CN108254159A - A kind of white balance detection device of laser display system - Google Patents
A kind of white balance detection device of laser display system Download PDFInfo
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- CN108254159A CN108254159A CN201810122169.2A CN201810122169A CN108254159A CN 108254159 A CN108254159 A CN 108254159A CN 201810122169 A CN201810122169 A CN 201810122169A CN 108254159 A CN108254159 A CN 108254159A
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Abstract
This application discloses a kind of white balance detection device of laser display system, including Fresnel fly's-eye lens and the photosensitive sensor being sequentially arranged in light path；Wherein, Fresnel fly's-eye lens is used for incident light beam to be detected into line convergence and shimming；Photosensitive sensor is used to receive and detect the light beam to be detected after concentrated and shimming, and generate detection signal, to realize white balance detection according to the rgb value of detection signal acquisition light beam to be detected.The application efficiently realizes the convergence for treating detection light beam and shimming using Fresnel fly's-eye lens, avoid the use of light siphunculus etc. in the prior art, so as to effectively simplify the structure of white balance detection device, and white balance detection reduces the installation requirement of photosensitive sensor, in order to the installation and debugging of component, user experience is improved.Disclosed herein as well is a kind of laser display system, equally with above-mentioned advantageous effect.
Description
Technical Field
The application relates to the technical field of laser display, in particular to a laser display system and a white balance detection device thereof.
Background
In the field of colorimetry, white is actually a visual response formed by light rays reflected to human eyes due to the fact that the proportion of red (R), green (G) and blue (B) is the same and the light rays have certain brightness; white balance is an indicator describing the accuracy with which R, G, B three primary colors in an image are mixed to produce white.
In order to avoid the image showing blue or red light color in different color temperature environments, the laser display system generally needs to adjust the white balance through detection. The prior art white balance detecting device is generally complicated in structure because a light converging element and a shimming element are arranged for the photosensitive sensor to accurately receive the R, G, B component uniform light to be detected after being fully mixed. The adopted shimming elements, such as common light through tubes or light homogenizing rods, are high in cost and inconvenient to install and debug, and provide high requirements for the spatial layout of components in the laser display system.
Therefore, what kind of white balance detection device with simple structure and convenient installation and debugging is adopted is an important technical problem to be solved by the technical personnel in the field.
Disclosure of Invention
An object of the present application is to provide a laser display system and a white balance detecting device thereof with a simple structure, so as to facilitate installation and debugging.
In order to solve the above technical problem, the present application provides a white balance detection device for a laser display system, including a fresnel fly-eye lens and a photosensitive sensor sequentially disposed in a light path; wherein,
the Fresnel fly-eye lens is used for converging and shimming incident light beams to be detected;
the photosensitive sensor is used for receiving and detecting the converged and shimmed light beam to be detected and generating a detection signal so as to obtain an RGB value of the light beam to be detected according to the detection signal to realize white balance detection.
Optionally, the number of the fresnel fly-eye lens and the number of the photosensitive sensors are both one; the photosensitive sensor is a color sensor.
Optionally, the white balance detection device includes three fresnel fly-eye lenses and three photosensitive sensors; the device also comprises a red light filter, a green light filter, a blue light filter and three optical glass sheets; wherein,
the first optical glass sheet is used for reflecting the light beam to be detected to the red light filter sheet for filtering so as to retain red light; the red light enters the first photosensitive sensor after being converged and shimmed by the first Fresnel fly-eye lens so as to generate a first detection signal;
the second optical glass sheet is used for reflecting the light beam to be detected to the green light filter sheet for filtering so as to retain green light; the green light enters the second photosensitive sensor after being converged and shimmed by the second Fresnel fly-eye lens so as to generate a second detection signal;
the third optical glass sheet is used for reflecting the light beam to be detected to the blue light filter sheet for filtering so as to retain blue light; and the blue light enters the third photosensitive sensor after being converged and shimmed by the third Fresnel fly-eye lens so as to generate a third detection signal.
Optionally, the first photosensor, the second photosensor, and the third photosensor are all photodiodes.
