Optical viewing angle measurement device and method

Abstract

A light pattern viewing angle measurement device and a light pattern viewing angle measurement method are disclosed. The method includes: acquiring first image data of image information of a target under test from a first measurement angle; acquiring second image data of image information of the target under test from a second measurement angle; and obtaining light pattern viewing angle information of the target under test based on the first image data and the second image data. The image information is composed of a plurality of pixel information, wherein the plurality of pixel information is obtained sequentially by a one-dimensional line scan, and wherein the first measurement angle and the second measurement angle are different angles for use in measuring the light pattern viewing angle of the light-emitting element of the target under test.

Description

Technical Field

[0001] The present invention provides a light type viewing angle measuring device and a light type viewing angle measuring method, in particular, a light type viewing angle measuring device and a light type viewing angle measuring method which are highly compatible, can measure quickly and have high accuracy when measuring the light type viewing angle of a plurality of arrays of objects to be measured. Prior Art

[0002] Generally, when measuring the brightness of the light-emitting element of the target to be measured, such as the light-emitting waveform of an LED, the measurement is usually performed one by one.

[0003] With the miniaturization of LED components and the increasing demand for inspection of Micro LED panels, the current one-by-one measurement method has poor measurement efficiency, high measurement time and cost.

[0004] In addition, if one wishes to measure the viewing angle of light or the brightness at different angles of the assembled target light-emitting elements, such as the viewing angle of light of a single light-emitting element in a Micro LED panel, it is difficult to measure a single Micro LED in the panel array due to its small size. In general, a method is used to measure the viewing angle of the entire Micro LED panel using a surface light detector. Summary of the invention

[0005] However, the way to measure the entire Micro LED panel is limited by physical principles such as the focal length of the optical element and the lens aberration. When measuring the brightness of the Micro LED panel at different angles, the distances between the optical elements and the optical lens at different positions on the panel are different, which will lead to distortion of the viewing angle measurement results.

[0006] In addition, if one wishes to measure a single Micro LED on a panel, the small size of the single Micro LED will also limit the difficulty in measuring the viewing angle of the light pattern of the single Micro LED.

[0007] Therefore, it is crucial to invent a light viewing angle measurement device and method to solve the viewing angle measurement problem for a single Micro LED in the entire array panel and to achieve accurate, correct and rapid measurement of the viewing angle of a single Micro LED.

[0008] In view of this, the present invention provides a light type viewing angle measurement device and a light type viewing angle measurement method, which can obtain and provide light type viewing angle information of a single light emitting element on an assembled light emitting element array panel for extremely small elements, such as Micro LED, by performing one-dimensional line scanning at different angles.

[0009] One aspect of the present invention provides a light type viewing angle measurement method, which is suitable for being performed by a light type viewing angle measurement device. The light type viewing angle measurement device includes an image capture module. The light type viewing angle measurement method is suitable for measuring image information of a target to be measured, and the image information is related to the light type viewing angle of the target to be measured. The light type viewing angle measurement method includes: capturing a first image data of the image information of the target to be measured at a first measurement angle; capturing a second image data of the image information of the target to be measured at a second measurement angle; obtaining the light type viewing angle information of the target to be measured based on the first image data and the second image data; wherein the image information is composed of a plurality of pixel information, wherein the plurality of pixel information is sequentially obtained by a one-dimensional line scanning method, and wherein the first measurement angle and the second measurement angle are different angles.

[0010] In the above-mentioned light type viewing angle measurement method, there are multiple targets to be measured.

[0011] In the above-mentioned optical viewing angle measurement method, a plurality of targets to be measured are arranged in an array on a plane to be measured.

[0012] The light type viewing angle measurement method as described above further includes: selecting pixel information associated with the target to be measured as an addressing operation of the image information.

[0013] As described above, in the method for measuring the viewing angle of light type, the plurality of pixel information is light intensity information or spectrum information.

[0014] The optical viewing angle measurement method as described above further includes: adjusting the optical response of the image capture module to a response adjustment operation of human visual response.

[0015] In the above-mentioned light type viewing angle measurement method, the image capture module is a linear light sensor.

[0016] As described above, in the method for measuring the light type viewing angle, the light type viewing angle information is a viewing angle radar diagram.

[0017] The optical viewing angle measurement method as described above further includes: an image correction operation for correcting the two-dimensional image error of the image information.

[0018] In the above-mentioned method for measuring the viewing angle of light, the image correction operation includes performing two-dimensional image correction through a correction sample.

[0019] In the above-mentioned method for measuring the viewing angle of light, the image correction operation includes performing two-dimensional image correction according to the features associated with the target to be measured in the image information.

