Display device

Abstract

A display device includes a display panel and a backlight module. The backlight module includes a light-emitting unit and a light guiding unit. The light guiding unit has a light input surface. The light-emitting unit has a plurality of light-emitting elements, which are disposed along a first direction and adjacent to the light input surface. A second direction is from the light input surface to the light-emitting unit. The light guiding unit includes a first protruding portion, which includes a part of the light input surface. The light input surface includes a connecting surface, which connects to the first protruding portion to form a turning portion. The turning portion is disposed between the connecting surface and the first protruding portion. The connecting surface is a planar or curved surface protruding along the second direction. The first protruding portion protrudes along the second direction and extends along the first direction.

What is claimed is: 
     
         1 . A display device, comprising:
 a display panel; and   a backlight module disposed corresponding to the display panel and comprising a light-emitting unit and a light guiding unit, wherein the light guiding unit has a light input surface, a bottom surface and a top surface, the light input surface connects the bottom surface and the top surface, the light-emitting unit has a plurality of light-emitting elements, the light-emitting elements are disposed along a first direction and adjacent to the light input surface, a second direction is a direction from the light input surface to the light-emitting unit, and a third direction is perpendicular to the first direction and the second direction;   wherein, the light guiding unit comprises a first protruding portion, the first protruding portion comprises a part of the light input surface, the light input surface comprises a connecting surface, the connecting surface connects to the first protruding portion to form a turning portion, and the turning portion is disposed between the connecting surface and the first protruding portion;   wherein, the connecting surface is a planar surface or a curved surface protruding along the second direction, and the first protruding portion protrudes along the second direction and extends along the first direction.   
     
     
         2 . The display device of  claim 1 , wherein the first protruding portion comprises a part of the bottom surface or the top surface. 
     
     
         3 . The display device of  claim 2 , wherein a shortest distance between the turning portion and the top surface or between the turning portion and the bottom surface along the third direction is greater than or equal to 0.18 μm and is less than or equal to 100 μm. 
     
     
         4 . The display device of  claim 1 , wherein the first protruding portion has a vertex, and a shortest distance between the vertex and the turning portion along the second direction is greater than or equal to 0.18 μm and is less than or equal to 30 μm. 
     
     
         5 . The display device of  claim 1 , wherein the connecting surface is a curved surface protruding along the second direction, and a ratio of a maximum protruding distance of the connecting surface along the second direction to a width of the light guiding unit along the first direction is greater than 1/500 and less than 1. 
     
     
         6 . The display device of  claim 1 , wherein the light guiding unit comprises two of the first protruding portions, and the two first protruding portions connect to two opposite sides of the connecting surface to form two of the turning portions. 
     
     
         7 . The display device of  claim 6 , wherein the two first protruding portions have different dimensions along the second direction. 
     
     
         8 . The display device of  claim 1 , wherein the light input surface further comprises a plurality of grooves, each of the grooves has an arc shape, and the grooves are depressed to a counter direction of the second direction and extend along the third direction. 
     
     
         9 . The display device of  claim 8 , wherein a second protruding portion is formed between two of the grooves adjacent to each other, and the second protruding portion comprises an arc surface protruding along the second direction. 
     
     
         10 . The display device of  claim 9 , wherein a ratio of a maximum protruding distance of the second protruding portion along the second direction to a thickness of the light guiding unit along the third direction is greater than 1/500 and less than 1/10. 
     
     
         11 . A display device, comprising:
 a display panel; and   a backlight module disposed corresponding to the display panel and comprising a light-emitting unit and a light guiding unit, wherein the light guiding unit has a light input surface, a bottom surface and a top surface, the light input surface connects the bottom surface and the top surface, and the light-emitting unit is disposed adjacent to the light input surface;   wherein, the light input surface comprises at least two regions, and the at least two regions have different surface roughnesses.   
     
     
         12 . The display device of  claim 11 , wherein the light-emitting unit has a plurality of light-emitting elements, the light-emitting elements are disposed along a first direction, a second direction is a direction from the light input surface to the light-emitting unit. 
     
     
         13 . The display device of  claim 11 , wherein the light guiding unit includes a first protruding portion, and the first protruding portion includes a part of the light input surface, the light input surface comprises a connecting surface, the connecting surface connects to the first protruding portion to form a turning portion, and the turning portion is disposed between the connecting surface and the first protruding portion. 
     
     
         14 . The display device of  claim 13 , wherein the connecting surface is a planar surface or a curved surface protruding along the second direction, and the first protruding portion protrudes along the second direction and extends along the first direction. 
     
     
         15 . The display device of  claim 11 , wherein the light guiding unit is a flat plate, a wedge plate, or a flat plate with a horn shape. 
     
     
         16 . The display device of  claim 11 , wherein the two regions comprises a first region and a second region, and the first region or the second region comprises a plurality of microstructures. 
     
     
         17 . The display device of  claim 16 , wherein the microstructures are extended along a third direction, and the third direction is perpendicular to the first direction and the second direction. 
     
     
         18 . The display device of  claim 16 , wherein the microstructures have different pitches. 
     
     
         19 . The display device of  claim 16 , wherein the first region is connected to the top surface and the second region is connected to the bottom surface. 
     
     
         20 . The display device of  claim 19 , wherein a surface roughness of the first region is less than a surface roughness of the second region.