Light emitting device for achieving uniform light distribution and backlight unit employing the same
A technology for light-emitting devices and backlight units, which is applied to semiconductor devices of light-emitting elements, identification devices, lighting devices, etc., can solve the problem that light does not pass through certain areas.
Inactive Publication Date: 2006-11-08
SAMSUNG ELECTRONICS CO LTD
View PDF0 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0009] However, this improved light emitting device 28 also has the problem that light does not pass through certain areas.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] The present invention will be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.
[0031] Figure 3A to Figure 3C shows a light emitting device according to an exemplary embodiment of the present invention, Figure 3A is a perspective view of a light-reflecting element of a light-emitting device, Figure 3B is a perspective view of the light-transmitting element of the light-emitting device, while Figure 3C is a vertical cross-sectional view of the light-emitting device.
[0032] refer to Figure 3A , the light emitting device 30 includes a light reflective element 31 having an inclined light reflective surface. Each of the four inclined light reflecting surfaces has a rectangular cross-section whose width increases upward. Also, the light reflection element 31 may have a rectangular flat bottom surface. Thus, the light reflective member 31 looks like an inverted pyramid whose apex is cut h...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A light emitting device for achieving uniform light distribution and a backlight unit employing the light emitting device. The light emitting device includes: a light reflecting member having light reflecting surfaces by which light is reflected; a light transmitting member formed on the light reflecting surfaces of the light reflecting member and having light emitting surfaces; and a point light source emitting light to the light transmitting member. The light emitting surfaces of the light transmitting member through which light incident from the point light source is emitted include: a flat directly emitting surface facing the point light source, and directly passing light emitted from the point light source to the outside of the light transmitting member; and a curved totally reflecting surface formed around the directly emitting surface, and totally reflecting light emitted from the point light source to the light reflecting member and passing light reflected by the light reflecting member to the outside of the light transmitting member.
Description
[0001] Backlight unit using the light emitting device technical field [0002] The present invention relates to a light emitting device for achieving uniform light distribution and a backlight unit using the light emitting device, and in particular, to a light emitting device that emits light uniformly only to a specific area and a direct lighting type using the light emitting device backlight unit. Background technique [0003] A liquid crystal display (LCD), a type of flat panel display, is a non-luminous display that does not emit light by itself, but receives external light to form an image. In this case, a backlight unit is installed on the rear side of the LCD to emit light. Cold Cathode Fluorescent Lamps (CCFLs) and are mainly used as light sources for LCD backlight units. Recently, backlight units using point light sources such as light emitting diodes (LEDs) instead of CCFLs have been developed. A backlight unit using point light sources such as LEDs has a higher...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335G02F1/133G09F9/00G09F9/35H01L33/54H01L33/60
CPCG02F1/133603G02F1/133605H01L33/54H01L33/60F21K9/68G02F1/1335
Inventor 卢知焕王种敏
Owner SAMSUNG ELECTRONICS CO LTD