Display device
Patent Information
- Application Number
- CN202521867939.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-08-29
AI Technical Summary
[0004]本申请提供一种显示设备，以解决现有封装支架尺寸难以解决光束串扰的问题
Smart Images
Figure CN224745246U_ABST
Abstract
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 is becoming increasingly smaller, and the mixing distance between chips is correspondingly shortened. This causes a large amount of strong light emitted from the bright field chips to intrude into the adjacent dark field areas. After being scattered by the optical film, this intruding light illuminates the dark field areas that should display pure black. Increasing the spacing between chips in the backlight module requires a corresponding increase in the size of the packaging bracket, which in turn makes it difficult for the packaging bracket to fit existing lenses due to its excessive size. Utility Model Content
[0004] This application provides a display device to solve the problem of beam crosstalk that is difficult to address with existing packaging bracket sizes.
[0005] In a first aspect, this application provides a display device, comprising:
[0006] LCD display panel;
[0007] A backlight module, disposed on the light-incident side of the liquid crystal display panel, is used to provide backlight for the liquid crystal 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, and the light conversion unit is used to convert the first light beam emitted by the first blue light chip into a second light beam;
[0011] An isolation unit is disposed within the packaging bracket, with the first blue light chip located on one side of the isolation unit, and the green light chip and the second blue light chip located on the other side of the isolation unit;
[0012] The size of the second blue light chip is smaller than that of the first blue light chip or the green light chip.
[0013] In some embodiments, the light conversion unit is used to convert the blue light emitted by the first blue light chip into red light, and the light conversion unit is not located on the light-emitting side of the green light chip and the second blue light chip.
[0014] In some embodiments, the isolation unit is connected to the inner wall of the packaging bracket and disposed between the first blue light chip and the green light chip, and the material of the light conversion unit fills the space formed by the isolation unit and the packaging bracket;
[0015] The isolation unit is opaque and reflects light onto the surface of the first blue light chip.
[0016] In some embodiments, the upper surface of the isolation unit in the height direction is higher than the position of the light conversion unit, for blocking at least part of the light beams emitted by the green light chip and the second blue light chip from directly reaching the light conversion unit.
[0017] In some embodiments, the area ratio of the emitting surfaces of the first blue light chip, the green light chip, and the second blue light chip is determined based on the correlation between the target color coordinates of white light and the conversion efficiency of the light conversion unit.
[0018] In some embodiments, the ratio of the area of the emitting surface of the second blue light chip to the area of the emitting surface of the green light chip is in the range of 1 / 13 to 1 / 6.
[0019] And / or, the ratio of the area of the emitting surface of the first blue light chip to the area of the emitting surface of the green light chip is in the range of 1 to 1.5.
[0020] In some embodiments, the width of the isolation unit is in the range of 20μm-50μm in the arrangement direction of the first blue light chip, the green light chip and the second blue light chip;
[0021] And / or, in the length direction of the packaging bracket, the distance between the second blue light chip and the green light chip is equal to the distance between the second blue light chip and the edge of the packaging bracket;
[0022] And / or, the distance between the second blue light chip and the green light chip is less than the distance between the first blue light chip and the green light chip.
[0023] In some embodiments, the packaging bracket, the first blue light chip, the green light chip, and the second blue light chip are all rectangular;
[0024] 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 sequentially along the long side of the packaging bracket.
[0025] In some embodiments, the liquid crystal display panel further includes:
[0026] A filter unit is positioned along the direction of the light output from the backlight module to allow light beams of the target wavelength to pass through.
[0027] In some embodiments, it also includes:
[0028] 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 so that they can be driven in a time-division manner.
[0029] The aforementioned display device converts a first light beam into a second light beam via a light conversion unit. By setting an isolation unit to separate the first blue light chip from the green and second blue light chips, when light leakage occurs in the light beams emitted by the green and second blue light chips, the amount of light beam reaching the light conversion unit can be reduced. This reduces the excitation of the light conversion unit by the light beams emitted by the green and second blue light chips, thereby reducing beam crosstalk during light emission and minimizing the possibility of color shift. By limiting the size of the second blue light chip to be smaller than that of the green or second blue light chip, space can be provided for setting the isolation unit within the packaging bracket. Attached Figure Description
[0030] 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.
