Display device

Abstract

This application relates to a display device, including a display panel; a backlight module disposed on the light-incident side of the display panel for providing backlight to the display panel, the backlight module including multiple LEDs, each LED including a package bracket, a first blue light chip and a green light chip disposed within the package bracket, a second blue light chip, and a light conversion unit, the light conversion unit being disposed on the light-emitting side of the first blue light chip, the light conversion unit being used to convert a first light beam emitted by the first blue light chip into a second light beam; the second light beam has a different wavelength than the first light beam; wherein, the emission wavelength of the first blue light chip is smaller than the emission wavelength of the second blue light chip. Through the aforementioned limitation, the probability of the light beam converted by the light conversion unit mixing into the light beam when the green light chip or the second blue light chip emits light can be reduced, ensuring that the emitted light beam meets the preset target and reducing crosstalk.

Description

Technical Field

[0001] This application relates to the field of display device technology, and more particularly to a display device. Background Technology

[0002] Liquid crystal displays (LCDs) are widely used in televisions, monitors, and other fields due to their high performance and relatively low cost. LCDs themselves do not emit light and require a backlight module to provide a light source.

[0003] To achieve precise local dimming, the spacing between chips in the backlight module has been made smaller and smaller, and the mixing distance between chips has also been shortened accordingly. This causes a large amount of strong light emitted by the bright field chip to invade the area corresponding to its adjacent dark field. After being scattered by the optical film, this intruding light will illuminate the dark field area that should display pure black. Utility Model Content

[0004] This application provides a display device to solve the problem of beam crosstalk.

[0005] In a first aspect, this application provides a display device, comprising:

[0006] Display panel;

[0007] A backlight module, disposed on the light-incident side of the display panel, is used to provide backlight for the display panel. The backlight module includes a plurality of LEDs, the LEDs including:

[0008] Packaging bracket;

[0009] A first blue light chip, a green light chip, and a second blue light chip are disposed within the packaging bracket;

[0010] A light conversion unit is disposed on the light-emitting side of the first blue light chip. The light conversion unit is used to convert the first light beam emitted by the first blue light chip into a second light beam; the second light beam has a different wavelength from the first light beam.

[0011] The first blue light chip has a shorter emission wavelength than the second blue light chip.

[0012] In some embodiments, the green light chip is disposed between the second blue light chip and the first blue light chip.

[0013] In some embodiments, the light conversion unit is used to convert blue light into red light, and the light conversion unit is not located on the light-emitting side of the second blue light chip and the green light chip.

[0014] In some embodiments, the light conversion unit includes KSF phosphor;

[0015] The wavelength range of the first blue light chip includes 445nm-455nm.

[0016] And / or, the wavelength range of the second blue light chip includes 465nm-475nm.

[0017] In some embodiments, the LED chip further includes:

[0018] An isolation unit is disposed within the packaging bracket and between the first blue light chip and the green light chip, with the upper surface of the isolation unit in the height direction being higher than the position of the light conversion unit, for blocking at least a portion of the light beams emitted by the green light chip and the second blue light chip from reaching the light conversion unit.

[0019] In some embodiments, the packaging bracket, the first blue light chip, the green light chip, and the second blue light chip are all rectangular;

[0020] The long side of the first blue light chip, the green light chip, and the second blue light chip extends parallel to the short side of the packaging bracket, and the first blue light chip, the green light chip, and the second blue light chip are arranged along the long side of the packaging bracket.

[0021] In some embodiments, the isolation unit is connected to the inner wall of the encapsulation bracket, and the material of the light conversion unit fills the space formed by the isolation unit and the encapsulation bracket.

[0022] In some embodiments, the isolation unit is opaque and reflects light onto the surface of the first blue light chip.

[0023] In some embodiments, the LED chip further includes:

[0024] At least two light cups, with the first blue light chip and the second blue light chip respectively disposed in different light cups.

[0025] In some embodiments, it also includes:

[0026] Multiple driving circuits are provided, and the first blue light chip, the green light chip, and the second blue light chip in the same LED are electrically connected to different driving circuits.

