Display module and display device
Patent Information
- Application Number
- PCT/CN2026/082247
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-03-28
- Filing Date
- 2026-03-09
- Publication Date
- 2026-10-01
Smart Images
Figure CN2026082247_01102026_PF_FP_ABST
Abstract
Description
A display module and a display device
[0001] Cross-references to related applications
[0002] This application claims priority to Chinese Patent Application No. 202510387984.1, filed on March 28, 2025, entitled "A Display Module and Display Device", the entire contents of which are incorporated herein by reference. Technical Field
[0003] This application relates to the field of display technology, and more particularly to a display module and a display device. Background Technology
[0004] With the widespread use of display devices in daily life, display technology has become an indispensable and important component of modern display devices. Whether it's smartphones, televisions, tablets, or computer monitors, the technological level of the display module directly affects the user's visual experience and the device's performance.
[0005] Currently, while mainstream display modules possess high color saturation and rich color reproduction capabilities, their display effects still differ somewhat from actual images under natural light. Although high-saturation color display can enhance the visual impact of an image, compared to the real world under natural light, color reproduction often lacks accuracy and struggles to accurately reproduce the color and light variations found in nature. This issue, especially during prolonged use of display devices, can lead to visual fatigue and even eye discomfort. Summary of the Invention
[0006] This application provides a display module and a display device to improve the visual comfort of the display module and reduce eye fatigue caused by prolonged use of the display device.
[0007] In a first aspect, this application provides a display module, which may include multiple light sources; at least one of the multiple light sources may include: a light-emitting device and a phosphor layer located on the light-emitting side of the light-emitting device. The dominant wavelength of the light-emitting device may be in the range of 430nm to 465nm. The phosphor layer may include a first phosphor, a second phosphor, and a third phosphor; the peak wavelength of the first phosphor may be between 580nm and 660nm, the peak wavelength of the second phosphor may be between 480nm and 590nm, and the peak wavelength of the third phosphor may be between 680nm and 780nm. For example, the peak wavelength of the light emitted by the second phosphor may be between 480nm and 590nm; for example, the peak wavelength of the light emitted by the second phosphor may be between 520nm and 580nm; or, the peak wavelength of the light emitted by the second phosphor may be between 520nm and 590nm; or, the peak wavelength of the light emitted by the second phosphor may be between 480nm and 580nm. The peak wavelength of the light emitted by the third phosphor may be between 700nm and 720nm.
[0008] The display module provided in this application, by setting a phosphor layer on the light-emitting side of the light-emitting device, contains a first phosphor, a second phosphor, and a third phosphor. The first phosphor, the second phosphor, and the third phosphor can emit light of corresponding wavelengths when excited by the light emitted from the light-emitting device. The light emitted by the phosphor layer under excitation is combined with the light emitted by the light-emitting device, which can make the spectral characteristics of the light emitted by the display module closer to the natural spectrum, improve the naturalness and realism of the display effect, make the display screen of the display module more in line with the color perception of the human eye, improve the display effect of the display module, and also effectively improve visual comfort and reduce eye fatigue.
[0009] In one possible implementation, the first phosphor accounts for 20% to 40% of the mass of the fluorescent layer, the second phosphor accounts for 25% to 45%, and the third phosphor accounts for 15% to 30%. Furthermore, the fluorescent layer may contain other components, with the total mass percentage of the first, second, and third phosphors and other components being 100%. In practical implementation, the proportion of different colors of light in the light source can be adjusted by reasonably setting the mass ratio of each phosphor in the fluorescent layer, so that the spectral characteristics of the emitted light from the light source are closer to the natural spectrum.
[0010] Using the phosphor layer with the above ratio allows the display module to more accurately reproduce the color performance under natural light, providing a more realistic color presentation and further improving visual comfort.
[0011] In one possible implementation, the composition of the first phosphor can be K2SiF6:Mn. 4+The second phosphor can be composed of Si6(Al2O2N6):Eu 2+ The third phosphor can be composed of (Na4)Si6O 12 :Mn 4+ or CaAlSiN3:Eu 2+ In practice, the specific materials of each phosphor in the fluorescent layer can be reasonably set according to actual needs; no restrictions are imposed here.