[0020] One aspect of the present invention provides a light type viewing angle measuring device, which is suitable for measuring image information of a target to be measured, wherein the image information is related to the light type viewing angle of the target to be measured, and the light type viewing angle measuring device comprises: a base, which is suitable for carrying the target to be measured; an image capture module, which is suitable for capturing image information of the target to be measured; a moving module, which is suitable for adjusting the relative position between the image capture module and the base, wherein the relative position includes a relative angle and a relative distance; and a processing control module, which is electrically connected to the image capture module and the moving module, wherein the processing control module is suitable for executing the light type viewing angle measuring method as described above, wherein the image capture module is suitable for capturing image information of the target to be measured at the same relative distance and at a plurality of different relative angles.

[0021] One aspect of the present invention provides a light type viewing angle measuring device, which is suitable for measuring image information of a target to be measured, wherein the image information is related to the light type viewing angle of the target to be measured, and the light type viewing angle measuring device comprises: a base, which is suitable for carrying the target to be measured; a plurality of image capture modules, which are suitable for capturing image information of the target to be measured; and a processing control module, which is electrically connected to the plurality of image capture modules, and the processing control module is suitable for executing the light type viewing angle measuring method as described above, wherein the plurality of image capture modules are suitable for capturing image information of the target to be measured at the same relative distance and at a plurality of different relative angles.

[0022] By means of the optical angle measurement device and the optical angle measurement method of the present invention, one-dimensional line scanning is performed on the target to be measured at different measurement angles to capture the image information of the target to be measured at different measurement angles, and the optical angle information of the target to be measured is obtained based on the image information at different measurement angles, so as to achieve the effect of being able to analyze the optical angle information of the brightness of a single target to be measured at different measurement angles, and has the advantages of easy integration of the measurement device and accurate, correct and rapid measurement of the optical angle information of a single target to be measured. Compared with the full imaging being interfered by the focal length and lens aberration of the lens, the optical angle measurement device and the optical angle measurement method of the present invention can also obtain accurate, uniform and standard image information and its optical angle information through point scanning imaging. Simple diagram description

[0023] Figure 1 shows a schematic diagram of a light viewing angle measuring device according to an embodiment of the present invention; Figure 2A shows a schematic front view of the operation of the optical viewing angle measurement method in one embodiment of the present invention; FIG2B shows a three-dimensional schematic diagram of the operation of the optical viewing angle measurement method according to an embodiment of the present invention; FIG2C shows a three-dimensional schematic diagram of the operation of the light type viewing angle measurement method in one embodiment of the present invention; FIG2D shows a three-dimensional schematic diagram of the operation of the light type viewing angle measurement method in one embodiment of the present invention; Figure 3 shows a schematic diagram of light type viewing angle information obtained by a light type viewing angle measurement method in one embodiment of the present invention; FIG4 shows a schematic diagram of a plane to be measured having a plurality of targets to be measured that is to be measured by a method for measuring viewing angle of an optical type in one embodiment of the present invention; Figure 5A shows a front view schematic diagram of the operation of the light type viewing angle measurement method in one embodiment of the present invention; FIG5B shows a three-dimensional schematic diagram of the operation of the light type viewing angle measurement method in one embodiment of the present invention; FIG5C shows a three-dimensional schematic diagram of the operation of the light type viewing angle measurement method in one embodiment of the present invention; FIG5D shows a three-dimensional schematic diagram of the operation of the light type viewing angle measurement method in one embodiment of the present invention; Figure 6 shows a schematic diagram of the selection of addressing operation of the light type viewing angle measurement method in one embodiment of the present invention; Figure 7 shows an operation flow chart of a method for measuring a light viewing angle in accordance with an embodiment of the present invention; FIG. 8 is a flowchart showing an operation of a method for measuring a light type viewing angle according to another embodiment of the present invention. Implementation

[0024] In order to explain the technical content of the present invention in detail, the following is further described in conjunction with the embodiments and the accompanying drawings. It should be noted that in the content of this article, terms such as "first", "second" and "third" are used to distinguish the differences between components, rather than to limit the components themselves or to indicate a specific order of components. In addition, in the content of this article, when a specific number is not specifically indicated, the article "a" refers to one component or more than one component.

[0025] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific embodiments and the accompanying drawings.

[0026] FIG1 is a schematic diagram of a light type viewing angle measuring device in one embodiment of the present invention. One aspect of the present invention is a light type viewing angle measuring device 10, which is suitable for measuring image information of a target to be measured, and the image information is associated with the light type viewing angle of the target to be measured. In one embodiment, the target to be measured is a Micro LED light-emitting element, and the light type viewing angle refers to the viewing angle and brightness when observing the light-emitting element at different angles. It should be noted that the light type viewing angle measuring device of the present invention is also suitable for measuring the light type viewing angle of other types of light-emitting elements, micro light-emitting elements, and light-emitting devices.

