Viewing angle measurement method and apparatus for display including multiaxial rotary platform

Abstract

A viewing angle measurement apparatus for a display, comprising a multiaxial rotary platform, according to an embodiment of the present invention, may comprise: a measurement sample mounting unit on which a measurement sample of a display is mounted; a measurement device mounting unit to which a measurement device for measuring the measurement sample is coupled; a position driving unit that is installed on a bottom portion of the measurement sample mounting unit and moves the measurement sample mounting unit in first, second, and third directions; and a first-direction rotation driving unit that is provided on a bottom portion of the position driving unit and drives rotation of the position driving unit around a first-direction rotation axis.

Description

Device and method for measuring the viewing angle of a display including a multi-axis rotating platform

[0001] The present invention relates to a viewing angle measuring device and a measuring method for a display including a multi-axis rotating platform.

[0002] Displays such as LCDs or projectors can be installed considering the viewing angle, but users may find it difficult to view the video screen normally from viewing positions other than directly in front of the display due to the limited viewing angle.

[0003] For example, due to their structural characteristics, displays using LCDs may exhibit differences in overall brightness or brightness between individual RGB pixels depending on the viewing angle.

[0004] Therefore, since the light emission of a display with an anisotropic viewing angle varies depending on the horizontal rotation direction and planar rotation direction of the substrate, it is necessary to measure the viewing angle for the entire 360-degree solid angle.

[0005] However, since field of view measurement using a goniometer is performed by the rotation of the substrate or the single-axis rotation of the measuring equipment, it has the disadvantage that multi-axis measurement is difficult and horizontal plane rotation on substrates with various rotation axes is difficult to measure.

[0006] Moreover, the viewing angle measuring device, which automatically measures the viewing angle of a display while rotating within a radius of 2m around the display, is an expensive automated measuring device costing hundreds of millions of won.

[0007]

[0008] Accordingly, the inventor of the present invention has completed the present invention after conducting long-term research and undergoing trial and error to develop a technology for a display viewing angle measuring device and method comprising a multi-axis rotating platform configured to facilitate the measurement of surface-emitting elements such as OLEDs and anisotropic viewing angles at various light-emitting axes, and to control the light-emitting area of ​​a measurement target through the adjustment of measurement distance and focus.

[0009] According to one embodiment of the present invention, a viewing angle measuring device and a measuring method for a display can be provided, comprising a multi-axis rotating platform configured to more easily measure the viewing angle light emission characteristics of a display having an anisotropic viewing angle at various light emission axes.

[0010]

[0011] Meanwhile, other unspecified objects of the present invention will be further considered to the extent that they can be easily inferred from the following detailed description and effects.

[0012] According to an embodiment of the present invention, a viewing angle measuring device for a display including a multi-axis rotating platform may include: a measuring sample mounting unit in which a measuring sample of the display is mounted; a measuring device mounting unit to which a measuring device for measuring the measuring sample is coupled; a position driving unit installed at the bottom of the measuring sample mounting unit and moving the position in a first, second, and third direction; and a first direction rotation driving unit provided at the bottom of the position driving unit and driving the rotation of the position driving unit around a rotation axis of the first direction.

[0013] The above measurement sample mounting unit may include a measurement sample holder for fixing a measurement sample; and a second-direction rotation drive unit for rotating the measurement sample holder around a second-direction rotation axis.

[0014] The above measuring device mounting unit may include a device holder fixed to the upper part of the base; and a camera lens fixed to the device holder and measuring the field of view of the measurement sample.

[0015] The above measuring instrument mounting unit may further include a spectroradiometer that is fixed to the instrument holder and measures luminescence characteristic parameters, such as spectrum and luminance, for a measurement sample at different angles.

[0016] The above position drive unit may include: a third direction position drive unit coupled to the lower part of the measurement sample mounting unit and moving the third direction position of the measurement sample; a first direction position drive unit coupled to the lower part of the third direction position drive unit and moving the first direction position of the measurement sample; and a second direction position drive unit coupled to the lower part of the first direction position drive unit and moving the second direction position of the measurement sample.

