Black light module with mount and displaying apparatus therewith

• US 9,507,078 B2
• Filed: 12/25/2014
• Issued: 11/29/2016
• Est. Priority Date: 06/17/2014
• Status: Active Grant

• Current Assignee: Wistron Corporation
• Original Assignee: Wistron Corporation
• Inventors: Chiu, Yu-Wei, Wu, Wen-Lin
• Primary Examiner(s): Nguyen, Hoan C
• Application Number:
  US14/583,108
• Publication Number:
  US 20150362663A1
• Time in Patent Office: 705 Days
• Field of Search: 349/61, 349/62, 349/67
• US Class Current: 1/1
• CPC Class Codes: G02B 6/0055 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence

Abstract

A displaying apparatus includes a back light module and a panel module. The back light module is joined with the panel module and includes a mount, a light bar, a light guiding plate, and an optical film sheet. The mount includes a limiting structure and a holding structure. The light bar is fixed on the mount. The light guiding plate is disposed adjacent to the mount. The limiting structure constrains a stop structure so that a light incident side surface of the light guiding plate and the light bar remain separated at a predetermined interval. The optical film sheet includes a holding structure and is disposed above alight emitting surface of the light guiding plate. The two holding structures are engaged. Thereby, the mount performs limitation to both of the light guiding plate and the optical film sheet.

Claims

1. A back light module, comprising:

a mount extending in an extension direction and comprising a limiting structure and a first holding structure;

a back plate comprising a third holding structure, the third holding structure comprising a hook, the mount being fixed on the back plate;

a light bar disposed on the mount along the extension direction;

a light guiding plate adjacent to the mount, the light guiding plate having a light incident side surface, a light emitting surface, and a stop structure, the light incident side surface extending in the extension direction and being disposed corresponding to the light bar so that light emitted by the light bar is capable of entering the light guiding plate from the light incident side surface, the limiting structure constraining the stop structure so that the light incident side surface and the light bar remain separated at a predetermined interval; and

an optical film sheet comprising a first side portion, a second side portion, a second holding structure, and a fourth holding structure, the first side portion being adjacent to or opposite to the second side portion, the second holding structure being located at the first side portion, the optical film sheet being disposed above the light emitting surface, the second holding structure being engaged with the first holding structure so that when the back light module is disposed vertically for use, the optical film sheet remains flat, the fourth holding structure comprising a through hole, the hook of the third holding structure hooking the through hole of the fourth holding structure.

2. The back light module of claim 1, wherein the mount comprises a main portion, a dissipation portion, and a clamping portion, the dissipation portion and the clamping portion are connected with two sides of the main portion oppositely relative to the extension direction, the light bar is fixed on the main portion, the light guiding plate is held between the dissipation portion and the clamping portion, the light emitting surface is toward the clamping portion, and the first holding structure is disposed on the clamping portion.

3. The back light module of claim 2, wherein the first side portion is disposed on the clamping portion opposite to the light guiding plate.

4. The back light module of claim 2, further comprising a reflection sheet disposed between the light guiding plate and the dissipation portion.

5. The back light module of claim 4, further comprising a spacer, disposed between the reflection sheet and the dissipation portion and separating the reflection sheet and the dissipation portion.

6. The back light module of claim 2, wherein the limiting structure is disposed on the dissipation portion.

7. The back light module of claim 1, wherein the first holding structure comprises a hook, the second holding structure comprises a through hole, and the hook of the first holding structure hooks the through hole of the second holding structure.

8. The back light module of claim 1, wherein the limiting structure is located at an end of the mount in the extension direction.

9. The back light module of claim 1, wherein the limiting structure constrains the stop structure so that a movement of the light guiding plate in the extension direction is limited.

10. The back light module of claim 9, wherein the stop structure comprises an indentation located at a circumference of the light guiding plate, and the limiting structure fits in the indentation.

11. The back light module of claim 1, wherein the back plate comprises a side wall, the third holding structure is located on the side wall, and the fourth holding structure is located at the second side portion.

12. The back light module of claim 1, wherein the mount has a C-shaped profile perpendicular to the extension direction.

13. The back light module of claim 1, wherein the light incident side surface is right opposite to the light bar.

14. A displaying apparatus, comprising:

a back light module, comprising;

a mount extending in an extension direction and having a C-shaped profile perpendicular to the extension direction, the mount comprising a limiting structure and a first holding structure;

a back plate comprising a third holding structure, the third holding structure comprising a hook, the mount being fixed on the back plate;

a light bar disposed on the mount along the extension direction;

a light guiding plate adjacent to the mount, the light guiding plate having a light incident side surface, a light emitting surface, and a stop structure, the light incident side surface extending in the extension direction and being right opposite to the light bar, the limiting structure constraining the stop structure so that the light incident side surface and the light bar remain separated at a predetermined interval; and

an optical film sheet comprising a first side portion, a second side portion, a second holding structure, and a fourth holding structure, the first side portion being adjacent to or opposite to the second side portion, the second holding structure being located at the first side portion, the optical film sheet being disposed above the light emitting surface, the second holding structure being engaged with the first holding structure, the fourth holding structure comprising a through hole, the hook of the third holding structure hooking the through hole of the fourth holding structure; and

a panel module joined with the back light module, the panel module comprising;

a panel disposed above the optical film sheet.

15. The displaying apparatus of claim 14, wherein the mount comprises a main portion, a dissipation portion, and a clamping portion, the dissipation portion and the clamping portion are connected with two sides of the main portion oppositely relative to the extension direction, the light bar is fixed on the main portion, the light guiding plate is held between the dissipation portion and the clamping portion, the light emitting surface is toward the clamping portion, and the first holding structure is disposed on the clamping portion.

16. The displaying apparatus of claim 15, wherein the first side portion is disposed on the clamping portion opposite to the light guiding plate.

17. The displaying apparatus of claim 15, wherein the back light module comprises a reflection sheet disposed between the light guiding plate and the dissipation portion.

18. The displaying apparatus of claim 17, wherein the back light module comprises a spacer, disposed between the reflection sheet and the dissipation portion and separating the reflection sheet and the dissipation portion.

19. The displaying apparatus of claim 15, wherein the limiting structure is disposed on the dissipation portion.

20. The displaying apparatus of claim 14, wherein the first holding structure comprises a hook, the second holding structure comprises a through hole, and the hook of the first holding structure hooks the through hole of the second holding structure.

21. The displaying apparatus of claim 14, wherein the limiting structure is located at an end of the mount in the extension direction.

22. The displaying apparatus of claim 14, wherein the limiting structure constrains the stop structure so that a movement of the light guiding plate in the extension direction is limited.

23. The displaying apparatus of claim 22, wherein the stop structure comprises an indentation located at a circumference of the light guiding plate, and the limiting structure fits in the indentation.

24. The displaying apparatus of claim 14, wherein the panel module comprises an inner frame and an outer frame, the inner frame and the outer frame fix the panel, the back plate comprises a side wall, the third holding structure is located on the side wall, the fourth holding structure is located at the second side portion, and the inner frame is joined with the back plate and located between the back plate and the outer frame.