[0012] The first, second, and third phosphors mentioned above can emit light of corresponding wavelengths when excited by the light emitted from the light-emitting device, making the spectral characteristics of the light emitted by the display module closer to the natural spectrum.
[0013] In one possible implementation, at least one light source may further include: a packaging bracket, with the light-emitting device located inside the packaging bracket, and a fluorescent layer that can cover the surface and sides of the light-emitting device, so that the light emitted from the surface and sides of the light-emitting device can pass through the fluorescent layer, thereby improving the light extraction efficiency of the light source.
[0014] In one possible implementation, the light emitted by multiple light sources has a continuous spectrum in the wavelength range of 380nm to 780nm. The light emitted by the display module has a continuous spectrum in the visible light band of 380nm to 780nm, and its spectral characteristics are close to those of natural light.
[0015] In one possible implementation, the relative spectral power of light emitted by multiple light sources in the wavelength range of 400nm to 780nm is greater than or equal to 20%, with a uniform spectral energy distribution that conforms to the spectral characteristics of natural light and closely approximates the radiation characteristics of light sources in the natural environment, thus accurately reproducing color performance under natural light. For example, the relative spectral power of light emitted by multiple light sources in the wavelength range of 400nm to 780nm is greater than or equal to 25%.
[0016] In one possible implementation, the light-emitting device is a light-emitting diode (LED) chip. For example, the light-emitting device can be a blue LED chip. The light-emitting device emits blue light, which illuminates the phosphor layer and excites the phosphors in the phosphor layer to emit light of the corresponding wavelength. In this embodiment, the first and third phosphors emit red light after being excited, and the second phosphor emits green light after being excited. The blue light emitted by the light-emitting device and the excited red and green light mix to form white light.
[0017] In one possible implementation, the display module may include: a liquid crystal display panel and a backlight module, wherein the liquid crystal display panel is located on the light-emitting side of the backlight module; the aforementioned multiple light sources may be located in the backlight module so that the backlight module provides the liquid crystal display panel with a backlight source that is spectrally continuous and uniform in the visible light band.
[0018] In one possible implementation, the liquid crystal display panel includes a color filter layer, which may include at least three color filters that allow light of the corresponding color to pass through. In the display module, white light emitted from the backlight module shines onto the liquid crystal display panel. The color filters in the color filter layer of the liquid crystal display panel can select light of different specific wavelengths, allowing each sub-pixel in the liquid crystal display panel to display only its corresponding color. After the white light emitted from the backlight module passes through the color filter layer in the liquid crystal display panel, color display can be achieved.
[0019] In specific settings, the backlight module can be side-lit or direct-lit. The type of backlight module can be set reasonably according to actual needs.
[0020] In this embodiment, a liquid crystal display module is used as an example for illustration. In addition, the display module in this embodiment can also be an organic electroluminescent display module or other types of display modules. When the display module is other types of display modules, the implementation can be carried out with reference to the above description of the liquid crystal display module. Repeated parts will not be described again.
[0021] Secondly, this application provides a display device, which may include a processor and a display module. The processor is electrically connected to the display module, and the display module may be any of the display modules provided in the first aspect. The display device may be any type of electronic device, and the display module may be disposed on the front panel of the display device and may be designed in any shape. In actual implementation, the position, shape, size, etc. of the display module in the display device may be reasonably set according to actual needs.