[0027] The aforementioned display device can convert a first light beam into light beams of different wavelengths via a light conversion unit. By limiting the emission wavelength of the first blue light chip to be shorter than that of the second blue light chip, it is ensured that the excitation efficiency of the first blue light chip on the light conversion unit is higher than that of the emission wavelengths of the green and second blue light chips. Even if light leakage occurs in the light beams emitted by the green and second blue light chips and is incident on the light conversion unit, the conversion efficiency of the light conversion unit for the leaked light beam will be very low. This reduces the probability that the light beam converted by the light conversion unit will be mixed into the light beam emitted by the green or second blue light chip, ensuring that the emitted light beam meets the preset target and reducing the possibility of crosstalk and color shift. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0029] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device provided in some embodiments of this application;

[0030] Figure 2 Schematic diagrams of display devices provided in some embodiments of this application;

[0031] Figure 3 This is a schematic diagram of a backlight module provided in some embodiments of this application;

[0032] Figure 4 A schematic diagram of the LED beads provided in some embodiments of this application;

[0033] Figure 5 The excitation and emission spectra of potassium manganese fluorosilicate phosphor;

[0034] Figure 6 A schematic diagram of an LED chip provided in other embodiments of this application;

[0035] Figure 7 A schematic diagram of an LED chip provided in other embodiments of this application;

[0036] Figure 8 This is a schematic diagram of an LED chip provided in some other embodiments of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100: Control device; 200: Display device; 210: Display panel; 220: Backlight module; 2210: LED bead; 2211: Packaging bracket; 2212: First blue light chip; 2213: Green light chip; 2214: Second blue light chip; 2215: Light conversion unit; 2216: Isolation unit; 2217: Light cup; 300: Mobile terminal; 400: Server. Detailed Implementation

[0039] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0041] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0042] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0043] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0044] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that terms such as “comprising / including” or “having” specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or,” as used in this specification, includes any and all combinations of the associated listed items.

[0045] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0046] In this embodiment, the display device 200 generally refers to a device with screen display and data processing capabilities. For example, the display device 200 includes, but is not limited to, smart TVs, mobile terminals, computers, monitors, advertising screens, wearable devices, virtual reality devices, augmented reality devices, etc.

[0047] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device provided in some embodiments of this application. For example... Figure 1 As shown, users can operate the display device 200 via touch operation, mobile terminal 300, and control device 100. For example, control device 100 can be a remote control, stylus, gamepad, etc.

[0048] The mobile terminal 300 can function as a control device for human-computer interaction between the user and the display device 200. It can also function as a communication device for establishing a communication connection with the display device 200 and exchanging data. In some embodiments, the mobile terminal 300 can have software applications installed on it and communicate with the display device 200 via network communication protocols to achieve one-to-one control and data communication. Furthermore, it can transmit audio and video content displayed on the mobile terminal 300 to the display device 200 for synchronized display.

[0049] like Figure 1 The diagram also shows that the display device 200 communicates with the server 400 via various communication methods. This allows the display device 200 to communicate via a local area network (LAN), a wireless local area network (WLAN), and other networks.

[0050] Display device 200 can provide broadcast television reception function, and can also be equipped with intelligent network television function that provides computer support function, including but not limited to network television, smart television, Internet Protocol television (IPTV), etc.

[0051] This application provides a display device 200, see reference. Figure 2 The display device 200 includes a display panel 210 and a backlight module 220.

[0052] Understandably, the display panel 210 itself does not possess light-emitting capability and must rely on the uniform light source provided by the backlight module 220. The light transmission or blocking is controlled by the light modulation structure within the display panel 210 to achieve the presentation of a color image. More specifically, the display panel 210 forms an image by controlling the light transmittance and color of each pixel. If the light emitted by a pixel is not completely confined to its corresponding display area but diffuses into the dark field of adjacent pixels, it will cause other colors to appear around areas that were originally black. Therefore, it is necessary to limit crosstalk of the light beam and reduce color shift.

[0053] Display panel 210 can be a display product such as an LCD screen, LCD monitor, or instrument panel. Display panel 210 is configured to display images.

[0054] A backlight module 220 is disposed on the light-incident side of the display panel 210 and is used to provide backlight for the display panel 210. The backlight module 220 can emit light uniformly across the entire light-emitting surface, providing uniform light to the light-incident side of the display panel 210, so that the light transmitted through each liquid crystal cell forms a uniform display image. The backlight module 220 includes multiple LEDs 2210, such as... Figure 3 As shown, Figure 3 This is a top view of the backlight module 220. The LED chip 2210 includes a packaging bracket 2211, a first blue LED chip 2212, a green LED chip 2213, and a second blue LED chip 2214 disposed within the packaging bracket 2211, and a light conversion unit 2215, as shown below. Figure 4 As shown, Figure 4 The diagram shown is a schematic of a lamp bead with the vertical plane of the light-emitting side of the first blue light chip as the cross-section.