Optionally, the system further comprises a spectroscope arranged in a display light path of the laser display system; the spectroscope is used for reflecting the light beam in the display light path to the first optical glass sheet, the second optical glass sheet and the third optical glass sheet as the light beam to be detected.
Optionally, the mirror surface of the spectroscope is plated with an antireflection film.
Optionally, the first optical glass sheet, the second optical glass sheet and the third optical glass sheet are sequentially arranged in a main light path of the light beam to be detected; the transmission light of the first optical glass sheet is incident to the second optical glass sheet, and the transmission light of the second optical glass sheet is incident to the third optical glass sheet.
Optionally, the beam splitter is in a position relationship of 45 ° with the display light path; the first optical glass sheet, the second optical glass sheet and the third optical glass sheet are all in a position relation of 45 degrees with the main light path of the light beam to be detected.
The application also provides a laser display system, which comprises the white balance detection device of any laser display system.
The white balance detection device of the laser display system comprises a Fresnel fly-eye lens and a photosensitive sensor which are sequentially arranged in a light path; the Fresnel fly-eye lens is used for converging and shimming an incident light beam to be detected; the photosensitive sensor is used for receiving and detecting the converged and shimmed light beam to be detected and generating a detection signal so as to obtain an RGB value of the light beam to be detected according to the detection signal to realize white balance detection.
It is thus clear that, compare in prior art, among the laser display system's that this application provided white balance detection device, utilize fresnel compound eye lens to realize the convergence and the shimming to waiting to detect the light beam high-efficiently, avoided the use of light pipe etc. among the prior art to can simplify white balance detection device's structure effectively, and can make white balance detect and require to reduce photosensitive sensor's installation, so that the installation and the debugging of components and parts, improve user experience. The laser display system that this application provided includes above-mentioned white balance detection device, has above-mentioned beneficial effect equally.
Drawings
In order to more clearly illustrate the technical solutions in the prior art and the embodiments of the present application, the drawings that are needed to be used in the description of the prior art and the embodiments of the present application will be briefly described below. Of course, the following description of the drawings related to the embodiments of the present application is only a part of the embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the provided drawings without any creative effort, and the obtained other drawings also belong to the protection scope of the present application.
Fig. 1 is a block diagram of a white balance detection apparatus of a laser display system according to an embodiment of the present disclosure;
fig. 2 is a light path diagram of a white balance detection system of a laser display system according to an embodiment of the present disclosure;
fig. 3 is an optical path diagram of a white balance detection system of another laser display system according to an embodiment of the present application.
Detailed Description
The core of the application lies in providing a laser display system with simple structure and a white balance detection device thereof, so as to be convenient for installation and debugging.
In order to more clearly and completely describe the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a block diagram of a white balance detection apparatus of a laser display system according to an embodiment of the present disclosure, which mainly includes a fresnel fly-eye lens 1 and a photosensor 2 sequentially disposed in a light path; wherein,
the Fresnel fly-eye lens 1 is used for converging and shimming incident light beams to be detected;
the photosensitive sensor 2 is used for receiving and detecting the converged and shimmed light beam to be detected and generating a detection signal so as to obtain the RGB value of the light beam to be detected according to the detection signal to realize white balance detection.
Laser display generally uses red, green, and blue three-primary-color lasers as light sources, and displays the three-primary-color lasers after mixing the three-primary-color lasers. The mixing ratio of the three primary colors is different, and the saturation, color temperature, etc. of the obtained picture are different, so it is necessary to detect the three primary colors respectively, so as to adjust the light source according to the detection result of the three primary colors and improve the picture quality, and the process is the white balance detection.
The optical element who uses among the white balance detection device that this application provided is fresnel fly-eye lens, utilizes fresnel fly-eye lens, can also carry out dodging when carrying out light convergence to the guarantee detects light in the 2 detection range of photosensitive sensor all is even. Therefore, on one hand, the accuracy and the reliability of the detected RGB values can be guaranteed; on the other hand, the mounting position of the photosensitive sensor 2 can be freely selected in the detection range, and the device is greatly convenient to mount and debug.
Specifically, the fresnel fly-eye lens is a compound lens with two inconsistent optical characteristics, one surface of the fresnel fly-eye lens is a fresnel lens, and the fresnel fly-eye lens is equivalent to an efficient convergent lens; and the other side is a fly-eye lens.
