Light bar and display device
By installing a dimming structure on the light strip substrate and using an encapsulation layer and a light guide plate to optimize light propagation, the problem of light dispersion in the light strip is solved, and the concentration and efficient utilization of light are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HKC CORP LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-10
AI Technical Summary
The light from traditional light strips is easily dispersed during propagation, leading to the risk of light leakage and low light utilization efficiency.
A dimming structure housing is installed on the substrate of the light strip. The housing is connected to the substrate, so that the light-emitting unit is confined in the cavity of the housing. The light propagation direction is optimized by the design of the dimming structure, and the concentration of light is improved by the encapsulation layer and the light guide plate.
It reduces the divergence angle of light, lowers the risk of light leakage, and improves the efficiency of light utilization and the light source quality of the display device.
Smart Images
Figure CN224480787U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of displays, and more particularly to a light strip and a display device. Background Technology
[0002] Traditional light strips, due to their bracket and light-emitting surface design, cause light to easily disperse in all directions during propagation, forming a large divergence angle, which in turn poses a risk of light leakage. In addition, the light emitted by the light-emitting units on the light strip is easily absorbed or reflected by the bracket material or other parts, causing light source dispersion. This further weakens the actual light-emitting effect of the light strip and reduces light utilization efficiency.
[0003] Therefore, how to improve the problem of large light divergence angle of light strips, reduce the risk of light leakage, and improve light utilization efficiency has become an urgent problem to be solved in this field. Utility Model Content
[0004] This application discloses a light strip and a display device, the purpose of which is to improve the problem of large light divergence angle of the light strip, reduce the risk of light leakage of the light strip, and improve light utilization efficiency.
[0005] This application discloses a light strip, including a substrate and a plurality of light-emitting units. The plurality of light-emitting units are arranged at intervals on the substrate. A dimming structure is provided on the substrate. The dimming structure includes a housing with a cavity inside. The housing is connected to the substrate. The housing has a first opening and a second opening, which are arranged opposite to each other. The second opening is located on the side of the housing closer to the substrate, and the plurality of light-emitting units are located in the second opening. The projected area of the first opening on the substrate is smaller than the projected area of the second opening on the substrate.
[0006] Optionally, the housing includes a first sidewall and a second sidewall, which are disposed opposite to each other. The first sidewall and the second sidewall are respectively inclined inward relative to the substrate, and the first sidewall and the second sidewall have a preset tilt angle with the substrate, wherein the preset tilt angle is an acute angle.
[0007] Optionally, both the first opening and the second opening are elongated, and the extension directions of the first opening and the second opening are the same as the extension direction of the substrate; the width of the second opening is greater than or equal to the total length of the plurality of light-emitting units, and the width of the first opening is less than the width of the second opening.
[0008] Optionally, the width of the housing gradually decreases from the second opening toward the first opening.
[0009] Optionally, the cavity of the housing is filled with an encapsulation layer, which covers a plurality of the light-emitting units, and the material used to make the encapsulation layer includes epoxy resin.
[0010] Optionally, the portion of the encapsulation layer located at the first opening does not protrude beyond the first opening.
[0011] Optionally, the light strip further includes a light guide plate connected to the side of the housing away from the substrate, and the light guide plate covers the first opening, wherein the refractive index of the light guide plate is the same as the refractive index of the encapsulation layer.
[0012] Optionally, the light-emitting unit includes a light-emitting chip, and the plurality of light-emitting chips include independently controlled red light chips, green light chips and blue light chips, which are arranged alternately on the substrate.
[0013] Optionally, a reflective layer is provided on the inner wall of the housing. The reflective layer is used to reflect the light emitted by the light-emitting chip from the inner wall of the housing to the first opening and then out through the first opening.
[0014] This application also discloses a display device, including a rear shell, and the display device further includes the aforementioned light strip, which is disposed on the rear shell.
