Display module, preparation method thereof, night vision compatible method and display device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING BOE SPECIAL DISPLAY TECH CO LTD
- Filing Date
- 2026-03-10
- Publication Date
- 2026-06-16
Smart Images
Figure CN122227751A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, and in particular to a display module and its manufacturing method, a night vision compatible method, and a display device. Background Technology
[0002] Currently, in certain specialized applications, such as aircraft cockpits, displays are required to have night vision compatibility. New self-emissive display modules possess characteristics such as self-illumination, high color gamut, and long lifespan. Therefore, research on night vision compatibility based on self-emissive display modules is imperative. Conventional LCDs use an RGBO four-color LED scheme to achieve night vision compatibility; for example, the three primary color RGB LEDs are turned on during the day, and the OGB LEDs are turned on at night. Therefore, in new display technologies such as Mini LEDs and Micro LEDs, achieving night vision compatibility of the display module without increasing the number of LEDs is a pressing issue that needs to be addressed. Summary of the Invention
[0003] The purpose of this application is to provide a display module and its manufacturing method, a night vision compatible method, and a display device, so that the display module can achieve night vision compatibility.
[0004] To solve the above-mentioned technical problems, this application is implemented as follows:
[0005] In a first aspect, embodiments of this application provide a display module, including:
[0006] substrate;
[0007] A light-emitting diode (LED) chip layer is located on the substrate, the LED chip layer including red LED chips, green LED chips and blue LED chips;
[0008] A secondary modulation layer located on the LED chip layer, the secondary modulation layer being used at least to modulate the emission spectrum wavelength of the red LED chip;
[0009] The pre-processed red LED chip has a main emission wavelength in the range of 600nm to 610nm after being modulated by the secondary modulation layer.
[0010] Optionally, the dominant wavelength of the emission spectrum of the green LED chip is located in the range of 520nm~526nm after being modulated by the secondary modulation layer, and the dominant wavelength of the emission spectrum of the blue LED chip is located in the range of 445nm~455nm after being modulated by the secondary modulation layer.
[0011] Optionally, it further includes a driving layer located between the substrate and the LED chip layer, the driving layer being used to modulate the relative intensity of the emission spectra of the red LED chip, the green LED chip and the blue LED chip.
[0012] Optionally, the relative intensity ratio of the emission spectra of the blue LED chip, the green LED chip, and the red LED chip is 10:8:5.
[0013] Secondly, embodiments of this application also provide a method for manufacturing a display module, for producing the display module as described above, the method comprising:
[0014] Forming a substrate;
[0015] An LED chip layer is formed on the substrate, the LED chip layer including red LED chips, green LED chips and blue LED chips;
[0016] A secondary modulation layer is formed on the LED chip layer, and the secondary modulation layer is used to modulate the emission spectrum wavelength of the red LED chip at least.
[0017] The pre-processed red LED chip has a main emission wavelength in the range of 600nm to 610nm after being modulated by the secondary modulation layer.
[0018] Optionally, the method further includes:
[0019] A driving layer is formed between the substrate and the LED chip layer, the driving layer being used to modulate the relative intensity of the emission spectra of the red LED chip, the green LED chip and the blue LED chip.
[0020] Thirdly, embodiments of this application also provide a night vision compatible method, using the display module described above, the method comprising:
[0021] The emission spectrum wavelength of the red LED chip in the LED chip layer is modulated at least by using a spectral secondary modulation layer.
[0022] The pre-processed red LED chip has a main emission wavelength in the range of 600nm to 610nm after being modulated by the secondary modulation layer.
[0023] Optionally, the method further includes:
[0024] The emission spectrum of the green LED chip in the LED chip layer is modulated to the range of 520nm~526nm using the spectral secondary modulation layer.
[0025] The emission spectrum of the blue LED chip in the LED chip layer is modulated to the range of 445nm~455nm using the spectral secondary modulation layer.
[0026] Optionally, the method further includes:
[0027] The relative intensity of the emission spectra of the red, green, and blue LED chips in the LED chip layer is modulated using a driving layer.
[0028] Fourthly, embodiments of this application also provide a display device, including the display module described above.
