CN112255839A - Liquid crystal display method for night vision mirror simulation training - Google Patents
Liquid crystal display method for night vision mirror simulation training Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
Abstract
A liquid crystal display method for night vision mirror simulation training is characterized in that according to a transmittance curve of a liquid crystal screen, a color filter which is cut off after 750nm is added to a common white LED light source, a special backlight light source which is matched with a spectrum of a starry sky environment at night is added at one path, and the spectrum and the power of the special backlight light source are controlled to ensure that the total energy of a radiation spectrum of a display relative to the night vision mirror is close to the total energy of the radiation spectrum of the actual night vision mirror relative to the night vision mirror, so that the display effect of simulating a real night vision is realized; the effect of observing the liquid crystal display by visual observation is similar to that of observing the natural night sky, and simultaneously, the spectrum of the liquid crystal display observed by the night vision goggles is similar to that of the natural night sky observed by the night vision goggles. The invention can simulate the environment under night sky lighting conditions in different forms by the design control of the simulation image, thereby improving the training effect.
Description
Technical Field
The invention is applied to the field of the analog display used for night vision mirror operation and use training. The liquid crystal display method is particularly suitable for night environment simulation display of low-light night vision goggle operation training, and specifically relates to a liquid crystal display method for night vision goggle simulation training.
Background
The night vision goggles can provide direct visual night vision images for users in an environment without illumination at night, and are widely applied to activities such as night hunting, security protection and the like. In order to adapt to the change of vision and behavior habits caused by wearing the night vision goggles, the operation and the use of the night vision goggles are familiar, and related personnel must be subjected to comprehensive training under various use environments. This patent describes a particular liquid crystal display for such simulated training.
The night vision goggles mainly comprise optical lenses such as an objective lens and an ocular lens, core devices and an image intensifier. The image intensifier includes a photocathode, an electron multiplying element microchannel plate (MCP), and a phosphor screen. The image intensifier can intensify weak light of a specific wavelength range by thousands to hundreds of thousands times.
The night vision goggles imaging principle is as follows: moonlight and starlight at night irradiate a target object to generate weak reflected light; the objective lens collects weak light reflected by the target, and focuses light energy of the target reflected light on a photocathode target surface of the image intensifier; the photocathode converts photons into electrons to be output, and the microchannel plate of the image intensifier multiplies and amplifies the number of the electrons output by the cathode and bombards a fluorescent screen of the image intensifier; the fluorescent screen converts electrons into optical signals and reproduces the target image received by the target surface of the photocathode again; the eye lens restores and images the target image reproduced on the fluorescent screen into human eyes. The human eye can see a sharp, luminance-enhanced, low-illumination target image through the eyepiece.
In practical night vision goggles applications, some applications are to eliminate the influence of ambient light around the person using the night vision goggles, and the night vision goggles objective lens is equipped with a color filter, such as the color filter requirement of the night vision goggles in the MIL-STD-3009 under several specific application environments. The night vision goggles with the added color filter have amplified response only to a certain range of spectrum, and the relative response characteristic of A, B, C type night vision goggles described in the MIL-STD-3009 standard is shown in figure 1. In these application environments, for example, class B goggles are used, as compared with the actual night starry sky environment, human eyes are sensitive to the spectrum of 380nm to 780nm (actually, the sensitivity coefficient of light rays of 380nm to 410nm and 750nm to 780nm is low and can be almost ignored), class B goggles are sensitive to the spectrum of 650nm to 930nm and are amplified and enhanced, and the goggles only display monochromatic fluorescent images (the colors of the images displayed by the goggles are generally green, white or other monochromatic colors according to the materials of the fluorescent powder of the image intensifier fluorescent screen), so that the scene/visual perception brought by the class B goggles is very different from the visual perception under naked eyes and night goggles except the brightness perception.
When the night vision goggles are used for simulation training, the simulated actual outdoor night sky environment needs to be observed by naked eyes visually and the night vision goggles are similar to the actual effect. However, the common display backlight generally uses a white light LED, and the spectrum of the white light LED has relatively less energy in the 650-720 nm portion of the liquid crystal display which can be modulated with high contrast, which is not in accordance with the starry sky environment at night, resulting in insufficient radiance observed by night vision goggles. Meanwhile, the spectrum energy of the backlight of the common display is not completely cut off after the liquid crystal display is not fully modulated at 750nm, and because the transmittance of the liquid crystal screen is greatly increased after the liquid crystal display is 750nm, the leaked spectrum of the display does not feel human eyes, but the contrast of an image is rapidly reduced when the display is observed under a night vision mirror, the background color of the image is brighter, and the definition of a simulated displayed scene is greatly reduced. Therefore, the special display of the present invention needs to filter the backlight spectrum with wavelength larger than 750 nm.
