area of the visual field of the first lens and the visual field of the second lens; completing analysis of the display panel based on the image information and the optical information.
In a preferred embodiment of the present invention, the single-point measurement probe is a flicker probe, flicker information of the display panel is obtained based on the flicker probe, and the quality of the display panel is analyzed based on the flicker information and the image information.
In a preferred embodiment of the present invention, the single-point measurement probe is a single-point standard luminance and/or chromaticity measurement unit, and acquires a luminance and/or chromaticity measurement value of a center point of the display panel based on the single-point standard luminance and/or chromaticity measurement unit;
and acquiring the area array brightness and/or chromatic value of the display panel based on the image information, and correcting the area array brightness and/or chromatic value of the display panel based on the brightness and/or chromatic value of the central point of the display panel to obtain the corrected area array brightness and/or chromatic value of the display panel.
In a preferred embodiment of the present invention, the single-point standard luminance and/or chromaticity measuring unit obtains luminance and/or chromaticity measurement values at a center point of the display panel and/or obtains luminance and/or chromaticity measurement values at other positions of the display panel, and corrects the area array luminance and/or chromaticity value of the display panel based on the luminance and/or chromaticity measurement values at the center point of the display panel and/or at other positions of the display panel.
In a preferred embodiment of the present invention, the display panel further comprises a control device, wherein the control device controls the sensor chip corresponding to the single-point standard luminance and/or chromaticity measuring component to move, so that the single-point standard luminance and/or chromaticity measuring component obtains luminance and/or chromaticity measured values of a plurality of points on the display panel in a time-sharing manner, and corrects the area array luminance and/or chromaticity value of the display panel according to the luminance and/or chromaticity measured values of the plurality of points.
In a preferred embodiment of the present invention, an imaging unit is included, including a first lens and an area array optical sensor, the first lens having a first field of view on a display panel; the single-point measurement unit comprises a second lens and a single-point measurement probe, and the second lens has a second visual field on the display panel; the first view and the second view intersect to form an intersecting view, and the measurement position of the single-point measurement unit is located within the intersecting view.
In a preferred embodiment of the invention, a housing is included; a first lens is arranged on the shell body,
an area array optical sensor corresponding to the first lens is arranged in the shell; the shell is also provided with a second lens, and a single-point measuring probe corresponding to the second lens is arranged in the shell; the single-point measuring probe deviates from the optical axis of the second lens on the image plane of the second lens and is far away from the area array optical sensor.
In a preferred embodiment of the invention, the intersecting views comprise at least a center point of the first view.
In a preferred embodiment of the present invention, the single-point measurement probe is located at a position of a center point of the first field of view relative to a conjugate image point of the second lens.
In a preferred embodiment of the present invention, the display panel is located within said first viewing area and partially within said intersecting viewing area; the single-point measuring probe deviates from the optical axis of the second lens and is arranged at the position of the center of the display panel relative to the conjugate image point of the second lens.
In a preferred embodiment of the present invention, a central axis of the first lens, a central axis of the light-sensing surface of the area array optical sensor, and a central axis of the display panel are coaxially arranged.
In a preferred embodiment of the present invention, the focal length of the first lens is equal to or different from the focal length of the second lens.
The invention has the beneficial effects that: the display panel measuring method disclosed by the invention not only can realize spectrum detection and flaw defect detection on the display panel on the same station, but also can ensure that light energy is not attenuated in the detection process, and has good measuring precision;
furthermore, the invention can realize the detection of different defects of the display panel by selecting different types of single-point measuring probes, for example, the detection of the defects of the display panel can be realized by utilizing a spectrum probe, and the area array brightness and/or chromatic value of the display panel can be corrected by utilizing a single-point standard brightness and/or chromatic measurement component, thereby improving the universality of the invention;
the invention further discloses a device for realizing the method, which has the advantages of simple structure, short measurement time consumption, high light energy utilization rate and good detection precision, and can realize the spectrum detection and flaw defect detection of the display panel on the same station by integrating the imaging unit and the spectrum measurement unit;
furthermore, the invention is based on the improvement of the industrial camera, and the spectral measurement unit is added on the original industrial camera, so that the method has the advantages of low cost and convenience in manufacturing;
furthermore, the central shaft of the first lens, the central shaft of the area array optical sensor and the central shaft of the display panel are coaxially arranged, so that the imaging unit is more favorable for imaging;
furthermore, multiple groups of spectrum measuring units can be configured on the industrial camera according to requirements, and each group of multiple groups of spectrum measuring units comprises a second lens and a spectrometer, so that the system has good compatibility and is suitable for detection of various display panels;
furthermore, the first lens and the second lens with equal or unequal focal lengths can be selected, so that the lenses with different lengths can be reasonably selected according to different environments, and the interference of the lens with other devices in the detection process is avoided;
furthermore, the probe of the spectrometer comprises a spectrometer sensor probe or a high-speed photoelectric probe or a light intensity detector or an intensity detector, so that the universality of the spectrometer is improved;
furthermore, the distance between the central axis of the first lens and the central axis of the second lens is adjustable, so that the debugging in the product assembling stage is facilitated.