[0027] Referring to FIG. 1 , the optical viewing angle measuring device 10 includes a base 110, an image capturing module 120, a moving module 130, and a processing control module 140. The base 110 is suitable for carrying a target 200 to be measured. The image capturing module 120 is suitable for capturing image information of the target 200 to be measured. In one embodiment, the image information may be or include a one-dimensional line scan image, a two-dimensional image, brightness information, spectrum information, etc. In one embodiment, the image capturing module 120 may be a camera, a light detector, a CCD, a CMOS, or other light detector, and its photosensitive chip may be, for example, a two-dimensional array of MxN. In one embodiment, the image capturing module 120 may be a linear light sensor, and for example, its photosensitive chip may be a 1xN long one-dimensional array, so that a line image of a whole 1xN pixel can be collected at one time. In one embodiment, the image capturing module 120 may include a combination of optical path elements, including but not limited to an optical lens, an optical fiber, a coupler, an amplifier, or a combination thereof. In one embodiment, the image capture module 120 in FIG. 1 is illustrated as a light detector with an optical lens, which is used to receive light emitted by the target 200 to be measured. The moving module 130 is suitable for adjusting the relative position of the image capture module 120 and the base 110, wherein the relative position includes but is not limited to the relative angle and the relative distance, that is, the relative angle and / or the relative distance between the image capture module 120 and the target 200 to be measured carried by the base 110 can be adjusted and changed through the moving module 130. In one embodiment, the moving module 130 can be a slide rail, a robot arm, a pulley or a combination thereof. In one embodiment, the moving module 130 can be a piezoelectric displacement platform, a mechanical moving platform, a pulley platform or a combination thereof. It should be noted that the moving module 130 is not limited to being configured as the moving base 110 or the image capture module 120. In one embodiment, the moving module 130 is configured as shown in FIG. 1 to provide a slide rail for the image capture module 120 to move to positions of different measuring angles, and to provide a translation platform for the base 110 to perform two-dimensional translation. In one embodiment, the moving module 130 can also be configured to adjust the placement angle of the base 110 so that the target 200 carried by the moving module 130 has different relative angles with the image capture module 120. The processing control module 140 is electrically connected to the image capture module 120 and the moving module 130. The processing control module 140 is suitable for controlling the moving module 130 to control the image capture module 120 to capture image information of the target 200 at different measuring angles. The processing control module 140 is suitable for obtaining light type viewing angle information of the target 200 according to the image information captured by the image capture module 120 at different measuring angles.The processing control module 140 is also suitable for controlling and adjusting the one-dimensional position of the base 110 through the moving module 130, so that the image capture module 120 scans the two-dimensional image of the entire base 110 in a one-dimensional line scanning manner to obtain a two-dimensional image map of the target 200 to be measured at this measurement angle, wherein the two-dimensional image map is composed of a plurality of pixel information (i.e., a plurality of two-dimensional image points), wherein the resolution of the plurality of pixel points may be smaller than the physical size and light profile size of the target 200 to be measured according to the properties of the optical lens, the properties of the optical path, the properties of the light source, and the physical properties of the light detector. Specifically, the processing control module 140 may be an electronic device having a storage device and a processor, such as but not limited to a controller, a desktop computer, a notebook computer, a tablet computer, a workstation, a server, a cloud server, a smart phone, etc. .

[0028] Thus, the image acquisition module 120 can measure the image information of the target 200 at different measurement angles, and obtain the light type viewing angle information of the target 200 according to the image information at different measurement angles through the processing control module 140.

[0029] In one embodiment, the optical viewing angle measuring device 10 of the present invention includes a plurality of image capturing modules 120, and does not need to be provided with a moving module 130 for adjusting the image capturing module 120. In one embodiment, it is preferred to set three or more image capturing modules 120 to obtain image information at different angles, and the measurement angle thereof is set to take the normal angle of the target to be measured as 0 degree, and the measurement angle range thereof can be +90 degrees to -90 degrees, and the measurement angle interval thereof can be any selection of positive integers of 1 degree, 2 degrees, 3 degrees, 4 degrees, ..., 90 degrees.

