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KR-20260062445-A - SUPPORT STRUCTURE AND BACKLIGHT UNIT INCLUDING SAME

KR20260062445AKR 20260062445 AKR20260062445 AKR 20260062445AKR-20260062445-A

Abstract

The support structure of the present invention serves to support one side of a light guide plate and is attached to a PCB on which an LED array is installed. The body extends in the direction in which the LED array is arranged, and the protruding support portion is positioned between the LEDs to provide close support to the light guide plate. The protruding support portion is formed higher than the LED array to stably support the light guide plate. The large attachment surface area increases the strength of the support structure and simplifies the attachment process.

Inventors

  • 김용일
  • 이동호
  • 양성모
  • 김세호

Assignees

  • 엘지전자 주식회사

Dates

Publication Date
20260507
Application Date
20241029

Claims (7)

  1. A support structure that supports a light guide plate, wherein an LED array that causes light to be incident on one side of the light guide plate is attached to one side of a PCB on which the LED array is installed on one side, the support structure that supports the light guide plate A body formed by extending in a first direction in which the above LED array is arranged, and having a lower surface attached to one side of the PCB; It includes a protruding support member formed to protrude toward the LED array from one side of the body and positioned between the first LED and the second LED of the LED array. The above protruding support The upper surface is formed higher than the height of the LED array and is in close contact with one side of the light guide plate, thereby supporting the light guide plate. Support structure.
  2. In paragraph 1, The above protruding support Characterized by being formed in multiple numbers and arranged along the first direction. Support structure.
  3. In paragraph 2, Some of the above-mentioned protruding support members are characterized by being arranged at intervals corresponding to the third LED length of the LED array. Support structure.
  4. In paragraph 1, The above body and the above protruding support Characterized by being made of an opaque material Support structure.
  5. In paragraph 1, A fastening portion further comprising a convexly protruding portion from the lower surface of the body for coupling to the PCB. Support structure.
  6. In paragraph 1, A double-sided tape further comprising a lower surface of the body and a device for attaching the body to one surface of the PCB. Support structure.
  7. A light guide plate that scatters light incident on one side and sends it to the front; An LED array that transmits light to one side of the light guide plate; A PCB with the above LED array installed on one side; and It includes a support structure attached to one side of the PCB and supporting the light guide plate, and The above support structure A body formed by extending in a first direction in which the above LED array is arranged, and having a lower surface attached to one side of the PCB; and It includes a protruding support member formed to protrude in a direction toward the LED array from the side of the body and positioned between the first LED and the second LED of the LED array. The above protruding support The upper surface is formed higher than the height of the LED array and is in close contact with one side of the light guide plate, thereby supporting the light guide plate. Backlight unit.

Description

Support structure and backlight unit including the same The present invention relates to a support structure and a backlight unit including the same, and more specifically, to a support structure that supports a light guide plate of a backlight unit. Liquid crystal displays account for a very large share of information display technology. Liquid crystal displays display information by inserting liquid crystals between two glass substrates, injecting electrodes through power sources located above and below the glass substrates, and converting them in each liquid crystal to emit light. Since the above liquid crystal display device is a photoreceiving element that cannot emit light on its own and displays an image by controlling the transmittance of light entering from the outside, a separate device, namely a backlight unit, is required to irradiate light onto the liquid crystal panel. Recently, Light Emitting Diodes (LEDs) have been gaining prominence as light sources for backlight units in Liquid Crystal Displays (LCDs). LEDs are semiconductor light-emitting devices that emit light when current flows through them. Due to their long lifespan, low power consumption, fast response speed, and excellent initial driving characteristics, LEDs are widely used as backlight units for lighting devices, electronic billboards, and display devices, and their application fields are steadily expanding. LED (Light Emitting Diode) packages are gradually shifting toward CSP (Chip Scale Package), which has a mounting area of 120% or less of the chip area, for the purpose of miniaturization and high efficiency. As LED packages become smaller, the walls of the LED lead frame disappear, requiring a different mechanism for LED light concentration. The new mechanism must perform the tasks of LED light concentration and supporting the light guide plate. Previously, lenses were attached to each LED to concentrate light, and so-called 'U' pads or 'T' pads were used for protection. However, since these U or T pads involve a process of soldering each pad, there is a problem in that not only are component costs incurred, but manufacturing costs also increase due to the soldering process. FIG. 1 is a drawing for explaining a conventional support structure. FIG. 1 (a) is a drawing showing a PCB with a conventional support structure (10) installed, and FIG. 1 (b) is an enlarged drawing of part B of FIG. 1 (a). Referring to FIG. 1, a plurality of conventional support structures (10) may be attached to one side of a PCB (20) on which an LED array is attached. A conventional support structure (10) may have a U-shaped structure. A support structure (10) of this type may be manufactured with a size corresponding to the size of one LED in an LED array (30) and may be attached adjacent to an LED that is a point light source. The support structure (10) is configured to support the side of the light guide plate and can also perform the role of protecting the LED and concentrating the light emitted from the LED. Conventional support structures could perform the role of supporting the light guide plate, but there were various problems. First, in terms of process, the conventional support structure (10) was designed with a U-shaped structure and parts, so a lot of work was required in the attachment process. This resulted in work inconvenience because precise positioning was required during attachment. Furthermore, there was a problem of reduced product reliability due to inaccurate assembly occurring during this process. In addition, the attachment area of the conventional support structure (10) was small, so problems occurred where the support structure detached from or shook the PCB due to vibration or external impact. As a result, the reliability of the support structure (10) was low, and there were also problems with durability during long-term use. FIG. 1 is a drawing illustrating a conventional support structure. FIG. 2 is a drawing for explaining a support structure according to one embodiment of the present invention. FIG. 3 is a support structure according to one embodiment of the present invention. FIG. 4 is an exploded perspective view illustrating a part of a backlight unit according to one embodiment of the present invention. Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols are given the same reference number, and redundant descriptions thereof will be omitted. The suffixes "module" and "part" for components used in the following description are assigned or used interchangeably solely for the sake of ease of drafting the specification, and do not inherently possess distinct meanings or roles. Furthermore, in describing the embodiments disclosed in this specification, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions could obscure the essence of th