Clarity test card and test method for eye-protection table lamp

Abstract

The invention relates to the technical field of lamps, in particular to a definition test card and a test method for an eye-protecting table lamp, and the definition test card for the eye-protecting table lamp is characterized by comprising a single-light-source definition test card and a multi-light-source definition test card with limited specifications, a high-transmittance PE (polyethylene) material is selected as a light-transmitting surface material, and a high-transmittance PE material is selected as a light-transmitting surface material; compared with the prior art, the definition test card of the eye-protection table lamp and the test method of the definition test card have the advantages that corresponding standards are formulated for a detection device of the eye-protection table lamp, and the detection device is provided with the test patterns which change regularly, and the test patterns show changes of integrity and definition under the influence of illumination; the method is used for checking whether the eye-protecting table lamp meets eye-protecting requirements.

Description

Technical Field

[0001] The invention relates to the technical field of desk lamps, and more particularly to a clarity test card and a test method for an eye-protection desk lamp. Background Art

[0002] There are many types of desk lamps on the market, and there are great differences. Among them, the design for eye health is crucial. The illuminance and uniformity of desk lamps not only affect the lighting quality, but also are related to human eye fatigue during reading. Too low or uneven illuminance will affect visual clarity and comfort, while too high or too low clarity desk lamp light may cause eye fatigue.

[0003] At present, there are no national standards for the clarity of desk lamps, and the existing clarity test methods are mainly for display screens, cameras and visible light. There is a lack of a standardized clarity test method in the field of eye adjustment training desk lamps. The existing desk lamp market usually provides a clarity test card to evaluate clarity based on the smallest visually recognizable light and shadow pattern, but this is usually not designed specifically for eye adjustment training desk lamps. Different test card patterns, inconsistent placement heights, and test environment variables will all lead to inaccurate clarity evaluations. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a clarity test card and a test method for an eye protection desk lamp.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions: a clarity test card for an eye protection desk lamp, characterized in that it includes a single light source clarity test card and a multi-light source clarity test card; The size of the single light source clarity test card is 210mm*140mm, and the penumbra threshold interval is set to 0.1mm to 0.5mm; The size of the multi-light source clarity test card is 220mm*326mm, and the penumbra threshold interval is set to 0.5mm to 20mm; The edge bleed size of the single light source clarity test card and the multi-light source clarity test card are both 13mm*13mm.

[0006] In one of the embodiments, the light-transmitting surface material of the single-light-source clarity test card and the multi-light-source clarity test card is selected to be a high-transmittance PE material.

[0007] In one of the embodiments, the single-light source clarity test card and the multi-light source clarity test card are both provided with test patterns, and the test patterns are graphics arranged in a continuous pattern.

[0008] In one embodiment, the graphic is in the form of lines or dots.

[0009] In one of the embodiments, in the single-light source clarity test card, the penumbra threshold of the widest line is the same as the maximum value of the penumbra threshold interval of the single-light source clarity test card, and the penumbra threshold of the narrowest line is the same as the minimum value of the penumbra threshold interval of the single-light source clarity test card.

[0010] In one of the embodiments, in the multi-light source clarity test chart, the penumbra threshold of the widest line is the same as the maximum value of the penumbra threshold interval of the multi-light source clarity test chart, and the penumbra threshold of the narrowest line is the same as the minimum value of the penumbra threshold interval of the multi-light source clarity test chart.

[0011] In one of the embodiments, in the test pattern, the line width decreases sequentially in the horizontal direction.

[0012] The test method of the clarity test card comprises the following steps: S1. Use a clarity test card and place it directly below the light-emitting surface of the desk lamp, and limit the distance from the light-emitting surface to 30mm or 20mm; S2, the clarity test card is illuminated by the light-emitting surface of the desk lamp, and a plurality of test patterns are presented, wherein the test patterns have scale values, and the integrity and clarity of the test patterns are affected by the illumination of the light-emitting surface of the desk lamp; S3, observing the clarity test card with the naked eye, finding the test pattern with the smallest integrity and clarity among the test patterns that can be seen clearly by the naked eye, and recording the scale value at the test pattern; S4. Determine whether the image is presented clearly.