Drawings
FIG. 1 is a schematic view of a first viewing area of a display panel measurement method according to the present invention;
FIG. 2 is a second view of a display panel measurement method according to the present invention;
FIG. 3 is a schematic view of an intersecting field of view of a display panel measurement method of the present invention;
in the figure: 1-housing, 2-first lens, 3-area array optical sensor, 4-second lens, 5-display panel, 6-single point measuring probe, 7-first view, 8-second view, 9-intersecting view.
Detailed Description
The invention will now be described in further detail, including the preferred embodiments, with reference to the accompanying drawings and by way of illustration of some alternative embodiments of the invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
As shown in fig. 1-3, the present invention discloses a display panel measuring method, an area array optical sensor 3 obtains image information of a display panel based on a first lens 2; meanwhile, the single-point measuring probe 6 acquires optical information of a single-point target position on the display panel based on the second lens 4, and the single-point measuring probe 6 deviates from the optical axis of the second lens 4 on the image plane of the second lens 4 and is arranged far away from the area array optical sensor 3; the single point target position of the display panel is positioned in the intersection area of the visual field of the first lens 2 and the visual field of the second lens 4; completing analysis of the display panel based on the image information and the optical information.
Preferably, the single-point measurement probe 6 is a flicker probe, flicker information of the display panel is acquired based on the flicker probe, and the quality of the display panel is analyzed based on the flicker information and the image information.
Preferably, the single-point measurement probe 6 is a single-point standard brightness and/or chromaticity measurement component, and obtains a brightness and/or chromaticity measurement value of the center point of the display panel based on the single-point standard brightness and/or chromaticity measurement component; and acquiring the area array brightness and/or chromatic value of the display panel based on the image information, and correcting the area array brightness and/or chromatic value of the display panel based on the brightness and/or chromatic value of the central point of the display panel to obtain the corrected area array brightness and/or chromatic value of the display panel.
Preferably, the single-point standard luminance and/or chromaticity measuring part acquires luminance and/or chromaticity measurement values of a center point of the display panel and/or luminance and/or chromaticity measurement values of other positions of the display panel, and corrects the area array luminance and/or chromaticity values of the display panel based on the luminance and/or chromaticity measurement values of the center point of the display panel and/or other positions of the display panel.
Preferably, the display panel further comprises a control device, wherein the control device controls the sensor chip corresponding to the single-point standard brightness and/or chromaticity measuring component to move, so that the single-point standard brightness and/or chromaticity measuring component acquires the brightness and/or chromaticity measured values of a plurality of points on the display panel in a time-sharing manner, and corrects the area array brightness and/or chromaticity value of the display panel according to the brightness and/or chromaticity measured values of the plurality of points.
The invention also discloses a device for realizing the method, which is an improvement based on an industrial camera and is integrated with an imaging unit, wherein the imaging unit comprises a first lens 2 and an area array optical sensor 3, the first lens 2 forms a first visual field 7 on a display panel 5, and light beams on the display panel 5 in the first visual field 7 are received by the area array optical sensor 3 through the first lens 2; the spectrum measuring unit comprises a second lens 4 and a spectrometer, the second lens 4 forms a second visual field 8 on the display panel 5, and light beams on the display panel 5 in the second visual field 8 are received by a probe of the spectrometer through the second lens 4; the first view 7 and the second view 8 intersect to form an intersecting view 9, and the point to be measured on the display panel 5 is located in the intersecting view 9 (including a boundary region of the intersecting view 9), that is, a light beam of the point to be measured on the display panel 5 is received by the area array optical sensor 3 through the first lens 2 and is received by a probe of the spectrometer through the second lens 4, and the two views do not interfere with each other.
Preferably, the optical lens comprises a housing 1, wherein 1 first lens 2 is arranged on the housing 1, 1 area array optical sensor 3 is arranged in the housing 1, and the arrangement position of 1 first lens 2 corresponds to the arrangement position of 1 area array optical sensor 3.
Preferably, the central axis of the first lens 2, the central axis of the area array optical sensor 3, and the central axis of the display panel 5 are coaxially arranged.
Preferably, the device comprises a housing 1, wherein 1 second lens 4 is arranged on the housing 1, 1 spectrometer is arranged in the housing 1, and the arrangement position of the second lens 4 corresponds to the arrangement position of the spectrometer.
Preferably, the probe of the spectrometer and the point to be measured on the display panel 5 are conjugated with respect to the second lens 4.
Preferably, one second lens 4 corresponds to at least one spectrometer.
Preferably, the focal length of the first lens 2 is equal to that of the second lens 4 or the focal length of the first lens 2 may be slightly different from that of the second lens 4, for example, the length of the second lens 4 is shorter and the working distance is longer.
Preferably, the probe of the spectrometer comprises a spectrometer sensor probe or a high speed photo-probe or a light intensity detector or an intensity detector.
Preferably, the distance between the central axis of the first lens 2 and the central axis of the second lens 4 is adjustable.
Preferably, the object image relationship between the first lens 2 of the imaging unit and the area array optical sensor 3 satisfies the basic clear imaging condition, and the area array optical sensor 3 can acquire the entire field of view BD of the display panel 5, i.e., the size of the display panel 5.
