Preparation method of display screen compatible with night vision imaging system and display screen
By determining the target pixel unit in the display screen that is compatible with the night vision imaging system and performing white balance design, the problem in the existing technology that the display screen design is complex and the resolution is not significantly improved is solved, and the integration with the night vision imaging system is achieved. Compatibility and display resolution improvements.
Patent Information
- Application Number
- CN202411451350.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-01-17
AI Technical Summary
The existing on-board display screens need to avoid the sensitive bands of the night vision imaging system when designing, resulting in complex design and less obvious improvement in resolution, making it difficult to achieve compatibility with the night vision imaging system.
By determining target pixel units whose radiance is less than or equal to the red light and white light radiance thresholds of the night vision imaging system, perform white balance design to obtain candidate pixel units compatible with the night vision imaging system, and prepare display screens based on these candidate pixel units.
It achieves compatibility with night vision imaging systems, simplifies the design process of the display screen, avoids the crowding of pixel areas and the increase in backplane circuit complexity, and improves the resolution of the display screen.
Smart Images
Figure CN119325316A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of airborne displays, and in particular to a method for preparing a display screen that is compatible with a night vision imaging system and a display screen. Background Art
[0002] In order to enable pilots to clearly identify the surrounding environment during night flight, aircraft are usually equipped with a night vision imaging system (NVIS) to enhance the image of the scenery outside the cabin. The night vision imaging system is more sensitive to light in the near-infrared band. Therefore, when designing the optical design of the onboard display screen, it is necessary to avoid the sensitive band of the night vision imaging system to achieve compatibility with the night vision imaging system.
[0003] In the related art, in order to achieve compatibility with night vision imaging systems, the design of display screens usually adopts a dual optical system, that is, a set of pixel arrays for night vision is added to the display pixels of the display screen. This method not only occupies the normal pixel area and increases the complexity of the pixel backplane circuit, but also does not take advantage of the improvement in the resolution of the display screen. Therefore, a new method for preparing a display screen compatible with a night vision imaging system is urgently needed. Summary of the invention
[0004] In view of this, a method for preparing a display screen compatible with a night vision imaging system and a display screen are proposed.
[0005] In a first aspect, an embodiment of the present application provides a method for preparing a display screen compatible with a night vision imaging system, the method comprising: determining a target red light sub-pixel unit whose radiance is less than or equal to a red light radiance threshold of the night vision imaging system; determining a target green light sub-pixel unit and a target blue light sub-pixel unit; performing white balance design on the target red light sub-pixel unit, the target green light sub-pixel unit, and the target blue light sub-pixel unit to obtain a candidate pixel unit; when the radiance of the candidate pixel unit when emitting white light is less than or equal to the white light radiance threshold of the night vision imaging system, determining the candidate pixel unit as a target pixel unit; preparing a display screen based on the target pixel unit to obtain a display screen compatible with the night vision imaging system.
[0006] In some possible implementations, determining a target red sub-pixel unit whose radiance is less than or equal to a red light radiance threshold of a night vision imaging system includes: for any candidate red sub-pixel unit, exciting the candidate red sub-pixel unit to emit light by means of a constant current; when the candidate red sub-pixel unit emits light, measuring a first brightness value and simultaneously collecting first spectral data; determining the radiance of the candidate red sub-pixel unit when it emits light based on the first brightness value and the first spectral data; when the radiance of the candidate red sub-pixel unit when it emits light is less than or equal to the red light radiance threshold, determining the candidate red sub-pixel unit as a target red sub-pixel unit.
[0007] In some possible implementations, the determining of a target red light sub-pixel unit whose radiance is less than or equal to a red light radiance threshold of a night vision imaging system further includes: when the radiance of the candidate red light sub-pixel unit when emitting light is greater than the red light radiance threshold, selecting a new candidate red light sub-pixel unit, wherein the dominant wavelength of the newly selected candidate red light sub-pixel unit is smaller than the dominant wavelength of the candidate red light sub-pixel unit in the previous implementation.