[0013] The clarity test card and test method of the eye protection desk lamp described above have the following beneficial effects: First, in terms of standardized clarity testing, the present invention provides a standardized clarity testing method, which is specially designed for eye adjustment training lamps and is more professional in judging eye protection standards. This standardized method can ensure that desk lamps of different brands and models can undergo the same test to conduct comparable clarity evaluations. The testing method is simple, the preparation conditions are easy, and the observation comparison is obvious. Second, in terms of observation height, the test card of the present invention and the settings of 30mm and 20mm observation heights are designed for eye protection desk lamps, simulating the observation conditions of users when actually using desk lamps, ensuring the authenticity of the test. Users testing under such observation conditions is helpful to evaluate the performance of eye protection desk lamps in actual use; Thirdly, in terms of the clarity threshold standard, by adopting test patterns and single-light source clarity test cards, penumbra threshold settings, etc., the testing method of the present invention can provide accurate clarity evaluation. When the user is at the observation height of the present invention and the light from the desk lamp provides sufficient clarity, they can just see the smallest lines and then judge the eye protection function of the eye protection desk lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the structure of a single light source clarity test card in this embodiment; Figure 2 is a schematic diagram of the structure of the multi-light source clarity test card in this embodiment; Figure 3 Schematic diagram of the penumbra range of the single light source clarity test card pattern in this embodiment; Figure 4 Schematic diagram of the penumbra range of the multi-light source clarity test card pattern in this embodiment. DETAILED DESCRIPTION

[0015] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0017] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, unless otherwise clearly and specifically defined.

[0018] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0020] A clarity test card for an eye protection desk lamp, such as Figure 1 and Figure 2 As shown, there are single light source clarity test cards and multi-light source clarity test cards; like Figure 1 As shown, the size of the single light source clarity test chart is 210mm*140mm, and the penumbra threshold range is set to 0.1mm to 0.5mm; like Figure 2 As shown, the size of the multi-light source clarity test chart is 220mm*326mm, and the penumbra threshold range is set to 0.5mm to 20mm; like Figure 1 and Figure 2 As shown, the edge bleed size of the single light source clarity test card and the multi-light source clarity test card are both 13mm*13mm; According to the above design, in one embodiment, the size is set to 210mm*140mm or 220mm*326mm, which has a good visual effect and is of suitable size, making it convenient to design and layout the test pattern on the clarity test card; Considering that people's vision is different and there are single light sources and multiple light sources, in the case of single light source, a penumbra threshold interval of 0.1mm to 0.5mm is set, and in the case of multiple light sources, a penumbra threshold interval of 0.5mm to 20mm is set. These two different penumbra threshold intervals can make a judgment on the clarity when illuminated by different light sources; The edge bleed size of the single light source clarity test chart and the multi-light source clarity test chart is set to 13mm*13mm, which makes the bleed size relatively large, which is conducive to providing more fault tolerance in the clarity test chart manufacturing process; In other embodiments, the single-light source clarity test card and the multi-light source clarity test card may be of other proportional sizes and other proportional edge bleed sizes, that is, as long as they can meet the requirements of production and use.

[0021] Specifically, the light-transmitting surface material of the single-light-source clarity test card and the multi-light-source clarity test card is selected to be a high-transmittance PE material.

[0022] Through the above design, in one embodiment, the benefit is that the high-transmittance PE material can allow the light of the eye-protection desk lamp to normally enter the translucent surface of the single-light source clarity test card and the multi-light source clarity test card, thereby causing the test pattern to produce a penumbra, and then the corresponding penumbra threshold is used to judge whether the eye-protection desk lamp can clearly present the image.

[0023] Specifically, Figure 1-4 As shown, both the single light source clarity test card and the multi-light source clarity test card are provided with test patterns, and the test patterns are graphics arranged in a continuous manner.

