Display screen detection device and detection system

Abstract

The invention provides a display screen detection device and system, and relates to the field of display screen detection, and the device comprises a first detection module which is used for collecting the demand detection data of a display screen; the intelligent analysis module is electrically connected with the detection module I and is used for analyzing the required detection data; the conveying and positioning module is used for driving the display screen to move among different detection units of the first detection module and positioning the position of the display screen before detection is started; the second detection module is used for detecting parameters of a light source of the optical detection unit, and the parameters of the light source comprise the surface temperature of the light source, the light intensity of the light source and the light intensity control parameter of the light source; the automatic control device is electrically connected with the first detection module and the second detection module, and the automatic control device comprises a light intensity control module. The second detection module monitors the surface temperature, light intensity and control parameters of the light source in real time, the light intensity control module of the automatic control device is combined, the light intensity is automatically adjusted, and the detection effect is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of display screen detection, and in particular to a display screen detection device and a detection system. Background Art

[0002] With the rapid evolution of display technology, displays have become deeply integrated into consumer electronics, smart displays, and other fields. As market requirements for displays increase, display testing has become a core link in ensuring product quality.

[0003] The optical inspection of existing display screen inspection devices is usually carried out with a fixed light intensity, and the light intensity is not adaptively adjusted according to the use status of the light source, which easily affects the inspection effect. Summary of the Invention

[0004] The present invention provides a display screen detection device and a detection system to solve the technical problems raised by the above background technology.

[0005] In order to solve the above technical problems, the present invention discloses a display screen detection device, comprising: Detection module 1, used to collect required detection data of the display screen, the detection module 1 includes: an optical detection unit and an electrical detection unit; an intelligent analysis module, electrically connected to the detection module, and configured to analyze the demand detection data; The conveying and positioning module is used to move the display screen between different detection units of the detection module 1 and locate the position of the display screen before the detection begins; Detection module 2, used to detect parameters of the light source of the optical detection unit, the parameters of the light source including: surface temperature of the light source, light intensity of the light source, and light intensity control parameters of the light source; The automatic control device is electrically connected to the detection module 1 and the detection module 2, and the automatic control device includes a light intensity control module.

[0006] Preferably, the optical detection unit: acquires the brightness, chromaticity and bad pixel data of the display screen by emitting light sources of different wavelengths and capturing the reflected / transmitted light signals of the display screen; Electrical detection unit: electrically connected to the display pins through a probe array to detect the display driving voltage, current and pixel response time.

[0007] Preferably, it further includes: a mechanical detection unit: detecting the compressive strength and deformation data of the display screen by applying a preset pressure to the surface of the display screen.

[0008] Preferably, the intelligent analysis module includes: Data receiving unit: used to receive the required detection data collected and transmitted by the detection module 1; Data preprocessing unit: used to preprocess the demand detection data; Defect recognition unit: Extracts features from pre-processed demand detection data based on a deep learning model to identify optical defects, electrical anomalies, and mechanical damage on the display screen; Decision-making unit: Generates a test report based on the identification results of the defect identification unit.

[0009] Preferably, a cloud database is also included to store historical detection data of display screens of different models.

[0010] Preferably, the data preprocessing unit includes: The data cleaning subunit is used to clean the demand detection data. Specifically, it uses statistical analysis algorithms to identify outliers in the demand detection data, uses interpolation algorithms to fill in missing data in the demand detection data, and uses filtering algorithms to remove invalid fluctuation data introduced by environmental interference and sensor noise. The data format conversion subunit is used to unify the format of the required detection data and convert the data output by different types of sensors into a preset standard data format; The normalization processing subunit is used to normalize the cleaned and converted demand detection data.

