Display device

Patent metadata

Field	Value
Publication number	US-2017153377-A1
Application number	US-201615196254-A
Country	US
Kind code	A1
Filing date	Jun 29, 2016
Priority date	Dec 1, 2015
Publication date	Jun 1, 2017
Grant date	—

Abstract

A display device includes a display panel, a light guide plate disposed under the display panel, a light source which provides a side surface of the light guide plate with incident light, a reflective plate disposed under the light guide plate, a first optical adjustment member which includes first scattering particles which scatter a first color wavelength range of the incident light into a first value and scatter a second color wavelength range of the incident light into a second value, and a second optical adjustment member which includes second scattering particles which scatter the first color wavelength range of the incident light into a third value and scatter the second color wavelength range of the incident light into a fourth value.

First claim

What is claimed is:

1 . A display device comprising:
a display panel which includes a displaying surface defined by a first direction and a second direction; a light guide plate which is disposed under the display panel; a light source which provides an incident light to a side surface extending in the first direction among side surfaces of the light guide plate; a reflective plate which is disposed under the light guide plate; a first optical adjustment member which is disposed between the reflective plate and the light guide plate and includes first scattering particles which scatter a first color wavelength range of the incident light into a first value, and scatter a second color wavelength range of the incident light into a second value, wherein the difference between the first value and the second value is defined as a first difference value; and a second optical adjustment member which is disposed between the reflective plate and the light guide plate and includes second scattering particles which scatter the first color wavelength range of the incident light into a third value, and scatter the second color wavelength range of the incident light into a fourth value, wherein the difference between the third value and the fourth value is defined as a second difference value higher than the first difference value, wherein the first difference value is adjusted according to sizes of the first scattering particles, the second difference value is adjusted according to sizes of the second scattering particles, and the first optical adjustment member is disposed more adjacent to the side surface in the second direction than to the second optical adjustment member.

2 . The display device of claim 1 , wherein the first optical adjustment member overlaps the second optical adjustment member in at least one portion.

3 . The display device of claim 1 , wherein the first optical adjustment member, on the reflective plate, is spaced apart from the second optical adjustment member in the second direction.

4 . The display device of claim 3 , wherein the second optical adjustment member is disposed adjacent to another side surface facing the side surface in the second direction.

5 . The display device of claim 1 , wherein when sizes of the first scattering particles and sizes of the second scattering particles are included within a first range, the second difference value is greater than the first difference value as the sizes of the first and second scattering particles are smaller in the first range.

6 . The display device of claim 5 , wherein the first range is from about 0.15 micrometer to about 0.20 micrometer.

7 . The display device of claim 1 , wherein the first color wavelength range is defined as a wavelength range of blue light, and the second color wavelength range is defined as a wavelength range of one of red and yellow light.

8 . The display device of claim 1 , wherein areas of the first and second optical adjustment members are different from each other.

9 . A display device comprising:
a display panel which includes a displaying surface defined by first and second directions; a light guide plate which is disposed under the display panel; a light source which provides an incident light to a side surface extending in the first direction among side surfaces of the light guide plate; a reflective plate which is disposed under the light guide plate; and an optical adjustment member which is disposed between the reflective plate and the light guide plate and includes scattering particles which scatter a first color wavelength range of the incident light into a first value, and scatter a second color wavelength range of the incident light into a second value, wherein the difference between the first value and the second value is defined as a first difference value, and the optical adjustment member is disposed adjacent to another side surface facing the side surface in the second direction.

10 . The display device of claim 9 , wherein when sizes of the scattering particles are included within the first range, the first difference value is greater as the sizes of the scattering particles are smaller in the first range.

11 . The display device of claim 10 , wherein the first range is from about 0.15 micrometer to about 0.20 micrometer.

12 . The display device of claim 9 , wherein the optical adjustment member contacts the another side surface in the second direction.

13 . The display device of claim 9 , wherein the first color wavelength range is defined as a wavelength range of blue light, and the second color wavelength range is defined as a wavelength range of one of red and yellow light.

14 . A display device comprising:
a display panel which includes a displaying surface defined by first and second directions; a light guide plate which is disposed under the display panel; a first light source which provides an incident light to a side surface extending in the first direction among side surfaces of the light guide plate; a second light source which provides the incident light to another side surface facing the side surface; a reflective plate which is disposed under the light guide plate; and an optical adjustment member which is disposed between the reflective plate and the light guide plate and includes scattering particles which scatter a first color wavelength range of the incident light into a first value, and scatter a second color wavelength range of the incident light into a second value, wherein the difference between the first value and the second value is defined as a first difference value, and the optical adjustment member is disposed on a central portion between the side surface and the another side surface facing the side surface in the second direction.

15 . The display device of claim 14 , wherein the optical adjustment member further comprises second scattering particles which scatter the first color wavelength range into a third value and scatter the second color wavelength range into a fourth value, wherein the difference between the third and fourth values are defined as a second difference value greater than the first difference value.

16 . The display device of claim 14 , wherein when the sizes of the scattering particles are included within the first range, the first difference value is larger as the sizes of the scattering particles are smaller in the first range.

17 . The display device of claim 16 , wherein the first range is from about 0.15 micrometer to about 0.20 micrometer.

18 . The display device of claim 14 , wherein the light guide plate includes a glass.

19 . The display device of claim 14 , wherein the first color wavelength range is defined as a wavelength range of blue light, and the second color wavelength range is defined as the wavelength range of one of red and yellow light.

20 . The display device of claim 14 , wherein the reflective plate comprises a first reflective region on which the scattering particles are not disposed and a second reflective region on which the scattering particles are disposed.

Assignees

• Samsung Display Co Ltd

Inventors

• Song Hyun-Hwa
• Park Chan-Jae
• Lee Hayoung
• Chung Seunghwan

Classifications

• G02B27/0025

  for optical correction, e.g. distorsion, aberration · CPC title

• G02B6/0068 Primary

  Arrangements of plural sources, e.g. multi-colour light sources · CPC title

• G02B6/0033 Primary

  Means for improving the coupling-out of light from the light guide · CPC title

• G02B6/0051

  Diffusing sheet or layer · CPC title

• G02B6/0055

  Reflecting element, sheet or layer · CPC title