[0031] 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;
[0032] Figure 2 Schematic diagrams of display devices provided in some embodiments of this application;
[0033] Figure 3 This is a schematic diagram of a backlight module provided in some embodiments of this application;
[0034] Figure 4 A schematic diagram of the LED beads provided in some embodiments of this application;
[0035] Figure 5 Schematic diagram of LED beads provided for other embodiments of this application;
[0036] Figure 6 Schematic diagram of LED beads provided for other embodiments of this application;
[0037] Figure 7 This is a schematic diagram of a display device provided for other embodiments of this application.
[0038] Explanation of reference numerals in the attached figures:
[0039] 100: Control device; 200: Display device; 210: Liquid crystal 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; 230: Driving circuit; 300: Mobile terminal; 400: Server. Detailed Implementation
[0040] 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.
[0041] 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.
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] 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.
[0047] 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.
[0048] 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.
[0049] 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.
[0050] 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.
[0051] 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.
[0052] This application provides a display device 200, see reference. Figure 2 The display device 200 includes: a liquid crystal display panel 210 and a backlight module 220.
[0053] Understandably, the liquid crystal display panel 210 itself does not have the ability to emit light; it 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 inside the liquid crystal display panel 210 to achieve the presentation of a color image. More specifically, the liquid crystal 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.
[0054] The liquid crystal display panel 210 can be a liquid crystal display screen, liquid crystal monitor, instrument panel, or other display products. The liquid crystal display panel 210 is configured to display images.
[0055] A backlight module 220 is disposed on the light-incident side of the liquid crystal display panel 210 and is used to provide backlight for the liquid crystal display panel 210. The backlight module 220 can emit light uniformly throughout the entire light-emitting surface, providing uniform light to the light-incident side of the liquid crystal display panel 210, so that the light transmitted by each liquid crystal cell forms a uniform display image.
[0056] 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, a second blue LED chip 2214, a light conversion unit 2215, and an isolation unit 2216 disposed within the packaging bracket 2211, 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.
[0057] The light conversion unit 2215 is disposed on the light-emitting side of the first blue light chip 2212, and 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.
[0058] The light conversion unit 2215 can be at least one of phosphors and quantum dots. The core principle of light beam conversion using 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, and the color is 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.
[0059] It is understandable that both phosphors and quantum dots absorb light beam energy. Therefore, the energy of the first light beam converted by phosphors or quantum dots is higher than that of the second light beam, which allows us to determine that the wavelength of the second light beam is longer than that of the first light beam.
[0060] 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 reversed within the packaging bracket 2211, as long as their emitting sides are consistent; no restrictions are imposed here.
[0061] The isolation unit 2216 is disposed within the packaging bracket 2211, the first blue light chip 2212 is located on one side of the isolation unit 2216, and the green light chip 2213 and the second blue light chip 2214 are located on the other side of the isolation unit 2216.
[0062] Specifically, the first blue light chip 2212 is isolated from the green light chip 2213 and the second blue light chip 2214 by an isolation unit. Furthermore, the light conversion unit 2215 is isolated from the green light chip 2213 and the second blue light chip 2214. This reduces the likelihood of the light beams emitted by the green light chip 2213 and the second blue light chip 2214 reaching the light conversion unit 2215, thereby reducing the conversion of the light beams emitted by the green light chip 2213 and the second blue light chip 2214 when they emit light, and thus reducing crosstalk.
[0063] The size of the second blue light chip 2214 is smaller than the size of the first blue light chip 2212 or the green light chip 2213.
[0064] Because the spacing between the light-emitting chips is small, if the size of the second blue light chip 2214 is not reduced, but is greater than or equal to the size of the first blue light chip 2212 or the green light chip 2213, it cannot be guaranteed that the existing packaging bracket 2211 has enough space to accommodate the isolation unit 2216. If the isolation unit 2216 is not set, it will increase the crosstalk of the light conversion unit 2215 to the light beam emitted by the green light chip 2213 or the second blue light chip 2214.
[0065] The aforementioned display device converts a first light beam into a second light beam via a light conversion unit 2215. By providing an isolation unit 2216 to separate the first blue light chip 2212 from the green light chip 2213 and the second blue light chip 2214, light leakage from the light beams emitted by the green light chip 2213 and the second blue light chip 2214 can be reduced, thereby reducing the excitation of the light conversion unit 2215 by the light beams emitted by the green light chip 2213 and the second blue light chip 2214. This further reduces beam crosstalk when the green light chip 2213 and the second blue light chip 2214 emit light, and reduces the possibility of color shift. By limiting the size of the second blue light chip 2214 to be smaller than the size of the green light chip 2213 or the second blue light chip 2214, space can be provided for the isolation unit 2216 within the packaging bracket 2211.