[0011] Preferably, it further includes: a storage module, the storage module including: The first storage unit stores the type identification information of the display screen, and stores the corresponding detection light source information for each type of display screen, and stores the light intensity-detection accuracy model of the reference detection wavelength of each detection light source corresponding to each type of display screen; The second storage unit stores a fitting curve of the total usage time of each detection light source corresponding to each type of display screen and the theoretical light intensity efficiency; The light intensity control module includes: The first construction unit is used to construct a fitting curve of total usage time-actual light intensity efficiency of each detection light source corresponding to the current batch of display screens within the latest preset period; The second construction unit is used to construct a time-actual surface temperature fitting curve within a recent preset period of time for each detection light source corresponding to the current batch of display screens; The first acquisition unit is used to obtain the target detection accuracy range of the current batch of display screens; A first calculating unit: configured to determine a first predicted light intensity efficiency based on the second storage unit and the first constructing unit; Early warning unit: when any of the first predicted light intensity efficiencies is less than the corresponding preset light intensity efficiencies, an early warning is issued; Determination unit: used to determine the primary screening light intensity of the current light source based on the target detection accuracy range of the current batch of display screens and the light intensity-detection accuracy model of the reference detection wavelength corresponding to the current light source; A second calculation unit: configured to determine the maximum allowable light intensity of the current light source based on the first calculation unit and the second construction unit; Screening unit: used to screen the secondary screening light intensities that are less than the maximum allowable light intensity from the primary screening light intensity of the current light source, and select the average value of the smallest Z secondary screening light intensities as the current light source target light intensity; Control unit: used to control the actual light intensity of each detection light source corresponding to the current batch of display screens to the corresponding target light intensity, and perform optical detection of the current batch of display screens.

[0012] Preferably, the first calculation unit calculates based on the following formula: ; is the first predicted light intensity efficiency of the current light source; M is the total number of horizontal coordinates selected in the actual light intensity efficiency fitting curve of the total usage time of the current light source in the most recent preset period; The ordinate corresponding to the i-th abscissa selected from the fitting curve of the total usage time of the current light source within the most recent preset period - actual light intensity efficiency; The ordinate corresponding to the i-th abscissa in the total usage time of the current light source - theoretical light intensity efficiency fitting curve; Determine the total usage time of the current light source corresponding to the light intensity efficiency of the current light source for the most recent detection; The total required detection time for the current light source detection of the current batch of display screens; for The corresponding ordinate in the total usage time-theoretical light intensity efficiency fitting curve of the current light source; 、 are the first weight and the second weight respectively.

[0013] Preferably, the second calculation unit calculates based on the following formula: ; Among them, min is the minimum value; is the first predicted light intensity efficiency of the current light source; is the maximum allowable input power of the current light source; The maximum allowable adjusted power of the current light source is determined based on the actual surface temperature corresponding to the maximum time in the time-actual surface temperature fitting curve of the current light source within the most recent preset period, the input power of the current light source within the most recent preset period, and the average slope of the time-actual surface temperature fitting curve of the current light source within the most recent preset period.

[0014] A display screen detection system comprises the display screen detection device.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The optical inspection unit captures brightness, chromaticity and bad pixel data through a multi-wavelength light source, the electrical inspection unit monitors the driving voltage / current through a probe array, and the mechanical inspection unit applies a preset pressure to test the compressive strength, forming an "optical-electrical-mechanical" full-dimensional inspection system. Compared with traditional single optical inspection, the defect coverage rate is improved.

[0016] The second detection module monitors the surface temperature, light intensity and control parameters of the light source in real time, and combines with the light intensity control module of the automatic control device to automatically adjust the light intensity to ensure the detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of the present invention. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0020] The present invention provides a display screen detection device, such as Figure 1 Shown, including: Detection module 1, used to collect required detection data of the display screen, the detection module 1 includes: an optical detection unit and an electrical detection unit; an intelligent analysis module, electrically connected to the detection module, and configured to analyze the demand detection data; The conveying and positioning module is used to move the display screen between different detection units of the detection module 1 and locate the position of the display screen before the detection begins; Detection module 2, used to detect parameters of the light source of the optical detection unit, the parameters of the light source including: surface temperature of the light source, light intensity of the light source, and light intensity control parameters of the light source; The automatic control device is electrically connected to the detection module 1 and the detection module 2, and the automatic control device includes a light intensity control module.

