A method and device for evaluating the ambient light shielding rate of a curtain

Abstract

The present application discloses a method and device for evaluating the ambient light shielding rate of a curtain, which comprises obtaining a first stereoscopic angle interval and a second stereoscopic angle interval of a light source irradiating the curtain; splitting the first stereoscopic angle interval and the second stereoscopic angle interval respectively to obtain a plurality of first stereoscopic angles and a plurality of second stereoscopic angles; determining a plurality of first ambient light shielding rates and a plurality of second ambient light shielding rates based on the plurality of first stereoscopic angles and the plurality of second stereoscopic angles; and evaluating the ambient light shielding rate of the curtain based on the plurality of first ambient light shielding rates and the plurality of second ambient light shielding rates to obtain an evaluation result. By obtaining the ambient light shielding rates corresponding to a plurality of directions, each ambient light shielding rate in each direction is obtained based on a plurality of stereoscopic angles, and different formulas are used to calculate the ambient light shielding rates in different directions, the calculated ambient light shielding rates are made more accurate, thereby improving the accuracy of the evaluation of the ambient light shielding rate of the curtain.

Description

Technical Field

[0001] The present application relates to the field of data processing technology, and in particular to a method and device for evaluating the ambient light shielding rate of a screen. Background Art

[0002] With the development of ultra-short-throw laser displays, the corresponding anti-glare screens based on Fresnel structures are also being gradually developed. Ambient light obscuration is an important indicator for evaluating the performance of anti-glare screens. It reflects the screen's ability to effectively improve image contrast and brightness under different ambient light conditions.

[0003] When evaluating ambient light obstruction (AOI), the center of the screen is typically illuminated by a light source, and the screen brightness under that illumination is measured. This brightness is then substituted into a formula to calculate the AOI. However, due to varying angles of incidence (for example, light striking the screen from different directions and heights), using the same formula to calculate AOI can lead to inaccurate or incomplete results, thus reducing the accuracy of the screen's AOI assessment.

[0004] Therefore, how to improve the accuracy of evaluating the ambient light shielding rate of a screen has become an urgent problem to be solved in this field. Summary of the Invention

[0005] The present application provides a method and device for evaluating the ambient light shielding rate of a screen, the purpose of which is to improve the accuracy of the evaluation of the ambient light shielding rate of the screen.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A method for evaluating the ambient light shielding rate of a curtain, comprising:

[0008] Obtain a first solid angle interval and a second solid angle interval of the light source irradiating the screen;

[0009] Splitting the first solid angle interval and the second solid angle interval respectively to obtain a plurality of first solid angles and a plurality of second solid angles; the plurality of first solid angles includes at least an initial first solid angle; the plurality of second solid angles includes at least an initial second solid angle;

[0010] determining a plurality of first ambient light shielding ratios according to the plurality of first solid angles and the initial second solid angle;

[0011] determining a plurality of second ambient light shielding ratios according to the initial first solid angle and the plurality of second solid angles;

[0012] The ambient light shielding rate of the curtain is evaluated according to the plurality of first ambient light shielding rates and the plurality of second ambient light shielding rates to obtain an evaluation result.

[0013] Optionally, determining a plurality of first ambient light shielding rates according to the plurality of first solid angles and the initial second solid angles includes:

[0014] Combining each of the first solid angles with the initial second solid angle to obtain a plurality of first angle combinations;

[0015] sequentially irradiating the light source to the center of the screen according to each of the first angle combinations;

[0016] measuring the illuminance of each first angle combination relative to the center position using an illuminometer, and measuring the brightness of each first angle combination relative to the center position using a luminance meter;

[0017] Calculating the product of the brightness of each first angle combination relative to the center position and π, and dividing the product by the illuminance of each first angle combination relative to the center position to obtain a target value;

[0018] The difference between 1 and the target value is calculated, and the product between the difference and 100% is calculated to obtain the first ambient light shielding rate corresponding to each first angle combination.

[0019] Optionally, determining a plurality of second ambient light shielding rates according to the initial first solid angle and the plurality of second solid angles includes:

[0020] Combining each of the second solid angles with the initial first solid angle to obtain a plurality of second angle combinations;

[0021] sequentially irradiating the light source to the center of the screen according to each of the second angle combinations;

[0022] measuring the illuminance of each second angle combination relative to the center position using an illuminometer, and measuring the brightness of each second angle combination relative to the center position using a luminance meter;

[0023] Calculating the product of the brightness of each second angle combination relative to the center position and π, and dividing the product by the illuminance of each second angle combination relative to the center position to obtain a parameter value;

[0024] The difference between 1 and the parameter value is calculated, and the product between the difference and 100% is calculated to obtain the second ambient light shielding rate corresponding to each second angle combination.

[0025] Optionally, evaluating the ambient light shielding rate of the curtain according to the plurality of first ambient light shielding rates and the plurality of second ambient light shielding rates to obtain an evaluation result includes:

[0026] Calculating an average value of all the first ambient light shielding rates to obtain a first average value;

[0027] Calculating an average of all the second ambient light shielding rates to obtain a second average value;

[0028] Adding the first average value and the second average value to obtain a total value of the ambient light shielding rate;

[0029] When the sum of the ambient light shielding rates is not less than the standard ambient light shielding rate, it is determined that the ambient light shielding rate of the screen meets the light blocking requirement.