[0022] The technical effects that can be achieved by the technical solution in the second aspect mentioned above can be described with reference to the technical effects that can be achieved by the technical solution in the first aspect mentioned above, and the repeated parts will not be repeated. Attached Figure Description
[0023] Figure 1 is a schematic diagram of the structure of the display device provided in an embodiment of this application;
[0024] Figure 2 is a schematic diagram of the structure of a light source provided in an embodiment of this application;
[0025] Figure 3 shows the spectral distribution of sunlight;
[0026] Figure 4 is a relative spectral power distribution diagram of light emitted by a backlight module provided in an embodiment of this application;
[0027] Figure 5 is a relative spectral power distribution diagram of the light emitted by another backlight module provided in an embodiment of this application;
[0028] Figure 6 is a relative spectral power distribution diagram of the light emitted by another backlight module provided in an embodiment of this application;
[0029] Figure 7 is a relative spectral power distribution diagram of the light emitted by another backlight module provided in an embodiment of this application;
[0030] Figure 8 is a relative spectral power distribution diagram of light emitted by another backlight module provided in an embodiment of this application;
[0031] Figure 9 is a relative spectral power distribution diagram of the light emitted by another backlight module provided in an embodiment of this application;
[0032] Figure 10 is a relative spectral power distribution diagram of light emitted by another backlight module provided in an embodiment of this application;
[0033] Figure 11 is a relative spectral power distribution diagram of the light emitted by another backlight module provided in an embodiment of this application;
[0034] Figure 12 is a schematic diagram of the structure of a display module provided in an embodiment of this application;
[0035] Figure 13 is a schematic diagram of a backlight module provided in an embodiment of this application;
[0036] Figure 14 is a schematic diagram of another display module provided in an embodiment of this application.
[0037] Reference numerals: 10-Display device; 110-Housing; 120-Processor; 130-Display module; 200-Light source; 210-Packaging bracket; 220-Light-emitting device; 230-Adhesive layer; 240-Solder; 250-Lamp board; 260-Connecting wire; 270-Phosphor layer; 300-Display module; 310-Backlight module; 311-Lamp board; 312-Light guide plate; 313-Light source; 320-LCD panel; 321-Upper polarizer; 322-Lower polarizer; 323-Color filter layer; 324-LCD layer; 400-Display module; 410-Backlight module; 411-Lamp board; 412-Light source; 420-LCD panel; 421-Upper polarizer; 422-Lower polarizer; 423-Color filter layer; 424-LCD layer. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the embodiments of this application will be described in detail below with reference to the accompanying drawings. The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application.
[0039] In this application embodiment, "multiple" refers to two or more. Therefore, in this application embodiment, "multiple" can also be understood as "at least two". "At least one" can be understood as one or more, such as one, two, or more. For example, "including at least one" means including one, two, or more, and it does not limit which ones are included. For example, including at least one of A, B, and C, then it could include A, B, C, A and B, A and C, B and C, or A and B and C. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.
[0040] Unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, sequence, priority or importance of multiple objects.
[0041] To improve the display effect of the display module, effectively enhance visual comfort, meet users' needs for natural light perception, and reduce eye fatigue, this application provides a display module and a display device. The display module provided in this application can provide a light source with spectral characteristics close to natural light, presenting more realistic colors and effectively improving the display effect. This display module can be widely used in various application scenarios.
[0042] For example, the display module provided in this application embodiment can be applied to educational scenarios, such as primary and secondary schools, providing a more realistic and comfortable visual experience through a display effect closer to natural light, helping students reduce eye fatigue during long study sessions. The display module provided in this application embodiment can also be applied to real-world display scenarios, such as painting creation or art exhibitions. The near-natural light display module can accurately reproduce the colors of the artwork, ensuring that the colors presented on the screen are closer to the real objects, meeting the color needs of artists. The display module provided in this application embodiment can also be applied to printing display device scenarios, such as in printing equipment, ensuring that the printed colors on the paper are consistent with the colors seen by the naked eye, greatly improving the color accuracy and reliability of printed displays and reducing color difference problems. The display module provided in this application embodiment can also be applied to scenarios requiring eye protection, especially suitable for display environments with high requirements for spectral composition and eye protection effects, such as office, reading, or home entertainment devices used for extended periods, reducing the stimulation of blue light and other harmful spectra on the eyes and protecting visual health.
