WO2022186479A1

WO2022186479A1 - Chromaticity measurement device for adjusting position by using reference light

Info

Publication number: WO2022186479A1
Application number: PCT/KR2022/000983
Authority: WO
Inventors: 오병준; 이규호; 김규석; 이현호; 유병건; 나기범; 윤성혁; 문희수
Original assignee: (주)에이앤아이
Priority date: 2021-03-03
Filing date: 2022-01-19
Publication date: 2022-09-09
Also published as: KR20220125822A; JP2024505754A; KR102619436B1; CN116868035A

Abstract

The present invention provides a chromaticity measurement device comprising: a case including an opening having a predetermined area and including a receiving space communicating with the opening; an incident light lens module provided at one side of the case to receive a measurement light emitted from a measurement target; a measurement module disposed behind the incident light lens module in the receiving space to convert light transferred from the incident light lens module to an electric signal, thereby measuring color; and a reference light emitting module for emitting reference light in the case and transferring the reference light to the measurement target via the incident light lens module, wherein the reference light is displayed on the measurement target at a position corresponding to the center of the opening by the incident light lens module.

Description

Chromaticity measuring device that adjusts position using reference light

The present invention relates to a chromaticity measuring apparatus, for precisely measuring chromaticity of a measurement object such as a color display panel, and which can measure chromaticity by adjusting the position of the measurement object using a separate reference light is about

Currently, the global monitor market is rapidly changing from CRT to LCD monitor and from LCD to LED monitor. In particular, as the demand for large-sized LED monitors increases, production is rapidly increasing.

As the production of such displays increases, production quality also acts as one of the important factors, and devices for determining whether the display is defective have been developed. In particular, chromaticity measuring devices have been developed to measure whether the colors expressed in displays such as LCDs or LEDs actually represent the colors to be output.

A general colorimetric device is configured to measure the color of light incident through a detection sensor composed of a photodiode, and measures the color by contacting the measurement object.

Here, the chromaticity output device generally transmits the measurement light through the opening to measure the chromaticity. At this time, the measurement is performed with the opening in close contact with the measurement object. However, when the measurement object or the light exit area of the measurement object is relatively smaller than the size of the opening, there is a problem in that it is difficult for the user to visually confirm the position when the measurement object and the opening are in close contact.

In particular, when the size of the measurement object is small, it is difficult to determine whether it is correctly positioned in the center of the measurement area inside the opening, and when it is deflected to one side, it is difficult to derive accurate measurement results. In addition, when the chromaticity is continuously measured for a plurality of measurement objects, the standard is unclear and the reliability of the measurement result is deteriorated.

An object of the present invention is to solve the problem of the conventional chromaticity measuring device, and it is possible to precisely measure chromaticity by adjusting the correct relative position when measuring a measuring object having a size relatively smaller than that of the measuring area using a separate reference light. To provide a colorimetric device capable of

According to one aspect of the present invention in order to solve the above problems, a case in which an opening of a certain area is formed and a receiving space communicating with the opening is formed therein, the measurement light provided at one side of the case and emitted from the measurement object a light incident lens module for receiving light, a measuring module disposed behind the light incident lens module in the receiving space, converting the light transmitted from the light incident lens module into an electrical signal and measuring a color through this, and a reference light inside the case a reference light emitting module for transmitting the reference light to the measurement object via the light incident lens module by emitting a light; including, wherein the reference light is displayed on the measurement object at a position corresponding to the center of the opening by the light incident lens module.

In addition, the reference light emitting module reflects the reference light emitted from the light emitting unit selectively emitting the reference light from inside the case, and from the light emitting unit inside the accommodation space, and transmits it to the outside through the light incident lens module, and the measurement The light may include a selective reflection unit that transmits the light to the measurement module, and an array unit disposed between the light emitting unit and the selective reflection unit to refract the reference light and transmit the light to the selective reflection unit.

In addition, the selective reflection unit may be disposed to have a predetermined angular inclination on the movement path of the measurement light, and a through hole may be formed in at least a portion to transmit the measurement light.

