Patent Application
20190063995
This application claims priority to Chinese Patent Application No. 201710756440.3 filed on Aug. 29, 2017, which is incorporated herein by reference in its entirety.
The present disclosure relates to the detection of an optical element, in particular to a color parameter measurement device and a color parameter measurement method.
Currently, color analysis on a display panel is mainly performed using a beam-splitting spectrometer, i.e., wavelength components of light beams from the display panel in a chromaticity spectrum are measured and treated so as to acquire a color parameter of the display panel. It takes a very long time period, e.g., more than one second, for this measurement. In the case that the beam-splitting spectrometer is adopted during the production of the display panel, the product line efficiency may be significantly adversely affected, and a measurement time period may increase.
In one aspect, the present disclosure provides in some embodiments a color parameter measurement device, including a beam-splitting assembly, a light-beam-in-first-color filter, a light-beam-in-second-color filter, a light-beam-in-third-color filter, a light-beam-in-first-color receiver, a light-beam-in-second-color receiver, a light-beam-in-third-color receiver, and a processor. The beam-splitting assembly is configured to split a display light beam from a to-be-tested display panel into at least a first testing light beam, a second testing light beam and a third testing light beam. The light-beam-in-first-color filter is configured to allow a light-beam-in-first-color component of the first testing light beam to be transmitted to the light-beam-in-first-color receiver. The light-beam-in-first-color receiver is configured to convert the light-beam-in-first-color component into a first electric signal and output the first electric signal. The light-beam-in-second-color filter is configured to allow a light-beam-in-second-color component of the second testing light beam to be transmitted to the light-beam-in-second-color receiver. The light-beam-in-second-color receiver is configured to convert the light-beam-in-second-color component into a second electric signal and output the second electric signal. The light-beam-in-third-color filter is configured to allow a light-beam-in-third-color component of the third testing light beam to be transmitted to the light-beam-in-third-color receiver. The light-beam-in-third-color receiver is configured to convert the light-beam-in-third-color component into a third electric signal and output the third electric signal. The processor is configured to determine a color parameter of the light-beam-in-first-color component in the display light beam in accordance with the first electric signal from the light-beam-in-first-color receiver, determine a color parameter of the light-beam-in-second-color component in the display light beam in accordance with the second electric signal from the light-beam-in-second-color receiver, and determine a color parameter of the light-beam-in-third-color component in the display light beam in accordance with the third electric signal from the light-beam-in-third-color receiver.
In a possible embodiment of the present disclosure, the color parameter measurement device further includes a light-beam-in-first-color convergent lens arranged on an optical path between the light-beam-in-first-color receiver and the light-beam-in-first-color filter, a light-beam-in-second-color convergent lens arranged on an optical path between the light-beam-in-second-color receiver and the light-beam-in-second-color filter, and a light-beam-in-third-color convergent lens arranged on an optical path between the light-beam-in-third-color receiver and the light-beam-in-third-color filter.
In a possible embodiment of the present disclosure, the beam-splitting assembly is an optical fiber assembly.
In a possible embodiment of the present disclosure, the color parameter measurement device further includes a first collimating lens arranged on an optical path between the optical fiber assembly and the light-beam-in-first-color filter, a second collimating lens arranged on an optical path between the optical fiber assembly and the light-beam-in-second-color filter, and a third collimating lens arranged on an optical path between the optical fiber assembly and the light-beam-in-third-color filter.
In a possible embodiment of the present disclosure, the color parameter measurement device further includes a first doublet and a second doublet arranged on an optical path between the optical fiber assembly and the to-be-tested display panel and opposite to each other. A convex surface of the first doublet is arranged to face the to-be-tested display panel, and a convex surface of the second doublet is arranged to face the optical fiber assembly.
In a possible embodiment of the present disclosure, the beam-splitting assembly includes a beam splitter and a reflector, or a grating and the reflector, or a prism and the reflector.
In a possible embodiment of the present disclosure, the color parameter measurement device further includes a collimating lens assembly arranged on an optical path between the beam-splitting assembly and the to-be-tested display panel.
In a possible embodiment of the present disclosure, the color parameter measurement device further includes a third doublet and a fourth doublet arranged on an optical path between the collimating lens assembly and the to-be-tested display panel and opposite to each other. A convex surface of the third doublet is arranged to face the to-be-tested display panel, and a convex surface of the fourth doublet is arranged to face the collimating lens assembly.