[0021] Preferably, the optical detection unit: acquires the brightness, chromaticity and bad pixel data of the display screen by emitting light sources of different wavelengths and capturing the reflected / transmitted light signals of the display screen; Electrical detection unit: electrically connected to the display pins through a probe array to detect the display driving voltage, current and pixel response time.

[0022] Preferably, it further includes: a mechanical detection unit: detecting the compressive strength and deformation data of the display screen by applying a preset pressure to the surface of the display screen.

[0023] Preferably, the intelligent analysis module includes: Data receiving unit: used to receive the required detection data collected and transmitted by the detection module 1; Data preprocessing unit: used to preprocess the demand detection data; Defect recognition unit: This unit extracts features from pre-processed demand detection data based on a deep learning model to identify optical defects, electrical anomalies, and mechanical damage on the display screen. Decision-making unit: Generates a test report based on the identification results of the defect identification unit.

[0024] Preferably, a cloud database is also included to store historical detection data of display screens of different models.

[0025] Preferably, the data preprocessing unit includes: The data cleaning subunit is used to clean the demand detection data. Specifically, it uses statistical analysis algorithms to identify outliers in the demand detection data, uses interpolation algorithms to fill in missing data in the demand detection data, and uses filtering algorithms to remove invalid fluctuation data introduced by environmental interference and sensor noise. The data format conversion subunit is used to unify the format of the required detection data and convert the data output by different types of sensors into a preset standard data format; The normalization processing subunit is used to normalize the cleaned and converted demand detection data.

[0026] The beneficial effects of the above technical solution are: The optical inspection unit captures brightness, chromaticity and bad pixel data through a multi-wavelength light source, the electrical inspection unit monitors the driving voltage / current through a probe array, and the mechanical inspection unit applies a preset pressure to test the compressive strength, forming an "optical-electrical-mechanical" full-dimensional inspection system. Compared with traditional single optical inspection, the defect coverage rate is improved.

[0027] The second detection module monitors the surface temperature, light intensity and control parameters of the light source in real time, and combines with the light intensity control module of the automatic control device to automatically adjust the light intensity to ensure the detection effect.

[0028] Example 2, based on Example 1, Storage module, the storage module includes: The first storage unit stores the type identification information of the display screen, and stores the corresponding detection light source information for each type of display screen, and stores the light intensity-detection accuracy model of the reference detection wavelength of each detection light source corresponding to each type of display screen; The second storage unit stores a fitting curve of the total usage time-theoretical light intensity efficiency of each detection light source corresponding to each type of display screen.

[0029] The light intensity control module includes: The first construction unit is used to construct a fitting curve of the total usage time of each detection light source corresponding to the current batch of display screens within the most recent preset period - actual light intensity efficiency; the light intensity efficiency is light intensity divided by input power; The second construction unit is used to construct a time-actual surface temperature fitting curve within a recent preset period of time for each detection light source corresponding to the current batch of display screens; The first acquisition unit is used to obtain the target detection accuracy range of the current batch of display screens; A first calculating unit: configured to determine a first predicted light intensity efficiency based on the second storage unit and the first constructing unit; Early warning unit: when any of the first predicted light intensity efficiencies is less than the corresponding preset light intensity efficiencies, an early warning is issued; Determining unit: used to determine the primary screening light intensity of the current light source based on the target detection accuracy range of the current batch of display screens and the light intensity-detection accuracy model of the reference detection wavelength corresponding to the current light source; the light intensity corresponding to the target detection accuracy range of the current batch of display screens in the light intensity-detection accuracy model of the reference detection wavelength corresponding to the current light source is the primary screening light intensity; A second calculation unit is used to determine the maximum allowable light intensity I of the current light source based on the first calculation unit and the second construction unit; ; Among them, min is the minimum value; is the first predicted light intensity efficiency of the current light source; is the maximum allowable input power of the current light source; The actual surface temperature corresponding to the maximum time in the time-actual surface temperature fitting curve within the most recent preset period based on the current light source , the input power Q of the current light source in the most recent preset period, the average slope of the time-actual surface temperature fitting curve of the current light source in the most recent preset period Determine the maximum allowable adjusted power of the current light source; ; is the maximum allowable operating temperature of the current light source, for The corresponding adjustment coefficient (the value is greater than 0 and less than 1), The larger the value, the larger the value. The temperature difference range-slope range-adjustment coefficient mapping table can be determined based on the experiment, and the specific adjustment coefficient can be determined based on the difference table; Screening unit: used to screen the secondary screening light intensities that are less than the maximum allowable light intensity from the primary screening light intensity of the current light source, and select the average value of the smallest Z secondary screening light intensities as the current light source target light intensity; Control unit: used to control the actual light intensity of each detection light source corresponding to the current batch of display screens to the corresponding target light intensity, and perform optical detection of the current batch of display screens.

