Display system

Abstract

The invention relates to at least one screen (2) located at an air and / or space vehicle and allowing flight data and / or control indicators to be displayed on the screen, in which a daytime mode or a nighttime mode is created on the screen (2) at predetermined wavelength values; at least one programmable logic means (3) positioned in connection with the screen (2) such that flight data can be displayed on the screen (2) in a daytime mode or a nighttime mode when a user switches to the daytime mode or the nighttime mode, and such that wavelength values of pixels on the screen (2) can be determined in an RGB color space.

Description

[0001] The present invention relates to adjusting avionics displays in air and / or space vehicles to be suitable for day and night flights.

[0002] Standard ground lighting is used for avionics displays or LED (light emitting diode) indicators used in the cockpit of air and / or space vehicles during night flights. Hardware LEDs compatible with the standards for night flights are used to illuminate the displays with light intensities and wavelengths conforming to a predetermined night vision imaging system (NVIS) in accordance with military standards. Thus, with NVIS-compatible hardware LED filtering equipment, images transmitted from the central computer system in the air vehicle to the avionics displays will be displayed in an NVIS-compatible manner according to the standards. Additionally, the hardware structure ensures that all lighting structures and structures containing LCDs in the cockpit conform to military standards to avoid any interfering radiation to the user in night vision mode.

[0003] US2007218428A1 included in the known prior art discloses devices and research for enhancing night vision in the cockpit of an air vehicle. The patent document discloses an NVG mode on / off mode for the screen in the cockpit, and operations are performed in the LED as output by utilizing commands provided by the pilot in the processor, thereby providing the field of view desired by the pilot.

[0004] CN203691533U included in the known prior art discloses a video processor, a camera, and a night vision system on a vehicle. The document discloses the ability of the video processor to process received images, thereby achieving improvements adapted for night use. This document relates to collecting images through a camera or a video recorder and improving the images to enhance night vision.

[0005] Due to the display system according to the present invention, an air vehicle can be provided with a display system for the night mode at a lower cost.

[0006] Another object of the present invention is to enable the use of avionics LCDs conforming to night vision standard requirements through digital design (without a hardware structure).

[0007] Another object of the present invention is to provide a more timely viewing of avionics displays on an air vehicle in night mode without any hardware structure.

[0008] The display system (as defined in the first claim and its dependent claims) for achieving the object of the present invention includes at least one screen, which is located in the cockpit of an air and / or space vehicle, and flight data, control indicators or flight-related data from an external source are reflected to a pilot on the screen. The pilot user can convert the screen to be used in a predetermined wavelength range in a day mode or a night mode. The display system includes at least one programmable logic tool within the screen. Due to the programmable logic tool, when the user switches the air and / or space vehicle to the day mode, the data transmitted by the central avionics computer is displayed on the screen according to the day mode; and when the air and / or space vehicle is switched to the night mode, the data is displayed on the screen according to the night mode. The wavelength coordinate value of almost each pixel to be reflected on the screen is determined in the RGB (red, green, blue) color space by the programmable logic tool.

[0009] The display system according to the present invention includes a programmable logic tool, which enables conversion of the wavelength values determined for each pixel in the RGB color space to the CIE 1976 UCS (U', V'-color, luminance) space when the user switches the air and / or space vehicle from the day mode to the night mode. By the programmable logic tool, the average value of the wavelength value of the pixel converted to the CIE 1976 UCS color space and the reference wavelength value on the chromaticity diagram is calculated. The display system includes a programmable logic tool, which converts the new wavelength value of the pixel (averaged and correlated within the reference wavelength range on the chromaticity diagram) back to the RGB color space and allows it to be reflected on the screen through image processing.