In a possible embodiment of the present disclosure, the color parameter measurement device further includes a dark state receiver arranged in a plane same as the light-beam-in-first-color receiver, the light-beam-in-second-color receiver and the light-beam-in-third-color receiver, and configured to convert an ambient light beam into an ambient light electric signal and output the ambient light electric signal. The processor is further configured to determine a noise parameter of the ambient light beam in accordance with the ambient light electric signal from the dark state receiver.
In a possible embodiment of the present disclosure, the color parameter measurement device further includes a light-beam-in-fourth-color receiver. The beam-splitting assembly is further configured to split the display light beam from the to-be-tested display panel into a fourth testing light beam. The light-beam-in-fourth-color receiver is configured to convert an optical signal of the fourth testing light beam into a fourth electric signal and output the electric signal. The processor is further configured to determine a brightness value of the display light beam in accordance with the fourth electric signal from the light-beam-in-fourth-color receiver.
In a possible embodiment of the present disclosure, the color parameter measurement device further includes a glass plate arranged on an optical path between the light-beam-in-fourth-color receiver and the beam-splitting assembly.
In a possible embodiment of the present disclosure, the color parameter measurement device further includes a light-beam-in-fourth-color convergent lens arranged on an optical path between the light-beam-in-fourth-color receiver and the glass plate.
In a possible embodiment of the present disclosure, the beam-splitting assembly is an optical fiber assembly, and the color parameter measurement device further includes a fourth collimating lens arranged on an optical path between the optical fiber assembly and the glass plate.
In a possible embodiment of the present disclosure, wherein a first color, a second color and a third color are red, green and blue respectively.
In a possible embodiment of the present disclosure, a fourth color is white.
In another aspect, the present disclosure provides in some embodiments a color parameter measurement method using the above-mentioned color parameter measurement device, including steps of: splitting, by a beam-splitting assembly, a display light beam from a to-be-tested display panel into at least a first testing light beam, a second testing light beam and a third testing light beam; allowing, by a light-beam-in-first-color filter, a light-beam-in-first-color component of the first testing light beam to be transmitted to a light-beam-in-first-color receiver, and converting, by the light-beam-in-first-color receiver, the light-beam-in-first-color component into a first electric signal and outputting the first electric signal; allowing, by a light-beam-in-second-color filter, a light-beam-in-second-color component of the second testing light beam to be transmitted to a light-beam-in-second-color receiver, and converting, by the light-beam-in-second-color receiver, the light-beam-in-second-color component into a second electric signal and outputting the second electric signal; allowing, by a light-beam-in-third-color filter, a light-beam-in-third-color component of the third testing light beam to be transmitted to a light-beam-in-third-color receiver, and converting, by the light-beam-in-third-color receiver, the light-beam-in-third-color component into a third electric signal and outputting the third electric signal; and determining, by a processor, a color parameter of the light-beam-in-first-color component in the display light beam in accordance with the first electric signal from the light-beam-in-first-color receiver, determining a color parameter of the light-beam-in-second-color component in the display light beam in accordance with the second electric signal from the light-beam-in-second-color receiver, and determining a color parameter of the light-beam-in-third-color component in the display light beam in accordance with the third electric signal from the light-beam-in-third-color receiver.
In a possible embodiment of the present disclosure, the color parameter measurement method further includes: splitting, by the beam-splitting assembly, the display light beam from the to-be-tested display panel into a fourth testing light beam; converting, by a light-beam-in-fourth-color receiver, an optical signal of the fourth testing light beam into a fourth electric signal and outputting the electric signal; and determining, by the processor, a brightness value of the display light beam in accordance with the fourth electric signal from the light-beam-in-fourth-color receiver.
In a possible embodiment of the present disclosure, a first color, a second color, a third color and a fourth color are red (R), green (G), blue (B) and white (W) respectively.
The present disclosure will be described hereinafter in conjunction with the drawings and embodiments. Shapes and sizes of the members in the drawings are for illustrative purposes only, but shall not be used to reflect any actual scale.
The present disclosure provides in some embodiments a color parameter measurement device which, as shown in
The beam-splitting assembly 100 is configured to split a display light beam from a to-be-tested display panel A into at least a first testing light beam a1, a second testing light beam a2 and a third testing light beam a3.
The light-beam-in-first-color filter 210 is configured to allow a light-beam-in-first-color component R of the first testing light beam a1 to be transmitted to the light-beam-in-first-color receiver 310. The light-beam-in-first-color receiver 310 is configured to convert the light-beam-in-first-color component R into an electric signal and output the electric signal.