[0043] The display module provided in this application embodiment can be applied to various types of display devices. For example, it can be applied to mobile terminals such as mobile phones, tablets, laptops, handheld computers, and personal digital assistants (PDAs), as well as computer devices such as desktops, laptops, laptops, ultra-mobile personal computers (UMPCs), netbooks, and smart screens, and any display device with display function such as smart wearable devices and smart TVs.
[0044] Figure 1 is a schematic diagram of the structure of the display device provided in an embodiment of this application. The left side of Figure 1 is a top view of the display device, and the right side of Figure 1 is a schematic diagram of the internal structure of the display device. As shown in Figure 1, the display device 10 provided in this embodiment of the application may include: a housing 110, a processor 120, and a display module 130. The processor 120 and the display module 130 are located inside the housing 110. The display module 130 displays images under the control of the processor 120. The display module 130 can be connected to the processor 120 via a bus. The bus can transmit data between the processor 120 and the display module 130.
[0045] The processor 120 may include one or more processing cores. The processor 120 can connect to various parts of the entire display device 10 using various interfaces and lines. By running or executing instructions, programs, code sets or instruction sets stored in memory, and calling data stored in memory, the processor 120 performs various functions of the display device 10 and processes data.
[0046] Display module 130 is a display component used for displaying images. Display module 130 is usually located on the front panel of display device 10 and can be designed as a full screen, curved screen, irregular screen, dual-sided screen or foldable screen. It can also be designed as a combination of full screen and curved screen, or a combination of irregular screen and curved screen. This embodiment does not limit this.
[0047] Figure 1 illustrates the case of a mobile phone as the display device 10. When the display device 10 is another device, the position, shape, size, etc. of the display module 130 in the display device 10 can be reasonably set according to actual needs.
[0048] The following describes the display module 130 provided in the embodiments of this application. This display module may include multiple light sources. Figure 2 is a schematic diagram of one structure of a light source in an embodiment of this application. As shown in Figure 2, at least one light source 200 in the display module may include: a light-emitting device 220 and a phosphor layer 270 located on the light-emitting side of the light-emitting device 220. The dominant wavelength of the light emitted by the light-emitting device 220 is between 430nm and 465nm. The phosphor layer 270 may contain a first phosphor, a second phosphor, and a third phosphor. The peak wavelength of the light emitted by the first phosphor is between 580nm and 660nm; the peak wavelength of the light emitted by the second phosphor is between 480nm and 590nm. For example, the peak wavelength of the light emitted by the second phosphor may be between 520nm and 580nm, or between 520nm and 590nm, or between 480nm and 580nm. The peak wavelength of the light emitted by the third phosphor is between 680nm and 780nm. For example, the peak wavelength of the light emitted by the third phosphor can be between 700nm and 720nm. It should be noted that since the phosphor itself does not emit light, the first, second, and third phosphors in this embodiment can emit light of corresponding wavelengths when excited by the light emitted from the light-emitting device. The peak wavelength of the phosphor refers to the peak wavelength of the light emitted by the phosphor when excited.
[0049] In the display module provided in this application embodiment, a fluorescent layer is provided on the light-emitting side of the light-emitting device. The fluorescent layer contains a first phosphor, a second phosphor, and a third phosphor. The first phosphor, the second phosphor, and the third phosphor can emit light of corresponding wavelengths when excited by the light emitted from the light-emitting device. The light emitted by the fluorescent layer under excitation is combined with the light emitted by the light-emitting device, which can make the spectral characteristics of the light emitted by the display module closer to the natural spectrum, improve the naturalness and realism of the display effect, make the display screen of the display module more in line with the color perception of the human eye, improve the display effect of the display module, and effectively improve visual comfort and reduce eye fatigue, thereby providing users with a healthier and more natural visual experience.