The display is required to simulate the real night environment when the night vision goggles are used for simulation training, and the requirement that the effect observed when human eyes see naked eyes and wear the night vision goggles is identical to the effect similar to the real night environment is met. But the general liquid crystal display cannot satisfy such a requirement. Different simulated night environments are compared with real night environments, naked eye visual effects obtained by training personnel are similar, and display pictures observed by using night vision goggles also need to meet the requirement of similarity. That is, the ordinary liquid crystal display can not meet the environment under the simulated starry sky required by night vision goggles training.
In order to solve the problem that a common liquid crystal display cannot meet the use requirement of night vision goggle training, the invention provides a technical scheme of a display for simulating a real night sky spectrum. The light source with special spectrum is matched with the spectral characteristics of the liquid crystal screen for design, the real night sky spectrum is simulated from the two aspects of naked eye visual observation and night vision mirror observation, and the visual effect of naked eye visual observation and the visual effect that a display picture and brightness observed by using the night vision mirror are close to those observed in the natural actual night sky are ensured.
In order to achieve the visual effect, the key is to simulate the light spectrum distribution under the starry sky, and theoretically, the simulation display is the most ideal if the simulation display can completely simulate the light spectrum distribution, the brightness condition and the gray scale level of the real field environment. However, the display completely simulating the starry sky light environment is very difficult to realize, and is mainly embodied in that the starry sky spectrum light source is very expensive, and no display capable of realizing multi-gray level image display of full starry sky spectrum distribution exists.
The light sensitivity range of human eyes is 380 nm-780 nm, the light sensitivity range of night vision goggles is above 450 nm-850 nm, and the light sensitivity range of image intensifiers (image tubes) adopting third-generation photoelectric cathode materials is 450 nm-930 nm. The night star light environment spectrum comprises visible light, near infrared light and infrared spectrum with longer wavelength in the range of 380 nm-1000 nm. The night vision goggles can see the spectrum which can not be seen by human eyes, and the night vision goggles can have the enhancement multiplying power of more than 15000 times to weak light at night.
The spectrum modulation effect of the liquid crystal display screen sold in the market at present is invalid after 750nm, the high-contrast gray scale modulation display of the spectrum above 750nm is difficult to realize, if light rays of the spectrum after 750nm exist, the light rays can directly penetrate through the liquid crystal display screen to enter the night vision goggles, the image contrast in the night vision goggles is very low, the display is fuzzy, and the night vision observation effect is influenced. Therefore, the LCD needs to filter the backlight spectrum with wavelength larger than 750nm
The spectral response of the class A night vision goggles after 660nm is more than 90%, the spectral response below 620nm is less than 10%, the spectral response of the class B night vision goggles after 660nm is more than 90%, the spectral response below 645nm is less than 10%, in order to give consideration to the image restoration characteristics of a liquid crystal screen to different spectrum light and the response characteristics of the night vision goggles to different spectrum light, a starry sky environment is simulated, 680nm-720nm deep red segment narrow-band energy is added on the basis of a common white LED light source, and a compensation spectrum for enhancing the observation effect of the night vision goggles is used as a light source for the backlight of the liquid crystal display. And simultaneously, the strict cut-off of the spectral energy after 750nm is ensured, so that the influence on the image contrast in the night vision goggles caused by the loss of the modulation effect of the liquid crystal display screen on the light after 750nm is prevented. The added deep red segment is preferably a narrow band light source, such as a laser source in the wavelength range of 680nm-720 nm. Disclosure of Invention
The invention aims to provide a liquid crystal display method for night vision goggle simulation training, aiming at solving the problem that the existing liquid crystal display can not meet the real night sky environment in night vision goggle training so as to influence the training use.
The technical scheme of the invention is as follows:
a liquid crystal display method for night vision mirror simulation training is characterized in that according to a transmittance curve of a liquid crystal screen, a color filter which is cut off after 750nm is added to a common white LED light source, a special backlight light source which is matched with a spectrum of a starry sky environment at night is added at one path, and the spectrum and the power of the special backlight light source are controlled to ensure that the total energy of a radiation spectrum of a display relative to the night vision mirror is close to the total energy of the radiation spectrum of the actual night vision mirror relative to the night vision mirror, so that the display effect of simulating a real night vision is realized; the effect of observing the liquid crystal display by visual observation is similar to that of observing the natural night sky, and simultaneously, the spectrum of the liquid crystal display observed by the night vision goggles is similar to that of the natural night sky observed by the night vision goggles.