[0015] This application improves upon traditional light strips by installing a dimming structure on the substrate of the light strip. The housing of the dimming structure is connected to the substrate, confining multiple light-emitting units on the substrate within the cavity of the housing. The housing effectively shields the light emitted by the light-emitting units, reducing light penetration into other light-absorbing structures or locations, thus effectively reducing light loss. Furthermore, multiple light-emitting units direct light from the housing through a second opening towards the first opening. This optimizes the direction and path of light propagation. Additionally, because the projected area of the first opening on the substrate is smaller than that of the second opening, the light emitted by the light-emitting units first enters the cavity inside the housing through the larger second opening and exits through the smaller first opening. This process concentrates the light, reducing the light divergence angle. This improves the problem of large light divergence angles in light strips, reduces the risk of light leakage, and improves the light utilization efficiency of the light source. Attached Figure Description
[0016] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They serve to demonstrate implementation methods of this application and, together with the textual description, explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort. In the drawings:
[0017] Figure 1 This is a schematic diagram of the first embodiment of the light strip of this application;
[0018] Figure 2 This is a schematic diagram showing the connection between the substrate and the light-emitting unit in the first embodiment of the light strip of this application;
[0019] Figure 3 This is a schematic diagram of a second embodiment of the light strip of this application;
[0020] Figure 4 This is a schematic diagram of the third embodiment of the light strip of this application;
[0021] Figure 5 This is a schematic diagram showing the connection between the substrate and the light-emitting chip in the fourth embodiment of the light strip of this application;
[0022] Figure 6 This is a schematic diagram of the fifth embodiment of the light strip of this application;
[0023] Figure 7 This is a schematic diagram of an embodiment of the display device of this application.
[0024] Among them, 10 is a display device; 100 is a light strip; 200 is a back cover; 300 is a dimming structure; 110 is a housing; 111 is a first opening; 112 is a second opening; 113 is a first sidewall; 114 is a second sidewall; 120 is a substrate; 130 is a light-emitting unit; 131 is a light-emitting chip; 132 is a red light chip; 133 is a green light chip; 134 is a blue light chip; 140 is an encapsulation layer; 150 is a light guide plate; 160 is a reflective layer; and 170 is a cavity. Detailed Implementation
[0025] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0026] Figure 1 This is a schematic diagram of the first embodiment of the light strip of this application. Figure 2 This is a schematic diagram of the connection between the substrate and the light-emitting unit in the first embodiment of the light strip of this application, as shown below. Figure 1 and Figure 2As shown in the figure, this application discloses a light strip 100, including a substrate 120 and a plurality of light-emitting units 130. The plurality of light-emitting units 130 are arranged at intervals on the substrate 120. A dimming structure 300 is provided on the substrate 120. The dimming structure 300 includes a housing 110. The housing 110 has a cavity 170 inside. The housing 110 is connected to the substrate 120. A first opening 111 and a second opening 112 are provided on the housing 110. The first opening 111 and the second opening 112 are arranged opposite to each other. The second opening 112 is located on the side of the housing 110 closer to the substrate 120, and the plurality of light-emitting units 130 are located in the second opening 112. The orthogonal projection area of the first opening 111 on the substrate 120 is smaller than the orthogonal projection area of the second opening 112 on the substrate 120.
[0027] This application improves upon the conventional light strip 100 by installing a dimming structure 300 on the substrate 120 of the light strip 100. The housing 110 of the dimming structure 300 is connected to the substrate 120, thus confining multiple light-emitting units 130 on the substrate 120 within the cavity 170 of the housing 110. The housing 110 effectively shields the light emitted by the light-emitting units 130, reducing light penetration into other light-absorbing structures or locations, thereby effectively reducing light loss. Furthermore, the multiple light-emitting units 130 emit light through a second opening 112 on the housing 110. The first opening 111 directs the light out, optimizing the direction and path of light propagation. Furthermore, since the projected area of the first opening 111 on the substrate 120 is smaller than that of the second opening 112, the light emitted by the light-emitting unit 130 first enters the internal cavity 170 of the housing 110 through the larger second opening 112 and then exits from the smaller first opening 111. This process concentrates the light, thereby reducing the divergence angle of the light. This improves the problem of the large divergence angle of the light strip 100, reduces the risk of light leakage, and improves the light utilization efficiency of the light source.
[0028] It should be noted that the light strip 100 in this application can be a side-lit light strip 100 or other types of light strip 100. This application only uses a side-lit light strip 100 as an example.
[0029] Specifically, the housing 110 includes a first sidewall 113 and a second sidewall 114, which are disposed opposite to each other. The first sidewall 113 and the second sidewall 114 are respectively inclined inward relative to the substrate 120, and the first sidewall 113 and the second sidewall 114 have a preset tilt angle with the substrate 120, which is an acute angle.
[0030] Because the first sidewall 113 and the second sidewall 114 are inclined inward, the cavity 170 of the housing 110 forms a gradually narrowing spatial structure. When the light emitted by the light-emitting unit 130 enters the cavity 170, the inwardly inclined first sidewall 113 and the second sidewall 114 can gradually guide the light to the first opening 111 and make the light concentrate on the first opening 111 of the housing 110, further reducing the divergence angle of the light and reducing unnecessary scattering or reflection loss of the light in the housing 110, thereby improving the utilization efficiency of the light.