[0055] The light conversion unit 2215 is disposed on the light-emitting side of the first blue light chip 2212. The light conversion unit 2215 is used to convert the first light beam emitted by the first blue light chip 2212 into a second light beam; the second light beam has a different wavelength from the first light beam.

[0056] The first blue light chip 2212 emits light at a wavelength shorter than the second blue light chip 2214.

[0057] The emitting side is the main propagation direction of the first light beam, where the light intensity is strongest and the directionality is most concentrated. Placing the light conversion unit 2215 on the emitting side of the first blue light chip 2212 allows the first light beam to be incident on the light conversion unit 2215 with maximum efficiency, reducing light loss due to path deviation. If the light conversion unit 2215 is far from the emitting side of the first blue light chip 2212, the first light beam may be mixed with ambient light or light from other light sources during propagation, causing the light conversion unit 2215 to absorb non-target light, thus affecting the purity of the second light beam. By placing the light conversion unit 2215 on the emitting side, the first light beam can be directly incident with the shortest path, reducing stray light mixing. The first blue light chip 2212, green light chip 2213, and second blue light chip 2214 can be mounted upright or inverted in the packaging bracket, as long as their emitting sides are consistent; no restrictions are imposed here.

[0058] It is understandable that the wavelength of light is inversely proportional to its energy; that is, the shorter the wavelength, the higher the photon energy, and the longer the wavelength, the lower the photon energy. The light conversion unit 2215 needs to absorb photons with sufficient energy to drive internal electron transitions and release light of the target wavelength. By limiting the emission wavelength of the first blue light chip 2212 to be shorter than that of the second blue light chip 2214, it is possible not only to ensure that the energy of the first beam emitted by the first blue light chip 2212 meets the energy requirements of the material in the light conversion unit 2215, thus ensuring the conversion of the first beam by the light conversion unit 2215, but also to reduce the conversion of the beam emitted by the second blue light chip 2214 by the light conversion unit 2215.

[0059] Furthermore, it is understandable that the first beam emitted by the first blue light chip 2212 is not a pure single wavelength, but rather centered on the main peak wavelength, accompanied by a small amount of stray light. If the first beam is used directly, the stray light will cause the displayed colors to appear grayish and the color accuracy to decrease. The light conversion unit 2215 can specifically absorb the main peak wavelength of the first beam, while the stray light naturally attenuates because it is not absorbed, thereby reducing the proportion of stray light in the second beam and ensuring the purity of colors in the displayed image.

[0060] The aforementioned display device can convert a first light beam into light beams of different wavelengths via the light conversion unit 2215. By limiting the emission wavelength of the first blue light chip 2212 to be smaller than that of the second blue light chip 2214, it can be ensured that the excitation efficiency of the first blue light chip 2212 on the light conversion unit 2215 is higher than that of the emission wavelengths of the green light chip 2213 and the second blue light chip 2214 on the light conversion unit. Even if light leakage occurs in the light beams emitted by the green light chip 2213 and the second blue light chip 2214 and is incident on the light conversion unit 2215, the conversion efficiency of the light conversion unit 2215 for the leaked light beam will be very low. This reduces the probability that the light beams emitted by the green light chip 2213 or the second blue light chip 2214 will be mixed with the light beams converted by the light conversion unit 2215, ensuring that the emitted light beams meet the preset target and reducing the possibility of crosstalk and light color shift.

[0061] In some embodiments, the green light chip 2213 is disposed between the first blue light chip 2212 and the second blue light chip 2214.

[0062] Since the wavelength range of green light is generally 500nm-570nm, while the wavelength of blue light is generally less than 500nm, as mentioned earlier, the longer the wavelength, the lower the photon energy. Compared to the second blue light chip 2214, the light beam leaking from the green light chip 2213 has a lower excitation efficiency for the light conversion unit 2215. Placing the green light chip 2213 between the first blue light chip 2212 and the second blue light chip 2214 can move the second blue light chip 2214 away from the light conversion unit 2215, further reducing the excitation efficiency of the light conversion unit 2215 by the light beam leaking from the second blue light chip 2214.

[0063] In some embodiments, the light conversion unit 2215 is used to convert blue light into red light, and the light conversion unit 2215 is not located on the light-emitting side of the green light chip 2213 and the second blue light chip 2214.