[0030] In one embodiment, the image capture module 120 or the processing control module 140 can further adjust the optical response of the image capture module 120 itself to a response corresponding to human vision, so as to provide light type viewing angle information equivalent to that seen by human vision. In one embodiment, the image capture module 120 is suitable for scanning a two-dimensional image of the target 200 to be measured with a plurality of pixels in a one-dimensional line scanning manner to obtain a two-dimensional image diagram of the target 200 to be measured at this measurement angle, which means that the image capture module 120 only receives line information of a single scanning line (i.e., light of 1xN pixels), rather than receiving surface information of the entire plane where the target 200 to be measured is located at one time. In one embodiment, the image capture module 120 performs a two-dimensional image scan of the target 200 to be measured in a conjugate focus microscope manner.

[0031] Thus, when measuring the light type angle of view of the target 200, the light type angle of view measuring device 10 of the present invention can measure the complete light type angle of view information of a single target 200. Due to the characteristics of single line scanning, it will not be interfered by other environments or other light emitting elements (other targets to be measured). By adopting a one-dimensional line step-by-step scanning method, since it only uses the near-axis part of the optical element, when the image capture module 120 and the plane of the target 200 have an angle difference (not the direction of the line directly above the target) when imaging, it will not be interfered by the focal length and lens aberration of the lens when imaging the entire surface, and accurate, uniform, and standard consistent image information can be obtained.

[0032] FIG2A is a front view schematic diagram showing the operation of the optical viewing angle measurement method in one embodiment of the present invention. One aspect of the present invention is a method for measuring optical viewing angle, which is suitable for being performed by the aforementioned optical viewing angle measurement device. Please refer to FIG2A for a schematic diagram of one embodiment of the present invention, wherein the optical viewing angle measurement method includes capturing first image data of image information of the target 200 to be measured through the image capture module 120 at a first measurement angle (the image capture module 120 at position A); capturing second image data of image information of the target 200 to be measured through the image capture module 120 at a second measurement angle (the image capture module 120 at position B). In addition, by translating the target 200 to be measured carried by the base 110 through the moving module 130 to perform one-dimensional line image scanning, image information with a plurality of pixel information, such as a two-dimensional image map, a two-dimensional grayscale map, and a two-dimensional spectrum map, can be obtained. Thus, the optical viewing angle measurement method can measure and capture the image information of the target 200 at different measurement angles, including brightness information, spectrum information, etc. at different measurement angles, that is, it has a number of image information equal to the number of measurement angles. In one embodiment, the optical viewing angle measurement method can adopt multiple different measurement angles to capture the image of the target 200 to be measured. Please refer to FIG. 2A, which exemplarily provides five different measurement angles (positions A to E) of the optical viewing angle measurement method. Through the above-mentioned mobile module 130 (not shown) or the setting of multiple image capture modules 120, the optical information of the target 200 (such as Micro LED) to be measured can be measured from multiple measurement angles. As shown in FIG. 2A , the angle of the A measurement position is the normal direction of the target to be measured, and its angle can be defined as 0 degrees. The angle of the B measurement position differs from the measurement angle of the A measurement position by θ1, and the angle of the C measurement position differs from the measurement angle of the A measurement position by θ2. In one embodiment, θ1 or θ2 can be from +90 degrees to -90 degrees, and the measurement angle interval can be any selection of 1 degree, 2 degrees, 3 degrees, 4 degrees, 5 degrees, 10 degrees, 15 degrees, 20 degrees, 30 degrees, 45 degrees, 90 degrees, or a positive integer between 0 and 90 degrees. The measurement angle interval can also be set to a decimal according to the resolution requirement. According to different requirements, the measurement angle range can also be extended to 0 to 360 degrees for all-round angle imaging.

[0033] FIG. 2B to FIG. 2D show a three-dimensional schematic diagram of the operation of the optical viewing angle measurement method in one embodiment of the present invention, and FIG. 2B, FIG. 2C, and FIG. 2D represent different measurement angles respectively. Please refer to FIG. 2B, FIG. 2B takes the image capture module 120 at angle A of FIG. 2A as an example, and A1 represents the initial position of the image capture module 120 at angle A, and A2 represents the end position of the image capture module 120 at angle A after scanning. In one embodiment, the image capture module 120 is a linear CCD, that is, it can capture a line image of 1xN pixels at a time, as shown by the dotted line below the image capture module 120. When performing a one-dimensional line scan, the image capture module 120 moves at angle A relative to the target 200 to perform a one-dimensional line scan and obtain a complete scan image under this angle (for example, angle A, positive 0 degrees). Similarly, FIG. 2C and FIG. 2D respectively show examples of the image capture module 120 being at angle B and angle C for one-dimensional line scanning, and B1 and C1 respectively represent initial positions, and B2 and C2 respectively represent end positions after scanning.