[0024] The test pattern is a continuously arranged pattern, and the changes in the pattern can be visually perceived. When the human eye observes the test pattern, if the clarity and integrity of the pattern change, the naked eye can clearly perceive it and lock the test pattern with different changes, and then judge the clarity status when the current light source is irradiated; The test pattern can also be set to a variety of graphics, such as circles, rectangles, and other graphics that can be helpful as test patterns; like Figure 3 As shown in the figure, when the light source is a single light source and a single light source clarity test card is used, the test pattern on the card is affected by the size of the light source's luminous surface. The two extreme ends of the luminous surface will respectively project onto the edge of the pattern, resulting in a double image. Among them, the a / b and c / d lines respectively represent the penumbra shadow range D1 produced by the light from the two extreme points of the luminous surface irradiating the same point on the test card; the c and b lines represent the total penumbra range D2 after a single light source irradiates a scale. like Figure 4 As shown in the figure, when the light source is multiple light sources and a multiple light source clarity test card is used, the light with different spacings on the light source surface will project onto the edge of the pattern due to the influence of the light source light surface size, the number of light sources and the distance between light sources, resulting in double images; the penumbra shadow range produced by the same point is D1; ​​the k and b lines represent the total penumbra shadow range D2 after multiple light sources illuminate a scale; also, Figure 3-4This is just a simulation demonstration. In specific situations, the light source irradiation position and light source shape can be various, but the single light source clarity test card and multi-light source clarity test card are still applicable.

[0025] Specifically, Figure 1 As shown, the graphics are lines or dots. When the graphics are lines or dots, under the illumination of light, compared with blurred gradients or other unclear representations, lines or dots can clearly show the range and shape of the penumbra and accurately convey the characteristics of the penumbra. Therefore, when observing the lines with the naked eye, the lines that can be clearly observed and the lines that cannot be clearly observed can be used as the judgment standard of clarity.

[0026] Specifically, in the single light source clarity test card, the penumbra threshold of the widest line is the same as the maximum value of the penumbra threshold interval of the single light source clarity test card, and the penumbra threshold of the narrowest line is the same as the minimum value of the penumbra threshold interval of the single light source clarity test card.

[0027] Through the above design, in one embodiment, the benefit is that the penumbra threshold interval of the single light source clarity test card limits the penumbra threshold range of the line, so that when the integrity and clarity of the line are observed under the illumination of the light source, it does not exceed the penumbra threshold interval range of the single light source clarity test card, and is within the reasonable observation range of the eye protection desk lamp, thereby determining whether the eye protection desk lamp meets the eye protection standards.

[0028] Furthermore, when the human eye observes the single-light source clarity test card, the corresponding penumbra threshold corresponding to the clear and complete narrowest line observed indicates the clarity under the current light source.

[0029] Specifically, in the multi-light source clarity test chart, the penumbra threshold of the widest line is the same as the maximum value of the penumbra threshold interval of the multi-light source clarity test chart, and the penumbra threshold of the narrowest line is the same as the minimum value of the penumbra threshold interval of the multi-light source clarity test chart.

[0030] Through the above design, in one embodiment, the benefit is that the penumbra threshold interval of the multi-light source clarity test card limits the penumbra threshold range of the line, so that when the integrity and clarity of the line are observed under illumination, it does not exceed the penumbra threshold interval range of the multi-light source clarity test card, and is within the reasonable observation range of the eye-protection desk lamp, thereby determining whether the eye-protection desk lamp meets the eye protection standards.

[0031] Furthermore, when the human eye observes the multi-light source clarity test card, the corresponding penumbra threshold corresponding to the clear and complete narrowest line observed indicates the clarity under the current light source.

[0032] Specifically, Figure 1As shown, in the test pattern, the line width decreases in the horizontal direction.

[0033] Through the above design, in one embodiment, the benefit is that the line width affects the generation of penumbra. Under lighting conditions, when the line width decreases in the horizontal direction, the naked eye not only has an intuitive perception of the change in line width, but is also affected by the penumbra of lines of different widths. The changes in the clarity and completeness of the lines can be clearly perceived, and then the clarity under the current light source can be judged based on the corresponding penumbra threshold.