In addition, the through hole may be formed in a predetermined area in the center of the selective reflection unit to transmit the measurement light without interference.

In addition, the measurement module is disposed in the receiving space and receives the light transmitted by the color filter and the color filter through which the light passing through the light incident lens module is incident and transmits only light of a specific wavelength, and converts the received light into an electrical signal. It may include a photodiode for converting.

In addition, the photodiodes are provided in at least three and convert light incident on each of them into electrical signals, and the color filters are disposed adjacent to each of the photodiodes to transmit light of different wavelengths, respectively. can be done with

In addition, it may include a light distribution module provided between the light incident lens module and the measurement module, to distribute the light incident from the light incident lens module to the measurement module.

According to the present invention in order to solve the above problems, there are the following effects.

A separate reference light output module is provided inside the case to emit reference light and adjust the relative position with the measurement object through this. to measure chromaticity.

In addition, the selective reflector that reflects the measurement light from the reference light emitting module is disposed between the opening and the light distribution module to reflect the reference light and transmit it to the outside. Separately, a through hole is formed to transmit the measurement light without interference There is this.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a diagram schematically showing a colorimetric apparatus according to an embodiment of the present invention;

Fig. 2 is a view showing a state in which the colorimetric apparatus of Fig. 1 is used;

3 is a diagram schematically showing an internal configuration of the colorimetric apparatus of FIG. 1;

FIG. 4 is a view showing a state in which a reference light emitting module operates in the chromaticity measuring device of FIG. 3;

Figure 5 is a view showing the selective reflection unit of Figure 3;

FIG. 6 is a view showing a state in which a measurement position of a measurement object is adjusted through a reference light in the chromaticity measuring apparatus of FIG. 1; and

FIG. 7 is a view showing a state in which a reference light emitting module operates in the color guiding device of FIG. 1 .

A preferred embodiment of the chromaticity measuring apparatus according to the present invention configured as described above will be described with reference to the accompanying drawings. However, this is not intended to limit the present invention to a specific form, but to help a clearer understanding through the present embodiment.

In addition, in the description of the present embodiment, the same names and the same reference numerals are used for the same components, and an additional description thereof will be omitted.

First, a chromaticity measuring apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5 .

1 is a diagram schematically showing a chromaticity measuring device according to an embodiment of the present invention, FIG. 2 is a diagram showing a state in which the chromaticity measuring device of FIG. 1 is used, and FIG. 3 is an internal configuration of the chromaticity measuring device of FIG. 1 is a diagram schematically showing

4 is a view showing a state in which the reference light emitting module operates in the chromaticity measuring device of FIG. 3 , and FIG. 5 is a view showing the selective reflection unit of FIG. 3 .

As shown, the chromaticity measuring apparatus according to an embodiment of the present invention is an apparatus for measuring a color by emitting measurement light in a state in which the measurement object D is disposed in front, and receiving the light.

In general, in the chromaticity measuring apparatus, the measurement light emitted from the measurement object D is input through the opening 210 forming the opening area of a certain area, and the emission area from which the measurement light is emitted is relatively larger than the opening area. It is formed to be large so that the opening area is located in the center of the measurement area when measuring chromaticity. However, the chromaticity measuring apparatus according to the present invention measures the chromaticity of the measurement light emitted from the measurement object D having a relatively smaller size than the size of the opening area or the measurement object D having the emission area.

Specifically, the chromaticity measuring device according to the present invention measures the chromaticity of the case 100 with one side opened toward the measurement object D, the light incident lens module 200 disposed on one side of the case 100, and the measurement light. It includes a measurement module 300, a reference light output module 500 for irradiating a reference light P toward the measurement object D, and a light distribution module 400 for transmitting the measurement light inside the case 100.