[0008] In some possible implementations, determining a target red sub-pixel unit whose radiance is less than or equal to a red light radiance threshold of a night vision imaging system includes: for any red light emitting material grown on an epitaxial wafer, causing the red light emitting material to emit light by photoexcitation; when the red light emitting material emits light, measuring a second brightness value and simultaneously collecting second spectral data; determining the radiance of the red light emitting material when emitting light based on the second brightness value and the second spectral data; when the radiance of the red light emitting material when emitting light is less than or equal to the red light radiance threshold, preparing a target red sub-pixel unit based on the red light emitting material.
[0009] In some possible implementations, the method further includes: when the radiance of the candidate pixel unit when emitting white light is greater than the white light radiance threshold, and the difference between the radiance of the candidate pixel unit when emitting white light and the white light radiance threshold is less than the difference threshold, performing white balance adjustment on the candidate pixel unit.
[0010] In some possible implementations, the method further includes: when the radiance of the candidate pixel unit when emitting white light is greater than the white light radiance threshold, and the difference between the radiance of the candidate pixel unit when emitting white light and the white light radiance threshold is greater than or equal to the difference threshold, replacing the target green light sub-pixel unit and the target blue light sub-pixel unit in the candidate pixel unit.
[0011] In some possible implementations, the target red photon sub-pixel unit is a red light micro-LED chip, the target blue photon sub-pixel unit is a blue light micro-LED chip, and the target green photon sub-pixel unit is a green light micro-LED chip.
[0012] In some possible implementations, when the candidate pixel unit emits white light, the dominant wavelength of the target green light sub-pixel unit is between 520 nm and 540 nm, and the dominant wavelength of the target blue light sub-pixel unit is between 460 nm and 480 nm.
[0013] In a second aspect, an embodiment of the present application provides a display screen that is compatible with a night vision imaging system and is prepared by any one of the methods for preparing a display screen that is compatible with a night vision imaging system described in the first aspect above.
[0014] The method for preparing a display screen compatible with a night vision imaging system in the embodiment of the present application uses a red, green and blue tricolor optical system to obtain a target pixel unit compatible with a night vision imaging system by simply measuring and calculating the radiance of red light and white light. Based on the target pixel unit, a display screen compatible with a night vision imaging system can be directly prepared. Compared with the method of preparing a display screen and then conducting a night vision compatibility test, the method in the embodiment of the present application is simple, practical, easy to operate, and can not only save time and cost, but also shorten the production and iteration cycle of a display screen compatible with a night vision imaging system.
[0015] These and other aspects of the present application will become more apparent from the following description of the embodiment(s). BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.
[0017] Figure 1 A flow chart showing a method for preparing a display screen compatible with a night vision imaging system according to an embodiment of the present application.
[0018] Figure 2 A cross-sectional schematic diagram of a display panel of a display screen according to an embodiment of the present application is shown. DETAILED DESCRIPTION
[0019] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.
[0020] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.
[0021] In addition, in order to better illustrate the present application, numerous specific details are provided in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.
[0022] In order to solve the above technical problems, the present application provides a method for preparing a display screen compatible with a night vision imaging system, including: determining a target red light sub-pixel unit whose radiance is less than or equal to the red light radiance threshold of the night vision imaging system; determining a target green light sub-pixel unit and a target blue light sub-pixel unit; performing white balance design on the target red light sub-pixel unit, the target green light sub-pixel unit and the target blue light sub-pixel unit to obtain a candidate pixel unit; when the radiance of the candidate pixel unit when emitting white light is less than or equal to the white light radiance threshold of the night vision imaging system, determining the candidate pixel unit as a target pixel unit; preparing a display screen according to the target pixel unit to obtain a display screen compatible with the night vision imaging system.
[0023] The method for preparing a display screen compatible with a night vision imaging system in the embodiment of the present application uses a red, green and blue tricolor optical system to obtain a target pixel unit compatible with a night vision imaging system by simply measuring and calculating the radiance of red light and white light. Based on the target pixel unit, a display screen compatible with a night vision imaging system can be directly prepared. Compared with the method of preparing a display screen and then conducting a night vision compatibility test, the method in the embodiment of the present application is simple, practical, easy to operate, and can not only save time and cost, but also shorten the production and iteration cycle of a display screen compatible with a night vision imaging system.
[0024] Compared with a display screen of a dual optical system, a display screen prepared by the method of an embodiment of the present application will not occupy a normal pixel area, will not increase the complexity of the pixel backplane circuit, and is also beneficial to improving the resolution of the display screen.