[0031] In this embodiment, the cross-section of the housing 110 can be trapezoidal or inverted V-shaped. The front of the housing 110 is made of SMC (Sheet Molding Compound). For example, when the cross-section of the housing 110 is inverted V-shaped, the inverted V-shaped housing 110 and the light-emitting unit 130 can be synchronously welded onto the substrate 120. The narrower first opening 111 on the inverted V-shaped housing 110 is located directly above the multiple light-emitting units 130. The light gradually narrows and concentrates through the inner wall of the V-shape. After the light is contracted through the first opening 111, it is emitted to the light guide plate 150. This not only makes the light emitted by the light-emitting unit 130 more concentrated in the first opening 111 and reduces the angle of light divergence, but also reduces light loss and improves the problem of light leakage.
[0032] Furthermore, both the first opening 111 and the second opening 112 are elongated, and the extension directions of the first opening 111 and the second opening 112 are the same as the extension direction of the substrate 120; the width of the second opening 112 is greater than or equal to the total length of the plurality of light-emitting units 130, and the width of the first opening 111 is less than the width of the second opening 112.
[0033] Since both the first opening 111 and the second opening 112 are elongated and their extension direction is consistent with that of the substrate 120, the light emitted by the multiple light-emitting units 130 can be evenly distributed along the extension direction of the substrate 120 and emitted from the second opening 112. The light then passes through the cavity 170 of the housing 110 and illuminates the first opening 111. Furthermore, when passing through the first opening 111, a more uniform illumination effect can be formed on the light guide plate 150.
[0034] Furthermore, the width of the elongated first opening 111 is smaller than the width of the second opening 112. When light shines from the wider second opening 112 through the cavity 170 of the housing 110 onto the narrower first opening 111, the narrowing of the light by the elongated first opening 111 can change the light from a point source to a line source, thereby making the light emitted by the light-emitting unit 130 more concentrated in the first opening 111. This helps to improve the problem of a large light divergence angle and improves the light utilization efficiency.
[0035] The width of the second opening 112 is greater than or equal to the total length of the multiple light-emitting units 130, which ensures that the light emitted by all the light-emitting units 130 can smoothly enter the internal cavity 170 of the housing 110, reducing the possibility of light being blocked or lost, thereby improving the light utilization rate.
[0036] Furthermore, in this embodiment, the width of the housing 110 gradually decreases from the second opening 112 toward the first opening 111.
[0037] As the width of the housing 110 gradually decreases, the housing 110 as a whole forms a structure similar to a "funnel". This allows the light from the multiple light-emitting units 130 that enters the cavity 170 of the housing 110 through the second opening 112 to be gradually guided to the first opening 111 for emission, making the light more concentrated and further reducing the divergence angle of the light.
[0038] In addition, the gradient design of the width of the housing 110 helps to improve the propagation path of light inside the housing 110, so that the light emitted by different light-emitting units 130 can be better mixed at the first opening 111, thereby providing a more uniform and high-quality light output.
[0039] Figure 3 This is a schematic diagram of the second embodiment of the light strip of this application, as shown. Figure 3 As shown, the cavity 170 of the housing 110 is filled with an encapsulation layer 140, which covers multiple light-emitting units 130. The material used to make the encapsulation layer 140 includes epoxy resin.
[0040] In this embodiment, by filling the cavity 170 of the housing 110 with epoxy resin material, an encapsulation layer 140 is formed. Since the light-emitting unit 130 itself has an encapsulation layer 140, the additional epoxy resin material forms a secondary encapsulation of multiple light-emitting units 130, so that multiple light-emitting units 130 are wrapped in the encapsulation layer 140.
[0041] The encapsulation layer 140 can effectively protect the multiple light-emitting units 130 from external environmental factors such as moisture and dust, thereby improving the reliability and service life of the light-emitting units 130.
[0042] Furthermore, since epoxy resin has good transparency and refractive index adjustment capabilities, the encapsulation layer 140 made of epoxy resin can optimize the propagation path of light in the encapsulation layer 140, reduce light loss, and improve the optical performance of the light source.
[0043] Furthermore, the portion of the encapsulation layer 140 located at the first opening 111 does not protrude beyond the first opening 111.
[0044] Since the encapsulation layer 140 has no protruding part at the first opening 111, it is convenient to assemble the light guide plate 150 with the housing 110. This makes the light emitting surface of the first opening 111 on the housing 110 and the light receiving surface of the light guide plate 150 fit together, and it is not easy for the light guide plate 150 to warp or other phenomena to occur, which facilitates the assembly of the light guide plate 150 with the housing 110.