[0029] The display module provided in this application includes: a substrate; an LED chip layer on the substrate, the LED chip layer including red LED chips, green LED chips and blue LED chips; and a spectral secondary modulation layer on the LED chip layer, the spectral secondary modulation layer being used at least to modulate the emission spectrum wavelength of the red LED chip to reduce the impact on radiance and radiance coordinates; wherein, after pre-processing, the main wavelength of the emission spectrum of the red LED chip is modulated by the spectral secondary modulation layer to be in the range of 600nm~610nm, which enables the display module to achieve night vision compatibility. Attached Figure Description
[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a structural diagram of a display module provided in an embodiment of this application;
[0032] Figure 2 This is a schematic diagram of RGB adjustment of a display module provided in an embodiment of this application;
[0033] Figure 3 This is a schematic diagram of RGB adjustment for another display module provided in an embodiment of this application;
[0034] Figure 4 This is a schematic diagram of RGB adjustment for another display module provided in an embodiment of this application;
[0035] Figure 5 This is a schematic diagram of RGB adjustment for another display module provided in an embodiment of this application;
[0036] Figure 6This is a flowchart illustrating a method for manufacturing a display module according to an embodiment of this application;
[0037] Figure 7 This is a flowchart of a night vision compatible method provided in an embodiment of this application. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application.
[0039] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," etc., mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The terms "connected," "linked," etc., are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0040] The features such as "parallel," "perpendicular," and "identical" used in the embodiments of this application include features in the strict sense of "parallel," "perpendicular," and "identical," as well as cases where "approximately parallel," "approximately perpendicular," and "approximately identical" include certain tolerances. Taking into account the measurement and the tolerances associated with the measurement of a specific quantity (e.g., limitations of the measurement system), they represent the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, "approximately" can mean within one or more standard deviations, or within 3% or 5% of said value.
[0041] Furthermore, throughout this document, unless otherwise defined, the terms “substantially,” “essentially,” “approximately,” and “about” are used to describe and explain small variations. When used with an event or situation, these terms can cover situations where the event or situation occurs precisely or approximately. For example, when used with a numerical value, these terms can include a range of variation of the value less than or equal to 10%, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%. The term “substantially coplanar” can refer to two surfaces arranged along the same plane within a micrometer range, such as within 40 μm, 30 μm, 20 μm, 10 μm, or 1 μm.
[0042] It should be understood that, in the exemplary embodiments of this application, when a layer or element is referred to as being on another layer or substrate, it may mean that the layer or element is directly on another layer or substrate, or that there is an intermediate layer between the layer or element and another layer or substrate. "A and B are set in the same layer" means that after A and B use the same film deposition process to form a film layer for forming a specific pattern, they form a layer structure using the same photomask through a single patterning process.
[0043] In this application, modulation can be understood as adjustment.
[0044] This application provides a display module, including:
[0045] substrate1;
[0046] The light-emitting diode (LED) chip layer 3 is located on the substrate 1, and the LED chip layer 3 includes red LED chips, green LED chips and blue LED chips;
[0047] A secondary modulation layer 4 is located on the LED chip layer 3, and the secondary modulation layer 4 is used to modulate the emission spectrum wavelength of the red LED chip at least.
[0048] The pre-processed red LED chip has a main wavelength of emission spectrum that is in the range of 600nm~610nm after being modulated by the secondary modulation layer 4.
[0049] Optionally, it further includes a driving layer 2 located between the substrate 1 and the LED chip layer 3, the driving layer 2 being used to modulate the relative intensity of the emission spectra of the red LED chip, the green LED chip and the blue LED chip.