[0017] In addition, the viewing angle measuring device of a display including a multi-axis rotation platform may further include a second direction base position driving unit installed between the lower part of the first direction rotation driving unit and the base, which moves the second direction position of the first direction rotation driving unit.

[0018] Meanwhile, a method for measuring the viewing angle of a display including a multi-axis rotating platform is a method for measuring the viewing angle of a display for measuring a measurement sample of a measurement sample holder, wherein the measurement sample of the measurement sample holder is rotated around a second direction rotation axis by controlling a second direction rotation drive unit, and then rotated around a first direction rotation axis by controlling a first direction rotation drive unit to measure the viewing angle.

[0019] According to one embodiment of the present invention, a viewing angle measuring device and method for a display including a multi-axis rotating platform can easily measure surface-emitting elements such as OLEDs at various light-emitting axes, enable simple and accurate measurement of the anisotropic viewing angle of the display, measure parameters for measuring light emission characteristics such as spectrum and luminance by angle using a spectroradiometer, and provide substantial and practical effects such as the ability to adjust the area of ​​the light-emitting surface to be measured through the adjustment of the measurement distance and focus.

[0020]

[0021] Meanwhile, it should be added that even if an effect is not explicitly mentioned here, the effects described in the following specification and the provisional effects expected by the technical features of the present invention are treated as described in the specification of the present invention.

[0022] FIG. 1 is a side view illustrating a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention.

[0023] FIG. 2 is a configuration photograph illustrating a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention.

[0024] FIG. 3 is a magnified partial photograph illustrating a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention.

[0025] FIG. 4 is a photograph illustrating Example 1 by a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention.

[0026] FIG. 5 is a photograph illustrating Example 2 by a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention.

[0027] FIG. 6 is a photograph illustrating Example 3 by a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention.

[0028]

[0029] It should be noted that the attached drawings are provided as examples for reference to help understand the technical concept of the present invention, and the scope of the rights of the present invention is not limited by them.

[0030]

[0031] In describing the present invention, detailed descriptions of related known functions are omitted if they are deemed obvious to a person skilled in the art and could unnecessarily obscure the essence of the invention.

[0032] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0033] The size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and therefore the present invention is not necessarily limited to what is illustrated. In the drawings, the first direction may be defined as the height direction, the second direction as the front-to-back distance direction, and the third direction as the left-to-right direction.

[0034] Hereinafter, embodiments of a viewing angle measuring device and measuring method for a display including a multi-axis rotating platform according to the present invention will be described in detail with reference to the accompanying drawings. In describing with reference to the accompanying drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted.

[0035] FIG. 1 is a side view illustrating a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention, FIG. 2 is a configuration photograph illustrating a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention, and FIG. 3 is a partial enlarged photograph illustrating a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention.

[0036] As illustrated in FIGS. 1 to 3, a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention may include a measuring sample mounting unit (100) for fixing a measuring sample of a surface-emitting element such as an OLED, and a measuring device mounting unit (200) for mounting a measuring device for measuring the viewing angle, etc. of a measuring sample mounted on the measuring sample mounting unit (100).

[0037] At this time, in a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention, the measuring sample mounting unit (100) may be composed of a measuring sample holder (110) and a second direction rotation driving unit (120).

[0038] Here, in the measurement sample mounting unit (100) of the viewing angle measuring device of a display including a multi-axis rotating platform according to an embodiment of the present invention, the measurement sample holder (110) can be designed to fix a measurement sample, i.e., a display of a surface-emitting element such as an OLED, to the front side of the second direction to measure emission characteristic parameters such as spectrum and brightness at each angle and to measure the viewing angle at various emission axes.

[0039] In addition, in the measurement sample mounting unit (100) of the viewing angle measuring device of a display including a multi-axis rotation platform according to an embodiment of the present invention, the second direction rotation driving unit (120) may be provided to be coupled to the second direction rear side of the measurement sample holder (110).

