CN111530771A - Analysis method for rapidly grading colors of STN liquid crystal display - Google Patents
Analysis method for rapidly grading colors of STN liquid crystal display Download PDFInfo
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- CN111530771A CN111530771A CN202010404333.6A CN202010404333A CN111530771A CN 111530771 A CN111530771 A CN 111530771A CN 202010404333 A CN202010404333 A CN 202010404333A CN 111530771 A CN111530771 A CN 111530771A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
- B07C5/362—Separating or distributor mechanisms
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Abstract
The invention discloses an analysis method for rapidly grading colors of an STN liquid crystal display, which comprises the following steps: step S1, presetting inspection parameters including control parameters and comparison parameters; step S2, placing the STN liquid crystal screen in a detection device and starting detection; the detection equipment comprises a detection table, a feeding mechanism, a positioning mechanism, a detection mechanism and a discharging mechanism; step S3, after the STN liquid crystal screen is transferred in place, continuously collecting data of the STN liquid crystal screen according to the control parameters; step S4, recording and processing all the collected data; step S5, judging the color of the current STN liquid crystal screen according to the contrast parameters and grading; and step S6, sorting the STN liquid crystal screen according to the detection result. The color of the STN liquid crystal screen is detected through a plurality of angles, automatic grading is realized by matching with automatic equipment, manual grading is replaced, grading consistency is realized, the detection is quick and efficient, and the detection effect is good.
Description
Technical Field
The invention relates to the technical field of STN liquid crystal screen detection, in particular to an analysis method for rapidly grading colors of an STN liquid crystal screen.
Background
In the production process of the STN liquid crystal screen, under the condition that the thickness control of the STN liquid crystal screen box is inaccurate, the thickness deviation of the liquid crystal layer can be sensitively reflected to the change of different colors due to the double refraction effect. For example, according to the design of conventional direct display products, the color of the glass of the STN lcd panel after the polarizer is attached is off white, but the color of the glass with a thinner cell thickness is slightly greenish or bluish, and the color of the glass with a thicker cell thickness is slightly yellowish or reddish. In order to keep the color of the glass with various box thicknesses consistent, the slicing angle of the polarizer is finely adjusted in production, the angle of the polarizer is larger or smaller than the designed value, and the thinner or thicker glass is compensated respectively, so that the glass with various box thicknesses is finally in a white color.
Therefore, the STN liquid crystal screen is graded according to the color of glass before being pasted, so that the polaroids with corresponding compensation amount can be matched in batch pasting.
At present, the STN liquid crystal screen industry adopts a manual operation to detect the color of the STN liquid crystal screen, and the polarizer is set to be the most sensitive angle of an individual according to the feeling to detect the color cast condition of the STN liquid crystal screen, but the method has the following problems:
1. when the color of the STN liquid crystal screen is detected from only one fixed angle, the color cast condition of each direction of the STN liquid crystal screen is difficult to judge;
2. depending on manual inspection, the inspection method, deflection angle and visual difference of each person are different, and inspection consistency cannot be realized, so that quality inspection effects are uneven and consistency is poor;
3. it is difficult to obtain a clear color cast value output, only the color steps of the STN lcd panel can be roughly classified, the color cast direction of the STN lcd panel cannot be accurately analyzed, and a quantitative value of the color cast of the STN lcd panel cannot be obtained.
Accordingly, the prior art is deficient and needs improvement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an analysis method for rapidly grading colors of an STN liquid crystal screen.
The technical scheme of the invention is as follows:
an analysis method for rapidly grading colors of an STN liquid crystal screen comprises the following steps:
step S1, presetting inspection parameters; wherein the inspection parameters comprise control parameters and comparison parameters;
step S2, placing the STN liquid crystal screen to be detected on detection equipment, and starting detection;
the detection equipment comprises a detection table, and a feeding mechanism, a positioning mechanism, a detection mechanism and a discharging mechanism which are arranged on the detection table;
step S3, after the STN liquid crystal screen is transferred in place, continuously collecting data of the STN liquid crystal screen according to the control parameters;
step S4, recording and processing all the collected data;
step S5, judging the color gear of the current STN liquid crystal screen according to the contrast parameters;
and step S6, sorting the STN liquid crystal screen according to the detection result.
