Optical module capable of realizing one-area two-control

Abstract

The utility model provides an optical module capable of realizing one-area two-control, which comprises a light-emitting LED lamp bead unit, a reflecting wall structure is arranged in the light-emitting LED lamp bead unit to form a left independent lamp groove and a right independent lamp groove, and at least one LED chip is packaged in each independent lamp groove; each independent lamp groove is connected to a zone control chip through an independent driving circuit so as to realize independent control of a left zone and a right zone in a single light-emitting LED lamp bead unit; the grating groove is formed in the light emitting direction of the LED lamp bead unit; and the optical distribution plate is positioned on the light emitting side of the grating groove and is used for uniformly distributing light energy and reducing brightness attenuation. According to the Mini LED display, on the premise that the existing mature POB lamp bead manufacturing process is not changed and the number of backlight module LED lamp beads and area control ICs is not greatly increased, the picture can be optimized and improved, the cost is effectively controlled, and energy is saved.

Description

Technical Field

[0001] This utility model relates to the field of optical module technology, and in particular to an optical module module that realizes one-zone two-control. Background Technology

[0002] Current zone control display technology mainly improves its effectiveness through the following methods:

[0003] (1) Increasing the number of LED beads to refine the zoning, but this leads to a significant increase in cost;

[0004] (2) The POB process is replaced with the COB flip chip process, but the process complexity and defect rate increase.

[0005] (3) Adding a grating groove to suppress halo interference, but it is easy to cause the contrast between bright and dark areas to be too strong, causing the "mosaic" phenomenon;

[0006] (4) The “one lamp, one control” design requires a significant increase in the number of zone control ICs, which further increases costs.

[0007] The market demand for high-contrast, low-power, and low-cost zone control displays is increasingly urgent, especially for Mini LED backlight technology, which urgently needs to achieve performance breakthroughs based on mature processes. Technological directions focus on optimizing light source design, improving optical structures, and balancing cost and performance. However, traditional grating groove designs result in abrupt drops in light intensity, affecting image uniformity; increasing the number of LEDs or zone control ICs can improve zone accuracy, but significantly increases manufacturing costs; COB processes and new equipment investment further exacerbate production difficulties and yield issues. Utility Model Content

[0008] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an optical module module that realizes one-zone two-control, which can optimize and improve the picture, and effectively control costs and save energy.

[0009] To achieve the above objectives, this utility model provides the following solution:

[0010] An optical module module for implementing dual control in one area, comprising:

[0011] The LED light-emitting unit has a reflective wall structure inside to form two independent light slots, each of which encapsulates at least one LED chip. The reflective wall structure is used to reflect the light emitted by the LED chip to form a large-angle light emission and to isolate the light path of the left and right light slots to achieve independent control. Each independent light slot is connected to a zone control chip through an independent driving circuit to achieve independent control of the left and right zones within a single LED light-emitting unit.

[0012] A grating groove is disposed in the light emission direction of the light-emitting LED lamp bead unit;

[0013] An optical distribution plate, located on the light-emitting side of the grating groove, is used to uniformly distribute light energy and reduce brightness attenuation.

[0014] Preferably, the optical distribution plate includes at least one of a beam splitter, a diffuser, or a light homogenizer.

[0015] Preferably, the reflective wall has a V-shaped or U-shaped structure, the surface of the reflective wall is covered with a high reflectivity material, and the mounting position of the LED chip is aligned with the geometric center of the reflective wall structure to maximize light energy utilization.

[0016] Preferably, the groove depth of the grating groove is 1.0mm-10.0mm, the tilt angle is 30°-60°, and the center distance between adjacent grating grooves is 10.0mm-30.0mm.

[0017] Preferably, the optical distribution plate is a beam splitter, and the surface of the beam splitter is provided with a microprism array for distributing the incident light to different areas according to a preset ratio.

[0018] Preferably, the light-emitting LED lamp bead unit adopts POB packaging technology.

[0019] Preferably, the high reflectivity material is a metal coating or a dielectric reflective film.

[0020] Preferably, the reflectivity of the high-reflectivity material is not less than 90%.