Preferably, when the probe of the spectrometer is required to measure the center C of the display panel 5, the distance from the probe of the spectrometer to the nearest edge of the imaging chip is half of the size of the display panel 5, that is, BD/2.
It will be understood by those skilled in the art that the foregoing is merely exemplary of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, combinations, alternatives, and equivalents falling within the spirit and scope of the invention.
Claims (10)
1. A display panel measuring method is characterized in that:
the area array optical sensor (3) acquires image information of the display panel based on the first lens (2);
meanwhile, the single-point measuring probe (6) acquires optical information of a single-point target position on a display panel based on a second lens (4), and the single-point measuring probe (6) deviates from the optical axis of the second lens (4) on the image plane of the second lens (4) and is arranged far away from the area array optical sensor (3);
the single-point target position of the display panel is positioned in the intersection area of the visual field of the first lens (2) and the visual field of the second lens (4);
completing analysis of the display panel based on the image information and the optical information.
2. The display panel measuring method according to claim 1, characterized in that: the single-point measuring probe (6) is a flicker probe, flicker information of the display panel is obtained based on the flicker probe, and the quality of the display panel is analyzed based on the flicker information and the image information.
3. The display panel measuring method according to claim 1, characterized in that: the single-point measuring probe (6) is a single-point standard brightness and/or chromaticity measuring component, and a brightness and/or chromaticity measured value of the central point of the display panel is obtained based on the single-point standard brightness and/or chromaticity measuring component;
and acquiring the area array brightness and/or chromatic value of the display panel based on the image information, and correcting the area array brightness and/or chromatic value of the display panel based on the brightness and/or chromatic value of the central point of the display panel to obtain the corrected area array brightness and/or chromatic value of the display panel.
4. The display panel measuring method according to claim 3, characterized in that: the single-point standard brightness and/or chromaticity measuring part acquires the brightness and/or chromaticity measured value of the center point of the display panel and/or acquires the brightness and/or chromaticity measured values of other positions of the display panel, and corrects the area array brightness and/or chromaticity value of the display panel based on the brightness and/or chromaticity measured value of the center point of the display panel and/or other positions of the display panel.
5. The display panel measuring method according to claim 3, characterized in that: the control device controls the sensor chip corresponding to the single-point standard brightness and/or chromaticity measuring component to move, so that the single-point standard brightness and/or chromaticity measuring component acquires the brightness and/or chromaticity measured values of a plurality of points on the display panel in a time-sharing mode, and the area array brightness and/or chromaticity value of the display panel is corrected according to the brightness and/or chromaticity measured values of the plurality of points.
6. The display panel measuring method according to any one of claims 1 to 5, wherein:
comprises a shell (1);
a first lens (2) is arranged on the shell (1), and an area array optical sensor (3) corresponding to the first lens (2) is arranged in the shell (1);
the shell (1) is further provided with a second lens (4), and a single-point measuring probe (6) corresponding to the second lens (4) is arranged in the shell (1).
7. The display panel measuring method according to claim 1, characterized in that: the intersection region includes at least a center point of a field of view of the first lens.
8. The display panel measuring method according to claim 1, characterized in that: the single-point measuring probe (6) is positioned at the position of the center point of the display panel relative to the conjugate image point of the second lens (4).
9. The display panel measuring method according to claim 1, characterized in that: the display panel is positioned in the visual field of the first lens and is partially positioned in the intersection area.
10. The display panel measuring method according to claim 1, characterized in that: the central shaft of the first lens (2), the central shaft of the photosensitive surface of the area array optical sensor (3) and the central shaft of the display panel are coaxially arranged.
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| CN202210084290.7A CN114112944A (en) | 2022-01-25 | 2022-01-25 | Display panel measuring method |
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| CN202210084290.7A CN114112944A (en) | 2022-01-25 | 2022-01-25 | Display panel measuring method |
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| CN111521617A (en) * | 2020-04-30 | 2020-08-11 | 上海御微半导体技术有限公司 | Optical detection apparatus, control method of optical detection apparatus, and storage medium |
| CN113218900A (en) * | 2021-05-07 | 2021-08-06 | 江苏凤凰通达印刷有限公司 | Book printing quality detection system |
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2022
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0645008A1 (en) * | 1992-06-09 | 1995-03-29 | Luxtron Corporation | Endpoint detection technique using signal slope determinations |
| CN104266969A (en) * | 2014-09-18 | 2015-01-07 | 电子科技大学 | Infrared and terahertz detection device |
| CN104702813A (en) * | 2015-02-11 | 2015-06-10 | 杭州载力科技有限公司 | Multi-CCD spliced scanning mechanism and image processing method through same |
| CN107170911A (en) * | 2017-06-23 | 2017-09-15 | 深圳市华星光电技术有限公司 | The aging testing system and method for a kind of display panel |
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| CN113218900A (en) * | 2021-05-07 | 2021-08-06 | 江苏凤凰通达印刷有限公司 | Book printing quality detection system |
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Application publication date: 20220301 |