[0064] Because the core light-emitting layer of the red chip is made of AlGaInP quaternary alloy semiconductor material, increased temperature can activate a large number of nonradiative recombination centers in the AlGaInP semiconductor material, exacerbating carrier leakage and Auger recombination. This leads to a sharp drop in internal quantum efficiency (IQE), resulting in a decrease in red light brightness. A large amount of electrical energy is no longer converted into light energy but is dissipated as heat. Simultaneously, increased temperature worsens the inherent droop effect, creating a vicious cycle of heat generation → reduced efficiency → increased current → even more heat → even lower efficiency. The brightness decay of the red chip disrupts the red-green-blue light mixing balance, requiring a simultaneous reduction in the brightness of other chips to match the decayed red light, thus causing an overall decrease in white field brightness. Furthermore, the brightness decay of the red chip, combined with the droop effect, further leads to insufficient peak brightness. Furthermore, the bandgap of AlGaInP semiconductor material decreases significantly with increasing temperature. This reduction in bandgap directly leads to a shift in the emission wavelength towards longer wavelengths (i.e., redshift). This wavelength shift disrupts the color coordinate matching of the RGB primary colors, causing severe color distortion.

[0065] To address the high-temperature issues caused by the aforementioned red light chip, this application employs a first blue light chip 2212 and a light conversion unit 2215 working together to output red light. The light conversion unit 2215 can be at least one of red phosphor and red quantum dots. The core principle of light beam conversion by phosphors and quantum dots is the transfer and conversion of photon energy. Phosphors rely on the fixed energy level transitions of activated ions in a crystal field, with color determined by the type of ions and the matrix, making them suitable for low-cost, high-stability general applications. Quantum dots, on the other hand, rely on the quantum confinement effect caused by their nanoscale size, allowing for continuously adjustable color with high color purity, making them more suitable for applications requiring high color accuracy. The material of the light conversion unit 2215 can be selected according to specific needs and is not limited here.

[0066] It is understandable that light excitation is an energy transfer process. Compared to green light chips, blue light chips produce photons with greater energy and higher conversion efficiency. By using the first blue light chip 2212 in conjunction with the light conversion unit 2215, not only can red light be generated efficiently, but the brightness decay rate can also be reduced, the possibility of insufficient white field and peak brightness can be decreased, and color shift can be reduced.

[0067] By limiting the light conversion unit 2215 to not being located on the light-emitting side of the green light chip 2213 and the second blue light chip 2214, the possibility of the light beams emitted by the green light chip 2213 and the second blue light chip 2214 reaching the light conversion unit 2215 can be reduced, thereby reducing beam crosstalk.

[0068] In some embodiments, the light conversion unit 2215 includes KSF phosphor (potassium manganese fluorosilicate phosphor, K2SiF6:Mn). 4+ The wavelength range of the first blue light chip includes 445nm-455nm. In other embodiments, the wavelength range of the second blue light chip includes 465nm-475nm. Figure 5 This provides the excitation and emission spectra of KSF phosphors, where Wavelength represents wavelength, Relative Units represent relative units, Excitation represents excitation, Emission represents emission, and Spectra represent the spectrum. Figure 5 As shown, the excitation spectrum of KSF phosphor exhibits two strong absorption peaks. One peak is less than 400 nm, outside the blue light band, while the other peak is located in the 445 nm to 455 nm band. Within this band, the blue light emitted by the blue LED chip can be efficiently absorbed by the KSF phosphor with extremely low energy loss. The emission spectrum of KSF phosphor reveals that after absorbing blue light, it emits a narrow half-width (HWHM) red spectrum, concentrated in the 630-650 nm range, producing pure red light. A narrower HWHM results in a more concentrated spectrum and more saturated color. KSF phosphor has an extremely narrow HWHM, and its emission peak wavelength can be precisely controlled within the range where the human eye is most sensitive to red light. Therefore, it can produce highly saturated and bright red light without relying on high current to increase brightness, indirectly reducing device power and heat generation.

[0069] The wavelength 465nm-475nm falls within the non-peak range of the excitation spectrum of KSF phosphor, which is related to the Mn content in KSF phosphor. 4+ The energy required for the dd transition of the ion is mismatched and cannot satisfy the Mn requirement. 4+ The energy threshold required for ion transitions is reduced, thereby decreasing the excitation of KSF by the second blue light chip.