[0021] According to the specific embodiments provided by this utility model, the following technical effects are disclosed:

[0022] This invention provides a light module module for achieving one-zone two-control, comprising: an LED bead unit, wherein the LED bead unit has a reflective wall structure to form two independent light slots, each of which encapsulates at least one LED chip; the reflective wall structure is used to reflect the light emitted by the LED chip to form large-angle light emission and to isolate the light paths of the left and right light slots for independent control; each independent light slot is connected to a zone control chip through an independent driving circuit to achieve independent control of the left and right zones within a single LED bead unit; a grating slot is disposed in the light emission direction of the LED bead unit; and an optical distribution plate is located on the light emission side of the grating slot to uniformly distribute light energy and reduce brightness attenuation. This invention effectively optimizes and enhances the image quality of Mini LED (Local Dimming) displays without changing the existing mature POB bead manufacturing process or significantly increasing the number of LED beads and zone control ICs in the backlight module, while effectively controlling costs and saving energy. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the optical module structure when the right zone is lit, provided for an embodiment of this utility model;

[0025] Figure 2 A schematic diagram of the optical module structure when the left zone is lit, provided for an embodiment of this utility model;

[0026] Figure 3 A schematic diagram of the overall light-emitting LED lamp bead unit provided in this embodiment of the utility model;

[0027] Figure 4 A schematic diagram of the structure of the LED lamp bead unit provided in the embodiment of this utility model;

[0028] Figure 5 A schematic diagram illustrating the adjustment of the groove depth and angle of the grid groove provided in this embodiment of the utility model;

[0029] Figure 6 A schematic diagram of a beam splitter provided in an embodiment of this utility model;

[0030] Figure 7 A schematic diagram of the effective light area provided for an embodiment of this utility model;

[0031] Figure 8 This is a comparative schematic diagram of a slow-descent method provided for an embodiment of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Optical distribution plate; 2. Grating groove; 3. Light-emitting LED lamp bead unit; 31. Reflector wall structure; 32. LED chip; 33. Independent lamp groove; 34. Positive electrode; 35. Negative electrode. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] The purpose of this invention is to provide an optical module that enables dual control in one zone, thereby optimizing and improving the picture quality while effectively controlling costs and saving energy.

[0036] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figure 1 and Figure 2 As shown, this utility model provides an optical module module for realizing one-zone two-control, including:

[0038] LED light bead unit 3, such as Figure 3 and Figure 4 As shown, using POB (Package on Board) packaging technology, each LED unit incorporates a V-shaped reflector wall structure 31, dividing the interior of the LED into two independent light slots 33. Each independent light slot 33 encapsulates an LED chip 32, whose mounting position is aligned with the geometric center of the V-shaped reflector wall to ensure maximum light energy utilization. The reflector wall surface is coated with an aluminum layer with a reflectivity ≥92%, which diffuses the light emitted by the LED chip 32 to a large angle (emission angle ≥180°) through refraction and reflection, while simultaneously isolating the light paths of the left and right light slots to avoid halo interference. The left and right light slots are connected to the same zone control chip via independent drive circuits, enabling independent control of the left and right zones within a single LED unit.

[0039] The grating slot 2 is located in the light-emitting direction of the LED lamp bead unit. Its slot depth is 1.0mm-10.0mm, its tilt angle is 30°-60°, and the center-to-center distance between adjacent grating slots 2 is 10.0mm-30.0mm. By optimizing the slot depth and angle, the light-blocking and light-receiving functions of the grating slot 2 are balanced, reducing the "cliff-like" contrast between bright and dark areas, while suppressing halo phenomena.

[0040] Optical distribution plate 1, located on the light-emitting side of grating slot 2, is a beam splitter with a periodic array of microprisms on its surface. The prisms are 20 μm high and 50 μm apart. The microprism array distributes the incident light to different areas according to a preset ratio, avoiding brightness attenuation and improving light energy uniformity.

[0041] As an example, this embodiment utilizes the side-emitting characteristic of the LED bead, and to increase the side light intensity, the LED bead is designed with a "reflective wall" to form two independent light slots 33. This feature is then used to individually control the two LED chips 32 within the LED bead, achieving unidirectional light emission. The left and right light slots are connected to the same zone control chip through their respective positive terminals 34 and negative terminals 35.