Further, the feeding mechanism in step S2 includes any one of a belt type conveying mechanism, a roller type conveying mechanism, a platform type conveying mechanism, and a robot conveying mechanism for transferring the STN liquid crystal panel to be inspected to the positioning mechanism.
Further, the positioning mechanism in step S2 includes a second servo motor disposed on the inspection stage, and a carrying stage disposed above the second servo motor; the output end of the second servo motor is connected with the detection device; one side of the bearing table is attached to a belt arranged on the driven wheel, and the upper surface of the bearing table is flush with the upper surface of the belt; the bearing table upper surface is provided with limit baffle for prevent that the STN LCD screen from following the bearing table roll-off, play a location and spacing effect.
Further, the detection mechanism described in step S2 includes a light source and a detection device; the light source is arranged on the detection table above the bearing table; the detection device is arranged on the detection table and connected with a computer and used for detecting color grading of the STN liquid crystal screen; the front side of the detection device is also provided with a polaroid, and the polaroid is connected with the output end of the second servo motor;
the detection device is any one of a spectrometer or a chromatograph, and the preset contrast parameters correspondingly comprise a spectrum parameter, a chromatogram parameter and a brightness parameter.
Further, the step S3 is implemented by transferring the STN liquid crystal screen to be detected to a carrying table through a belt, driving the polarizer connected to the second servo motor to rotate at a constant speed by 360 °, and continuously acquiring color data of the STN liquid crystal screen to be detected according to control parameters through a spectrometer or a chromatograph;
the control parameter refers to a time parameter corresponding to every N degrees of rotation of the polaroid, wherein the value range of N is 0.1-5 degrees.
Further, the step S4 is implemented by acquiring and analyzing data in real time by a spectrometer or a chromatograph according to the control parameters, and recording the spectrum/chromatographic peak value and the brightness value of each angle of the STN liquid crystal screen analyzed by the spectrometer/chromatograph by the computer.
Further, the step S5 is implemented by comparing the difference between the spectrum/spectrum peak value and the brightness value of each angle recorded by the computer and the preset contrast parameter, and grading the color and/or brightness of the liquid crystal screen according to the conditions set by the user.
Further, the step S6 is implemented by controlling, by the computer, the blanking mechanism to sort the STN lcd panel that has been detected to the corresponding gear sorting location according to the detection result.
By adopting the scheme, the invention has the following beneficial effects:
1. according to the invention, the color gears of the STN liquid crystal screen are inspected through a plurality of angles, automatic inspection is realized by matching with automatic equipment, manual grading is replaced, inspection consistency is realized, inspection is rapid and efficient, and the inspection effect is good;
2. in the preferred scheme, the color cast numerical values of the STN liquid crystal screen at all angles can be obtained and recorded, so that the color cast direction and the quantitative numerical value of the color cast of the STN liquid crystal screen can be conveniently analyzed, and the classification accuracy of the STN liquid crystal screen is improved; on the other hand, the color cast quantitative value is complete, so that a manufacturer can be helped to find and analyze process problems in the STN liquid crystal screen production process in time, correct the process problems in time, reduce production loss and improve benefits.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic flow chart of an analysis method for rapidly grading STN liquid crystal screen colors according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Referring to fig. 1, the invention provides an analysis method for rapidly grading STN liquid crystal screen colors, comprising the following steps:
step S1, presetting inspection parameters; wherein the inspection parameters comprise control parameters and comparison parameters;
step S2, placing the STN liquid crystal screen to be detected on detection equipment, and starting detection;
the detection equipment comprises a detection table, and a feeding mechanism, a positioning mechanism, a detection mechanism and a discharging mechanism which are arranged on the detection table;
step S3, after the STN liquid crystal screen is transferred in place, continuously collecting data of the STN liquid crystal screen according to the control parameters;
step S4, recording and processing all the collected data;
step S5, judging the color gear of the current STN liquid crystal screen according to the contrast parameters;
step S6, sorting the STN liquid crystal screen according to the detection result;
the step 3 to the step S6 are repeated, so that the color shift of the STN liquid crystal screen can be detected in batch.