[0030] When the total value of the ambient light shielding rates is less than the standard ambient light shielding rate, it is determined that the evaluation result is that the ambient light shielding rate of the screen does not meet the light blocking requirement.

[0031] Optionally, evaluating the ambient light shielding rate of the curtain according to the plurality of first ambient light shielding rates and the plurality of second ambient light shielding rates to obtain an evaluation result includes:

[0032] Obtaining ambient light intensities of all first stereo angle combinations and ambient light intensities of all second stereo angle combinations;

[0033] Adding the ambient light intensities of all the first solid angle combinations and the ambient light intensities of all the second solid angle combinations to obtain a total measurement value of the ambient light intensity;

[0034] For each of the ambient light intensities of the first solid angle combinations, calculating a ratio between the ambient light intensities of the first solid angle combinations and a total measured value of the ambient light intensities to obtain a first weight;

[0035] For each of the ambient light intensities of the second solid angle combination, calculating a ratio between the ambient light intensities of the second solid angle combination and the total measured value of the ambient light intensities to obtain a second weight;

[0036] determining a total value of ambient light shielding rates according to the ambient light intensities of a plurality of first solid angle combinations, the ambient light intensities of a plurality of second solid angle combinations, a plurality of first weights, and a plurality of second weights;

[0037] When the sum of the ambient light shielding rates is not less than the standard ambient light shielding rate, it is determined that the ambient light shielding rate of the screen meets the light blocking requirement.

[0038] When the total value of the ambient light shielding rates is less than the standard ambient light shielding rate, it is determined that the evaluation result is that the ambient light shielding rate of the screen does not meet the light blocking requirement.

[0039] Optionally, also include:

[0040] generating a relationship curve based on all the first solid angles and the first ambient light shielding rates corresponding to all the first solid angles; wherein the relationship curve includes at least a preset ambient light shielding rate;

[0041] The curve in which the first ambient light shielding rate is less than the preset ambient light shielding rate in the relationship curve is truncated to obtain a truncated relationship curve, and it is determined that the first ambient light shielding rate included in the truncated relationship curve meets the light blocking requirement.

[0042] A device for evaluating the ambient light shielding rate of a curtain, comprising:

[0043] An acquisition unit, configured to acquire a first solid angle interval and a second solid angle interval of the light source irradiating the screen;

[0044] a splitting unit, configured to split the first solid angle interval and the second solid angle interval respectively to obtain a plurality of first solid angles and a plurality of second solid angles; the plurality of first solid angles includes at least an initial first solid angle; the plurality of second solid angles includes at least an initial second solid angle;

[0045] a first determining unit, configured to determine a plurality of first ambient light shielding rates according to the plurality of first solid angles and the initial second solid angle;

[0046] a second determining unit, configured to determine a plurality of second ambient light shielding rates according to the initial first solid angle and the plurality of second solid angles;

[0047] An evaluation unit is configured to evaluate the ambient light shielding rate of the curtain according to the plurality of first ambient light shielding rates and the plurality of second ambient light shielding rates to obtain an evaluation result.

[0048] Optionally, the first determining unit is specifically configured to:

[0049] Combining each of the first solid angles with the initial second solid angle to obtain a plurality of first angle combinations;

[0050] sequentially irradiating the light source to the center of the screen according to each of the first angle combinations;

[0051] measuring the illuminance of each first angle combination relative to the center position using an illuminometer, and measuring the brightness of each first angle combination relative to the center position using a luminance meter;

[0052] Calculating the product of the brightness of each first angle combination relative to the center position and π, and dividing the product by the illuminance of each first angle combination relative to the center position to obtain a target value;

[0053] The difference between 1 and the target value is calculated, and the product between the difference and 100% is calculated to obtain the first ambient light shielding rate corresponding to each first angle combination.

[0054] Optionally, the second determining unit is specifically configured to:

[0055] Combining each of the second solid angles with the initial first solid angle to obtain a plurality of second angle combinations;

[0056] sequentially irradiating the light source to the center of the screen according to each of the second angle combinations;

[0057] measuring the illuminance of each second angle combination relative to the center position using an illuminometer, and measuring the brightness of each second angle combination relative to the center position using a luminance meter;

[0058] Calculating the product of the brightness of each second angle combination relative to the center position and π, and dividing the product by the illuminance of each second angle combination relative to the center position to obtain a parameter value;

[0059] The difference between 1 and the parameter value is calculated, and the product between the difference and 100% is calculated to obtain the second ambient light shielding rate corresponding to each second angle combination.

[0060] Optionally, the evaluation unit is specifically configured to:

[0061] Calculating an average value of all the first ambient light shielding rates to obtain a first average value;

[0062] Calculating an average of all the second ambient light shielding rates to obtain a second average value;

[0063] Adding the first average value and the second average value to obtain a total value of the ambient light shielding rate;

[0064] When the sum of the ambient light shielding rates is not less than the standard ambient light shielding rate, it is determined that the ambient light shielding rate of the screen meets the light blocking requirement.

[0065] When the total value of the ambient light shielding rates is less than the standard ambient light shielding rate, it is determined that the evaluation result is that the ambient light shielding rate of the screen does not meet the light blocking requirement.