The case 100 surrounds the whole and has an accommodating space 110 therein, one side has an opening 210 and communicates with the inside, and the light incident lens module 200 is disposed adjacent to the opening 210 . . In addition, the measuring module 300 , the emitting module and the light distribution module 400 are provided in the receiving space 110 to transmit and measure the measurement light incident through the opening 210 . At this time, the case 100 may be provided in a form in which the light incident lens module 200 is detachably provided, or alternatively, may be provided in a form integrally accommodated therein.

In the present embodiment, the case 100 is configured to surround the entirety, and the opening 210 is formed on one side along the longitudinal direction to form a movement path through which the measurement light moves. In addition, the light incident lens module 200 , the light distribution module 400 , and the measurement module 300 are provided in the receiving space 110 along the movement path of the measurement light.

The light incident lens module 200 is disposed in a region from which light is emitted from the measurement object D on one side of the case 100 and transmits the emitted light to the inside. Here, the light incident lens module 200 is formed in a form in which a plurality of different lenses are continuously arranged, so that the light emitted from the measurement object D is condensed and delivered to the inside of the case 100 . In this case, the light incident lens module 200 may be disposed behind the opening 210 inside the case 100 and configured to have a size corresponding to a measurement area formed by the opening 210 .

On the other hand, the light incident lens module 200 is configured as a separate module as shown and is configured to be selectively coupled to at least one of the case 100 or the light distribution module 400 described above, and the measurement It may be configured to be replaceable according to the size of the area.

On the other hand, the light distribution module 400 is provided between the light incident lens module 200 and the measurement module 300 to distribute the light incident from the light incident lens module 200 to the measurement module 300 . transmit

At this time, in the present embodiment, as shown in the figure, when measuring the color, the color is measured using three stimulus values, and the present embodiment is not limited thereto and may be configured in various forms.

Accordingly, the light distribution module 400 divides the light having the same wavelength and intensity as the incident light and transmits it to the measurement module 300 , and the transmitted light is divided into three pieces by a separate color filter 310 . The light transmitted to each of the photodiodes 320 is configured to be transmitted with different wavelengths.

In this embodiment, the light distribution module 400 is provided inside the cylindrical cover as described above, and the cylindrical cover is disposed inside the case 100 . In addition, one side is disposed adjacent to the light incident lens module 200 , and the other side is disposed adjacent to the measurement module 300 .

Specifically, the light distribution module 400 includes a plurality of the optical fibers as shown in FIG. 3, receives the light incident through the light incident lens module 200, and divides it into three paths to the measurement module ( 300) is forwarded. Here, since the optical fiber is generally formed to be smaller than the light incident lens module 200, in order to receive all the light transmitted from the light incident lens module 200, the light incident lens module 200 refracts and transmits the incident light. do.

The optical fiber is composed of a plurality and arranged in the same direction, one side is densely arranged with each other to receive transmitted light, and the other side is largely divided into three groups and transmitted to the measurement module 300 to be described later.

In this embodiment, the plurality of optical fibers are all configured with the same size, and the other side is divided into three groups, and each group has the same number.

And since the optical fibers are all made of the same size, even if the other side is divided into three groups, if the same number is maintained, the light transmitted to each of the measurement modules 300 may have the same wavelength and intensity. However, the present invention is not limited thereto, and even if each of the optical fibers has a different size, any shape may be applied as long as it is configured to transmit light of the same wavelength and intensity to each of the measurement modules 300 .

In this way, the light distribution module 400 equally transmits the light incident between the light incident lens module 200 and the measurement module 300 to each of the measurement modules 300 .

On the other hand, the measurement module 300 detects the light incident from the light incident lens module 200 and measures the color of the light of the corresponding wavelength, and the photodiode 320 converts the received light into an electrical signal. and the color filter 310 for allowing the light transmitted to the photodiode 320 to have a specific wavelength.

Specifically, the color filter 310 receives the light transmitted from the light incident lens module 200 and transmits only light of a specific wavelength. In this case, as the color filter 310, filters of various types and structures may be used, and an interference filter is used in this embodiment.

An interference filter is a filter that filters out waves of a specific wavelength by using the interference phenomenon that occurs on a thin film. It is divided into several types according to the method of obtaining the desired wave and the type of filter material.