[0050] like Figure 1 As shown, Figure 1This is a structural diagram of the display module provided in an embodiment of this application. Figure 1 As shown, the display module includes: a substrate 1, a driving layer 2, an LED chip layer 3, and a secondary modulation layer 4. The substrate 1 can be a glass substrate, which supports the LED chip driving circuit and subsequent film layers. The driving layer 2 is a film layer deposited on the substrate 1. The driving layer 2 can adjust the relative intensity of the emission spectrum of the LED chips in the LED chip layer 3 (which can be understood as the brightness of the LED chips). The LED chip layer 3 includes LED chips, such as red, green, and blue LED chips; the dominant wavelength of the emission spectrum is primarily determined by the LED chips. The secondary modulation layer 4 (which can be understood as a light modulation layer) can be used to cut off or filter the emission spectrum wavelength of the LED chips. Before the display module is manufactured, the dominant wavelength and relative intensity of the emission spectrum of the LED chips can be designed. After the display module is manufactured, electronic devices can control the driving layer 2 and the secondary modulation layer 4 to fine-tune the relative intensity and wavelength of the emission spectrum, respectively. After adjusting the dominant wavelength of the emission spectrum of the red LED chip, the dominant wavelength of the emission spectrum of the red LED chip, after being adjusted by the spectral secondary modulation layer 4, is located in the range of 600nm~610nm. Furthermore, the electronic equipment can control the spectral secondary modulation layer 4 to cut off the emission spectrum wavelength of the red LED chip above 610nm. This combined front-end and back-end design and debugging operation complement each other, enabling the display module to achieve night vision compatibility, eliminate color shift, improve display effect, increase security, and allow for all-weather display without the need for separate switching. This display module is manufactured based on existing processes, which are low-difficulty and easy to mass-produce; it does not require additional LED chips, thus reducing costs.
[0051] Furthermore, it should be noted that the display module provided in this application embodiment can be applied to micro LED display modules and sub-millimeter LED display modules, as well as display modules using other novel self-emissive display technologies, and has universality.
[0052] The display module provided in this application includes: a substrate 1; an LED chip layer 3 located on the substrate 1, the LED chip layer 3 including red LED chips, green LED chips and blue LED chips; and a spectral secondary modulation layer 4 located on the LED chip layer 3, the spectral secondary modulation layer 4 being used at least to modulate the emission spectrum wavelength of the red LED chip to reduce the influence on radiance and radiance coordinates; wherein, after pre-processing, the main wavelength of the emission spectrum of the red LED chip is modulated by the spectral secondary modulation layer 4 and is located in the range of 600nm~610nm, which enables the display module to achieve night vision compatibility.
[0053] Optionally, the dominant wavelength of the emission spectrum of the green LED chip is located in the range of 520nm~526nm after being modulated by the secondary spectral modulation layer 4, and the dominant wavelength of the emission spectrum of the blue LED chip is located in the range of 445nm~455nm after being modulated by the secondary spectral modulation layer 4.
[0054] Clearly, adjusting the dominant wavelength of the emission spectrum of red (R-light) LED chips by electronic devices can reduce the radiance value of the display screen (which can be understood as reducing night vision noise) while preserving the red information visible to the human eye in the display module; adjusting the dominant wavelength of the emission spectrum of green (G-light) LED chips by electronic devices can compensate for the brightness of the display module; and adjusting the dominant wavelength of the emission spectrum of blue (B-light) LED chips by electronic devices can achieve white balance in the display module. The combined adjustment of the dominant wavelengths of the emission spectra of red, green, and blue LED chips by electronic devices results in a display module that meets the requirements for radiance brightness and radiance coordinates to achieve night vision compatibility. Adjusting the relative intensity of the emission spectra of red, green, and blue LED chips by electronic devices can optimize the brightness of the display module and achieve white balance.
[0055] Optionally, the relative intensity ratio of the emission spectra of the blue LED chip, the green LED chip, and the red LED chip is 10:8:5.
[0056] The optical verification results achieved after actual debugging in this application's embodiments meet night vision requirements, such as a color temperature of 10000-12000 K and a radiance of 1.47378*10. -9 W·m⁻²·sr⁻¹, radiance coordinates (0.15, 0.46), where the radiance coordinates can be understood as the chromaticity coordinates under the night vision compatibility index requirements, i.e., radiance chromaticity coordinates.