[0066] The technical solution provided by the present application obtains a first stereoscopic angle interval and a second stereoscopic angle interval of the light source irradiating the screen; splits the first stereoscopic angle interval and the second stereoscopic angle interval respectively to obtain multiple first stereoscopic angles and multiple second stereoscopic angles; determines multiple first ambient light shielding rates based on the multiple first stereoscopic angles and the initial second stereoscopic angle; determines multiple second ambient light shielding rates based on the initial first stereoscopic angle and the multiple second stereoscopic angles; evaluates the ambient light shielding rate of the screen based on the multiple first ambient light shielding rates and the multiple second ambient light shielding rates to obtain an evaluation result. By obtaining the ambient light shielding rates corresponding to multiple directions, each ambient light shielding rate in each direction is obtained based on multiple stereoscopic angles, and different formulas are used to calculate the ambient light shielding rates in different directions, the calculated ambient light shielding rate is more accurate, thereby improving the accuracy of the evaluation of the ambient light shielding rate of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0068] Figure 1 A flowchart of a method for evaluating the ambient light shielding rate of a screen provided in an embodiment of the present application;

[0069] Figure 2 A flowchart of a method for determining a first ambient light shielding rate provided in an embodiment of the present application;

[0070] Figure 3 A flowchart of a method for determining a second ambient light shielding rate provided in an embodiment of the present application;

[0071] Figure 4 A schematic diagram of the architecture of a measurement device provided in an embodiment of the present application;

[0072] Figure 5 A flowchart of a method for evaluating ambient light shielding rate provided in an embodiment of the present application;

[0073] Figure 6 Another method for evaluating ambient light shielding rate provided in an embodiment of the present application;

[0074] Figure 7Another method for evaluating ambient light shielding rate provided in an embodiment of the present application;

[0075] Figure 8 A schematic diagram of a relationship curve provided in an embodiment of the present application;

[0076] Figure 9 A schematic diagram of the architecture of a device for evaluating the ambient light shielding rate of a screen provided in an embodiment of the present application. DETAILED DESCRIPTION

[0077] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0078] In this application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0079] like Figure 1 FIG. 1 is a flow chart of a method for evaluating the ambient light shielding rate of a curtain provided by the present application, comprising the following steps:

[0080] S101: Acquire a first solid angle interval and a second solid angle interval of a light source irradiating the screen.

[0081] The first solid angle interval indicates the angle interval in the θ direction, including but not limited to: (θ0,θ N ).

[0082] The second solid angle interval is indicated in The angle range of the direction includes but is not limited to:

[0083] It is understandable that the first solid angle interval and the second solid angle interval of the light source irradiating the screen are obtained so that the light source can be irradiated onto the screen according to the first solid angle interval and the second solid angle interval.

[0084] S102: Split the first stereo angle interval and the second stereo angle interval respectively to obtain a plurality of first stereo angles and a plurality of second stereo angles.

[0085] The plurality of first stereo angles include at least an initial first stereo angle; and the plurality of second stereo angles include at least an initial second stereo angle.

[0086] Optionally, the initial first solid angle and the initial second solid angle include but are not limited to: 90°.

[0087] It can be understood that the first stereo angle interval and the second stereo angle interval are divided respectively. Specifically, the first stereo angle interval and the second stereo angle interval are evenly divided respectively so that the intervals between adjacent stereo angles are the same.

[0088] Specifically, assuming that the first stereo angle interval and the second stereo angle interval are both (0°, 90°), the first stereo angle interval and the second stereo angle interval are split respectively to obtain multiple first stereo angles and multiple second stereo angles of 10°, 20°, 30°, 40°, 50°, 60°, 70° and 80°.

[0089] It can be seen that the interval between each adjacent solid angle is 10°.

[0090] It should be noted that the first stereo angle interval and the second stereo angle interval should be split as much as possible, that is, as many first stereo angles and second stereo angles as possible should be obtained. More stereo angles can usually reduce the deviation caused by sampling error or random variability, thereby being closer to the actual situation of the population.

[0091] S103: Determine a plurality of first ambient light shielding ratios according to the plurality of first solid angles and the initial second solid angle.

[0092] It is understood that, based on the multiple first stereo angles and the initial second stereo angle, multiple first ambient light obscuration rates are determined. Specifically, a light source is illuminated onto a screen based on the multiple first stereo angles and the initial second stereo angle; relevant information about the screen is obtained, and the first ambient light obscuration rates corresponding to the multiple first stereo angles are calculated based on the relevant information about the screen. The relevant information includes, but is not limited to, brightness and illumination.

[0093] Optionally, in another embodiment of the present application, the specific implementation of step S103 is as follows: Figure 2 As shown, the following steps are included:

[0094] S201: Combining each first solid angle with the initial second solid angle to obtain a plurality of first angle combinations.

[0095] It can be understood that since there are multiple first stereo angles, each first stereo angle is combined with the initial second stereo angle to obtain multiple first angle combinations, and the first stereo angle in each angle combination is different and the initial second stereo angle is the same.

[0096] Specifically, assuming there are three first stereo angles, namely 10°, 20° and 30°, and the initial second stereo angle is 90°, each first stereo angle is combined with the initial second stereo angle to obtain three first angle combinations: 10° and 90°, 20° and 90°, and 30° and 90°.

[0097] S202: irradiating the light source to the center of the screen according to each first angle combination in sequence.

[0098] The light source is irradiated to the center of the screen according to each first angle combination in sequence, that is, the light source is irradiated to the center of the screen according to the incident angle of each first angle combination in sequence.

[0099] Optionally, the light source includes but is not limited to: a parallel light source, a point light source, and the screen includes but is not limited to: an ultra-short-focus Fresnel screen, a long-focus Fresnel screen, and a black grid screen.