[0025] Night vision imaging systems can be divided into Class A, Class B, and Class C according to the application scenario. The sensitive band of Class A night vision imaging systems is greater than 610nm, the sensitive band of Class B night vision imaging systems is greater than 625nm, and the sensitive band of Class C night vision imaging systems is greater than 675nm. For aircraft cockpits with color display screens, Class B night vision imaging systems are usually used. Therefore, the embodiments of this application will be described using Class B night vision imaging systems as an example. In addition, the specific requirements for the compatibility of display screens with night vision imaging systems can refer to relevant standards, such as the National Military Standard 1394-92 "Aircraft interior lighting compatible with night vision imaging systems".
[0026] Figure 1 A flow chart showing a method for preparing a display screen compatible with a night vision imaging system according to an embodiment of the present application is shown. Figure 1 As shown, the method includes:
[0027] Step S11, determining a target red light sub-pixel unit whose radiance is less than or equal to a red light radiance threshold of a night vision imaging system.
[0028] The display screen is not compatible with the night vision imaging system, mainly because the radiance of the red and white light of the display screen exceeds the standard. In order to ensure the compatibility of the airborne display screen with the night vision imaging system, the radiance of the red and white light of the airborne display screen needs to meet the requirements of the night vision imaging system.
[0029] In a red, green and blue three-color display screen, red light is emitted by a red photon sub-pixel unit. Therefore, when preparing a display screen compatible with a night vision imaging system, first, in step S11, a target red photon sub-pixel unit whose radiance is less than or equal to the red light radiance threshold of the night vision imaging system may be determined. The target red photon sub-pixel unit here may be a red micro light emitting diode (Micro-LED) chip.
[0030] The target red photon sub-pixel unit can be directly selected from the candidate red photon sub-pixel units according to the radiance, or a red light emitting material compatible with the night vision imaging system can be selected from the red light emitting materials grown on the epitaxial wafer according to the radiance, and then the target red photon sub-pixel unit is prepared based on the selected red light emitting material. Those skilled in the art can set the determination method of the target red photon sub-pixel unit according to actual conditions, and this application does not limit this.
[0031] Step S12, determining a target green sub-pixel unit and a target blue sub-pixel unit.
[0032] Since the dominant wavelengths of the green sub-pixel unit and the blue sub-pixel unit are far from the sensitive band of the night vision imaging system, their radiance may not be considered when selecting the target green sub-pixel unit and the target blue sub-pixel unit. The target green sub-pixel unit may be selected from the candidate green sub-pixel units, and the target blue sub-pixel unit may be selected from the candidate blue sub-pixel units based on the dominant wavelength, half-peak width and other characteristics. Those skilled in the art may set the specific basis for selecting the target green sub-pixel unit and the target blue sub-pixel unit according to actual conditions, and this application does not impose any restrictions on this.
[0033] Among them, the target green light sub-pixel unit can be a green light micro light emitting diode (Micro Light Emitting Diode, Micro-LED) chip; the target blue light sub-pixel unit can be a blue light micro light emitting diode (Micro Light Emitting Diode, Micro-LED) chip.
[0034] Step S13, performing white balance design on the target red sub-pixel unit, the target green sub-pixel unit and the target blue sub-pixel unit to obtain candidate pixel units.
[0035] After selecting the target red sub-pixel unit, the target green sub-pixel unit and the target blue sub-pixel unit, the white balance design can be performed on the target red sub-pixel unit, the target green sub-pixel unit and the target blue sub-pixel unit. When designing the white balance, a simple Micro-LED display device (a passive light-emitting device can be prepared according to the target red sub-pixel unit, the target green sub-pixel unit and the target blue sub-pixel unit, and the size can be controlled within 1 inch to simplify the operation process), and then different currents are given through the red, green and blue three channels to adjust the red, green and blue light emission ratios to obtain white light emission. When designing the white balance, the main wavelength of the target green sub-pixel unit can be controlled between 520nm and 540nm, and the main wavelength of the target blue sub-pixel unit can be controlled between 460nm and 480nm to improve the accuracy of green and blue light.