[0066] In some embodiments, the light conversion unit 2215 is used to convert blue light into red light. 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. Mixing red, green, and blue light can produce white light.
[0067] 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.
[0068] To address the issue of high temperature in the aforementioned red light chip, this application employs a first blue light chip 2212 and a light conversion unit 2215 working together to achieve red light output. The light conversion unit 2215 can be either red phosphor or red quantum dot.
[0069] It is understandable that light excitation is an energy transfer process. Compared to green light, blue light has higher photon 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.
[0070] 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.
[0071] In some embodiments, the isolation unit 2216 is connected to the inner wall of the packaging bracket 2211 and disposed between the first blue light chip 2212 and the green light chip 2213. The material of the light conversion unit 2215 fills the space formed by the isolation unit 2216 and the packaging bracket 2211. The isolation unit 2216 is opaque and reflects light onto the surface of the first blue light chip 2212. A schematic diagram of the material filling of the light conversion unit 2215 is shown below. Figure 5 , Figure 5 View direction and Figure 4 The view orientation is consistent.
[0072] The wavelength range of green light is 500nm-570nm. Light in this wavelength range has low excitation efficiency for the light conversion unit 2215, which can reduce 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, resulting in a warmer green color and reduced color purity, thus affecting the display effect.
[0073] 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.
[0074] Without the isolation unit 2216, the material of the light conversion unit 2215 might diffuse freely 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 or the second blue light chip 2214, 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 material of the light conversion unit 2215 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.
[0075] Furthermore, the opaque nature of the isolation unit 2216 ensures 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.
[0076] In some embodiments, the upper surface of the isolation unit 2216 in the height direction is higher than the position of the light conversion unit 2215, for blocking 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.
[0077] See Figure 5 , Figure 5 and Figure 4 The view is the same, with Figure 5 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 5 The normal direction of the surface of the isolation unit 2216 is shown. The function of the isolation unit 2216 is physical isolation, which blocks the light beams emitted by the green light chip 2213 and the second blue light chip 2214 from reaching the light conversion unit 2215. This further reduces the excitation of the light conversion unit 2215 by the light beams emitted by the green light chip 2213 and the second blue light chip 2214, thereby reducing the possibility that the light conversion unit 2215 will convert the light beams emitted by the green light chip 2213 and the second blue light chip 2214 and mix them into the light beams emitted by the green light chip 2213 or the second blue light chip 2214. This reduces the crosstalk of the light beam converted by the light conversion unit 2215 to the light beams emitted by the green light chip 2213 or the second blue light chip 2214.
[0078] In some embodiments, the ratio of the area of the light-emitting surface of the first blue light chip 2212, the green light chip 2213 and the second blue light chip 2214 is determined based on the correlation between the target color coordinates of white light and the conversion efficiency of the light conversion unit 2215.
[0079] Typically, the basic RGB brightness ratio in white light is 3:6:1, with a relatively low demand for blue light. Therefore, reducing the size of the second blue light chip 2214 can meet the white light requirements. However, the demand for red light is relatively high. In this embodiment, the red light is obtained by converting blue light using the light conversion unit 2215. During the conversion process, the light conversion unit 2215 absorbs some blue light. Therefore, the size of the second blue light chip 2214 needs to be adaptively increased according to the conversion efficiency to compensate for the blue light loss of the light conversion unit 2215.
[0080] For example, the light conversion unit 2215 is a potassium manganese fluorosilicate phosphor (K2SiF6:Mn). 4+ In the case of KSF phosphor, the conversion efficiency of the light conversion unit 2215 is 70%-80%. The specific conversion efficiency is also related to the wavelength of the second blue light chip. If the wavelength of the second blue light chip is closer to the peak of the excitation spectrum of the KSF phosphor, the corresponding conversion efficiency is higher. The higher the conversion efficiency, the smaller the area that the second blue light chip 2214 needs to increase.
[0081] By correlating the luminescent surface area of the light-emitting chip with the color coordinates and the conversion efficiency of the light conversion unit 2215, it can be ensured that the light-emitting chip can provide sufficient brightness to match the target white light.
[0082] In some embodiments, the ratio of the area of the light-emitting surface of the second blue light chip 2214 to the area of the light-emitting surface of the green light chip 2213 is in the range of 1 / 13 to 1 / 6.