The special backlight light source is a deep red narrow-band light source which divides a light source into two paths, wherein one path is a common white LED light source and a color filter which is cut off after 750nm, and the other path is a deep red narrow-band light source which simulates the spectral characteristics of a starry sky environment at night and enhances the observation effect of night vision goggles; the deep red narrow-band light source for enhancing the observation effect of the night vision goggles is a laser light source or a light source with similar spectral characteristics; the spectrum of the deep red narrow-band light source needs to be strictly controlled at 680nm-720 nm; the spectrum of the light source is cut off strictly after 750 nm.
The liquid crystal screen backlight system of the deep red segment narrow-band laser light source adopts direct type backlight or side backlight.
The backlight light source spectrum and control system is realized by adjusting the spectrum and the power of the deep red section narrow-band laser light source.
The transmittance difference of the liquid crystal panels of different liquid crystal screens is eliminated by controlling the spectral distribution and cut-off wavelength of the special light source, and a better night vision goggle observation effect can be achieved.
The night vision goggles are low-light night vision goggles or night vision imaging systems; the night vision goggles are common night vision goggles without color filters, and can also be B-type, A-type or C-type night vision goggles meeting the MIL-STD-3009 standard.
The liquid crystal display designed according to the invention can simulate the environment under night sky illumination conditions in different forms.
The invention has the beneficial effects that:
the real night sky environment obtained by design and calculation has near infrared spectrum, the radiance of the night vision goggles is higher, the visual observation brightness is lower, and the visual effect similar to that in the real night sky environment can be achieved by adopting a special liquid crystal display with two backlight paths to realize visual observation and night vision goggle observation.
The invention designs the liquid crystal screen by matching the light source with special spectrum, ensures that the real night sky can be simulated from the two aspects of visual observation and night-vision mirror observation, and ensures that the visual observation brightness and the radiance and brightness observed by the night-vision mirror are close to the effect of the actual night sky observation. And when the output spectrum of the display is controlled to be cut off after the output spectrum meets 750nm, the total radiation brightness in the spectrum sensitive area of the night vision goggles fully represents the spectral radiation energy in the range of 750-930 of the real night sky environment, the brightness and contrast of night vision observation are improved, and the visual effect is ideal. The invention has simple design and is particularly suitable for the night vision goggle simulation training display. Because the relative intensity of the spectral capability of the dark red wave band increased by controlling the backlight of the liquid crystal display by the display control image software can be improved, the special display can meet the training environment simulation of night vision goggles of different application types.
Drawings
Fig. 1 is a diagram of the relative response characteristics of an A, B, C triple-mode night vision imaging system (night vision goggles) of the present invention.
FIG. 2 is a spectrum of the invention in the night sky (wavelength in nm on the abscissa, energy in units of area 10 on the ordinate)- 4W/m2）。
FIG. 3 is a schematic diagram of the spectral distribution of an LED backlight LCD according to the present invention.
FIG. 4 is a schematic diagram of a laser backlight LCD according to the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 2, 3 and 4.
A liquid crystal display method for night vision mirror simulation training is characterized in that according to a transmittance curve of a liquid crystal screen, a color filter which is cut off after 750nm is added to a common white LED light source, a special backlight light source which is matched with a spectrum of a starry sky environment at night is added at one path, and the spectrum and the power of the special backlight light source are controlled to ensure that the total energy of a radiation spectrum of a display relative to the night vision mirror is close to the total energy of the radiation spectrum of the actual night vision mirror relative to the night vision mirror, so that the display effect of simulating real night vision is realized; the effect of observing the liquid crystal display by visual observation is similar to that of observing the natural night sky, and simultaneously, the spectrum of the liquid crystal display observed by the night vision goggles is similar to that of the natural night sky observed by the night vision goggles. The special backlight light source is a deep red narrow-band light source which divides a light source into two paths, wherein one path is a common white LED light source and a color filter which is cut off after 750nm, and the other path is a deep red narrow-band light source which simulates the spectral characteristics of a starry sky environment at night and enhances the observation effect of night vision goggles; the deep red narrow-band light source for enhancing the observation effect of the night vision goggles is a laser light source or a light source with similar spectral characteristics; the spectrum of the deep red narrow-band light source needs to be strictly controlled at 680nm-720 nm; the spectrum of the light source is cut off strictly after 750 nm.