[0100] For example, there are three angle combinations, namely: the first angle combination, the second angle combination and the third angle combination. First, according to the first angle combination, the light source is irradiated to the center position of the screen; then according to the second angle combination, the light source is irradiated to the center position of the screen; finally, according to the third angle combination, the light source is irradiated to the center position of the screen.

[0101] S203: Using an illuminance meter to measure the illuminance of each first angle combination relative to the center position, and using a luminance meter to measure the luminance of each first angle combination relative to the center position.

[0102] The illuminance of each first angle combination relative to the center position is measured using an illuminance meter. That is, the light source is irradiated to the center position of the screen according to each angle combination, and the illuminance meter is used to measure the light intensity received at the center point of the screen corresponding to each angle combination.

[0103] It can be understood that the illuminance of each first angle combination relative to the center position is measured using a luminance meter, that is, the light source is irradiated to the center position of the screen according to each angle combination, and the luminance meter is used to measure the brightness of the center point of the screen illuminated by the light source of each angle combination.

[0104] It should be noted that the brightness when viewed vertically from the center of the screen is measured using a luminance meter.

[0105] S204: Calculate the product of the brightness of each first angle combination relative to the center position and π, and divide the product by the illuminance of each first angle combination relative to the center position to obtain a target value.

[0106] The specific expression of calculating the product of the brightness of each first angle combination relative to the center position and π and dividing the product by the illumination of each first angle combination relative to the center position is as shown in formula (1).

[0107]

[0108] In formula (1), brightness is the brightness of each first angle combination relative to the center position, and illuminance is the illuminance of the first angle combination relative to the center position.

[0109] S205: Calculate the difference between 1 and the target value, and calculate the product between the difference and 100% to obtain the first ambient light shielding rate corresponding to each first angle combination.

[0110] The specific form of calculating the difference between 1 and the target value and the product of the difference and 100% is shown in formula (2).

[0111] First ambient light shielding rate = (1-target value) * 100% (2)

[0112] S104: Determine a plurality of second ambient light shielding ratios according to the initial first solid angle and the plurality of second solid angles.

[0113] It can be understood that multiple second ambient light shielding rates are determined based on the initial first stereo angle and multiple second stereo angles. Specifically, the light source is irradiated on the screen based on the initial first stereo angle and multiple second stereo angles; relevant information of the screen is obtained, and the second ambient light shielding rates corresponding to the multiple second stereo angles are calculated based on the relevant information of the screen.

[0114] Optionally, in another embodiment of the present application, the specific implementation of step S104 is as follows: Figure 3 As shown, the following steps are included:

[0115] S301: Combining each second solid angle with the initial first solid angle to obtain a plurality of second angle combinations.

[0116] It should be noted that the specific implementation of step S301 can refer to step S201 accordingly, and will not be repeated here.

[0117] S302: sequentially irradiating the light source to the center of the screen according to each second angle combination.

[0118] It should be noted that the specific implementation of step S302 can refer to step S202 accordingly, and will not be repeated here.

[0119] S303: Using an illuminance meter to measure the illuminance of each second angle combination relative to the center position, and using a luminance meter to measure the luminance of each second angle combination relative to the center position.

[0120] It should be noted that the specific implementation of step S303 may refer to step S203 accordingly, and will not be repeated here.

[0121] S304: Calculate the product of the brightness of each second angle combination relative to the center position and π, and divide the product by the illuminance of each second angle combination relative to the center position to obtain a parameter value.

[0122] The specific expression of calculating the product of the brightness of each second angle combination relative to the center position and π and dividing the product by the illuminance of each second angle combination relative to the center position is as shown in formula (3).

[0123]

[0124] In formula (3), brightness is the brightness of each second angle combination relative to the center position, and illuminance is the illuminance of the second angle combination relative to the center position.

[0125] S305: Calculate the difference between 1 and the parameter value, and calculate the product between the difference and 100% to obtain the second ambient light shielding rate corresponding to each second angle combination.

[0126] The specific form of calculating the difference between 1 and the target value and the product of the difference and 100% is shown in formula (4).

[0127] Second ambient light shielding rate = (1-parameter value) * 100% (4)

[0128] For a better Figure 2 and Figure 3 For an explanation of the contents shown, see Figure 4A schematic diagram of the architecture of a measuring device is shown, including a screen 1, a light source 2 (e.g., a parallel light source, using a white light source collimated by a collimator, with a collimator focal length of 1000 to 2000 mm, an objective lens relative aperture of not less than 1 / 15, and a wavefront aberration of less than 1 / 4 wavelength), an illuminometer 3 (disposed at the center of the screen), and a luminance meter 4 (with a field of view perpendicular to the screen). The light source is directed to the center of the screen according to each first angle combination and each second angle combination, and then the illuminance at the center of the screen is measured using the illuminometer, and the luminance when viewed perpendicularly from the center of the screen is measured using the luminance meter. A first ambient light shielding ratio and a second ambient light shielding ratio are calculated based on the luminance and illuminance.

[0129] S105: Evaluate the ambient light shielding rate of the screen according to the multiple first ambient light shielding rates and the multiple second ambient light shielding rates to obtain an evaluation result.

[0130] Among them, the evaluation results are: the ambient light shielding rate of the screen meets the light blocking requirements, and the ambient light shielding rate of the screen does not meet the light blocking requirements.

