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Backlight unit

A technology of backlight unit and light diffusion, which is applied in the directions of optics, electrical components, nonlinear optics, etc., can solve the problems of reducing the thickness of the backlight unit and the display device, and achieve the effect of local dimming and thickness reduction.

Pending Publication Date: 2021-03-19
SEOUL SEMICONDUCTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the direct type backlight unit, since the light emitting diode chip is arranged at the lower part of the light diffusion member, there is a limitation in reducing the thickness of the backlight unit and the display device.

Method used

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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In order to fully convey the idea of ​​the present invention to those skilled in the art, the embodiments described below are provided as examples. Therefore, the present invention is not limited to the Examples described below, and may be embodied in other forms. In addition, in the drawings, the width, length, thickness, and the like of constituent elements may be exaggerated for convenience of description. Throughout the specification, the same reference symbols represent the same constituent elements, and similar reference symbols represent similar constituent elements.

[0037] A backlight unit according to an embodiment of the present invention includes: a circuit substrate; at least one light emitting diode chip mounted on the circuit substrate; a plurality of reflective components arranged on the upper part of the light emitting diode chip; and a light ...

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Abstract

The present invention relates to a backlight unit. According to an embodiment of the present invention, the backlight unit comprises: a circuit board; at least one light-emitting diode chip mounted onthe circuit board; a plurality of reflection members arranged on the upper part of the light-emitting diode chip; and a light diffusion member. The light diffusion member has an incident surface on which light is incident and an emitting surface from which light is emitted, and is arranged on the upper part of the circuit board. The plurality of reflection members are stacked on each other, and reflect a part of light emitted from the upper surface of the light-emitting diode chip. In addition, the incident surface of the light diffusion member covers side surfaces of the light-emitting diodechip, side surfaces of the reflection members, and upper surfaces of the reflection members.

Description

[0001] This application is a divisional application of the invention patent application "backlight unit" with the filing date of December 10, 2018 and the application number of 201880005570.6. technical field [0002] The invention relates to a backlight unit. Background technique [0003] As a display device having a light-receiving type element that does not have a self-emitting light source, a separate light source device capable of illuminating the entire screen from behind is required. The illuminating device used for such a display device is generally called a backlight unit (Back Light Unit). [0004] Generally, the backlight unit is classified into an edge type and a direct type according to the way of arranging light sources (such as LED chips) emitting light. [0005] The edge type backlight unit employs a method of arranging a light source on a side of a light diffusion member that guides light. However, for the edge type backlight unit, since the light emitting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50H01L33/60H01L25/075
CPCH01L25/0753H01L33/505H01L33/60H01L33/46G02F1/133603G02F1/133605G02F1/133614F21Y2105/16F21Y2115/10F21V3/12F21V9/30F21V7/24F21V7/04F21V13/08G02B6/0055G02B6/0073G02F1/133606H01L33/06H01L33/12H01L33/14H01L33/32H01L33/42H01L33/502
Inventor 李贞勳
Owner SEOUL SEMICONDUCTOR
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