[0050] In this embodiment, the dominant wavelength of the light emitted by the light-emitting device 220 is between 430nm and 465nm, meaning the light-emitting device 220 can emit blue light. Blue light has a shorter wavelength and higher energy, which can excite the phosphor to emit longer wavelengths such as red and green light. Under the excitation of the blue light emitted by the light-emitting device 220, the first phosphor can emit red light with a peak wavelength between 580nm and 660nm; the second phosphor can emit green light with a peak wavelength between 480nm and 590nm; and the third phosphor can emit red light with a peak wavelength between 680nm and 780nm. Thus, the blue light emitted by the light-emitting device 220, combined with the red and green light emitted by the excited phosphors, can produce a continuous spectrum of light emitted by the light source, providing the display module with a light source whose spectral characteristics are closer to the natural spectrum.
[0051] In practical implementation, the proportion of different colors of light in the light source can be adjusted by reasonably setting the mass ratio of each phosphor in the fluorescent layer 270, so that the spectral characteristics of the emitted light from the light source are closer to the natural spectrum. For example, the mass ratio (or proportion) of the first phosphor in the fluorescent layer 270 can be between 20% and 40%, the mass ratio of the second phosphor in the fluorescent layer 270 can be between 25% and 45%, and the mass ratio of the third phosphor in the fluorescent layer 270 can be between 15% and 30%. Furthermore, the fluorescent layer 270 may also contain other components, with the total mass ratio of the first phosphor, second phosphor, third phosphor, and other components being 100%.
[0052] In one possible implementation, the composition of the first phosphor can be K2SiF6:Mn. 4+ The second phosphor can be composed of Si6(Al2O2N6):Eu 2+ The third phosphor can be composed of (Na4)Si6O 12 :Mn 4+ or CaAlSiN3:Eu 2+ In practice, the specific materials of each phosphor in the fluorescent layer 270 can be reasonably set according to actual needs; no restrictions are imposed here.
[0053] Referring again to Figure 2, in some embodiments of this application, at least one light source 200 in the display module may further include: a packaging bracket 210, a light-emitting device 220 located within the packaging bracket 210, and a phosphor layer 270 covering the surface and sides of the light-emitting device 220. This allows light emitted from both the surface and sides of the light-emitting device 220 to pass through the phosphor layer 270, improving the light extraction efficiency of the light source.
[0054] In a specific configuration, the light-emitting device 220 can be fixed to the encapsulation bracket 210 via an adhesive layer 230. For example, the adhesive layer 230 can be an object such as glue that can fix the light-emitting device 220 to the encapsulation bracket 210. The encapsulation bracket 210 can be fixed to the lamp board 250 via solder 240. For example, the solder 240 can be an object such as solder paste that can fix the encapsulation bracket 210 to the lamp board 250. A conductive connecting wire 260 connects the light-emitting device 220 and the encapsulation bracket 210. For example, the connecting wire 260 can be a crystal wire.
[0055] The light-emitting device 220 shown in Figure 2 is mounted and fixed on the lamp board 250 using a standard package. In other embodiments, the light-emitting device 220 can also be mounted and fixed on the lamp board 250 using a flip-chip package. Standard package refers to mounting with the electrodes facing upwards (away from the lamp board), while flip-chip package refers to mounting with the electrodes facing downwards (closer to the lamp board). Exemplarily, the light-emitting device can be mounted using a standard printed-on-board (POB) package or a flip-chip POB package, fixing the light-emitting device to the printed circuit board (PCB) of the lamp board. The light-emitting device can also be mounted using a standard metal indium phosphide (MIP) package or a flip-chip MIP package. The light-emitting device can also be mounted using a standard chip-on-board (COB) package or a flip-chip COB package, mounting the light-emitting device onto the lamp board.
[0056] Through the above design, the light emitted by the display module provided in this application embodiment can have a continuous and uniform spectrum in the visible light band of 380nm to 780nm, and a relative spectral power of ≥20% in the wavelength band of 400nm to 780nm. Here, relative spectral power can also be called relative spectral power distribution. Different light sources radiate different spectral powers in different spectra, which can be described by spectral power distribution. Setting the maximum value of the spectral power distribution to 1, and normalizing the spectral power distribution, the normalized spectral power distribution can be called the relative spectral power distribution, i.e., relative spectral power.