[0131] It can be understood that the ambient light shielding rate of the screen is evaluated based on multiple first ambient light shielding rates and multiple second ambient light shielding rates. Specifically, the average value of all first ambient light shielding rates is calculated, and the average value of all second ambient light shielding rates is calculated; the ambient light shielding rate of the screen is evaluated based on the average value of the first ambient light shielding rates and the average value of the second ambient light shielding rates to obtain an evaluation result.

[0132] Optionally, in another embodiment of the present application, the specific implementation of step S105 is as follows: Figure 5 As shown, the following steps are included:

[0133] S501: Calculate an average value of all first ambient light shielding rates to obtain a first average value.

[0134] The average value of all first ambient light shielding rates is calculated. Specifically, the sum of all first ambient light shielding rates is calculated first, and the sum is divided by the number of first ambient light shielding rates to obtain the first average value.

[0135] Optionally, all first ambient light shielding rates are weighted, but since the weights are the same (for example, all are 1 / N), weighting is to calculate the average value of all first ambient light shielding rates. Therefore, the average value of all first ambient light shielding rates is calculated here to obtain the first average value.

[0136] It should be noted that the specific form of calculating the average value of all first ambient light shielding rates is shown in formula (5).

[0137]

[0138] In formula (5), β(θ i ) is each first ambient light shielding rate, N is the number of first ambient light shielding rates, β θ is the first average value.

[0139] It should be emphasized that for the normalization of the ambient light angular distribution coefficient, a weighted average is usually used to evaluate the ambient light shielding ability of the screen under test, especially when the ambient light intensity does not change with angle.

[0140] S502: Calculate an average value of all second ambient light shielding rates to obtain a second average value.

[0141] It can be understood that, since the weights of the second ambient light shielding rates are the same (all 1 / M), all the second ambient light shielding rates are weighted, that is, the average value of all the second ambient light shielding rates is calculated to obtain the second average value.

[0142] The specific form of calculating the average value of all second ambient light shielding rates is shown in formula (6).

[0143]

[0144] In formula (6), is each second ambient light shielding rate, M is the number of second ambient light shielding rates, is the second average value.

[0145] S503: Add the first average value and the second average value to obtain a total value of the ambient light shielding rate.

[0146] The specific form of adding the first average value and the second average value is shown in formula (7).

[0147]

[0148] In formula (7), β is the sum of the ambient light shielding rates.

[0149] S504: When the total value of the ambient light shielding rate is not less than the standard ambient light shielding rate, it is determined that the evaluation result is that the ambient light shielding rate of the screen meets the light blocking requirement.

[0150] Optionally, the specific expression of the standard ambient light occlusion rate includes but is not limited to: β s .

[0151] It can be understood that when the total value of the ambient light shielding rate is not less than the standard ambient light shielding rate, the evaluation result is determined to be that the ambient light shielding rate of the screen meets the light blocking requirements, that is, the screen has a strong ability to shield ambient light.

[0152] S505: When the total value of the ambient light shielding rate is less than the standard ambient light shielding rate, it is determined that the evaluation result is that the ambient light shielding rate of the screen does not meet the light blocking requirement.

[0153] It can be understood that when the total value of the ambient light shielding rate is less than the standard ambient light shielding rate, the evaluation result is determined to be that the ambient light shielding rate of the screen does not meet the light blocking requirements, that is, the screen's ability to shield ambient light is poor.

[0154] Optionally, in another embodiment of the present application, the specific implementation of step S105 is as follows: Figure 6 As shown, the following steps are included:

[0155] S601: Obtaining ambient light intensities of all first stereo angle combinations and ambient light intensities of all second stereo angle combinations.

[0156] Optionally, ambient light intensity refers to the natural light intensity level in a specific environment. It describes the light intensity generated by natural light (such as sunlight, indoor lights, etc.) in a certain space or location.

[0157] It is understandable that the ambient light intensities of all first stereo angle combinations and the ambient light intensities of all second stereo angle combinations are obtained so that the ambient light shielding rate of the curtain can be subsequently evaluated based on the ambient light intensity of each first stereo angle combination and the ambient light intensity of each second stereo angle combination.

[0158] S602: Add the ambient light intensities of all first solid angle combinations and the ambient light intensities of all second solid angle combinations to obtain a total measured value of the ambient light intensity.

[0159] The specific form of adding the ambient light intensities of all first solid angle combinations and the ambient light intensities of all second solid angle combinations is: Among them, I(θ i ) is the first solid angle combination (θ i ,90°) of ambient light intensity, The second solid angle combination The ambient light intensity.

[0160] S603: For each ambient light intensity of the first stereo angle combination, calculate a ratio between the ambient light intensity of the first stereo angle combination and the total measured value of the ambient light intensity to obtain a first weight.

[0161] The ratio between the ambient light intensity of the first solid angle combination and the total measured value of the ambient light intensity is calculated to obtain a specific expression of the first weight, as shown in formula (8).

[0162]

[0163] In formula (8), ω(θ i ) is the first weight.

[0164] S604: For each ambient light intensity of the second solid angle combination, calculate a ratio between the ambient light intensity of the second solid angle combination and the total measured value of the ambient light intensity to obtain a second weight.

[0165] The ratio between the ambient light intensity of the second solid angle combination and the total measured value of the ambient light intensity is calculated to obtain a specific expression of the second weight, as shown in formula (9).