[0010] In an embodiment of the present invention, a display system includes a programmable logic tool that detects the moment when an air and / or space vehicle is switched from a daytime mode to a nighttime mode after the user has switched the air vehicle from the daytime mode to the nighttime mode. As a result of the detection of the mode change, the programmable logic tool determines wavelength values based on the chromaticity coordinates of almost every pixel value of the data transmitted from a central avionics computer in the RGB color space. Pixels having wavelengths determined on the chromaticity coordinate axes in the RGB color space are transformed by the programmable logic tool to be located on the chromaticity coordinate axes in the CIE 1976 UCS space. The average value of the wavelength value of the pixels in the CIE 1976 UCS space and a reference wavelength value predetermined by the manufacturer is calculated such that the pixels on the chromaticity coordinate axes according to the wavelength value in the CIE 1976 UCS space are adjusted to the range of the reference wavelength values predetermined by the manufacturer in the CIE 1976 UCS space. As a result of the calculation of the average value, the pixel wavelength values adjusted to the range of the reference wavelength values predetermined by the manufacturer in the CIE 1976 UCS space are transformed back to the wavelength values that will be included in the chromaticity diagram in the RGB color space via the programmable logic tool. Wavelength values corresponding to the wavelength coordinate values in the RGB color space (these wavelength values are correlated according to the reference color values and luminance values in the CIE 1976 UCS space) are determined and transformed into the RGB color space. Thus, the display system includes a programmable logic tool that allows almost every pixel containing the data transmitted by the central avionics computer in the nighttime mode to be reflected on the screen by image processing performed by a color adaptation algorithm, where the wavelengths in the RGB color space are within a predetermined reference range.

[0011] In an embodiment of the present invention, a display system includes a programmable logic tool that detects the moment when a user switches an air and / or space vehicle from a daytime mode to a nighttime mode and correspondingly allows the flight data transmitted in the central avionics computer to be reflected on the screen within the wavelength range of the nighttime mode predetermined by the manufacturer by running a color adaptation algorithm.

[0012] In an embodiment of the present invention, the display system includes a programmable logic tool that, when an air and / or space vehicle switches from a daytime mode to a nighttime mode, creates pixels at the reference wavelengths of the CIE 1976 UCS space predetermined by the manufacturer without using any external hardware lighting devices by simply running a color adaptation algorithm (backlight / filter) and using flight data transmitted from a central avionics computer, thereby allowing these pixels to be displayed on a screen. The color adaptation algorithm is run by the programmable logic tool such that the predetermined nighttime mode reference wavelength values correspond to any values of a white night vision imaging system (NVIS white, u' = 0.190, v' = 0.49, r = 0.04), a green night vision imaging system (NVIS green A, u' = 0.088, v' = 0.543, r = 0.037 / NVIS green B, u' = 0.131, v' = 0.623, r = 0.057), a yellow night vision imaging system (NVIS yellow, u' = 0.274, v' = 0.622, r = 0.083), or a red night vision imaging system (NVIS red, u' = 0.450, v' = 0.550, r = 0.060).

[0013] In an embodiment of the present invention, the display system includes a color adaptation algorithm run by a programmable logic tool consisting only of a field programmable gate array (FPGA).

[0014] In an embodiment of the present invention, the display system includes a programmable logic device that is an FPGA having a color adaptation algorithm created using a hardware description language (HDL). When an air and / or space vehicle is switched to a nighttime mode by the programmable logic tool, pixels can be created within a range of wavelength values predetermined by the manufacturer on the screen, and the pixels are displayed on the screen by the user.

[0015] In an embodiment of the present invention, the display system includes a screen in the cockpit that allows a user to view flight data, and the screen is any one of a liquid crystal display (LCD), a large area display (LAD), a multifunction display (MFD), a head-up display, or a matrix integrated package (IMD).

[0016] In an embodiment of the present invention, the display system includes a programmable logic tool that, when a user switches an air and / or space vehicle to a nighttime mode, runs a color adaptation algorithm, thereby allowing pixels with data transmitted from a central avionics computer to the screen to be displayed on the screen within the reference coordinate range of a night vision imaging system (NVIS) provided in the MIL STD-3009 standard. The predetermined reference wavelength values are determined within the value range specified in the MIL STD-3009 standard according to the night vision imaging system (NVIS) reference coordinate values.

[0017] A display system for achieving the object of the present invention is shown in the drawings, in which:

[0018] Figure 1 is a schematic diagram of the screen.

[0019] Figure 2 is a schematic diagram of the programmable logic tool.

[0020] Figure 3 is a flowchart of the color adaptation algorithm.

[0021] Figure 4 is a limit chart of the MIL-STD 3009NVIS reference color wavelengths.