The mirror surface of the Fresnel lens is inscribed with concentric circles from small to large, and optical materials are removed as much as possible, and the curvature of the surface is kept, so that the thickness of the mirror surface is thinner than that of a common convex lens, but the effect is the same. Its texture is designed according to the requirements of light interference, relative sensitivity and receiving angle. When a common convex lens is used, the corners are darkened and blurred, because the refraction of light only occurs at the interface of the medium, the convex lens is thick, and the light is attenuated by the straight-line light propagating portion in the glass. The Fresnel lens removes the straight-line transmission part and only keeps the curved surface which is refracted, thereby saving a large amount of materials and achieving the same light-gathering effect. And fly-eye lenses are double-row lens arrays formed by a series of small lens combinations. The double-row compound eye lens array can be used for realizing uniform processing of light beams.
Therefore, the Fresnel fly-eye lens can realize the convergence of light beams by utilizing the Fresnel lens surface, and can also carry out light uniformizing treatment by utilizing the fly-eye lens surface, thereby effectively simplifying the structure of the white balance detection device and facilitating the installation and debugging.
Therefore, in the white balance detection device of the laser display system provided by the embodiment of the application, the Fresnel fly-eye lens 1 is used for efficiently converging and shimming the light beam to be detected, so that the structure of the white balance detection device can be effectively simplified, the installation requirement of the white balance detection on the photosensitive sensor 2 is reduced, the installation and debugging of components are facilitated, and the user experience is improved.
The white balance detection device of the laser display system provided by the application is based on the embodiment as follows:
referring to fig. 2, fig. 2 is a light path diagram of a white balance detection apparatus of a laser display system according to an embodiment of the present disclosure; as a preferred embodiment, the number of the fresnel fly-eye lens 1 and the photosensor 2 is one; the light sensitive sensor 2 is a color sensor.
Specifically, as shown in fig. 2, the light beam to be detected is converged and shimmed by the fresnel fly-eye lens 1, and then is uniformly distributed in a limited detectable area. In the region of the detectable area, a color sensor is arranged as the light-sensitive sensor 2.
The color sensor, also called as a color sensor, is internally integrated with an RGB detection module, can detect and analyze RGB component values and intensity of reflected light of a target so as to verify correct components and assembly and accurately control the color of a finished product, and is widely applied to the field of production detection. In this application, can utilize color sensor to acquire the RGB value of waiting to detect the light to realize white balance and detect. It can be seen that the white balance detecting apparatus shown in fig. 2 has a very simple structure. In addition, because the light transmitted by the fresnel fly-eye lens 1 is effectively shimmed, the light received by the color sensor at any position in the detectable region range is basically the same, so that the color sensor can be installed at any position in the detectable region range, that is, the installation requirement on the photosensitive sensor 2 is reduced, and the installation and debugging of the white balance detection device are simpler and more convenient.
Referring to fig. 3, fig. 3 is a light path diagram of a white balance detection apparatus of another laser display system according to an embodiment of the present disclosure; as a preferred embodiment, the white balance detection means includes three fresnel fly-eye lenses and three photosensitive sensors; the LED backlight module also comprises a red light filter 4, a green light filter 5, a blue light filter 6 and three optical glass sheets; wherein,
the first optical glass sheet 31 is used for reflecting the light beam to be detected to the red light filter 4 for filtering so as to retain red light; the red light enters the first photosensitive sensor 21 after being converged and shimmed by the first Fresnel fly-eye lens 11 so as to generate a first detection signal;
the second optical glass sheet 32 is used for reflecting the light beam to be detected to the green light filter 5 for filtering so as to retain green light; the green light enters the second photosensitive sensor 22 after being converged and shimmed by the second fresnel fly-eye lens 12 so as to generate a second detection signal;
the third optical glass sheet 33 is used for reflecting the light beam to be detected to the blue light filter 6 for filtering so as to retain the blue light; the blue light is converged and shimmed by the third fresnel fly-eye lens 13 and then enters the third photosensor 23 to generate a third detection signal.