According to the spectral distribution of the night sky, it can be seen from fig. 2 that there are differences in the spectra in the environment of moonlight, starlight, and 1/4 moonlight + starlight (three curves from top to bottom in fig. 2), but the spectra are continuous and have no mutation, and the spectral range of 700-950 nm is relatively smooth. The image enhancement effect of the spectrum of the natural starry sky on the night vision goggles can be obtained by calculation (calculating the response radiance value of the night vision goggles), and the same radiance can be realized by using a common white LED (light with wavelength spectrum larger than 750nm needs to be filtered) of a liquid crystal display and a laser light source in the wavelength range of 680nm-720nm of a deep red section in a simulated mode, wherein the specific method comprises the following steps:
firstly, obtaining starlight spectrum data and spectrum reflection coefficients of different targets under different weather environments through testing; testing the spectral transmittance distribution of the liquid crystal screen and the output spectrum of different display colors of the liquid crystal display, wherein the calculation process is as follows:
human eyes observe relevant factors (integrated within the range of 380-780) of the real night sky environment: a spectral reflectance visibility function of the night sky spectral target;
the night vision goggles are used for observing the response effect of the real night sky environment: a spectral reflection coefficient night vision mirror response curve (integrated within the range of 450-930 nm) of the night sky spectral target;
human eyes observe the night sky environment related factors simulated by the display: a display luminance distribution spectrum visibility function; (integrated in the range of 380 to 780 nm).
Display spectra were observed through night vision goggles: the display spectrum night vision goggles response curve visual function (integrated in the range of 450-930).
The scene under the night sky is observed through the night vision goggles, although the visual brightness is low, the irradiance ratio is high, because under the real night sky, the wavelength range with sensitive night vision response is 650 plus 930nm, the spectral energy is high, but the energy of the spectrum of the common LED backlight liquid crystal display is low after 650nm, the brightness value observed through the night vision goggles is insufficient, and because the action of the liquid crystal light valve is basically lost after 750nm, part of the spectrum directly penetrates through the liquid crystal screen to enter the night vision goggles, the background color is bright when the night vision goggles are observed, the image contrast is seriously reduced when the night vision goggles are observed, the displayed image is not clear enough, and the effect is not ideal. The technical scheme adopted by the invention is as follows: aiming at the characteristics of night vision goggle training and observation, a narrow-band spectral light source is adopted, the spectral range is controlled in the spectral range of the high-contrast modulation of the liquid crystal display screen which is sensitive in response of the night vision goggle, the high image contrast of the environment simulated by the night vision goggle training is ensured, the total radiance of the relative night vision goggle is ensured to be close to the total radiance of the actual night sky by adjusting the spectrum and the power of the specific light source, the amplitude is adjusted to be controlled in the radiance ranges corresponding to different night sky environments, and therefore the effect of observing the actual night sky by the night vision goggle is simulated.
The visual observation brightness of the real night sky environment is low, the effect of visual effect and night vision mirror observation is close to actual effect for realizing that the simulation training of the display is close to actual, and the night vision mirror observation mode needs to be realized by means of a special light source. The ordinary LED backlight display generally adopts a white light LED, the energy of the spectrum of the white light LED is rapidly reduced after 650nm, and in order to obtain the spectrum closer to the real night sky, the spectrum of a deep red wave band needs to be supplemented.
According to the spectral response curve of the low-light night vision goggles and the characteristics of the liquid crystal screen, the special spectral backlight system is designed, so that the emergent spectrum of the liquid crystal screen is matched with the night vision goggles, and meanwhile, the real night sky environment can be simulated.
Fig. 2 is a night sky spectrum, which includes spectral distributions under moonlight, under starlight, and 1/4 moonlight + starlight, and can reflect most of real night sky environments. Fig. 3 is a spectrum distribution (normalization processing) of a liquid crystal display screen of a common white light LED backlight, and it can be seen that the energy of the spectrum of the white light LED is rapidly reduced after 650nm, and there is a large difference with the spectrum of the actual night sky environment.