In this embodiment, the feeding mechanism in step S2 may be any one of a belt type conveying mechanism, a roller type conveying mechanism, a platform type conveying mechanism or a robot conveying mechanism. As a preferred embodiment, the feeding mechanism in step S2 is a belt type conveying mechanism; the belt type conveying mechanism comprises a first servo motor arranged on the detection table, a driving wheel connected with the output end of the first servo motor, a driven wheel matched with the driving wheel, and belts arranged on the driving wheel and the driven wheel, and is used for transferring the STN liquid crystal screen to be detected to the positioning mechanism.
In this embodiment, the positioning mechanism in step S2 includes a second servo motor vertically disposed on the inspection stage, and a carrying stage disposed above the second servo motor; the output end of the second servo motor is connected with the detection device; one side of the bearing table is attached to a belt arranged on the driven wheel, and the upper surface of the bearing table is flush with the upper surface of the belt; the bearing table upper surface is provided with limit baffle for prevent that the STN LCD screen from following the bearing table roll-off, play a location and spacing effect.
In the present embodiment, the detection mechanism described in step S2 includes a light source and a detection device; the light source is arranged on the detection table above the bearing table; the detection device is arranged on the detection table and connected with the computer and used for detecting the color gear of the STN liquid crystal screen; the front side of the detection device is also provided with a polaroid, and the polaroid is connected with the output end of the second servo motor;
further, the detection device may be any one of a spectrometer or a chromatograph, and the preset contrast parameters include a spectrum parameter, a chromatogram parameter, and a brightness parameter.
In this embodiment, the blanking mechanism described in step S2 is a six-axis robot provided with suction cups.
In this embodiment, the step S3 is implemented by transferring the STN liquid crystal screen to be detected to a carrying table through a belt, driving the polarizer connected to the second servo motor to rotate at a constant speed by 360 °, and continuously acquiring color data of the STN liquid crystal screen to be detected according to control parameters through a spectrometer or a chromatograph;
it is worth mentioning that, in order to increase the test speed, the rotation angle of the polarizer may be rotated by ± 15 ° to ± 90 ° only in the direction in which the color change is most significant, and does not have to be rotated by 360 °.
Further, the control parameter refers to a time parameter corresponding to each N-degree rotation of the polarizer, where a value range of N is between 0.1 and 5 degrees, that is, each N-degree rotation of the polarizer, the spectrometer or the chromatograph collects color data once.
In this embodiment, step S4 is implemented by acquiring and analyzing data in real time by a spectrometer or a chromatograph according to the control parameters, and recording the spectrum/chromatographic peak and brightness values of each angle of the STN liquid crystal panel analyzed by the spectrometer/chromatograph by a computer.
In this embodiment, the step S5 is implemented by comparing the difference between the spectrum/spectrum peak value and the brightness value of each angle recorded by the computer and the preset contrast parameter, and grading the color and/or brightness of the liquid crystal screen according to the conditions set by the user;
further, the gears set by the user are divided into five types. One is a main gear; secondly, the gear is an acceptable green/blue gear; thirdly, the gear is an acceptable yellow/red gear; fourthly, the gear is an unacceptable green/blue gear; and fifthly, the gear is an unacceptable yellow/red gear. The different gears are divided according to the color difference, and the size of the color difference is set by a user according to the actual situation.