[0022] All parts shown in the drawings are individually assigned drawing reference numerals, and the corresponding terms in these drawings are listed below:

[0023] 1. Display system

[0024] 2. Screen

[0025] 3. Programmable logic tool

[0026] The display system (1) according to the present invention includes at least one screen (2), which is located on an air and / or space vehicle and allows flight data and / or control indicators to be displayed on the screen, wherein a daytime mode or a nighttime mode is created on the screen (2) at a predetermined wavelength value; at least one programmable logic tool (3), which is positioned to be connected to the screen (2) such that when the user switches to the daytime mode or the nighttime mode, the flight data can be displayed on the screen (2) in the daytime mode or the nighttime mode, and such that the wavelength value of the pixels on the screen (2) can be determined in the RGB color space.

[0027] The display system (1) according to the present invention includes a programmable logic tool (3), which converts the RGB color space wavelength value to a wavelength value in the CIE 1976UCS space when the user switches to the nighttime mode, and calculates the average value of the converted wavelength value and the wavelength value predetermined by the manufacturer in the reference CIE 1976UCS space, such that the pixel wavelength value in the CIE1976UCS space is adjusted to the reference wavelength value range, and the pixel wavelength value is converted back to the wavelength value in the RGB color space coordinates.

[0028] The pilot can view flight data via the screen (2) or data related to control indicators transmitted by the avionics computer in the air and / or space vehicle. The switch controlled by the pilot to determine the day mode and night mode of the air vehicle (e.g., aircraft or helicopter) is located in the cockpit. To enable the pilot to more easily read the data when the user switches from the day mode to the night mode, through the programmable logic tool (3), the pixels reflected on the screen (2) and / or the lighting equipment in the cockpit can be transformed to conform to the night mode standard wavelength values. Depending on the functions of the equipment in the cockpit, the standard wavelength values that must be reflected in the night mode will vary. Through the programmable logic tool (3)( Figure 1 , Figure 4 ) the coordinates of the wavelength values of the pixels of the data transmitted by the central avionics computer are determined in the RGB color space.

[0029] When the user switches to the night mode, the wavelength values of the data transmitted by the central avionics computer to the screen (2) in the RGB color space are converted to the corresponding wavelength coordinate values in the CIE 1976 UCS space. Thus, it can be determined whether the wavelength value of the pixel is within the range of the night mode reference wavelength values predetermined by the manufacturer in the CIE 1976 UCS space. If the wavelength value of the pixel converted from the RGB color space to the CIE 1976 UCS space is not within the range of the reference values predetermined by the manufacturer, the programmable logic tool (3) uses an image processing algorithm to calculate the average value of the said values so as to adjust it to the wavelength reference value range, and based on these wavelength coordinate values, convert it back to the RGB color space wavelength value. Thus, when the air and / or space vehicle switches to the night mode, the pixels of the data transmitted from the central avionics computer can be processed and reflected on the screen (2) according to the standards predetermined by the manufacturer.

[0030] In an embodiment of the present invention, the display system (1) includes a programmable logic tool (3), as a result of the user switching from the day mode to the night mode, the programmable logic tool processes a color adaptation algorithm, which consists of the following steps:

[0031] - Detecting that the air and / or space vehicle has switched from the day mode to the night mode (301);

[0032] - Determining the RGB color space chromaticity wavelength coordinate values by analyzing almost every pixel of the data transmitted from the central avionics computer to the screen (2) (302);

[0033] - Converting the RGB color space coordinate values of almost every pixel to the CIE 1976 UCS (u', v') space chromaticity wavelength values (303);

[0034] - Calculate the average of the chromaticity coordinates determined by these pixels in the CIE 1976 UCS space and these reference CIE 1976 UCS (u', v') coordinates predetermined by the manufacturer, so as to correlate the coordinate values of these pixels in the CIE 1976 UCS (u', v') space to fall within the range of the reference CIE 1976 UCS (u', v') chromaticity coordinate values (304);

[0035] - As a result of this correlation, the pixels that are adjusted to these reference chromaticity coordinates predetermined by the manufacturer in the CIE 1976 UCS (u', v') space are converted into RGB color space wavelength coordinates (305);

[0036] - Display almost every pixel that has been converted into RGB color space chromaticity coordinate values on the screen (2) within the range of the night mode chromaticity values predetermined by the manufacturer (306).