[0034] FIG3 is a schematic diagram showing light type viewing angle information obtained by a light type viewing angle measurement method in an embodiment of the present invention. The image information of the target 200 to be measured obtained by the light type viewing angle measurement method in an embodiment of the present invention at multiple measurement angles can be converted into a light type viewing angle information diagram of light intensity and measurement angle. In one embodiment, the light type viewing angle information diagram of the relationship between light intensity and measurement angle is a viewing angle radar diagram.

[0035] Please refer to FIG. 3, which is a diagram of light type viewing angle information of light intensity and measurement angle in one embodiment. In one embodiment, light intensity values at 11 different measurement angles are captured, including measurement angle positions A to E as shown in FIG. 2, and an example thereof is shown in FIG. 3. Thus, by capturing light intensity values according to different measurement angles, the light type viewing angle information of the target 200 to be measured (such as Micro LED) can be obtained.

[0036] FIG. 4 is a schematic diagram showing a plane to be measured with a plurality of targets to be measured to be measured by a method for measuring a viewing angle of a light type in one embodiment of the present invention. In one embodiment, the targets to be measured 200 may be a plurality of targets. In one embodiment, the targets to be measured 200 are arranged in an array on a plane to be measured 250. In one embodiment, for example, an assembled and spliced Micro LED panel, the plane to be measured 250 represents the Micro LED panel, and the target to be measured 200 represents a single Micro LED component. It should be noted that the drawings of the present invention are only for illustration, and the dimensions shown in the drawings are mainly for ease of understanding, and do not limit the application dimensions of the light type measurement device and the light type measurement method disclosed in the present invention.

[0037] FIG5A is a schematic diagram showing the operation of the optical viewing angle measurement method in one embodiment of the present invention. As described above, the optical viewing angle measurement device and the optical viewing angle measurement method of the present invention can capture the image information of the target 200 to be measured from different measurement angles (such as the image capture module 120 at the measurement angle position AE). When there are a plurality of targets 200 to be measured and arranged in an array on the plane 250 to be measured, the optical viewing angle measurement device and the optical viewing angle measurement method of the present invention can first capture the image information of the target 200 to be measured under the focus (as shown by the dotted line) at the first measurement angle (such as position A), and perform a one-dimensional line scan of the target 200 to be measured on the entire plane 250 to be measured by the moving module 130 with a linear light sensor to obtain the first image data of the image information under the first measurement angle, such as a two-dimensional image map, a two-dimensional light intensity information map or a two-dimensional spectrum information map at the measurement angle position A.

[0038] After completing the acquisition of image information at the position of the measurement angle A, the image acquisition module 120 is moved to the second measurement angle (e.g., position B) through the moving module 130 to acquire image information of the target 200 under focus (as shown by the dotted line), and the target 200 on the entire plane 250 is scanned in one dimension through the moving module 130 to obtain second image data of image information under the second measurement angle, such as a two-dimensional image map, a two-dimensional light intensity information map, or a two-dimensional spectrum information map at the measurement angle position B. In one embodiment, it can be applied to more different measurement angles (e.g., positions C, D, E, or other measurement angles between -90 degrees, 0 degrees, and +90 degrees) to obtain more complete light type viewing angle information of the target 200 under different measurement angles.

[0039] FIG. 5B to FIG. 5D show a three-dimensional schematic diagram of the operation of the optical viewing angle measurement method in an embodiment of the present invention, and FIG. 5B, FIG. 5C, and FIG. 5D represent different measurement angles respectively. Please refer to FIG. 5B, FIG. 5B takes the image capture module 120 at angle A of FIG. 5A as an example, and A1 represents the initial position of the image capture module 120 at angle A, and A2 represents the end position of the image capture module 120 at angle A after scanning. In one embodiment, the image capture module 120 is a linear CCD, that is, it can capture a line image of 1xN pixels at a time, as shown by the dotted line below the image capture module 120. When performing a one-dimensional line scan, the image capture module 120 moves relative to the target 200 to perform a one-dimensional line scan and obtain a complete scan image under this angle (for example, angle A, positive 0 degrees). Similarly, FIG. 5C and FIG. 5D respectively show examples of the image capture module 120 being at angle B and angle C for one-dimensional line scanning, and B1 and C1 respectively represent initial positions, and B2 and C2 respectively represent end positions after scanning.