[0057] For example, such as Figure 2 As shown, Figure 2 This is a schematic diagram of RGB adjustment for a display module. Clearly, the horizontal axis represents the wavelength of the emitted spectrum, the vertical axis represents the relative intensity of the emitted spectrum, the dashed line represents the new spectrum after adjustment, and the solid line represents the normal spectrum. The dashed line in the diagram represents the 610nm wavelength of the emitted spectrum from the red LED chip. Figure 2As shown, in some scenarios, electronic devices can reduce the dominant wavelength of the emission spectrum of red LED chips from above 625nm to below 610nm, or cut off the emission spectrum wavelengths of red LED chips above 610nm, while keeping the dominant wavelengths of the emission spectra of blue and green LED chips unchanged. Electronic devices can adjust the relative intensity of the emission spectrum (which can be understood as the mixing ratio) according to actual needs, such as reducing the relative intensity of the emission spectrum of red LED chips while adjusting the relative intensity of the emission spectra of blue and green LED chips to the maximum. In this embodiment, the emission spectrum wavelengths of red LED chips below 600nm are not specially processed. Generally, the dominant wavelength of the emission spectrum of red LED chips is 635nm. This embodiment needs to adjust the dominant wavelength of the emission spectrum of red LED chips to below 610nm, which could be 605nm. There is no specific quantification value, only a boundary value, to prepare for the subsequent truncation. Cutting off the emission spectrum wavelengths of red LED chips above 610nm can reduce the impact of radiance and radiance coordinates (which can be understood as reducing night vision noise). The relative intensity of the emission spectra of the blue and green LED chips can be maximized to compensate for the brightness of the display module, bringing the radiance and radiance coordinates back to the target values. As mentioned earlier, the dominant wavelength of the red LED chip's emission spectrum is reduced and shifted to the left. During this shift, to ensure better subsequent cutoff, the electronic device can slightly reduce the relative intensity of the red LED chip's emission spectrum, achieving normal color mixing and clear visual visibility; alternatively, it can maintain the relative intensity of the red LED chip's emission spectrum without reducing its position, only shifting its position to the left. The electronic device can then perform RGB color mixing on the recalibrated emission spectrum to achieve radiance and chromaticity requirements compatible with night vision. After specific calibration, the dominant wavelength of the blue LED chip's emission spectrum is located in the range of 445nm~455nm, inclusive; the dominant wavelength of the green LED chip's emission spectrum is located in the range of 520nm~526nm, inclusive; and the dominant wavelength of the red LED chip's emission spectrum is located in the range of 600nm~610nm, inclusive. The relative intensity ratio of the emission spectra of the blue, green, and red LED chips is approximately 10:8:5.
[0058] For example, such as Figure 3 As shown, Figure 3 This is a schematic diagram of RGB adjustment for a display module. Clearly, the horizontal axis represents the wavelength of the emitted spectrum, and the vertical axis represents the relative intensity of the emitted spectrum. The dashed line represents the new spectrum after adjustment, and the solid line represents the normal spectrum. The solid line in the diagram represents the wavelength of the red LED chip's emission spectrum at 610nm. Figure 3As shown, in some scenarios, electronic devices can reduce the dominant wavelength of the emission spectrum of red LED chips from above 625nm to below 625nm, and can cut off the emission spectrum wavelength of red LED chips above 610nm. Electronic devices can also shift the dominant wavelengths of the emission spectra of red, blue, and green LED chips to the left accordingly. Electronic devices can reduce the relative intensity of the emission spectra of red, blue, and green LED chips based on their dominant wavelengths. Electronic devices can perform RGB color mixing processing based on the light modulation layer to achieve night vision compatibility. In this embodiment, the electronic device can shift the dominant wavelength of the emission spectrum of red LED chips to the left, and can correspondingly match and adjust the dominant wavelengths and relative intensities of the emission spectra of blue and green LED chips to reduce color shift in the display module. It should be noted that the light modulation layer can selectively filter out wavelengths of the emission spectrum that affect light intensity, retaining the necessary parts and removing the unnecessary parts.