On the other hand, the photodiode 320 is configured to receive the light incident through the light incident lens module 200 and sense a color, and is composed of at least one and detects the light transmitted from the light distribution module 400 . do.

Specifically, the photodiode 320 is a kind of sensor that receives light and converts it into an electrical signal, which is provided in the accommodating space 110 provided inside the case 100, The light incident through the color filter 310 is received and converted into an electrical signal. The received electrical signal is used to measure the color of the light received by a separate external device.

As described above, the measurement module 300 is provided inside the case 100 to detect the color of light of a specific wavelength among the light incident through the light incident lens module 200 . In addition, the measurement module 300 includes a circuit for amplifying and converting a signal measured in conjunction with the photodiode 320 , and through this, accurate chromaticity can be measured.

On the other hand, in the present embodiment, the measurement module 300 is composed of at least three or more as described above, and is configured independently of each other inside the case 100 .

In this case, each of the color filters 310 is configured to transmit light of different wavelengths, and is disposed adjacent to the front of each of the photodiodes 320 . In general, the measurement module 300 measures the color using the tri-color stimulus values by a standard observer prescribed by the Commission International de I'Eclairage (CIE).

The tri-color stimulus value is a value representing the color of light recognized through three cone cells that detect light of different wavelengths in the human eye, and is a standard value for expressing light. Then, in order to accurately measure the respective tri-color stimulus values, light of three regions, X, Y, and Z, which are tri-color stimulus values, is separated and the color is measured through the photodiode 320 .

That is, the color filter 310 is provided on the movement path of the light transmitted from the light distribution module 400 and transmits only the light of a specific wavelength to the photodiode 320 , and in this embodiment, the color filter 310 and the photodiode 320 are each configured to be separated from each other into three pieces.

As described above, the measurement module 300 according to the present invention includes the color filter 310 and the photodiode 320 to measure the color of the light emitted from the measurement object D.

Next, the reference light emitting module 500 is separately provided inside the case 100 and selectively irradiates the reference light P to the outside through the opening 210 , and the front of the opening 210 . The reference light (P) is irradiated to the measurement object (D) located in the. At this time, the reference light P is displayed on the measurement object D at a position corresponding to the center of the opening 210 by the light incident lens module 200, and through this, the measurement object D and the opening ( 210) so that the center of the measurement object D is located at the center of the measurement area.

Specifically, the reference light emitting module 500 emits the reference light P from the inside of the case 100, refracts or reflects it at least once or more, and transmits it to the outside of the case 100, and is largely a light emitting part 520. , a selective reflection unit 510 and an array unit 530 .

The light emitting unit 520 is configured to emit the reference light P, is provided inside the case 100, operates selectively, and transmits the light so as not to interfere with the measurement light.

Specifically, the light emitting unit 520 is a general light irradiator, has a luminance above a certain level, and irradiates the reference light P, but is provided on one side of the accommodation space 110 and selectively operates. At this time, the light emitting unit 520 is configured to irradiate light in a high straightness form like a general laser pointer, and is reflected or refracted by the selective reflection unit 510 to be described later to the outside through the opening 210 . is transmitted

In this embodiment, the light emitting unit 520 is disposed in a position spaced apart from one side on the path of the measurement light inside the case 100 as shown in the figure, and in a direction intersecting the movement path of the measurement light. The reference light P is emitted.

Meanwhile, the selective reflection unit 510 is configured to reflect the reference light P emitted from the light emitting unit 520 and transmit it toward the opening 210 , and the light emitting unit inside the receiving space 110 . It is disposed in front of the 520 and reflects the reference light P to the opening 210 . At this time, the selective reflection unit 510 is composed of at least one or more and may be spaced apart from each other in the receiving space 110 , and each reflects the reference light P and transmits it to the opening 210 .