[0057] Figure 3 shows a spectral power distribution diagram of sunlight. As shown in Figure 3, in the natural environment, the spectral distribution of sunlight is continuous, and its spectral radiance amplitude exhibits a stable rather than peaked characteristic in the visible light range. In other words, the solar spectrum has the following characteristics: the energy distribution of each band is relatively uniform, the spectrum is relatively smooth and balanced; the spectral energy distribution of different bands is uniform, without obvious peaks; and it is closer to the radiation characteristics of light sources in the natural environment.
[0058] Figures 4 to 11 show the relative spectral power distribution of the light emitted by the display module according to an embodiment of this application. Figures 4 to 11 show the relative spectral power distribution of the light emitted by the display module when the mass percentage of each phosphor in the phosphor layer of the light source is different (the mass percentage of each phosphor is within the mass percentage range provided in the embodiment of this application). Comparing the relative spectral power distribution shown in Figures 4 to 11 with the spectral power distribution shown in Figure 3, it can be clearly seen that the spectrum of the light emitted by the display module provided in this embodiment is similar to the spectrum of sunlight, which can achieve the effect of accurately reproducing the color performance under natural light. The display module provided in this embodiment can not only provide more realistic color presentation under different lighting environments, but also effectively improve visual comfort and reduce eye fatigue, thereby providing users with a healthier and more natural visual experience.
[0059] As shown in Figures 4 to 11, in some embodiments of this application, the light emitted by the light source has a continuous spectrum in the visible light band of wavelengths from 380 nm to 780 nm, and the relative spectral power of the light emitted by the light source in the wavelength range of 400 nm to 780 nm is greater than or equal to 20%. For example, the relative spectral power of the light emitted by the light source in the wavelength range of 400 nm to 780 nm can be greater than or equal to 25%. In other embodiments of this application, the light emitted by the light source has a continuous spectrum in the visible light band of wavelengths from 380 nm to 780 nm, and the relative spectral power of the light emitted by the light source in the wavelength range of 410 nm to 780 nm is greater than or equal to 20%. For example, the relative spectral power of the light emitted by the light source in the wavelength range of 410 nm to 780 nm can be greater than or equal to 25%. In some other embodiments of this application, the light emitted by the light source has a continuous spectrum in the visible light band of wavelength 380nm to 780nm, and the relative spectral power of the light emitted by the light source in the wavelength range of 425nm to 780nm is greater than or equal to 20%. For example, the relative spectral power of the light emitted by the light source in the wavelength range of 425nm to 780nm can be greater than or equal to 25%, the spectral energy distribution is uniform, which conforms to the spectral characteristics of natural light and is close to the radiation characteristics of the light source in the natural environment, so as to accurately reproduce the color performance under natural light.
[0060] In some embodiments of this application, the display module provided in this application can be a liquid crystal display module. Figure 12 shows a schematic diagram of the structure of a display module provided in an embodiment of this application. As shown in Figure 12, the liquid crystal display module may include a liquid crystal display panel 320 and a backlight module 310. The liquid crystal display panel 320 is located on the light-emitting side of the backlight module 310. The aforementioned multiple light sources may be located in the backlight module 310, so that the backlight module 310 provides the liquid crystal display panel 320 with a continuous and uniform backlight in the visible light band. The liquid crystal display panel 320 is provided with a color filter layer 323, which may include at least three color filters. Each color filter is used to allow light of the corresponding color to pass through. The backlight module 310 may include multiple light sources. After the white light emitted by the multiple light sources of the backlight module 310 passes through the different color filters of the color filter layer 323, a color image can be generated by the combination of different colors of light, thereby realizing color display.