[0030] The first calculation unit is based on the following formula: ; is the first predicted light intensity efficiency of the current light source; M is the total number of horizontal coordinates selected in the actual light intensity efficiency fitting curve of the total usage time of the current light source in the most recent preset period; The ordinate corresponding to the i-th abscissa selected from the fitting curve of the total usage time of the current light source within the most recent preset period - actual light intensity efficiency; The ordinate corresponding to the i-th abscissa in the total usage time of the current light source - theoretical light intensity efficiency fitting curve; Determine the total usage time of the current light source corresponding to the light intensity efficiency of the current light source for the most recent detection; The total required detection time for the current light source detection of the current batch of display screens; for The corresponding ordinate in the total usage time-theoretical light intensity efficiency fitting curve of the current light source; 、 are the first weight and the second weight respectively (both values ​​are greater than 0 and less than 1).

[0031] The beneficial effects of the above technical solution are: Accuracy and stability assurance: By constructing light intensity efficiency and temperature fitting curves and combining them with precision models, the light intensity of the light source is dynamically adjusted to ensure the stability of display screen optical inspection accuracy and adapt to the inspection needs of different types of displays.

[0032] Preventive maintenance: The early warning unit monitors light intensity and efficiency in real time, discovers light source attenuation problems in advance, avoids the impact of light source performance degradation on test results, and reduces the risk of equipment failure.

[0033] Intelligent dynamic control: From initial screening to target light intensity determination, multiple links are combined with historical equipment data (usage time, temperature, etc.) and dynamic calculation of accuracy requirements to optimize light source output and balance detection effect and equipment life.

[0034] Adaptability: The storage unit covers parameters of multiple types of displays and detection light sources. The light intensity control module can be called on demand to adapt to optical detection in different scenarios, improving the versatility of the solution.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A display screen detection device, characterized in that: include: Detection module 1, used to collect required detection data of the display screen, the detection module 1 includes: an optical detection unit and an electrical detection unit; an intelligent analysis module, electrically connected to the detection module, and configured to analyze the demand detection data; The conveying and positioning module is used to move the display screen between different detection units of the detection module 1 and locate the position of the display screen before the detection begins; Detection module 2, used to detect parameters of the light source of the optical detection unit, the parameters of the light source including: surface temperature of the light source, light intensity of the light source, and light intensity control parameters of the light source; The automatic control device is electrically connected to the detection module 1 and the detection module 2, and the automatic control device includes a light intensity control module.

2. A display screen detection device according to claim 1, characterized in that: Optical detection unit: obtains display brightness, color, and bad pixel data by emitting light sources of different wavelengths and capturing the reflected / transmitted light signals from the display; Electrical detection unit: electrically connected to the display pins through a probe array to detect the display driving voltage, current and pixel response time.

3. A display screen detection device according to claim 2, characterized in that: Also includes: Mechanical testing unit: tests the compressive strength and deformation data of the display screen by applying a preset pressure to the surface of the display screen.

4. A display screen detection device according to claim 1, characterized in that: The intelligent analysis module includes: Data receiving unit: used to receive the required detection data collected and transmitted by the detection module 1; Data preprocessing unit: used to preprocess the demand detection data; Defect recognition unit: Extracts features from pre-processed demand detection data based on a deep learning model to identify optical defects, electrical anomalies, and mechanical damage on the display screen; Decision-making unit: Generates a test report based on the identification results of the defect identification unit.