[0037] The color adaptation algorithm running in the programmable logic tool (3) uses RGB color space wavelength values to calculate the conversion from the RGB color space to the CIE 1976 UCS (u', v') space, and the color luminance Y' and U, V values of the pixels are calculated based on the differential rate of the Y' value with respect to blue (B) and red (R). Calculate the average value of the wavelength values corresponding to the first wavelength value of the pixels in the RGB color space of the data transmitted from the central avionics computer in the CIE 1976 UCS (u', v') space, and the average value of the coordinates of the reference wavelength values predetermined by the manufacturer, so that the coordinate values of the pixels are adjusted to the range of the reference CIE 1976 UCS (u', v') space wavelength coordinate values predetermined by the manufacturer. Therefore, the pixels with wavelength values adjusted to the reference range in the CIE 1976 UCS (u', v') space are converted back to the RGB color space and reflected on the screen (2) in its secondary wavelength value in the night mode. Run the color adaptation algorithm for almost every pixel via the programmable logic tool (3) ( Figure 3 ).

[0038] In an embodiment of the present invention, the display system (1) includes a programmable logic device (3), and the programmable logic device detects the moment when the user switches the air and / or space vehicle from the day mode to the night mode, so as to run the color adaptation algorithm. In this way, the data created by the central avionics computer in the air vehicle and transmitted to the user is processed by the programmable logic tool (3) and reflected on the screen (2) according to the night mode.

[0039] In an embodiment of the present invention, the display system (1) includes a programmable logic tool (3), as a result of the user switching to the night mode, the programmable logic tool runs a color adaptation algorithm without using an external lighting device on the screen (2), so that the data reflected on the screen (2) is displayed in the CIE 1976 UCS (u', v') space under the reference wavelength coordinate range of a white night vision imaging system, a green night vision imaging system, a yellow night vision imaging system, or a red night vision imaging system. Due to the color adaptation algorithm run by the programmable logic tool (3), when the user switches the aerial vehicle to the night mode, the data transmitted by the central avionics computer can be reflected on the screen (2) in the CIE 1976 UCS (u', v') space coordinates under the reference wavelength range of a white night vision imaging system, a green night vision imaging system, a yellow night vision imaging system, or a red night vision imaging system only using digital design techniques. Therefore, no external lighting device (backlight / filter) is required around the screen (2).

[0040] In an embodiment of the present invention, the display system (1) includes a programmable logic tool (3), which is only a field programmable gate array (FPGA). Through the field programmable gate array (which processes the pixels on the screen (2) according to the day mode in the day mode); when switching to the night mode, it runs a color adaptation algorithm and applies the pixels suitable for the night mode to the screen (2)( Figure 2 )

[0041] In an embodiment of the present invention, the display system (1) includes a programmable logic tool (3), which runs the color adaptation algorithm created using a hardware description language (HDL), thereby allowing pixels to be created on the screen (2) under the reference brightness and color value ranges predetermined by the manufacturer in the night mode.

[0042] In an embodiment of the present invention, the display system (1) includes a screen (2), which is a liquid crystal display (LCD), a large area display (LAD), a multifunction display (MFD), a head-up display, or a matrix integrated package (IMD), thereby allowing the user to display flight data in the cockpit. When the user switches the aerial vehicle to the night mode, the data collected by the central avionics computer from various sources is processed through the programmable logic tool (3) and transmitted to the user for display.

[0043] In an embodiment of the present invention, the display system (1) includes a programmable logic tool (3) that, when the air and / or space vehicle switches to the night mode (N), allows the pixels to be displayed on the screen (2) within the reference coordinate range of the night vision imaging system (NVIS) in the MIL STD-3009 standard. Depending on the functions equipped in the cockpit, the wavelength values compliant with the standard that must be reflected in the night mode will vary. For example, the illumination on the bezel buttons should comply with NVIS green (NVIS green), while the illumination such as warning lights can be NVIS red or NVIS yellow. The alphanumeric monochrome LCD should comply with NVIS green. It is desirable for the multi-color LCD to comply with the NVIS white wavelength standard. The wavelength of the pixels created from the data collected by the central avionics computer from various sources can be adjusted to the wavelength values compliant with the military night imaging standard (MIL-STD 3009) determined by the manufacturer via a color adaptation algorithm operated by the programmable logic tool (3). Figure 4 )