[0061] Furthermore, in one possible implementation, continuing to refer to Figure 12, the backlight module 310 in this embodiment can be a side-lit type. The backlight module 310 may include a lamp board 311 and a light guide plate 312, with the lamp board 311 located on the side of the light guide plate 312. Figure 13 shows a schematic diagram of a lamp board structure provided in an embodiment of this application. As shown in Figures 12 and 13, the lamp board 311 may include multiple light sources 313, which may be located on the light guide plate 312. The light emitted from each light source 313 enters the light guide plate 312 from the side and provides a uniform surface light source after transmission through the light guide plate 312. The light-emitting device in each light source 313 may be a light-emitting diode (LED) chip. For example, the light-emitting device may be a blue LED chip. The light-emitting device emits blue light. When the blue light shines on the phosphor layer, it excites the phosphors in the phosphor layer to emit light of the corresponding wavelength. In this embodiment, the first and third phosphors emit red light after being excited, and the second phosphor emits green light after being excited. The blue light emitted by the light-emitting device and the excited red and green light mix to form white light. The backlight module 310 may include a reflective sheet. The side light emitted by the multiple light sources 313 is reflected by the reflective sheet and then shines onto the liquid crystal display panel 320 through the light guide plate 312, thereby providing a uniform backlight for the liquid crystal display panel 320.
[0062] The liquid crystal display panel 320 may include an upper polarizer 321, a lower polarizer 322, a color filter layer 323, and a liquid crystal layer 324, with the color filter layer 323 and the liquid crystal layer 324 located between the upper polarizer 321 and the lower polarizer 322. The upper polarizer 321 and the lower polarizer 322 filter light, allowing only polarized light of a specific direction to pass through. The light transmission directions of the upper polarizer 321 and the lower polarizer 322 are typically perpendicular. When no voltage is applied, the liquid crystal molecules in the liquid crystal layer 324 present a black screen state. When a voltage is applied, the arrangement of the liquid crystal molecules in the liquid crystal layer 324 changes, allowing light to pass through, thereby achieving image display. Furthermore, by controlling the deflection angle of the liquid crystal molecules, the liquid crystal layer 324 can adjust the transmittance of the light emitted by the backlight module, achieving changes in the brightness of the image colors. The color filter layer 323 may include at least three color filters. For example, the color filter layer 323 may include filter sections for three colors: red, green and blue. The filter section may also be called a color filter.
[0063] In the display module 300, white light emitted from the backlight module 310 is directed onto the liquid crystal display panel 320. Different color filters in the color filter layer 323 of the liquid crystal display panel 320 can select light of different specific wavelengths, allowing each sub-pixel in the liquid crystal display panel 320 to display only its corresponding color. After passing through the color filter layer 323 of the liquid crystal display panel 320, the white light emitted from the backlight module 310 still exhibits spectral continuity within the wavelength range of 380nm to 780nm, and a relative spectral power greater than or equal to 20% within the wavelength range of 400nm to 780nm.
[0064] In another possible implementation, the backlight module in this embodiment can be a direct-lit type. Figure 14 shows a schematic diagram of another display module provided in this embodiment. As shown in Figure 14, the display module 400 may include a backlight module 410 and a liquid crystal display panel 420. The backlight module 410 can be a direct-lit type, and the backlight module 410 may include a lamp board 411. The lamp board 411 may include multiple light sources 412, and the multiple light sources 412 may be located within the coverage area of the display area of the liquid crystal display panel. The light-emitting device in each light source 412 may be an LED chip. For example, the light-emitting device may be a blue LED chip. The light-emitting device emits blue light, which illuminates the phosphor layer and excites the phosphor in the phosphor layer to emit light of the corresponding wavelength. In this embodiment, the first phosphor and the third phosphor emit red light after being excited, and the second phosphor emits green light after being excited. The blue light emitted by the light-emitting device and the excited red and green light are mixed to form white light. The backlight module 410 may include a reflective sheet and a diffuser plate. The light emitted by multiple light sources 412 is reflected by the reflective sheet and then homogenized by the diffuser plate before illuminating the liquid crystal display panel 420, thereby providing a uniform backlight for the liquid crystal display panel 420.
