Display device

Patent metadata

Field	Value
Publication number	US-10012788-B2
Application number	US-201414769240-A
Country	US
Kind code	B2
Filing date	Oct 1, 2014
Priority date	Jul 31, 2014
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A display device includes a display panel, a light guide plate, a first light source and a second light source. The display panel is provided with a plurality of pixel units arranged in an array, the light guide plate includes a first reflection structure and a second reflection structure. The first reflection structure reflects light emitted from the first light source to the pixel units of the display unit and the light is guided to a first view side after passing through the display panel. The second reflection structure reflects light emitted from the second light source to the pixel units of the display panel and the light is guided to a second view side after passing through the display panel. The above display panel is capable of achieving naked eye dual vision display without wearing dedicated glasses.

First claim

What is claimed is:

1. A display device comprising: a display panel, a light guide plate, a first light source and a second light source,
wherein the display panel is provided with a plurality of pixel units arranged in an array;
the light guide plate is located at a light entrance side of the display panel and the light guide plate has a first reflection structure and a second reflection structure;
the first reflection structure directs light emitted from the first light source to the pixel units of the display panel, and the light is further guided to a first view side after passing through the display panel; and
the second reflection structure directs light emitted from the second light source to the pixel units of the display panel, and the light is guided to a second view side after passing through the display panel;
the plurality of pixel units of the display panel comprises a plurality columns of even column pixel units and a plurality columns of odd column pixel units spaced from each other in a row direction;
the plurality columns of odd column pixel units correspond to the first reflection structure which guides the light emitted from the first light source to corresponding odd column pixel units; and
the plurality columns of even column pixel units correspond to the second reflection structure which guides the light emitted from the second light source to corresponding even column pixel units.

2. The display device according to claim 1 , wherein the light guide plate is formed with a plurality of first reflection faces and a plurality of second reflection faces on a side facing away from the display panel, and the first reflection faces and the second reflection faces are alternately provided, and the first reflection faces form the first reflection structure, and the second reflection faces form the second reflection structure.

3. The display device according to claim 2 , wherein, between the first light source and the second light source, for any two adjacent frame display time, in one frame display time, the first light source emits light and the second light source is turned off, and in another frame display time, the second light source emits light and the first light source is turned off.

4. The display device according to claim 2 , wherein in two opposite side surfaces of the light guide plate, one side surface forms a first light entrance side surface, and the other side surface forms a second light entrance side surface, and each of the side surfaces is parallel with a column direction of the pixel units of the display panel and perpendicular to the light entrance side of the display panel, and
the first light source is located at the first light entrance side surface of the light guide plate, and the second light source is located at the second light entrance side surface of the light guide plate.

5. The display device according to claim 4 , further including a dual vision display refraction film located between the light guide plate and the display panel;
wherein a side surface of the dual vision refraction film facing the light guide plate is formed with a plurality of first refraction faces, to guide light exiting from the light guide plate after being reflected by the first reflection face into the dual vision display refraction film;
a side surface of the dual vision display refraction film facing the light guide plate is formed with a plurality of second refraction faces, to guide light exiting from the light guide plate after being reflected by the second reflection face into the dual vision display refraction film;
a side surface of the dual vision display refraction film facing the display panel is formed with a plurality of arc-shaped protrusions arranged along a row direction of the pixel units of the display panel;
in the row direction of the pixel units of the display panel, each of the arc-shaped protrusions has a width larger than or equal to a width of the pixel unit;
the light reflected by each of the first reflection face is introduced into the corresponding pixel unit by being refracted by the arc-shaped protrusions after being introduced into the dual vision display refraction film through the first refraction face, and the light reflected by each of the second reflection face is introduced into the corresponding pixel unit by being refracted by the arc-shaped protrusions after being introduced into the dual vision display refraction film through the first refraction face.

6. The display device according to claim 5 , wherein in the row direction of the pixel units of the display panel, a projection of an intersection line between any two adjacent arc-shaped protrusions on the display panel is coincident with a central line of one column of the pixel units, and a diameter of the arc face of each of the arc-shaped protrusions is larger than or equal to the width of the pixel unit;
each of the pixel unit has at least three sub-pixel units, and in the column direction of the pixel units of the display panel, a central line of an arc face of the arc-shaped protrusion is offset from a vertical angle line of the triangular protrusion by a width of at least one sub-pixel unit.

7. The display device according to claim 6 , wherein in the dual vision display refraction film, an angle formed between any two adjacent first refraction face and second refraction face is from 100 degree to 120 degree.

8. The display device according to claim 4 , wherein, between the first light source and the second light source, for any two adjacent frame display time, in one frame display time, the first light source emits light and the second light source is turned off, and in another frame display time, the second light source emits light and the first light source is turned off.

9. The display device according to claim 4 , wherein a side surface of the light guide plate facing away from the display panel is formed with a plurality of micro-structure prism grooves, each of the micro-structure prism grooves has its length direction parallel with the column direction of the pixel units of the display panel; and
each of the micro-structure prism grooves comprises one of the first reflection faces and one of the second reflection faces.

10. The display device according to claim 9 , wherein a refraction index n of the light guide plate is from 1.49 to 1.53;
along a direction perpendicular to the display panel, a depth h of each of the micro-structure prism grooves ranges 10 μm≤h≤50 μm; and
in each of the micro-structure prism grooves, the first reflection face and the second reflection face form an angle α of 110 degree to 130 degree therebetween.

11. The display device according to claim 10 , wherein, the first light source include a plurality of light emitting diode (LED) lamps and a reflection device, the reflection device has an opening towards the light guide plate and an inner surface forming an arch-shaped reflection cavity;
each of the LED lamps is located at a center axis of the reflection cavity and emits light in a direction facing away from the opening of the reflection cavity.

12. The display device according to claim 1 , wherein, between the first light source and the second light source, for any two adjacent frame display time, in one frame display time, the first light source emits light and the second light source is turned off, and in another frame display time, the second light source emits light and the first light source is turned off.

13. A display device comprising: a display panel, a light guide plate, a first light source and a second light source;
wherein the display panel is provided with a plurality of pixel un

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Display Tech Co

Inventors

• Yu Yangbing
• Hu Weihao
• Yoon Daekeun
• Liao Yanping
• Shao Xibin
• Guo Rui
• Zhao Weijie

Classifications

• G02B27/0101

  characterised by optical features (G02B27/0172 takes precedence) · CPC title

• G02B3/0068

  arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements (G02B5/1885, G02B17/002, G02B30/27 take precedence) · CPC title

• G02B3/0056

  arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses (G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085) · CPC title

• G02B6/00

  Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings · CPC title

• G02B6/0055 Primary

  Reflecting element, sheet or layer · CPC title