[0034] Specifically, the method of the clarity test card comprises the following steps: S1. Use a clarity test card and place it directly below the light-emitting surface of the desk lamp, and limit the distance from the light-emitting surface to 30mm or 20mm; When the desk lamp is a single light source, place the single light source clarity test card directly below the light-emitting surface and 30mm away, which can meet the normal viewing distance of the human eye under the current light source. When the desk lamp is a multi-light source, place the multi-light source clarity test card directly below the light-emitting surface and 20mm away, which can meet the normal observation distance of the human eye under the current light source.

[0035] S2. The clarity test card is illuminated by the light-emitting surface of the desk lamp, showing multiple test patterns. There are scale values ​​at the test patterns. The integrity and clarity of the test patterns are affected by the illumination of the light-emitting surface of the desk lamp. When multiple test patterns are illuminated by light, the integrity and clarity of the test patterns are affected. There are relatively clear and relatively blurred observation phenomena between the test patterns. The scale values ​​of different test patterns are different penumbra thresholds, which can reflect the clarity of the current light source.

[0036] S3. Observe the clarity test card with the naked eye, find the test pattern with the smallest completeness and clarity among the test patterns that can be seen by the naked eye, and record the scale value of the test pattern; The integrity and clarity of the test pattern are affected by the light source. When the test pattern is observed with the naked eye, the penumbra threshold represented by the smallest test pattern among the clearly observable test patterns indicates the clarity of the current light source during illumination. The scale value is recorded for the next step of comparison.

[0037] S4, such as Figure 1 and Figure 2 As shown, it is judged whether the image is presented clearly.

[0038] Through the penumbra threshold represented by the image, it is determined whether the current light source meets the clarity standard required by the eye-protection desk lamp, and the degree of clarity that the current light source can provide.

[0039] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A clarity test card for an eye protection desk lamp, characterized in that: Including single light source clarity test chart and multi-light source clarity test chart; The size of the single light source clarity test card is 210mm*140mm, and the penumbra threshold interval is set to 0.1mm to 0.5mm; The size of the multi-light source clarity test card is 220mm*326mm, and the penumbra threshold interval is set to 0.5mm to 20mm; The edge bleed size of the single light source clarity test card and the multi-light source clarity test card are both 13mm*13mm.

2. The clarity test card for an eye protection desk lamp according to claim 1, characterized in that: The light-transmitting surface material of the single-light-source clarity test card and the multi-light-source clarity test card is selected to be a high-transmittance PE material.

3. The clarity test card for an eye protection desk lamp according to claim 1, characterized in that: The single-light source clarity test card and the multi-light source clarity test card are both provided with test patterns, and the test patterns are graphics arranged in a continuous manner.

4. The clarity test card for an eye protection desk lamp according to claim 3, characterized in that: The graphics are in the form of lines or dots.

5. The clarity test card for an eye protection desk lamp according to claim 4, characterized in that: In the single light source clarity test card, the penumbra threshold of the widest line is the same as the maximum value of the penumbra threshold interval of the single light source clarity test card, and the penumbra threshold of the narrowest line is the same as the minimum value of the penumbra threshold interval of the single light source clarity test card.

6. The clarity test card for an eye protection desk lamp according to claim 4, characterized in that: In the multi-light source clarity test chart, the penumbra threshold of the widest line is the same as the maximum value of the penumbra threshold interval of the multi-light source clarity test chart, and the penumbra threshold of the narrowest line is the same as the minimum value of the penumbra threshold interval of the multi-light source clarity test chart.

7. A clarity test card for an eye protection desk lamp according to claim 5 or claim 6, characterized in that: In the test pattern, the line width decreases sequentially in the horizontal direction.

8. The method for testing the clarity test card according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Use a clarity test card and place it directly below the light-emitting surface of the desk lamp, and limit the distance from the light-emitting surface to 30mm or 20mm; S2, the clarity test card is illuminated by the light-emitting surface of the desk lamp, and a plurality of test patterns are presented, wherein the test patterns have scale values, and the integrity and clarity of the test patterns are affected by the illumination of the light-emitting surface of the desk lamp; S3, observing the clarity test card with the naked eye, finding the test pattern with the smallest integrity and clarity among the test patterns that can be seen clearly by the naked eye, and recording the scale value at the test pattern; S4. Determine whether the image is presented clearly.

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