[0040] At this time, in the measurement sample mounting unit (100) of the viewing angle measuring device of a display including a multi-axis rotation platform according to an embodiment of the present invention, the second direction rotation driving unit (120) can act to rotate the measurement sample holder (110) around the second direction rotation axis.

[0041] Ultimately, in the measurement sample mounting unit (100) of the viewing angle measuring device of a display including a multi-axis rotation platform according to an embodiment of the present invention, the second direction rotation driving unit (120) can rotate the measurement sample fixed to the second direction front side of the measurement sample holder (110) around the second direction rotation axis.

[0042] In addition, in a display viewing angle measuring device including a multi-axis rotating platform according to an embodiment of the present invention, the measuring device mounting unit (200) may be equipped with a measuring device for measuring the viewing angle, etc. of a measuring sample mounted on the measuring sample mounting unit (100).

[0043] In a display viewing angle measuring device including a multi-axis rotating platform according to an embodiment of the present invention, the measuring device mounting unit (200) may include a device holder (230), a spectroradiometer (210) and a camera lens (220) fixed to the upper part of the device holder.

[0044] At this time, the spectroradiometer (210) of the measuring device mounting unit (200) can measure luminescence characteristic parameters such as spectrum and luminance for the measuring sample mounted in the measuring sample mounting unit (100) at different angles.

[0045] Additionally, the camera lens (220) of the measuring device mounting unit (200) may be configured to measure the field of view of the measuring sample mounted on the measuring sample mounting unit (100).

[0046] In addition, the viewing angle measuring device of a display including a multi-axis rotating platform according to an embodiment of the present invention may be provided with a position driving unit that moves the position of a measurement sample mounting unit (100) in the first, second, and third directions, and the position driving unit may be composed of a third direction position driving unit (300), a first direction position driving unit (400), and a second direction position driving unit (500).

[0047] In a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention, the position driving unit may have a third direction position driving unit (300) coupled to the lower part of the measurement sample mounting unit (100).

[0048] Here, in a viewing angle measuring device of a display including a multi-axis rotating platform according to an embodiment of the present invention, a third direction position driving unit (300) can act to move a measuring sample mounting unit (100) along a third direction.

[0049] Ultimately, in a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention, the measuring sample of the measuring sample mounting unit (100) can be adjusted so that its position in the third direction is moved by the third direction position driving unit (300), and its center axis in the second direction coincides with the center axis in the second direction of the spectroradiometer (210) or the center axis in the second direction of the camera lens (220) that is fixed to the upper part of the device holder (230).

[0050] In addition, in a viewing angle measuring device for a display including a multi-axis rotation platform according to an embodiment of the present invention, the position driving unit may have a first direction position driving unit (400) coupled to one side of a third direction position driving unit (300).

[0051] At this time, in the display viewing angle measuring device including a multi-axis rotation platform according to an embodiment of the present invention, the first direction position driving unit (400) may be coupled to one side of the third direction position driving unit (300).

[0052] The first direction position drive unit (400) can be adjusted so that the second direction center axis of the measurement sample aligns with the second direction center axis of the spectroradiometer (210) or the second direction center axis of the camera lens (220) by moving the third direction position drive unit (300) in the first direction to move the first direction position of the measurement sample mounting unit (100).

[0053] In a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention, a position driving unit may have a first direction position driving unit (400) fixedly coupled to the upper part of a second direction position driving unit (500) by a bracket (510).

[0054] Here, in a viewing angle measuring device for a display including a multi-axis rotation platform according to an embodiment of the present invention, when the second direction position driving unit (500) is driven, the first direction position driving unit (400) can move its position in the second direction.

[0055] By moving the measurement sample fixed to the measurement sample holder (110) of the position measurement sample mounting unit (100) in the second direction according to the second direction position movement of the first direction position driving unit (400), the measurement sample can be moved in the second direction, and the measurement distance and focus with the spectroradiometer (210) or camera lens (220) can be adjusted, thereby allowing the light-emitting surface area of ​​the measurement sample to be adjusted.