[0040] It should be noted that the aforementioned linear light sensor refers to a sensor that can capture a linear image at a time and perform a one-dimensional line scan in the manner shown in Figures 5B to 5D, for example, a CCD with a 1xN sensor chip array is used to capture a 1xN pixel image. In addition, the linear light sensor is not limited to a sensor with a one-dimensional sensor chip array. A light sensor with MxN sensor chips can also be used, and the signals of some of the chips can be used to achieve the same one-dimensional linear image capture effect and perform scanning. Furthermore, light sensors with sensor chip arrays of any form, any number or any shape can be used as the image capture module 120 of the present invention. Only by selecting a linear range of sensor chips in an appropriate range according to the optical imaging characteristics can the same effect be obtained, and it is within the scope of protection of the present invention. In one embodiment, the pixels of the image capture module 120 can also be combined according to the size of the target 200 to be measured (for example, binning the sensor chip 2x2 as a sensor pixel) to adjust the actual pixel size, pixel number, and image size of the corresponding image. Compared to single-point scanning to form a complete image of the entire target 200 to be tested, one-dimensional line scanning can complete the image of one line at a time and only needs to scan in one-dimensional direction, which greatly improves the efficiency of image scanning and detection, and also overcomes the size limitation and low light collection problem during single-point step scanning.

[0041] In this way, image information of the entire plane 250 to be measured with a plurality of targets 200 to be measured under different measurement angles can be obtained, such as a one-dimensional image map, a two-dimensional image map, a one-dimensional light intensity map, a two-dimensional light intensity map, a one-dimensional spectrum map or a two-dimensional spectrum map, and thus image information of each target 200 to be measured under different measurement angles and its viewing angle map can be obtained. In one embodiment, the information of each pixel point in the spectrum map can include the entire spectrum information, such as the spectrum information of 380nm~780nm, and it can be summed or averaged or processed in other ways as needed for subsequent application of the viewing angle information.

[0042] FIG6 is a schematic diagram showing the selection of the addressing operation of the light type viewing angle measurement method in one embodiment of the present invention. The image information obtained through the light type viewing angle measurement device or the light type viewing angle measurement method of the present invention can be further selected through the addressing operation to select the pixel information associated with the specific target 200 to be measured as the image information of the specific individual target 200 to be measured. Please refer to FIG6 for a top view of the plane 250 to be measured, that is, the complete image information of the plane 250 to be measured obtained according to the aforementioned device or method, such as a two-dimensional image map, a two-dimensional light intensity information map, or a two-dimensional spectrum information map of the plane 250 to be measured. The image information is composed of a plurality of pixels 300 obtained from a one-dimensional line scanning method. Each target 200 to be measured is imaged in a plurality of pixels 300. Through the addressing operation of the light type viewing angle measurement method of an embodiment of the present invention, the pixels 300 associated with a specific target 200 to be measured can be selected as image information. Please refer to Figure 6. In one embodiment, for example, if the target 200 to be measured at the lower left corner of the test plane 250 is to be selected as the target 200 to be specifically analyzed, then the nine pixels 300 associated with it are selected as the selection area 350, and the image information of the nine pixels 300 in the selection area 350 is used as the image information of the specific target 200 to be measured. For example, the light intensity is summed, averaged, the median is taken, or other mathematical operations are used to obtain the image information of the specific target 200 to be measured at this measurement angle. In this way, in the test plane 250 of the entire array of targets 200 to be measured, the target 200 of interest among the multiple targets 200 to be measured can be specifically identified, or the image information of each target 200 to be measured can be specifically identified to obtain the image information of each target 200 to be measured at different measurement angles. Therefore, the effect of obtaining the light type and viewing angle information of each individual target 200 to be measured can be achieved without being affected by other targets 200 to be measured and will not be affected by the physical optical phase difference factors during surface imaging.

[0043] FIG7 is a flowchart showing an operation of a method for measuring a light type viewing angle in an embodiment of the present invention. One aspect of the present invention provides a method for measuring a light type viewing angle, which is suitable for being performed by the aforementioned light type viewing angle measuring device. The method can be specifically completed through operations S710 to S730 as shown in FIG7. The operation numbers are merely examples and do not limit the order of operation.

[0044] In operation S710, first image data of the target to be measured is captured at a first measurement angle. In operation S720, second image data of the target to be measured is captured at a second measurement angle. In operation S730, light type viewing angle information of the target to be measured is obtained according to the first image data and the second image data. The image information is composed of a plurality of pixel information, and the plurality of pixel information is sequentially obtained in a one-dimensional line scanning manner.

[0045] In one embodiment, the plurality of targets to be tested are, for example, a plurality of single Micro LED light-emitting elements in a Micro LED panel.

[0046] In one embodiment, a plurality of objects to be measured are arranged in an array on a plane to be measured. In one embodiment, the plane to be measured is, for example, a Micro LED panel, and individual units of the Micro LED light-emitting elements are arranged in an array on the Micro LED panel.