As shown in fig. 3, the white balance detection device provided in the embodiment of the present application respectively constitutes a red light detection module, a green light detection module, and a blue light detection module through different components, so as to respectively detect red light, green light, and blue light.
Because the tricolor light needs to be detected respectively, each detection module needs reasonable light path design so as not to influence the normal detection of the other two detection modules. Specifically, in the white balance detection device shown in fig. 3, taking the red light detection module as an example, it includes a first optical glass sheet 31, a first fresnel fly-eye lens 11, a red light filter 4 and a first photosensor 21 in sequence along the light path. The first optical glass sheet 31 reflects light to be detected to the red light filter 4, and the red light filter 4 filters light of other bands, allowing only red light to pass through. After filtering, only red light is retained, and the first fresnel fly-eye lens 11 converges the retained red light to the first photosensor 21 to generate a first detection signal of red light.
The light path design principles of the green light detection module and the blue light detection module are similar to those of the red light detection module, and are not described herein again.
It should be noted that, in order to avoid the mutual influence of the detection modules, each detection module is provided with an optical glass sheet on the main optical path of the light to be detected, so that the reflected light of the optical glass sheet is used for detecting the module, and the transmitted light of the optical glass sheet can be continuously used for detecting by the rear detection module.
As a preferred embodiment, the first photosensor 21, the second photosensor 22 and the third photosensor 23 are all photodiodes.
In particular, after filtering processing of the corresponding filter segment, each photosensor 2 can be selected here as a photodiode commonly used in the art to save costs.
As a preferred embodiment, the system further comprises a spectroscope 7 arranged in a display light path of the laser display system; the beam splitter 7 is used for reflecting the light beam in the display light path to the first optical glass sheet 31, the second optical glass sheet 32 and the third optical glass sheet 33 as a light beam to be detected.
Generally, in a laser display system, in order to extract part of display light as light to be detected for white balance detection, a spectroscope 7 may be provided into a display optical path of the laser display system so as to take reflected light of the spectroscope 7 as light to be detected.
In a preferred embodiment, the mirror surface of the spectroscope 7 is coated with an antireflection film.
Specifically, since the light inevitably generates loss when passing through the beam splitter 7, the white balance detection apparatus provided in the embodiment of the present application may plate an antireflection film on the mirror surface of the beam splitter 7, so as to ensure that the loss generated by the beam splitter 7 is minimized, and the influence of the loss on the output power of the system is also minimized.
As a preferred embodiment, the first optical glass sheet 31, the second optical glass sheet 32 and the third optical glass sheet 33 are sequentially arranged in the main light path of the light beam to be detected; the transmitted light of the first optical glass sheet 31 is incident on the second optical glass sheet 32, and the transmitted light of the second optical glass sheet 32 is incident on the third optical glass sheet 33.
Specifically, as shown in fig. 3, three detection modules may be sequentially installed and disposed. In the white balance detecting device shown in fig. 3, a first optical glass sheet 31, a second optical glass sheet 32, and a third optical glass sheet 33 are provided in this order along the main optical path of light to be detected. Because the incident light of the optical glass sheet positioned behind the light path is the transmitted light of the adjacent optical glass sheet in front of the optical glass sheet, and the optical glass sheet has certain reflectivity and refractive index, the arrangement position of each optical glass sheet influences the total energy of the light entering each filter sheet. Therefore, the skilled person should consider the respective detection signals in combination according to the mounting position of the optical glass sheet of each module. Of course, the position sequence of each optical glass sheet is not limited in the present application, and those skilled in the art can set the position sequence according to the actual application.
As a preferred embodiment, the spectroscope 7 is in a position relation of 45 ° with the display light path; the first optical glass sheet 31, the second optical glass sheet 32 and the third optical glass sheet 33 are all in a position relation of 45 degrees with the main light path of the light beam to be detected.
Specifically, as shown in the optical path diagram of fig. 3, the beam splitter 7 is disposed at an angular position that makes an angle of 45 ° with respect to the display optical path, so that the reflected light of the beam splitter 7 exits in a direction perpendicular to the display optical path. Accordingly, each optical glass sheet located on the optical path of the reflected light from the spectroscope 7 may also be set at an angular position that makes an angle of 45 ° with the main optical path of the light to be detected, so that the reflected light from each optical glass sheet exits in a direction parallel to the display optical path, to facilitate the mounting of the optical devices in each detection module.