5. The display screen detection device according to claim 1, characterized in that: It also includes a cloud database for storing historical detection data of different models of display screens.

6. A display screen detection device according to claim 4, characterized in that: The data preprocessing unit includes: The data cleaning subunit is used to clean the demand detection data. Specifically, it uses statistical analysis algorithms to identify outliers in the demand detection data, uses interpolation algorithms to fill in missing data in the demand detection data, and uses filtering algorithms to remove invalid fluctuation data introduced by environmental interference and sensor noise. The data format conversion subunit is used to unify the format of the required detection data and convert the data output by different types of sensors into a preset standard data format; The normalization processing subunit is used to normalize the cleaned and converted demand detection data.

7. A display screen detection device according to claim 1, characterized in that: Also includes: Storage module, the storage module includes: The first storage unit stores the type identification information of the display screen, and stores the corresponding detection light source information for each type of display screen, and stores the light intensity-detection accuracy model of the reference detection wavelength of each detection light source corresponding to each type of display screen; The second storage unit stores a fitting curve of the total usage time of each detection light source corresponding to each type of display screen and the theoretical light intensity efficiency; The light intensity control module includes: The first construction unit is used to construct a fitting curve of total usage time-actual light intensity efficiency of each detection light source corresponding to the current batch of display screens within the latest preset period; The second construction unit is used to construct a time-actual surface temperature fitting curve within a recent preset period of time for each detection light source corresponding to the current batch of display screens; The first acquisition unit is used to obtain the target detection accuracy range of the current batch of display screens; A first calculating unit: configured to determine a first predicted light intensity efficiency based on the second storage unit and the first constructing unit; Early warning unit: when any of the first predicted light intensity efficiencies is less than the corresponding preset light intensity efficiencies, an early warning is issued; Determination unit: used to determine the primary screening light intensity of the current light source based on the target detection accuracy range of the current batch of display screens and the light intensity-detection accuracy model of the reference detection wavelength corresponding to the current light source; A second calculation unit: configured to determine the maximum allowable light intensity of the current light source based on the first calculation unit and the second construction unit; Screening unit: used to screen the secondary screening light intensities that are less than the maximum allowable light intensity from the primary screening light intensity of the current light source, and select the average value of the smallest Z secondary screening light intensities as the current light source target light intensity; Control unit: used to control the actual light intensity of each detection light source corresponding to the current batch of display screens to the corresponding target light intensity, and perform optical detection of the current batch of display screens.

8. A display screen detection device according to claim 7, characterized in that: The first calculation unit is based on the following formula: ； is the first predicted light intensity efficiency of the current light source; M is the total number of horizontal coordinates selected in the actual light intensity efficiency fitting curve of the total usage time of the current light source in the most recent preset period; The ordinate corresponding to the i-th abscissa selected from the fitting curve of the total usage time of the current light source within the most recent preset period - actual light intensity efficiency; The ordinate corresponding to the i-th abscissa in the total usage time of the current light source - theoretical light intensity efficiency fitting curve; Determine the total usage time of the current light source corresponding to the light intensity efficiency of the current light source for the most recent detection; The total required detection time for the current light source detection of the current batch of display screens; for The corresponding ordinate in the total usage time-theoretical light intensity efficiency fitting curve of the current light source; 、 are the first weight and the second weight respectively.

9. A display screen detection device according to claim 8, characterized in that: The second calculation unit is calculated based on the following formula: ； Among them, min is the minimum value; is the first predicted light intensity efficiency of the current light source; is the maximum allowable input power of the current light source; The maximum allowable adjusted power of the current light source is determined based on the actual surface temperature corresponding to the maximum time in the time-actual surface temperature fitting curve of the current light source within the most recent preset period, the input power of the current light source within the most recent preset period, and the average slope of the time-actual surface temperature fitting curve of the current light source within the most recent preset period.

10. A display screen detection system, characterized in that: The invention comprises a display screen detection device according to any one of claims 1 to 9.

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