The light-beam-in-second-color filter 220 is configured to allow a light-beam-in-second-color component G of the second testing light beam a2 to be transmitted to the light-beam-in-second-color receiver 320. The light-beam-in-second-color receiver 320 is configured to convert the light-beam-in-second-color component G into an electric signal and output the electric signal.
The light-beam-in-third-color filter 230 is configured to allow a light-beam-in-third-color component B of the third testing light beam a3 to be transmitted to the light-beam-in-third-color receiver 330. The light-beam-in-third-color receiver 330 is configured to convert the light-beam-in-third-color component B into an electric signal and output the electric signal.
The processor 400 is configured to determine a color parameter of the light-beam-in-first-color component R in the display light beam in accordance with the electric signal from the light-beam-in-first-color receiver 310, determine a color parameter of the light-beam-in-second-color component G in the display light beam in accordance with the electric signal from the light-beam-in-second-color receiver 320, and determine a color parameter of the light-beam-in-third-color component B in the display light beam in accordance with the electric signal from the light-beam-in-third-color receiver 330.
For example, a first color is red R, a second color is green G and a third color is blue B.
The color parameter may include luminance Lv, color coordinates x and y. The relationship between R, G, B and Lv, x, y may be represented by the following equations: X=2.7689R+1.7517G+1.1302B;
Y=1.0000R+5.5907G+0.0601B
Z=0R+0.0565G+5.5943B
x=X/(X+Y+Z)
y=Y/(X+Y+Z)
Lv=Y
Wherein the R, G, B in the equations are proportional to the R, G, B components received by the processor 400.
According to the color parameter measurement device in the embodiments of the present disclosure, the display light beam from the to-be-tested display panel A is split by the beam-splitting assembly 100 into at least the testing light beams a1, a2 and a3 corresponding to the light-beam-in-first-color filter 210, the light-beam-in-second-color filter 220 and the light-beam-in-third-color filter 230 respectively. Next, the light-beam-in-first-color component R, the light-beam-in-second-color component G and the light-beam-in-third-color component B of the corresponding testing light beams are transmitted to the corresponding receivers 310, 320 and 330 through the corresponding filters. Then, the light-beam-in-first-color component R, the light-beam-in-second-color component G and the light-beam-in-third-color component B are converted into electric signals by the corresponding receivers (light radiation energy is converted into current intensity energy by using an optical-electrical converter), and then outputted to the processor 400 for color parameter analysis, so as to rapidly calculate color characteristics of the to-be-tested display panel. As compared with the color parameter measurement using a beam-splitting spectrometer in the related art, through the color parameter measurement device in the embodiments of the present disclosure, it is able to shorten a measurement time period (e.g., reduce the measurement time period from 1-2 S to less than 50 ms), thereby to improve the production line efficiency.
It should be appreciated that, in order to perform the color parameter analysis accurately, the light-beam-in-first-color filter 210, the light-beam-in-second-color filter 220 and the light-beam-in-third-color filter 230 conform to an ICE1931 standard.
In addition, in order to improve utilization of the testing light beams a1, a2 and a3, the beam-splitting assembly 100 may be further configured to split the display light beam into the testing light beams a1, a2 and a3 with different wavelengths corresponding to colors of the filters respectively.
During the implementation, in order to improve the photoelectric conversion efficiency of the receiver corresponding to each standard monochromatic light beam as well as computational efficiency of the color parameter, as shown in
To be specific, the light-beam-in-first-color convergent lens 510 may converge light energy of the light-beam-in-first-color component R from the light-beam-in-first-color filter 210 at a point on the light-beam-in-first-color receiver 310, so as to enable the light-beam-in-first-color receiver 310 to receive the light beam in an energy concentration manner, thereby to improve a response speed of the light-beam-in-first-color receiver 310. The light-beam-in-second-color convergent lens 520 may converge light energy of the light-beam-in-second-color component G from the light-beam-in-second-color filter 220 at a point on the light-beam-in-second-color receiver 320, so as to enable the light-beam-in-second-color receiver 320 to receive the light beam in an energy concentration manner, thereby to improve a response speed of the light-beam-in-second-color receiver 320. The light-beam-in-third-color convergent lens 530 may converge light energy of the light-beam-in-third-color component B from the light-beam-in-third-color filter 230 at a point on the light-beam-in-third-color receiver 330, so as to enable the light-beam-in-third-color receiver 330 to receive the light beam in an energy concentration manner, thereby to improve a response speed of the light-beam-in-third-color receiver 330. In addition, usually a convex of each convergent lens is arranged in such a manner as to face away from an object, i.e., face the corresponding filer.