In the present invention, the selective reflection unit 510 is disposed in front of the light emitting unit 520 on the path along which the measurement light travels and is disposed to have a predetermined inclination. At this time, the selective reflection unit 510 is configured to reflect the reference light (P) and transmit it to the outside through the light incident lens module 200, and at the same time, the measurement light is transmitted and transmitted to the measurement module 300. is configured to

In more detail, the selective reflection unit 510 according to the present invention has a through hole 512 formed in at least part of it as shown, so that the measurement light is transmitted through the through hole 512, and the reference light ( P) is reflected through the remaining portion and is configured to be transmitted to the light incident lens module 200 .

Here, the selective reflection unit 510 is disposed between the light incident lens module 200 and the light distribution module 400 and is disposed on the movement path of the measurement light, but interference does not occur by transmitting the measurement light. make sure not to

In this embodiment, as shown in FIG. 5 , in the selective reflection unit 510 , the through hole 512 is formed in a central portion with a predetermined area, and between the light incident lens module 200 and the light distribution module 400 . is arranged to have an inclination at The reference light P emitted from the light emitting unit 520 is reflected through an edge portion except for the central portion and transmitted to the light incident lens module 200 .

Accordingly, the selective reflection unit 510 can transmit the reference light P without interference even though the through hole 512 is formed and disposed on the movement path of the measurement light.

In the present embodiment, the selective reflection unit 510 is disposed in a fixed position between the light incident lens module 200 and the light distribution module 400 in the receiving space 110, but unlike the drawing, it is not shown in the drawing. Although not shown, the selective reflection unit 510 may be configured such that the position inside the case 100 is adjusted.

Specifically, the selective reflection unit 510 is selectively adjusted in position in conjunction with the operation of the light emitting unit 520 in the receiving space 110, and at least a portion is configured to be located on the movement path of the measurement light. At this time, the position of the selective reflection unit 510 may be moved in a state with a predetermined angle of inclination within the accommodation space 110 , or the inclination angle itself may be adjusted.

Accordingly, when the light emitting unit 520 operates, the selective reflection unit 510 is moved between the light incident lens module 200 and the light distribution module 400 to reflect the reference light P, When the light emitting unit 520 does not operate, it deviates from the movement path of the measurement light and does not interfere with the transmission of the measurement light to the light distribution module 400 .

As described above, the selective reflection unit 510 may be fixedly disposed between the light incident lens module 200 and the light distribution module 400 by having the through hole 512 as in this embodiment, and in a different position is not fixed but moves when necessary and may be configured to reflect the reference light P.

Meanwhile, the array unit 530 is disposed between the light emitting unit 520 and the selective reflection unit 510 to refract the reference light P and transmits it to the selective reflection unit 510 . Specifically, the selective reflection unit 510 has the through hole 512 formed in the central portion as shown, and accordingly, the reference light P emitted from the light emitting unit 520 is transmitted to the array unit 530 . is transmitted to the edge of the selective reflection unit 510 by

And as shown in FIG. 4 , the reference light P is reflected from the selective reflection unit 510 , passes through the edge of the light incident lens module 200 , and refracts to be condensed on the measurement object D .

As described above, the reference light emitting module 500 includes the light emitting unit 520 , the selective reflection unit 510 and the array unit 530 , and emits the reference light P from the inside of the case 100 . It is transmitted to the measurement object (D) through the opening (210). And, by disposing the reference light P in the central portion of the measurement object D, the measurement light is transmitted through the central portion of the opening 210 even if the measurement light is emitted from the measurement object D thereafter. can be measured correctly.

At this time, the reference light emitting module 500 is preferably operated in a state in which the measurement light is not emitted from the measurement object (D).

Next, referring to FIGS. 6 and 7 , the operating state of the chromaticity measuring apparatus according to the present invention is as follows.

6 is a view showing a state in which the measurement position of the measurement object D is adjusted through the reference light P in the chromaticity measuring device of FIG. It is a diagram showing the operating state.