[0036] The target red sub-pixel unit, target green sub-pixel unit and target blue sub-pixel unit after white balance design can be used as candidate pixel units. Each candidate pixel unit includes a target red sub-pixel unit, a target green sub-pixel unit and a target blue sub-pixel unit.
[0037] Step S14, when the radiance of the candidate pixel unit when emitting white light is less than or equal to the white light radiance threshold of the night vision imaging system, the candidate pixel unit is determined as the target pixel unit.
[0038] The radiance of the candidate pixel unit when emitting white light can be measured and calculated, and the radiance of the candidate pixel unit when emitting white light can be compared with the white light radiance threshold of the night vision imaging system. When the radiance of the candidate pixel unit when emitting white light is less than or equal to the white light radiance threshold of the night vision imaging system, it is considered that the candidate pixel unit meets the compatibility requirements with the night vision imaging system (i.e., meets the night vision compatibility requirements), and the candidate pixel unit can be determined as the target pixel unit. In the case where the target red sub-pixel unit, the target green sub-pixel unit, and the target blue sub-pixel unit are all Micro-LED chips, the target pixel unit can be a Micro-LED pixel unit.
[0039] Step S15, preparing a display screen according to the target pixel unit to obtain a display screen compatible with a night vision imaging system.
[0040] A plurality of target pixel units can be determined by the method described in step S11 to step S14. Each target pixel unit corresponds to a pixel on the display screen. When the number of target pixel units reaches a preset number (determined according to the pixels of the display), a display screen can be prepared according to the target pixel units. When preparing the display screen, in the case where the red, green and blue sub-pixel units are Micro-LED chips, the connection between the Micro-Led chip and the driving circuit on the driving backplane can be achieved through mass transfer and bonding processes.
[0041] In some possible implementations, the method further includes: when the radiance of the candidate pixel unit when emitting white light is greater than the white light radiance threshold, and the difference between the radiance of the candidate pixel unit when emitting white light and the white light radiance threshold is less than the difference threshold, performing white balance adjustment on the candidate pixel unit.
[0042] When the radiance of the candidate pixel unit when emitting white light is greater than the white light radiance threshold of the night vision imaging system, it can be considered that the candidate pixel unit does not meet the compatibility requirements with the night vision imaging system (i.e., it does not meet the night vision compatibility requirements), and the candidate pixel unit needs to be adjusted. First, the difference between the radiance of the candidate pixel unit when emitting white light and the white light radiance threshold of the night vision imaging system can be calculated; then it is determined whether the difference is less than the difference threshold. When the difference is less than the difference threshold, it is considered that the radiance of the candidate pixel unit when emitting white light is not much different from the white light radiance threshold, and the candidate pixel unit can be white-balanced, that is, the luminous ratio of the red sub-pixel unit, the green sub-pixel unit, and the blue sub-pixel unit in the candidate pixel unit is adjusted to regain white light emission.
[0043] Then, the above step S14 can be re-executed on the candidate pixel unit after white balance adjustment to obtain the target pixel unit. It should be noted that in practical applications, the candidate pixel unit may need to be adjusted for white balance multiple times before obtaining the target pixel unit.
[0044] In an embodiment of the present application, when the radiance of the candidate pixel unit when emitting white light is greater than the white light radiance threshold of the night vision imaging system, and the difference between the radiance of the candidate pixel unit when emitting white light and the white light radiance threshold is less than the difference threshold, the candidate pixel unit is white balanced. Thus, when the radiance of the candidate pixel unit when emitting white light is not much different from the white light radiance threshold, the radiance of the candidate pixel unit when emitting white light can be reduced by white balance adjustment.
[0045] In some possible implementations, the method further includes: when the radiance of the candidate pixel unit when emitting white light is greater than the white light radiance threshold, and the difference between the radiance of the candidate pixel unit when emitting white light and the white light radiance threshold is greater than or equal to the difference threshold, replacing the target green light sub-pixel unit and the target blue light sub-pixel unit in the candidate pixel unit.