[0059] For example, such as Figure 4 As shown, Figure 4 This is a schematic diagram of RGB adjustment for a display module. Clearly, the horizontal axis represents the wavelength of the emitted spectrum, and the vertical axis represents the relative intensity of the emitted spectrum. The dashed line represents the new spectrum after adjustment, and the solid line represents the normal spectrum. The boxed area represents the emission wavelength range above 610nm from the red LED chip. Figure 4 As shown, in some scenarios, electronic devices can filter out the emission spectrum wavelengths of red LED chips above 610nm. They can also adjust the emission spectrum wavelengths of blue and green LED chips accordingly based on the dominant wavelength of the red LED chip's emission spectrum. This adjustment is made according to the actual situation. For example, the electronic device can filter out emission spectrum wavelengths above 610nm from red LED chips, above 540nm from green LED chips, and above 460nm from blue LED chips, etc. Various combinations are possible, determined based on the final color mixing effect. The electronic device modulates the dominant wavelengths of the RGB emission spectra separately according to night vision compatibility requirements, enabling the display module to achieve white balance after color mixing. In this embodiment, the boxed portion represents the portion of the RGB emission spectrum wavelengths filtered out through light modulation (emission spectrum wavelengths above 610nm from red LED chips), preventing this portion of light from being emitted. The filtering mentioned in this embodiment is no different from the aforementioned cutoff; only the wording differs. It should be noted that light modulation has two functions: one is to filter out the wavelengths of the emitted spectrum, and the other is to affect the light intensity output ratio, which in turn creates a good display effect after the light is mixed.
[0060] For example, such as Figure 5 As shown, Figure 5 This is a schematic diagram of RGB adjustment for a display module. Clearly, the horizontal axis represents the wavelength of the emitted spectrum, and the vertical axis represents the relative intensity of the emitted spectrum. The dashed line represents the new spectrum after adjustment, and the solid line represents the normal spectrum. The solid line in the diagram represents the wavelength of the red LED chip's emission spectrum at 610nm. Figure 5 As shown, in some scenarios, the emission spectra of the red, blue, and green LED chips remain unchanged. The electronic device reduces the dominant wavelength and relative intensity of the emission spectra of the red, blue, and green LED chips, specifying that the dominant wavelength of the red LED chip's emission spectrum is within the range of 600nm-610nm. Wavelengths of the red LED chip's emission spectrum above 610nm are not emitted after optical modulation. The electronic device correspondingly reduces the emission wavelengths of the blue and green LED chips. The electronic device adjusts the dominant wavelength and relative intensity of the emission spectra of the red, blue, and green LED chips to meet the designed LED chip requirements and achieve the final night vision compatibility. In this embodiment, the electronic device adjusts the red, blue, and green LED chips according to the actual situation. Figure 5 The red line marks the point where the emission spectrum of the red LED chip reaches 610nm.
[0061] like Figure 6 As shown, Figure 6 This is a flowchart of a method for manufacturing a display module. For example... Figure 6 As shown in the embodiments of this application, a method for manufacturing a display module is also provided, for fabricating the display module as described above, the method comprising:
[0062] Step 101: Form substrate 1;
[0063] Step 102: An LED chip layer 3 is formed on the substrate 1, the LED chip layer 3 including a red LED chip, a green LED chip and a blue LED chip;
[0064] Step 103: Form a secondary spectral modulation layer 4 on the LED chip layer 3. The secondary spectral modulation layer 4 is used at least to modulate the emission spectral wavelength of the red LED chip.
[0065] The pre-processed red LED chip has a main wavelength of emission spectrum that is in the range of 600nm~610nm after being modulated by the secondary modulation layer 4.
[0066] Optionally, the method further includes:
[0067] A driving layer 2 is formed between the substrate 1 and the LED chip layer 3. The driving layer 2 is used to modulate the relative intensity of the emission spectra of the red LED chip, the green LED chip and the blue LED chip.
[0068] It is understood that the display module prepared based on the method for preparing the display module provided in the embodiments of this application can achieve the beneficial effects brought about by the display module in the foregoing embodiments, and will not be repeated here.
[0069] like Figure 7 As shown, Figure 7 This is a flowchart of a night vision compatible method. For example... Figure 7 As shown in the embodiments of this application, a night vision compatible method is also provided, which applies the display module described above. The method includes:
[0070] Step 201: Modulate the emission spectrum wavelength of the red LED chip in the LED chip layer 3 using the spectral secondary modulation layer 4;
[0071] The pre-processed red LED chip has a main wavelength of emission spectrum that is in the range of 600nm~610nm after being modulated by the secondary modulation layer 4.
[0072] Optionally, the method further includes:
[0073] The emission spectrum of the green LED chip in the LED chip layer 3 is modulated to the range of 520nm~526nm using the spectral secondary modulation layer 4.