[0083] The ratio of the area of the emitting surface of the second blue light chip 2214 to the area of the emitting surface of the green light chip 2213 can be 1 / 13, 1 / 10, 1 / 8, or 1 / 6, etc., and is not limited here. As long as the light beam emitted by the second blue light chip 2214 meets the requirements, the size of the second blue light chip 2214 should be minimized as much as possible while meeting the requirements.
[0084] In some embodiments, the ratio of the area of the emitting surface of the first blue light chip 2212 to the area of the emitting surface of the green light chip 2213 is in the range of 1 to 1.5.
[0085] The ratio of the area of the light-emitting surface of the first blue light chip 2212 to the area of the light-emitting surface of the green light chip 2213 can be 1, 1.1, 1.2, 1.3, 1.4, 1.5, etc., and is not limited here. It can be set according to the light emission requirements and the conversion efficiency of the light conversion unit 2215.
[0086] In some embodiments, the ratio of the area of the emitting surface of the second blue light chip 2214 to the area of the emitting surface of the green light chip 2213 is in the range of 1 / 13 to 1 / 6, while the ratio of the area of the emitting surface of the first blue light chip 2212 to the area of the emitting surface of the green light chip 2213 is in the range of 1 to 1.5.
[0087] The area of the first blue light chip 2212 and the second blue light chip 2214 must take into account not only the space for the isolation unit 2216, but also whether the emitted light beam meets the light emission requirements. No specific area ratio is restricted here, as long as the light emission requirements are met.
[0088] By limiting the ratio of the area of the emitting surface of the second blue light chip 2214 to the area of the emitting surface of the green light chip 2213, and the ratio of the area of the emitting surface of the first blue light chip 2212 to the area of the emitting surface of the green light chip 2213, the emitting size range of the other two light-emitting chips can be quickly determined when the size of one light-emitting chip is determined, and the chip with the smallest size that meets the emitting requirements can be further screened out, providing space for setting up isolation units or other structures to adapt to existing packaging brackets.
[0089] In some embodiments, in the arrangement direction of the first blue light chip 2212, the green light chip 2213, and the second blue light chip 2214, the width of the isolation unit 2216 is in the range of 20μm-50μm, and the width direction is as follows: Figure 4 As shown.
[0090] The width of the isolation unit 2216 can be 20μm, 30μm, 40μm, 50μm, etc., and is not limited here. It can be selected according to the size of the light-emitting chip. If the size of the light-emitting chip is large and the remaining space within the packaging bracket 2211 is small, then the width of the isolation unit 2216 should be smaller; if the size of the light-emitting chip is small, then the width of the isolation unit 2216 can be larger. The specific selection should be adapted according to the requirements and available space. By limiting the width of the isolation unit 2216 to the range of 20μm-50μm, it is possible to ensure that it adapts to the size of the packaging bracket 2211 while ensuring that the light beam does not pass through and reach the light conversion unit 2215.
[0091] In some embodiments, the distance between the second blue light chip 2214 and the green light chip 2213 along the length of the packaging bracket 2211 is equal to the distance between the second blue light chip 2214 and the edge of the packaging bracket 2211.
[0092] With the above limitations, the position of the green light chip 2213 can be quickly determined based on the position of the second blue light chip 2214 inside the packaging bracket 2211, which facilitates the internal structural design of the lamp bead 2210.
[0093] In some embodiments, the distance between the second blue light chip 2214 and the green light chip 2213 is smaller than the distance between the first blue light chip 2212 and the green light chip 2213.
[0094] Understandably, the isolation unit 2216 is positioned between the first blue light chip 2212 and the green light chip 2213, limiting the distance between them to be greater than the distance between the second blue light chip 2214 and the green light chip 2213, which facilitates the placement of the isolation unit 2216. Furthermore, since the second blue light chip 2214 is smaller than the green light chip 2213, reducing the distance between them allows the green light chip 2213 to block the light beam emitted by the second blue light chip 2214 from reaching the light conversion unit 2215, further reducing crosstalk.
[0095] In some embodiments, the packaging bracket 2211, the first blue light chip 2212, the green light chip 2213, and the second blue light chip 2214 are all rectangular.
[0096] 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 sequentially along the long side direction of the packaging bracket 2211.
[0097] 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 remains consistent from multiple angles, thereby reducing color separation.
[0098] In some embodiments, the liquid crystal display panel 210 further includes a light filter unit (not shown).