[0166]

[0167] In formula (9), is the second weight.

[0168] S605: Determine a total value of the ambient light shielding rate according to the ambient light intensities of the plurality of first solid angle combinations, the ambient light intensities of the plurality of second solid angle combinations, the plurality of first weights, and the plurality of second weights.

[0169] It can be understood that the specific implementation process of determining the sum of the ambient light shielding ratios based on the ambient light intensities of the multiple first stereo angle combinations, the ambient light intensities of the multiple second stereo angle combinations, the multiple first weights, and the multiple second weights is as follows: substituting the ambient light intensities of the multiple first stereo angle combinations, the ambient light intensities of the multiple second stereo angle combinations, the multiple first weights, and the multiple second weights into the ambient light shielding ratio formula to calculate the sum of the ambient light shielding ratios. The specific expression of the ambient light shielding ratio formula is shown in Formula (10).

[0170]

[0171] S606: When the total value of the ambient light shielding rate is not less than the standard ambient light shielding rate, it is determined that the evaluation result is that the ambient light shielding rate of the screen meets the light blocking requirement.

[0172] It should be noted that the specific implementation of step S606 may refer to step S504 accordingly, and will not be repeated here.

[0173] S607: When the total value of the ambient light shielding rate is less than the standard ambient light shielding rate, it is determined that the evaluation result is that the ambient light shielding rate of the screen does not meet the light blocking requirement.

[0174] It should be noted that the specific implementation of step S607 may refer to step S505 accordingly, and will not be repeated here.

[0175] Optionally, the ambient light shielding rate of the screen evaluated by different methods may be the same or different. By using multiple methods, we can fully understand the performance of the screen in actual use scenarios. Therefore, another method for evaluating the ambient light shielding rate is provided in another embodiment of the present application, such as Figure 7 As shown, the following steps are included:

[0176] S701: Generate a relationship curve based on all first solid angles and first ambient light shielding rates corresponding to all first solid angles.

[0177] The relationship curve at least includes a preset ambient light shielding rate (eg β0).

[0178] Optionally, the specific form of the relationship curve, such as Figure 8 As shown, the figure includes the corresponding relationships between all first solid angles and first ambient light shielding rates.

[0179] S702: Truncating the curve in the relationship curve where the first ambient light shielding rate is less than the preset ambient light shielding rate to obtain a truncated relationship curve, and determining that the first ambient light shielding rate included in the truncated relationship curve meets the light blocking requirement.

[0180] It can be understood that since the ambient light shielding rate is large, it means that the screen has a strong ability to shield ambient light. Therefore, the curve in the relationship curve where the first ambient light shielding rate is less than the preset ambient light shielding rate is truncated, and the ambient light shielding rates in the truncated relationship curve all mean that the screen has a strong ability to shield ambient light.

[0181] In summary, by obtaining the ambient light obscuration rates corresponding to multiple directions, each ambient light obscuration rate in each direction is obtained according to multiple stereo angles, and different formulas are used to calculate the ambient light obscuration rates in different directions, so that the calculated ambient light obscuration rates are more accurate, thereby improving the accuracy of the evaluation of the ambient light obscuration rate of the curtain.

[0182] like Figure 9 , which is a schematic diagram of the architecture of a device for evaluating the ambient light shielding rate of a curtain provided in the present application, the evaluation device includes: an acquisition unit 100 , a splitting unit 200 , a first determination unit 300 , a second determination unit 400 and an evaluation unit 500 .

[0183] The acquisition unit 100 is configured to acquire a first solid angle interval and a second solid angle interval of a light source irradiating the screen.

[0184] The splitting unit 200 is used to split the first stereo angle interval and the second stereo angle interval respectively to obtain multiple first stereo angles and multiple second stereo angles; the multiple first stereo angles include at least the initial first stereo angle; the multiple second stereo angles include at least the initial second stereo angle.

[0185] The first determining unit 300 is configured to determine a plurality of first ambient light shielding rates according to the plurality of first solid angles and the initial second solid angle.

[0186] The first determination unit 300 is specifically used to: combine each first stereo angle with the initial second stereo angle to obtain multiple first angle combinations; illuminate the light source to the center position of the screen according to each first angle combination in turn; use a illuminance meter to measure the illuminance of each first angle combination relative to the center position, and use a luminance meter to measure the brightness of each first angle combination relative to the center position; calculate the product of the brightness of each first angle combination relative to the center position and π, and divide the product by the illuminance of each first angle combination relative to the center position to obtain a target value; calculate the difference between 1 and the target value, and calculate the product between the difference and 100% to obtain the first ambient light shielding rate corresponding to each first angle combination.

[0187] The second determining unit 400 is configured to determine a plurality of second ambient light shielding rates according to the initial first solid angle and the plurality of second solid angles.

[0188] The second determination unit 400 is specifically used to: combine each second stereo angle with the initial first stereo angle to obtain multiple second angle combinations; illuminate the light source to the center position of the screen according to each second angle combination in turn; use a illuminance meter to measure the illuminance of each second angle combination relative to the center position, and use a luminance meter to measure the brightness of each second angle combination relative to the center position; calculate the product of the brightness of each second angle combination relative to the center position and π, and divide the product by the illuminance of each second angle combination relative to the center position to obtain a parameter value; calculate the difference between 1 and the parameter value, and calculate the product between the difference and 100% to obtain the second ambient light shielding rate corresponding to each second angle combination.