First, referring to (a) of FIG. 6 , the reference light P emitted from the reference light emission module 500 is located in the emission area of the measurement object D. FIG. Here, as shown, it can be seen that the emission area of the measurement object D is relatively smaller than the measurement area according to the size of the opening 210, and the emission area is deflected to one side of the measurement area. . At this time, the reference light P is located at a position deflected to one side in the emission area of the measurement object D, and the user can visually confirm it.

In this case, even if the measurement light is emitted from the measurement object D, an error may occur during precise chromaticity measurement because it flows into the interior through the edge portion rather than the central portion of the light incident lens module 200 .

Accordingly, as shown in FIG. 6(b), the user adjusts the position of the reference light P to be located in the center of the emission area of the measurement object D, so that the emission area of the measurement object D is the opening 210 Even if it is smaller than the size of

That is, before measuring the chromaticity of the measurement light from the measurement object D, the relative position with the measurement object D may be adjusted through the reference light P.

In more detail, as shown in FIG. 7 , the reference light emitting module 500 is operated in a state where the measurement object D is disposed in front of the opening 210 to provide the measurement object D and the present invention. After adjusting the relative position of the chromaticity measuring device, the chromaticity of the measurement light can be measured by operating the measurement object D and simultaneously releasing the operation of the reference light P emitting device.

As described above, in the chromaticity measuring apparatus according to the present invention, even if the emission area of the measurement object D has a relatively small size compared to the measurement area of the opening 210, the measurement object D is measured through the reference light P. By adjusting the relative position, when the measurement light is emitted, it is transmitted to the inside through the central portion of the light incident lens module 200 to minimize refraction so that chromaticity can be precisely measured.

As described above, preferred embodiments according to the present invention have been described, and in addition to the above-described embodiments, they may be embodied in other forms without departing from the spirit or scope of the present invention. Therefore, the present embodiment is to be regarded as illustrative rather than restrictive in a particular form, and accordingly, the present invention is not limited to the above description, but may be modified within the scope of the appended claims and their equivalents.

(부호의 설명)(Explanation of symbols)

100: case

200: light incident lens module

300: measurement module

400: light distribution module

500: reference light output module

D: Measured object

P: reference light

Claims

a case having an opening having a predetermined area and having an accommodating space communicating with the opening therein;

a light incident lens module provided on one side of the case to receive the measurement light emitted from the measurement object;

a measuring module disposed behind the light incident lens module in the accommodating space, converting the light transmitted from the light incident lens module into an electrical signal, and measuring a color through this; and

a reference light emitting module for emitting a reference light from inside the case and transmitting the reference light to the measurement object via the light incident lens module; includes,

The reference light is displayed on the measurement object at a position corresponding to the center of the opening by the light incident lens module.
The method of claim 1,

The reference light emitting module,

a light emitting unit selectively emitting the reference light from the inside of the case;

a selective reflection unit that reflects the reference light emitted from the light emitting unit in the receiving space and transmits it to the outside through the light incident lens module, and transmits the measurement light to the measuring module; and

an array unit disposed between the light emitting unit and the selective reflection unit to refract the reference light and transmit it to the selective reflection unit;

A colorimetric device comprising a.
3. The method of claim 2,

The selective reflector,

A chromaticity measuring device is disposed to have a predetermined inclination on a movement path of the measurement light, and a through hole is formed in at least a part of the measurement light to transmit the measurement light.
4. The method of claim 3,

The through hole is

Chromaticity measuring device, characterized in that formed in a predetermined area in the central portion of the selective reflection portion to transmit the measurement light without interference.
According to claim 1,

The measurement module is

A color filter disposed in the receiving space, through which the light passing through the light incident lens module is incident, transmits only light of a specific wavelength, and a photodiode that receives the light transmitted by the color filter and converts the received light into an electrical signal. A colorimetric device, characterized in that
6. The method of claim 5,

The photodiode is provided in at least three or more and converts light incident on each into an electrical signal,

The color filter is disposed adjacent to each of the photodiodes to transmit light of different wavelengths, respectively.
The method of claim 1,

and a light distribution module provided between the light incident lens module and the measurement module to distribute the light incident from the light incident lens module to the measurement module.