[0045] It is understandable that when light transitions from a low-reflectivity medium to a high-reflectivity medium, significant total internal reflection occurs due to the difference in the angle of incidence. Taking a common side-lit LED strip as an example, when the light emitted by the LED light-emitting unit enters the air and then enters the light guide plate from air with a refractive index of 1, some light is wasted due to total internal reflection before entering the light guide plate because the light guide plate material usually has a high reflectivity (e.g., MS material, with a reflectivity of 1.5), resulting in low light utilization. Based on the above problems, this application also makes improvements to the LED strip:
[0046] Figure 4 This is a schematic diagram of the third embodiment of the light strip of this application, as shown. Figure 4 As shown, Figure 4 The illustrated embodiment is based on Figure 3 In addition to the improvements, the light strip 100 also includes a light guide plate 150, which is connected to the side of the housing 110 away from the substrate 120 and covers the first opening 111. The refractive index of the light guide plate 150 is the same as that of the encapsulation layer 140.
[0047] The difference between this embodiment and the previous embodiment is that, in this embodiment, an encapsulation layer 140 is added inside the housing 110, and the light guide plate 150 is fixed together with the housing 110 at the first opening 111 using the encapsulation layer 140, so that the light guide plate 150 and the housing 110 are integrated; at the same time, the light guide plate 150 covers the first opening 111, so that all the light from the first opening 111 can enter the light guide plate 150, which is beneficial to improving the light utilization efficiency of the light guide plate 150.
[0048] When multiple light-emitting units 130 emit light, the light first enters the encapsulation layer 140 and then illuminates the light guide plate 150. Since the refractive index of the light guide plate 150 is the same as that of the encapsulation layer 140, the reflection loss and scattering phenomenon at the interface between the two are reduced, allowing more light to be efficiently transmitted from the encapsulation layer 140 to the light guide plate 150 and finally emitted from the light guide plate 150, thereby improving the light transmission efficiency.
[0049] Traditional side-lit LED strips 100 typically use surface-mount LED chips. These chips use standard blue LED chips 134 combined with red and green phosphors. Due to the limitations of the phosphors, full color gamut coverage cannot be achieved. Furthermore, parameters such as color temperature, color, and color gamut cannot be adjusted after the LED chips are manufactured, making it unsuitable for constantly changing requirements. Based on these issues, this application also improves the LED strip 100, as follows:
[0050] Figure 5 This is a schematic diagram of the connection between the substrate and the light-emitting chip in the fourth embodiment of the light strip of this application; as shown Figure 5 As shown, the light-emitting unit 130 includes a light-emitting chip 131, and the multiple light-emitting chips 131 include a red light chip 132, a green light chip 133 and a blue light chip 134. The red light chip 132, the green light chip 133 and the blue light chip 134 are arranged alternately on the substrate 120.
[0051] In this embodiment, a light-emitting chip 131 that can directly emit light is used instead of the traditional RGB LED bead structure with added phosphor. Unlike the traditional design where three chips of different colors (red, green, and blue) are placed in a single support and cannot be controlled individually, this embodiment utilizes COB (Chip On Board) technology to directly solder the three different colored chips onto the side-lit LED strip 100 substrate 120. Arranged in a specific distribution, each chip can be controlled individually. Compared to the traditional LED strip 100, this application offers purer colors, a wider color gamut, and allows for individual control of the switching on and off of each chip.
[0052] The light-emitting chip 131 can integrate a driver chip, which can independently control each red, green, and blue chip through different circuits. By adjusting the current of the three red, green, and blue chips individually, not only can stable red, green, and blue pure color light be provided, but also the color temperature, color gamut, and color can be adjusted.
[0053] In this embodiment, the three pure color light-emitting chips 131 (red, green, and blue) are mixed by the light guide plate 150 to provide a light source that meets the needs of the display. The light source parameters can be adjusted according to actual needs to generate light source outputs with different characteristics.
[0054] Each light-emitting chip 131 is positioned on the same straight line relative to the first opening 111. This allows the light emitted by the multiple light-emitting chips 131 to be distributed more evenly, making it easier to mix the light evenly when it enters the first opening 111 after being emitted from the second opening 112, thus improving the uniformity of the light emitted from the first opening 111.
[0055] Figure 6 This is a schematic diagram of the fifth embodiment of the light strip of this application, as shown. Figure 6As shown, a reflective layer 160 is provided on the inner wall of the housing 110. The reflective layer 160 is used to reflect the light emitted by the light-emitting chip 131 from the inner wall of the housing 110 to the first opening 111, and then emit it out from the first opening 111.
[0056] In this embodiment, a reflective layer 160 is provided on the inner wall of the housing 110. When the light emitted by the multiple light-emitting units 130 enters the cavity 170 of the housing 110 through the second opening 112, some of the light will illuminate the reflective layer 160 on the inner wall of the housing 110.