[0056] In a viewing angle measuring device for a display including a multi-axis rotation platform according to an embodiment of the present invention, a first direction rotation drive unit (600) may be configured to be coupled to the lower part of a second direction position drive unit (500) and to rotate the second direction position drive unit (500) around a rotation axis of the first direction.

[0057] At this time, when the second direction position drive unit (500) is rotated around the first direction rotation axis by the first direction rotation drive unit (600), the measurement sample fixed to the measurement sample holder (110) of the position measurement sample mounting unit (100) rotates around the first direction rotation axis, and its field of view can be measured through the camera lens (220).

[0058] In addition, in a viewing angle measuring device for a display including a multi-axis rotation platform according to an embodiment of the present invention, a second direction base position driving unit (700) is coupled to the lower part of a first direction rotation driving unit (600) and can act to move the first direction rotation driving unit to a position in the second direction.

[0059] In particular, in a display viewing angle measuring device including a multi-axis rotating platform according to an embodiment of the present invention, a second direction base position driving unit (700) and a measuring device mounting unit (200) may be installed on the upper part of a base (800) at a certain distance from each other.

[0060] Here, the second direction base position drive unit (700) is provided to be fixed to the upper part of the base (800) and can act to simultaneously move the first direction rotation drive unit (600), the second direction position drive unit (500), the first direction position drive unit (400), the third direction position drive unit (300), and the measurement sample mounting unit (100) in the second direction.

[0061]

[0062] Preferred embodiments are presented below to aid in understanding the present invention.

[0063] However, the following examples are provided only to aid in understanding the present invention, and the present invention is not limited by the following examples.

[0064]

[0065] [Example 1]

[0066] FIG. 4 is a photograph illustrating Example 1 by a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention.

[0067] As shown in FIG. 4, the first direction rotation drive unit (600) was controlled so that the measurement sample fixedly mounted in the measurement sample holder (110) rotated 0° → 10° → 30° → 50° → 70° around the first direction rotation axis.

[0068] At this time, in the first embodiment, the viewing angle for the number “2” marked on the measurement sample was measured through the camera lens (220) according to each rotation angle of the measurement sample.

[0069] When the measurement sample is rotated around the first rotation axis, the “2” of the measurement sample measured by the camera lens (220) appears clear but dark when rotated 0°, the “2” of the measurement sample measured by the camera lens (220) is displayed brightly and clearly when rotated 10°, the “2” of the measurement sample measured by the camera lens (220) appears bright but double-overlapping when rotated 30°, the “2” of the measurement sample measured by the camera lens (220) appears dark and double-overlapping, showing only a part rather than the whole, and the “2” of the measurement sample measured by the camera lens (220) appears out of focus and only a part when rotated 70°.

[0070] As shown in the viewing angle sample photo illustrated in Fig. 4, the “2” of the measurement sample was most clearly displayed when the measurement sample was rotated 10°, and from this, it can be determined that the measurement sample of Example 1 forms an optimal viewing angle around a rotation angle of 10° around the first direction rotation axis.

[0071]

[0072] [Example 2]

[0073] FIG. 5 is a photograph illustrating Example 2 by a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention.

[0074] As shown in FIG. 5, the second direction rotation drive unit (120) of the measurement sample mounting unit (100) was controlled so that the measurement sample fixedly mounted on the measurement sample holder (110) rotated 0° → 10° → 30° → 50° → 90° around the second direction rotation axis.

[0075] At this time, in the present embodiment 2, the viewing angle for the number “2” marked on the measurement sample was measured through the camera lens (220) according to each rotation angle of the measurement sample.

[0076] Upon examination, when the measurement sample is rotated around the second direction rotation axis, the “2” of the measurement sample measured by the camera lens (220) was measured with the same image quality at rotation angles of 0° → 10° → 30° → 50° → 90°.

[0077] From these results, it can be confirmed that the measurement sample of Example 2 does not affect the viewing angle at all when rotated around the second direction rotation axis.

[0078]

[0079] [Example 3]

[0080] FIG. 6 is a photograph illustrating Example 3 by a viewing angle measuring device for a display including a multi-axis rotating platform according to an embodiment of the present invention.