[0070] It is understandable that when a light-emitting chip emits light, some of the beam will be scattered to other areas. For example, if only the second blue light chip 2214 emits blue light, some blue light will be scattered to the light conversion unit 2215. The KSF phosphor will convert the incident blue light into red light, which will mix into the blue beam emitted by the second blue light chip 2214, causing the blue light to be distorted and its purity to decrease. If the wavelength of the beam emitted by the second blue light chip 2214 is in the 445nm-455nm band, the amount of red light mixed into the blue beam will be further increased, causing the blue beam to turn purplish. However, setting the wavelength of the beam emitted by the second blue light chip 2214 in the 465nm-475nm band can reduce the amount of red light mixed into the blue beam, improve the purity of the blue beam, and further reduce the crosstalk of red light to blue light.

[0071] In some embodiments, the LED 2210 also includes an isolation unit 2216.

[0072] An isolation unit 2216 is disposed within the packaging bracket 2211 and between the first blue light chip 2212 and the green light chip 2213. The upper surface of the isolation unit 2216 in the height direction is higher than the position of the light conversion unit 2215, and is used to block at least part of the light beam emitted by the green light chip 2213 and the second blue light chip 2214 from reaching the light conversion unit 2215.

[0073] See Figure 5 Since the typical wavelength range of green light is 500nm-570nm, light within this wavelength range is... Figure 5 Compared to the excitation spectrum peaks of the KSF phosphor shown, the green light has a greater distance, resulting in lower excitation efficiency for the KSF phosphor compared to blue light in the 465nm-475nm band, thus reducing the amount of red light converted. However, if the isolation unit 2216 is placed between the green light chip 2213 and the second blue light chip 2214, when green light is emitted, the green light scattered to the light conversion unit 2215 will still be converted into a small portion of red light, causing the green light to be warmer and its color purity to decrease, thus affecting the display effect.

[0074] By placing the isolation unit 2216 between the first blue light chip 2212 and the green light chip 2213, the green light chip 2213 is prevented from scattering green light to the light conversion unit 2215, further reducing the possibility of generating red light when the green light chip 2213 emits light, thus ensuring the purity of the green light.

[0075] See Figure 6 , Figure 6 and Figure 4 The view is the same, with Figure 6 The direction in the middle is the reference direction, and the height direction of the isolation unit 2216 is parallel to the direction in the middle. Figure 6 The normal direction of the surface of the isolation unit 2216 is shown. The function of the isolation unit 2216 is physical isolation. By limiting the height of the isolation unit 2216 to be higher than the position of the light conversion unit 2215, the light beam emitted by the green light chip 2213 is blocked from reaching the light conversion unit 2215. This further reduces the excitation of the light conversion unit 2215 by the light beam emitted by the green light chip 2213 or the second blue light chip 2214, thereby reducing the possibility that the light conversion unit 2215 will convert and mix the light beam emitted by the green light chip 2213 or the second blue light chip 2214 into the light beam. This further reduces the crosstalk of the light beam converted by the light conversion unit 2215 to the light beam emitted by the green light chip 2213 or the second blue light chip 2214.

[0076] In some of these embodiments, see Figure 6The packaging bracket 2211, the first blue light chip 2212, the green light chip 2213, and the second blue light chip 2214 are all rectangular.

[0077] The long side extension direction of the first blue light chip 2212, the green light chip 2213, and the second blue light chip 2214 is parallel to the short side extension direction of the packaging bracket 2211, and the first blue light chip 2212, the green light chip 2213, and the second blue light chip 2214 are arranged in the long side direction of the packaging bracket 2211.

[0078] If the light-emitting chips are arranged sequentially along the short side of the packaging bracket 2211, it is impossible to arrange three light-emitting chips side by side along the short side. By arranging the light-emitting chips along the long side of the packaging bracket 2211, it is possible to ensure that the light-emitting chips are arranged side by side, and space can also be reserved for the placement of the isolation unit. Furthermore, the above arrangement method ensures that the color observed by the human eye is consistent from multiple angles, thereby reducing color separation.

[0079] In some of these embodiments, see Figure 7 The isolation unit 2216 is connected to the inner wall of the packaging bracket 2211, and the material of the light conversion unit 2215 fills the space formed by the isolation unit 2216 and the packaging bracket 2211.

[0080] Without the isolation unit 2216, the powdered light conversion unit 2215 material might freely diffuse within the packaging bracket 2211, increasing the coverage area of ​​the light conversion unit 2215 at the green light chip 2213 or the second blue light chip 2214. This would lead to absorption and consumption of the light beam emitted by the green light chip 2213, converting it into a red light beam and causing color shift. By setting the isolation unit 2216 and filling the space formed by the isolation unit 2216 and the packaging bracket 2211, not only can the diffusion of the light conversion unit 2215 material be limited, but it can also ensure that light emitted from all directions by the first blue light chip 2212 can be converted into a second light beam by the light conversion unit 2215.