[0074] The emission spectrum of the blue LED chip in the LED chip layer 3 is modulated to the range of 445nm~455nm using the spectral secondary modulation layer 4.
[0075] Optionally, the method further includes:
[0076] The relative intensity of the emission spectra of the red LED chip, green LED chip and blue LED chip in the LED chip layer 3 is modulated by the driving layer 2.
[0077] Obviously, the night vision compatibility method provided in this application embodiment can enable the display module to achieve night vision compatibility function, and can enable the display module to achieve no color shift and achieve white balance, thereby improving the display effect of the display module, which will not be elaborated here.
[0078] This application also provides a display device, including the display module described above. Obviously, the display device provided in this application also has the beneficial effects of the display module provided in this application, which will not be elaborated further here.
[0079] In addition, the following points need to be explained:
[0080] (1) The accompanying drawings of the embodiments of this application only involve the structures involved in the embodiments of this application. Other structures can be referred to the general design.
[0081] (2) For clarity, the thickness of layers or regions in the drawings used to describe embodiments of this application is enlarged or reduced, i.e., these drawings are not drawn to actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.
[0082] (3) Where there is no conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments.
[0083] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. The scope of protection of this application shall be determined by the scope of the claims.
Claims
1. A display module, characterized in that, include: substrate; A light-emitting diode (LED) chip layer is located on the substrate, the LED chip layer including red LED chips, green LED chips and blue LED chips; A secondary modulation layer located on the LED chip layer, the secondary modulation layer being used at least to modulate the emission spectrum wavelength of the red LED chip; The pre-processed red LED chip has a main emission wavelength in the range of 600nm to 610nm after being modulated by the secondary modulation layer.
2. The display module according to claim 1, characterized in that, The dominant wavelength of the emission spectrum of the green LED chip is located in the range of 520nm~526nm after being modulated by the secondary modulation layer, and the dominant wavelength of the emission spectrum of the blue LED chip is located in the range of 445nm~455nm after being modulated by the secondary modulation layer.
3. The display module according to claim 1, characterized in that, Also includes: A driving layer located between the substrate and the LED chip layer is used to modulate the relative intensity of the emission spectra of the red LED chip, the green LED chip and the blue LED chip.
4. The display module according to claim 1, characterized in that, The relative intensity ratio of the emission spectra of the blue LED chip, the green LED chip, and the red LED chip is 10:8:
5.
5. A method for manufacturing a display module, characterized in that, The method for manufacturing a display module as described in any one of claims 1-4 includes: Forming a substrate; An LED chip layer is formed on the substrate, the LED chip layer including red LED chips, green LED chips and blue LED chips; A secondary modulation layer is formed on the LED chip layer, and the secondary modulation layer is used to modulate the emission spectrum wavelength of the red LED chip at least. The pre-processed red LED chip has a main emission wavelength in the range of 600nm to 610nm after being modulated by the secondary modulation layer.
6. The method for manufacturing a display module according to claim 5, characterized in that, The method further includes: A driving layer is formed between the substrate and the LED chip layer, the driving layer being used to modulate the relative intensity of the emission spectra of the red LED chip, the green LED chip and the blue LED chip.
7. A night vision compatible method, characterized in that, The method of using the display module as described in any one of claims 1-4 includes: The emission spectrum wavelength of the red LED chip in the LED chip layer is modulated at least by using a spectral secondary modulation layer. The pre-processed red LED chip has a main emission wavelength in the range of 600nm to 610nm after being modulated by the secondary modulation layer.
8. The night vision compatible method according to claim 7, characterized in that, The method further includes: The emission spectrum of the green LED chip in the LED chip layer is modulated to the range of 520nm~526nm using the spectral secondary modulation layer. The emission spectrum of the blue LED chip in the LED chip layer is modulated to the range of 445nm~455nm using the spectral secondary modulation layer.
9. The method according to claim 7, characterized in that, The method further includes: The relative intensity of the emission spectra of the red, green, and blue LED chips in the LED chip layer is modulated using a driving layer.
10. A display device, characterized in that, Includes the display module as described in any one of claims 1-4.