[0046] When the radiance of the candidate pixel unit when emitting white light is greater than the white light radiance threshold of the night vision imaging system, and the difference between the radiance of the candidate pixel unit when emitting white light and the white light radiance threshold is greater than or equal to the difference threshold, it is considered that the radiance of the candidate pixel unit when emitting white light is too different from the white light radiance threshold. However, since the target red sub-pixel unit in the candidate pixel unit is selected based on the radiance, in this case, the target green sub-pixel unit and the target blue sub-pixel unit in the candidate pixel unit can be replaced, and then the above steps S13 and S14 can be re-executed to obtain the target pixel unit.
[0047] In an embodiment of the present application, when the radiance of the candidate pixel unit when emitting white light is greater than the white light radiance threshold of the night vision imaging system, and the difference between the radiance of the candidate pixel unit when emitting white light and the white light radiance threshold is greater than or equal to the difference threshold, the target green light sub-pixel unit and the target blue light sub-pixel unit in the candidate pixel unit are replaced, so that when the difference between the radiance of the candidate pixel unit when emitting white light and the white light radiance threshold is too large, a new candidate pixel unit can be obtained by replacing the target green light sub-pixel unit and the target blue light sub-pixel unit.
[0048] Figure 2 FIG. 2 is a cross-sectional schematic diagram of a display panel of a display screen according to an embodiment of the present application. Figure 2 As shown, the display panel includes a driving backplane 21 and a Micro-LED chipset 22, and the Micro-LED chipset 22 includes a plurality of Micro-LED pixel units 23 ( Figure 2 3 Micro-LED pixel units are exemplarily shown in the figure), each Micro-LED pixel unit 23 includes a red light Micro-LED chip 24, a green light Micro-LED chip 25 and a blue light Micro-LED chip 26.
[0049] Among them, the red light Micro-LED chip 24 can also be called a red light sub-pixel unit, the green light Micro-LED chip 25 can also be called a green light sub-pixel unit, and the blue light Micro-LED chip 26 can also be called a blue light sub-pixel unit.
[0050] The following is a detailed description of step S11 in the method for preparing a display screen compatible with a night vision imaging system according to an embodiment of the present application.
[0051] As mentioned above, in step S11, a target red sub-pixel unit whose radiance is less than or equal to the red light radiance threshold of the night vision imaging system may be determined. In some possible implementations, step S11 may include: for any candidate red sub-pixel unit, stimulating the candidate red sub-pixel unit to emit light by a constant current; when the candidate red sub-pixel unit emits light, measuring a first brightness value and simultaneously collecting first spectral data; determining the radiance of the candidate red sub-pixel unit when it emits light based on the first brightness value and the first spectral data; when the radiance of the candidate red sub-pixel unit when it emits light is less than or equal to the red light radiance threshold, determining the candidate red sub-pixel unit as a target red sub-pixel unit.
[0052] A target red sub-pixel unit can be selected from the candidate red sub-pixel units. For any candidate red sub-pixel unit, such as the red Micro-LED chip Chp1, the candidate red sub-pixel unit (red Micro-LED chip Chp1) can be excited by a constant current to emit light; then, when the candidate red sub-pixel unit (red Micro-LED chip Chp1) emits light, a first brightness value is measured by a spectroradiometer, and first spectrum data is collected at the same time; then, based on the first brightness value and the first spectrum data, the radiance of the candidate red sub-pixel unit (red Micro-LED chip Chp1) when emitting light is calculated.
[0053] The radiance NR of the candidate red sub-pixel unit (red light Micro-LED chip Chp1) when emitting light can be calculated by the following formula (1):
[0054]
[0055] In formula (1), the value of G(λ)max is 1mA / W; G B(λ) is the relative spectral response of the Class B night vision imaging system (which can be obtained from relevant standards); N(λ) is the first spectral data obtained by measurement; S is the proportionality coefficient, S=L r / L m ,L r It is a fixed value of 1.713cd / m2, which is used to indicate the brightness corresponding to the radiance of the specified night vision imaging system. m is the first brightness value obtained by measurement.
[0056] Then, the radiance of the candidate red sub-pixel unit (red light Micro-LED chip Chp1) when emitting light can be compared with the red light radiance threshold of the night vision imaging system. If the radiance of the candidate red sub-pixel unit (red light Micro-LED chip Chp1) when emitting light is less than or equal to the red light radiance threshold of the night vision imaging system, the candidate red sub-pixel unit (red light Micro-LED chip Chp1) is considered to meet the night vision compatibility requirements and is determined as the target red sub-pixel unit.