Fig. 4 is a schematic diagram of a liquid crystal display employing a deep red band narrow band light source. The light guide plate 3 receives the light emitted from the light source 1, and converts the linear light source into a surface light source by combining the reflection effect of the reflective paper 2. The uniform light passing through the optical film group 4 is incident to the liquid crystal screen 5. The spectrum and the light source 1 comprise two paths, wherein one path is a narrow-band light source such as laser, preferably a laser light source, the spectrum range is controlled in the turn-off range of the night vision goggles, the response is sensitive and does not exceed the turn-off range of the liquid crystal screen, the peak wavelength is controlled in the range of 700-720 nm, and the peak wavelength is strictly cut off after 750nm, and the other path is a white light source which can be a white LED (light emitting diode) and is a color filter with a wavelength spectrum greater than 750nm filtered. In order to approach the observation effect of the night vision goggles in the real night sky environment, the narrow-band spectral light source ensures high contrast for observation of the night vision goggles, and the relative spectral brightness of the white light source and the laser light source can be adjusted in a visual observation mode. The above measures ensure that the radiance of the special display is close to the radiance of the actual night sky, and the adjusting amplitude includes different radiance ranges corresponding to the night sky environment, so that the effect of observing the real night sky by using night vision goggles can be simulated.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (7)
1. A liquid crystal display method for night vision mirror simulation training is characterized in that according to a transmittance curve of a liquid crystal screen, a color filter which is cut off after 750nm is added to a common white LED light source, a special backlight light source which is matched with a spectrum of a starry sky environment at night is added at one path, and the spectrum and the power of the special backlight light source are controlled to ensure that the total energy of a radiation spectrum of a display relative to the night vision mirror is close to the total energy of the radiation spectrum of the actual night vision mirror relative to the night vision mirror, so that the display effect of simulating a real night vision is realized; the effect of observing the liquid crystal display by visual observation is similar to that of observing the natural night sky, and simultaneously, the spectrum of the liquid crystal display observed by the night vision goggles is similar to that of the natural night sky observed by the night vision goggles.
2. The method of claim 1, wherein the special backlight source is a deep red narrow-band light source that divides the light source into two paths, one path is a common white LED light source and a color filter that is cut off after 750nm, and the other path is a deep red narrow-band light source that simulates the spectral characteristics of the night starry sky environment and enhances the observation effect of night vision goggles; the deep red narrow-band light source for enhancing the observation effect of the night vision goggles is a laser light source or a light source with similar spectral characteristics; the spectrum of the deep red narrow-band light source needs to be strictly controlled at 680nm-720 nm; the spectrum of the light source is cut off strictly after 750 nm.
3. The method according to claim 2, wherein the lcd backlighting system of the deep red segment narrowband laser light source employs a direct backlight or a side backlight.
4. The method of claim 2, wherein the backlight source spectrum and control system is implemented by adjusting the spectrum and power of the deep red segment narrow band laser source.
5. The method according to claim 1, wherein the transmittance difference of the liquid crystal panels of different liquid crystal panels is eliminated by controlling the spectral distribution and cut-off wavelength of the special light source, and a better night vision goggles viewing effect can be achieved.
6. The method of claim 1, wherein the night vision goggles are low-light night vision goggles or a night vision imaging system; the night vision goggles are common night vision goggles without color filters, and can also be B-type, A-type or C-type night vision goggles meeting the MIL-STD-3009 standard.
7. The method of claim 1, wherein the liquid crystal display simulates an environment under night sky lighting conditions of different types.
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| CN117237258A (en) * | 2023-11-14 | 2023-12-15 | 山东捷瑞数字科技股份有限公司 | Night vision image processing method, system, equipment and medium based on three-dimensional engine |
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| TWM457891U (en) * | 2013-01-17 | 2013-07-21 | Portwell Inc | LED lamp strip module with high brightness visibility and low brightness night vision |
| CN204005555U (en) * | 2014-07-30 | 2014-12-10 | 超亮显示系统（深圳）有限公司 | Be applied to the two backing structures of side-light type of LCD liquid crystal display |
| CN204178088U (en) * | 2014-10-22 | 2015-02-25 | 天津通广集团振通电子有限公司 | A kind of intelligent backlight module possessing night vision compatible function |
| CN104635381A (en) * | 2015-03-07 | 2015-05-20 | 合肥工业大学 | Liquid crystal display LED backlight module with night vision compatibility |
| CN106292075A (en) * | 2016-11-04 | 2017-01-04 | 安徽师范大学 | A kind of liquid crystal display LED backlight system with night viewing compatible |
| CN110133911A (en) * | 2019-05-15 | 2019-08-16 | 京东方科技集团股份有限公司 | Backlight module and airborne display device |
| CN111273482A (en) * | 2020-01-21 | 2020-06-12 | 苏州奥科飞光电科技有限公司 | Novel night vision compatible backlight module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117237258A (en) * | 2023-11-14 | 2023-12-15 | 山东捷瑞数字科技股份有限公司 | Night vision image processing method, system, equipment and medium based on three-dimensional engine |
| CN117237258B (en) * | 2023-11-14 | 2024-02-09 | 山东捷瑞数字科技股份有限公司 | Night vision image processing method, system, equipment and medium based on three-dimensional engine |
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