Of course, a person skilled in the art may also adjust the installation angle and the position of the device such as the beam splitter 7 according to the actual application scenario, which is not limited in the embodiment of the present application.
The present application further provides a laser display system, including the white balance detection apparatus of the laser display system as described in any of the above embodiments.
The specific implementation of the laser display system provided in the present application and the white balance detection apparatus of the laser display system described above may be referred to correspondingly, and will not be described herein again.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
It is also noted that, in the present specification, terms such as "first" and "second" are used
The relational terms of MP1800604 are used solely to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The technical solutions provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are merely set forth to aid in understanding the core concepts of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (9)
1. A white balance detection device of a laser display system is characterized by comprising a Fresnel fly-eye lens and a photosensitive sensor which are sequentially arranged in a light path; wherein,
the Fresnel fly-eye lens is used for converging and shimming incident light beams to be detected;
the photosensitive sensor is used for receiving and detecting the converged and shimmed light beam to be detected and generating a detection signal so as to obtain an RGB value of the light beam to be detected according to the detection signal to realize white balance detection.
2. The white balance detecting device according to claim 1, wherein the number of the fresnel fly-eye lens and the number of the photosensor are both one; the photosensitive sensor is a color sensor.
3. The white balance detection device according to claim 1, characterized in that the white balance detection device includes three fresnel fly-eye lenses and three photosensitive sensors; the device also comprises a red light filter, a green light filter, a blue light filter and three optical glass sheets; wherein,
the first optical glass sheet is used for reflecting the light beam to be detected to the red light filter sheet for filtering so as to retain red light; the red light enters the first photosensitive sensor after being converged and shimmed by the first Fresnel fly-eye lens so as to generate a first detection signal;
the second optical glass sheet is used for reflecting the light beam to be detected to the green light filter sheet for filtering so as to retain green light; the green light enters the second photosensitive sensor after being converged and shimmed by the second Fresnel fly-eye lens so as to generate a second detection signal;
the third optical glass sheet is used for reflecting the light beam to be detected to the blue light filter sheet for filtering so as to retain blue light; and the blue light enters the third photosensitive sensor after being converged and shimmed by the third Fresnel fly-eye lens so as to generate a third detection signal.
4. The white balance detecting device according to claim 3, wherein the first photosensor, the second photosensor, and the third photosensor are all photodiodes.
5. The white balance detecting device according to claim 3, further comprising a spectroscope provided in a display optical path of the laser display system; the spectroscope is used for reflecting the light beam in the display light path to the first optical glass sheet, the second optical glass sheet and the third optical glass sheet as the light beam to be detected.
6. The white balance detecting device according to claim 5, wherein a mirror surface of the spectroscope is coated with an antireflection film.
7. The white balance detecting device according to claim 5, wherein the first optical glass sheet, the second optical glass sheet and the third optical glass sheet are sequentially disposed in a main optical path of the light beam to be detected; the transmission light of the first optical glass sheet is incident to the second optical glass sheet, and the transmission light of the second optical glass sheet is incident to the third optical glass sheet.
8. The white balance detecting device according to claim 7, wherein said beam splitter is in a positional relationship of 45 ° to said display optical path; the first optical glass sheet, the second optical glass sheet and the third optical glass sheet are all in a position relation of 45 degrees with the main light path of the light beam to be detected.
9. A laser display system comprising the white balance detection device of the laser display system according to any one of claims 1 to 8.
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| CN201810122169.2A CN108254159A (en) | 2018-02-07 | 2018-02-07 | A kind of white balance detection device of laser display system |
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Address after: Room 401, room 402, building 1, Zone C, industrial square, science and Technology City, 588 Wutaishan Road, high tech Zone, Suzhou City, Jiangsu Province, 215000 Applicant after: Jiangsu radium Technology Co.,Ltd. Address before: 100176 Room 301, 3rd floor, building 28, yard 18, Kechuang 13th Street, Beijing Economic and Technological Development Zone, Daxing District, Beijing Applicant before: BEIJING LITRONICS OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |
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