[0057] In an embodiment of the present application, a candidate red photon pixel unit is made to emit light by constant current excitation, and when the candidate red photon pixel unit emits light, the brightness value is measured and spectral data is collected, and then the radiant brightness of the candidate red photon pixel unit is calculated, and then the target red photon pixel unit whose radiant brightness meets the requirements is selected. This method is simple and convenient, and can improve the selection efficiency of the target red photon pixel unit.
[0058] In some possible implementations, if the radiance of the candidate red sub-pixel unit (red light Micro-LED chip Chp1) when emitting light is greater than the red light radiance threshold of the night vision imaging system, it is considered that the candidate red sub-pixel unit does not meet the night vision compatibility requirements and cannot be used. In this case, a new candidate red sub-pixel unit can be reselected, such as the red light Micro-LED chip Chp2, and the radiance calculation and comparison are performed again. Among them, the main wavelength of the newly selected candidate red sub-pixel unit (red light Micro-LED chip Chp2) is smaller than the main wavelength of the candidate red sub-pixel unit (red light Micro-LED chip Chp1) that did not meet the requirements before. In this way, the probability of selecting the target red sub-pixel unit can be improved.
[0059] In some possible implementations, step S11 includes: for any red light emitting material grown on the epitaxial wafer, causing the red light emitting material to emit light through photoexcitation; when the red light emitting material emits light, measuring a second brightness value and simultaneously collecting second spectral data; determining the radiant brightness of the red light emitting material when emitting light based on the second brightness value and the second spectral data; when the radiant brightness of the red light emitting material when emitting light is less than or equal to the red radiant brightness threshold, preparing a target red light sub-pixel unit based on the red light emitting material.
[0060] When preparing a red light sub-pixel unit, a red light-emitting material needs to be grown on an epitaxial wafer. For any red light-emitting material grown on the epitaxial wafer, the red light-emitting material is photoexcited (excited by ultraviolet light, deep ultraviolet light, or other high-energy light), and when the red light-emitting material emits light, a second brightness value is measured by a spectroradiometer, and second spectrum data is collected at the same time. Then, the second brightness value and the second spectrum data are substituted into the above formula (1) to calculate the radiance of the red light-emitting material when it emits light.
[0061] The radiance of the red light luminescent material when emitting light can then be compared with the red light radiance threshold of the night vision imaging system. If the radiance of the red light luminescent material when emitting light is less than or equal to the red light radiance threshold of the night vision imaging system, it is considered that the red light luminescent material meets the night vision compatibility requirements, and the target red light sub-pixel unit can be prepared based on the red light luminescent material.
[0062] In the embodiments of the present disclosure, for any red light emitting material grown on the epitaxial wafer, the red light emitting material can be made to emit light through photoexcitation, and when the red light emitting material emits light, a second brightness value is measured and second spectral data is collected simultaneously; then, based on the second brightness value and the second spectral data, the radiance of the red light emitting material when emitting light is determined, and when the radiance of the red light emitting material when emitting light is less than or equal to a red light radiance threshold, a target red light sub-pixel unit is prepared based on the red light emitting material, so that at the stage of growing the red light emitting material on the epitaxial wafer, a red light emitting material whose radiance meets the night vision compatibility requirements can be selected, and the target red light sub-pixel unit can be prepared based on the selected red light emitting material, which can not only save time and cost, but also shorten the iteration cycle.
[0063] It should be noted that in step S14, the radiant brightness of the candidate pixel unit when emitting white light can also be calculated using the above formula (1). The specific calculation method is similar to the calculation method of the radiant brightness of the candidate red sub-pixel unit when emitting light, and will not be repeated here.
[0064] An embodiment of the present application also provides a display screen that is compatible with a night vision imaging system and is prepared by the method described in the above embodiment.
[0065] The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the device, system, method and computer program product according to multiple embodiments of the present application. In this regard, each square frame in the flow chart or block diagram can represent a part of a module, program segment or instruction, and a part of the module, program segment or instruction includes one or more executable instructions for realizing the logical function of the specification. In some alternative implementations, the functions marked in the square frame can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square frames can actually be executed substantially in parallel, and they can also be executed in reverse order sometimes, depending on the functions involved.