[0047] In one embodiment, the plurality of pixel information may be light intensity information or spectrum information. In one embodiment, the individual pixel information of the captured image information is, for example, the light intensity value or spectrum information of each scanning point. The spectrum information may be, for example, an array data structure. Each pixel information may include spectrum information of the corresponding light intensity value of each wavelength of interest. In one embodiment, for example, in the visible light range of 380nm to 780nm, each 1nm has an individual corresponding light intensity value, so as to further analyze the light type viewing angle information of the light emitting element of the target to be measured at each wavelength.

[0048] In one embodiment, image capture is performed through an image capture module. In one embodiment, the image capture module is a linear light detector.

[0049] In one embodiment, the light type viewing angle information is a viewing angle radar diagram to clearly analyze the light type viewing angle information of the light emitting element of each target to be measured, as well as its brightness value and trend change at each angle.

[0050] FIG8 is a flowchart showing an operation of a method for measuring a light type viewing angle in another embodiment of the present invention. Another aspect of the present invention provides a method for measuring a light type viewing angle, which is suitable for being performed by the aforementioned light type viewing angle measuring device. The method can be specifically completed through operations S810 to S820, operations S822 to S826, and operation S830 as shown in FIG8. The details of operations S810, S820, and S830 are substantially the same as operations S710, S720, and S730 in FIG7, respectively. The step numbers are merely examples and do not limit the order of operation.

[0051] In operation S822, the two-dimensional image error of the image information is corrected. In one embodiment, in the process of forming image information (e.g., two-dimensional image) by line scanning in a one-dimensional line scanning manner through the image capture module 120, due to factors such as tolerance of the instrument device and the actuation error of the instrument device, when the pixels of the one-dimensional line scanning in the line scanning are spliced to form complete image information, problems such as image misalignment and image edge jaggedness may occur. In addition, if this error is not corrected, when splicing the two-dimensional image, the error will be magnified with the individual rows and columns, thereby causing the image to be completely distorted and unable to distinguish the actual situation of the target to be measured. Therefore, it is necessary to perform an image correction operation on the image information to correct the two-dimensional image error of the image information.

[0052] In one embodiment, the image correction operation includes performing two-dimensional image correction through a calibration sample. In one embodiment, a pre-designed calibration sample, such as a calibration pattern with known dimensions or a standard sample with a ruler, can be used as a calibration sample and placed in the optical angle measurement device of the present invention as a target to be measured. Through the optical angle measurement device and the optical angle measurement method of the present invention, the image information and pixel information of the calibration sample as the target to be measured are first captured from different measurement angles, thereby, the image information with errors can be back-calculated to correct the image information with errors to the real state of the calibration sample, and the tolerance of the instrument device and the actuation error of the instrument device can be corrected accordingly. Then, the error in each measurement of the sample to be measured can be corrected through the back-calculation result to obtain the real image information of the object to be measured.

[0053] In one embodiment, the image correction operation includes performing two-dimensional image correction according to the features associated with the target to be measured in the image information. Compared with the correction using a pre-designed correction sample, the method of performing two-dimensional image correction according to the features associated with the target to be measured in the image information uses the features of the target to be measured itself and / or the features arranged in an array form to perform image correction. In one embodiment, for example, please refer to FIG. 6. When it is known that the target to be measured 200 is neatly arranged on the plane to be measured 250, the arrangement features of the target to be measured itself can be used as a correction standard. For example, when the target to be measured that should be a circle becomes an oblique ellipse during the process of stitching images, it can be known that there is an error translation between the rows and columns of the two-dimensional image. Therefore, the features of the target to be measured can be restored to a circle by correcting the translation between the rows and columns, and the two-dimensional image correction can be performed by the features of the target to be measured itself.

[0054] In operation S824, pixel information associated with the target to be measured is selected as image information. In one embodiment, the method described in FIG. 6 can be adopted. For each target to be measured 200 of interest, pixels 300 associated with the target to be measured 200 of interest are used as image information of the target to be measured 200 of interest, for example, the sum, average, median, etc. of the brightness of all related pixels 300 are used as image information of the target to be measured 200 of interest.

[0055] In operation S826, the optical response of the image capture module is adjusted to the human visual response. In one embodiment, since the optical response mode of the light detector of the image capture module is different from the human visual response mode, its response degree to each wavelength of light is also different. Therefore, in one embodiment, the optical response of the image capture module can be adjusted to the human visual response in advance. In another embodiment, the image information can be adjusted to the image information corresponding to the human visual response after it is captured. In this way, the light type viewing angle information obtained subsequently can correctly correspond to the sensitivity of human vision to the target to be measured.