[0189] The evaluation unit 500 is configured to evaluate the ambient light shielding rate of the screen according to the plurality of first ambient light shielding rates and the plurality of second ambient light shielding rates to obtain an evaluation result.

[0190] The evaluation unit 500 is specifically used to: calculate the average value of all first ambient light shielding rates to obtain a first average value; calculate the average value of all second ambient light shielding rates to obtain a second average value; add the first average value and the second average value to obtain a total value of the ambient light shielding rates; when the total value of the ambient light shielding rates is not less than the standard ambient light shielding rate, determine that the evaluation result is that the ambient light shielding rate of the screen meets the light blocking requirements; when the total value of the ambient light shielding rates is less than the standard ambient light shielding rate, determine that the evaluation result is that the ambient light shielding rate of the screen does not meet the light blocking requirements.

[0191] The evaluation unit 500 is specifically used to: obtain the ambient light intensity of all first stereo angle combinations and the ambient light intensity of all second stereo angle combinations; add the ambient light intensities of all first stereo angle combinations and the ambient light intensities of all second stereo angle combinations to obtain a total measurement value of the ambient light intensity; for the ambient light intensity of each first stereo angle combination, calculate the ratio between the ambient light intensity of the first stereo angle combination and the total measurement value of the ambient light intensity to obtain a first weight; for the ambient light intensity of each second stereo angle combination, calculate the ratio between the ambient light intensity of the second stereo angle combination and the total measurement value of the ambient light intensity to obtain a second weight; determine the total value of the ambient light shielding rate based on the ambient light intensities of multiple first stereo angle combinations, the ambient light intensities of multiple second stereo angle combinations, the multiple first weights and the multiple second weights; when the total value of the ambient light shielding rate is not less than the standard ambient light shielding rate, determine that the evaluation result is that the ambient light shielding rate of the curtain meets the light blocking requirement; when the total value of the ambient light shielding rate is less than the standard ambient light shielding rate, determine that the evaluation result is that the ambient light shielding rate of the curtain does not meet the light blocking requirement.

[0192] In summary, by obtaining the ambient light obscuration rates corresponding to multiple directions, each ambient light obscuration rate in each direction is obtained according to multiple stereo angles, and different formulas are used to calculate the ambient light obscuration rates in different directions, so that the calculated ambient light obscuration rates are more accurate, thereby improving the accuracy of the evaluation of the ambient light obscuration rate of the curtain.

[0193] Preferably, combined Figure 9 The content shown in FIG. 4 shows, the evaluation device further includes: a generating unit and a truncation unit.

[0194] A generating unit, configured to generate a relationship curve based on all first solid angles and first ambient light shielding rates corresponding to all first solid angles; the relationship curve at least includes a preset ambient light shielding rate;

[0195] The truncation unit is used to truncate the curve in which the first ambient light shielding rate in the relationship curve is less than the preset ambient light shielding rate to obtain a truncated relationship curve, and determine whether the first ambient light shielding rate included in the truncated relationship curve meets the light blocking requirement.

[0196] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Ordinary technicians in this field can understand and implement it without expending creative work.

[0197] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0198] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for evaluating the ambient light shielding rate of a curtain, characterized in that: include: Obtain a first solid angle interval and a second solid angle interval of the light source irradiating the screen; Splitting the first solid angle interval and the second solid angle interval respectively to obtain a plurality of first solid angles and a plurality of second solid angles; the plurality of first solid angles includes at least an initial first solid angle; the plurality of second solid angles includes at least an initial second solid angle; determining a plurality of first ambient light shielding ratios according to the plurality of first solid angles and the initial second solid angle; determining a plurality of second ambient light shielding ratios according to the initial first solid angle and the plurality of second solid angles; evaluating the ambient light shielding rate of the screen according to the plurality of first ambient light shielding rates and the plurality of second ambient light shielding rates to obtain an evaluation result; The step of evaluating the ambient light shielding rate of the curtain according to the plurality of first ambient light shielding rates and the plurality of second ambient light shielding rates to obtain an evaluation result includes: Calculating an average value of all the first ambient light shielding rates to obtain a first average value; Calculating an average of all the second ambient light shielding rates to obtain a second average value; Adding the first average value and the second average value to obtain a total value of the ambient light shielding rate; When the sum of the ambient light shielding rates is not less than the standard ambient light shielding rate, it is determined that the ambient light shielding rate of the screen meets the light blocking requirement. When the total value of the ambient light shielding rates is less than the standard ambient light shielding rate, it is determined that the evaluation result is that the ambient light shielding rate of the screen does not meet the light blocking requirement.

2. The method according to claim 1, characterized in that The determining of a plurality of first ambient light shielding rates according to the plurality of first solid angles and the initial second solid angle comprises: Combining each of the first solid angles with the initial second solid angle to obtain a plurality of first angle combinations; sequentially irradiating the light source to the center of the screen according to each of the first angle combinations; measuring the illuminance of each first angle combination relative to the center position using an illuminometer, and measuring the brightness of each first angle combination relative to the center position using a luminance meter; Calculating the product of the brightness of each first angle combination relative to the center position and π, and dividing the product by the illuminance of each first angle combination relative to the center position to obtain a target value; The difference between 1 and the target value is calculated, and the product between the difference and 100% is calculated to obtain the first ambient light shielding rate corresponding to each first angle combination.