[0065] The liquid crystal display panel 420 may include an upper polarizer 421, a lower polarizer 422, a color filter layer 423, and a liquid crystal layer 424, with the color filter layer 423 and the liquid crystal layer 424 located between the upper polarizer 421 and the lower polarizer 422. The color filter layer 423 may include filters for at least three colors. In the display module 400, white light emitted from the backlight module 410 is directed towards the liquid crystal display panel 420. The filters for different colors in the color filter layer 423 of the liquid crystal display panel 420 can select light of different specific wavelengths, allowing each sub-pixel in the liquid crystal display panel 420 to display only its corresponding color. After the white light emitted from the backlight module 410 passes through the color filter layer 423 in the liquid crystal display panel 420, color display can be achieved.
[0066] The above embodiments use a liquid crystal display module as an example for illustration. In addition, the display module in the embodiments of this application can also be an organic electroluminescent display module, such as an organic light-emitting diode (OLED) display module or other types of display modules. When the display module is other types of display modules, the implementation can be carried out with reference to the above description of the liquid crystal display module. Repeated parts will not be described again.
[0067] The display module provided in this application is a natural light spectrum display module. The spectral characteristics of the light emitted by the display module are close to those of natural light, which can accurately reproduce the color performance under natural light. This type of display module can not only provide more realistic color presentation under different lighting environments, but also effectively improve visual comfort and reduce eye fatigue, thereby providing consumers with a healthier and more natural visual experience.
[0068] It is understood that the numerical ranges described in the embodiments of this application all include endpoint values.
[0069] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made therein without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely illustrative examples of the solutions defined by the appended claims and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application.
[0070] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if these modifications and variations of the embodiments of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.
Claims
1. A display module, characterized in that, The display module includes multiple light sources; At least one of the plurality of light sources includes: a light-emitting device and a fluorescent layer, wherein the fluorescent layer is located on the light-emitting side of the light-emitting device; The main wavelength of the light-emitting device is in the range of 430nm to 465nm; The fluorescent layer contains a first phosphor, a second phosphor, and a third phosphor; The peak wavelength of the first phosphor is between 580nm and 660nm, the peak wavelength of the second phosphor is between 480nm and 590nm, and the peak wavelength of the third phosphor is between 680nm and 780nm.
2. The display module according to claim 1, characterized in that, The first phosphor accounts for 20% to 40% of the mass of the fluorescent layer, the second phosphor accounts for 25% to 45% of the mass of the fluorescent layer, and the third phosphor accounts for 15% to 30% of the mass of the fluorescent layer.
3. The display module as described in claim 2, characterized in that, The composition of the first phosphor is K2SiF6:Mn 4+ The second phosphor is composed of Si6(Al2O2N6):Eu 2+ The composition of the third phosphor is (Na4)Si6O 12 :Mn 4+ or CaAlSiN3:Eu 2+ .
4. The display module according to any one of claims 1 to 3, characterized in that, The at least one light source further includes: a packaging bracket; The light-emitting device is located inside the packaging bracket, and the fluorescent layer covers the surface and sides of the light-emitting device.
5. The display module according to any one of claims 1 to 4, characterized in that, The light emitted by the display module has a continuous spectrum in the wavelength range of 380nm to 780nm.
6. The display module according to claim 5, characterized in that, The relative spectral power of the light emitted by the multiple light sources in the wavelength range of 400nm to 780nm is greater than or equal to 20%.
7. The display module according to any one of claims 1 to 6, characterized in that, The light-emitting device is a light-emitting diode chip.
8. The display module according to any one of claims 1 to 7, characterized in that, The display module includes: a liquid crystal display panel and a backlight module, wherein the liquid crystal display panel is located on the light-emitting side of the backlight module; The multiple light sources are located in the backlight module.
9. The display module according to claim 8, characterized in that, The liquid crystal display panel is provided with a color filter layer, which includes at least three color filters for allowing light of the corresponding color to pass through.
10. A display device, characterized in that, The display device includes: a display module as described in any one of claims 1 to 9, and a processor; the display module is electrically connected to the processor.