[0056] By means of the optical angle measuring device and the optical angle measuring method of the present invention, one-dimensional line scanning is performed on the target to be measured at different measuring angles to capture the image information of the target to be measured at different measuring angles, and the optical angle information of the target to be measured is obtained based on the image information at different measuring angles, so as to achieve the effect of being able to analyze the optical angle information of the brightness of a single target to be measured at different measuring angles, and has the advantages of easy integration of the measuring device and accurate, correct and rapid measurement of the optical angle information of a single target to be measured. In addition, compared with the surface imaging, which is disturbed by the focal length and lens aberration of the lens and causes image distortion, the optical angle measuring device and the optical angle measuring method of the present invention can also obtain accurate, uniform and standard image information and its optical angle information through point scanning imaging. Furthermore, due to the characteristics of single-point scanning, the optical angle measuring device and the optical angle measuring method of the present invention will not be disturbed by other environments or other light-emitting elements (other targets to be measured), and can accurately analyze the optical angle information of a single target to be measured. At the same time, the image stitching correction method also greatly improves the reliability of the light type viewing angle measurement method of the present invention.

[0057] The present invention has been disclosed in the above with preferred embodiments, but those skilled in the art should understand that the embodiments are only used to describe the present invention and should not be interpreted as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to the embodiments should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be based on the scope defined by the patent application.

[0058] 10: Light type viewing angle measurement device 110: Base 120: Image Capture Module 130: Mobile module 140: Processing control module 200: Target to be tested 250: plane to be measured 300: Pixels 350: Select area S710~S730: Operation S810: Operation S820: Operation S822: Operation S824: Operation S826: Operation S830: Operation

Claims

1. A method for measuring optical viewing angle, suitable for execution by an optical viewing angle measuring device, the optical viewing angle measuring device including an image capturing module, the method being suitable for measuring image information of a target under test, the image information being associated with the optical viewing angle of the target under test, the method comprising: capturing first image data of the image information of the target under test at a first measuring angle; capturing second image data of the image information of the target under test at a second measuring angle; and obtaining optical viewing angle information of the target under test based on the first image data and the second image data; wherein... The image information is composed of a plurality of pixel information, wherein there are a plurality of targets to be measured, and the plurality of targets to be measured are arranged in a two-dimensional array on a plane to be measured; wherein the plurality of pixel information is obtained sequentially by a one-dimensional line scan, and wherein the first measurement angle and the second measurement angle are different angles.

2. The light pattern viewing angle measurement method as described in claim 1 further includes: The pixel information associated with the target under test is selected as the addressing operation for the image information.

3. The method for measuring the optical pattern angle as described in claim 1, wherein, The information for these multiple pixels is either light intensity information or spectral information.

4. The light pattern viewing angle measurement method as described in claim 1, further comprising: The optical response of the image capturing module is adjusted to match the response of human vision.

5. The method for measuring the optical pattern angle as described in claim 1, wherein, The image capturing module is a linear light sensor.

6. The method for measuring the optical pattern angle as described in claim 1, wherein, This light pattern view information is a one-view radar image.

7. The method for measuring the optical angle as described in claim 1, further comprising: Image correction operation to correct two-dimensional image errors in the image information.

8. The method for measuring the optical pattern angle as described in claim 7, wherein, The image correction operation involves performing two-dimensional image correction using a correction sample.

9. The method for measuring the optical pattern angle as described in claim 7, wherein, The image correction operation includes performing two-dimensional image correction based on features in the image information that are associated with the target under test.

10. A beam pattern angle measurement device, suitable for measuring image information of a target under test, the image information being associated with the beam pattern angle of the target under test, the beam pattern angle measurement device comprising: a base, suitable for supporting the target under test; an image capturing module, suitable for capturing the image information of the target under test; and a moving module, suitable for adjusting the relative position of the image capturing module and the base, wherein... The relative position includes a relative angle and a relative distance; and a processing control module electrically connected to the image capturing module and the motion module, the processing control module being adapted to perform the optical angle measurement method as described in any one of claims 1 to 9, wherein the image capturing module is adapted to capture the image information of the target under test at the same relative distance and at a plurality of different relative angles.

11. A beam angle measurement device, adapted to measure image information of a target under test, the image information being associated with the beam angle of the target under test, the beam angle measurement device comprising: a base adapted to support the target under test; a plurality of image capturing modules adapted to capture the image information of the target under test; and a processing control module electrically connected to the plurality of image capturing modules, the processing control module being adapted to perform the beam angle measurement method as described in any one of claims 1 to 9, wherein... The plurality of image capturing modules are adapted to capture the image information of the target under test at the same relative distance and at a plurality of different relative angles.

Images