3. The method according to claim 1, characterized in that The determining of a plurality of second ambient light shielding rates according to the initial first solid angle and the plurality of second solid angles includes: Combining each of the second solid angles with the initial first solid angle to obtain a plurality of second angle combinations; sequentially irradiating the light source to the center of the screen according to each of the second angle combinations; measuring the illuminance of each second angle combination relative to the center position using an illuminometer, and measuring the brightness of each second angle combination relative to the center position using a luminance meter; Calculating the product of the brightness of each second angle combination relative to the center position and π, and dividing the product by the illuminance of each second angle combination relative to the center position to obtain a parameter value; The difference between 1 and the parameter value is calculated, and the product between the difference and 100% is calculated to obtain the second ambient light shielding rate corresponding to each second angle combination.

4. The method according to claim 2 or 3, characterized in that The step of evaluating the ambient light shielding rate of the curtain according to the plurality of first ambient light shielding rates and the plurality of second ambient light shielding rates to obtain an evaluation result includes: Obtaining ambient light intensities of all first stereo angle combinations and ambient light intensities of all second stereo angle combinations; Adding the ambient light intensities of all the first solid angle combinations and the ambient light intensities of all the second solid angle combinations to obtain a total measurement value of the ambient light intensity; For each of the ambient light intensities of the first solid angle combinations, calculating a ratio between the ambient light intensities of the first solid angle combinations and a total measured value of the ambient light intensities to obtain a first weight; For each of the ambient light intensities of the second solid angle combination, calculating a ratio between the ambient light intensities of the second solid angle combination and the total measured value of the ambient light intensities to obtain a second weight; determining a total value of ambient light shielding rates according to the ambient light intensities of a plurality of first solid angle combinations, the ambient light intensities of a plurality of second solid angle combinations, a plurality of first weights, and a plurality of second weights; When the sum of the ambient light shielding rates is not less than the standard ambient light shielding rate, it is determined that the ambient light shielding rate of the screen meets the light blocking requirement. When the total value of the ambient light shielding rates is less than the standard ambient light shielding rate, it is determined that the evaluation result is that the ambient light shielding rate of the screen does not meet the light blocking requirement.

5. The method according to claim 1, wherein Also includes: generating a relationship curve based on all the first solid angles and first ambient light occlusion rates corresponding to all the first solid angles; The relationship curve at least includes a preset ambient light shielding rate; The curve in which the first ambient light shielding rate is less than the preset ambient light shielding rate in the relationship curve is truncated to obtain a truncated relationship curve, and it is determined that the first ambient light shielding rate included in the truncated relationship curve meets the light blocking requirement.

6. A device for evaluating the ambient light shielding rate of a curtain, characterized in that: include: An acquisition unit, configured to acquire a first solid angle interval and a second solid angle interval of the light source irradiating the screen; a splitting unit, configured to split the first solid angle interval and the second solid angle interval respectively to obtain a plurality of first solid angles and a plurality of second solid angles; the plurality of first solid angles includes at least an initial first solid angle; the plurality of second solid angles includes at least an initial second solid angle; a first determining unit, configured to determine a plurality of first ambient light shielding rates according to the plurality of first solid angles and the initial second solid angle; a second determining unit, configured to determine a plurality of second ambient light shielding rates according to the initial first solid angle and the plurality of second solid angles; an evaluation unit, configured to evaluate the ambient light shielding rate of the screen according to the plurality of first ambient light shielding rates and the plurality of second ambient light shielding rates, and obtain an evaluation result; The evaluation unit is specifically used for: Calculating an average value of all the first ambient light shielding rates to obtain a first average value; Calculating an average of all the second ambient light shielding rates to obtain a second average value; Adding the first average value and the second average value to obtain a total value of the ambient light shielding rate; When the sum of the ambient light shielding rates is not less than the standard ambient light shielding rate, it is determined that the ambient light shielding rate of the screen meets the light blocking requirement. When the total value of the ambient light shielding rates is less than the standard ambient light shielding rate, it is determined that the evaluation result is that the ambient light shielding rate of the screen does not meet the light blocking requirement.

7. The device according to claim 6, characterized in that The first determining unit is specifically configured to: Combining each of the first solid angles with the initial second solid angle to obtain a plurality of first angle combinations; sequentially irradiating the light source to the center of the screen according to each of the first angle combinations; measuring the illuminance of each first angle combination relative to the center position using an illuminometer, and measuring the brightness of each first angle combination relative to the center position using a luminance meter; Calculating the product of the brightness of each first angle combination relative to the center position and π, and dividing the product by the illuminance of each first angle combination relative to the center position to obtain a target value; The difference between 1 and the target value is calculated, and the product between the difference and 100% is calculated to obtain the first ambient light shielding rate corresponding to each first angle combination.

8. The device according to claim 6, characterized in that The second determining unit is specifically configured to: Combining each of the second solid angles with the initial first solid angle to obtain a plurality of second angle combinations; sequentially irradiating the light source to the center of the screen according to each of the second angle combinations; measuring the illuminance of each second angle combination relative to the center position using an illuminometer, and measuring the brightness of each second angle combination relative to the center position using a luminance meter; Calculating the product of the brightness of each second angle combination relative to the center position and π, and dividing the product by the illuminance of each second angle combination relative to the center position to obtain a parameter value; The difference between 1 and the parameter value is calculated, and the product between the difference and 100% is calculated to obtain the second ambient light shielding rate corresponding to each second angle combination.

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