[0066] It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented by hardware that performs the corresponding function or action (such as a circuit or ASIC (Application Specific Integrated Circuit)), or can be implemented by a combination of hardware and software, such as firmware.
[0067] Although the present invention is described herein in conjunction with various embodiments, in the process of implementing the claimed invention, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.
[0068] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1. A method for preparing a display screen compatible with a night vision imaging system, characterized in that: The method comprises: Determine a target red light sub-pixel unit whose radiance is less than or equal to a red light radiance threshold of a night vision imaging system; Determine a target green light sub-pixel unit and a target blue light sub-pixel unit; Performing white balance design on the target red sub-pixel unit, the target green sub-pixel unit, and the target blue sub-pixel unit to obtain candidate pixel units; When the radiance of the candidate pixel unit when emitting white light is less than or equal to the white light radiance threshold of the night vision imaging system, determining the candidate pixel unit as a target pixel unit; A display screen is prepared according to the target pixel unit to obtain a display screen compatible with a night vision imaging system.
2. The method according to claim 1, characterized in that The step of determining a target red light sub-pixel unit whose radiance is less than or equal to a red light radiance threshold of a night vision imaging system comprises: For any candidate red photon sub-pixel unit, stimulating the candidate red photon sub-pixel unit to emit light by a constant current; When the candidate red sub-pixel unit emits light, measuring a first brightness value and collecting first spectrum data; Determine the radiance of the candidate red sub-pixel unit when emitting light according to the first brightness value and the first spectrum data; When the radiance of the candidate red light sub-pixel unit when emitting light is less than or equal to the red light radiance threshold, the candidate red light sub-pixel unit is determined as a target red light sub-pixel unit.
3. The method according to claim 2, characterized in that The step of determining a target red light sub-pixel unit whose radiance is less than or equal to a red light radiance threshold of a night vision imaging system further comprises: When the radiance of the candidate red light sub-pixel unit when emitting light is greater than the red light radiance threshold, a new candidate red light sub-pixel unit is selected, wherein the main wavelength of the newly selected candidate red light sub-pixel unit is smaller than the main wavelength of the candidate red light sub-pixel unit described in claim 2.
4. The method according to claim 1, characterized in that: The step of determining a target red light sub-pixel unit whose radiance is less than or equal to a red light radiance threshold of a night vision imaging system comprises: For any red light emitting material grown on the epitaxial wafer, the red light emitting material is made to emit light by photoexcitation; When the red light emitting material emits light, measuring a second brightness value and collecting second spectrum data at the same time; Determine the radiance of the red light luminescent material when emitting light according to the second brightness value and the second spectrum data; When the radiance of the red light emitting material when emitting light is less than or equal to the red light radiance threshold, a target red light sub-pixel unit is prepared based on the red light emitting material.
5. The method according to claim 1, characterized in that The method further comprises: When the radiance of the candidate pixel unit when emitting white light is greater than the white light radiance threshold, and the difference between the radiance of the candidate pixel unit when emitting white light and the white light radiance threshold is less than the difference threshold, white balance adjustment is performed on the candidate pixel unit.
6. The method according to claim 1, characterized in that The method further comprises: When the radiance of the candidate pixel unit when emitting white light is greater than the white light radiance threshold, and the difference between the radiance of the candidate pixel unit when emitting white light and the white light radiance threshold is greater than or equal to the difference threshold, replace the target green sub-pixel unit and the target blue sub-pixel unit in the candidate pixel unit.
7. The method according to claim 1, characterized in that The target red photon pixel unit is a red light micro-light emitting diode chip, the target blue photon pixel unit is a blue light micro-light emitting diode chip, and the target green photon pixel unit is a green light micro-light emitting diode chip.
8. The method according to claim 1, characterized in that When the candidate pixel unit emits white light, the dominant wavelength of the target green light sub-pixel unit is between 520 nm and 540 nm, and the dominant wavelength of the target blue light sub-pixel unit is between 460 nm and 480 nm.
9. A display screen, characterized in that: The display screen is compatible with a night vision imaging system and is prepared by the method described in any one of claims 1 to 8.