[0081] As shown in FIG. 6, the second direction rotation drive unit (120) of the measurement sample mounting unit (100) is controlled to rotate the measurement sample fixedly mounted on the measurement sample holder (110) from 0° → 10° → 30° → 50° → 90° around the second direction rotation axis, and then the first direction rotation drive unit (600) is controlled to rotate the measurement sample fixedly mounted on the measurement sample holder (110) from 0° → 10° → 30° → 50° → 70° around the first direction rotation axis.

[0082] Thus, in the present embodiment 3, the measurement sample can be rotated around the second direction axis of rotation to measure the viewing angle at various rotation angles, and then rotated again around the first direction axis of rotation to measure the viewing angle at various rotation angles in the same manner.

[0083] Ultimately, it can be confirmed that the field of view of the measurement sample can be measured in the first and second light emission axes through the above Example 3.

[0084]

[0085] The scope of protection of the present invention is not limited to the description and expression of the embodiments explicitly described above. Furthermore, it is added once again that the scope of protection of the present invention cannot be limited by obvious changes or substitutions in the technical field to which the present invention belongs.

[0086] [Explanation of the symbol]

[0087] 100; Measurement sample mounting unit

[0088] 200: Measuring instrument mounting unit

[0089] 300; third-direction position drive unit

[0090] 400; First directional position drive unit

[0091] 500; Second directional position drive unit

[0092] 600; First direction rotation drive unit

[0093] 700; Second direction base position drive unit

[0094] 800; Base

Claims

1. A measurement sample mounting unit on which a measurement sample of a display is mounted; A measuring device mounting unit to which a measuring device for measuring the above-mentioned measurement sample is coupled; A position driving unit installed at the lower part of the above-mentioned measurement sample mounting unit and moving the position in the first, second, and third directions; and A first direction rotation drive unit provided at the lower part of the above position drive unit and driving the rotation of the above position drive unit around a first direction rotation axis; including, A viewing angle measuring device for a display including a multi-axis rotating platform.

2. In Paragraph 1, The above measurement sample mounting unit is, A measurement sample holder for fixing a measurement sample; and A second-direction rotation drive unit that rotates the above-mentioned measurement sample holder around a second-direction rotation axis; including, A viewing angle measuring device for a display including a multi-axis rotating platform.

3. In Paragraph 1, The above measuring instrument mounting unit is, A device holder fixed to the upper part of the base; and A camera lens that is fixed to the above device holder and measures the field of view of the above measurement sample; including, A viewing angle measuring device for a display including a multi-axis rotating platform.

4. In Paragraph 3, The above measuring instrument mounting unit is, A spectroradiometer that is fixed to the above-mentioned instrument holder and measures emission characteristic parameters, such as spectrum and luminance, for a measurement sample at different angles; including, A viewing angle measuring device for a display including a multi-axis rotating platform.

5. In Paragraph 1, The above position drive unit is, A third-direction position driving unit coupled to the lower part of the above-mentioned measurement sample mounting unit and moving the third-direction position of the measurement sample; A first direction position driving unit coupled to the lower part of the third direction position driving unit and moving the first direction position of the measurement sample; and A second direction position driving unit coupled to the lower part of the first direction position driving unit and moving the second direction position of the measurement sample; including, A viewing angle measuring device for a display including a multi-axis rotating platform.

6. In Paragraph 1, A second direction base position drive unit installed between the lower part of the first direction rotation drive unit and the base, which moves the second direction position of the first direction rotation drive unit; including, A viewing angle measuring device for a display including a multi-axis rotating platform.

7. A method for measuring the viewing angle of a display, wherein the viewing angle of a measurement sample of a measurement sample holder is measured. A method for measuring a measurement sample of a measurement sample holder by controlling the measurement sample of a second direction rotational drive unit to rotate the sample around a second direction rotational axis, and then controlling the first direction rotational drive unit to rotate the sample around a first direction rotational axis to measure the field of view. A method for measuring the viewing angle of a display including a multi-axis rotating platform.

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