[0081] In some embodiments, the isolation unit 2216 is opaque and reflects light onto the surface of the first blue light chip 2212.

[0082] The isolation unit 2216 is opaque, ensuring that the light beams emitted by the green light chip 2213 and the second blue light chip 2214 cannot pass through the isolation unit 2216 to reach the light conversion unit 2215. The isolation unit 2216 reflects light towards the first blue light chip 2212, reflecting the light scattered by the first blue light chip 2212 towards the isolation unit 2216 back to the first blue light chip 2212, improving the recovery of scattered light, and emitting the recovered scattered light along the target direction, thereby improving the light output efficiency.

[0083] In some of these embodiments, see Figure 8 The lamp bead 2210 also includes at least two light cups 2217, with the first blue light chip 2212 and the second blue light chip 2214 respectively disposed in different light cups 2217.

[0084] The light reflector 2217 is a device that controls the propagation path of a light beam, guiding and redistributing the light emitted by the light-emitting chip to the desired direction and area. The light reflector 2217 recovers and reflects side and backlight rays that would otherwise be lost, concentrating more light energy on the area requiring illumination and significantly improving light energy utilization. The light reflector 2217 also helps to make the light emitted by point LEDs more uniform, thereby ensuring that the light conversion material is more fully excited and reducing ineffective reflection and absorption of light within the system.

[0085] In some embodiments, the display device 200 further includes a plurality of driving circuits.

[0086] The first blue light chip 2212, the green light chip 2213, and the second blue light chip 2214 in the same LED bead 2210 are electrically connected to different driving circuits. Any light-emitting chip can be controlled to emit light by the driving circuit. Existing driving circuits are used, and their structures will not be described in detail here.

[0087] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display device, characterized by comprising: include: Display panel; A backlight module, disposed on the light-incident side of the display panel, is used to provide backlight for the display panel. The backlight module includes a plurality of LEDs, the LEDs including: Packaging bracket; A first blue light chip, a green light chip, and a second blue light chip are disposed within the packaging bracket; A light conversion unit is disposed on the light-emitting side of the first blue light chip. The light conversion unit is used to convert the first light beam emitted by the first blue light chip into a second light beam; the second light beam has a different wavelength from the first light beam. The first blue light chip has a shorter emission wavelength than the second blue light chip.

2. The display device of claim 1, wherein, The green light chip is disposed between the second blue light chip and the first blue light chip.

3. The display device of claim 2, wherein, The light conversion unit is used to convert blue light into red light, and the light conversion unit is not located on the light-emitting side of the second blue light chip and the green light chip.

4. The display device of claim 3, wherein, The light conversion unit includes KSF phosphor; The wavelength range of the first blue light chip includes 445nm-455nm; And / or, the wavelength range of the second blue light chip includes 465nm-475nm.

5. The display device according to any one of claims 1 to 4, characterized in that, The lamp beads also include: An isolation unit is disposed within the packaging bracket and between the first blue light chip and the green light chip, with the upper surface of the isolation unit in the height direction being higher than the position of the light conversion unit, for blocking at least a portion of the light beams emitted by the green light chip and the second blue light chip from reaching the light conversion unit.

6. The display device according to claim 5, characterized in that, The packaging bracket, the first blue light chip, the green light chip, and the second blue light chip are all rectangular; The long side of the first blue light chip, the green light chip, and the second blue light chip extends parallel to the short side of the packaging bracket, and the first blue light chip, the green light chip, and the second blue light chip are arranged along the long side of the packaging bracket.

7. The display device according to claim 5, characterized in that, The isolation unit is connected to the inner wall of the packaging bracket, and the material of the light conversion unit fills the space formed by the isolation unit and the packaging bracket.

8. The display device according to claim 5, characterized in that, The isolation unit is opaque and reflects light onto the surface of the first blue light chip.

9. The display device according to any one of claims 1 to 4, characterized in that, The lamp beads also include: At least two light cups, with the first blue light chip and the second blue light chip respectively disposed in different light cups.

10. The display device according to any one of claims 1 to 4, characterized in that, Also includes: Multiple driving circuits are provided, and the first blue light chip, the green light chip, and the second blue light chip in the same LED are electrically connected to different driving circuits.

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