Claims

1. A display system (1) comprising at least one screen (2), said at least one screen being located at an air and / or space vehicle and allowing flight data and / or control indicators to be displayed on said screen, wherein, Create a day mode or a night mode on the screen (2) with a predetermined wavelength value; at least one programmable logic tool (3), the at least one programmable logic tool being positioned to be connected to the screen (2), enabling the flight data to be displayed on the screen (2) in the day mode or the night mode when the user switches to the day mode or the night mode, and enabling the determination of the wavelength value of the pixels on the screen (2) in the RGB color space, characterized in that the programmable logic tool (3), when switched to the night mode by the user, converts the RGB color space wavelength value to a wavelength value in the CIE 1976 UCS color space, and calculates the average value of the converted wavelength value and the wavelength value predetermined by the manufacturer in the reference CIE 1976 UCS color space, so that the pixel wavelength value in the CIE 1976 UCS color space is adjusted to the reference wavelength value range, and the pixel wavelength value is converted back to the wavelength value in the RGB color space coordinates.

2. The display system (1) according to claim 1, characterized in that The programmable logic tool (3), as a result of the user switching from the day mode to the night mode, processes the color adaptation algorithm, which consists of the following steps: - Detect that the air and / or space vehicle has switched from the day mode to the night mode (301); - Determine the RGB color space chromaticity wavelength coordinate values by analyzing almost every pixel of the data transmitted from the central avionics computer to the screen (2) (302); - Convert the RGB color space coordinate values of almost every pixel to the CIE 1976 UCS (u', v') space chromaticity wavelength values (303); - Calculate the average value of the chromaticity coordinates determined by these pixels in the CIE 1976 UCS space and these reference CIE 1976 UCS (u', v') coordinates predetermined by the manufacturer, so as to correlate the coordinate values of these pixels in the CIE 1976 UCS (u', v') space to fall within the reference CIE 1976 UCS (u', v') chromaticity coordinate value range (304); - As a result of this correlation, convert the pixels adjusted to these reference chromaticity coordinates predetermined by the manufacturer in the CIE 1976 UCS (u', v') space to RGB color space wavelength coordinates (305); - Display almost every pixel converted to the RGB color space chromaticity coordinate values in the night mode chromaticity value range predetermined by the manufacturer on the screen (2) (306).

3. The display system (1) according to claim 1 or claim 2, characterized in that The programmable logic device (3) detects the moment when the user switches the air and / or space vehicle from the day mode to the night mode, thereby running the color adaptation algorithm.

4. The display system (1) according to any one of the above claims, characterized in that As a result of the user switching to the night mode, the programmable logic tool (3) runs the color adaptation algorithm without using the external lighting device on the screen (2), such that the data reflected on the screen (2) is displayed in the CIE1976UCS (u', v') space under the reference wavelength coordinate ranges of a white night vision imaging system, a green night vision imaging system, a yellow night vision imaging system, or a red night vision imaging system.

5. The display system (1) according to any one of the above claims, characterized in that The programmable logic tool (3) is only a field programmable gate array (FPGA).

6. The display system (1) according to any one of the above claims, characterized in that The programmable logic tool (3) runs the color adaptation algorithm created using a hardware description language (HDL), thereby allowing pixels to be created on the screen (2) in the night mode under the reference luminance and the color value range predetermined by the manufacturer.

7. The display system (1) according to any one of the above claims, characterized in that The screen (2) is a liquid crystal display (LCD), a large area display (LAD), a multifunction display (MFD), a head-up display, or a matrix integrated package (IMD), thereby allowing the user to display flight data in the cockpit.

8. The display system (1) according to any one of the above claims, characterized in that The programmable logic tool (3), when the air and / or space vehicle switches to the night mode (N), allows these pixels to be displayed on the screen (2) under the night vision imaging system (NVIS) reference coordinate ranges in the MIL STD-3009 standard.

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