During the implementation, as shown in
During the implementation, it is able for the optical fiber assembly 110 to easily split an incident light beam, i.e., the display light beam, into the testing light beams in a desired amount according to the practical need. However, it is impossible for the optical fiber assembly 110 to control an emergent direction of the light beam accurately. Based on this, as shown in
To be specific, the first collimating lens 610 may collimate the first testing light beam a1 from the optical fiber assembly 110 toward the light-beam-in-first-color filter 210, so as to reduce any interference light beam on the optical path. The second collimating lens 620 may collimate the second testing light beam a2 from the optical fiber assembly 110 toward the light-beam-in-second-color filter 220, so as to reduce any interference light beam on the optical path. The third collimating lens 630 may collimate the third testing light beam a3 from the optical fiber assembly 110 toward the light-beam-in-third-color filter 230, so as to reduce any interference light beam on the optical path. Usually, a convex of each collimating lens is arranged in such a manner as to face the object, i.e., face the corresponding filter.
During the implementation, in order to reduce the chromatic aberration during the color parameter measurement and prevent the interference light beam entering the optical fiber assembly 110 from interfering with the subsequent optical path, as shown in
During the implementation, as shown in
During the implementation, a direction of the incident light beam is strictly required by such optical element as the reflector 120. Based on this, as shown in
During the implementation, in order to reduce the chromatic aberration during the color parameter measurement and prevent the interference light beam entering the optical fiber assembly 110 from interfering with the subsequent optical path, as shown in
During the implementation, as shown in
During the implementation, as shown in
During the implementation, as shown in
During the implementation, as shown in
During the implementation, as shown in
Based on a same inventive concept, the present disclosure further provides in some embodiments a color parameter measurement method using the above-mentioned color parameter measurement device. A principle of the method is similar to that of the above-mentioned color parameter measurement device, so the implementation of the method may refer to that of the color parameter measurement device and thus will not be particularly defined herein.
To be specific, as shown in
During the implementation, the color parameter measurement method may further include: S501 of splitting, by the beam-splitting assembly, the display light beam from the to-be-tested display panel into a fourth testing light beam; S502 of converting, by the light-beam-in-fourth-color receiver, an optical signal of the fourth testing light beam into an electric signal and outputting the electric signal; and S503 of determining, by the processor, a brightness value of the display light beam in accordance with the electric signal from the light-beam-in-fourth-color receiver, and adjusting the color parameter in real time by the electric signal outputted from the light-beam-in-fourth-color receiver.
To be specific, S501 and S401 may be performed simultaneously, S402-S404 and S502 may be performed simultaneously, and S405 and S503 may be performed simultaneously.
According to the color parameter measurement device and the color parameter measurement method in the embodiments of the present disclosure, the display light beam from the to-be-tested display panel is split by the beam-splitting assembly into at least the testing light beams corresponding to the light-beam-in-first-color filter, the light-beam-in-second-color filter and the light-beam-in-third-color filter respectively. Next, the light-beam-in-first-color component, the light-beam-in-second-color component and the light-beam-in-third-color component of the corresponding testing light beams are transmitted to the corresponding receivers through the corresponding filters. Then, the light-beam-in-first-color component, the light-beam-in-second-color component and the light-beam-in-third-color component are converted into electric signals by the corresponding receivers, and then outputted to the processor for color parameter analysis, so as to rapidly calculate color characteristics of the to-be-tested display panel. As compared with the color parameter measurement using a beam-splitting spectrometer in the related art, through the color parameter measurement device in the embodiments of the present disclosure, it is able to shorten a measurement time period (e.g., reduce the measurement time period from 1-2 S to less than 50 ms), thereby to improve the production line efficiency.
In a possible embodiment of the present disclosure, a first color, a second color, a third color and a fourth color are red R, green G, blue B and white W respectively.
The above are merely the preferred embodiments of the present disclosure, but the present disclosure is not limited thereto. Obviously, a person skilled in the art may make further modifications and improvements without departing from the spirit of the present disclosure, and these modifications and improvements shall also fall within the scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201710756440.3 | Aug 2017 | CN | national |