[0099] The filter unit is positioned along the direction of the light output from the backlight module 220 to allow light beams of the target wavelength to pass through.
[0100] The position of the filter unit within the liquid crystal display panel 210 can be on the side of the liquid crystal layer of the liquid crystal display panel 210 away from the backlight module 220. The specific position varies depending on the internal structure of the liquid crystal display panel 210, and is not limited here. Existing filters can be used for filtering, enabling the filtering of beams of a specific wavelength to pass through another specific wavelength.
[0101] In some embodiments, the display device 200 further includes a plurality of driving circuits 230, such as Figure 6 As shown.
[0102] The first blue light chip 2212, the green light chip 2213, and the second blue light chip 2214 in the same LED 2210 are electrically connected to different driving circuits 230 so that they can be driven in a time-division manner.
[0103] The driving circuit 230 can control any light-emitting chip to emit light. The driving circuit 230 adopts the existing driving circuit 230, and the circuit structure will not be described in detail here.
[0104] By using the driving circuit 230 to drive the light-emitting chips in a time-division manner, it is possible to avoid all light-emitting chips emitting light at the same time, thereby reducing crosstalk.
[0105] In some embodiments, the lamp bead 2210 further includes at least two reflectors 2217, such as... Figure 7As shown, the first blue light chip 2212 and the second blue light chip 2214 are respectively disposed in different light cups 2217.
[0106] The light reflector 2217 controls the beam propagation path. It guides and redistributes the beams emitted by the first blue LED chip 2212 and the second blue LED chip 2214 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 the dot LEDs more uniform, ensuring that the light conversion material is more fully excited and reducing ineffective reflection and absorption of light within the system.
[0107] 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.
[0108] 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.
[0109] 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: LCD display panel; A backlight module, disposed on the light-incident side of the liquid crystal display panel, is used to provide backlight for the liquid crystal 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, and the light conversion unit is used to convert the first light beam emitted by the first blue light chip into a second light beam; An isolation unit is disposed within the packaging bracket, with the first blue light chip located on one side of the isolation unit and the green light chip and the second blue light chip located on the other side of the isolation unit; The size of the second blue light chip is smaller than that of the first blue light chip or the green light chip.
2. The display device of claim 1, 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 green light chip and the second blue light chip.
3. The display device of claim 2, wherein, The isolation unit is connected to the inner wall of the packaging bracket and is disposed between the first blue light chip and the green light chip. The material of the light conversion unit fills the space formed by the isolation unit and the packaging bracket. The isolation unit is opaque and reflects light onto the surface of the first blue light chip.
4. The display device of claim 2, wherein, The upper surface of the isolation unit in the height direction is higher than the position of the light conversion unit, which is used to block at least part of the light beam emitted by the green light chip and the second blue light chip from directly reaching the light conversion unit.
5. The display device of claim 2, wherein, The ratio of the area of the light-emitting surface of the first blue light chip, the green light chip, and the second blue light chip is determined based on the correlation between the target color coordinates of white light and the conversion efficiency of the light conversion unit.
6. The display device of claim 2, wherein, The ratio of the area of the light-emitting surface of the second blue light chip to the area of the light-emitting surface of the green light chip is in the range of 1 / 13 to 1 / 6. And / or, the ratio of the area of the emitting surface of the first blue light chip to the area of the emitting surface of the green light chip is in the range of 1 to 1.
5.
7. The display device according to any one of claims 1 to 6, characterized in that, In the arrangement direction of the first blue light chip, the green light chip, and the second blue light chip, the width of the isolation unit is in the range of 20μm-50μm; And / or, in the length direction of the packaging bracket, the distance between the second blue light chip and the green light chip is equal to the distance between the second blue light chip and the edge of the packaging bracket; And / or, the distance between the second blue light chip and the green light chip is less than the distance between the first blue light chip and the green light chip.
8. The display device of claim 7, wherein, 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 sequentially along the long side of the packaging bracket.
9. The display device according to any one of claims 1 to 6, characterized in that, The liquid crystal display panel further includes: A filter unit is positioned along the direction of the light output from the backlight module to allow light beams of the target wavelength to pass through.
10. The display device according to any one of claims 1 to 6, characterized in that, Also includes: A plurality of driving circuits, the first blue light chip, the green light chip and the second blue light chip in the same lamp bead are respectively electrically connected with different driving circuits to be driven by time division.