[0042] Furthermore, the reflective wall structure 31 can also adopt a U-shaped structure, with its surface coated with a titanium dioxide / silicon dioxide multilayer dielectric reflective film (reflectivity ≥95%), and its geometric center coincides with the mounting position of the dual LED chips 32. Through the interference effect of the multilayer dielectric film, light absorption loss is further reduced, and the lateral light intensity is increased by more than 50%.

[0043] Optionally, such as Figure 5 As shown, the parameters of grating slot 2 are adjusted as follows for Mini LED backlight modules of different sizes:

[0044] (1) Groove depth: 1.0 mm to 10.0 mm;

[0045] (2) Inclination angle: 30° to 60°;

[0046] (3) Center spacing: 10.0mm (high-density zoning) to 30.0mm (low-cost solution).

[0047] By adjusting the parameter settings to suit different application scenarios, such as a groove depth of 1.5mm and an angle of 50°, the contrast ratio can be significantly improved by 10%.

[0048] Specifically, such as Figure 6 As shown, the optical distribution plate 1 can be replaced by a diffuser plate or a light homogenizer plate: the surface of the diffuser plate is coated with atomized particles with a particle size of 5-10μm, which achieves light homogenization through diffuse reflection and is suitable for low-cost display devices; the light homogenizer plate has a microlens array embedded inside with a diameter of 50μm, which equalizes the light intensity distribution through refraction and is suitable for high-brightness displays.

[0049] The working process of this utility model is as follows:

[0050] The zone control chip independently drives the LED chips 32 in the left and right light slots according to the display signal to achieve local dimming;

[0051] After being diffused by the reflective wall structure 31, the LED light passes through the grating groove 2 to suppress stray light, and is then evenly distributed to the screen by the beam splitter.

[0052] like Figure 7 and Figure 8 As shown, compared to traditional solutions, this module reduces the halo area and improves contrast while maintaining the same power consumption. This solution is compatible with existing POB packaging technology, requires no additional complex manufacturing equipment, and is suitable for Mini LED TVs, automotive displays, and high-end monitors, offering mass production feasibility and cost advantages.

[0053] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0054] This document uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. Furthermore, those skilled in the art will recognize that, based on the ideas of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An optical module module for realizing one-area two-control, characterized in that, include: The LED light-emitting unit has a reflective wall structure inside to form two independent light slots, each of which encapsulates at least one LED chip. The reflective wall structure is used to reflect the light emitted by the LED chip to form a large-angle light emission and to isolate the light path of the left and right light slots to achieve independent control. Each independent light slot is connected to a zone control chip through an independent driving circuit to achieve independent control of the left and right zones within a single LED light-emitting unit. A grating groove is disposed in the light emission direction of the light-emitting LED lamp bead unit; An optical distribution plate, located on the light-emitting side of the grating groove, is used to uniformly distribute light energy and reduce brightness attenuation; The optical distribution plate includes at least one of a beam splitter, a diffuser, or a light homogenizer. The optical distribution plate is a beam splitter, and the surface of the beam splitter is provided with a microprism array, which is used to distribute the incident light to different areas according to a preset ratio. Each of the independent light slots is connected to the same zone control chip through an independent driving circuit to achieve independent control of the left and right zones within a single light-emitting LED bead unit.

2. The optical module module for realizing one-zone two-control as described in claim 1, characterized in that, The reflective wall has a V-shaped or U-shaped structure, and its surface is covered with a high-reflectivity material. The LED chip is installed at a position aligned with the geometric center of the reflective wall structure to maximize light energy utilization.

3. The optical module module for realizing one-zone two-control as described in claim 1, characterized in that, The groove depth of the grating is 1.0mm-10.0mm, the tilt angle is 30°-60°, and the center-to-center distance between adjacent grating grooves is 10.0mm-30.0mm.

4. The optical module module for realizing one-zone two-control as described in claim 1, characterized in that, The LED light-emitting unit adopts POB packaging technology.

5. The optical module module for realizing one-zone two-control as described in claim 2, characterized in that, The high reflectivity material is a metal coating or a dielectric reflective film.

6. The optical module module for realizing one-zone two-control as described in claim 2, characterized in that, The reflectivity of the high-reflectivity material is not less than 90%.

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