[0057] Due to the presence of the reflective layer 160, these rays are continuously reflected. After multiple reflections, the propagation path of the light is effectively adjusted, and it is finally concentrated and emitted towards the first opening 111. This not only further improves the divergence angle of the light, making the light more concentrated, but also improves the light utilization efficiency of the light source.
[0058] Figure 7 This is a schematic diagram of an embodiment of the display device of this application, as shown below. Figure 7 As shown in the figure, this application also discloses a display device 10, including a rear shell 200. The display device 10 also includes the aforementioned light strip 100, which is disposed on the rear shell 200. By installing the light strip 100 on the rear shell 200, different light effects can be provided for the display device 10, thereby enriching the functionality of the display device 10 and improving the user experience of the display device 10.
[0059] In traditional display devices 10, the light strip 100, due to the design of its bracket and light-emitting surface, tends to disperse light in all directions during propagation, forming a large divergence angle, which in turn poses a risk of light leakage and affects the quality of the display device 10.
[0060] Based on the above problems, this application improves the lamp strip 100 in the conventional display device 10 by installing a dimming structure 300 on the substrate 120 of the lamp strip 100. The housing 110 of the dimming structure 300 is connected to the substrate 120, thus confining multiple light-emitting units 130 on the substrate 120 within the cavity 170 of the housing 110. The housing 110 effectively shields the light emitted by the light-emitting units 130, reducing light penetration into other light-absorbing structures or locations, thereby effectively reducing light loss. Furthermore, the multiple light-emitting units 130 emit light through the second opening 112 on the housing 110. The first opening 111 directs the light out, optimizing the direction and path of light propagation. Furthermore, since the projected area of the first opening 111 on the substrate 120 is smaller than that of the second opening 112, the light emitted by the light-emitting unit 130 first enters the internal cavity 170 of the housing 110 through the larger second opening 112 and then exits from the smaller first opening 111. This process concentrates the light, thereby reducing the divergence angle. This improves the problem of the large divergence angle of the light strip 100, reduces the risk of light leakage, improves the light utilization efficiency of the light source, and thus enhances the quality of the display device 10.
[0061] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.
[0062] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.
Claims
1. A light strip, comprising a substrate and a plurality of light-emitting units, wherein the plurality of light-emitting units are arranged at intervals on the substrate, characterized in that, A dimming structure is provided on the substrate. The dimming structure includes a housing with a cavity inside. The housing is connected to the substrate. The housing has a first opening and a second opening, which are arranged opposite to each other. The second opening is located on the side of the housing closer to the substrate, and a plurality of light-emitting units are located in the second opening. The projected area of the first opening on the substrate is smaller than the projected area of the second opening on the substrate.
2. The light strip according to claim 1, characterized in that, The housing includes a first sidewall and a second sidewall, which are disposed opposite to each other. The first sidewall and the second sidewall are respectively inclined inward relative to the substrate, and the first sidewall and the second sidewall have a preset tilt angle with the substrate, wherein the preset tilt angle is an acute angle.
3. The light strip according to claim 2, characterized in that, Both the first opening and the second opening are elongated, and the extending directions of the first opening and the second opening are the same as the extending direction of the substrate. The width of the second opening is greater than or equal to the total length of the plurality of light-emitting units, and the width of the first opening is less than the width of the second opening.
4. The light strip according to claim 3, characterized in that, The width of the shell gradually decreases from the second opening toward the first opening.
5. The light strip according to claim 4, characterized in that, The cavity of the housing is filled with an encapsulation layer, which covers multiple light-emitting units. The material used to make the encapsulation layer includes epoxy resin.
6. The light strip according to claim 5, characterized in that, The portion of the encapsulation layer located at the first opening does not protrude beyond the first opening.
7. The light strip according to claim 6, characterized in that, The light strip also includes a light guide plate, which is connected to the side of the housing away from the substrate and covers the first opening. The refractive index of the light guide plate is the same as that of the encapsulation layer.
8. The light strip according to claim 7, characterized in that, The light-emitting unit includes a light-emitting chip, and the plurality of light-emitting chips include independently controlled red light chips, green light chips and blue light chips, which are arranged alternately on the substrate.
9. The light strip according to claim 8, characterized in that, A reflective layer is provided on the inner wall of the housing. The reflective layer is used to reflect the light emitted by the light-emitting chip from the inner wall of the housing to the first opening and then out through the first opening.
10. A display device, comprising a rear cover, characterized in that, The display device further includes a light strip as described in any one of claims 1 to 9, the light strip being disposed on the rear housing.