In this embodiment, the step S6 is realized by controlling the blanking mechanism to sort the detected STN lcd panel to the sorting position of the corresponding gear according to the detection result.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the color gears of the STN liquid crystal screen are inspected through a plurality of angles, automatic inspection is realized by matching with automatic equipment, manual grading is replaced, inspection consistency is realized, inspection is rapid and efficient, and the inspection effect is good;
2. in the preferred scheme, the color cast numerical values of the STN liquid crystal screen at all angles can be obtained and recorded, so that the color cast direction and the quantitative numerical value of the color cast of the STN liquid crystal screen can be conveniently analyzed, and the classification accuracy of the STN liquid crystal screen is improved; on the other hand, the color cast quantitative value is complete, so that a manufacturer can be helped to find and analyze process problems in the STN liquid crystal screen production process in time, correct the process problems in time, reduce production loss and improve benefits.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An analysis method for rapidly grading colors of an STN liquid crystal screen is characterized by comprising the following steps:
step S1, presetting inspection parameters; wherein the inspection parameters comprise control parameters and comparison parameters;
step S2, placing the STN liquid crystal screen to be detected on detection equipment, and starting detection;
the detection equipment comprises a detection table, and a feeding mechanism, a positioning mechanism, a detection mechanism and a discharging mechanism which are arranged on the detection table;
step S3, after the STN liquid crystal screen is transferred in place, continuously collecting data of the STN liquid crystal screen according to the control parameters;
step S4, recording and processing all the collected data;
step S5, judging the color gear of the current STN liquid crystal screen according to the contrast parameters;
and step S6, sorting the STN liquid crystal screen according to the detection result.
2. The method according to claim 1, wherein the feeding mechanism in step S2 comprises any one of a belt-type conveying mechanism, a roller-type conveying mechanism, a platform-type conveying mechanism and a manipulator conveying mechanism for transferring the STN lcd to be tested to the positioning mechanism.
3. The method for analyzing STN lcd color in fast-speed manner according to claim 2, wherein the positioning mechanism in step S2 includes a second servo motor disposed on the inspection table, and a carrying table disposed above the second servo motor; the output end of the second servo motor is connected with the detection device; one side of the bearing table is attached to a belt arranged on the driven wheel, and the upper surface of the bearing table is flush with the upper surface of the belt; the bearing table upper surface is provided with limit baffle for prevent that the STN LCD screen from following the bearing table roll-off, play a location and spacing effect.
4. The method for analyzing STN LCD screen color in rapid stages according to claim 3, wherein the detection mechanism in step S2 comprises a light source and a detection device; the light source is arranged on the detection table above the bearing table; the detection device is arranged on the detection table and connected with a computer and used for detecting color grading of the STN liquid crystal screen; the front side of the detection device is also provided with a polaroid, and the polaroid is connected with the output end of the second servo motor;
the detection device is any one of a spectrometer or a chromatograph, and the preset contrast parameters correspondingly comprise a spectrum parameter, a chromatogram parameter and a brightness parameter.
5. The method according to claim 4, wherein the step S3 is implemented by transferring the STN LCD to be detected onto a carrying table through a belt, driving a polarizer connected with the second servo motor to rotate at a constant speed of 360 degrees by the second servo motor, and continuously acquiring color data of the STN LCD to be detected according to control parameters through a spectrometer or a chromatograph;
the control parameter refers to a time parameter corresponding to every N degrees of rotation of the polaroid, wherein the value range of N is 0.1-5 degrees.
6. The method as claimed in claim 5, wherein the step S4 is implemented by acquiring and analyzing data in real time by a spectrometer or a chromatograph according to the control parameters, and recording the spectrum/spectrum peak and brightness values of the STN lcd at each angle by the spectrometer/chromatograph.
7. The method as claimed in claim 6, wherein the step S5 is implemented by comparing the difference between the spectrum/spectrum peak value and the brightness value recorded by the computer at each angle and the preset contrast parameter, and grading the color and/or brightness of the liquid crystal screen according to the conditions set by the user.
8. The method for analyzing STN lcd color grading rapidly according to claim 7, wherein the step S6 is implemented by the computer controlling the blanking mechanism to sort the STN lcd color testing completed to the corresponding grade sorting location according to the testing result.
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Application publication date: 20200814 |